JP6504271B2 - Stator and compressor - Google Patents

Description

  The present invention relates to a stator for a compressor motor and a compressor.

  The hermetic compressor includes a compression mechanism portion that compresses a refrigerant, an electric mechanism portion that drives the compression mechanism portion, and a sealed container that houses the compression mechanism portion and the electric mechanism portion. The motorized mechanism portion is composed of a rotor and a cylindrical stator provided outside the rotor. The stator is composed of a stator core on which electromagnetic steel sheets are laminated, and a stator winding. The stator core is composed of a back yoke that constitutes a cylindrical portion of the outer edge, and teeth that are provided inside the back yoke to wind the stator winding.

  The loss of the motorized mechanism includes an iron loss caused by a loss of magnetic flux and a copper loss caused by a current flowing in a stator winding. The copper loss is reduced by using a thick wire for the stator winding and reducing the electrical resistance. However, the winding space of the stator needs to be sized so that the winding jig does not contact or interfere with the stator when winding the winding around the stator. If a wire having a large diameter is wound as a stator winding in a state where the space for winding the stator is not sufficient, the necessary number of turns can not be wound. As a result, the motorized mechanism can not generate the required torque.

  As a method of expanding the winding space of the stator, for example, there is a method of dividing the stator core. The cylindrical stator core is divided by the back yoke, and the winding is wound around the teeth. Thereafter, the divided stator cores are joined to form one stator core.

The method of joining the divided stator cores is to join the joints by welding. For example, as in Patent Document 1, the joining method other than welding includes a fitting recess in one of the joint portions of the stator core and a fitting protrusion in the other, and the fitting recess and the fitting protrusion are provided. The part is fitted to form a cylindrical stator core. Alternatively, as in Patent Document 2, a rectangular locking piece protruding in the stacking direction of the stator core at one of the joint portions of the stator core and a rectangular hole-shaped locking in the stacking direction of the stator core at the other And a groove, and the locking piece and the locking groove are locked to form a cylindrical stator core. By this, it is possible to combine and integrate divided stator cores.
In addition, as in Patent Document 3, a convex portion and a concave portion are provided at the back yoke end of the divided stator core, and the stator iron cores divided in advance are pivotally connected by the convex portion and the concave portion. There is also known one in which stator iron cores divided by the rotation support portion are connected while forming the rotation support portion. The divided stator cores are connected to form a cylindrical shape.

JP, 2011-188650 (page 7, 8 and figures 1-6) JP 2009-118676 (pages 4 and 5, FIGS. 7 to 11) JP 2001-95181 A (pages 3, 4 and 1 to 9)

  Unevenness in the rotational speed of the motorized mechanism portion of the hermetic compressor causes noise generation and a decrease in efficiency. In order to suppress the uneven speed of the rotational speed of the motorized mechanism, it is preferable that the stator be close to a perfect circular cylinder and the teeth be aligned at equal intervals. However, when the motor-driven mechanism is installed in a closed container, it is fixed by press-fitting, welding, shrink-fitting or the like, so the stator is distorted and deformed from a perfect circular cylinder. In particular, when the stator core is divided and formed, distortion occurs at the joint. For example, since the sealed container applies a load to the stator core, the components constituting the stator core tend to move radially and circumferentially. Alternatively, expansion and contraction of the hermetic container apply a load to the stator core by heating or cooling such as welding, and the components constituting the stator core tend to move in the radial and circumferential directions. The same is true for shrink fitting. As described above, the load that the parts constituting the stator core move in the radial direction and the circumferential direction deforms the stator of the electric mechanism and generates noise and a reduction in efficiency.

  When the stator cores are divided, welding is performed to join the divided stator cores together, and the heat also deforms the stator core.

There is also a method in which divided stator cores are connected in advance so as to be rotatable and formed into a cylindrical shape. However, the portion closing the ring in a cylindrical shape must be welded, and deformation of the stator core due to the heat can not be suppressed.
Further, the rigidity with respect to the load is different between the rotatably connected connection portion and the connection portion by welding, and further, deformation from a true circle is likely to occur.

The present invention has been made to solve the above-described problems, and a plurality of divided iron cores formed by laminating a plurality of electromagnetic steel plates are connected in a circumferential direction and fixed in a cylindrical shape. The stator core is connected in a cylindrical shape without welding divided iron cores in the child , and the connection part relieves the load and stress when it is installed in a sealed container, and provides a stator core that suppresses deformation in the radial and circumferential directions. It is

A stator according to the present invention is formed by laminating a plurality of electromagnetic steel plates, and a plurality of divided iron cores having teeth and a back yoke are circumferentially connected at a connecting portion of the back yoke and configured in a cylindrical shape In the fixed stator,
The split core includes a protrusion on one of the circumferential ends of the back yoke, and a hole on the other of the circumferential ends of the back yoke,
The protrusion has an elastic force and an arc shape on the teeth side,
The hole has an arc shape on the side opposite to the side on which the protrusion is disposed,
Connecting portion, the holes of one split core, the projections of the other adjacent segment core is fitted by the elastic force of the projection, the outer circumferential surface of the circular arc shape of the projection is in contact with the inner wall of the arc shape of the holes, is engaged The arc-shaped outer peripheral surface of the projection is configured to pivot along the arc-shaped inner wall of the hole ;
The divided core connects all the connected portions of the divided core at the connecting portion, and also connects the cylindrically connected connecting portions at the connected portion.

In the stator according to the present invention, the connecting portion of the divided core is fitted in the hole of one divided core, and the projection of the other divided core adjacent thereto is inserted by the elastic force of the projection, and the arc-shaped outer peripheral surface of the projection is contact with the inner wall of the arc shape of the holes, are engaged, along the inner wall of the arc shape of the outer peripheral surface hole of the circular arc shape of the projection, and configured to rotate, all connection points of the segment core connecting portions Since the connecting portion closed in a cylindrical shape is also connected by the connecting portion while connecting at the connecting portion, the divided core can be connected and rotated at the connecting portion without welding, and can be configured in a cylindrical shape. And when it incorporates in an airtight container, the load and stress concerning a stator can be relieve | moderated by the connection part, and a deformation | transformation of the stator to radial direction and the circumferential direction can be suppressed. Thereby, the speed non-uniformity of the rotational speed of the motor for a compressor can be suppressed, and noise generation | occurrence | production and efficiency fall can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the whole of the hermetic type compressor in Embodiment 1 of this invention. It is explanatory drawing of the compression mechanism part in Embodiment 1 of this invention. It is explanatory drawing of the refrigerating circuit in Embodiment 1 of this invention. It is explanatory drawing of the electrically-driven mechanism part in Embodiment 1 of this invention. It is explanatory drawing of the split iron core of the stator in Embodiment 1 of this invention. It is explanatory drawing of the stator in Embodiment 1 of this invention. It is assembly explanatory drawing of the stator in Embodiment 1 of this invention. It is assembly explanatory drawing of the stator in Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the top view and the elements on larger scale of the electromagnetic steel plate which forms the divided iron core in Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the top view and the elements on larger scale of the electromagnetic steel plate which forms the divided iron core in Embodiment 1 of this invention. It is explanatory drawing of the division iron core in Embodiment 1 of this invention. It is the elements on larger scale of the connection part of the division iron core in Embodiment 1 of this invention. It is the elements on larger scale which show the procedure which connects the division | segmentation iron core in Embodiment 1 of this invention. It is the elements on larger scale which show the procedure which connects the division | segmentation iron core in Embodiment 1 of this invention. It is the elements on larger scale which show the procedure which connects the division | segmentation iron core in Embodiment 1 of this invention. It is the elements on larger scale which show the procedure which connects the division | segmentation iron core in Embodiment 1 of this invention. It is the elements on larger scale which show the procedure which connects the division | segmentation iron core in Embodiment 1 of this invention. It is the elements on larger scale of the other example of the connection part of the division iron core in Embodiment 1 of this invention. It is the elements on larger scale of the division iron core in Embodiment 2 of this invention. It is the elements on larger scale of the connection part of the division iron core in Embodiment 2 of this invention.

Embodiment 1
FIG. 1 is a longitudinal cross-sectional view showing the inside of a hermetic rotary compressor according to a first embodiment of the present invention, as viewed from the radial direction of a crankshaft.

  In the hermetic compressor 100, a compression mechanism unit 2 and an electric mechanism unit 3 are housed inside the hermetic container 1. The closed container 1 is composed of an upper container 11 and a lower container 12. The compression mechanism 2 is disposed at the lower part of the closed container 1, and the electric mechanism 3 is disposed at the upper part of the closed container 1. The compression mechanism 2 and the electric mechanism 3 are connected by a crankshaft 4. The compression mechanism unit 2 is rotationally driven by the electric mechanism unit 3 via the crankshaft 4. Refrigerant oil is stored in the lower part of the closed container 1 and is supplied to the sliding portion of the compression mechanism 2. Refrigerant oil is used to lubricate sliding portions of the compression mechanism 2 and seal gaps.

  The crankshaft 4 is composed of a main shaft portion 41, a countershaft portion 42 and an eccentric shaft portion 43. The crankshaft 4 is provided in the axial direction of the crankshaft 4 in the order of the main shaft portion 41, the eccentric shaft portion 43, and the sub shaft portion 42. Centers of axes of the main shaft portion 41 and the sub shaft portion 42 are provided to coincide with each other, that is, coaxially. The center of the axis of the eccentric shaft 43 is offset from the center of the axis of the main shaft 41 and the auxiliary shaft 42. Therefore, when the main shaft portion 41 and the sub shaft portion 42 rotate around the center of the shaft, the eccentric shaft portion 43 eccentrically rotates. The crankshaft 4 is rotatably supported by two bearings.

