JP2017137846A - Rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary machine of the invention capable of restricting the breakage of a housing caused by the thrust force of a rotation shaft in a structure in which the housing and a radial bearing are thermocompression-bonded.SOLUTION: A rotary machine comprises: a housing including a cylindrical side wall part 35, and a plurality of salients 35A provided on the inside of the side wall part 35; and a first radial bearing 32 that is accommodated in the housing and that includes a bearing body 65, and an extension part 66 extending from the bearing body 65 toward the side wall part 35 and arriving on the inside of the side wall part 35, in which the plurality of salients 35A and a plurality of recesses 69 are arrayed in a direction crossing a radial direction D and a thrust direction of a rotation shaft and/or the radial direction D; and the salient 35A is thermocompression-bonded to the plurality of recesses 69.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotary machine including a housing that accommodates a rotary shaft, and a radial bearing that supports the rotary shaft in a rotatable manner and is thermocompression bonded inside the housing.

  2. Description of the Related Art Conventionally, for example, there is a scroll compressor as one of rotating machines including a housing that accommodates a rotating shaft and a radial bearing that rotatably supports the rotating shaft and is fixed inside the housing.

The scroll compressor may have a housing including a plurality of protrusions housed in a recess disposed in the thrust direction of the rotating shaft, and a radial bearing disposed in line in the thrust direction and including the plurality of recesses. is there.
In the scroll compressor having such a configuration, the housing corresponding to the formation region of the plurality of protrusions and the radial bearing corresponding to the formation region of the plurality of recesses are thermocompression bonded, and the plurality of recesses are formed in the housing. The radial bearing is fixed to the housing by closely contacting the convex portion.
In the following description, the thermocompression bonded portion is referred to as a thermocompression bonding portion.
Conventionally, as a method of bringing a convex portion and a concave portion into close contact, there is a caulking fastening method disclosed in Patent Document 1, for example.

JP-A-3-99731

By the way, when the plurality of concave portions provided on the radial shaft are thermocompression bonded to the plurality of convex portions provided on the housing, residual tensile stress is generated in the thrust direction between the thermocompression bonding portions.
As described above, when a thrust force is applied by the rotating shaft in a state where the residual stress is generated in the thrust direction between the thermocompression bonding portions, there is a possibility that a portion of the housing where the residual stress is generated is cracked.

  Therefore, an object of the present invention is to provide a rotating machine capable of suppressing damage to the housing due to the thrust force of the rotating shaft in a structure in which the housing and the radial bearing are thermocompression bonded.

  In order to solve the above problems, a rotating machine according to one aspect of the present invention includes a rotating shaft that rotates around an axis, a cylindrical side wall, and a plurality of convex portions provided inside the side wall. Including a housing that accommodates the rotating shaft, a bearing body that is accommodated in the housing, and rotatably supports the rotating shaft, and extends in a direction from the bearing body toward the side wall, A radial bearing including an extending portion that reaches the inside of the side wall portion of the housing, wherein the extending portion accommodates the convex portion, includes a plurality of concave portions thermocompression-bonded with the convex portion, The convex portion and the plurality of concave portions are arranged in a direction intersecting with a radial direction and a thrust direction of the rotating shaft and / or arranged side by side in the radial direction.

According to the present invention, the thrust force by the rotating shaft is applied by arranging the plurality of concave portions and the plurality of convex portions to be thermocompression-bonded in the direction intersecting the radial direction and the thrust direction of the rotating shaft and / or in the radial direction. It is possible to generate residual stress due to thermocompression bonding in a direction intersecting and / or perpendicular to the direction (thrust direction).
Thereby, the damage of the housing resulting from the thrust force of a rotating shaft can be suppressed.
In addition, “thermocompression bonding” in the present invention refers to a state in which a concave portion is fitted in a convex portion in a compressed state after heating.

  In the rotating machine according to the aspect of the present invention, a plurality of the extending portions may be provided in a state of being separated from each other in the radial direction.

  Thus, even when a plurality of extending portions are provided in a state of being separated from each other in the radial direction, damage to the housing due to the thrust force of the rotating shaft can be suppressed.

  Moreover, in the rotary machine according to the aspect of the present invention, at least some of the plurality of recesses and the plurality of projections are provided on the radial bearing in the thrust direction of the rotation shaft. You may arrange | position in the position which passes the gravity center position and the virtual plane orthogonal to the said thrust direction passes.

  By adopting such a configuration, an axis orthogonal to the thrust direction when a thrust force is applied, compared to a case where a plurality of concave portions and a plurality of convex portions are arranged so as not to pass through the virtual plane. The resistance to the force applied in the rotation direction can be increased.

  In the rotary machine according to one aspect of the present invention, the plurality of concave portions and the plurality of convex portions may be arranged at positions that pass through the virtual plane.

