JP4064597B2 - Compressor and its assembly method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compressor in which a compression mechanism and an electric motor that drives the compression mechanism via a drive shaft are accommodated in a container, and an assembling method thereof.
[0002]
[Prior art]
This type of compressor uses a pressure vessel, and the compression mechanism employs a scroll compressor, rotary compressor, or reciprocating compressor, and the motor has a structure in which a copper wire is wound around an iron-based stator or rotor. Is adopted. Applications are mainly for refrigeration cycles, suitable for air conditioning, refrigeration and refrigeration. Each type is used taking advantage of its characteristics. Scroll type and rotary type are widely used in residential space because of its quietness.
[0003]
In order to accommodate the compression mechanism and the electric motor in the container, when the stator of the electric motor is conventionally iron-based, but the container is also iron-based, when the scroll compressor is taken as an example, it is fixed as shown in FIG. The mainstream is to fit the bearing member d on the side of the compression mechanism b of the drive shaft c of the child a and the compression mechanism b with the inner side of the body part of the container e, or to weld and support them. . On the other hand, if the container e is made of aluminum, it is difficult to shrink fit or weld with the iron-based stator a. Therefore, as shown in FIGS. 5 and 6, bolts are bolted in the axial direction with bolts f. Has become mainstream.
[0004]
[Problems to be solved by the invention]
By the way, in order to be able to operate with high durability without vibration and unreasonableness, the compression mechanism, the electric motor, and the drive shaft are aligned so that the whole can be operated smoothly without any eccentricity or twisting such as alignment of the axes.
[0005]
However, in the conventional structure of FIG. 3 , the axis of the stator a and the compression mechanism b is restricted only by being fitted to the body of the container e, and any one of the stator a, the compression mechanism b, and the container e. Even if there is a runout due to a manufacturing error or subsequent deformation, it is difficult to adjust this. Therefore, the bearing member d is fitted and fixed to the container e without any play, but the compression mechanism b has play between the container e and the parts of the compression mechanism b are applied to the fixed bearing member d. Positioning is performed sequentially and bolted at the end, but it takes a long time to assemble due to the effect of working alone in the heavy container e.
[0006]
In addition, the bolting structure shown in FIGS. 4 and 5 is suitable for the relationship between the aluminum container e and the iron-based stator a or bearing member d, which is a material relationship that cannot be shrink-fitted or welded. Since the stator a and the bearing member d fitted to the container e without play are bolted in the axial direction, the same problem as in FIG . Further, as shown in FIG. 5 , the compression mechanism b shares the bolt f with the fastening of the compression mechanism b itself in the assembled state and the bolting to the container e, so that the number of parts and assembly man-hours can be reduced accordingly. However, it is necessary to complete the positioning while assembling each component of the compression mechanism b, and at the same time when the assembly and the alignment are completed, it is necessary to complete the fastening with the bolt and the bolting to the container e. This is more difficult and requires more skill than the case shown in FIG .
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a compressor and an assembling method thereof that can easily be adjusted with respect to each other and can be accurately assembled.
[0009]
[Means for Solving the Problems]
The compressor and its assembling method of the present invention are intended for a compressor in which a compression mechanism and an electric motor that drives the compression mechanism via a drive shaft are contained in a container.
[0010]
In order to achieve the above object, a compressor according to the present invention includes a first container division portion in which a stator of an electric motor in which a rotor and a stator are opposed via a circumferential gap is bolted and accommodated in an axial direction; A compressor having a second container divided portion in which a compression mechanism driven by a drive shaft connected to the rotor is fixedly housed, and a bolting portion between the stator and the first container divided portion Is configured such that the radial position can be adjusted by a clearance in a direction perpendicular to the axis provided between the stator and the first container dividing portion, and the stator is in a state in which the runout relative to the compression mechanism is adjusted. it is fixed to the first container divided portion, said first container divided portion and the second container wedges is a feature to be bolted in the axial direction.
