Compressor crankshaft and rotor compressor

Abstract

The utility model provides a compressor crankshaft and a rotor compressor, the compressor crankshaft comprises: a rotating shaft, which is provided with a shaft hole, and the shaft hole extends along the axial direction of the rotating shaft; the eccentric part is arranged on the rotating shaft, and the eccentric part is eccentrically arranged relative to the rotating shaft; the first oil groove is formed in the outer circumferential surface of the eccentric part, and the first oil groove extends in the axial direction of the rotating shaft; the communicating hole communicates the shaft hole with the first oil groove; the first oil groove comprises a first groove face, the included angle beta between at least part of the surface of the first groove face and a first preset plane is smaller than or equal to 90 degrees, and the first preset plane is a plane defined by the central axis of the rotating shaft and the central axis of the eccentric part. The first oil groove further comprises a second groove face, the second groove face is adjacent to the first groove face, the first groove face and the second groove face are sequentially arranged in the circumferential direction of the compressor crankshaft, and the communicating hole extends to the second groove face. The compressor crankshaft solves the technical problem that a compressor in the prior art is poor in lubricating effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the compressor design field, specifically, a kind of compressor crankshaft and rotor compressor. BACKGROUND

[0002] In order to accelerate crankshaft oil circuit circulation guarantee lubrication effect, oil hole and oil groove are arranged in eccentric part of crankshaft, in the process of high-speed operation of compressor, lubricating oil is absorbed from the shaft center hole of crankshaft, and oil is supplied to pump body part through eccentric part oil hole, so as to improve the wear and seal state of pump body parts, avoid higher friction loss in rotating process, and also avoid the heat generated by friction to heat lubricating oil, which causes the increase of heat transfer loss of lubricating oil in cylinder.

[0003] The compressor in the related art has the problem of poor lubrication effect when operating, which leads to larger friction and heat generation of the compressor, and reduces the overall efficiency.

[0004] It can be seen that the related art has the technical problem of poor lubrication effect of the compressor, and currently no effective solution has been proposed for this technical problem. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of compressor crankshaft and rotor compressor, to solve the technical problem of poor lubrication effect of the compressor in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a compressor crankshaft is provided, comprising: a rotating shaft, a shaft hole is provided on the rotating shaft, and the shaft hole is arranged along the axial direction of the rotating shaft; an eccentric part, the eccentric part is arranged on the rotating shaft, and the eccentric part is arranged eccentrically with respect to the rotating shaft; a first oil groove, the first oil groove is arranged on the outer circumferential surface of the eccentric part, and the first oil groove is arranged along the axial direction of the rotating shaft; a communication hole, the communication hole communicates the shaft hole and the first oil groove; wherein the first oil groove includes a first groove surface, the included angle β between at least part of the surface of the first groove surface and a first preset plane is less than or equal to 90°, and the first preset plane is a plane defined by the central axis of the rotating shaft and the central axis of the eccentric part; the first oil groove further includes a second groove surface, the second groove surface is adjacent to the first groove surface, the first groove surface and the second groove surface are sequentially arranged along the circumferential direction of the compressor crankshaft, and the communication hole extends to the second groove surface.

[0007] Further, the included angle θ between at least part of the surface of the second groove surface and a second preset plane is less than or equal to 90°, and the second preset plane is a plane passing through the central axis of the communication hole and parallel to the central axis of the rotating shaft.

[0008] Further, the included angle between any part of the surface of the first groove surface and the first preset plane is less than or equal to 90°; the included angle between any part of the surface of the second groove surface and the second preset plane is less than or equal to 90°.

[0009] Further, the first groove surface is a plane or an arc surface, and the second groove surface is a plane or an arc surface.

[0010] Further, an included angle between the tangent plane of the first groove surface and the first preset plane is 90°, and an included angle between the tangent plane of the second groove surface and the second preset plane is 90°; wherein, in the case that the first groove surface is a plane, the tangent plane of the first groove surface coincides with the first groove surface; in the case that the first groove surface is an arc surface, the tangent plane of the first groove surface is a plane passing through the intersection line of the first groove surface and the second groove surface; in the case that the second groove surface is a plane, the tangent plane of the second groove surface coincides with the second groove surface; in the case that the second groove surface is an arc surface, the tangent plane of the second groove surface is a plane passing through the intersection line of the first groove surface and the second groove surface.