The compression mechanism 2 will be described with reference to FIGS. 1 and 2.
The compression mechanism portion 2 is configured of a cylinder 21, a rolling piston 22, a main bearing 23, a sub bearing 24, and a vane 25. The cylinder 21 is provided with a cylindrical internal space, that is, a cylinder chamber 26. Both axial ends of the cylinder chamber 26 are open to the outside of the cylinder 21. A main bearing 23 is attached to one opening of the cylinder chamber 26. And the main bearing 23 has closed the opening part. An auxiliary bearing 24 is attached to the other opening of the cylinder chamber 26. And the sub bearing 24 has closed the opening part. The main bearing 23 and the sub bearing 24 are fixed to the cylinder 21 by bolts or the like. The eccentric shaft portion 43 of the crankshaft 4, the rolling piston 22, and the vanes 25 are accommodated in the cylinder chamber 26.

FIG. 2 is a cross-sectional view of the compression mechanism 2 cut along a plane perpendicular to the crankshaft 4.
In the cylinder 21, vane grooves 27 are provided in the radial direction from the center of the cylinder chamber 26. The vane groove 27 is open to the cylinder chamber 26. The vanes 27 are accommodated in the vane grooves 27.

  The vanes 25 have a substantially rectangular parallelepiped shape. A back pressure chamber 28 is provided on the side of the vane groove 27 opposite to the opening of the cylinder chamber 26. The back pressure chamber 28 is provided with a spring. One of the springs is in contact with the end face of the vane. The vanes 25 are pushed out of the vane groove 27 into the cylinder chamber 26 by the spring. The tip end of the vane 25 is in contact with and pressed against the outer peripheral surface of the rolling piston 22. Thus, the space formed by the inner peripheral surface of the inner diameter of the cylinder chamber 26, the outer peripheral surface of the outer diameter of the rolling piston 22, the main bearing 23, and the sub bearing 24 is two working chambers by the vanes 25. It is divided into

The rolling piston 22 is ring-shaped and is rotatably mounted on the eccentric shaft 43. The rolling piston 22 is eccentrically rotated in the cylinder chamber 26 together with the eccentric shaft 43 by rotation of the crankshaft 4. Thus, the vanes 25 in contact with the rolling piston 22 reciprocate in the vane grooves 27.
In addition, although the rolling piston 22 and the vane 25 were demonstrated separately, they may be integral and operation | movement is also substantially the same.

  Each of the main bearing 23 and the auxiliary bearing 24 is formed of a cylindrical bearing portion and a flat plate end plate portion which is orthogonal to the bearing portion. The main shaft portion 41 of the crankshaft 4 is inserted into the bearing portion of the main bearing 23. The bearing portion of the main bearing 23 supports the main shaft portion 41. The sub shaft portion 42 of the crankshaft 4 is inserted into the bearing portion of the sub bearing 24. The bearing portion of the auxiliary bearing 24 supports the auxiliary shaft portion 42. The end plate portion of the main bearing 23 is closed at one opening of the cylinder chamber 26. The end plate portion of the auxiliary bearing 24 is closed at the other opening of the cylinder chamber 26.

  The cylinder 21 is provided with a flow passage communicating with the outside of the sealed container 1 and the cylinder chamber 26, that is, a suction port. In general, the suction port is a hole provided in the cylinder 21. The suction port communicates with one working chamber obtained by dividing the cylinder chamber 26 by the vanes 25. The cylinder 21 sucks the refrigerant gas into the one working chamber from the outside of the closed container 1 by the suction port.

  Further, the cylinder 21 is provided with a flow passage communicating with the outside of the cylinder 21 and the cylinder chamber 26, that is, a discharge port. Generally, the discharge port is also a hole provided in the cylinder 21. The discharge port communicates with the other working chamber that divides the cylinder chamber 26 by the vane 25. The main bearing 23 is provided with a channel communicating with the discharge port and an opening, that is, a discharge port. The discharge port communicates the working chamber of the cylinder 21 with the external space of the cylinder 21 via the discharge port. A discharge valve is provided at the discharge port. The discharge valve closes until the refrigerant in the working chamber reaches a predetermined pressure, and opens when the refrigerant in the working chamber reaches a predetermined pressure or more.

  The main bearing 23 is provided with a discharge muffler 29 that covers the main bearing 23. The discharge muffler 29 is attached to the main bearing 23 by a bolt or the like. A space, that is, a muffler chamber is provided between the main bearing 23 and the discharge muffler 29. The refrigerant gas discharged from the discharge port of the main bearing 23 diffuses into the muffler chamber. By diffusing the refrigerant gas compressed in the cylinder 21 once into the muffler chamber, the discharge noise is suppressed. When the discharge port is in the sub bearing 24, the discharge muffler 29 is also provided in the sub bearing 24. Moreover, when both have a discharge port, it is provided in both the main bearing 23 and the sub bearing 24. As shown in FIG.

  The discharge muffler 29 is provided with an opening 30. The opening 30 communicates the muffler chamber with the space between the discharge muffler 29 and the closed container 1. Thus, the refrigerant gas compressed in the cylinder chamber 26 is discharged into the closed container 1 through the discharge muffler 29.

The refrigerant gas discharged from the discharge muffler 29 into the closed container 1 is sent to the upper side of the closed container 1. At that time, the refrigerant gas passes through the air gap of the electric mechanism portion 3 . A discharge pipe 5 is provided in the upper container 11 of the closed container 1. A refrigerant circuit provided outside the closed container 1 is connected to the discharge pipe 5. The refrigerant gas compressed by the compression mechanism portion 2 is discharged from the discharge pipe 5 to a refrigerant circuit outside the closed container 1.

  An intake muffler 101 is provided outside the closed container 1. The suction muffler 101 and the suction port of the cylinder 21 are connected by a suction pipe 6. The suction muffler 101 is connected via a pipe 102 to a refrigerant circuit provided outside the closed container 1. The suction muffler 101 is hollow inside. The hollow space is in communication with the pipe 102 and the suction pipe 6. The refrigerant gas sucked from the pipe 102 is diffused into the hollow space of the suction muffler 101, and only the refrigerant gas is sucked from the suction pipe 6 into the cylinder 21. Thereby, the liquid refrigerant is separated from the refrigerant gas, and only the refrigerant gas is drawn into the cylinder 21.

When the hermetic compressor 100 is applied to an air conditioner, the condenser 103, the expansion valve 104, and the evaporator 105 are provided outside the hermetic compressor 100 to form a refrigeration circuit. It is shown in FIG. That is, in the air conditioner, the discharge pipe 5 of the hermetic compressor 100 is connected to the suction muffler 101 through the condenser 103, the expansion valve 104, and the evaporator 105. The discharge pipe 5, the condenser 103, the expansion valve 104, the evaporator 105, and the suction muffler 101 are respectively connected by pipes. The piping is a copper pipe. A refrigerant circulates in this circuit. The refrigerant exchanges heat with air, water, and the like in the condenser 103 and the evaporator 105 to absorb heat and release heat. That is, the refrigerant that has absorbed heat in the evaporator 105 is carried to the condenser 103 and dissipated in the condenser 103. The refrigerant released by the condenser 103 is conveyed to the evaporator 105 and is again absorbed. By circulating in the circuit in this manner, thermal energy is transferred.
Reference numeral 106 denotes a four-way valve, which reverses the route through which the refrigerant circulates. That is, the refrigerant coming out of the hermetic compressor 100 flows in the order of the condenser 103, the expansion valve 104, the evaporator 105, and the suction muffler 101, and returns to the hermetic compressor 100 by the four-way valve 106. The refrigerant that has exited from the machine 100 flows in the order of the evaporator 105, the expansion valve 104, the condenser 103, and the suction muffler 101, and switches back to the hermetic compressor 100. The air conditioner reverses the transfer of thermal energy to switch between cooling and heating. When the route is reversed, the function of the condenser 103 is an evaporator, and the function of the evaporator 105 is a condenser.

Next, the operation of the compression mechanism unit 2 will be described.
First, low-pressure low-temperature refrigerant gas is drawn into the working chamber in communication with the suction port. The working chamber which has sucked the refrigerant gas moves in the cylinder chamber 26 by the eccentric rotation of the rolling piston 22, that is, the eccentric shaft 43, and the communication with the suction port is broken. Furthermore, as the rolling piston 22 eccentrically rotates, the volume of the working chamber is reduced, and the sucked refrigerant gas is compressed. As the eccentric rotation of the rolling piston 22 progresses, the working chamber and the discharge port communicate with each other. The working chamber and the discharge port communicate with each other, and when the refrigerant gas reaches a predetermined pressure, the discharge valve closing the discharge port opens. When the discharge port is opened, the high pressure and high temperature refrigerant gas in the working chamber is discharged into the discharge muffler 29 through the discharge port. The refrigerant gas discharged into the discharge muffler 29 is discharged from the discharge muffler 29 into the closed container 1. When the rolling piston 22 eccentrically rotates, the communication with the discharge port is cut off, and the communication with the suction port is performed again. A series of operations are performed while the rolling piston 22 makes one revolution in the cylinder chamber 26. When one of the two working chambers provided by the vanes 25 sucks the refrigerant gas, the other operates to discharge the refrigerant gas. Therefore, the working chamber sandwiches the vane 25, the working chamber communicating with the suction port and sucking the low pressure refrigerant gas is the suction chamber of the low pressure space, and the working chamber communicating with the discharge port and discharging the high pressure refrigerant gas It becomes a compression chamber of high pressure space.

Next, the motor-driven mechanism 3 will be described with reference to FIGS. 1 and 4. The rotational force of the rolling piston 22, that is, the crankshaft 4 is obtained from the electric mechanism unit 3.
The electric mechanism portion 3 is configured of a rotor 31 and a stator 32 provided so as to surround the outer side of the rotor 31.