  By adopting such a configuration, it is possible to further increase the resistance to the force applied in the rotational direction of the axis orthogonal to the thrust direction when the thrust force is applied.

  In the rotary machine according to the aspect of the present invention, the shape of the convex portion and the concave portion may be a shape extending in a direction intersecting the thrust direction and the radial direction.

In this way, by extending the convex portion and the concave portion in a direction intersecting the thrust direction and the radial direction, the contact area between the convex portion and the concave portion is increased, and is generated between the convex portions and between the concave portions. Residual stress concentration due to thermocompression bonding can be reduced.
In addition, since the contact area between the convex portion and the concave portion increases, it becomes possible to improve the adhesion between the housing and the radial bearing. Therefore, when the thrust force is applied, the radial bearing It can suppress that a position shifts.
Furthermore, not only the thrust force but also the resistance to the radial force resulting from the rotation of the rotating shaft can be enhanced.

  Further, in the rotating machine according to the aspect of the present invention, the plurality of recesses have the same projected area in the thrust direction of each of the recesses, and the projected areas in the radial direction of the respective recesses, The plurality of convex portions may have the same projected area in the thrust direction of each convex portion, and the projected area in the radial direction of each concave portion.

  By setting it as such a structure, the tolerance with respect to the radial force resulting from not only thrust force but rotation of a rotating shaft can further be improved.

  In the rotary machine according to one aspect of the present invention, the plurality of convex portions and the plurality of concave portions may include different shapes.

  Even in such a configuration, damage to the housing due to the thrust force of the rotating shaft can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the damage to the housing resulting from the thrust force of a rotating shaft can be suppressed in the structure where the housing and the radial bearing were thermocompression bonded.

It is a fragmentary sectional view of the rotary machine which concerns on the 1st Embodiment of this invention. It is the fragmentary sectional view which looked at only the side wall part of the 1st radial bearing and housing shown in FIG. It is a side view E ₁ view of the side wall portion surrounded by the region B shown in FIGS. It is a side view E ₂ view of the extending portion surrounded by a region B shown in FIGS. It is a side view of the side wall part and extension part for demonstrating the 1st modification of a some convex part and a some recessed part. It is a side view of the side wall part and extension part for demonstrating the 2nd modification of a some convex part and a some recessed part. It is the side view of a part of side wall part which comprises the rotary machine which concerns on the 2nd Embodiment of this invention, and a part of 2nd radial bearing, and is the figure seen from the side from the outer side of a side wall part. It is a side view of the side wall part and extension part for demonstrating the 1st modification of a some convex part and a some recessed part. It is a side view of the side wall part and extension part for demonstrating the 2nd modification of a some convex part and a some recessed part. It is a side view of the side wall part and extension part for demonstrating the 3rd modification of a some convex part and a some recessed part. It is a side view of the side wall part and extension part for demonstrating the 4th modification of a some convex part and a some recessed part.

  Embodiments to which the present invention is applied will be described below in detail with reference to the drawings. The drawings used in the following description are for explaining the configuration of the embodiment of the present invention, and the sizes, thicknesses, dimensions, and the like of the respective parts shown in the drawings are different from the dimensional relationships of the actual rotating machine. There is.

(First embodiment)
FIG. 1 is a partial cross-sectional view of a rotating machine according to a first embodiment of the present invention. In FIG. 1, a scroll compressor is illustrated as an example of the rotating machine 10. The cutting position in FIG. 1 corresponds to a CC line shown in FIG. 2 described later.
In FIG. 1, D is the radial direction of the rotating shaft 23 (hereinafter referred to as “radial direction D”), O ₁ is the axis of the rotating shaft 23 (hereinafter referred to as “axis O ₁ ”), and O ₂ is relative to the axis O _1. And an eccentric axis passing through the center of the parallel eccentric shaft 25 (hereinafter referred to as “eccentric axis O ₂ ”).
In FIG. 1, the X direction is parallel to the virtual plane F (the surface passing through the center of gravity G of the first radial bearing 32 and orthogonal to the Z direction), and in the Y direction and the Z direction. The direction orthogonal to the Y direction is parallel to the imaginary plane F and is orthogonal to the Z direction, and the Z direction indicates the thrust direction of the rotating shaft 23.
Further, in FIG. 1, only one extending portion 73 of the plurality of extending portions 73 is illustrated for the second radial bearing 34.

  FIG. 2 is a partial cross-sectional view of the first radial bearing and the side wall portion of the housing shown in FIG. In FIG. 2, for convenience of explanation, only the side wall portion 35 is shown cut along a virtual plane F shown in FIG. 1. 2, the same components as those in the structure shown in FIG.

