WO2017077826A1

WO2017077826A1 - Scroll compressor and method for producing scroll compressor

Info

Publication number: WO2017077826A1
Application number: PCT/JP2016/080210
Authority: WO
Inventors: 洋悟高須; 創佐藤; 一樹高橋; 央幸木全
Original assignee: 三菱重工業株式会社
Priority date: 2015-11-05
Filing date: 2016-10-12
Publication date: 2017-05-11
Also published as: EP3315777A4; EP3315777A1; CN107923396A; EP3315777B1; JP2017089427A

Abstract

This scroll compressor (100) is provided with: an electric motor (3); a rotating shaft (4); a scroll compressor body; a main bearing; a sub-bearing (9B) that has a plurality of arms (79); a housing (1); a ring-shaped harness (40) that is fit into the inner peripheral surface (1A) of the housing (1); and a fixing portion (B) that fixes the arms (79) of the sub-bearing (9B) to the harness (40).

Description

Scroll compressor and method of manufacturing scroll compressor

The present invention relates to a scroll compressor and a method for manufacturing the scroll compressor.
This application claims priority on Japanese Patent Application No. 2015-217463 filed in Japan on November 5, 2015, the contents of which are incorporated herein by reference.

The scroll compressor includes a main shaft rotated by an electric motor, an eccentric shaft provided at a position offset with respect to the main shaft, an orbiting scroll supported by the eccentric shaft via a bearing device, and the orbiting scroll. Thus, a fixed scroll that forms a compression chamber with a variable volume and a housing that accommodates these members are provided. The orbiting scroll performs an orbiting motion around the axis of the main shaft without rotation. Thereby, the fluid led into the compression chamber is compressed. Here, the main shaft and the eccentric shaft are supported on both sides in the axial direction of the main shaft by a main bearing (upper bearing) and a sub-bearing (lower bearing) provided in the housing.

As a specific example of such a scroll compressor, an apparatus described in Patent Document 1 below is known. In the scroll compressor described in Patent Document 1, the second frame that supports the main shaft from below is fixed to the inner peripheral surface of the attachment by spot welding via a plurality of rib portions.

JP-A-5-231345

By the way, in the scroll compressor, the orbiting scroll performs the orbiting movement about the axis of the main axis by the eccentric shaft offset with respect to the main axis as described above, and compresses the refrigerant gas. For this reason, the load by the reaction force of refrigerant | coolant compression and the moment resulting from the member for adjusting the balance at the time of rotation, such as a rotor balance weight, is added to a main bearing and a sub bearing continuously. Furthermore, with the recent increase in the capacity and output of scroll compressors, the above load tends to increase.

However, in the scroll compressor described in Patent Document 1, since only one spot welding is performed on the rib portion, fatigue due to stress concentration occurs when an excessive load as described above is continuously applied. May cause destruction. This may hinder stable operation of the scroll compressor.

The present invention has been made in consideration of such circumstances, and an object thereof is to provide a scroll compressor capable of stable operation.

In order to solve the above problems, the present invention employs the following means.
(1) A scroll compressor according to a first aspect of the present invention includes an electric motor, a rotary shaft that is driven to rotate about an axis by the electric motor, a scroll compressor main body that is driven by rotation of the rotary shaft, and the electric motor. A main bearing that rotatably supports the rotating shaft between the scroll compressor body and the rotating shaft that supports the rotating shaft on the opposite side of the main bearing of the electric motor, extends in the radial direction, and is spaced in the circumferential direction. And a sub-bearing having a plurality of arms provided with a gap, and a cylindrical housing extending along the axis, and housing the electric motor, the rotating shaft, the scroll compressor body, the main bearing, and the sub-bearing A ring-shaped harness fitted on the inner peripheral surface of the housing, and a fixing portion for fixing the arm of the sub-bearing to the harness.

