Rotary compressor bearing and compressor

Abstract

The application provides a rotary compressor bearing and a compressor, and relates to the technical field of compressors, and solves the technical problem that the bearing end surface is not capable of bearing the crankshaft due to the annular groove arranged on the bearing end surface, which is not conducive to the stable operation of the crankshaft. The rotary compressor bearing comprises a bearing main body and a bearing ring, an annular groove is arranged on the end surface of the bearing main body, and an annular boss is formed between the annular groove and the bearing hole of the bearing main body; the bearing ring is arranged on the annular boss, the top surface of the bearing ring away from the annular boss is flush with the end surface of the bearing main body, and a first sliding structure is arranged between the bearing ring and the annular boss. The application is used to provide a rotary compressor bearing and a compressor capable of increasing the bearing area between the bearing end surface and the thrust surface of the crankshaft, improving the bearing capacity of the bearing end surface to the crankshaft, and maintaining the stability of the operation of the crankshaft.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a rotary compressor bearing and a compressor. Background Technology

[0002] In a rotary compressor, the major and minor shafts of the crankshaft and the upper and lower bearings form a sliding bearing pair. The crankshaft is subjected to the load of the compressed gas, causing deformation. The roots of the major and minor shafts come into contact with the inner walls of the bearings, generating significant contact stress. To reduce the risk of abnormal wear caused by excessive contact stress, such as... Figure 1 As shown, a common practice is to set an annular groove on the bearing end face to increase the flexibility of the part in contact with the crankshaft, increase the contact area, reduce the contact stress at the root of the long and short shafts of the crankshaft, and reduce wear. However, the axial distribution of the contact stress P on the crankshaft surface is shown in the curve on the right. When the eccentric part of the crankshaft is subjected to a gas force F in the direction of the arrow to the right, the crankshaft undergoes bending deformation as shown in the figure. The edge of the crankshaft relief groove becomes the starting contact point between the crankshaft and the inner wall of the bearing. The load on the inner wall surface of the bearing on both sides above and below the starting contact point changes abruptly, causing the inner wall surface of the bearing to form a local concave point after the crankshaft is squeezed and deformed, resulting in contact stress concentration. The contact stress concentration at the starting contact point can easily cause abnormal wear of the crankshaft.

[0003] When an annular groove exists, stress concentration often occurs at the initial contact point between the crankshaft root and the inner wall of the bearing. An improvement scheme is provided in the prior art, such as... Figure 2 As shown, by lowering the inner wall of the bearing to the height of the initial contact point, stress concentration at the initial contact point can be avoided. However, this reduces the bearing area of ​​the bearing end face to the crankshaft thrust surface, resulting in insufficient bearing capacity of the bearing end face to the crankshaft, which is not conducive to the stable operation of the crankshaft. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary compressor bearing and compressor, thereby solving the technical problem in the prior art where the bearing end face, by providing an annular groove, easily leads to insufficient load-bearing capacity of the bearing end face on the crankshaft, which is detrimental to the stable operation of the crankshaft. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The rotary compressor bearing provided by the present invention includes a bearing body and a bearing ring. An annular groove is provided on the end face of the bearing body, and an annular boss is formed between the annular groove and the bearing hole of the bearing body.

[0007] The bearing ring is disposed on the annular boss, and the top surface of the bearing ring away from the annular boss is flush with the end face of the bearing body. A first sliding structure is provided between the bearing ring and the annular boss.

[0008] As an optional implementation, the bearing ring includes a support ring and a slip ring, the first sliding structure is disposed between the slip ring and the annular boss, and the second sliding structure is disposed between the slip ring and the support ring.

[0009] As an optional implementation, both the first sliding structure and the second sliding structure include a sliding protrusion and a sliding groove, wherein the sliding protrusion cooperates with the sliding groove.

[0010] As an optional implementation, two sets of sliding protrusions and two sets of sliding grooves are provided, and the two sets of sliding protrusions and sliding grooves are arranged symmetrically about the annular boss.

[0011] As an optional implementation, the sliding protrusion has a trapezoidal structure, and the sliding groove has a trapezoidal groove.

[0012] As an optional implementation, the sliding protrusion is a wedge-shaped structure, and the sliding groove is a wedge-shaped groove.

[0013] As an optional implementation, a gap is provided between the sliding protrusion and the sliding groove.

[0014] As an optional implementation, the sliding directions of the first sliding structure and the second sliding structure are perpendicular to each other.

[0015] As an optional implementation, the width of the support ring is greater than the width of the slip ring.

[0016] As an optional implementation, the height of the annular boss is lower than the end face height of the bearing body, and the height of the annular boss is consistent with the height of the initial contact point.