  1 and 2, the rotary machine 10 includes a housing 11, a suction pipe 13, a discharge pipe 14, a discharge cover 16, a discharge valve 18, a discharge chamber 19, a compressor body 21, Compression chamber 22, rotary shaft 23, eccentric shaft 25, drive motor 26, bushing assembly 28, support plate 29, oil supply pump 31, first radial bearing 32, Oldham ring 33, 2 radial bearings 34.

Figure 3 is a side view E ₁ view of the side wall portion surrounded by the region B shown in FIGS. In FIG. 3, the extension portion 66 is illustrated by a dotted line for convenience of explanation. 3, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

With reference to FIGS. 1 to 3, the housing 11 includes a side wall portion 35, an upper cover portion 36, and a lower cover portion 38.
The side wall part 35 is a cylindrical member extending in the Z direction. The upper and lower ends of the side wall portion 35 are open ends. The side wall part 35 has a plurality of convex parts 35 </ b> A arranged in the radial direction D.
The plurality of convex portions 35 </ b> A protrude in a direction toward the extending portion 66. The plurality of convex portions 35A are arranged so that the virtual plane F passes through the center position. The plurality of convex portions 35 </ b> A are provided on the inside of the side wall portion 35 at a portion where the plurality of extending portions 66 constituting the first radial bearing 32 are thermocompression bonded.
Two convex portions 35 </ b> A are provided at a portion facing one extending portion 66. The shape of the plurality of convex portions 35A can be, for example, a shape obtained by cutting a part of a sphere. In this case, the shape of the plurality of convex portions 35A are in a state of ₁ viewed E, a circular (see FIG. 3).

The thermocompression bonding means a state in which the convex portion 35A is fitted in a concave portion 69 described later in a compressed state after heating. In the following description, a portion where the convex portion 35A and the concave portion 69 are thermocompression bonded may be referred to as a thermocompression bonding portion.
Further, a tensile residual stress is generated between the thermocompression bonding portions due to thermocompression bonding.

The upper cover part 36 is provided at the upper end of the side wall part 35 via the discharge cover 16 disposed at the open end on the upper end side of the side wall part 35.
The lower cover portion 38 is provided at the lower end of the side wall portion 35 so as to cover the open end on the lower end side of the side wall portion 35.

The suction pipe 13 is provided on the side wall portion 35. The suction pipe 13 is a pipe for sucking refrigerant gas as a working fluid into the housing 11 from the outside.
The discharge pipe 14 is provided at the upper end of the upper cover portion 36. The discharge pipe 14 discharges the refrigerant gas that has become a high pressure state in the discharge chamber 19 after being compressed by the compressor body 21.

The discharge cover 16 is provided between the upper cover part 36 and the upper end of the side wall part 35. The discharge cover 16 is a substantially disk-shaped member that divides a space formed in the housing 11 in the direction of the axis O ₁ (thrust direction) of the rotation shaft 23.
The discharge cover 16 has a discharge port 41 that communicates the discharge chamber 19 and the compressed refrigerant gas at the center thereof.

The discharge valve 18 is provided on the discharge cover 16. The discharge valve 18 is disposed so that a part thereof faces the discharge port 41. The discharge valve 18 is configured to be able to open and close the discharge port 41.
The discharge chamber 19 is a space defined by the upper cover part 36 and the discharge cover 16.

The compressor body 21 has a fixed scroll 43 and a turning scroll 45. The fixed scroll 43 is accommodated in the housing 11. The fixed scroll 43 is fixed to the first radial bearing 32 by a bolt or the like via the flange portion 52.
The fixed scroll 43 includes a disk-shaped end plate 47, a fixed wrap 49, an outer peripheral wall 51, and a flange portion 52.
The end plate 47 extends in a plane direction orthogonal to the axis O ₁ . The end plate 47 has a protrusion on its upper surface. The upper end of the protrusion is connected to the discharge cover 16. A fixed scroll discharge port 47 </ b> A that penetrates the end plate 47 is formed at the center of the end plate 47.

The fixed wrap 49 is erected in the direction of the axis O ₁ from the surface on one side of the end plate 47. The fixed wrap 49 is a wall formed in a spiral shape when viewed from the direction of the axis O ₁ . More specifically, the fixed wrap 49 is composed of a plate-like member wound around the center of the end plate 47.
Fixed wrap 49, for example, is preferably configured to form an involute curve about the said axis O ₁ as viewed from the axial O ₁ direction.

The outer peripheral wall 51 is provided on the radially outer side of the fixed wrap 49. The outer peripheral wall 51 extends in a cylindrical shape along the outer periphery of the end plate 47 with respect to the lower side of the end plate 47.
The flange portion 52 is provided at the lower end of the outer peripheral wall 51. The flange portion 52 is an annular member that spreads from the inside to the outside in the radial direction of the rotating shaft. The flange portion 52 is fixed to the first radial bearing 32 with bolts or the like.

