JP7378264B2 - Scroll compressor, cycle device, and scroll compressor assembly method - Google Patents

Description

The present application relates to a scroll compressor, a cycle device, and a method for assembling the scroll compressor.

Conventionally, the method for assembling a scroll compressor is to combine a movable scroll, a crankshaft that engages with the movable scroll, and a housing member that constitutes a bearing for the crankshaft, and then position the fixed scroll in the following two steps. A fixed scroll positioning method has been proposed.
First positioning step: After positioning the fixed scroll on the housing member in the circumferential direction using the positioning pin, and fixing the fixed scroll to the housing member using the fastening means, the positioning pin is extracted.
Second positioning process The fixation by the fastening means is released while the fixed scroll is pressed against the housing member, and the fixed scroll is positioned in the X-axis direction and the Y-axis direction (see, for example, Patent Document 1).

Patent No. 4735674

The assembly method disclosed in Patent Document 1 requires the steps of inserting and removing positioning pins and tightening and loosening bolts during assembly, and there are problems in that it takes time to position the fixed scroll and there are variations in assembly accuracy. Ta.

The present application discloses a technique for solving the above problems, and aims to provide a scroll compressor, a cycle device, and a method for assembling the scroll compressor that are easy to assemble and have high assembly accuracy.

The scroll compressor disclosed in this application includes:
On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. assembled ,
The main frame reference hole is arranged offset in the Z direction from a portion where the main frame contacts the main shell .
Furthermore, the scroll compressor disclosed in this application is
On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. It is assembled,
The pair of fixed scroll reference holes and the pair of main frame reference holes do not overlap when viewed from the Z-axis.

The cycle device disclosed in this application includes:
a scroll compressor;
a condenser that condenses the refrigerant compressed by the scroll compressor;
an expansion valve that reduces the pressure of the refrigerant condensed in the condenser;
an evaporator that evaporates the refrigerant whose pressure has been reduced by the expansion valve,
The refrigerant is circulated.

The method for assembling a scroll compressor disclosed in this application includes:
On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. A method of assembling an assembled scroll compressor,
a preparation step of setting the main shell on a workpiece installation stand of a three-dimensional measuring device with the main frame fixed to the inner wall surface of the main shell;
Applying a probe for measuring three-dimensional coordinates of the three-dimensional measuring device to at least three points on a flat surface perpendicular to the Z-axis of the main frame to measure the three-dimensional coordinates of each of the three points, a main frame reference plane setting step of setting a plane passing through the three measured points as a main frame reference plane;
The probe is inserted into one of the main frame reference holes perpendicularly to the main frame reference plane, and at least three of the wall surfaces of the main frame reference hole are located at the same depth from the edge of the main frame reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
The probe is inserted into the other main frame reference hole perpendicularly to the main frame reference plane, and at least three of the wall surfaces of the main frame reference hole are located at the same depth from the edge of the main frame reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
a main frame reference axis setting step of setting a straight line passing through the two calculated center coordinates of the two main frame reference holes as the main frame reference axis;
A main frame center coordinate calculation step of determining the center between the two main frame reference holes as the main frame center, and calculating the coordinates of the main frame center;
Applying the probe to at least three points on one surface of the fixed scroll at the position gripped by the chuck mechanism, the surface that should be the Z+ side surface or the Z- side surface after assembly, a fixed scroll reference plane setting step of measuring the three-dimensional coordinates of each of the three points and setting a plane passing through the three measured points as a fixed scroll reference plane;
At the position gripped by the chuck mechanism,
The probe is inserted into one of the fixed scroll reference holes perpendicularly to the fixed scroll reference plane, and at least three of the wall surfaces of the fixed scroll reference hole are located at the same depth from the edge of the fixed scroll reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
The probe is inserted into the other fixed scroll reference hole perpendicularly to the fixed scroll reference plane, and at least three of the wall surfaces of the fixed scroll reference hole are located at the same depth from the edge of the fixed scroll reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
a fixed scroll reference axis setting step of setting a straight line passing through the two calculated center coordinates of the two fixed scroll reference holes as a fixed scroll reference axis;
The center between the two fixed scroll reference holes is set as the fixed scroll center, and the fixed scroll center coordinate calculation step of calculating the coordinates of the fixed scroll center is such that the fixed scroll reference plane and the main frame reference plane are parallel to each other. a fixed scroll inclination adjustment step of adjusting the inclination angle and inclination direction of the fixed scroll;
a circumferential position adjustment step of rotating and positioning the fixed scroll in the circumferential direction so that the fixed scroll reference axis and the main frame reference axis form a predetermined angle θ when viewed from the Z direction;
After completing the fixed scroll inclination adjustment step and the circumferential position adjustment step, the fixed scroll is moved in parallel while maintaining its posture, and the XY coordinates of the center of the main frame and the center of the fixed scroll are aligned, and the main frame is adjusted. The fixed scroll fixing step is fixed within the shell.

According to the scroll compressor, cycle device, and method for assembling a scroll compressor disclosed in the present application, it is possible to obtain a scroll compressor, a cycle device, and a method for assembling a scroll compressor that are easy to assemble and have high assembly accuracy.

1 is a perspective view of a scroll compressor according to Embodiment 1. FIG. 1 is a longitudinal sectional view of a scroll compressor according to Embodiment 1. FIG. FIG. 2 is a perspective view of main parts of the main shell according to the first embodiment. 3 is an enlarged view of the main part of FIG. 2 according to the first embodiment. FIG. 5 is an enlarged view of a portion surrounded by a circle A in FIG. 4 according to Embodiment 1. FIG. 5 is an enlarged view of a portion surrounded by a circle B in FIG. 4 according to Embodiment 1. FIG. FIG. 2 is a perspective view of the main frame according to the first embodiment. FIG. 2 is a plan view of the main frame 2 according to the first embodiment. FIG. 2 is a plan view of main frame 2B according to the first embodiment. 1 is a perspective view of a fixed scroll according to Embodiment 1. FIG. 1 is a plan view of a fixed scroll according to Embodiment 1. FIG. 1 is a perspective view of an oscillating scroll according to Embodiment 1. FIG. 1 is a perspective view of an oscillating scroll according to Embodiment 1. FIG. 1 is a perspective view of an Oldham ring according to Embodiment 1. FIG. 1 is a perspective view of a crankshaft according to Embodiment 1. FIG. FIG. 2 is a perspective view of a bush according to the first embodiment. FIG. 3 is a plan view of the bush according to the first embodiment. FIG. 3 is a flow diagram showing steps from fixing the main frame to fixing the fixed scroll according to the first embodiment. FIG. 2 is a perspective view of a calibration work and a probe according to the first embodiment. FIG. 2 is a conceptual diagram showing a main frame and a fixed scroll during measurement of each reference axis according to the first embodiment. 7 is another example of a conceptual diagram showing a main frame and a fixed scroll during measurement of each reference axis according to the first embodiment. FIG. FIG. 3 is a conceptual diagram showing a state in which a fixed scroll reference plane is aligned with a main frame reference plane according to the first embodiment. FIG. 3 is a diagram showing the relationship between the main frame according to the first embodiment, a main frame reference plane, and a main frame reference axis. FIG. 3 is a diagram showing the relationship between the fixed scroll according to the first embodiment, a fixed scroll reference plane, and a fixed scroll reference axis. FIG. 2 is a sectional view of a main part of a scroll compressor being assembled according to a second embodiment. FIG. 20 is a diagram showing a state in which the shaft of FIG. 19 is rotated 180 degrees. FIG. 2 is a block diagram showing the configuration of a refrigeration cycle device 1000 according to a second embodiment.

Embodiment 1.
Hereinafter, a scroll compressor and a method for assembling the scroll compressor according to Embodiment 1 will be described using figures.
FIG. 1 is a perspective view of a scroll compressor 100 according to a first embodiment.
FIG. 2 is a longitudinal sectional view of the scroll compressor 100.
The scroll compressor 100 is a so-called vertical scroll compressor that is used with the central axis of the crankshaft 6 substantially perpendicular to the ground.
The scroll compressor 100 includes a shell 1 forming an outer shell of the scroll compressor 100, a main frame 2 disposed inside the shell 1, a compression mechanism section 3 that compresses refrigerant, and a drive mechanism that drives the compression mechanism section 3. 4, a subframe 5, a crankshaft 6 that transmits power from the drive mechanism section 4 to the compression mechanism section 3 via a bush 7, and a power supply section 8 that supplies power to the drive mechanism section 4.