[0011] Further, the first oil groove is arranged on a non-pressure bearing surface of the compressor crankshaft during operation.

[0012] Further, the compressor crankshaft further comprises: a second oil groove, the second oil groove is arranged on the outer circumferential surface of the eccentric part, the second oil groove is in communication with the first oil groove, and the second oil groove is arranged in extension along the circumferential direction of the eccentric part.

[0013] Further, the second oil groove is arranged on a non-pressure bearing surface of the compressor crankshaft during operation, and extends to both ends of the eccentric part along the axial direction of the compressor crankshaft.

[0014] Further, a projection of the first oil groove and / or the second oil groove in a preset projection plane is within a target angle range, the preset projection plane is perpendicular to the central axis of the rotating shaft, the target angle range is an obtuse angle, the target angle range has a first boundary and a second boundary, an included angle between the first boundary and a first ray is not more than 30°, an included angle between the second boundary and a second ray is not more than 45°, an end point of the first ray is a center of the projection of the eccentric part in the preset projection plane, the first ray passes through the center of the projection of the rotating shaft in the preset projection plane, and the second ray is perpendicular to the first ray.

[0015] According to another aspect of the utility model, a kind of rotor compressor is provided, and rotor compressor includes above-mentioned compressor crankshaft.

[0016] The compressor crankshaft of the embodiment of the utility model comprises: a rotating shaft, the rotating shaft is provided with a shaft hole, the shaft hole is arranged along the axial direction of the rotating shaft; an eccentric part, the eccentric part is arranged on the rotating shaft, the eccentric part is arranged eccentrically relative to the rotating shaft; a first oil groove, the first oil groove is arranged on the outer circumferential surface of the eccentric part, the first oil groove is arranged along the axial direction of the rotating shaft; a communication hole, the communication hole is communicated with the shaft hole and the first oil groove; wherein, the first oil groove comprises a first groove surface, the included angle β between at least part of the surface of the first groove surface and a first preset plane is less than or equal to 90 degrees, the first preset plane is a plane defined by the central axis of the rotating shaft and the central axis of the eccentric part; the first oil groove further comprises a second groove surface, the second groove surface is adjacent to the first groove surface, the first groove surface and the second groove surface are sequentially arranged along the circumferential direction of the compressor crankshaft, and the communication hole extends to the second groove surface. The compressor crankshaft with the structural design is used, the structure of the first oil groove is designed, the first groove surface satisfies that the included angle β between at least part of the surface and the first preset plane is less than or equal to 90 degrees, and the first preset plane is a plane defined by the central axis of the rotating shaft and the central axis of the eccentric part. When the compressor crankshaft rotates, the lubricating oil (refrigerator oil) at the bottom of the compressor can sequentially pass through the shaft hole on the rotating shaft, the communication hole and enter the first oil groove, then wedge-shaped oil films are formed between the eccentric part and the cylinder under the blocking effect of the first groove surface, the second groove surface is designed, and the communication hole extends to the second groove surface, when the lubricating oil flows out from the communication hole, wedge-shaped oil films can be formed at the second groove surface. If the communication hole extends to the first groove surface, the direction of the lubricating oil when flowing out is too backward, and belongs to the side deviating from the rotating direction of the crankshaft, the risk of the lubricating oil being thrown out is increased, and the formation of wedge-shaped lubricating oil films is not conducive. With the rotation of the compressor crankshaft, the wedge-shaped oil films can exist continuously, thereby improving the lubricating effect of the compressor, avoiding the situation that the flat oil film is broken during the operation of the compressor in the related art, and solving the technical problem that the lubricating effect of the compressor is poor in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0018] Figure 1 It is a structure schematic view of the embodiment of the compressor crankshaft of the utility model under the first visual angle;

[0019] Figure 2 It is a structure schematic view of the embodiment of the compressor crankshaft of the utility model under the second visual angle;

[0020] Figure 3 It is a structure schematic view of the compressor crankshaft in the Figure 2 along the B-B line;

[0021] Figure 4A cross-sectional structure schematic view of a first embodiment of the compressor crankshaft of the utility model;

[0022] Figure 5 A cross-sectional structure schematic view of a second embodiment of the compressor crankshaft of the utility model;

[0023] Figure 6 A cross-sectional structure schematic view of a third embodiment of the compressor crankshaft of the utility model;

[0024] Figure 7 A target angle range schematic view where the first oil groove and / or the second oil groove are located.