  The orbiting scroll 45 includes a disk-shaped end plate 55, a spiral orbiting wrap 57, a boss portion 58, and a bearing 59. The end plate 55 is disposed below the fixed scroll 43 so as to face the lower surface of the fixed scroll 43. The end plate 55 is supported by the first radial bearing 32 on the lower surface side.

The turning wrap 57 is provided on the upper surface side of the end plate 55. The turning wrap 57 extends in the Z direction from the upper surface of the end plate 55. The swirl wraps 57 are arranged so as to overlap each other in the direction intersecting the axis O ₁ . In other words, the fixed wrap 49 and the turning wrap 57 mesh with each other.
Thus, the fixed wrap 49 and the turning wrap 57 mesh with each other, so that a fixed space is formed between the fixed wrap 49 and the turning wrap 57. The volume of the space changes as the turning wrap 57 turns. As a result, the refrigerant gas can be compressed.
The swirl wrap 57 is desirably configured to form an involute curve, for example.

The boss portion 58 has a cylindrical shape and is provided on the lower surface side of the end plate 55. The boss portion 58 protrudes downward (Z direction) of the end plate 55. The boss portion 58 is disposed so as to face the eccentric shaft 25.
The central axis of the boss portion 58 is coaxial with the axis O ₂ . The eccentric shaft 25 formed on the rotating shaft 23 is fitted into the space inside the boss portion 58 from the direction of the axis O ₁ via the bush assembly 28.

  The bearing 59 is provided inside the boss portion 58. The bearing 59 is disposed between a bush 62 and a boss portion 58 described later.

  The compressor main body 21 configured as described above compresses the working fluid by the rotational energy of the drive motor 26 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.

The compression chamber 22 is a space formed between the fixed scroll 43 and the orbiting scroll 45.
The rotating shaft 23 is accommodated in the housing 11 and extends in the Z direction. The rotating shaft 23 is rotatably supported by the first and second radial bearings 32 and 34. The shape of the rotating shaft 23 can be a cylindrical shape, for example.
The rotating shaft 23 is supplied with lubricating oil from the oil supply pump 80. Lubricating oil lubricates between the bushing 62 of the bushing assembly 28 and the bearing 59 of the orbiting scroll 45, moves downward in the housing 11, and is then collected.

The eccentric shaft 25 is provided at the upper end of the rotating shaft 23. The eccentric shaft 25 is arranged such that the eccentric axis O _2, which is a position offset (eccentric) with respect to the axis O ₁ , coincides with the center position of the eccentric shaft 25. The eccentric shaft 25 extends in the Z direction. The shape of the eccentric shaft 25 can be, for example, a cylindrical shape.
The eccentric shaft 25, in a state where the rotation shaft 23 is rotating in the axis O ₁ around revolve the axis O ₁ around the rotary shaft 23.

The drive motor 26 is disposed around the rotary shaft 23 located between the first radial bearing 32 and the second radial bearing 34. The drive motor 26 rotates the rotary shaft 23 in the radial direction D.
The rotational energy from the drive motor 26 is immediately transmitted to the compressor body 21 via the rotary shaft 23.

  The bush assembly 28 is provided between the eccentric shaft 25 and the first radial bearing 32. The bush assembly 28 includes a bush 62.

The support plate 29 is provided at a position facing the lower end of the rotation shaft 23. The support plate 29 supports the lower end of the rotating shaft 23 via a thrust bearing. A space is formed between the support plate 29 and the lower cover portion 37.
The oil supply pump 31 is provided on the lower surface side of the support plate 29. The oil supply pump 31 supplies lubricating oil to the rotating shaft 23.

FIG. 4 is a side view of the extending portion surrounded by the region B shown in FIGS. 1 and _{2 as} viewed from E2. 4, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

Referring to FIGS. 1, 2, and 4, the first radial bearing 32 is accommodated in the housing 11 and is thermocompression bonded to the housing 11.
The first radial bearing 32 includes a bearing body 65 and a plurality of extending portions 66 (three as an example in the figure).
The bearing body 65 is disposed so as to face the outer peripheral side surface of the upper end portion of the rotating shaft 23. The bearing body 65 supports the rotary shaft 23 in a rotatable manner.

The plurality of extending portions 66 are provided outside the bearing body 65 and are integrated with the bearing body 65. The plurality of extending portions 66 are arranged at a predetermined interval in the radial direction D.
The extending portion 66 extends from the bearing main body 65 in the direction toward the side wall portion 35 of the housing 11 and reaches the inside of the side wall portion 35 of the housing 11.
The extension part 66 has an extension part main body 68 and a plurality of recesses 69 (two in the case of FIGS. 2 and 4). The extension main body 68 extends from the bearing main body 65 in the direction toward the side wall 35 of the housing 11. The extension portion main body 68 has a surface 68 a that faces the inner surface of the side wall portion 35.