In the following explanation, with the main frame 2 as a reference, the side where the compression mechanism section 3 is provided (the upper side of the paper in FIG. 2) is the Z+ side, and the side where the drive mechanism section 4 is provided (the lower side of the paper in FIG. 2) is the Z+ side. Set it to the Z- side. Further, the left-right direction of the paper in FIG. 2 is the X direction, and the direction from the front to the back of the paper is the Y direction. The crankshaft 6 is arranged parallel to the Z-axis.

The shell 1 is a casing made of metal and closed at both ends, and includes a hollow main shell 11, an upper shell 12 closed at the Z+ side, and a lower shell 13 closed at the Z- side.

The main shell 11 has a hollow cylindrical shape, and a suction pipe 14 is connected to its outer wall by brazing or the like. The suction pipe 14 is a pipe that introduces the refrigerant into the shell 1, and communicates with the inside of the main shell 11. The upper shell 12 has a substantially hemispherical shape, and the lower end of its side wall is connected to the upper end of the main shell 11 by welding or the like, and covers the upper opening of the main shell 11 .

A discharge pipe 15 is connected to the upper part of the upper shell 12 by brazing or the like. The discharge pipe 15 is a pipe that discharges the refrigerant to the outside of the shell 1 and communicates with the internal space of the shell 1 . The lower shell 13 has a substantially hemispherical shape, and the upper end of its side wall is connected to the lower end of the main shell 11 by welding or the like, and covers the lower opening of the main shell 11.

Note that the shell 1 is supported by a fixing base 16 having a plurality of screw holes. A plurality of screw holes (not shown) are formed in the fixing base 16, and by screwing screws into these screw holes, the scroll compressor 100 can be fixed to other members such as the casing of the outdoor unit. ing.

FIG. 3 is a perspective view of main parts of the main shell 11, and is a view of the main shell 11 viewed diagonally from the Z+ side.
FIG. 4 is an enlarged view of the main part of FIG. 2.
FIG. 5A is an enlarged view of the portion surrounded by a circle A in FIG. 4. FIG.
FIG. 5B is an enlarged view of the portion surrounded by circle B in FIG. 4. FIG.
A first stepped portion D1 in which the inner diameter of the main shell 11 is reduced is provided on the inner wall surface of the main shell 11 at a position separated from one end in the Z+ direction by a predetermined length toward the Z− side. .

Further, on the inner wall surface of the main shell 11, at a position separated from the first step portion D1 by a predetermined length in the Z-direction, there is a second step portion D2 in which the inner diameter of the main shell 11 is further reduced. It is provided.

Here, the inner wall surface with the same inner diameter from the Z+ side end of the main shell 11 to the first step portion D1 is called the first inner wall surface 11a, and the inner wall surface with the same inner diameter from the first step portion D1 to the second step portion D2. The second inner wall surface 11b is defined as the second inner wall surface 11b, and the inner wall surface having the same inner diameter on the Z- side than the second stepped portion D2 is defined as the third inner wall surface 11c. Therefore, the inner wall surface of the main shell 11 is formed in a step-like shape whose inner diameter decreases from the first inner wall surface 11a toward the Z-direction. Each surface forming the first step portion D1 and the second step portion D2 is perpendicular to the central axis of the main shell 11.

The second stepped portion D2 is used to determine the position of the main frame 2 in the Z direction by contacting the main frame 2, the details of which will be described later. Further, the first stepped portion D1 is used to determine the position of the fixed scroll in the Z direction by contacting at least a portion of the outer periphery of the fixed scroll 31, which will be described in detail later.

As shown in FIGS. 5A and 5B, a recess D1r and a recess D2r recessed outward in the radial direction are provided at the ends of the first inner wall surface 11a and the second inner wall surface 11b closest to the Z-side, respectively. . Thereby, the fixed scroll 31 and the main frame 2 can be reliably brought into contact with the first step portion D1 and the second step portion D2, respectively.

Next, the configuration of the main frame 2 will be explained using FIGS. 2, 4, 6, 7A, and 7B.
FIG. 6 is a perspective view of the main frame 2.
The main frame 2 is provided inside the shell 1. The main frame 2 is made of metal such as cast iron, and is a hollow frame with a cavity formed in the center. The main frame 2 includes a main body portion 21, a main bearing portion 22, and an oil return pipe 23.

As shown in FIG. 2, the main body portion 21 has a central portion penetrating in the Z direction, and the inner diameter decreases stepwise from the Z+ side to the Z− side. Here, the part with the largest inner diameter on the Z+ side is defined as the Oldham housing section 215, and the space from the Oldham housing section 215 on the Z- side is defined as the housing space 211. The Z- side of the housing space 211 is connected to the main bearing portion 22 having an even smaller inner diameter.

As shown in FIG. 6, an annular flat surface 212 perpendicular to the Z direction is formed on the Z+ side of the main body portion 21. Further, as shown in FIG. 4, a ring-shaped thrust plate 24 made of a steel sheet material such as valve steel is arranged on the flat surface 212. Therefore, in this embodiment, thrust plate 24 functions as a thrust bearing. Note that since the thrust plate 24 functions as a thrust bearing, a rotation stopper is required to suppress rotation. Although not shown here, for example, a protrusion thinner than the thickness of the thrust plate 24 may be provided on the flat surface 212 of the main frame 2 to suppress the rotation of the thrust plate 24. A conceivable structure is to form the two parts and fit them together.

As shown in FIG. 6, a cutout 213 is formed at the outer peripheral portion of the main frame 2 and at a position that does not overlap in the Z direction with the thrust plate 24 disposed on the flat surface 212. A suction port 213P is formed between this notch 213 and the main shell 11. The suction port 213P is a space that penetrates the main body portion 21 in the Z direction, that is, toward the upper shell 12 side and the lower shell 13 side. In addition, although two notches 213 are provided in FIG. 6, the number is not limited to this. Although the suction port 213P is formed between the notch 213 and the main shell 11, there is no problem even if a through hole is provided in the main body portion 21.

A pair of main frame reference holes 214 are formed in the flat surface 212 of the main frame 2 in order to take a reference when assembling the scroll compressor 100. The main frame reference holes 214 are holes each having a circular cross section perpendicular to the Z direction and provided at symmetrical positions with the center of the main frame 2 in between. The main frame reference hole 214 satisfies its function whether it is a blind hole or a through hole, but by making it a blind hole, the machining length of the hole is shortened, and the main frame reference hole 214 can be formed with higher precision. can do. Further, since the machining time for the main frame reference hole 214 can be shortened, manufacturing costs can be reduced.

A pair of first Oldham grooves 216 are formed at positions facing each other in the radial direction on an annular Oldham mounting surface 215s perpendicular to the Z direction that forms the Oldham housing portion 215. The first Oldham groove 216 is formed at a position where a straight line connecting the centers of the pair of first Oldham grooves 216 and a straight line connecting the centers of the pair of main frame reference holes 214 (main frame reference axis described later) overlap. has been done.

This makes it possible to suppress misalignment between the main frame reference axis and the first Oldham groove 216, thereby improving the processing and assembly accuracy of the product and providing a high-performance, high-efficiency scroll compressor. Note that in order to facilitate machining of the first Oldham groove 216, a counterbore 217 larger than the outer shape of the first Oldham groove 216 is formed in the flat surface 212.

A plurality of protrusions 218 protruding in the radial direction are formed on the outer circumferential surface of the main body portion 21 of the main frame 2 . When fixing the main frame 2 to the second inner wall surface 11b of the main shell 11 by press fitting, shrink fitting, etc., the outer peripheral surface of the protrusion 218 of the main frame 2 is brought into contact with the second inner wall surface 11b of the main shell 11, and the protrusion The position of the main frame 2 in the Z direction is determined by abutting the Z- side end face of the main frame 218 against the second stepped portion D2 formed in the main shell 11 described above. At this time, the center position (center position in the XY directions) of the main frame 2 is also determined.

Note that if the holding force for the main frame 2 is insufficient, the contact surface between the main shell 11 and the protrusion 218 may be further subjected to arc spot welding or the like. As described above, the main frame 2 can be held in the main shell 11 with the center of the main frame 2 in the XY directions and the position in the Z direction determined.

By the way, the protrusion 218 receives a force directed inward in the radial direction due to press fitting or shrink fitting. Therefore, in order to suppress deformation of the flat surface 212 due to this force, the protrusion 218 is formed at a position away from the flat surface 212 of the main frame 2 on the Z- side. Furthermore, as shown in FIG. 4, by forming the main frame reference hole 214 to be shifted toward the Z+ side with respect to the protrusion 218 that contacts the main shell 11, deformation of the main frame reference hole 214 due to this force can be suppressed. .