[0017] A compressor includes a crankshaft and a rotary compressor bearing as described above, wherein the thrust face of the crankshaft thrust section abuts against the end faces of the bearing ring and the bearing body.

[0018] The beneficial effects of this invention are as follows: The rotary compressor bearing and compressor provided by this invention include a bearing body and a bearing ring. An annular groove is provided on the end face of the bearing body, and an annular boss is formed between the annular groove and the bearing hole of the bearing body. The annular groove increases the flexibility of the contact portion between the bearing body and the crankshaft, thereby reducing the contact stress at the roots of the crankshaft's long and short shafts and reducing wear. The bearing ring is disposed on the annular boss, and the top surface of the bearing ring is flush with the end face of the bearing body. By providing the bearing ring on the annular boss, the bearing ring can support the crankshaft, increasing the bearing area between the bearing end face and the crankshaft thrust surface, and improving the bearing's performance. The end face enhances the load-bearing capacity of the crankshaft, maintaining the stability of crankshaft operation. Simultaneously, the top surface of the annular boss is lower than the end face of the bearing body, which solves the problems of excessive contact stress and stress concentration between the crankshaft root and the bearing inner wall, preventing abnormal wear at the crankshaft root. Furthermore, a first sliding structure is provided between the load-bearing ring and the annular boss. This first sliding structure ensures relative displacement between the load-bearing ring and the annular boss. When the crankshaft deforms under gas load, the flexible load-bearing ring and the annular boss further reduce the contact stress between the crankshaft root and the bearing inner wall, preventing stress concentration at the initial contact point and reducing abnormal crankshaft wear. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the force application of the prior art of this invention (I);

[0021] Figure 2 This is a schematic diagram of the force application of the prior art of this invention (II);

[0022] Figure 3 This is a schematic diagram of the compressor part of the present invention;

[0023] Figure 4 This is a partial structural diagram of the present invention (A).

[0024] Figure 5 This is a partial structural schematic diagram of the compressor bearing of the present invention;

[0025] Figure 6 This is a schematic diagram of the slip ring structure of the present invention;

[0026] Figure 7 This is a schematic diagram (I) of the support ring structure of the present invention;

[0027] Figure 8 This is a schematic diagram (II) of the support ring structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the forces acting on the compressor bearing of the present invention.

[0029] In the picture:

[0030] 100. Crankshaft;

[0031] 200. Rotary compressor bearing;

[0032] 110. Thrust surface;

[0033] 210. Bearing body;

[0034] 220. Support ring;

[0035] 230. Slip ring;

[0036] 240. Sliding groove;

[0037] 250. Sliding protrusion;

[0038] 260. Bearing ring;

[0039] 211. Annular groove;

[0040] 212. Bearing bore;

[0041] 213. Annular boss. Detailed Implementation

[0042] Please refer to the attached diagram below. Figures 1-9This document explains the content of the invention and the differences between the invention and existing technologies. The technical solutions (including preferred solutions) of the invention are further described in detail below with reference to accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of the invention, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by the invention can be replaced, or any two or more technical means or features provided by the invention can be combined to obtain new technical solutions. No technical feature or solution in this embodiment limits the scope of protection of the invention. The scope of protection of the invention should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by the invention.

[0043] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] This invention provides a rotary compressor bearing and compressor that increases the bearing area between the bearing end face and the crankshaft thrust surface, improves the bearing end face's load-bearing capacity on the crankshaft, and maintains the stability of the crankshaft's operation.

[0046] The following is combined Figures 1-9 The technical solution provided by this invention will be described in more detail below.

[0047] The present invention provides a rotary compressor bearing 200, including a bearing body 210 and a bearing ring 260. An annular groove 211 is provided on the end face of the bearing body 210, and an annular boss 213 is formed between the annular groove 211 and the bearing hole 212 of the bearing body 210.

[0048] The bearing ring 260 is disposed on the annular boss 213. The top surface of the bearing ring 260 away from the annular boss 213 is flush with the end face of the bearing body 210. A first sliding structure is provided between the bearing ring 260 and the annular boss 213.

[0049] The rotary compressor bearing 200 provided by the present invention includes a bearing body 210 and a bearing ring 260. An annular groove 211 is provided on the end face of the bearing body 210. An annular boss 213 is formed between the annular groove 211 and the bearing hole 212 of the bearing body 210. By providing the annular groove 211, the flexibility of the contact part between the bearing body 210 and the crankshaft 100 is increased, thereby reducing the contact stress at the root of the long and short shafts of the crankshaft 100 and reducing the occurrence of wear.