The plurality of concave portions 69 are portions that are thermocompression bonded to the convex portions 35 </ b> A formed on the side wall portion 35. The plurality of recesses 69 are provided on the surface 68 a of the extension part main body 68 and are arranged in the radial direction D.
In a state in which the first radial bearing 32 is thermocompression bonded to the side wall portion 35, the shape of the plurality of concave portions 69 is a shape that contacts the entire inner surface of the convex portion 35A.
For example, when the shape shown in FIG. 3 is used as the shape of the convex portion 35A, the shape of the plurality of concave portions 69 can be a shape obtained by cutting a part of a sphere with a plane.

Referring to FIG. 1, the Oldham ring 33 is provided on a first radial bearing 32. The Oldham ring 33 has a function of regulating the rotation (rotation around the eccentric axis O ₂ ) of the orbiting scroll 45.
The Oldham ring 33 has a protrusion (not shown) that fits into a groove formed in the end plate 55 of the orbiting scroll 45.

The second radial bearing 34 has a bearing body 72 and a plurality of extending portions 73 (only one is shown in FIG. 1).
The bearing body 72 is disposed so as to face the outer peripheral side surface of the lower end portion of the rotating shaft 23. The bearing body 72 supports the rotary shaft 23 in a rotatable manner.

The plurality of extending portions 73 are provided outside the bearing body 72 and are integrated with the bearing body 72. The plurality of extending portions 73 are arranged at a predetermined interval in the radial direction D.
The extending portion 73 extends from the bearing body 72 toward the side wall portion 35 of the housing 11 and reaches the inside of the side wall portion 35 of the housing 11. The extension 73 is thermocompression bonded to the housing 11.

  According to the rotating machine 10 of the first embodiment, the thrust force by the rotating shaft 23 is applied by arranging the plurality of concave portions 69 and the plurality of convex portions 35 to be thermocompression bonded in the radial direction D of the rotating shaft 23. It is possible to generate residual stress due to thermocompression bonding in a direction perpendicular to the direction (thrust direction) applied. Thereby, the damage of the housing 11 resulting from the thrust force of the rotating shaft 23 can be suppressed.

  Further, by disposing the plurality of concave portions 69 and the plurality of convex portions 35A at positions passing through the virtual plane F, when a thrust force is applied, it is applied in the rotation direction of the axis orthogonal to the thrust direction. Resistance to force can be further increased.

Furthermore, the shape of the plurality of recesses 69 is the same shape and a shape obtained by cutting a part of the sphere, the shape of the plurality of projections 35A is the same shape, and the shape corresponding to the shape of the recess 69, The projection area in the thrust direction and the projection area in the radial direction D of each of the plurality of recesses 69 can be made equal, and the projection area in the thrust direction and the projection area in the radial direction D of each of the plurality of projections 35A can be set. It can be made equal.
Thereby, not only the thrust force but also the resistance to the radial force caused by the rotation of the rotating shaft 23 can be increased.

  In FIG. 1, as an example, the case where a plurality of recesses 69 are provided only in the first radial bearing 32 has been described as an example. However, a plurality of extensions of the second radial bearing 34 may be provided as necessary. The part 73 may also be provided with a plurality of recesses 69, and the protrusions 35 </ b> A may be provided inside the housing 11 in contact with the plurality of recesses 69 provided in the plurality of extending parts 73.

  FIG. 5 is a side view of a side wall portion and an extending portion for explaining a first modified example of a plurality of convex portions and a plurality of concave portions. FIG. 5 is a side view of the housing 11 from the outside. In FIG. 5, the same components as those shown in FIGS. 3 and 4 are denoted by the same reference numerals.

In the first embodiment, as an example, a case where the plurality of convex portions 35A and the plurality of concave portions 69 are arranged in the radial direction D has been described as an example. For example, as illustrated in FIG. protrusions 35A and a plurality of recesses 69, may be arranged in a direction intersecting the radial direction D and the thrust direction (the extending direction of the axis O _1).
By disposing the plurality of convex portions 35A and the plurality of concave portions 69 at such positions, the housing 11 caused by the thrust force of the rotating shaft 23 in the structure in which the housing 11 and the first radial bearing 32 are thermocompression bonded. Can be prevented, and resistance to radial force can be increased.
In this case, a plurality of convex portions 35 </ b> A and a plurality of concave portions 69 may be arranged at positions close to the virtual plane F.

  In the first embodiment, as an example, the case where the three extending portions 66 are provided has been described as an example. However, the number of the extending portions 66 may be one or more, and may be three. It is not limited. In addition, what is necessary is just to provide a ring-shaped extension part, when using one extension part.