[0025] Wherein, the above-mentioned drawings include the following reference signs:

[0026] 1, rotating shaft; 10, shaft hole; 2, eccentric part; 3, first oil groove; 31, first groove surface; 32, second groove surface; 4, communication hole; 5, second oil groove. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] Please refer to Figures 1 to 7 , in order to realize the above-mentioned purpose, the embodiment of the utility model provides a kind of compressor crankshaft, the compressor crankshaft includes: rotating shaft 1, rotating shaft 1 is equipped with shaft hole 10, shaft hole 10 is along the axial extension of rotating shaft 1 Setting;Eccentric part 2, eccentric part 2 is set to rotating shaft 1, eccentric part 2 is eccentrically arranged relative to rotating shaft 1;First oil groove 3, first oil groove 3 is wedge-shaped groove, first oil groove 3 is set to the outer circumferential surface of eccentric part 2, first oil groove 3 is along the axial extension of rotating shaft 1 Setting;Communication hole 4, communication hole 4 is communicated with shaft hole 10 and first oil groove 3;Wherein, first oil groove 3 includes first groove surface 31, the included angle β between at least part of surface of first groove surface 31 and first preset plane is ≤90 °, first preset plane is the plane defined by the central axis of rotating shaft 1 and the central axis of eccentric part 2;First oil groove 3 also includes second groove surface 32, second groove surface 32 is adjacent to first groove surface 31, first groove surface 31 and second groove surface 32 are sequentially arranged along the circumference of compressor crankshaft, and communication hole 4 extends to second groove surface 32.

[0029] The compressor crankshaft with this structural design, through the design of the first oil groove 3, ensures that the angle β between at least a portion of its surface and a first preset plane is ≤90°, where the first preset plane is the plane defined by the central axis of the rotating shaft 1 and the central axis of the eccentric portion 2. When the compressor crankshaft rotates, the lubricating oil (refrigeration oil) at the bottom of the compressor enters the first oil groove 3 sequentially through the shaft hole 10 and the connecting hole 4 on the rotating shaft 1. Then, under the obstruction of the first groove surface 31, a wedge-shaped oil film is formed between the eccentric portion 2 and the cylinder. By designing the second groove surface 32 and extending the connecting hole 4 to the second groove surface 32, a wedge-shaped oil film can be formed at the second groove surface 32 when the lubricating oil flows out from the connecting hole 4. If the connecting hole 4 extends to the first groove surface 31, the direction of lubricating oil flow is too far back and is opposite to the direction of crankshaft rotation, which increases the risk of lubricating oil being thrown out and is not conducive to the formation of a wedge-shaped lubricating oil film. As the compressor crankshaft rotates, the wedge-shaped oil film persists, thereby improving the compressor's lubrication effect and preventing the flat oil film from rupturing during compressor operation, which leads to poor lubrication, thus solving the technical problem of poor compressor lubrication in related technologies.

[0030] In actual implementation, if the angle β between the first groove surface 31 and the first preset plane is too large (greater than 90°), the first groove surface 31 will approach a plane, significantly reducing its blocking effect on the lubricating oil. This is not conducive to the storage of lubricating oil in the first oil groove 3, and thus is detrimental to the formation of the wedge-shaped oil film. Specifically, the connecting hole 4 extends to the second groove surface 32, and the connecting hole 4 is spaced apart from the first groove surface 31, thereby preventing the lubricating oil from flowing out too far back and reducing the risk of the lubricating oil being thrown out.

[0031] like Figures 3 to 6 When the crankshaft of the compression molding machine is running, it rotates counterclockwise.

[0032] exist Figures 1 to 6 In the embodiment shown, the number of eccentric parts 2 of the compressor and crankshaft is one; of course, the number of eccentric parts 2 can also be multiple.