  The rotor 31 has a cylindrical shape and is fixed to the main shaft portion 41 of the crankshaft 4. The rotor 31 is composed of a rotor core 31a. The rotor core 31 a is formed by stacking thin electromagnetic steel plates in the axial direction of the crankshaft 4. The magnetic steel sheet has a thickness of 0.1 mm to 1.5 mm. Magnetic steel sheets are mainly made of iron. The rotor core 31a is formed by punching the magnetic steel sheets in a predetermined shape and stacking a plurality of sheets in the axial direction. The stacked electromagnetic steel sheets are fixed by caulking or welding.

  An upper balance weight 31b is provided above the rotor core 31a, and a lower balance weight 31c is provided below the rotor core 31a. The upper balance weight 31 b and the lower balance weight 31 c are provided in order to cancel the load when the eccentric shaft 43 of the crankshaft 4 eccentrically rotates. The upper balance weight 31b, the lower balance weight 31c, and the rotor core 31a are fixed by rivets 31d. The rotor core 31a is provided with a rivet hole penetrating in the axial direction. The upper balance weight 31 b and the lower balance weight 31 c are also provided with rivet holes. The rivets 31 d are inserted and fixed in these rivet holes. When the eccentric shaft portion 43 of the crankshaft 4 eccentrically rotates and the load is small and there is no need to cancel it, an end plate is attached instead of the upper balance weight 31 b and the lower balance weight 31 c. .

  The rotor 31 has an axially penetrating shaft hole on the central axis of the rotor 31. The main shaft portion 41 of the crankshaft 4 is inserted into a shaft hole of the rotor 31 and fixed.

  The rotor 31 has a different structure depending on the type of the motorized mechanism 3. For example, a DC motor has a permanent magnet, and an AC motor has a secondary winding. 1 and 4 are examples of DC motors.

FIG. 4 is a cross-sectional view of the electric mechanism 3 cut along a plane perpendicular to the crankshaft 4.
In the case of a DC motor, the rotor 31 is provided with an axially penetrating magnet hole so as to surround the shaft hole. The permanent magnet 31e is inserted and fixed in the magnet hole. Generally, an even number of magnet holes and permanent magnets 31e are provided. Further, the magnet hole and the permanent magnet 31 e are provided in the outer peripheral portion in the radial direction of the rotor 31, that is, in the vicinity of the outer peripheral surface in the radial direction of the rotor 31. A ferrite magnet or a rare earth magnet is used for the permanent magnet 31e. The magnet shape is, for example, a circular arc shape or a flat plate shape in accordance with the characteristics of the material. Also, although the structure having the magnet hole has been described, there is also a structure in which the magnet is bonded and fixed to the outer peripheral surface of the rotor 31 in the radial direction.
The rotor 31 of the DC motor generates a magnetic flux by the permanent magnet 31e.

Although not shown, in the case of an AC motor, a secondary winding is provided on the stator. The secondary winding is composed of a plurality of columnar conductive materials penetrating in the axial direction and a ring-shaped conductive material connecting the plurality of conductive materials at the end face in the axial direction. The columnar conductive material and the ring-shaped conductive material are integrally formed of aluminum. The generated secondary winding has a weir-like shape. The upper balance weight 31 b and the lower balance weight 31 c are fixed to the end face of the ring-shaped conductive portion.
The rotor of the AC motor generates a magnetic flux due to the induced current generated in the secondary winding.

  In any case, the rotor 31 rotates around the central axis, that is, the crankshaft 4 by the magnetic flux generated by the stator 32 and the magnetic flux generated by the rotor 31.

  Further, in the case of the motor-driven mechanism portion 3 for a compressor, a communication hole 31 f penetrating in the axial direction is provided between the magnet hole and the shaft hole or between the secondary winding and the shaft hole. The refrigerant gas discharged from the discharge muffler 29 is led to the discharge pipe 5 using the gap between the rotor 31 and the stator 32, the gap between the windings of the stator 32, and the communication hole 31f.

  Refrigerant oil stored in the lower part of the closed container 1 is contained and dissolved in the refrigerant gas discharged from the compression mechanism section 2. If the refrigerant oil is discharged to the outside of the closed container 1 with the refrigerant oil dissolved in the refrigerant gas, the refrigerator oil in the closed container 1 is depleted, and the compressor oil is not supplied to the compression mechanism unit 2. If the refrigeration oil is not supplied to the compression mechanism portion 2, the seal of the gap of the compression mechanism portion 2 is insufficient, the refrigerant gas leaks, the lubricity of the sliding portion of the compression mechanism portion 2 decreases, and a failure occurs. To Therefore, refrigeration oil is separated from the refrigerant gas and returned to the lower part of the closed container.

  As shown in FIG. 1, an oil separation plate 31 g is provided between the opening of the communication hole 31 f and the discharge pipe 5. The oil separating plate 31 g is fixed to the crankshaft 4. A shaft hole is provided at the center of the oil separation plate 31g. The main shaft 41 of the crankshaft 4 is inserted into the shaft hole and fixed. The oil separation plate 31 g is a flat plate, and generally has a disk shape. However, it may be square or polygonal. The disk-like portion of the oil separation plate 31g is extended and fixed so as to cover the axial upper side of the opening of the communication hole 31f. The refrigerant gas sucked from one of the communication holes 31f is discharged from the other and collides with the oil separation plate 31g.

  Since the gap other than the communication hole 31 f is narrow, the refrigerant gas passing through the gap has a slower flow velocity than the communication hole 31 f. Therefore, the refrigerant gas and the refrigerator oil are separated while passing through the gap. On the other hand, the flow rate of the refrigerant gas passing through the communication hole 31f is faster than the gap other than the communication hole 31f. Therefore, it passes through the communication hole 31 f before it is separated into the refrigerant gas and the refrigerator oil. The refrigerant gas is discharged from the communication hole 31f. When the refrigerant gas is sent out from the discharge pipe 5 as it is, the refrigerator oil is carried out of the closed container 1. However, the refrigerant gas discharged from the communication hole 31 f collides with the oil separation plate 31 g. The refrigerant gas is separated into the refrigerant gas and the refrigerator oil by colliding with the oil separation plate 31g. When separated, the refrigerant gas with a light specific gravity flows upward, and the refrigeration oil with a heavy specific gravity is returned downward. By such an operation, the oil separation plate 31 g suppresses the amount of refrigeration oil being carried out of the closed container 1.

  The stator 32 is generally cylindrical as shown in FIG. 4 and includes a rotor 31 inside. The rotor 31 and the stator 32 are installed via an air gap of 0.3 mm to 1.0 mm. Similar to the rotor 31, the stator 32 is composed of a stator iron core 32 a in which thin electromagnetic steel plates are stacked in the axial direction of the crankshaft 4.

  The stator core 32a is composed of a back yoke 32b forming a cylindrical portion of the outer edge, and a plurality of teeth 32c provided inside the back yoke 32b. The teeth 32 c extend toward the central axis of the stator core 32 a, that is, the crankshaft 4. The tip extends in a reverse arc shape so as to face the outer peripheral surface of the rotor. A slot 32e occupied by the stator winding 32d is formed between the teeth 32c and the teeth 32c.

  A stator winding 32d is wound around the teeth 32c via an insulating member 32f. The winding method of the stator winding 32 d includes concentrated winding method and distributed winding method. The concentrated winding method is a structure and method in which the stator winding 32 d is wound for each tooth 32 c. One pole is formed on one tooth 32c. The distributed winding is a configuration in which the stator winding 32d is wound around a plurality of teeth 32c. A plurality of teeth 32c form one magnetic pole. The system shown in FIG. 4 is a concentrated winding system. The concentrated winding method will be described as an example.

  The stator winding 32d is composed of a core wire and at least one layer of coating covering the core wire. The material of the core wire is mainly copper, but may be aluminum. The material of the film is AI (amide imide) / EI (ester imide). The stator 32 generates a magnetic flux for each tooth 32c by passing a current through the stator winding 32d.

  The insulating member 32 f insulates the stator core 32 a mainly made of iron and the stator winding 32 d made of copper. Between the stator core 32a and the stator winding 32d, a refrigerant having a dielectric constant lower than that of the refrigerator oil passes through in the vacuum, so that the dielectric constant is lowered. The higher the density of the refrigerant, the lower the dielectric constant. The decrease in dielectric constant causes an increase in leakage current when current flows in the stator winding 32d. Therefore, the insulating member 32f is disposed between the stator core 32a and the stator winding 32d. The material of the insulating member 32f is PET (polyethylene terephthalate), PBT (polybutylene terephthalate), FEP (tetrafluoroethylene-hexafluoropropylene copolymer), PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer), PTFE (Polytetrafluoroethylene), LCP (liquid crystal polymer), PPS (polyphenylene sulfide), or a phenol resin is used.

  The insulating member 32f in the slot 32e may use a film material. The axial cross sectional area of the slots 32e is limited. On the other hand, in order to lower the electric resistance of the stator winding 32d and to increase the efficiency of the electric mechanism 3, it is necessary to widen the wire diameter of the stator winding 32d and to widen the cross-sectional area. Therefore, it is advantageous that the thickness of the insulating member 32f be thin when passing the stator winding 32d having a large wire diameter as much as possible during the axial cross-sectional area of the slot 32e. A film material that can be thinned by the insulating member 32 f is used. As the film material, an insulating film composed of a low oligomer film such as PET (polyethylene terephthalate) or PPS (polyphenylene sulfide) having a small amount of oligomer extraction is used. Oligomer refers to a relatively low molecular weight polymer to which a finite number (generally 10 to 100) of monomers are linked. The oligomer extraction amount by the chloroform extraction amount for 20 hours of the insulating film is preferably 1.5% or less. The thickness of the insulating film is preferably 0.2 mm or less.