[0011]
In such a configuration, the first container split portion in which the stator of the electric motor in which the rotor and the stator are opposed to each other via a circumferential gap is bolted and stored in the axial direction, and the drive shaft connected to the rotor Even if the axial position of the second container divided portion fixedly housed by the compression mechanism driven by the fitting is constrained by the mutual fitting, the axial line provided between the first container divided portion and the stator Adjusting the runout between the stator on the side of the first container split part and the compression mechanism and rotor on the side of the second container split part by adjusting the radial position at the bolting part using the clearance at right angles As in the conventional case where both the stator and the compression mechanism part are fitted and fixed to one container division part, adjustment is difficult or adjustment is possible even if the center is shifted in both sides. The inconvenience that could not be resolved, the compressor Since Nakuseru runout of the rotor and the stator of the electric motor drive shaft has to be connected to may be assembled well easily and quickly and precisely.
[0013]
Compressor of the present invention has the scroll type, the axis in the compression mechanism includes a fixed scroll and the bearing member, and slidably held between a rotation preventing member for preventing rotation of the orbiting scroll and the orbiting scroll state bolted to the direction, and is bolted in the axial direction separately from the second container wedges and the bolts.
[0014]
In such a configuration, the compression mechanism alone, a complicated operation mechanism such as the bearing member to the rotation-preventing member and the orbiting scroll of the drive shaft constituting the compression mechanism, assembled and clamped between the bearing member and the fixed scroll The unit can be easily and quickly adjusted to the specified positional relationship and bolted into a unit, including the relationship with the external input that is used by mounting the drive shaft bearing on the bearing member. The compressed compression mechanism unit can be easily and quickly fixed to the container while maintaining a precise assembled state by simply bolting the second container division part in the axial direction separately from the bolting. .
[0017]
In the above invention, the first container and the second container are further configured in such a manner that the compression mechanism portion protruding from the second container divided portion is fitted to the first container divided portion without play in the direction perpendicular to the axis. When the compressor is combined with the unitization of the compression mechanism unit and the adjustment of the runout due to the clearance, the compressor can be adjusted while preventing the position of the runout adjustment from increasing. Can be assembled with high accuracy.
[0020]
Even if each of the above features is regarded as an invention of the following assembling method, the same feature can be exhibited.
[0021]
The first compressor assembling method of the present invention includes a first container division portion in which a stator of an electric motor in which a rotor and a stator are opposed to each other through a circumferential gap is bolted and accommodated in an axial direction, and the rotation A compressor manufacturing method comprising: a second container divided portion in which a compression mechanism driven by a drive shaft coupled to a child is fixedly housed; and the axis of the stator and the first container divided portion is The position of the stator and the compression mechanism is adjusted by adjusting the position using a clearance in a right angle direction, and the stator is bolted to the first container divided portion in the axial direction, and then the first The container divided part and the second container divided part are bolted in the axial direction .
[0024]
The second compressor assembling method of the present invention distributes the stator and the compression mechanism of the electric motor to the first and second container divided parts that are bolted to each other in the axial direction and is bolted in the axial direction. In order to integrate the first and second container divided parts by bolting in the axial direction, position adjustment using a clearance perpendicular to the axis of the stator with respect to the first container divided part is used to adjust the first and second container divided parts. The position of the scroll compression mechanism portion is adjusted with the compression mechanism portion bolted to the container dividing portion 2, and the scroll compression mechanism portion bolts the fixed scroll of the scroll compression mechanism to the bearing member of the drive shaft in the axial direction. A second container separate from the bolting in a state in which the orbiting scroll and the rotation preventing member for preventing the orbiting scroll from rotating are sandwiched between the fixed scroll and the orbiting scroll and the bearing member. Bolted in the axial direction, characterized by assembling the compressor.
[0025]
In the above assembling method, the compression mechanism portion protruding from the second container division portion is fitted to the first container division portion without play in a direction perpendicular to the axis, and the compression mechanism portion and the first container division portion are Positioning can also be performed.