FIG. 7A is a plan view of the main frame 2 according to this embodiment.
FIG. 7B is a plan view of a main frame 2B that is a modified example of the main frame 2. FIG.
Furthermore, as shown in FIG. 7B, the main frame reference hole 214 may be arranged at a position where the protrusion 218 does not exist on the radially outer side thereof, that is, the main frame reference hole 214 does not overlap in the radial direction. As a result, the main frame reference hole 214 is not subjected to the force directed inward in the radial direction due to the press-fitting and shrink-fitting of the protrusion 218. Therefore, the precision of measurement and assembly, which will be described later, is improved, and a scroll compressor 100 with high performance and high efficiency can be obtained.

The main bearing part 22 shown in FIG. 6 is formed on the Z- side of the main body part 21, and a bearing hole 221 shown in FIG. 7A for inserting the bearing is formed inside thereof. The bearing hole 221 passes through the main bearing portion 22 in the vertical direction, and its Z+ side communicates with the accommodation space 211 .

The oil return pipe 23 shown in FIGS. 2 and 6 is a pipe for returning the lubricating oil accumulated in the accommodation space 211 to the oil reservoir inside the lower shell 13, and is formed to penetrate from the inside of the main frame 2 to the outside. It is inserted into the oil drain hole and fixed. In addition, although two oil return pipes 23 are provided in FIG. 6, the number is not limited to this.

Next, the compression mechanism section 3 will be explained using FIG. 2, FIG. 4, FIG. 8A, FIG. 8B, FIG. 9A, and FIG. 9B.
FIG. 8A is a perspective view of the fixed scroll 31, and is a view of the fixed scroll 31 viewed diagonally from the Z- side. For convenience of explanation, it is a perspective view of the fixed scroll 31 shown in FIG. 2 with its top and bottom reversed.
FIG. 8B is a plan view of the fixed scroll 31, and is a view of the fixed scroll viewed from the Z- side.
FIG. 9A is a perspective view of the swinging scroll 32, and is a view of the swinging scroll 32 viewed diagonally from the Z+ side.
FIG. 9B is a perspective view of the swinging scroll 32, and is a view of the swinging scroll 32 viewed diagonally from the Z- side.

The compression mechanism section 3 is a scroll compression mechanism that compresses refrigerant. The compression mechanism section 3 includes a fixed scroll 31 that is fixed and does not move, and an oscillating scroll 32 that revolves and swings relative to the fixed scroll.

The fixed scroll 31 is made of metal such as cast iron, and includes a first substrate 311 provided perpendicular to the Z-axis, and a first spiral body 312 provided on the Z- side surface 311d of the first substrate. The first substrate 311 has a disk shape, and a discharge port 313 penetrating in the Z-axis direction is formed in the center thereof. The first spiral body 312 protrudes from the Z-side surface 311d of the first substrate 311 in the Z-direction and forms a spiral wall.

The oscillating scroll 32 is made of metal such as aluminum, and includes a second substrate 321 provided perpendicularly to the Z axis, a second spiral body 322 provided on the Z+ side surface 321u of the second substrate, and a second substrate 321 provided on the Z+ side surface 321u of the second substrate. A cylindrical portion 323 protrudes in the Z-direction from the Z-side surface 321d. The second substrate 321 has a disk shape. The second spiral body 322 protrudes from the Z+ side surface 321u of the second substrate 321 in the Z+ direction, and forms a spiral wall. At least a part of the outer peripheral area of the Z-side surface 321d of the second board becomes a sliding surface 3211 with respect to the thrust plate 24 provided on the main frame 2. That is, the sliding surface 3211 is supported by the main frame 2 so as to be slidable with respect to the thrust plate 24.

The cylindrical portion 323 is a cylindrical boss formed to protrude from the center of the Z-side surface of the second substrate 321 toward the Z-side. Furthermore, a pair of second Oldham grooves 324 are provided on the Z- side surface 321d of the second substrate 321 with the cylindrical portion 323 in between. The second Oldham groove 324 is a groove having an elongated circular cross section perpendicular to the Z direction, and is provided at a position symmetrical to the center of the second substrate 321 . A line connecting the centers of the pair of second Oldham grooves 324 is perpendicular to a line connecting the centers of the pair of first Oldham grooves 216 when viewed in the Z direction.

As shown in FIGS. 8A and 9A, the winding direction of the first spiral body 312 with respect to the first substrate 311 and the winding direction of the second spiral body 322 with respect to the second substrate 321 are opposite directions. The second spiral body 322 is inserted into the internal space K1 formed by the first spiral body 312 and engaged with each other.

When the first spiral body 312 and the second spiral body 322 are combined, as shown in FIG. The spiral tip portion 322u on the Z+ side of the second spiral body 322 of the oscillating scroll 32 contacts the Z+ side surface 321u of the second substrate 321 of the scroll 32, and the Z− side surface 321u of the first substrate 311 of the fixed scroll 31 contacts It comes into contact with the side surface 311d. Therefore, the Z- side spiral tip 312d of the first spiral body 312 of the fixed scroll 31 and the Z+ side spiral tip 322u of the second spiral body 322 of the oscillating scroll 32 are filled with refrigerant. A sealing member Q is provided to suppress leakage.

A rocking bearing (not shown), a so-called journal bearing, which rotatably supports a slider 71 (described later) is provided on the inner circumferential surface of the cylindrical portion 323 so that its central axis is parallel to the central axis of the crankshaft 6. ing.

By interlocking the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the swinging scroll 32, a compression chamber 34 shown in FIG. 2 is formed in the internal space K1. When the orbiting scroll 32 revolves, the volume of the compression chamber 34 decreases from the outside to the inside in the radial direction. Therefore, the refrigerant taken in from the outer peripheral ends of the first spiral body 312 and the second spiral body 322 is gradually compressed in the compression chamber 34, which gradually contracts toward the center.

As shown in FIG. 2, the compression chamber 34 communicates with the discharge port 313 at the center of the fixed scroll 31. A muffler 35 having a discharge hole 351 is provided on the Z+ side surface of the fixed scroll 31, and a discharge valve 36 is also provided to periodically open and close the discharge hole 351 to prevent backflow of refrigerant. Therefore, the refrigerant compressed in the compression chamber 34 passes through the space within the upper shell 12 and is discharged from the discharge pipe 15 to the outside of the scroll compressor 100.

The fixed scroll 31 is positioned in the Z direction by bringing at least a portion of the outer peripheral edge of the Z-side surface 311d into contact with a first stepped portion D1 formed in the main shell 11. Further, in this state, the outer peripheral surface 311c of the first substrate 311 is shrink-fitted and fixed to the first inner wall surface 11a of the main shell 11, thereby determining the center position (XY direction position) of the fixed scroll 31. In this way, the fixed scroll 31 is held by the main shell 11 with its XYZ position determined. The fixed scroll 31 also has the function of separating the high-pressure part and the low-pressure part of the refrigerant inside the shell 1.

As shown in FIGS. 8A and 8B, a pair of fixed scroll reference holes 314 are formed in the Z-side surface 311d of the first substrate 311 of the fixed scroll 31 in order to take a reference during assembly. The fixed scroll reference holes 314 are holes each having a circular cross section perpendicular to the Z direction and provided at symmetrical positions with the center of the fixed scroll 31 interposed therebetween. As mentioned above, since the fixed scroll 31 has the function of separating the high pressure section and the low pressure section, the fixed scroll reference hole 314 needs to be a blind hole (non-through hole).

By forming a blind hole, the cutting length can be shortened, and the fixed scroll reference hole 314 can be formed with higher accuracy. Furthermore, since processing time is also shortened, manufacturing costs can be reduced.

Further, similarly to the main frame 2 described above, the outer circumferential surface 311c of the first substrate 311 receives a force inward in the radial direction due to shrink fitting. Therefore, as shown in FIG. 4, by forming the fixed scroll reference hole 314 shifted toward the Z- side (or the Z+ side) with respect to the outer circumferential surface 311c that contacts the main shell 11, the fixed scroll reference hole 314 suppresses deformation of This improves measurement and assembly accuracy, and provides a high-performance, high-efficiency scroll compressor 100.

FIG. 10 is a perspective view of the Oldham ring 33. The Oldham ring 33 is a member for preventing rotation of the orbiting scroll. The Oldham ring 33 includes an annular ring portion 331, a first key portion 332, and a second key portion 333, and is disposed in the Oldham housing portion 215 of the main frame 2.