According to the configuration as described above, the arm is fixed to the harness by the fixing portion, and the harness is fitted to the inner peripheral surface of the housing. Thereby, even when vibration propagates from the scroll compressor body to the arm, the possibility that the arm and the harness fall off from the housing can be almost eliminated.

(2) The scroll compressor according to the second aspect of the present invention is the scroll compressor according to (1), wherein the fixed portion is formed in the first hole portion formed in the arm and the harness. The fixing bolt is inserted through the second hole portion, and the inner diameter of the first hole portion is larger than the outer diameter of the fixing bolt.

According to the configuration as described above, when the arm is fixed to the harness, the arm and the rotating shaft can be easily centered (coaxial).

(3) The scroll compressor according to the third aspect of the present invention is the scroll compressor according to (1) or (2), wherein the scroll compressor is interposed between the arm and the harness, so that A shim for positioning the arm is provided.

According to the configuration as described above, the arm can be easily positioned in the axial direction because the shim is interposed between the arm and the harness.

(4) A method for manufacturing a scroll compressor according to a fourth aspect of the present invention includes an electric motor, a rotary shaft that is driven to rotate about an axis by the electric motor, a scroll compressor main body that is driven by rotation of the rotary shaft, A main bearing that rotatably supports the rotating shaft between the electric motor and the scroll compressor body, and the rotating shaft that supports the rotating shaft on the opposite side of the main bearing of the electric motor, and extends in a radial direction to surround the main shaft. A sub bearing having a plurality of arms spaced in the direction, and a cylindrical shape extending along the axis, the motor, the rotary shaft, the scroll compressor body, the main bearing, and the sub bearing. A housing for housing, a ring-shaped harness fitted in an inner peripheral surface of the housing, and the arm of the sub bearing are fixed to the harness. A scroll compressor comprising: an assembly step of housing the electric motor, the rotary shaft, the scroll compressor main body, the main bearing in the housing; and an inner periphery of the housing. A shrink fitting process for fixing to the surface by shrink fitting, and a fixing process for fixing the sub bearing to the harness via the fixing portion.

According to the method as described above, the harness can be firmly fixed to the inner peripheral surface of the housing by shrink fitting.

According to the scroll compressor according to the present invention, stable operation can be realized over a long period of time.

It is sectional drawing of the scroll compressor which concerns on 1st embodiment of this invention. It is a principal part expanded sectional view of the scroll compressor which concerns on 1st embodiment of this invention. It is sectional drawing in the axial direction of the scroll compressor which concerns on 1st embodiment of this invention. It is a principal part expanded sectional view of the scroll compressor which concerns on 2nd embodiment of this invention. It is a figure which shows the modification of the scroll compressor which concerns on embodiment of this invention. It is a figure which shows the other modification of the scroll compressor which concerns on embodiment of this invention. It is process drawing which shows each process of the manufacturing method of the scroll compressor which concerns on embodiment of this invention.

[First embodiment]
A scroll compressor 100 according to a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the scroll compressor 100 includes a housing 1 that forms the outer shape of the apparatus, a drive unit 3 (electric motor 3) provided in the housing 1, and a rotary shaft 4 that is rotationally driven by the drive unit 3. A compressor 2 driven by the rotation of the rotary shaft 4 (scroll compressor body 2), a main bearing 9A and a sub-bearing 9B for rotatably supporting the rotary shaft 4, and a harness fitted in the housing 1 40 and a fixing portion (bolt B, see FIG. 2) for fixing the sub-bearing 9B to the harness 40.

The compression unit 2 and the drive unit 3 are connected to each other by a rotating shaft 4 extending along the axis O1. That is, the rotational energy by the drive unit 3 is immediately transmitted to the compression unit 2 through the rotation shaft 4. The compressing unit 2 compresses the working fluid with this rotational energy and discharges the working fluid to the outside in a high pressure state. The high-pressure working fluid is used as a refrigerant in, for example, an air conditioner. Hereinafter, the configuration of each unit will be described in detail.