[0026]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a compressor and an assembling method thereof according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 for understanding of the present invention.
[0028]
This embodiment is an example of a case of a compressor for a refrigeration cycle in which a horizontal scroll type compression mechanism is built in a container together with an electric motor that drives the compression mechanism, and a compression target is a refrigerant. However, the present invention is not limited to this, and is effective when applied to various types of compressors in which various types of compression mechanisms such as a rotary type and a reciprocating type are combined with an electric motor that drives the compression mechanism. But its features remain the same.
[0029]
As shown in FIG. 1, the compressor according to the present embodiment contains a compression mechanism 2 and an electric motor 3 driven by a crankshaft 4 as a drive shaft in a container 1. The crankshaft 4 is supported by a main bearing member 5 having a main shaft 4 a on the compression mechanism 2 side provided on one side in the longitudinal direction in the container 1, and the opposite end is provided on the other side in the longitudinal direction in the container 1. The auxiliary bearing member 6 is bearing.
[0030]
A fixed scroll 7 is bolted to the main bearing member 5, and the orbiting scroll 8 is sandwiched between the main bearing member 5 and the fixed scroll 7 and meshed with the fixed scroll 7 to constitute a scroll-type compression mechanism 2. . The boundary between the orbiting scroll 8 and the main bearing member 5 is provided with an anti-rotation mechanism 9 such as an Oldham ring that prevents the orbiting scroll 8 from rotating and guides it to move in a circular orbit. The orbiting scroll 8 is moved in a circular orbit by driving the orbiting scroll 8 eccentrically with the main shaft 4a. At this time, using the fact that the compression chamber 11 formed at the boundary portion between the fixed scroll 7 and the orbiting scroll 8 becomes smaller while moving from the outer peripheral side to the central portion, the suction side connection port communicated to the outside of the container 1 12 and the suction hole 13 in the outer peripheral portion of the fixed scroll 7 are sucked and compressed, and the refrigerant that has become a predetermined pressure or more pushes the reed valve 15 from the discharge port 14 in the center of the fixed scroll 7 to open the container. 1 to repeat the discharge.
[0031]
The electric motor 3 is located between the main bearing member 5 and the auxiliary bearing member 6, and includes a stator 3 a that is fixed to the container 1 and a rotor 3 b that is integrally coupled to the outer periphery in the middle of the crankshaft 4 . 1. As shown in FIG. 2, they are configured to face each other through a circumferential gap, and balance weights 16 are provided on the outer peripheral portions of the upper and lower end surfaces of the rotor 3b, whereby the rotor 3b and the crankshaft 4 are connected to each other. It can rotate stably and the orbiting scroll 8 can be stably orbitally moved.
[0032]
A pump 17 is provided at the end opposite to the main shaft 4 a of the crankshaft 4, and oil 19 is sucked by the pump 17 from the oil reservoir 18 at the lower end of the container 1, and is an oil supply hole that runs vertically through the crankshaft 4. 21 is supplied to the bearings 22 of each part of the compression mechanism 2 and the sliding parts of the compression mechanism 2. The supplied oil 19 flows out and drops into the container 1 through the bearing portion 22 so as to obtain a clearance by supply pressure or gravity, and is finally collected in the oil reservoir 18.
[0033]
On the other hand, the refrigerant gas discharged from the compression mechanism 2 is passed to the electric motor 3 side to cool the electric motor 3, and then discharged from the discharge side connection port 23 of the container 1 to the outside of the container 1 and supplied to the refrigeration cycle.
[0034]
Thus, the container 1 from which the compressed refrigerant from the compression mechanism 2 is discharged is a pressure container and has a thick structure, and is heavy when it is iron-based. Therefore, in the present embodiment, a light metal having a specific gravity smaller than that of an iron-based material is employed in order to reduce weight. One example of the light metal is aluminum, which is thicker than that of an iron-based material, but is advantageous in that it can be reduced in weight. However, from the features of the present invention, it may be iron-based, and the container 1 is not limited to light metal.