The pair of first key parts 332 protrude from the ring part 331 to the Z-side and radially outward, are formed to face each other in the radial direction, and are accommodated in the pair of first Oldham grooves 216 of the main frame 2. be done.

Further, the pair of second key parts 333 protrude from the ring part 331 to the Z+ side and to the outside in the radial direction, and are formed to face each other in the radial direction. be accommodated in.

Although the details will be described later, when the crankshaft 6 having the eccentric shaft portion 62 rotates, the first key portion 332 is inserted into the first Oldham groove 216, the second key portion 333 is inserted into the second Oldham groove 324, Each slides in the radial direction. Thereby, the Oldham ring 33 prevents the swinging scroll 32 from rotating as the crankshaft 6 rotates.

The first Oldham groove 216 of the main frame 2 and the second Oldham groove 324 of the swinging scroll 32 are each formed with high precision by machining. Further, the Oldham ring 33 is also formed with high precision by machining or powder metallurgy. Thereby, the key portion of the Oldham ring 33 and the Oldham groove can be fitted with high precision, so that the position of the swinging scroll 32 with respect to the main frame 2 can be matched with high precision.

As shown in FIG. 2, the drive mechanism section 4 is provided on the Z- side of the main frame 2 inside the shell 1. The drive mechanism section 4 includes a stator 41 and a rotor 42. The stator 41 is formed into an annular shape, for example, by winding a winding wire through an insulating layer around an iron core formed by laminating a plurality of electromagnetic steel sheets. The stator 41 is fixed and supported inside the main shell 11 by shrink fitting or the like.

The rotor 42 includes a permanent magnet inside a cylindrical core made of a plurality of laminated electromagnetic steel plates, and has a through hole in the center for inserting a crankshaft 6, which will be described later. The outer circumferential surface of the rotor 42 is arranged with a predetermined gap maintained between the inner circumferential surface of the stator 41 and the inner circumferential surface of the stator 41 .

The subframe 5 is a frame made of metal such as cast iron, and is provided on the Z- side of the drive mechanism section 4 inside the shell 1. The subframe 5 is fixedly supported on the inner peripheral surface of the main shell 11 by shrink fitting, welding, or the like. The subframe 5 includes an auxiliary bearing portion 51 that rotatably supports the crankshaft 6, and an oil pump 52.

The sub-bearing part 51 is a ball bearing provided in the center of the sub-frame 5, and has a hole vertically penetrating in the center. The oil pump 52 is provided on the Z- side of the sub-bearing portion 51, and is arranged so that at least a portion thereof is immersed in the lubricating oil stored in the oil reservoir of the lower shell 13. Although FIG. 2 shows a ball bearing as an example of the sub-bearing portion 51, there is no problem in using a journal bearing, for example.

FIG. 11 is a perspective view of the crankshaft 6.
The crankshaft 6 is a long metal rod-shaped member, and is provided inside the shell 1. The crankshaft 6 includes a main shaft portion 61, an eccentric shaft portion 62 provided on the Z+ side of the main shaft portion 61 continuously with the main shaft portion 61, and a shaft extending through the main shaft portion 61 and the eccentric shaft portion 62 in the Z direction. An oil passage 63 is provided.

The main shaft portion 61 is a shaft that constitutes the main portion of the crankshaft 6, and is arranged so that its center axis coincides with the center axis of the main shell 11. A rotor 42 is fixed to the outer surface of the main shaft portion 61.

The eccentric shaft portion 62 is provided on the Z+ side of the main shaft portion 61 so that its central axis is eccentric in the radial direction with respect to the central axis of the main shaft portion 61. The oil passage 63 is provided to penetrate inside the main shaft portion 61 and the eccentric shaft portion 62 in the Z direction. In this crankshaft 6, the Z+ side end of the main shaft part 61 is inserted into the main bearing part 22 of the main frame 2, and the Z- side end part is inserted into the sub-bearing part 51 of the sub-frame 5 and fixed. , the eccentric shaft portion 62 is disposed within the cylinder of the cylindrical portion 323 of the swinging scroll 32 via the bush 7.

As shown in FIG. 2, a first balancer 64 is provided at the end of the main shaft portion 61 on the Z+ side. Further, a second balancer 65 is provided on the Z- side of the rotor 42 of the main shaft portion 61. It is set in.

FIG. 12A is a perspective view of the bush 7.
FIG. 12B is a plan view of the bush 7.
The bush 7 is made of metal such as iron, and is a connecting member that connects the oscillating scroll 32 and the eccentric shaft portion 62 of the crankshaft 6. In this embodiment, the bush 7 is composed of two parts, and includes a slider 71 and a balance weight 72.

The slider 71 is a cylindrical member with a flange formed on the Z-side, and has a through hole 71h in the center whose cross section perpendicular to the Z direction is an elongated hole whose longitudinal ends are semicircular. . The eccentric shaft portion 62 of the crankshaft 6 is inserted into this through hole 71h. Further, the slider 71 is inserted inside the cylindrical portion 323 of the swinging scroll 32.

The balance weight 72 is a member that has a substantially C-shape when viewed from the Z+ side, and includes a weight portion 72w protruding from an annular base portion 72b in the Z+ direction. The balance weight 72 is provided eccentrically with respect to the rotation center of the crankshaft 6 in order to offset the centrifugal force of the swinging scroll 32. The balance weight 72 is fitted, for example, to the collar of the slider 71 by a method such as shrink fitting. It should be noted that the bush 7 may be made into a single part, for example, by machining the slider 71 and the balance weight 72 into one piece.

As the crankshaft 6 rotates, centrifugal force acts on the swinging scroll 32. In addition, since the eccentric shaft portion 62 of the crankshaft 6 has a cylindrical shape and the through hole 71h has an elongated shape in the radial direction, the swinging scroll 32, together with the bush 7, passes through the eccentric shaft portion 62. It moves in the longitudinal direction (radial direction) of the hole 71h.

Thereby, the side surfaces of the second spiral body 322 of the swinging scroll 32 and the first spiral body 312 of the fixed scroll 31 are in reliable contact with each other, and the amount of refrigerant leaking from the compression chamber 34 can be reduced.

The power supply unit 8 shown in FIGS. 2 and 3 is a member that supplies power to the scroll compressor 100, and is provided on the outer peripheral surface of the main shell 11. The power feeding unit 8 includes a cover 81, a power feeding terminal 82, and wiring 83.

The cover 81 is an open member that protects the power supply terminal 82. The power supply terminal 82 is made of a metal member, and has one end provided inside the cover 81 and the other end provided inside the shell 1. The wiring 83 has one end connected to the power supply terminal 82 inside the shell 1, and the other end connected to the stator 41.

Lubricating oil is stored in the lower part of the shell 1 of the scroll compressor 100, that is, the lower shell 13, and is sucked up by the oil pump 52 mentioned above, passes through the oil passage 63 in the crankshaft 6, and is sent to the compression mechanism section 3, etc. Reduces wear between mechanically contacting parts, controls temperature of sliding parts, and improves sealing performance. The lubricating oil is, for example, a refrigerating machine oil containing ester-based synthetic oil, and is preferably an oil that has excellent lubricating properties, electrical insulation, stability, refrigerant solubility, low-temperature fluidity, etc., and has an appropriate viscosity.

The refrigerant is composed of, for example, a halogenated hydrocarbon having a carbon double bond, a halogenated hydrocarbon having no carbon double bond, a hydrocarbon, or a mixture thereof. Halogenated hydrocarbons having carbon double bonds include HFC (hydro fluoro carbon) refrigerants with zero ozone depletion potential, fluorocarbon-based low GWP (global warming potential) refrigerants, and have the chemical formula C3H2F4. Examples include tetrafluoropropenes such as HFO1234yf, HFO1234ze, and HFO1243zf.

Examples of halogenated hydrocarbons that do not have a carbon double bond include refrigerants in which R32 (difluoromethane), R41, and the like having the chemical formula CH2F2 are mixed. Examples of hydrocarbons include propane, propylene, etc., which are natural refrigerants. An example of the mixture is a mixed refrigerant in which R32, R41, etc. are mixed with HFO1234yf, HFO1234ze, HFO1243zf, etc.

Next, the operation of scroll compressor 100 will be explained. When the power supply terminal 82 of the power supply section 8 is energized, torque is generated in the rotor 42, and the crankshaft 6 rotates accordingly. The rotation of the crankshaft 6 is transmitted to the swing scroll 32 via the eccentric shaft portion 62 and the bush 7.