In the first embodiment, the case where the plurality of protrusions 35A have the same shape and the plurality of recesses 69 have the same shape has been described as an example. For example, the plurality of protrusions 35A And the shape of the plurality of recesses 69 may be different.
Even in such a configuration, damage to the housing 11 due to the thrust force of the rotating shaft 23 can be suppressed.

  Furthermore, in the first embodiment, a case where the plurality of convex portions 35A and the plurality of concave portions 69 are arranged so that the virtual plane F passes through a part of the plurality of convex portions 35A and the plurality of concave portions 69 is used. Although described as an example, the plurality of convex portions 35 </ b> A and the plurality of concave portions 69 may be arranged at positions shifted from the virtual plane F. In this case, it is preferable to arrange in the vicinity of the virtual plane F.

  FIG. 6 is a side view of a side wall portion and an extending portion for explaining a second modification of the plurality of convex portions and the plurality of concave portions. FIG. 6 is a side view of the housing 11 from the outside. In FIG. 6, the same components as those shown in FIGS. 3 and 4 are denoted by the same reference numerals.

As shown in FIG. 6, when four or more of the plurality of convex portions 35 </ b> A and the plurality of concave portions 69 are provided, one pair (two) of the convex portions 35 </ b> A and the concave portions 69 are arranged in the radial direction, it may be disposed in a direction intersecting the convex portion 35A and the recessed portion 69 of the other pair (2) in the radial direction D and the thrust direction (the extending direction of the axis O _1).
Even in such a case, an effect similar to that of the rotary machine 10 of the first embodiment can be obtained.
Further, when four or more convex portions 35A and concave portions 69 are provided, the four or more convex portions 35A and concave portions 69 may be arranged in a direction intersecting the radial direction D and the thrust direction (Z direction).

  Further, when four or more recesses 69 and projections 35A are arranged, at least a part of the recesses 69 and projections 35A may be arranged so as to pass through the virtual plane F.

  Compared to the case where the plurality of concave portions 69 and the plurality of convex portions 35A are arranged so as not to pass through the virtual plane F by arranging the four or more concave portions 69 and the convex portions 35A at such positions. When a force is applied, resistance to a force applied in the rotation direction of an axis orthogonal to the thrust direction can be increased.

(Second Embodiment)
FIG. 7 is a side view of a part of a side wall part and a part of a second radial bearing constituting a rotary machine according to a second embodiment of the present invention, and is a side view from the outside of the side wall part. is there. 7, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

  Referring to FIG. 7, the rotating machine according to the second embodiment of the present invention replaces the side wall 35 and the first radial bearing 32 provided in the rotating machine 10 of the first embodiment with a side wall. Except having 75 and the 1st radial bearing 76, it is set as the structure similar to the rotary machine 10. FIG.

The side wall part 75 has the same configuration as the side wall part 35 except that it has a plurality of convex parts 78 arranged in the radial direction D instead of the plurality of convex parts 35A constituting the side wall part 35.
The plurality of convex portions 78 have the same configuration except that the shape is different from the plurality of convex portions 35 </ b> A described in the first embodiment.
That is, the plurality of convex portions 78 are arranged such that the center position passes through the virtual plane F, similarly to the plurality of convex portions 35A. Further, two convex portions 78 are provided at a portion facing one extending portion 81 constituting the first radial bearing 76.

The shape of the plurality of convex portions 78 is a shape extending in a direction intersecting the thrust direction (direction in which the axis O ₁ extends) and the radial direction D.
The plurality of convex portions 78 are rounded at both ends (round shape). The angle formed between the extending direction (longitudinal direction) of the plurality of convex portions 78 and the virtual plane F is preferably set to 45 °, for example, but can be set as appropriate.

The first radial bearing 76 is the same as the first radial bearing 32 except that it has a plurality of recesses 83 arranged in the radial direction D instead of the plurality of recesses 69 constituting the first radial bearing 32. It is made into the composition.
The plurality of recesses 83 have the same configuration except that the shape is different from that of the plurality of recesses 69 described in the first embodiment.
That is, the plurality of recesses 83 are arranged such that the center position passes through the virtual plane F, similarly to the plurality of recesses 69.

The plurality of concave portions 83 are portions that are thermocompression bonded to the convex portions 78 formed on the side wall portions 75. In the following description, a portion where the concave portion 83 and the convex portion 78 are thermocompression bonded may be referred to as a thermocompression bonding portion.
The plurality of recesses 83 are provided on the surface 68 a of the extension body 68 and are arranged in the radial direction D. The plurality of concave portions 83 are provided at positions where the convex portions 78 can be accommodated.
In a state where the first radial bearing 76 is thermocompression bonded to the side wall portion 75, the shape of the plurality of concave portions 83 is a shape that contacts the entire inner surface of the convex portion 78.
That is, the shape of the plurality of recesses 83 is a shape extending in a direction intersecting the thrust direction (direction in which the axis O ₁ extends) and the radial direction D.