[0035]
Corresponding to the fact that the container 1 is in a material relationship that cannot be shrink-fitted with the iron-based stator 3a, the stator 3a is circumferentially connected to the stepped surface 25 of the inner surface of the body 1a of the container 1 by bolts 26. A plurality of positions are bolted and fixed in the axial direction. However, the stator 3a is provided with a clearance C in a direction perpendicular to the axis as shown in FIGS. 1 and 2 between the body 1a of the container 1 and the position of the axis can be adjusted between the body 3a. It is like that.
[0036]
The container 1 is composed of three container divided parts including the body 1a and end plates 1b and 1c fixed to the opposite ends thereof by bolts 27 at a plurality of positions on the circumference in the axial direction. The compression mechanism portion A formed by the member 5 and the compression mechanism 2 is a state in which the compression mechanism 2 is bolted to the main bearing member 5 of the crankshaft 4 by bolts 61 at a plurality of positions on the circumference thereof by bolts 61 in the axial direction. In addition to the fastening, bolts 28 are attached and fixed to the end plate 1b by bolting in the axial direction at a plurality of positions on the circumference thereof. The compression mechanism portion A is configured such that the main bearing member 5 is fitted to the inner periphery of the end plate 1b without play so that there is no runout with the end plate 1b.
[0037]
As described above, the body portion which is the two container divided portions for bolting the stator 3a of the electric motor 3 and the compression mechanism portion A including the main bearing member 5 on the compression mechanism 2 side of the crankshaft 4 to each other in the axial direction. 1a and the end plate 1b are bolted in the axial direction, and the barrel portion 1a and the end plate 1b are bolted and integrated in the axial direction, so that the stator 3a is fixed to the barrel portion 1a and the compression mechanism portion is connected to the end plate 1b. Even if A is bolted in the axial direction and the axial position is constrained by fitting each other, the barrel 1a and the end plate 1b are adjusted by position adjustment in the direction perpendicular to the axial line at the portion to which the bolt is bolted. The rotor 3b and the stator 3a of the electric motor 3 of the crankshaft 4 connected to the compression mechanism 2 are adjusted by adjusting the runout between the stator 3a on the side of the part 1a and the compression mechanism part A on the side of the end plate 1b. So you can eliminate And it can quickly be assembled accurately.
[0038]
Further, the body 1a and the end plate 1b are bolted and integrated in the axial direction, and are bolted to the body 1a by adjusting the position using the clearance C with the body 1a of the stator 3a. The runout adjustment between the stator 3a and the compression mechanism part A bolted to the end plate 1b can also be performed, and the degree of freedom of the runout adjustment is improved.
[0039]
Further, the compression mechanism A alone is configured by assembling a complicated operation mechanism such as the rotation prevention mechanism 9 and the orbiting scroll 8 on the main bearing member 5 constituting the compression mechanism A with the main bearing member 5. That is, the fixed scroll 7 of the compression mechanism 2 is bolted to the main bearing member 5 in the axial direction, so that the orbiting scroll 8 and the orbiting scroll 8 and the main bearing member 5 are interposed between the main bearing member 5 and the fixed scroll 7. A predetermined positional relationship including a relationship with an external input that is mounted and used with a crankshaft 4 bearing on the main bearing member 5 with a rotation prevention mechanism 9 that prevents the rotation of the orbiting scroll 8 interposed therebetween. Can be easily and quickly aligned and bolted with the bolt 61 to form a unit, and the unitized compression mechanism A can be used as a single unit. 28 by simply separately bolted axially end plate 1b, can be fixed easily and quickly the container while maintaining an accurate assembled state.
[0040]
It should be noted that the container 1 can exhibit the same function and effect as long as the above conditions are satisfied, regardless of how and where the container divided parts are divided, and belongs to the category of the present invention.