The housing 1 includes a suction pipe 11 that sucks refrigerant gas as a working fluid from the outside, and a discharge pipe 12 that discharges the refrigerant gas that has become a high pressure state in the discharge chamber 67 after being compressed by the compression unit 2. Is provided.

The rotary shaft 4 has a cylindrical shape with the axis O1 as the center. The rotary shaft 4 includes a main bearing 9A provided at one end (first end) of the rotary shaft 4 in the direction of the axis O1, and a rotary shaft on the opposite side of the axis O1 direction when viewed from the main bearing 9A. 4 is rotatably supported in the housing 1 by a sub-bearing 9B provided at the other end portion (second end portion). The main bearing 9 A has a main bearing body 75 that rotatably supports the rotary shaft 4.

An eccentric shaft 5 having a columnar shape with an eccentric axis O2 different from the axis O1 as a center is provided at a position offset (eccentric) with respect to the axis O1 at one end of the rotary shaft 4. The eccentric axis O2 is parallel to the axis O1. The eccentric shaft 5 has a cylindrical shape protruding from the end of the rotating shaft 4 toward one side in the axis O1 direction. Therefore, the eccentric shaft 5 revolves around the axis O1 of the rotating shaft 4 in a state where the rotating shaft 4 rotates around the axis O1.

The main bearing 9A is provided with an Oldham ring 91 for restricting the rotation of the orbiting scroll 7 (rotation around the eccentric axis O2). Although not shown in detail, the Oldham ring 91 is formed with a protrusion that fits into a groove formed in the end plate 71 of the orbiting scroll 7.

The compression unit 2 has a fixed scroll 6 and a turning scroll 7. The discharge cover 8 is a substantially disk-shaped member that divides the space inside the housing 1 in the direction of the axis O1, and has a discharge port 68 that communicates the discharge chamber 67 and the compressed refrigerant gas at the center thereof. A discharge valve 66 is provided to prevent the refrigerant from flowing back from the high pressure side.

The fixed scroll 6 is a substantially disk-shaped member fixed inside the housing 1. The orbiting scroll 7 is opposed to the fixed scroll 6 from the direction of the axis O1 to form a compression chamber C therebetween. More specifically, the fixed scroll 6 includes a disc-shaped end plate 61 and a fixed wrap 62 erected on the other surface of the end plate 61 in the direction of the axis O1 from one side to the other side in the direction of the axis O1. And have. The end plate 61 extends along a plane that is substantially orthogonal to the axis O1. The fixed wrap 62 is a wall formed in a spiral shape when viewed from the direction of the axis O1. More specifically, the fixed wrap 62 is formed of a plate-like member wound around the center of the end plate 61. As an example, the fixed wrap 62 is preferably configured to form an involute curve centered on the axis O1 when viewed from the direction of the axis O1.

An outer peripheral wall 63 extending in a cylindrical shape along the outer periphery of the end plate 61 is formed on the radially outer side of the fixed wrap 62. Further, an annular flange portion 64 that extends from the radially inner side to the outer side is provided at the other edge of the outer peripheral wall 63 in the direction of the axis O1. The fixed scroll 6 is fixed to the main bearing 9 A with a bolt or the like through the flange portion 64. Further, a fixed scroll discharge port 65 is formed at the center of the spiral of the fixed scroll 6.

The orbiting scroll 7 has a disk-like end plate 71 and a spiral orbiting wrap 72 provided on one surface of the end plate 71 in the axis O1 direction. The swirl wrap 72 is also preferably configured to form an involute curve centered on the axis O2.

Furthermore, the turning wraps 72 are arranged so as to face the fixed wrap 62 from the direction of the axis O1 and overlap each other in the direction intersecting the axis O1. In other words, the fixed wrap 62 and the turning wrap 72 mesh with each other. A fixed space is formed between the fixed wrap 62 and the swivel wrap 72 in such a state of meshing. The volume of this space changes as the turning wrap 72 turns. Thereby, refrigerant gas can be compressed.