The insulating member 32f is provided with a constraining portion that restrains the end of the stator winding 32d. In the state where the insulating member 32f is attached to the stator core 32a, the restraint portion is disposed at the end face in the axial direction. The restraint portion is provided in the same number as the teeth 32c, and is disposed on an axial end face of the back yoke 32b connected to the teeth 32c. A restraint groove is provided in the restraint portion. One of the ends of the stator winding 32d wound around the teeth 32c is restrained in the restraining groove. The other end of the stator winding 32d is restrained in the restraining groove of another restraining portion from the restraining portion in which one of the ends of the stator winding 32d is restrained. Thus, the stator winding 32d wound around the teeth 32c is temporarily locked to the restraint portion.
In addition to the end of the stator winding 32d, the crossover wire and the lead wire 33 are also restrained in the restraining groove of the restraining portion. The pressure contact terminal is incorporated in the restraint portion. Grooves are provided also in the pressure contact terminals, and the grooves are structured to sandwich the respective lines. The pressure contact terminal is made of a conductive metal such as brass. Then, the stator winding 32d, the crossover wire, and the lead wire 33 are electrically connected. That is, the stator winding 32 d is connected to the crossover wire and the lead wire 33 via the restraint portion and the press contact terminal incorporated in the restraint portion.

  The crossover wire connects one stator winding 32d to another stator winding 32d. For example, in the case of a three-phase motor, windings of three groups (phases) are formed. When there are six teeth portions 32c, two windings constitute one group. A crossover wire connects the stator windings 32d. Also, one of the windings forming the three groups is connected to the power supply through the lead wire 33, while the other is also coupled to all three to form a neutral point. Also in that case, a crossover is used.

  The lead wire 33 is connected to a terminal connected to an external power supply of the sealed container 1. A terminal 34 is provided on the upper container 11 of the closed container 1. The lead 33 is connected to its terminal 34. The terminal 34 may be provided to the lower container 12.

  The terminal 34 is connected to a power supply provided outside the hermetic compressor, such as an inverter device. The power is supplied from the power supply to the motorized mechanism 3 to operate the motorized mechanism 3. That is, the stator 32 generates a magnetic flux, and the rotor 31 performs rotational motion. Then, the compression mechanism unit 2 is driven via the crankshaft 4.

The electric mechanism unit 3 is configured as described above. However, because the stator 32 has a structure in which the teeth 32c are extended toward the central axis, a space for winding the stator winding 32d and a winding jig do not contact or interfere with the stator. Run out of space to As a solution method, there is a manufacturing method using a divided core in the stator core 32a.
The manufacturing method using a divided core is a method of dividing a cylindrical stator core with a back yoke, winding a stator winding around teeth, and then joining the back yoke to form a cylinder. is there. The number of divisions is not limited to the number of teeth, and any number may be used.

The structure of the divided core of the stator core 32a will be described with reference to FIG.
Divided core 60 of FIG. 5 is a view seen from a direction corresponding to the axial direction when assembled on cylindrical stator core 32a. The axial direction refers to the axial direction of the rotor 31, that is, the axial direction of the crankshaft 4 when the stator core 32 a is assembled as the motorized mechanism 3. Divided iron core 60 has a T-shape, and is constituted of one tooth 32c and back yoke 32b connected to tooth 32c. The back yoke 32b has an arc shape. The teeth 32 c are provided substantially at right angles with the back yoke 32 b at the center of the back yoke 32 b. The teeth 32 c extend toward the center of the arc shape of the back yoke 32 b and are provided. When the split core 60 is assembled to the stator core 32a, the back yoke 32b is annular or cylindrical, and the teeth 32c face the center of the ring. The tip of the teeth 32 c, that is, the portion of the teeth 32 c opposite to the back yoke 32 b is a surface facing the rotor 31. The surface extends in a reverse arc along the outer peripheral surface of the rotor 31. Further, the back yoke 32b constitutes an outer peripheral portion of the cylindrical outer diameter of the stator core 32a. Therefore, the portion in contact with the closed container 1 to be described later is the back yoke 32 b.

  When the split iron core 60 is formed, the thin magnetic steel plates are stacked and crimped in the stacking direction to fix the magnetic steel plates together. 61 is a caulking.

  An insulating member 32 f is fixed to an axial end face of the core segment 60. The insulating member 32 f is provided with a protrusion that locks onto the core segment 60. A hole 62 is provided on the axial end face of the core segment 60. The projection provided on the insulating member 32f is inserted into the hole 62 of the core segment 60 and locked.

  Divided core 60 has end faces 63, 64 of back yoke 32b in a direction perpendicular to teeth 32c, that is, in the circumferential direction of back yoke 32b. The split iron core 60 is wound around the teeth 32 c and then welded at the end faces 63 and 64 of the back yoke 32 b to join the split iron cores 60 together.

However, since stator core 32a joins a plurality of core segments 60, there are many operations and processes, such as annular alignment of core segments 60 around which stator winding 32d is wound. In addition, when the ring is aligned, the core segments 60 often shift in the radial direction. The annular alignment operation requires a very high level of technology.
Therefore, there is a method of winding the stator winding 32d after connecting the divided iron cores 60 in advance.

  FIG. 6 shows the iron cores connected in divided iron cores and aligned in a chain. The divided core 60 extends a part of the electromagnetic steel sheet constituting the back yoke 32b in the circumferential direction so that it can be overlapped with a part of the electromagnetic steel sheet of the back yoke 32b of the adjacent divided core. The overlapping portion strikes a rivet or the like in the stacking direction of the magnetic steel plates and rotatably engages. Thereby, adjacent divided iron cores can be connected. The engaging portion is the connecting portion 65. When the split iron core 60 connected is rotated about the connecting portion 65, the end faces 63 and 64 of the back yoke 32b are brought into contact or pressed, and the rotation is restrained.

  When the stator winding 32d is wound, as shown in FIG. 6, the stator winding 32d is wound around the teeth 32c in a state where the divided iron cores 60 are aligned in a line. Thereby, the stator winding 32d can be wound without causing contact or interference with the stator of the winding jig. After winding the stator winding 32d around the teeth 32c, the stator core 32a is rotated about each connection portion 65 as shown in FIG. 7 to form the divided core 60 in an annular shape. The final joining surfaces 66A, 66B for closing the ring are joined by welding. An insulating member 32 f is attached to the core segment 60. Since the insulating member 32f is disposed on the end face of the divided iron core 60 in the stacking direction of the electromagnetic steel sheets, the insulating member 32f is also disposed on the end face of the connecting portion in the stacking direction of the electromagnetic steel sheets. Therefore, since the insulating member 32f blocks the direction in which the rivets are inserted into the connecting portion, it is difficult to join the rivets in the stacking direction of the magnetic steel sheets after winding the stator winding 32d. Therefore, it is common to join by welding.

FIG. 8 shows a state of the stator core 32a in which the divided cores 60 are joined to each other, and is formed in an annular shape.
The stator core 32 a formed annularly is pressed into the closed container 1. Thereafter, the stator core 32a is welded to the closed container 1 and fixed. That is, the stator core 32 a is fixed to the inner wall of the closed container 1. A protrusion is provided on the outer peripheral surface of the outer diameter of the stator core 32a. The projections and the inner wall of the sealed container 1 are in contact with each other and fixed. Therefore, a gap is provided between the inner wall of the sealed container 1 and the outer peripheral surface of the outer diameter of the stator core 32a. Thereby, the influence of the deformation of the closed container 1 is mitigated.

  Unevenness in the rotational speed of the motorized mechanism 3 causes noise generation and a drop in efficiency. In order to suppress speed unevenness to the rotational speed of the electric mechanism 3, it is better that the stator core 32a has a section perpendicular to the axial direction close to a perfect circle and the teeth 32c aligned at equal intervals. However, since stator iron core 32a joins divided iron cores 60 by welding, deformation due to heat occurs. Furthermore, when fixed to the closed container 1, the stator core 32a is deformed by a load generated by press-fitting, welding, shrink-fitting or the like. For example, in the case where the stator 32 is pressed into the closed container 1, the stator core 32 a is subjected to a load to be tightened by the closed container 1. Further, even when the stator 32 is welded to the closed vessel 1, the stator core 32a receives a load due to the thermal expansion and contraction of the closed vessel 1. The same is true for shrink fitting. In the compressor, since the high-pressure and high-temperature refrigerant gas passes through the motorized mechanism portion 3, the closed container 1 and the motorized mechanism portion 3 also receive the heat action, and the stator core 32a receives a load. These loads tend to move the core segment 60 radially and circumferentially, causing distortion and deformation, and the stator core 32a deforms from a true circle.

  Even when the split iron cores are connected in advance, the joint portion 66 is welded, so the heat action causes deformation from a true circle. In addition, in the stator core 32a in which the split iron cores are connected in advance, deformation or distortion occurs due to the difference in rigidity between the connecting portion 65 and the joint portion 66. The connecting portion 65 can move, but the connecting portion 66 can not move. Therefore, when a load is applied to the stator core 32a, the split iron core 60 tries to move radially and circumferentially, and the stator core 32a starts from a perfect circle. Deform.

  Therefore, in the present embodiment, the load when connecting all the joints of the divided iron cores together at the pivotable connection without welding all the joints and assembling the stator iron core 32a into the closed container 1 at the connection. And a structure that relieves stress. That is, even if the direction in which the insulating member 32f inserts the rivet into the connecting portion is blocked, the connecting portion is configured to be connectable. 9, 10, 11, 12 illustrate the details of the connection structure.