According to the rotary machine of the second embodiment, the plurality of convex portions 78 and the plurality of concave portions 83 are extended in a direction intersecting the thrust direction and the radial direction D, and the convex portions 78 and the concave portions 83 are formed. By increasing the contact area, it is possible to alleviate the concentration of residual stress caused by thermocompression generated between thermocompression bonding portions.
Further, since the contact area between the convex part 78 and the concave part 83 increases, it becomes possible to improve the adhesion between the side wall part 75 and the first radial bearing 76, so when receiving a thrust force It can suppress that the position of the 1st radial bearing 76 shifts | deviates with respect to the side wall part 75. FIG.
Furthermore, by extending the plurality of convex portions 78 and the plurality of concave portions 83 in a direction intersecting the thrust direction and the radial direction D, not only the thrust force but also the radial force resulting from the rotation of the rotating shaft. It is possible to increase the resistance to.

In the second embodiment, the plurality of recesses 83 have the same projection area in the thrust direction of each recess 83 and the projection area in the radial direction D of each recess 83, and the plurality of projections 78 are You may comprise so that the projection area in the thrust direction of each convex part 78 may become equal, and the projection area in the radial direction D of each convex part 78 may become equal.
By setting it as such a structure, the tolerance with respect to the radial force resulting from not only thrust force but rotation of a rotating shaft can further be improved.

  FIG. 8 is a side view of a side wall portion and an extending portion for explaining a first modified example of a plurality of convex portions and a plurality of concave portions. FIG. 8 is a side view of the side wall 75 from the outside. In FIG. 8, the same components as those in the structure shown in FIG.

In the second embodiment, as an example, the case where the plurality of convex portions 78 and the plurality of concave portions 83 are arranged in the radial direction D has been described as an example. For example, the first modification example illustrated in FIG. As described above, the plurality of convex portions 78 and the plurality of concave portions 83 may be arranged in a direction intersecting the radial direction D and the thrust direction (extending direction of the axis O ₁ ).
By arranging the plurality of convex portions 78 and the plurality of concave portions 83 at such positions, in the structure in which the side wall portion 75 and the first radial bearing 76 are thermocompression-bonded, While being able to suppress breakage, the resistance to radial force can be increased.
In this case, the plurality of protrusions 78 and the plurality of recesses 83 may be arranged so that the virtual plane F passes through a part of the plurality of protrusions 78 and the plurality of recesses 83.

  FIG. 9 is a side view of a side wall portion and an extending portion for explaining a second modification of the plurality of convex portions and the plurality of concave portions. FIG. 8 is a side view of the side wall 75 from the outside. In FIG. 8, the same components as those in the structure shown in FIG.

  In FIG. 8 described above, the case where the virtual plane F passes through a part of the plurality of protrusions 78 and a part of the plurality of recesses 83 in the radial direction D is described as an example. As in the second modification shown, in the radial direction D, a part of the plurality of protrusions 78 and a part of the plurality of recesses 83 do not pass through the virtual plane F, and the plurality of protrusions in the radial direction D A plurality of protrusions 78 and a plurality of recesses 83 may be arranged so that a part of 78 and a part of the plurality of recesses 83 do not overlap.

  FIG. 10 is a side view of a side wall portion and an extending portion for explaining a third modification of the plurality of convex portions and the plurality of concave portions. FIG. 10 is a side view of the side wall 75 from the outside. In FIG. 10, the same components as those of the structure shown in FIG.

  In the second embodiment, as an example, a case where a plurality of convex portions 78 and a plurality of concave portions 83 having the same shape are arranged at the same angle with respect to the thrust direction and the radial direction D is taken as an example. However, as in the third modification shown in FIG. 10, the convex portions 78 and 85 and the concave portions 83 and 86 having different shapes are provided, and the convex portions 78 and 85 and the concave portions 83 and 86 are formed at different inclination angles. It may be arranged.

  FIG. 11 is a side view of a side wall portion and an extending portion for explaining a fourth modification of the plurality of convex portions and the plurality of concave portions. FIG. 11 is a side view of the side wall 75 from the outside. In FIG. 11, the same components as those in the structure shown in FIG.

As in the fourth modification shown in FIG. 11, the projection areas in the thrust direction of the recesses 83 and 92 are equal, and the projection areas in the radial direction D of the recesses 83 and 92 are equal, and the thrust of the projections 78 and 91 is the same. The convex portions 78 and 91 and the concave portions 83 and 92 having different shapes so that the projected areas in the direction are equal and the projected areas in the radial direction D of the convex portions 78 and 91 are equal may be provided.
In this case, not only the thrust force but also the resistance against the radial force caused by the rotation of the rotating shaft can be further increased.