[0041]
By the way, in the compressor, corresponding to the fact that the weight of the electric motor 3 occupies 1/2 to 1/3 and is the main cause of the weight increase, in this embodiment, the weight of the compressor centering on the electric motor 3 is reduced. Is also planned.
[0042]
In this regard, in order to bolt the stator 3a to the container 1 as described above, the outer periphery is bolted at three locations as shown in FIG. As a result, the number of bolts that have been conventionally fastened with four bolts is reduced by one, so that the bolt 26 and the body 1a of the container 1 as shown in FIGS. Since the thick portions 1d and 3a1 of the child 3a are reduced, the weight of the compressor can be reduced, the weight is reduced, and the number of parts and the number of assembly steps are reduced, so that the cost can be reduced.
[0043]
In addition, as shown in FIG. 2, the electric motor 3 according to the present embodiment has three bolting positions facing a plurality of poles at the same time with respect to a normal type in which the rotor 3b has four poles such as permanent magnets. The timing is lost, and the conventional problem that four bolting positions face each other at the same time as the four poles of the rotor 3b and coincide with the vibration antinodes every 90 ° to resonate is solved.
[0044]
Further, in response to the winding 31 of the stator 3a being a star-shaped three-phase winding, the windings are arranged in the outermost circumferential direction by arranging them in parallel as shown in FIG. Since there are three boundary portions 31b between 31a and winding group 31a, the bolting positions can be opposed to each other as shown in FIG. 2 to avoid interference with each winding group 31a. In order to avoid the interference, the bolting position does not have to be greatly extended outward, and the thick portions 1d and 3a1 can be slimmed down and the weight can be reduced.
[0045]
Further, at least one of a cavity, a notch that is continuous in the axial direction or stops in the middle, or a hole for reducing the weight is provided in at least one of the stator 3a and the rotor 3b of the electric motor 3 in the circumferential direction. Provided above. In the example shown in FIGS. 1 and 2, continuous notches 41 are provided at a plurality of locations on the outer periphery of the stator 3a.
[0046]
Such cavities, notches 41, and holes are easily formed by the stator 3a and the rotor 3b having a laminated structure, and by forming a set of holes in the laminated plate materials, and by dispersing the cavities as necessary. The purpose of the compressors for conventional refrigeration cycles is different from the cooling holes provided in the stator and rotor for cooling the motor through the refrigerant, and there are limits from requirements such as strength, safety, and motor efficiency. By making use of a larger or larger number of cooling holes than the number of cooling holes, the weight of the compressor is reduced in proportion to the total volume of the cavities, notches 41 and holes, and the weight can be easily reduced. When there is a problem in the flow of the refrigerant, the notches 41 and the holes can be stopped halfway. Moreover, there is no such worry when hollow.
[0047]
Further, at least one of the notches 41 and the holes 42 may be provided in the circumferential direction by forming an axial silencing passage through which the refrigerant passes through an expansion type or interference type silencing characteristic. it can. Accordingly, the notches 41 and the holes 42 in the axial direction for reducing the weight exhibit a silencing action such as an interference type and an expansion type, and are provided larger or more than those for conventional cooling. Due to the large change in the area or the numerous silencing passages 51, the pulsation of the fluid that is compressed and discharged can be suppressed and the silencing effect can be enhanced.
[0052]
【The invention's effect】
According to the present invention, as is apparent from the above description, the first and second container divided parts are bolted to each other and the stator and the compression mechanism are individually bolted, the stator and the same. By adjusting the position using the degree of freedom of position, such as the clearance between the container divided parts that bolt the bolts, adjustment can be performed easily and quickly even if the stator and compression mechanism both run out, making it easy and accurate. In addition, it can be assembled quickly and the cost can be reduced.