It demonstrates from the structure of the electromagnetic steel plate of the division iron core 60 in a figure.
The divided core 60 is configured by stacking a first type of electromagnetic steel sheet 71 and a second type of electromagnetic steel sheet 72. That is, they are stacked in the axial direction when the stator core 32a is formed. The electromagnetic steel sheet 71 of the first type and the electromagnetic steel sheet 72 of the second type have a T-shape in a plan view seen from the direction perpendicular to the electromagnetic steel sheet, that is, the stacking direction. Respectively, it comprises divided iron core 60, a part which forms back yoke 32b of circular arc shape similarly, and a part which forms teeth 32c provided substantially at right angles to the center of back yoke 32b. The split core 60 has a structure in which a first type of electromagnetic steel plates 71 and a second type of electromagnetic steel plates 72 are alternately stacked and arranged.
FIG. 9 shows the overall shape of the first type of electromagnetic steel sheet 71, and also shows the connecting portion of the first type of electromagnetic steel sheet 71 in an enlarged manner. The third of four stages in FIG. 9 is a plan view of the whole of the first type of electromagnetic steel sheet 71 as viewed from the direction perpendicular to the electromagnetic steel sheet, and the fourth of the fourth type is that of the first type. The back yoke portion of the magnetic steel plate 71 is a cross section obtained by cutting the back yoke in the circumferential direction of the back yoke and in the direction perpendicular to the magnetic steel plate. The second stage is an enlarged view of the connection portion of the first type of magnetic steel plate 71 in a plan view seen from the direction perpendicular to the magnetic steel plate, and the first stage is an enlarged portion of the second stage. Is a cross section obtained by cutting the back yoke in the circumferential direction and perpendicular to the magnetic steel sheet.
FIG. 10 shows the overall shape of the second type of electromagnetic steel sheet 72, and also shows an enlarged view of the connecting portion of the second type of electromagnetic steel sheet 72. As shown in FIG. Similar to FIG. 9, FIG. 10 also shows the third of four stages in plan view of the whole of the electromagnetic steel sheet 72 of the second type viewed from the direction perpendicular to the electromagnetic steel, and the fourth is The back yoke part of the magnetic steel plate 72 of a 2nd type is a cross section which cut | disconnected the circumferential direction of a back yoke, and the orthogonal | vertical direction with respect to a magnetic steel plate. The second stage is an enlarged view of the connection portion of the second type magnetic steel sheet 72 in a plan view seen from the direction perpendicular to the magnetic steel sheet, and the first stage is an enlarged portion of the second stage Is a cross section obtained by cutting the back yoke in the circumferential direction and perpendicular to the magnetic steel sheet.
FIG. 11 shows a stack of a first type of electromagnetic steel sheet 71 and a second type of electromagnetic steel sheet 72, and shows the whole of the divided core. The upper part of FIG. 11 is a plan view of the whole divided core viewed in a direction perpendicular to the magnetic steel sheet, and the lower part is a circumferential direction of the back yoke of the divided core and a perpendicular direction to the magnetic steel sheet. Is a sectional view taken along the line. The cross section shows only one electromagnetic steel sheet 71 of the first type and one electromagnetic steel sheet 72 of the second type for convenience of explanation, and the divided iron cores are plural iron steel sheets of each type. , Stacked and configured.
FIG. 12 shows the connection of the first type of electromagnetic steel sheet 71 and the second type of electromagnetic steel sheet 72 in arbitrary four consecutive layers L1 to L4 of the split iron core. FIG. 12 is a plan view seen from the direction perpendicular to the magnetic steel sheet, as in the enlarged portions in FIGS. Although it is desirable that the number of laminations of the first type electromagnetic steel sheet 71 and the second type electromagnetic steel sheet 72 is more than four, here, for convenience of explanation, only four layers L1 to L4 are shown. .
9, 10, 11, 12 show the first divided electromagnetic steel sheet 71, the second electromagnetic steel sheet 72, and the laminate thereof, which are adjacent to each other. For convenience, in the figure, the left magnetic steel plates (71, 72) are stacked and the split iron core formed on the left is stacked on the first split iron core 60A and the right magnetic steel plates (71, 72) are formed on the right Will be described as a second split iron core 60B. Further, the right side enlarged portion of the first type electromagnetic steel plate 71 will be described as the electromagnetic steel plate 73, and the right side enlarged portion of the second type electromagnetic steel plate 72 as the electromagnetic steel plate 74. Similarly, the left side expanded portion of the second type electromagnetic steel plate 72 will be described as the electromagnetic steel plate 75, and the left side expanded portion of the first type electromagnetic steel plate 71 as the electromagnetic steel plate 76. Therefore, in the figure, the part disposed on the left side of the enlarged view is a partial enlarged view of the end on the right side of back yoke 32b of first split core 60A, and the part disposed on the right side of the enlarged view is a second split core 60B is a partially enlarged view of the left end of the back yoke 32b of 60B. FIG. The first split iron core 60A and the second split iron core 60B are distinctions for convenience of explanation, and are adjacent same split iron cores.

  The electromagnetic steel plate 73 has a laminated portion 3A overlapping the electromagnetic steel plate 74, and a projecting portion 3B protruding outward in the circumferential direction of the back yoke 32b relative to the electromagnetic steel plate 74. The holes 81 are provided in the projecting part 3B which is protruding. When the split iron core 60A and the split iron core 60B are connected, the split iron core is connected with the end 3C of the tip protruding outward in the circumferential direction of the back yoke 32b relative to the electromagnetic steel plate 74 of the electromagnetic steel plate 73 of the split iron core 60A. Adjacent to the end 6C of the 60B electrical steel sheet 76.

  The hole 81 of the electromagnetic steel plate 73 has a fan-shaped cross section perpendicular to the perpendicular direction to the electromagnetic steel plate 73. The inner wall 81A on the inner peripheral side of the arc-shaped back yoke 32b of the hole 81 and the inner wall 81B on the outer peripheral side of the arc-shaped back yoke 32b of the hole 81 constitute a fan-shaped linear portion. That is, it is a linear surface in a plan view seen from the direction perpendicular to the magnetic steel plate 73. The inner wall 81C on the end 3C side of the hole 81 constitutes a fan-shaped arc portion. That is, it is an arc-shaped surface in a plan view seen from the direction perpendicular to the magnetic steel plate 73. The end 3C side is the side opposite to the side on which the magnetic steel plates 74 are stacked. The opposite side to the end 3C of the hole 81, that is, the inner wall on the electromagnetic steel plate 74 side may have any shape. In the present embodiment, the inner wall is formed of an arc-shaped surface in a plan view seen from the direction perpendicular to the magnetic steel plate 73.

  The electromagnetic steel plate 75 has a laminated portion 5A overlapping the electromagnetic steel plate 76, and a projecting portion 5B protruding outward in the circumferential direction of the back yoke 32b relative to the electromagnetic steel plate 76. The projections 82 are provided on the protruding projecting portion 5B. When the split iron core 60A and the split iron core 60B are connected, the split iron core is connected with the end 5C of the tip that protrudes outward in the circumferential direction of the back yoke 32b relative to the electromagnetic steel plate 76 of the electromagnetic steel plate 75 of the split iron core 60B. Adjacent to the end 4C of the 60A electromagnetic steel plate 74.

The projections 82 of the electromagnetic steel plates 75 protrude in the direction in which the electromagnetic steel plates are stacked, that is, perpendicular to the electromagnetic steel plates 75, and have elasticity. The protrusion 82 has a shape in which the electromagnetic steel plate 76 side protrudes from the electromagnetic steel plate 74 side. That is, there is an inclination in the direction of the electromagnetic steel plate 76 from the side of the electromagnetic steel plate 74. The outer peripheral surface 82A on the inner peripheral side of the arc-shaped back yoke 32b of the projection 82 and the outer peripheral surface 82B on the outer peripheral side of the arc-shaped back yoke 32b of the projection 82 face each other and are substantially parallel. And it is a straight surface by plane view seen from perpendicular to the electromagnetic steel plate 75. The outer peripheral surface 82C of the side where the electromagnetic steel plates 76 of the protrusions 82 are stacked, compared electrical steel plate 75 is a circular arc shape in a plan view as viewed from a vertical direction. The side on which the electromagnetic steel plates 76 are stacked means the side on which the teeth 32 c are disposed.
Therefore, the outer peripheral surface 82C of the projection 82 is an outer peripheral surface on the side where the hole 81 is disposed, and the inner wall 81C of the hole 81 is an inner wall on the opposite side to the side where the projection 82 is disposed.
The arc shape of the outer peripheral surface 82C of the projection 82 is the same radius as the inner wall 81C of the hole 81, and the same shape. That is, the radius of the arc shape of the outer peripheral surface 82C of the projection 82 and the radius of the arc shape of the inner wall 81C of the hole 81 coincide with each other. The protrusions 82 may be formed by any method, but in the present embodiment, they are formed by cutting and raising a part of the magnetic steel plate 75.

  According to the above configuration, split iron core 60A is provided with hole 81 at one end of back yoke 32b. The core segment 60B has a projection 82 at one end of the back yoke 32b. Since divided cores 60A and 60B are distinguished for convenience of explanation, divided cores 60A and 60B, that is, divided core 60 have holes 81 at one end of back yoke 32b and projections 82 at the other end. It is the composition provided with

  When the split iron core 60A and the split iron core 60B are connected, the projection 82 of the electromagnetic steel plate 72 is fitted in the hole 81 of the electromagnetic steel plate 71. Thereby, the divided iron cores 60 are engaged with each other by the same number of projections 82 as the number of electromagnetic steel plates 72 in at least the direction in which the projections 82 project. Therefore, as the number of the protrusions 82 increases, the engagement force between the divided iron cores 60 becomes stronger. The protrusion 82 is fitted in the hole 81 to form a connecting portion between the split iron core 60A and the split iron core 60B.

The shape of the hole 81 and the shape of the protrusion 82 will be described.
Assuming that the fan-shaped center of the hole 81 is P, the center P is closer to the electromagnetic steel plate 74 than the hole 81. The inner wall 81C of the hole 81 is formed in an arc shape centering on P. The outer peripheral surface 82C of the projection 82 is formed in an arc shape drawn with the same radius as the center P to the inner wall 81C of the hole 81. When the protrusion 82 is fitted into the hole 81, the outer peripheral surface 82C of the protrusion 82 is arranged in an arc shape centering on P. That is, the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81 are configured to be in surface contact. The center P is the center when rotating the split iron core 60.