Further, the convex portions 78 and 85 and the concave portions 83 and 85 shown in FIG. 10 and the convex portions 78 and 91 and the concave portions 83 and 92 shown in FIG. 11 are arranged in a direction intersecting the thrust direction and the radial direction. Alternatively, it may be arranged at a position where the virtual plane F does not pass.
Furthermore, you may combine the convex part 78,85,91 and the recessed part 83,86,92 shown in FIGS.

Moreover, arbitrary 4 convex parts and concave parts are provided among the convex parts 78, 85, 91 and concave parts 83, 86, 92 shown in FIGS. 7 to 11, and one pair (two) of convex parts and concave parts are provided. is arranged in the radial direction, it may be disposed in a direction intersecting the peaks and valleys of the other pair (2) in the radial direction D and the thrust direction (the extending direction of the axis O _1).
Even in such a case, an effect similar to that of the rotating machine of the second embodiment can be obtained.

  Further, even when four or more convex portions and concave portions described in the second embodiment are arranged, it is preferable that at least some of the concave portions and convex portions are arranged so as to pass through the virtual plane F.

  By arranging four or more concave portions and convex portions at such positions, a thrust force is applied as compared to the case where the plural concave portions and the plurality of convex portions are arranged so as not to pass through the virtual plane F. It is possible to increase resistance to a force applied in the rotation direction of the axis perpendicular to the thrust direction.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.
For example, the convex portions 35A, 78, 85, 91 and the concave portions 69, 83, 86, 92 described in the first and second embodiments may be used in combination.

DESCRIPTION OF SYMBOLS 10 ... Rotary machine, 11 ... Housing, 13 ... Intake piping, 14 ... Discharge piping, 16 ... Discharge cover, 19 ... Discharge chamber, 18 ... Discharge valve, 21 ... Compressor body, 22 ... Compression chamber, 23 ... Rotating shaft, DESCRIPTION OF SYMBOLS 25 ... Eccentric shaft, 26 ... Drive motor, 28 ... Bush assembly, 29 ... Support plate, 31 ... Oil supply pump, 32, 76 ... 1st radial bearing, 33 ... Oldham ring, 34 ... 2nd radial bearing, 35 75 ... Side wall portion, 35A, 78, 85, 91 ... Projection portion, 36 ... Upper cover portion, 37 ... Lower cover portion, 41 ... Discharge port, 43 ... Fixed scroll, 45 ... Orbiting scroll, 47, 55 ... End plate 47A ... fixed scroll outlet,
49 ... fixed lap, 51 ... outer peripheral wall, 52 ... flange, 57 ... turning wrap, 58 ... boss, 59 ... bearing, 62 ... bush, 65, 72 ... bearing body, 66, 73, 81 ... extension, 68 ... extending portion main body, 68a ... surface, 69,83,86,92 ... recess, B ... area, D ... radial, F ... imaginary plane, G ... center-of-gravity position, O 1 _... axis, O 2 _... eccentric axis

Claims (7)

A rotation axis that rotates about an axis,
A housing that includes a cylindrical side wall portion and a plurality of convex portions provided on the inner side of the side wall portion and accommodates the rotating shaft;
A bearing main body housed in the housing and rotatably supporting the rotating shaft, and extending from the bearing main body in a direction toward the side wall portion and reaching the inner side of the side wall portion of the housing A radial bearing including a portion,
With
The extension part accommodates the convex part and includes a plurality of concave parts thermocompression-bonded with the convex part,
The rotating machine, wherein the plurality of convex portions and the plurality of concave portions are arranged in a direction intersecting with a radial direction and a thrust direction of the rotating shaft and / or arranged in the radial direction.   The rotating machine according to claim 1, wherein a plurality of the extending portions are provided in a state of being separated from each other in the radial direction.   Among the plurality of recesses and the plurality of projections, at least some of the recesses and the projections pass through the center of gravity of the radial bearing in the thrust direction of the rotating shaft and are orthogonal to the thrust direction. The rotating machine according to claim 1, wherein the rotating machine is disposed at a position through which a virtual plane passes.   The rotating machine according to claim 3, wherein the plurality of concave portions and the plurality of convex portions are arranged at positions passing through the virtual plane.   5. The rotation according to claim 1, wherein the shape of the convex portion and the concave portion is a shape extending in a direction intersecting the thrust direction and the radial direction. machine. The plurality of concave portions have the same projected area in the thrust direction of each of the concave portions, and the projected area in the radial direction of each of the concave portions,
6. The method according to claim 1, wherein the plurality of convex portions have the same projected area in the thrust direction of each convex portion, and the projected areas in the radial direction of each concave portion. A rotating machine according to claim 1.   The rotary machine according to any one of claims 1 to 6, wherein the plurality of convex portions and the plurality of concave portions include different shapes.

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