The oscillating scroll 32 to which the rotational driving force has been transmitted is restricted from rotating by the Oldham ring 33, so that it performs an eccentric orbital motion with respect to the fixed scroll 31. At this time, the Z- side surface of the orbiting scroll 32 slides on the thrust plate 24.

The refrigerant sucked into the shell 1 from the suction pipe 14 with the oscillating movement of the oscillating scroll 32 passes through the suction port 213P formed between the main frame 2 and the main shell 11 to become the refrigerant shown in FIG. It reaches the intake space 37 and is taken into the compression chamber 34 formed by the fixed scroll 31 and the swinging scroll 32. Then, as the refrigerant moves from the outer circumference toward the center as the orbiting scroll 32 eccentrically revolves, its volume is reduced and compressed.

During eccentric orbital movement of the swinging scroll 32, the swinging scroll 32 moves in the radial direction together with the bushing 7 due to its own centrifugal force, and part of the side wall surfaces of the second spiral body 322 and the first spiral body 312 They come into close contact with each other. The refrigerant compressed in this way reaches the discharge hole 351 of the fixed scroll 31 from the discharge port 313 of the fixed scroll 31, enters the upper shell 12 against the discharge valve 36, and is discharged from the discharge pipe 15 to the outside of the shell 1. be done.

Next, a method of aligning the main frame 2 and fixed scroll 31 and assembling them into the main shell 11 will be described.
FIG. 13 is a flowchart showing a procedure for assembling each component from the main frame 2 to the fixed scroll 31 into the main shell 11.

In order to assemble the compression mechanism section 3 of the scroll compressor 100, it is necessary to accurately arrange the main frame 2 and the fixed scroll 31 inside the main shell 11.

At this time, alignment of the main frame 2 and the fixed scroll 31 in the circumferential direction is particularly important. That is, it is important that the main frame 2 and the fixed scroll 31 are arranged in parallel, and also that the fixed scroll 31 is positioned relative to the main frame 2 in the circumferential direction. In order to align the two parts, set the position of the reference plane and reference axis of each part on the three-dimensional coordinates at the prepared position, and then assemble them by aligning them with a jig or equipment. There is a need.

First, a method for setting the positions of the main frame reference plane 2a and the main frame reference axis 2b of the main frame 2 on the three-dimensional coordinates will be explained using FIGS. 7A, 13, 14, and 15.
FIG. 13 is a flowchart showing the steps from fixing the main frame 2 to fixing the fixed scroll 31.
FIG. 14 is a perspective view of the calibration work 9 and the probe S.
FIG. 15 is a conceptual diagram showing the main frame 2 and fixed scroll 31 during measurement of each reference axis.

First, the main frame 2 is press-fitted into the second inner wall surface 11b of the main shell 11, shrink-fitted, etc., and fixed in contact with the second stepped portion D2, and then the main shell 11 is placed on a workpiece installation stand (not shown) of a three-dimensional measuring device. (Step S001: Preparation process). The main frame 2 can be fixed at a generally accurate position by fixing it along the second stepped portion D2.

In order to specify the positions of the main frame reference plane 2a of the main frame 2, the main frame reference axis 2b, the fixed scroll reference plane 31a of the fixed scroll 31, and the fixed scroll reference axis 31b on three-dimensional coordinates, the position of the workpiece is three-dimensionally A probe S of a three-dimensional measurement device that can be specified on coordinates is used. Note that the position may be specified using not only the probe S but also image processing of a camera.

The probe S may cause variations in measurement results due to factors such as individual differences and mounting conditions. Therefore, before using the measuring device, it is necessary to calibrate the tip position of the probe and set the origin of the three-dimensional coordinates of the measuring device.

This calibration work is performed using the same calibration work 9 for each probe used to measure the three-dimensional coordinates of each position of the main frame 2 and fixed scroll 31. Note that if the calibration work 9 itself is moved, the calibration result will change due to the influence of the installation location and the seating surface of the installation part, so it is necessary to fix the calibration work 9 within the equipment. An outline of the calibration work 9 will be explained using FIG. 14.

The calibration work 9 has a hole 92 for calculating the origin. The hole 92 is placed exactly in the Z direction of the measuring device. The probe S is applied to at least three points on the edge of the hole 92, and the three-dimensional coordinates of each of the three points are measured. Then, the center coordinates of a circle passing through the three measured points are calibrated to the origin O (step S002: probe calibration step).

The calibration work for each probe used to set the main frame reference plane 2a and main frame reference axis 2b of the main frame 2, and the fixed scroll reference plane 31a and fixed scroll reference axis 31b of the fixed scroll 31 is performed in the same way. By using the calibration work 9, it is possible to eliminate factors of variation such as individual differences between the probes S and the installation state. This improves the adjustment accuracy of the circumferential position between the fixed scroll 31 and the main frame 2, allowing the circumferential position of both parts to be aligned with high precision, improving measurement and assembly accuracy, and achieving high performance. , a highly efficient scroll compressor 100 can be obtained.

Next, in the following procedure, the positions of the main frame reference plane 2a and the main frame reference axis 2b of the main frame 2 are set on the three-dimensional coordinates of the measuring device. As described above, two main frame reference holes 214 are provided in the flat surface 212 of the main frame 2 to obtain the main frame reference axis 2b during assembly. Therefore, the plane including the flat surface 212 is set as the main frame reference plane 2a, and the straight line connecting the centers of the two main frame reference holes 214 is set as the main frame reference axis 2b, and their respective positions are set on three-dimensional coordinates.

Specifically, first, the probe S is applied to at least three arbitrary points on the flat surface 212, the three-dimensional coordinates of each of the three points are measured, and a plane passing through the three measured points is set as the main frame. The reference plane 2a is set (step S003: main frame reference plane setting step). Next, the probe S is inserted into one of the main frame reference holes 214 perpendicularly to the main frame reference plane 2a, and applied to at least three points on the wall surface of the main frame reference hole 214 that are at the same depth from the edge. Then, measure the three-dimensional coordinates of each of the three points. Then, the center coordinates of a circle passing through the three measured points are calculated.

Next, for the other main frame reference hole 214, the center coordinates of a circle passing through the three measured points are calculated in the same manner. A straight line passing through the calculated two center coordinates of the two main frame reference holes 214 is set as the main frame reference axis 2b (step S004: main frame reference axis setting step). Further, the center between the two main frame reference holes 214 is defined as the main frame center 2O, and its coordinates are calculated (step S005: main frame center coordinate calculation step).

Note that one main frame reference hole 214 used for setting the main frame reference axis 2b on the three-dimensional coordinates may be omitted and a bearing hole 221 or the like may be used instead. However, if the main frame reference holes 214 are formed at two locations on the outer peripheral edge of the flat surface 212 as in this embodiment, the main frame reference axis 2b can be set at two separate points. Since calculation errors are reduced, measurement and assembly accuracy is improved, and a scroll compressor 100 with higher performance and efficiency can be obtained.

Further, as in this embodiment, if the main frame reference hole 214 used to set the main frame reference axis 2b is formed on the flat surface 212 from which the main frame reference plane 2a is obtained, the main frame reference hole 214 The moving distance of the blade used for machining and the probe S used for measuring coordinates becomes shorter. Thereby, processing and measurement accuracy are improved, and a scroll compressor 100 with high performance and high efficiency can be obtained. Furthermore, since processing and measurement time are also shortened, assembly and manufacturing time are reduced, and an inexpensive scroll compressor 100 can be obtained.

Next, as shown in FIG. 15, outside the main shell 11, the positions of the fixed scroll reference plane 31a and the fixed scroll reference axis 31b of the fixed scroll 31 at the position gripped by the chuck mechanism T are determined on the three-dimensional coordinates of the measuring device. A method for setting the value will be explained using FIG. 8B and FIG. 15. First, as in the case of the main frame reference plane 2a, the probe S is applied to at least three points on the surface that is to become the Z-side surface 311d of the fixed scroll 31, and the three-dimensional coordinates of each of the three points are measured. Then, a plane passing through the three measured points is set as the fixed scroll reference plane 31a (step S006: fixed scroll reference plane setting step).

Next, at the position gripped by the chuck mechanism T, as in the case of the main frame reference shaft 2b, one fixed scroll reference hole 314 provided in the fixed scroll 31 is probed perpendicularly to the fixed scroll reference plane 31a. S is inserted and applied to at least three points on the wall surface of the fixed scroll reference hole 314 at the same depth from the edge, and the three-dimensional coordinates of each of the three points are measured. Then, the center coordinates of a circle passing through the three measured points are calculated.