[0033] In a preferred embodiment, in order to promote the formation of a wedge-shaped lubricating oil film to a greater extent, the area of ​​the second groove surface 32 is designed to be larger than the area of ​​the first groove surface 31, and the projection surface of the connecting hole 4 falls entirely on the second groove surface 32.

[0034] The angle θ between at least a portion of the surface of the second groove surface 32 and the second preset plane is ≤90°. The second preset plane is a plane passing through the central axis of the connecting hole 4 and parallel to the central axis of the rotating shaft 1. By further designing the structure of the second groove surface 32, the angle θ between at least a portion of the surface of the second groove surface 32 and the second preset plane is made ≤90°, avoiding the situation where the wedge-shaped oil film is difficult to form due to an excessively large angle θ. Specifically, if the angle θ is too large, it will cause the second groove surface 32 to form an excessively large angle with the rotation direction of the compressor crankshaft, which is not conducive to the lubricating oil entering the first oil groove 3, thus hindering the formation of the wedge-shaped oil film.

[0035] In a preferred embodiment, the angle between any part of the surface of the first groove surface 31 and the first preset plane is less than or equal to 90°; the angle between any part of the surface of the second groove surface 32 and the second preset plane is less than or equal to 90°.

[0036] In specific implementation, the first groove surface 31 is a plane or an arc surface, and the second groove surface 32 is a plane or an arc surface.

[0037] In a preferred embodiment, to create better conditions for the formation and maintenance of the wedge-shaped oil film, the angle between the cross-section of the first groove surface 31 and the first preset plane is 90°, and the angle between the cross-section of the second groove surface 32 and the second preset plane is 90°; wherein, when the first groove surface 31 is a plane, the cross-section of the first groove surface 31 coincides with the first groove surface 31; when the first groove surface 31 is an arc-shaped surface, the cross-section of the first groove surface 31 is a surface passing through the boundary line between the first groove surface 31 and the second groove surface 32; when the second groove surface 32 is a plane, the cross-section of the second groove surface 32 coincides with the second groove surface 32; when the second groove surface 32 is an arc-shaped surface, the cross-section of the second groove surface 32 is a surface passing through the boundary line between the first groove surface 31 and the second groove surface 32.

[0038] Specifically, the first oil groove 3 is located on the non-pressure-bearing surface of the compressor crankshaft during operation. The non-pressure-bearing surface is the surface on the compressor crankshaft opposite to the pressure-bearing surface. By setting the first oil groove 3 on the non-pressure-bearing surface, the lubrication system of the crankshaft is optimized, thereby improving the lubrication effect, reducing wear, and extending the service life of the crankshaft.

[0039] like Figure 6 As shown, in this embodiment, the compressor crankshaft further includes a second oil groove 5, which is disposed on the outer peripheral surface of the eccentric portion 2. The second oil groove 5 communicates with the first oil groove 3 and extends circumferentially along the eccentric portion 2. By designing the second oil groove 5, more lubricating oil can be collected into the first oil groove 3, thereby facilitating the formation of a wedge-shaped lubricating oil film and improving the crankshaft lubrication effect.

[0040] Specifically, the second oil groove 5 is arranged on the non-pressure surface of the compressor crankshaft during operation, and extends to both ends of the eccentric part 2 along the axial direction of the compressor crankshaft.

[0041] Specifically, the projection of the first oil groove 3 and / or the second oil groove 5 in the preset projection plane is within a target angle range, the preset projection plane is perpendicular to the central axis of the rotating shaft 1, the target angle range is an obtuse angle, the target angle range has a first boundary and a second boundary, the included angle between the first boundary and a first ray is not more than 30°, the included angle between the second boundary and a second ray is not more than 45°, the first ray has an end point that is the center of the projection of the eccentric part 2 in the preset projection plane, and the first ray passes through the center of the projection of the rotating shaft 1 in the preset projection plane, and the second ray is perpendicular to the first ray.