[0050] Secondly, the bearing ring 260 is disposed on the annular boss 213, and the top surface of the bearing ring 260 is flush with the end face of the bearing body 210. By disposing of the bearing ring 260 on the annular boss 213, the bearing ring 260 can support the crankshaft 100, increase the bearing area between the bearing end face and the thrust surface 110 of the crankshaft 100, improve the bearing capacity of the bearing end face of the crankshaft 100, and maintain the stability of the crankshaft 100 operation. At the same time, the top surface of the annular boss 213 is lower than the end face of the bearing body 210, which can solve the problem of excessive contact stress and stress concentration between the root of the crankshaft 100 and the inner wall of the bearing, and avoid abnormal wear at the root of the crankshaft 100.

[0051] In addition, a first sliding structure is provided between the bearing ring 260 and the annular boss 213. The first sliding structure can ensure that there is a relative displacement between the bearing ring 260 and the annular boss 213, thereby ensuring that a flexible structure is also formed between the bearing ring 260 and the annular boss 213. When the crankshaft 100 is deformed under the action of gas load, the flexible bearing ring 260 and the annular boss 213 can further reduce the contact stress between the root of the crankshaft 100 and the inner wall of the bearing, avoid stress concentration at the initial contact point between the crankshaft 100 and the inner wall of the bearing, and reduce the occurrence of abnormal wear of the crankshaft 100.

[0052] In some embodiments of the present invention, the height of the annular boss 213 is lower than the end face height of the bearing body 210, and the height of the annular boss 213 is consistent with the height of the initial contact point.

[0053] In some embodiments of the present invention described above, the height of the annular boss 213 is consistent with the height of the initial contact point, which increases the flexibility of the inner wall of the bearing and subjectes the inner wall of the bearing to continuous contact load, thereby reducing the contact stress at this point. However, considering that this structure greatly reduces the contact area between the bearing end face and the thrust surface 110 of the crankshaft 100, which is not conducive to the stable operation of the crankshaft 100, the above problem can be well solved by setting a bearing ring 260 on the annular boss 213. At the same time, it ensures sufficient support area of ​​the thrust surface 110 while reducing the contact stress at the initial contact point, which is beneficial to the stable operation of the crankshaft 100.

[0054] In some embodiments of the present invention, the bearing ring 260 includes a support ring 220 and a slip ring 230, the first sliding structure is disposed between the slip ring 230 and the annular boss 213, and a second sliding structure is disposed between the slip ring 230 and the support ring 220.

[0055] In some embodiments of the present invention described above, the bearing ring 260 includes a support ring 220 and a slip ring 230. A second sliding structure is provided between the slip ring 230 and the support ring 220. The second sliding structure enables the slip ring 230 and the support ring 220 to form a sliding fit, thereby ensuring that the slip ring 230 and the support ring 220 can move relative to each other. Combined with the relative movement between the slip ring 230 and the annular boss 213, the flexibility of the bearing ring 260 can be increased, thereby further reducing the contact stress at the root of the crankshaft 100 and reducing the occurrence of wear.

[0056] In some embodiments of the present invention, both the first sliding structure and the second sliding structure include a sliding protrusion 250 and a sliding groove 240, wherein the sliding protrusion 250 cooperates with the sliding groove 240.

[0057] In some embodiments of the present invention described above, the sliding protrusion 250 and the sliding groove 240 cooperate to achieve relative movement between the bearing ring 260 and the annular boss 213, thereby ensuring that when the crankshaft 100 is deformed under the action of gas load, the flexible bearing ring 260 can further reduce the contact stress between the root of the crankshaft 100 and the inner wall of the bearing, avoid stress concentration at the initial contact point between the crankshaft 100 and the inner wall of the bearing, and reduce the occurrence of abnormal wear of the crankshaft 100.

[0058] Specifically, the support ring 220 has a sliding protrusion 250 at its bottom, and the slip ring 230 has a sliding groove 240 at its top. The sliding protrusion 250 and the sliding groove 240 cooperate with each other, allowing the support ring 220 and the slip ring 230 to slide relative to each other. The slip ring 230 has a sliding protrusion 250 at its bottom, and the annular boss 213 has a sliding groove 240 at its top. The sliding protrusion 250 and the sliding groove 240 cooperate with each other, allowing the slip ring 230 to slide on the annular boss 213.

[0059] Alternatively, the support ring 220 may have a sliding groove 240 at its bottom and the slip ring 230 may have a sliding protrusion 250 at its top. The sliding protrusion 250 and the sliding groove 240 may cooperate with each other, allowing the support ring 220 and the slip ring 230 to slide relative to each other.