  Since divided iron core 60 is rotated about P, the end face of electromagnetic steel plate 73 on the side of electromagnetic steel plate 76, the end face of electromagnetic steel plate 74 on the side of electromagnetic steel plate 75, the end face of electromagnetic steel plate 74 of electromagnetic steel plate 75, electromagnetic steel plate 76 The end face on the side of the electromagnetic steel plate 73 is also preferably configured in an arc shape with P as a center.

  Next, a procedure for realizing the configuration of the stator core 32a will be described with reference to FIGS. 13, 14, 15, 16 and 17. FIG. Specifically, adjacent split iron cores 60 are connected in a chain, and the connected iron cores are refracted from the connection part. This procedure corresponds to a partial process of the method of manufacturing stator core 32a according to the present embodiment. FIGS. 13, 14, 15, 16, and 17 are enlarged views of the connecting portion of the split core 60 and are represented in plan view seen from the direction perpendicular to the electromagnetic steel sheet, and in FIG. Indicates the circumferential direction when the split cores 60A and 60B form the stator core 32a, Y indicates the radial direction when the split cores 60A and 60B form the stator core 32a, and Z indicates the split core 60A and 60B represent axial directions when the stator core 32a is formed.

First, the procedure for connecting the split iron cores 60A and 60B will be described.
As shown in FIG. 13, the electromagnetic steel plates 75 and 76 are moved toward the electromagnetic steel plates 73 and 74. That is, the split iron core 60B is moved toward the split iron core 60A. At that time, the electromagnetic steel plates 73 of the divided core 60A and the electromagnetic steel plates 76 of the divided core 60B are moved to be in the same layer. Similarly, the electromagnetic steel plates 74 of the divided core 60A and the electromagnetic steel plates 75 of the divided core 60B are moved so as to be in the same layer.

  As shown in FIG. 14, the electromagnetic steel plate 75 of the layer L2 is inserted into the gap generated below the electromagnetic steel plate 73 of the layer L1 that is one layer higher. In the process of inserting the electromagnetic steel plate 75 of the layer L2, the projection 82 of the electromagnetic steel plate 75 of the layer L2 is opposite to the side where the axial projection 82 protrudes by the circumferential end of the electromagnetic steel plate 73 of the layer L1. Receive a force and elastically deform. Specifically, as the electromagnetic steel plate 75 of the layer L2 is inserted, the projection 82 is gradually crushed by the circumferential end of the electromagnetic steel plate 73 of the layer L1 in contact with the inclined surface of the projection 82. The circumferential end of the electromagnetic steel plate 73 corresponds to the end 3C of the electromagnetic steel plate 73 of the layer L1 shown in FIG.

The electromagnetic steel plate 75 of the layer L4 is also inserted into the gap generated below the electromagnetic steel plate 73 of the layer L3 that is one layer higher than the electromagnetic steel plate 75 of the layer L2.
Therefore, the electromagnetic steel plate 73 of the layer L3 is inserted into the gap generated below the electromagnetic steel plate 75 of the layer L2 that is one layer higher.

  As described above, in the present embodiment, since the projections 82 of the electromagnetic steel plate 75 are elastically deformed, the electromagnetic steel plate 75 can be easily inserted as compared with other methods such as press fitting.

As shown in FIG. 15, when the projections 82 of the electromagnetic steel plate 75 of the layer L2 reach the holes 81 of the electromagnetic steel plates 73 of the layer L1, they return to their original shapes by elastic force and fit into the holes 81. Thereby, the electromagnetic steel plate 75 of the layer L2 and the electromagnetic steel plate 73 of the layer L1 are engaged. The electromagnetic steel plate right side 75 of the layer L4 and the electromagnetic steel plate 73 of the layer L3 are engaged in the same manner as the electromagnetic steel plate 75 of the layer L2 and the electromagnetic steel plate 73 of the layer L1.
When the hole 81 and the projection 82 are fitted, the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81 are in contact, and the outer peripheral surface 82B of the projection 82 and the inner wall 81B of the hole 81 are in contact. In the state, it is engaged.

By the above mechanism, the hole 81 and the projection 82 are engaged, and the split iron core 60A and the split iron core 60B are connected. At this time, the connecting portion 65 is formed by the hole 81 and the projection 82. The connecting portion 65 is engaged with the outer peripheral surface 82C of the projection 82 in contact with the inner wall 81C of the hole 81 and the outer peripheral surface 82B of the projection 82 in contact with the inner wall 81B of the hole 81. There is.
By repeating the above-described procedure with the other split iron cores 60, the other split iron cores 60 can also be sequentially linked to form chain-connected iron cores.

  As shown in FIG. 16, even if the split iron core 60B connected temporarily is pulled from the split iron core 60A in the direction opposite to the moving direction, the projection 82 of the split iron core 60B is the split iron core 60A. Since the contact force, ie, the drag is exerted between the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81, the split iron cores 60A and 60B are not pulled apart. In particular, since the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81 are arc shapes having the same center and the same radius, a large contact force is exerted by surface contact between the surfaces. In addition, even if a greater contact force is exerted due to the surface contact, the load is dispersed over the entire surface, and the engagement state can be maintained without damaging the protrusions 82 and the holes 81.

  If the projection 82 and the hole 81 are in point contact, the load may concentrate on the contact point and damage the projection 82 and the hole 81. For example, in the case of a rectangular cross section where the projection 82 is orthogonal to the vertical direction of the magnetic steel plate 75, the apex of the square and the arc-shaped surface of the inner wall 81C of the hole 81 make point contact. If a large contact force is applied, the projections 82 or the holes 81 may be damaged. However, in the present embodiment, surface contact prevents it.

Even if the split iron core 60B connected is pushed toward the split iron core 60A in the moving direction, the end 3C of the electromagnetic steel plate 73 and the end 6C of the electromagnetic steel plate 76 press against each other, and the electromagnetic steel plate Since the end 4 C of 74 and the end 5 C of the magnetic steel plate 75 are pressed against each other, the protrusions 82 do not come out of the holes 81 because they stop each other. That is, the split iron cores 60A and 60B are not disconnected.
In addition, even if a force acting to shift in the radial direction acts, the divided core cores 60A and 60B connected are shifted in the radial direction by the contact force between the outer peripheral surface 82B of the projection 82 and the inner wall 81B of the hole 81. There is no. Also in this case, the surface contact between the projections 82 and the holes 81 disperses the load over the entire surface, and the engaged state can be maintained without damaging the projections 82 and the holes 81.

  Next, a procedure for refracting the iron cores connected in a chain from the connecting part will be described. Specifically, the split iron core 60B is moved toward the teeth of the split iron core 60A centering on the connecting portion 65.

When split iron cores 60A and 60B are connected in a chain shape, the outer peripheral surface 82B of projection 82 contacts the inner wall 81B of hole 81, and the outer peripheral surface 82C of projection 82 contacts the inner wall 81C of hole 81. It is united. When divided core 60B is moved toward the teeth of divided core 60A, protrusion 82 is from inner wall 81B of hole 81 to inner wall 81A of hole 81 while outer peripheral surface 82C of protrusion 82 is along inner wall 81C of hole 81. Moving. Then, as shown in FIG. 17, the outer peripheral surface 82A of the projection 82 and the inner wall 81A of the hole 81 are stopped in contact with each other.
Thereby, the split iron cores 60A and 60B connected can be rotated about the point P of the connecting portion 65 and can be refracted. By rotating in this manner, divided core 60B can be rotated without deviating from the rotation trajectory.

  When split iron core 60 pivots around point P of connecting portion 65, end 6C of electromagnetic steel plate 76 moves along end 3C of electromagnetic steel plate 73, and end 5C of electromagnetic steel plate 75 is the electromagnetic steel plate. Move along the edge 4C of 74. In addition to the contact force between the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81, the contact force between the end 6C of the electromagnetic steel plate 76 and the end 3C of the electromagnetic steel plate 73 and the end 5C of the electromagnetic steel plate 75 and the end of the electromagnetic steel plate 74 Since the contact force with 4 C is applied and rotated while utilizing it, the split iron core 60 can be rotated without deviating from the rotation trajectory.

When divided core 60 is rotated about point P of connecting portion 65, butting surfaces are brought into contact or pressed with each other to stop the rotation.
Specifically, as shown in FIG. 9, the electromagnetic steel sheet 71 of the first type has abutting surfaces 83 and 84 at both ends in the circumferential direction of the back yoke. The electromagnetic steel sheet 72 of the second type has abutting surfaces 85 and 86 at both ends in the circumferential direction of the back yoke as shown in FIG. When the split core 60 is annular, the split core 60A and the split core 60B are in contact with the butt surface 83 of the split core 60B and the butt surface 84 of the split core 60A. Similarly, the butt surface 85 of the split core 60B and the butt surface 86 of the split core 60A are in contact with each other.

  Therefore, when divided core 60 is rotated, in addition to contact between outer peripheral surface 82A of protrusion 82 and inner wall 81A of hole 81, butt surface 83 of electromagnetic steel plate 71 of one divided core 60 and the other divided core 60. The abutting surface 84 of the magnetic steel plate 71 contacts or presses, but the abutting surface 85 of the electromagnetic steel plate 72 of one split iron core 60 and the abutting surface 86 of the electromagnetic steel plate 72 of the other split iron core 60 Rotation is stopped.

  When the butt surfaces are in contact with each other, the annular stator core 32a can be formed without narrowing the magnetic path of the magnetic flux passing through the back yoke 32b. Since the stator core 32a does not narrow the magnetic path of the back yoke 32b, it can be configured without reducing the efficiency of the electric mechanism 3.