[0042] Figure 7 A schematic view of the target angle range in which the first oil groove 3 and / or the second oil groove 5 is located is shown in FIG. 3. Figure 7 In the embodiment shown in the figure, the above-mentioned target angle range is γ, γ is an obtuse angle, the included angle between the first boundary of γ and the first ray is 30°, and the included angle between the second boundary of γ and the second ray is 45°. When the first oil groove 3 and the second oil groove 5 are located in the target angle range, the wedge-shaped oil film described above can be more effectively formed during rotation of the compressor crankshaft, thereby improving the lubrication effect, reducing wear, prolonging the service life of the crankshaft, and solving the technical problem of poor lubrication effect of the compressor in the related art.

[0043] In addition, the embodiment of the utility model further provides a rotary compressor, which comprises the above-mentioned compressor crankshaft.

[0044] From the above description, it can be seen that the above-mentioned embodiment of the utility model realizes the following technical effects:

[0045] The compressor crankshaft of the embodiment of the utility model discloses the following: a rotating shaft 1, the rotating shaft 1 is equipped with shaft hole 10, shaft hole 10 is along the axial extension of rotating shaft 1 Setting;Eccentric part 2, eccentric part 2 is arranged on rotating shaft 1, eccentric part 2 is eccentric to rotating shaft 1 Setting;First oil groove 3, first oil groove 3 is arranged on the outer circumferential surface of eccentric part 2, first oil groove 3 is along the axial extension of rotating shaft 1 Setting;Communication hole 4, communication hole 4 is communicated with shaft hole 10 and first oil groove 3;Wherein, first oil groove 3 includes first groove surface 31, the included angle β between the surface of first groove surface 31 and first preset plane is ≤ 90 °, and the first preset plane is the plane defined by the central axis of rotating shaft 1 and the central axis of eccentric part 2;First oil groove 3 also includes second groove surface 32, second groove surface 32 is adjacent to first groove surface 31, first groove surface 31 and second groove surface 32 are sequentially arranged along the circumference of compressor crankshaft, and communication hole 4 extends to second groove surface 32.The compressor crankshaft with the structure design, by the structure of first oil groove 3 is designed, makes its first groove surface 31 satisfy the included angle β between the surface of first groove surface 31 and first preset plane is ≤ 90 °, and the first preset plane is the plane defined by the central axis of rotating shaft 1 and the central axis of eccentric part 2.When the compressor crankshaft rotates, the lubricating oil (refrigerator oil) in the bottom of compressor will sequentially pass through shaft hole 10 on rotating shaft 1, communication hole 4 enters first oil groove 3, then under the blocking action of first groove surface 31, wedge-shaped oil film is formed between eccentric part 2 and cylinder.Through the design of second groove surface 32, and make communication hole 4 extend to second groove surface 32, when the lubricating oil flows out from communication hole 4, wedge-shaped oil film can be formed at second groove surface 32.If communication hole 4 extends to first groove surface 31, then the direction of lubricating oil flow is too far back, and it is the side away from the rotation direction of crankshaft, which will increase the risk of lubricating oil being thrown out, and is not conducive to the formation of wedge-shaped lubricating oil film.With the rotation of compressor crankshaft, the wedge-shaped oil film will exist continuously, thereby improving the lubrication effect of compressor, avoiding the rupture of the plane oil film during the operation of the compressor in the related art, and solving the technical problem of poor lubrication effect of the compressor in the related art.

[0046] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the exemplary embodiments described herein can assume different alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific devices illustrated in the attached drawings, and described in the following specification are exemplary embodiments only and do not limit the scope of the application.

[0047] It is also important to note that the term "or" as used herein is intended to mean any possible combination of the enumerated items inter alia. For example, the phrase "A or B" is intended to mean: "A; or B; or A and B." As used herein, the term "includes" and / or "including", when used in this specification, mean "including, but not limited to." As used herein, the term "coupled" means the joining of two members directly or indirectly. As used herein, the term "truncated" means that the length of the member is less than the length of the original member.

[0048] It is to be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. Preferably, the terms "comprise", "comprises" and / or "comprising", as used herein, are intended to be synonymous with the term "include" and / or "including", as used herein, such that the terms "comprise", "comprises" and / or "comprising" and / or the term "include" and / or "including" are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.

[0049] The preferred embodiments of the present application have been described herein above with the understanding that the application is susceptible to myriad changes, modifications, and adaptations by those of ordinary skill in the art. Accordingly, the scope of the present application is not intended to be limited to the particular embodiments described hereinabove but extends to encompass all changes, modifications, and adaptations within the scope and spirit of the present application.