Next, for the other fixed scroll reference hole 314, the center coordinates of a circle passing through the three measured points are calculated in the same manner. A straight line passing through the calculated two center coordinates of the two fixed scroll reference holes 314 is set as the fixed scroll reference axis 31b (step S007: fixed scroll reference axis setting step). Further, the center between the two fixed scroll reference holes 314 is defined as the fixed scroll center 31O, and its coordinates are calculated (step S008: fixed scroll center coordinate calculation step).

As with the main frame reference hole 214, the fixed scroll reference hole 314 can be formed at two locations on the outer peripheral edge of the first substrate 311, and the fixed scroll reference axis 31b can be set at two separate points, improving measurement and assembly accuracy. is improved, and a scroll compressor 100 with even higher performance and efficiency can be obtained.

Furthermore, if the fixed scroll reference hole 314 used to set the fixed scroll reference axis 31b is formed on the Z-side surface 311d of the first substrate 311, the moving distance of the blade used for processing and the probe used for measurement is shortened. Become. Thereby, processing and measurement accuracy are improved, and a scroll compressor 100 with high performance and high efficiency can be obtained. Furthermore, since processing and measurement time are also shortened, assembly and manufacturing time are reduced, and an inexpensive scroll compressor 100 can be obtained.

FIG. 16 is another example of a conceptual diagram showing the main frame 2 and fixed scroll 31 during measurement of each reference axis.
As shown in FIG. 16, the fixed scroll reference hole 314 of the fixed scroll 31 is formed on the Z+ side surface 311u of the first substrate 311, and the fixed scroll reference plane 31a and fixed scroll reference axis 31b are set from this surface 311u. Good too.

FIG. 17 is a conceptual diagram showing a state in which the fixed scroll reference plane 31a is aligned with the main frame reference plane 2a.
Next, as shown in FIG. 17, the fixed scroll reference plane 31a (the surface including the surface 311d) of the fixed scroll 31 and the main frame reference plane 2a (the surface including the flat surface 212) of the main frame 2 are made parallel to each other. The tilt angle and tilt direction of the gripped fixed scroll 31 are adjusted by the chuck mechanism T that can be moved to the target position in conjunction with the measuring device (step S009: fixed scroll tilt adjustment step). Note that this step does not need to be performed by moving the fixed scroll 31 directly above the main frame 2 as shown in FIG. 17, but may be performed at the position shown in FIG. 15 where it is first gripped by the chuck mechanism T.

FIG. 18A is a diagram showing the relationship between the main frame 2 according to the first embodiment, the main frame reference plane 2a, and the main frame reference axis 2b.
FIG. 18B is a diagram showing the relationship between the fixed scroll 31, the fixed scroll reference plane 3a, and the fixed scroll reference axis 31b.
Furthermore, the fixed scroll 31 is rotated in the circumferential direction and positioned so that the fixed scroll reference axis 31b of the fixed scroll 31 and the main frame reference axis 2b of the main frame 2 form a predetermined angle θ when viewed from the Z direction. (Step S010: circumferential position adjustment step). In order to accurately match this angle θ, it is important to adjust the inclination of the fixed scroll 31 in step S009, which is the previous step, so that the fixed scroll reference plane 31a is parallel to the main frame reference plane 2a. Become.

Note that when adjusting the angle, it is not necessary to match the fixed scroll reference axis 31b of the fixed scroll 31 and the main frame reference axis 2b of the main frame 2 (the angle of both reference axes becomes 0°), and This can be done by taking the location into consideration and setting the matching angle arbitrarily.

After the inclination adjustment and circumferential position adjustment of the fixed scroll 31 are completed, the movable parts, such as the Oldham ring 33, the thrust plate 24, the bush 7, and the swinging scroll 32, are assembled in this order (Step S011: Movable part assembly step) ). First, the first key portion 332 of the Oldham ring 33 is inserted into the first Oldham groove 216 of the main frame 2.

Next, the thrust plate 24 is placed on the flat surface 212 of the main frame 2. Next, the bush 7 is inserted into the eccentric shaft portion 62 of the crankshaft 6. Next, the outer periphery 712 of the slider 71 is inserted into the cylindrical portion 323 of the swinging scroll 32, and at the same time, the second key portion 333 of the Oldham ring 33 is inserted into the second Oldham groove 324.

After the movable part of the compression mechanism part 3 is assembled in this way, the upper end part of the main shell 11 is heated. Then, the fixed scroll 31 is moved in parallel while maintaining its posture, and the XY coordinates of the main frame center 2O and the fixed scroll center 31O are made to match (overlapping in the Z direction). In this state, the fixed scroll 31 is inserted into the main shell 11 in the Z-direction until at least a part (somewhere) of the outer circumferential edge of the Z-side surface 311d contacts the first stepped portion D1, and the shrink fitting is performed. (Step S012: Fixed scroll fixing step).

Thereby, the positions of the main frame 2 and the fixed scroll 31 in the circumferential direction can be aligned with high precision. The circumferential positions of the main frame 2 and the swinging scroll 32 can be adjusted via the Oldham ring 33, so the circumferential positions of the fixed scroll 31 and the swinging scroll 32 can be adjusted with precision via the main frame 2. This means that they can be matched well.

Next, a method of manufacturing the parts of the scroll compressor 100 other than those described above will be described.
The parts explained below are performed before the parts explained so far.
First, a sheet steel material is formed into a tubular shape by rolls or presses, and the seams are connected by welding to produce a welded steel pipe.The suction pipe 14 is brazed to this, the power supply part 8 is attached, and the main A shell 11 is manufactured.

Subsequently, by cutting the inner wall surface of the main shell 11 to a predetermined depth in the radial direction, a first stepped portion D1 and a second stepped portion D2 are formed so that the inner diameter decreases in two steps in the Z+ direction. do. As a result of this cutting process, the radially outer ends of the first stepped portion D1 and the second stepped portion D2 may not be perpendicular to the inner wall surface of the main shell 11, and a rounded portion may remain. When this rounded portion is formed, even if the fixed scroll 31 is attempted to be placed on the first stepped portion D1, it may float without contacting the first stepped portion D1, and the accuracy of positioning may be reduced. The same applies to the second stepped portion D2.

Therefore, by processing the ends closest to Z+ of the first inner wall surface 11a and the second inner wall surface 11b, a recess D1r and a recess D2r that are recessed outward in the radial direction are formed. The recessed portion D1r and the recessed portion D2r are provided by a so-called smoothing process in which curved surfaces that tend to occur at the radially outer ends of the first stepped portion D1 and the second stepped portion D2 are removed by cutting.

By forming the recessed portion D1r, the fixed scroll 31 reliably contacts the first stepped portion D1, so that positioning accuracy can be improved. This also applies to the second stepped portion D2, and the positioning accuracy of the main frame 2 can be improved.

Next, the stator 41 is inserted from the Z- side of the main shell 11 formed as described above, and is firmly supported inside the main shell 11 by shrink fitting or the like. Subsequently, the subframe 5 is inserted from the Z + side of the main shell 11 and fixed and supported on the Z - side inner peripheral surface of the main shell 11 by shrink fitting, welding, or the like.

Next, the crankshaft 6 to which the rotor 42 is fixed is inserted from the Z + side of the main shell 11, and the Z- side end of the main shaft portion 61 is inserted into the sub-bearing portion 51 of the subframe 5 and fixed. do.

Next, the main frame 2 is inserted and fixed as described above. At this time, the Z + end of the main shaft portion 61 of the crankshaft 6 is simultaneously inserted into the bearing hole 221 of the main frame 2 . In this state, the center position of the main frame 2 (the center position in the XY direction) is determined by shrink-fitting the protrusion 218 on the outer peripheral surface of the main frame 2 to the second inner wall surface 11b and fixing it by arc spot welding or the like.

From this state, the fixed scroll 31 is positioned and assembled with respect to the main frame 2 described above.

Finally, after inserting the upper shell 12 from the Z+ side of the main shell 11, the main shell 11 and the upper shell 12 are fixed by welding or the like. By the manufacturing method described above, the fixed scroll 31 can be placed parallel to the main frame 2 without fitting intermediate members for positioning such as bolts and pins into the main frame reference hole 214 and the fixed scroll reference hole 314. , the circumferential position can be adjusted to the optimum position and fixed.

According to the scroll compressor 100 and the method for assembling the scroll compressor 100 according to the first embodiment, intermediate members such as bolts and pins are not used for positioning, so the scroll compressor 100 and the scroll compressor are easy to assemble and have high assembly accuracy. 100 assembly methods are available.