By the above procedure, adjacent divided iron cores can be connected in a chain, and the connected iron cores can be refracted from the connection part.
Even after refraction, the divided core 60B is pulled from the divided iron core 60A in the opposite direction to the movement from the divided iron core 60A, similarly to the state of being connected in a chain shape, even if the divided iron core 60B is pulled. The contact force between the projection 82 and the inner wall of the hole 81 acts on the surface contact between the inner wall 81C and the inner wall 81C, and the split iron cores 60A and 60B are not pulled apart. And, since the projections 82 and the holes 81 are in surface contact, the load as the contact force is dispersed, and the engagement state can be maintained without damaging the projections 82 or the holes 81.
Even if the core segments 60A and 60B are pushed in the circumferential direction, the butting surfaces 83 and 84, 85 and 86 stop each other, and the projection 82 does not come out of the hole 81. That is, the split iron cores 60A and 60B are not disconnected.
In addition, even if a force causing radial displacement is exerted, the divided core cores 60A and 60B connected are displaced in the radial direction by the contact force between the outer peripheral surface 82A of the projection 82 and the inner wall 81A of the hole 81. There is no. Also in this case, the surface contact between the projections 82 and the holes 81 disperses the load over the entire surface, and the engaged state can be maintained without damaging the projections 82 and the holes 81.

  Conventionally, welding is performed to the joint surfaces 66A and 66B which finally close the ring, but in the present embodiment, the projection 82 and the hole 81 are also formed at the portion where the ring is finally closed, like the other connecting portions. And the projection 82 is engaged with the hole 81. By using this configuration, adjacent split iron cores 60 can be connected to each other even in a state in which insulating members 32f are mounted on split iron cores 60. This is because the projections 82 fit into the holes 81 by inserting the electromagnetic steel plate 75 into the gap formed below the electromagnetic steel plate 73 in the layer above, so rivets or caulks are made in the lamination direction of the electromagnetic steel plates. It can be connected without the need to go. Even if the insulating member 32 f covers the connection portion, the connection of the core segments 60 is not disturbed.

  However, the procedure of fitting the projection 82 into the hole 81 when the ring is finally closed can not be assembled by pivoting after connection as described above. The connection operation and the rotation operation can not be performed separately, and the procedure is to connect while rotating. However, the effect on loading after engagement is exactly the same as for the other connections.

As described above, the stator core 32a can have a predetermined annular shape.
Even when a load is applied to the connected split iron cores 60 during assembly, the connected split iron cores 60 are not pulled apart. In particular, the outer peripheral surface 82C of the projection 82 and the inner wall 81C of the hole 81 are in surface contact, and a contact force is exerted to suppress separation of the divided iron cores 60 from each other. The surface contact between the projections 82 and the holes 81 disperses the load as the contact force, and the engagement between the projections 82 and the holes 81 can be maintained without damaging the projections 82 or the holes 81.
Also, even if a load in the reverse direction is applied to the split iron cores 60 connected, the butt surfaces do not restrain each other, and the projections 82 do not come out of the holes 81, so that the engagement state can be maintained.
Further, even if a force such as radial displacement is exerted, the split iron cores 60 connected are not displaced in the radial direction by the contact force between the outer peripheral surface 82A of the projection 82 and the inner wall 81A of the hole 81. . Also in this case, the surface contact between the projections 82 and the holes 81 disperses the load over the entire surface, and the engaged state can be maintained without damaging the projections 82 and the holes 81.

  In addition, since the joint that finally closes the ring can be made annular without welding, the workability is improved. Furthermore, since all the connecting portions of the stator core 32a can be made to have the same structure, the rigidity of the ring of the stator core 32a can be made uniform. Since the rigidity of the ring of the stator core 32a can be made uniform, the stator core 32a is also resistant to distortion due to the load applied to the stator core 32a.

On the other hand, after the stator core 32a is assembled in an annular shape, when a load that deforms from an annular shape is applied, the load is determined by the rotational structure of the connection portion, the restraint structure, and the abutment structure. At the same time as dispersing, it prevents deviation in the circumferential direction and radial direction of the core segments.
For example, even if parts expand and contract due to heat action, the pivoting structure and the stop structure of the connection portion and the stop structure of the butt face generate a repulsive force against strain, and the ring shape of the stator core 32a Try to keep Thereby, even if it press-fits to the airtight container 1 and welds, roundness can be maintained.

  In addition, when the stator core 32a is incorporated in the closed container 1 and operated as a compressor, the stator core 32a is distorted due to the heat action of the refrigerant gas, even if the high pressure and high temperature refrigerant gas passes. It can absorb and keep roundness.

As described above, when the stator core of the present embodiment is incorporated into a sealed container, distortion can be absorbed and high roundness can be maintained. That is, the motorized mechanism portion in which the uneven rotation is suppressed, which relieves the load and stress when incorporated in the closed container and suppresses the deformation of the stator, can be obtained. And by using the electric mechanism part for a compressor, the compressor which suppressed a noise and efficiency fall is obtained.
In addition, even when the compressor is operated as a refrigerant compression compressor, the influence of the heat action of the high pressure and high temperature refrigerant gas can be suppressed, and a compressor with reduced noise and reduced efficiency can be obtained.

  Also, as a stator of a compressor motor, it is possible to assemble an annular member after attaching an insulating member to a split core and winding a fixed winding, as before, so as to manufacture without changing the work environment it can.

  In addition, even if the connecting part of the core segment is covered by the insulating member and the connecting part can not be visually recognized, the hole and the projection are engaged because the stopping position is determined by surface contact. It is easy to grasp the engagement position and state when working.

  In addition, since it is possible to use a divided core in which the working environment does not change from the conventional one, even when using a thick wire for the stator winding, it is necessary without being restricted by the stator winding space. The number of turns can be wound. That is, it is possible to obtain an efficient compressor that maintains the necessary torque of the electric mechanism portion and reduces the loss due to the stator winding.

  Also, even if the stator receives a load in the circumferential direction and radial direction, the split iron core restrains and suppresses the displacement in the circumferential direction and radial direction, so there is a gap between the butt faces of the back yokes of the split iron core. The abutment surfaces can be reliably brought into contact and kept in an annular shape without being born. As a result, the magnetic path passing through the back yoke narrows, and an efficient compressor can be obtained without reducing the efficiency of the motorized mechanism.

  In addition, by not having welds in the stator core connection, all the stator core connection parts can be made to have the same structure, and therefore the rigidity of the stator core ring can be made uniform. Since the rigidity of the ring of the stator core can be made uniform, the stator core is also resistant to distortions due to the load applied to the stator core. Furthermore, by not performing welding, the workability is also improved.

  In addition, by not having welds in the stator core connection, two types of electromagnetic steel sheets can be used to make up the split core, and punching die such as press can be saved, and production equipment can be used efficiently. It will be.

  In the present embodiment, only the electromagnetic steel sheet having the protrusion 82 or the hole 81 has been described, but it is not necessary that all the laminated electromagnetic steel sheets have the protrusion 82 or the hole 81. It is also possible to use an electromagnetic steel plate which does not have the projections 82 and the holes 81 as the electromagnetic steel plates in the process of being overlapped. By using the electromagnetic steel plates without the projections 82 and the holes 81, when the electromagnetic steel plates 75 are inserted into the gaps formed under the electromagnetic steel plates 73 in the layer immediately above, the resistance between the electromagnetic steel plates decreases and the insertability Can be improved.

The inner wall on the electromagnetic steel plate 74 side of the hole 81, that is, the inner wall on the center P side is also an arc-shaped surface in a plan view seen from the perpendicular direction to the electromagnetic steel plate 73, but it does not have to be an arc shape. For example, as shown in FIG. 18, it may be linear in a plan view seen from the direction perpendicular to the direction in which the magnetic steel sheets are stacked, that is, the magnetic steel sheets. The linear inner wall may be constituted by at least two sides orthogonal to the inner wall 81A of the hole 81 and the inner wall 81B of the hole 81. With such a configuration, when the split iron core 60A and the split iron core 60B are connected, the protrusion 82 and the inner wall on the center P side of the hole 81 do not inhibit the fitting of the protrusion 82 in the hole 81. Furthermore, when the core segment 60B is rotated, the movement of the projection 82 in the hole 81 is not inhibited by the projection 82 and the inner wall on the center P side of the hole 81.
On the other hand, while the inner wall on the side of the center P of the hole 81 has an arc shape, the hole 81 before rotating the split iron core 60B by using the inner wall orthogonal to the inner wall 81A of the hole 81 and the inner wall 81B of the hole 81. The position of the projection 82 relative to the position of the projection 82 and the position of the projection 82 relative to the hole 81 after pivoting the split iron core 60B can be easily determined. As a result, the engagement state is stabilized and the connection is less likely to be released.

Second Embodiment
In the first embodiment, an example in which the holes 81 of the electromagnetic steel sheet 73 have a fan shape in a plan view seen from the direction in which the electromagnetic steel sheets are stacked, that is, the direction perpendicular to the electromagnetic steel sheets has been described. In this case, the fan-shaped center P is closer to the electromagnetic steel plate 74 than the hole 81, and the point P is the center of rotation of the core segment 60B. However, the hole of the electromagnetic steel plate 73 does not necessarily have to be fan-shaped, and the center of rotation does not have to be closer to the electromagnetic steel plate 74 than the hole 81. The case where the center of rotation is at the same position as the hole 81 will be described.

  FIG. 19 is an enlarged view of the connection portion of the split core 60 and is a plan view seen from the direction perpendicular to the magnetic steel sheet. FIG. 20 is an enlarged view of the hole portion of FIG. This embodiment is the same as the first embodiment except that the holes of the magnetic steel plate 73 are substantially circular and the projections are adjusted to the shape, and the same parts are denoted by the same reference numerals.