The orbiting scroll 7 configured as described above is connected to one side in the direction of the axis O1 of the rotary shaft 4 via the bush assembly 10. A cylindrical boss portion 73 is formed on the surface on the other side in the axis O1 direction of the end plate 71 of the turning wrap 72. The central axis of the boss 73 is coaxial with the axis O2. The eccentric shaft 5 formed on the rotating shaft 4 is fitted into the space inside the boss portion 73 from the direction of the axis O 1 via the bush assembly 10.

In addition, lubricating oil is supplied to the rotating shaft 4 (eccentric shaft 5) from the oil supply pump 80. This lubricating oil is lubricated between the bush 101 of the bush assembly 10 and the bearing 74 of the orbiting scroll 7 and then recovered downward in the housing 1.

Subsequently, a detailed configuration of the sub-bearing 9B will be described with reference to FIG. 2 or FIG. As shown in the figure, the sub-bearing 9B includes a sub-bearing body 76, a cylindrical holder portion 78 that supports the sub-bearing body 76 from the outer peripheral side, and a plurality of radially extending radially about the holder portion 78. And (three) arms 79.

The holder portion 78 is provided at a position that is generally coaxial with the axis O1. The arm 79 is a rod-shaped member that connects the inner peripheral surface 1 A of the housing 1 and the outer peripheral surface of the holder portion 78. The three arms 79 in this embodiment have substantially the same shape and dimensions. Further, a first hole 79H through which the fixing bolt B is inserted is formed at the radially outer end (outer peripheral end 79A) of the arm 79. The first hole 79H has an inner diameter slightly larger than the shaft diameter of the fixing bolt B. That is, when the fixing bolt B is inserted into the first hole 79H, a slight gap is formed between the outer peripheral surface of the fixing bolt B and the inner peripheral surface of the first hole 79H.

The sub-bearing 9 B configured as described above is fixed to the housing 1 via the harness 40. The harness 40 is a member that is generally formed in a ring shape centered on the axis O1. The outer diameter dimension of the harness 40 is set to be approximately equal to or slightly smaller than the inner diameter dimension of the housing 1.

The harness 40 is fixed to the inner peripheral surface of the housing 1 by shrink fitting. More specifically, the harness 40 is fixed to the housing 1 by the following method (manufacturing method of the scroll compressor). This method includes an assembly process, a shrink-fit process, and a fixing process. In the assembly process, the electric motor 3 (drive unit 3), the rotating shaft 4, the scroll compressor main body 2 (compression unit 2), and the main bearing 9A are accommodated in the housing 1. Next, in the shrink fitting process, the harness 40 is fixed to the inner peripheral surface of the housing 1 by shrink fitting.

More specifically, in the shrink fitting process, the housing 1 is thermally expanded by heating with a heat source, and the inner diameter of the housing 1 is expanded. The harness 40 is fitted inside the housing 1 in a state where the inner diameter of the housing 1 is enlarged. Thereafter, by removing the heat of the housing 1, the housing 1 contracts to restore the initial dimensions. Thereby, the harness 40 is firmly fixed on the inner peripheral side of the housing 1. Thereafter, the sub-bearing 9B is fixed to the harness 40 by a bolt B as a fixing portion described later (fixing step).

Here, the harness 40 is formed symmetrically with respect to the target axis Os extending in a horizontal plane intersecting the axis O1. Furthermore, the outer peripheral part of the harness 40 is made into the notch part 41 by notching over four places seeing from the axis line O1 direction. The four notches 41 are a first notch 41A and a second notch 41B that are line-symmetric with respect to the target axis Os. The first notch 41A is formed by a curved edge that curves inward in the radial direction from the outer peripheral edge (outer peripheral side) of the harness 40 as viewed from the direction of the axis O1. On the other hand, the second notch portion 41 B is formed by a linear edge that forms a string of the harness 40.