In addition, the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the oscillating scroll 32 are enlarged and arranged in the space where intermediate members such as bolts and pins, which were necessary in the conventional technology, were arranged. Since the volume of the compression chamber 34 can be increased, it is possible to obtain a large-capacity scroll compressor 100 with an increased refrigerant discharge capacity relative to the size of the device.

Furthermore, since the main frame reference hole is a blind hole, the machining length of the hole is shortened, and a highly accurate hole can be formed. Furthermore, since the time required for hole machining can be shortened, the manufacturing cost of the scroll compressor can be reduced.

Furthermore, since the main frame reference hole is disposed offset in the Z direction from the portion where the main frame contacts the main shell, deformation of the main frame reference hole when fixing the main frame to the main shell is prevented. It can be suppressed. This improves the precision of measurement and assembly, making it possible to obtain a high-performance, high-efficiency scroll compressor 100.

Further, the main frame includes a plurality of protrusions that protrude in the radial direction on the outer circumferential surface.
By shifting the position of the protrusion and the position of the main frame reference hole in the Z direction, deformation of the main frame reference hole when fixing the main frame to the main shell can be similarly suppressed.

Further, the main frame reference hole is provided in a position that does not overlap with the protrusion in the radial direction. Thereby, deformation of the main frame reference hole can be further suppressed.

Further, in the scroll compressor 100, the inner diameter of the main shell is reduced at a position on the Z− side from one end in the Z+ direction on the inner wall surface of the main shell, and the inner diameter of the fixed scroll is reduced. It includes a first step part that determines the position in the Z direction,
A second step part is provided at a position apart from the first step part by a predetermined length in the Z-direction, the inner diameter of the main shell being further reduced and determining the position of the main frame in the Z direction. Thereby, the main frame can be fixed to the main shell with high precision in the Z direction, and the fixed position of the fixed scroll in the Z direction can be determined with high precision.

Further, at least one of the fixed scroll reference hole and the main frame reference hole is formed at the outer peripheral edge of each member. This allows the main frame reference axis 2b and the fixed scroll reference axis 31b to be set at two separate points, reducing calculation errors for each reference axis, improving measurement and assembly accuracy, and further improving performance and efficiency. A scroll compressor 100 can be obtained.

Further, the inner diameter of the main shell is reduced at a position on the inner wall surface of the main shell on the Z- side by a predetermined length from one end in the Z+ direction to determine the position of the fixed scroll in the Z direction. comprising a first step part;
A second step part is provided at a position apart from the first step part by a predetermined length in the Z direction, the inner diameter of the main shell is further reduced, and the second step part determines the position of the main frame in the Z direction,
In the preparation step, the main frame is fixed in contact with the second step portion,
In the fixed scroll fixing step, the fixed scroll is fixed with at least a portion of the fixed scroll in contact with the first stepped portion, so that the fixed scroll 31 is kept parallel to the main frame 2 inside the main shell 11. By moving the fixed scroll 31 in parallel and fixing it with one point of the fixed scroll 31 in contact with the second stepped portion D2, the fixed scroll can be fixed with higher precision.

Further, by using a plurality of the probes and setting the origin of the three-dimensional coordinates using the same calibration work that calibrates the origin of the probe, all the probes can be set to each other using a plurality of probes S. The reference axis and the reference plane can be measured in parallel with high precision.

Embodiment 2.
Hereinafter, a scroll compressor 100, a cycle device, and a method of assembling the scroll compressor 100 according to Embodiment 2 will be described using the drawings.
FIG. 19 is a sectional view of a main part of the scroll compressor 100 being assembled, and is a diagram for explaining a method of measuring the main frame reference plane 2a and the main frame reference axis 2b of the main frame 2.
FIG. 20 is a diagram showing a state in which the crankshaft 6 is rotated 180 degrees from the state shown in FIG. 19.

In scroll compressor 100 and its assembly method, components that are substantially the same as those in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted. Note that the method for assembling the scroll compressor 100 according to the second embodiment is to fix the main frame 2 to the second inner wall surface 11b of the main shell 11 by press fitting, shrink fitting, etc., and then swing the oscillating scroll 32 thereon. The only difference from the first embodiment is that the main frame reference plane 2a and the main frame reference axis 2b are set in a movable manner.

As shown in FIG. 19, when the swing scroll 32 is assembled into the main shell 11 before setting the main frame reference axis 2b of the main frame 2, one of the main frame reference holes 214 is hidden by the swing scroll 32. Put it away. Therefore, by gripping the Z- side end of the crankshaft 6 with the coupling C and rotating it using the motor 90 or the like, the swinging scroll 32 is revolved, and the main frame reference hole 214 is exposed on one side at a time. let

First, a method of setting the main frame reference plane 2a of the main frame 2 will be explained. In the process of revolving the swinging scroll 32 as described above, the measurement probe S is applied to at least three locations on the flat surface 212 to measure the coordinates, and the plane passing through these three points is set as the main frame reference plane 2a. .

Next, a method of setting the main frame reference axis 2b of the main frame 2 will be explained.
Insert the measurement probe S into one of the exposed main frame reference holes 214 perpendicularly to the main frame reference plane 2a, and insert at least three of the wall surfaces of the main frame reference hole 214 at the same depth from the edge. Measure the three-dimensional coordinates of each of the three points. Then, the center coordinates of a circle passing through the three measured points are calculated.

Next, the Z-side end of the crankshaft 6 is grabbed by the coupling C and rotated 180 degrees by the motor 90 or the like, thereby causing the swinging scroll 32 to revolve and exposing the other main frame reference hole 214. let

The measuring probe S is inserted into the other exposed main frame reference hole 214 and similarly applied to the three points to measure the three-dimensional coordinates of each of the three points. Then, the center coordinates of a circle passing through the three measured points are calculated. A straight line passing through the calculated center coordinates of the two main frame reference holes 214 is set as the main frame reference axis 2b.

In the second embodiment, it is necessary to cut out the thrust plate 24 in advance so that the flat surface 212 and the main frame reference hole 214 can be measured with a probe.

FIG. 20 is a block diagram showing the configuration of the refrigeration cycle device 1000.
By using the scroll compressor 100 described in Embodiments 1 and 2 in a refrigeration cycle device 1000 shown in FIG. 21, which includes a condenser 101, an expansion valve 102, and an evaporator 103 and circulates refrigerant. , a large-capacity, high-efficiency, low-cost refrigeration cycle device can be obtained. In addition, in Embodiment 2, although the example of the refrigeration cycle apparatus 1000 was shown, the structure is the same whether it is a refrigeration cycle apparatus or an air cooling cycle apparatus.

According to the method for assembling the scroll compressor 100 according to the second embodiment, after the main frame 2 is fixed in the main shell 11 and the swinging scroll 32 is assembled, the main frame reference plane 2a and the main frame reference axis 2b are set. can. This makes it possible to suppress contact of members and minute positional deviations due to vibrations during the assembly process of the compression chamber, thereby making it possible to obtain a high-performance, high-efficiency scroll compressor.

Note that the cross-sectional shapes of the reference holes formed in the main frame 2 and the fixed scroll 31 do not necessarily have to be circular, and may be polygonal without any problem.

Although this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may be applicable to a particular embodiment. The present invention is not limited to, and can be applied to the embodiments alone or in various combinations.
Therefore, countless variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, this includes cases where at least one component is modified, added, or omitted, and cases where at least one component is extracted and combined with components of other embodiments.

For example, in each of the above embodiments, the vertical scroll compressor 100 has been described, but the present invention can also be applied to a horizontal scroll compressor. In this case, even in the case of a horizontal scroll compressor, the side where the compression mechanism section is provided can be viewed as the Z+ side, and the side where the drive mechanism section is provided can be viewed as the Z+ side, with the main frame as a reference.
Furthermore, the invention is not limited to low-pressure shell type scroll compressors, but can also be applied to high-pressure shell type scroll compressors in which the pressure in the space within the main shell in which the drive mechanism is disposed is higher than the pressure in the refrigerant intake space.