[0060] In some embodiments of the present invention, two sets of sliding protrusions 250 and sliding grooves 240 are provided respectively, and the two sets of sliding protrusions 250 and sliding grooves 240 are centrally symmetrical about the annular boss 213.

[0061] In some embodiments of the present invention described above, both the first sliding structure and the second sliding structure include two sets of sliding protrusions 250 and sliding grooves 240. The two sets of sliding protrusions 250 and sliding grooves 240 are centrally symmetrically arranged with respect to the annular boss 213. The cooperation of the two sets of sliding protrusions 250 and the two sets of sliding grooves 240 ensures that there is displacement in the extension direction of the sliding grooves 240 between the support ring 220 and the slip ring 230, and between the slip ring 230 and the annular boss 213. When the crankshaft 100 deforms under the action of gas load, it can drive the support ring 220 and the slip ring 230 to move along the extension direction of the sliding grooves 240, thereby reducing the contact stress between the root of the crankshaft 100 and the inner wall of the bearing, avoiding stress concentration at the initial contact point between the crankshaft 100 and the inner wall of the bearing, and reducing the occurrence of abnormal wear of the crankshaft 100.

[0062] In some embodiments of the present invention, the sliding protrusion 250 is a wedge-shaped structure, and the sliding groove 240 is a wedge-shaped groove.

[0063] In some embodiments of the present invention described above, the sliding protrusion 250 is a wedge-shaped structure, and the sliding groove 240 is a wedge-shaped groove. The sliding groove 240 and the sliding protrusion 250 cooperate, and the sliding groove 240 can limit the movement of the sliding protrusion 250, thereby limiting the slip ring 230 and the support ring 220 and reducing the occurrence of abnormal wear.

[0064] In some embodiments of the present invention, the sliding protrusion 250 is a trapezoidal structure and the sliding groove 240 is a trapezoidal groove.

[0065] In some embodiments of the present invention, the sliding protrusion 250 is a T-shaped structure and the sliding groove 240 is a T-shaped groove.

[0066] In some embodiments of the present invention, a gap is provided between the sliding protrusion 250 and the sliding groove 240.

[0067] In some embodiments of the present invention described above, a gap is provided between the sliding groove 240 and the sliding protrusion 250, which can ensure that the sliding protrusion 250 has more degrees of freedom within the sliding groove 240. The slip ring 230 and the annular boss 213 can move along the radially arranged sliding groove 240 and also have a certain amount of displacement in the circumferential direction, further improving the flexible contact between the crankshaft 100 and the bearing ring 260, and playing a better role in reducing the contact stress between the crankshaft 100 and the inner wall of the bearing, thereby reducing the occurrence of abnormal wear.

[0068] In some embodiments of the present invention, the sliding directions of the first sliding structure and the second sliding structure are perpendicular to each other.

[0069] In some embodiments of the present invention described above, the sliding directions of the first sliding structure and the second sliding structure are perpendicular to each other, so that the support ring 220 and the slip ring 230 can move in the front-back direction, and the slip ring 230 can slide on the annular boss 213 in the left-right direction, thereby ensuring better reduction of the contact stress between the crankshaft 100 and the inner wall of the bearing, and reducing the occurrence of abnormal wear.

[0070] It is understood that when a gap is provided between the sliding groove 240 and the sliding protrusion 250, the combination of the support ring 220 and the slip ring 230 can increase the flexibility of the inner wall of the bearing body 210, reduce the contact stress between the crankshaft 100 and the inner wall of the bearing, and reduce the occurrence of abnormal wear.

[0071] In some embodiments of the present invention, the ring width of the support ring 220 is greater than the ring width of the slip ring 230.

[0072] In some of the embodiments of the present invention described above, the ring width of the support ring 220 is greater than the ring width of the slip ring 230. The support ring 220 can better support the crankshaft 100, increase the bearing area between the bearing end face and the thrust surface 110 of the crankshaft 100, improve the bearing capacity of the bearing end face of the crankshaft 100, and maintain the stability of the crankshaft 100 operation.

[0073] The present invention also provides a compressor, including a crankshaft 100 and a rotary compressor bearing 200 as described above, wherein the thrust surface 110 of the thrust section of the crankshaft 100 abuts against the end faces of the bearing ring 260 and the bearing body 210.

[0074] Example 1:

[0075] The compressor provided by the present invention includes a crankshaft 100 and a rotary compressor bearing 200. The compressor bearing includes a bearing body 210 and a bearing ring 260. An annular groove 211 is provided on the end face of the bearing body 210. An annular boss 213 is formed between the annular groove 211 and the bearing hole 212 of the bearing body 210. The height of the annular boss 213 is lower than the height of the end face of the bearing body 210.