Furthermore, the harness 40 according to the present embodiment is formed with a plurality of second hole portions 40H for fixing the arm 79 of the sub bearing 9B. More specifically, the second hole 40H is formed at a position corresponding to the first hole 79H formed in each of the three arms 79 when viewed from the direction of the axis O1. After making the first hole 79H formed in the arm 79 correspond to the second hole 40H of the harness 40 fixed to the inner peripheral surface of the housing 1, the bolt B is inserted so as to penetrate both the holes 79H. Fastened with a nut or the like. In addition, in the state fixed in the housing 1, the harness 40 will be in the state which substantially contact | abutted from the axis line O1 direction with respect to the drive part 3 (electric motor 3) mentioned above.

By the way, as described above, the inner diameter of the first hole 79H formed in the arm 79 (sub bearing 9B) is slightly larger than the shaft diameter of the bolt B. Therefore, before the bolt B is completely tightened, there is a room for the sub bearing 9B to rotate slightly around the axis O1 with respect to the harness 40. Using this room, the center axis of the sub bearing 9B (sub bearing body 76) is aligned with the axis O1 of the housing 1 (rotating shaft 4). In other words, the sub bearing 9B can be centered with respect to the axis O1.

Next, the operation of the scroll compressor 100 according to this embodiment will be described. In starting the operation of the scroll compressor 100, first, the drive shaft 3 (electric motor 3) is energized, so that the rotary shaft 4 is rotationally driven around the axis O1.

As the rotary shaft 4 rotates, the eccentric shaft 5 revolves around the axis O1, and the orbiting scroll 7 attached thereto rotates around the axis O1. Here, the rotation of the orbiting scroll 7 is restricted by the Oldham ring 91 described above. Therefore, the orbiting scroll 7 makes a circular motion (turns) about the axis O1 of the rotating shaft 4 along the locus drawn by the eccentric axis O2. With this turning, the turning wrap 72 of the turning scroll 7 repeats continuous relative movement with respect to the fixed wrap 62 of the fixed scroll 6. By this relative movement, the volume of the compression chamber C formed between the fixed wrap 62 and the swirl wrap 72 changes over time.

Although not shown in detail, first, refrigerant gas as a working fluid is introduced into the compression chamber C from an opening generated on the radially outer side of the orbiting wrap 72 (and the fixed wrap 62) during the orbiting of the orbiting scroll 7. As the orbiting scroll 7 turns, the opening is closed. Thereby, the refrigerant gas is confined in the compression chamber C. Subsequently, as the orbiting scroll 7 is still revolving, the refrigerant gas moves toward the radially inner side (that is, the eccentric axis O2 side). At this time, since the swirl wrap 72 and the fixed wrap 62 have the above-described spiral shape, the volume of the compression chamber C formed by both decreases as it goes radially inward. Thereby, refrigerant gas is compressed. Finally, the refrigerant gas reaches the maximum pressure in the vicinity of the center portion of the orbiting scroll 7 (or the fixed scroll 6), and then is supplied to the outside through the fixed scroll discharge port 65 and the discharge pipe 12 of the housing 1.

Here, as described above, when the arm 79 in the sub-bearing 9B is directly fixed to the inner peripheral surface of the housing 1 by, for example, welding or the like, the arm 79 is used for compressing the refrigerant gas. Due to the reaction force and the moment of a member such as a balance weight that adjusts the balance during rotation, a load toward the inside or outside in the radial direction is applied with a sinusoidal increase / decrease.