[0053]
In addition, the scroll-type compression mechanism part uses a complex operating mechanism such as a rotation prevention member and a turning scroll on the bearing member of the drive shaft, and the external input using the drive shaft bearing on the bearing member with the bearing member. The unit can be easily adjusted and assembled into a predetermined positional relationship and assembled into a unit, and the unitized compression mechanism only needs to be bolted to the container alone in the axial direction. As a result, the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a compressor according to an embodiment of the present invention. FIG. 2 is an end view schematically showing a winding showing a stator of an electric motor housed in the compressor shown in FIG. A cross-sectional view showing a conventional example of a compressor FIG. 4 is a cross-sectional view showing a mounting portion between an electric motor and a container of another conventional example of the compressor FIG. 5 is a scroll type compressor and a container of the compressor of FIG. Sectional view showing the attachment part with [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 1a Body part 1b, 1c End plate 2 Compression mechanism 3 Electric motor 3a Stator 3b Rotor 4 Crankshaft 5 Main bearing member 7 Fixed scroll 8 Orbiting scroll 9 Anti-rotation mechanism 25 Step surface 26, 27, 28 Bolt A Compression mechanism part C Clearance

Claims (7)

A compression mechanism that is driven by a first container divided portion in which a stator of an electric motor in which a rotor and a stator are opposed to each other via a circumferential gap is bolted and stored in an axial direction, and a drive shaft connected to the rotor A compressor having a second container divided portion in which the portion is fixedly stored,
The bolting portion between the stator and the first container split portion is configured to be adjustable in radial direction by a clearance perpendicular to an axis provided between the stator and the first container split portion, and The stator is fixed to the first container dividing portion in a state where the runout relative to the compression mechanism is adjusted;
A compressor in which the first container divided portion and the second container divided portion are bolted in the axial direction. The compressor according to claim 1, wherein the compression mechanism section is a scroll compression mechanism. The compression mechanism portion is bolted in the axial direction in a state where the fixed scroll and the bearing member slidably hold the orbiting scroll and the rotation preventing member that prevents the orbiting scroll from rotating. The compressor according to claim 2, wherein the two container division parts are bolted in the axial direction. The compressor according to any one of claims 1 to 3, wherein the compression mechanism portion protruding from the second container divided portion is fitted to the first container divided portion without play in a direction perpendicular to the axis. A compression mechanism that is driven by a first container divided portion in which a stator of an electric motor in which a rotor and a stator are opposed to each other via a circumferential gap is bolted and stored in an axial direction, and a drive shaft connected to the rotor A method of assembling a compressor having a second container division portion in which a portion is fixedly stored,
The position of the stator and the compression mechanism is adjusted by adjusting the position using a clearance in a direction perpendicular to the axis of the stator and the first container divided portion, and the stator is moved to the first container divided portion. A method of assembling the compressor, wherein the first container divided portion and the second container divided portion are bolted in the axial direction. A method of assembling a compressor in which a scroll type compression mechanism and an electric motor that drives the compression mechanism via a drive shaft are housed in a container,
The motor stator and the compression mechanism are axially bolted to each of the first and second container divided parts that are bolted to each other in the axial direction,
In order to integrate these first and second container division parts by bolting in the axial direction,
By adjusting the position of the stator using the clearance in the direction perpendicular to the axis of the first container division part, the center deflection of the compression mechanism part bolted to the second container division part is adjusted,
The compression mechanism portion is configured such that the fixed scroll of the scroll compression mechanism is bolted to the bearing member of the drive shaft in the axial direction and the orbiting scroll and the orbiting scroll between the orbiting scroll and the bearing member are fixed between the bearing member and the fixed scroll. A compressor assembling method comprising assembling a compressor by bolting to a second container in an axial direction separately from the bolting in a state where a rotation preventing member for preventing rotation is sandwiched. The compression mechanism portion protruding from the second container divided portions first container divided portion fitted without play in the axial direction perpendicular claim for positioning of the compression mechanism portion and the first container divided portion 5 Or a method for assembling the compressor according to 6 ;

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