Claims

1. A compressor crankshaft characterized by, The utility model relates to a compressor crankshaft, which comprises: a rotating shaft (1) provided with a shaft hole (10) extending along the axial direction of the rotating shaft (1); an eccentric part (2) provided on the rotating shaft (1) and arranged eccentrically relative to the rotating shaft (1); a first oil groove (3) provided on the outer circumferential surface of the eccentric part (2) and extending along the axial direction of the rotating shaft (1); a communication hole (4) connecting the shaft hole (10) and the first oil groove (3); wherein the first oil groove (3) comprises a first groove surface (31), the included angle (β) between at least part of the surface of the first groove surface (31) and a first preset plane is less than or equal to 90°, the first preset plane is a plane defined by the central axis of the rotating shaft (1) and the central axis of the eccentric part (2); the first oil groove (3) further comprises a second groove surface (32) adjacent to the first groove surface (31), the first groove surface (31) and the second groove surface (32) are sequentially arranged along the circumferential direction of the compressor crankshaft, and the communication hole (4) extends to the second groove surface (32).

2. The compressor crankshaft of claim 1, wherein The included angle (θ) between at least part of the surface of the second groove surface (32) and a second preset plane is less than or equal to 90°, the second preset plane is a plane passing through the central axis of the communication hole (4) and parallel to the central axis of the rotating shaft (1).

3. The compressor crankshaft of claim 2, wherein, The included angle between any part of the surface of the first groove surface (31) and the first preset plane is less than or equal to 90°; the included angle between any part of the surface of the second groove surface (32) and the second preset plane is less than or equal to 90°.

4. The compressor crankshaft of claim 2, wherein, The first groove surface (31) is a plane or an arc surface, and the second groove surface (32) is a plane or an arc surface.

5. The compressor crankshaft of claim 4, wherein, The included angle between the tangent plane of the first groove surface (31) and the first preset plane is 90°, and the included angle between the tangent plane of the second groove surface (32) and the second preset plane is 90°. In the case that the first groove surface (31) is a plane, the tangent plane of the first groove surface (31) coincides with the first groove surface (31); in the case that the first groove surface (31) is an arc surface, the tangent plane of the first groove surface (31) is a plane passing through the intersection line of the first groove surface (31) and the second groove surface (32); in the case that the second groove surface (32) is a plane, the tangent plane of the second groove surface (32) coincides with the second groove surface (32); in the case that the second groove surface (32) is an arc surface, the tangent plane of the second groove surface (32) is a plane passing through the intersection line of the first groove surface (31) and the second groove surface (32).

6. The compressor crankshaft of any one of claims 1 to 5, wherein, The first oil groove (3) is arranged on a non-pressure-bearing surface of the compressor crankshaft during operation.

7. The compressor crankshaft of any one of claims 1 to 5, wherein, The compressor crankshaft further comprises: a second oil groove (5) provided on the outer circumferential surface of the eccentric part (2), the second oil groove (5) is connected with the first oil groove (3), and the second oil groove (5) extends along the circumferential direction of the eccentric part (2).

8. The compressor crankshaft of claim 7, wherein, The second oil groove (5) is arranged on a non-pressure surface of the compressor crankshaft during operation, and extends to both ends of the eccentric part (2) along the axial direction of the compressor crankshaft.

9. The compressor crankshaft of claim 7 wherein, The projection of the first oil groove (3) and / or the second oil groove (5) in a preset projection plane is within a target angle range, the preset projection plane is perpendicular to the central axis of the rotating shaft (1), the target angle range is an obtuse angle, the target angle range has a first boundary and a second boundary, the included angle between the first boundary and a first ray is not more than 30°, the included angle between the second boundary and a second ray is not more than 45°, the end point of the first ray is the center of the projection of the eccentric part (2) in the preset projection plane, the first ray passes through the center of the projection of the rotating shaft (1) in the preset projection plane, and the second ray is perpendicular to the first ray.

10. A rotary compressor characterized by comprising: The rotary compressor comprises the compressor crankshaft according to any one of claims 1 to 9.

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