When such a load is continuously applied, the fixing between the arm 79 and the housing 1 is weakened, which may hinder the operation of the apparatus. However, in the scroll compressor 100 according to the present embodiment, the arm 79 (sub bearing 9B) is fixed to the housing 1 via the harness 40 as described above. In particular, the harness 40 is fixed to the inner peripheral surface of the housing 1 by shrink fitting. That is, the outer peripheral surface of the harness 40 and the inner peripheral surface of the housing 1 are in contact with each other and are held in an interference fit state. Thereby, the arm 79 (sub bearing 9B) can be firmly and stably fixed to the inner peripheral surface 1A of the housing 1. Therefore, even when vibration propagates from the scroll compressor body to the arm, the possibility that the arm and the harness fall off from the housing can be almost eliminated.

Furthermore, according to the configuration as described above, the inner diameter of the first hole 79H formed in the arm 79 (sub bearing 9B) is slightly larger than the shaft diameter of the bolt B. In other words, before the bolt B is completely tightened, the sub-bearing 9B has room for slightly turning around the axis O1 with respect to the harness 40. Using this room, the center axis of the sub bearing 9B (sub bearing body 76) is aligned with the axis O1 of the housing 1 (rotating shaft 4). In other words, the sub bearing 9B can be centered with respect to the axis O1.

The first embodiment of the present invention has been described above with reference to the drawings. The above-described embodiment is merely an example, and various changes and the like can be added thereto.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. As shown in the figure, in the scroll compressor 200 according to the present embodiment, the shape of the arm 79 in the sub bearing 9B and the shape of the harness 40 are different from those in the first embodiment.

That is, in this embodiment, the region including the outer peripheral end 79A of the arm 79 is made thinner than the other part of the outer peripheral end 79A, thereby forming the thin portion 79B. Specifically, the end face of the arm 79 on one side in the axis O1 direction (the drive unit 3 side) is slightly counterbored toward the other side in the direction of the axis O1. As a result, a step is formed between the thin portion 79B and the other portion of the arm 79 (the portion on the inner side in the radial direction with respect to the axis O1).

In such a thin portion 79B, a very thin plate-shaped shim S is disposed as necessary. By interposing the shim S, it is possible to easily align the sub bearing 9B with respect to the harness 40 (alignment in the direction of the axis O1). In particular, when the harness 40 is fixed to the inner peripheral surface 1A of the housing 1 by shrink fitting, it may be difficult to precisely align the harness 40 in the direction of the axis O1. That is, it is conceivable that the position of the sub bearing 9B in the direction of the axis O1 may be shifted due to the harness 40 being slightly shifted from the housing 1 in the direction of the axis O1.

However, by disposing the shim S between the sub-bearing 9B and the harness 40 as described above, such a shift can be absorbed and the position of the sub-bearing 9B in the direction of the axis O1 can be optimized. In addition, it is desirable to prepare a plurality of types of shims S having different thickness dimensions, and to select and use an appropriate shim S appropriately according to the amount of deviation between the harness 40 and the sub-bearing 9B.

Furthermore, in the present embodiment, the radial dimension (thickness dimension) in the region on the one side in the axis O1 direction of the harness 40 is smaller than that in the first embodiment. More specifically, the constricted portion 40C is formed by setting the distance in the radial direction between the outer peripheral surface and the inner peripheral surface of the harness 40 to be smaller than that in the first embodiment. With this constricted portion 40C, a larger gap can be secured between the inner peripheral surface 40A of the harness 40 and the drive unit 3.

Here, lubricating oil is continuously supplied to the main bearing 9A and the sub-bearing 9B described above by the oil supply pump 80. The lubricating oil that has finished lubricating the main bearing 9A and the sub-bearing 9B flows toward the lower side of the housing 1 (that is, the other side in the direction of the axis O1) and is stored.

At this time, if the gap between the harness 40 and the drive unit 3 is not sufficiently large, there is a possibility of affecting the flow of the lubricating oil. However, in the present embodiment, since the constricted portion 40C is formed in the harness 40, the possibility that the harness 40 affects the flow state of the lubricating oil can be reduced.