100 scroll compressor, 1000 refrigeration cycle device, 101 condenser,
102 expansion valve, 103 evaporator, 1 shell, 11 main shell,
11a first inner wall surface, 11b second inner wall surface, 11c third inner wall surface,
12 upper shell, 13 lower shell, 14 suction pipe, 15 discharge pipe,
16 fixed base, 2 main frame, 21 main body, 211 accommodation space,
212 flat surface, 213 notch, 213P suction port,
214 Main frame reference hole,
215 Oldham storage section, 215s Oldham installation surface, 216 first Oldham groove,
217 counterbore, 218 protrusion, 22 main bearing part, 221 bearing hole, 23 oil return pipe,
24 Thrust plate, 2a Main frame reference plane,
2b main frame reference axis, 2B main frame, 2O main frame center,
3 compression mechanism section, 31 fixed scroll, 311 first substrate, 311c outer peripheral surface,
311d, 311u, 321d, 321u plane, 312 first spiral body,
312d tip, 313 discharge port, 314 fixed scroll reference hole,
31a fixed scroll reference plane, 31b fixed scroll reference axis,
31O fixed scroll center, 32 swinging scroll, 321 second substrate,
3211 sliding surface, 322 second spiral body, 322u tip, 323 cylindrical part,
324 second Oldham groove, 33 Oldham ring, 331 ring part,
332 first key part, 333 second key part, 34 compression chamber, 35 muffler,
351 discharge hole, 36 discharge valve, 37 refrigerant intake space, 3a fixed scroll reference plane, 4 drive mechanism section, 41 stator, 42 rotor, 5 subframe, 51 sub-bearing section, 52 oil pump, 6 crankshaft, 61 main shaft part, 62 eccentric shaft part,
63 oil passage, 64 first balancer, 65 second balancer, 7 bush,
71 slider, 712 outer periphery, 71h through hole, 72 balance weight,
72b base, 72w weight part, 8 power supply part, 81 cover, 82 power supply terminal,
83 Wiring, 9 Calibration work, 90 Motor, 92 Hole, A, B circle mark,
C coupling,
D1 first step part, D1r, D2r recess, D2 second step part, K1 internal space,
O origin, Q seal member, S probe, T chuck mechanism, θ angle.

Claims (14)

On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. assembled ,
In the scroll compressor, the main frame reference hole is disposed offset in the Z direction from a portion where the main frame contacts the main shell . On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. It is assembled,
In the scroll compressor, the pair of fixed scroll reference holes and the pair of main frame reference holes do not overlap when viewed from the Z-axis . The scroll compressor according to claim 1 or 2 , wherein the fixed scroll reference hole is a blind hole. The main frame reference hole and the fixed scroll reference hole are not fitted with a member for positioning the main frame reference hole and the fixed scroll reference hole , according to any one of claims 1 to 3. scroll compressor. The scroll compressor according to any one of claims 2 to 4 , wherein the main frame reference hole is disposed offset in the Z direction from a portion where the main frame contacts the main shell. The scroll compressor according to claim 1 or 5 , wherein the main frame includes a plurality of protrusions protruding in a radial direction on an outer circumferential surface. The scroll compressor according to claim 6 , wherein the main frame reference hole is provided in a position that does not overlap with the protrusion in the radial direction. The inner diameter of the main shell is reduced at a position on the inner wall surface of the main shell on the Z− side by a predetermined length from one end in the Z+ direction, and a first Equipped with a step part,
2. The main shell further has a smaller inner diameter, and further comprises a second step part located a predetermined length away from the first step part in the Z-direction and determines the position of the main frame in the Z direction. The scroll compressor according to any one of claims 1 to 7. The scroll compressor according to any one of claims 1 to 8 , wherein at least one of the fixed scroll reference hole or the main frame reference hole is formed at an outer peripheral edge of each member. A scroll compressor according to any one of claims 1 to 9 ,
a condenser that condenses the refrigerant compressed by the scroll compressor;
an expansion valve that reduces the pressure of the refrigerant condensed in the condenser;
an evaporator that evaporates the refrigerant whose pressure has been reduced by the expansion valve,
A cycle device that circulates the refrigerant. On three-dimensional coordinates with XYZ axes,
a fixed scroll having a first substrate perpendicular to the Z-axis, and a first spiral body protruding from the first substrate in the Z-direction and forming a spiral wall;
The oscillator includes a second substrate perpendicular to the Z-axis and a second spiral body protruding from the second substrate in the Z+ direction and forming a spiral wall, and constitutes a compression mechanism that compresses refrigerant together with the fixed scroll. dynamic scrolling,
a main frame that slidably holds the swinging scroll;
A cylindrical main shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside, and fixes the fixed scroll and the main frame,
The fixed scroll is provided with a pair of fixed scroll reference holes at symmetrical positions across the center of the fixed scroll,
The main frame includes a pair of main frame reference holes at symmetrical positions across the center of the main frame,
The center between the pair of fixed scroll reference holes and the center between the pair of main frame reference holes overlap in the Z direction,
The fixed scroll reference axis that connects the centers of the pair of fixed scroll reference holes and the main frame reference axis that connects the centers of the pair of main frame reference holes are aligned at a predetermined angle θ when viewed from the Z axis. A method of assembling an assembled scroll compressor,
a preparation step of setting the main shell on a workpiece installation stand of a three-dimensional measuring device with the main frame fixed to the inner wall surface of the main shell;
Applying a probe for measuring three-dimensional coordinates of the three-dimensional measuring device to at least three points on a flat surface perpendicular to the Z-axis of the main frame to measure the three-dimensional coordinates of each of the three points, a main frame reference plane setting step of setting a plane passing through the three measured points as a main frame reference plane;
The probe is inserted into one of the main frame reference holes perpendicularly to the main frame reference plane, and at least three of the wall surfaces of the main frame reference hole are located at the same depth from the edge of the main frame reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
The probe is inserted into the other main frame reference hole perpendicularly to the main frame reference plane, and at least three of the wall surfaces of the main frame reference hole are located at the same depth from the edge of the main frame reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
a main frame reference axis setting step of setting a straight line passing through the two calculated center coordinates of the two main frame reference holes as the main frame reference axis;
A main frame center coordinate calculation step of determining the center between the two main frame reference holes as the main frame center, and calculating the coordinates of the main frame center;
Applying the probe to at least three points on one surface of the fixed scroll at the position gripped by the chuck mechanism, the surface that should be the Z+ side surface or the Z- side surface after assembly, a fixed scroll reference plane setting step of measuring the three-dimensional coordinates of each of the three points and setting a plane passing through the three measured points as a fixed scroll reference plane;
At the position gripped by the chuck mechanism,
The probe is inserted into one of the fixed scroll reference holes perpendicularly to the fixed scroll reference plane, and at least three of the wall surfaces of the fixed scroll reference hole are located at the same depth from the edge of the fixed scroll reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
The probe is inserted into the other fixed scroll reference hole perpendicularly to the fixed scroll reference plane, and at least three of the wall surfaces of the fixed scroll reference hole are located at the same depth from the edge of the fixed scroll reference hole. point, measure the three-dimensional coordinates of each of the three points, calculate the center coordinates of a circle passing through the three points,
a fixed scroll reference axis setting step of setting a straight line passing through the two calculated center coordinates of the two fixed scroll reference holes as a fixed scroll reference axis;
The center between the two fixed scroll reference holes is set as the fixed scroll center, and the fixed scroll center coordinate calculation step of calculating the coordinates of the fixed scroll center is such that the fixed scroll reference plane and the main frame reference plane are parallel to each other. a fixed scroll inclination adjustment step of adjusting the inclination angle and inclination direction of the fixed scroll;
a circumferential position adjustment step of rotating and positioning the fixed scroll in the circumferential direction so that the fixed scroll reference axis and the main frame reference axis form a predetermined angle θ when viewed from the Z direction;
After completing the fixed scroll inclination adjustment step and the circumferential position adjustment step, the fixed scroll is moved in parallel while maintaining its posture, and the XY coordinates of the center of the main frame and the center of the fixed scroll are aligned, and the main frame is adjusted. A method for assembling a scroll compressor, comprising a fixed scroll fixing step fixed within a shell. The inner diameter of the main shell is reduced at a position on the inner wall surface of the main shell on the Z− side by a predetermined length from one end in the Z+ direction, and a first Equipped with a step part,
A second step part is provided at a position apart from the first step part by a predetermined length in the Z direction, the inner diameter of the main shell is further reduced, and the second step part determines the position of the main frame in the Z direction,
In the preparation step, the main frame is fixed in contact with the second step portion,
12. The method for assembling a scroll compressor according to claim 11 , wherein in the fixed scroll fixing step, the fixed scroll is fixed with at least a portion thereof in contact with the first stepped portion. The scroll according to claim 11 or 12 , wherein a plurality of the probes are used, and all the probes set the origin of the three-dimensional coordinates using the same calibration work that calibrates the origin of the probe. How to assemble a compressor. After assembling the oscillating scroll on the main frame, the oscillating scroll is oscillated to perform the main frame reference plane setting step and the main frame reference axis setting step. 3. The method for assembling a scroll compressor according to any one of 3 .

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