The hole 87 of the electromagnetic steel plate 73 is substantially circular in cross section perpendicular to the perpendicular direction to the electromagnetic steel plate 73, and has two convex portions 90 and 91 projecting in the central direction on its inner wall. The convex portions 90 and 91 are arranged to face each other. Furthermore, the convex portions 90 and 91 have the same shape, and the cross section orthogonal to the perpendicular direction to the electromagnetic steel plate 73 is a triangular shape having two straight sides.
Convex portion 90, the outer peripheral surface 90 A which constitutes one side of the electrical steel sheet 74 side, and the outer peripheral surface 90 B that constitutes one side of the electromagnetic steel sheets 76 side from being configured. The convex portion 91 is configured of an outer peripheral surface 91 B that constitutes one side on the electromagnetic steel plate 74 side, and an outer peripheral surface 91 A that constitutes one side on the electromagnetic steel plate 76 side. The outer circumferential surface 90A of the convex portion 90 and the outer circumferential surface 91A of the convex portion 91 are disposed in parallel. Similarly, the outer peripheral surface 90B of the convex portion 90 and the outer peripheral surface 91B of the convex portion 91 are disposed in parallel.
The inner wall 87C of the hole 87 other than the convex portions 90 and 91 is a part of a circular shape, that is, an arc shape.

  The protrusion 82 of the electromagnetic steel plate 75 is the same as that of the first embodiment, and protrudes in the direction in which the electromagnetic steel plates are stacked, that is, in the direction perpendicular to the electromagnetic steel plate 75. Having elasticity, having an inclination in the direction from the magnetic steel plate 74 to the magnetic steel plate 76, the outer peripheral surface of the inner peripheral side of the arc-shaped back yoke 32b of the projection 82, and the outer periphery of the arc-shaped back yoke 32b of the projection 82 The outer peripheral surface on the side is a flat surface facing each other and substantially parallel, and the outer peripheral surface 82C of the electromagnetic steel plate 76 of the protrusion 82 has an arc-shaped cross section perpendicular to the electromagnetic steel plate 75 , The same as the protrusion 82 of the first embodiment. Further, the method of forming the protrusions 82 may also be formed by any method, but it can be formed by cutting and raising a part of the electromagnetic steel plate 72 as in the first embodiment.

  The arc shape of the outer peripheral surface 82C of the projection 82 is formed in an arc shape having the same radius as the radius of the hole 87. Thus, when the protrusion 82 is fitted into the hole 87, the outer peripheral surface 82C of the protrusion 82 is arranged in an arc shape centered on the center of the hole 87. That is, the outer peripheral surface 82C of the projection 82 and the inner wall 87C of the hole 87 have an arc shape or a circle shape having the same center and the same radius, and the surface and the surface are in surface contact. The center of the hole 87 is the center P when rotating the split iron core 60B.

The procedure for connecting the split iron cores 60 and the procedure for bending the split iron cores 60 from the connecting portion to form them in an annular shape are also the same as in the first embodiment.
Specifically, the electromagnetic steel plate 75 is inserted into the gap formed under the electromagnetic steel plate 73 of the layer one upper layer. Thereby, the projection 82 is fitted into the hole 87 and engaged. The protrusion 82 and the hole 87 are in a state in which the outer peripheral surface 82C of the protrusion 82 is in contact with the inner wall 87C of the hole 87, and in a state in which the outer peripheral surface 82A of the protrusion 82 and the outer peripheral surface 90A of the projection 90 of the hole 87 are in contact. The outer peripheral surface 82B of the projection 82 and the outer peripheral surface 91A of the projection 91 of the hole 87 are engaged with each other.
In the above process, the split iron core 60A and the split iron core 60B are connected, and the connecting portion 65 is also configured.
Next, move the segment core 60B toward the tee over scan the segment core 60A. At this time, the protrusion 87 is moved by moving the outer peripheral surface 82 C of the protrusion 82 along the inner wall 87 C of the hole 87. The outer peripheral surface 82A of the projection 82 contacts the outer peripheral surface 90B of the projection 90 of the hole 87, and the outer peripheral surface 82B of the projection 82 contacts the outer peripheral surface 91B of the projection 91 of the hole 87. Movement ends.
As a result, the connecting portion 65 rotates around the center P of the hole 87 , and the projection 82 rotates in the hole 87 . By rotating in this manner, divided core 60B can be rotated without deviating from the rotation trajectory.

  When divided core 60B pivots around connecting portion 65, end 6C of electromagnetic steel plate 76 moves along end 3C of electromagnetic steel plate 73, and end 5C of electromagnetic steel plate 75 is the end of electromagnetic steel plate 74. It is also the same as the embodiment 1 to move along 4 C and to stop or stop the rotation by contact between the butting surfaces of the split iron cores 60 or pushing.

However, since it pivots around the hole 87, the pivot radius of the split iron core becomes smaller. Therefore, when forming the stator core 32a with a small diameter, the configuration is effective.
In addition, since the hole 87 is a hole provided with the convex portions 90 and 91, when the projection 82 is fitted, its stop position is determined. Thereby, even if the connecting portion of the divided core is covered with the insulating member and the connecting portion is not visible, the hole and the projection are engaged because the stop position is determined by surface contact, It is easy to grasp the engagement position and the state when you work while working.

  Since the outer peripheral surface 82C of the projection 82 and the inner wall 87C of the hole 87 are in surface contact with each other even when a load is applied to the connected divided core 60 during assembly, the divided core 60A and the divided core 60A are divided It is also the same as the first embodiment that suppressing separation with the iron core 60B, the load as the contact force is dispersed, and the projections 88 or the holes 87 are not damaged.

  Also, as in the first embodiment, the joint that finally closes the ring can be made annular without welding. Therefore, the rigidity of the ring of the stator core can also be made uniform, and the stator core is also resistant to distortion due to the load applied to the stator core. Furthermore, by not performing welding, the workability is also improved.

DESCRIPTION OF SYMBOLS 1 sealed container, 2 compression mechanism part, 3 electric mechanism part, 4 crankshaft, 5 discharge pipe, 6 suction pipe, 11 upper container, 12 lower container, 21 cylinder, 22 rolling piston, 23 main bearing, 24 sub bearing, 25 Vane, 26 cylinder chamber, 27 vane groove, 28 back pressure chamber, 29 discharge muffler, 30 opening, 31 rotor, 31a rotor core, 31b upper balance weight, 31c lower balance weight, 31d rivet, 31e permanent magnet, 31f Communication hole, 31g oil separation plate, 32 stator, 32a stator core, 32b back yoke, 32c teeth, 32d stator winding, 32e slot, 32f insulating member, 33 lead wire, 34 terminals, 41 main shaft, 42 sub Shaft,
43 eccentric shaft, 60, 60A, 60B split core, 61 caulking, 62 hole, 63, 64 end face, 65 joint, 66 joint, 66A, 66B joint surface, 71 first type magnetic steel sheet, 72 first 2 types of magnetic steel sheet, 73, 74, 75, 76 magnetic steel sheet, 81 holes, 82 protrusions, 83, 84, 85, 86 butting surfaces, 87 holes, 90, 91 convex parts, 100 sealed compressor, 101 suction Muffler, 102 piping, 103 condenser, 104 expansion valve, 105 evaporator, 106 four-way valve.

Claims (11)

In a stator, which is formed by laminating a plurality of electromagnetic steel sheets and has teeth and a back yoke, a plurality of pieces are connected in the circumferential direction at a connecting portion of the back yoke, and are cylindrically formed.
The divided core has a protrusion on one of the circumferential ends of the back yoke, and a hole on the other of the circumferential ends of the back yoke,
The protrusion has an elastic force and an arc shape on the teeth side,
The hole has an arc shape on the side opposite to the side on which the protrusion is disposed,
The protrusion of the other adjacent divided core is fitted into the hole of one divided core by the elastic force of the protrusion, and the arc-shaped outer peripheral surface of the protrusion of the connecting portion is the hole of the hole. contact with the inner wall of the arc shape, is engaged, the outer peripheral surface of the circular arc shape of the projections along the inner wall of the arc shape of the hole, is configured to rotate,
The divided core connects all the connection points of the divided core at the connection portion, and the connection portion closing in a cylindrical shape is also connected at the connection portion. The stator according to claim 1 , wherein a radius of the arc-shaped inner wall of the hole and a radius of the outer circumferential surface of the arc-shaped protrusion of the protrusion coincide with each other. The divided core is configured by stacking a first electromagnetic steel sheet and a second electromagnetic steel sheet,
The first of said holes provided in the electrical steel sheet, the second stator according to claim 1 or 2, wherein the projections are provided in the electromagnetic steel sheets. The stator according to claim 3 , wherein the hole has a fan-shaped cross section perpendicular to a direction perpendicular to the first magnetic steel sheet. The stator according to claim 4 , wherein the divided iron core is prevented from rotating when the protrusion is in contact with the fan-shaped linear portion of the hole. The hole of the first electromagnetic steel sheet has a circular cross section orthogonal to the perpendicular direction to the first electromagnetic steel sheet, and has a triangular convex portion toward the center of the circular shape. The stator according to 3 . The stator according to claim 6 , wherein the divided iron core is prevented from rotating when the protrusion is in contact with the straight portion of the convex portion of the hole. The stator according to any one of claims 3 to 7 , wherein the projection has an elastic force in a direction perpendicular to the second magnetic steel sheet, and is inserted into the hole by the elastic force. The first electromagnetic steel sheet has a projecting portion which is protruded in the circumferential direction of the back yoke from the stacked second electromagnetic steel sheets at one of circumferential end portions of the back yoke.
The second electromagnetic steel sheet has a protruding portion which is protruded in the circumferential direction of the back yoke from the stacked first electromagnetic steel sheets on the other of the circumferential end of the back yoke.
The hole is provided in the projecting portion of the first electromagnetic steel sheet,
The stator according to any one of claims 3 to 8 , wherein the projection is provided on a projecting portion of the second magnetic steel sheet. The fixing according to any one of claims 1 to 9 , wherein the divided core includes an insulating member on an axial end face of the arc shape of the back yoke, and the insulating member is disposed in the axial direction of the hole. Child. The stator according to any one of claims 1 to 10 ,
A sealed container in which the stator is fixed inside.

Images