[0076] The bearing ring 260 includes a support ring 220 and a slip ring 230. A first sliding structure is provided between the slip ring 230 and the annular boss 213, which allows the slip ring 230 to be slidably disposed on the annular boss 213. A second sliding structure is provided between the support ring 220 and the slip ring 230, which allows the support ring 220 to be slidably disposed on the slip ring 230.

[0077] Furthermore, both the first sliding structure and the second sliding structure include a sliding protrusion 250 and a sliding groove 240, wherein the sliding protrusion 250 cooperates with the sliding groove 240.

[0078] Specifically, the top of the annular boss 213 is provided with two wedge-shaped sliding grooves 240, which are centrally symmetrically arranged on the annular boss 213. The bottom of the slip ring 230 is provided with two wedge-shaped sliding protrusions 250, which cooperate with the wedge-shaped sliding grooves 240 to enable the slip ring 230 to slide along the wedge-shaped sliding grooves 240.

[0079] The support ring 220 has two wedge-shaped sliding grooves 240 at its bottom, and the sliding ring 230 has two wedge-shaped sliding protrusions 250 at its top. The two wedge-shaped sliding grooves 240 are centrally symmetrically arranged on the support ring 220. The sliding protrusions 250 cooperate with the wedge-shaped sliding grooves 240 to allow the support ring 220 to slide along the sliding protrusions 250.

[0080] More specifically, the side with the larger opening of the wedge-shaped sliding groove 240 is positioned towards the center of the bearing body 210.

[0081] Preferably, the wedge-shaped groove on the support ring 220 is perpendicular to the wedge-shaped sliding groove 240 on the annular boss 213.

[0082] Furthermore, a gap is provided between the sliding protrusion 250 and the wedge-shaped sliding groove 240, so that the sliding protrusion 250 also has a circumferential range of motion within the wedge-shaped sliding groove 240, increasing the flexibility of the bearing ring 260, reducing the contact stress between the crankshaft 100 and the inner wall of the bearing, and reducing abnormal wear.

[0083] like Figure 9 As shown, the rotary compressor bearing 200 used in the compressor provided by the present invention can ensure sufficient thrust surface 110 support area while reducing the contact stress at the initial contact point.

[0084] Example 2:

[0085] The difference between this embodiment 2 and embodiment 1 is that the sliding groove 240 is a trapezoidal groove, and the sliding protrusion 250 is a trapezoidal structure.

[0086] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A rotary compressor bearing, characterized in that, It includes a bearing body and a bearing ring. An annular groove is provided on the end face of the bearing body, and an annular boss is formed between the annular groove and the bearing hole of the bearing body. The bearing ring is disposed on the annular boss, and the top surface of the bearing ring away from the annular boss is flush with the end face of the bearing body. A first sliding structure is provided between the bearing ring and the annular boss. The bearing ring includes a support ring and a slip ring. The first sliding structure is disposed between the slip ring and the annular boss, and a second sliding structure is disposed between the slip ring and the support ring.

2. The rotary compressor bearing according to claim 1, characterized in that, Both the first sliding structure and the second sliding structure include a sliding protrusion and a sliding groove, wherein the sliding protrusion cooperates with the sliding groove.

3. The rotary compressor bearing according to claim 2, characterized in that, The sliding protrusion and the sliding groove are provided in two sets, and the two sets of sliding protrusion and sliding groove are arranged symmetrically about the annular boss.

4. The rotary compressor bearing according to claim 2, characterized in that, The sliding protrusion has a trapezoidal structure, and the sliding groove has a trapezoidal groove. And / or, the sliding protrusion is a wedge-shaped structure, and the sliding groove is a wedge-shaped groove; And / or, the sliding protrusion is a T-shaped structure, and the sliding groove is a T-shaped groove.

5. The rotary compressor bearing according to claim 3, characterized in that, A gap is provided between the sliding protrusion and the sliding groove.

6. The rotary compressor bearing according to claim 1, characterized in that, The sliding directions of the first sliding structure and the second sliding structure are perpendicular to each other.

7. The rotary compressor bearing according to claim 1, characterized in that, The width of the support ring is greater than the width of the slip ring.

8. The rotary compressor bearing according to claim 1, characterized in that, The height of the annular boss is lower than the height of the end face of the bearing body, and the height of the annular boss is the same as the height of the initial contact point.

9. A compressor, characterized in that, It includes a crankshaft and a rotary compressor bearing as described in any one of claims 1-8, wherein the thrust surface of the crankshaft abuts against the end faces of the bearing ring and the bearing body.

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