In each of the above embodiments, the end surface on one side of the harness 40 in the direction of the axis O1 is in contact with the drive unit 3. However, the aspect of the harness 40 is not limited to this. For example, as shown in FIG. 5, a gap in the direction of the axis O 1 may be formed between the harness 40 and the drive unit 3. In this case, the possibility that the harness 40 hinders the flow of the lubricating oil can be further reduced.

Furthermore, in each of the above-described embodiments, the example in which the sub bearing 9B includes the three arms 79 has been described. However, the aspect of the sub bearing 9B is not limited to this, and for example, as shown in FIG. 6, four arms 79 extending radially from the holder portion 78 in the radial direction of the axis O1 may be provided. In this case, it is desirable that four second holes 40 H are formed in the harness 40 corresponding to the four arms 79.

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Compression part 3 ... Drive part (electric motor)
DESCRIPTION OF SYMBOLS 4 ... Rotating shaft 5 ... Eccentric shaft 6 ... Fixed scroll 7 ... Orbiting scroll 8 ... Discharge cover 9A ... Main bearing 9B ... Sub-bearing 10 ... Bushing assembly 11 ... Intake piping 12 ... Discharge piping 40 ... Harness 61 ... End plate 62 ... Fixed Lap 63 ... Outer peripheral wall 64 ... Flange part 65 ... Fixed scroll discharge port 66 ... Discharge valve 67 ... Discharge chamber 68 ... Discharge port 71 ... End plate 72 ... Swivel wrap 73 ... Boss part 74 ... Bearing 75 ... Main bearing body 76 ... Sub Bearing body 79 ... Arm 80 ... Oil pump 91 ... Oldham ring 92 ... Thrust bearing 93 ... Oil discharge hole 100 ... Scroll compressor 101 ... Bush C ... Compression chamber H1 ... Opening for welding H2, H21, H22 ... Hole O1 ... Axis O2 ... Eccentric axis
W ... welded part

Claims

An electric motor,
A rotating shaft that is driven to rotate about an axis by the electric motor;
A scroll compressor body driven by rotation of the rotating shaft;
A main bearing that rotatably supports the rotary shaft between the electric motor and the scroll compressor body;
A sub bearing having a plurality of arms that support the rotating shaft on the opposite side of the main bearing of the electric motor and extend in the radial direction and spaced apart in the circumferential direction;
A cylindrical shape extending along the axis, housing the electric motor, the rotary shaft, the scroll compressor body, the main bearing and the sub-bearing;
A ring-shaped harness fitted on the inner peripheral surface of the housing;
A fixing portion for fixing the arm of the sub bearing to the harness;
A scroll compressor comprising:
The fixing part is a fixing bolt inserted through a first hole part formed in the arm and a second hole part formed in the harness,
The scroll compressor according to claim 1, wherein an inner diameter of the first hole is larger than an outer diameter of the fixing bolt.
The scroll compressor according to claim 1, further comprising a shim that positions the arm in the axial direction by being interposed between the arm and the harness.
An electric motor,
A rotating shaft that is driven to rotate about an axis by the electric motor;
A scroll compressor body driven by rotation of the rotating shaft;
A main bearing that rotatably supports the rotary shaft between the electric motor and the scroll compressor body;
A sub bearing having a plurality of arms that support the rotating shaft on the opposite side of the main bearing of the electric motor and extend in the radial direction and spaced apart in the circumferential direction;
A housing extending along the axis, housing the electric motor, the rotating shaft, the scroll compressor body, the main bearing and the sub-bearing;
A ring-shaped harness fitted on the inner peripheral surface of the housing;
A fixing portion for fixing the arm of the sub bearing to the harness;
A method of manufacturing a scroll compressor comprising:
An assembly step of housing the electric motor, the rotary shaft, the scroll compressor body, and the main bearing in the housing;
A shrink fitting process for fixing the harness to the inner peripheral surface of the housing by shrink fitting;
A fixing step of fixing the sub bearing to the harness via the fixing portion. A method for manufacturing a scroll compressor.