Eccentric shaft for high-power commercial scroll compressor

Abstract

The utility model discloses an eccentric shaft for a high-power commercial scroll compressor, which comprises a rotor part, an auxiliary shaft neck is arranged at the left end of the rotor part, a concentric hole is formed in the center of the auxiliary shaft neck, a main shaft neck is arranged at the right end of the rotor part, an eccentric shaft neck is eccentrically arranged on the right side end face of the main shaft neck, and the concentric hole is formed in the center of the eccentric shaft neck. The eccentric shaft neck is provided with a concentric hole, the end face of the eccentric shaft neck is provided with an eccentric deep oil hole which is eccentrically arranged, the eccentric deep oil hole is communicated with the concentric hole, the side wall of the eccentric shaft neck is provided with a driving surface, and the driving surface comprises a first driving inclined surface and a second driving inclined surface. And the first highest point of the first driving inclined plane is higher than the second highest point of the second driving inclined plane by a preset height. The driving surface of the eccentric shaft adopts a high-low fall inclined surface structure design, and the contact point of the driving surface and the compressor movable disc is close to the upper part, so that the overturning risk of the compressor movable disc is solved, the driving force and the stability are improved, and the eccentric shaft is suitable for a high-power commercial scroll compressor.

Description

Technical Field

[0001] The utility model relates to an eccentric shaft for a scroll compressor, more specifically, to an eccentric shaft for a high-power commercial scroll compressor. Background Art

[0002] A scroll compressor is a positive displacement compressor whose compression element consists of an orbiting scroll and a stationary scroll. The eccentric shaft is the key component connecting the orbiting and stationary scrolls. This allows the orbiting and stationary scrolls to revolve relative to each other, creating a continuous change in the enclosed volume and achieving the purpose of compressing the gas. Consequently, strict requirements are placed on the eccentric shaft's materials, design precision, mechanical lubrication, and cooling. As compressor power increases, the structural design of the eccentric shaft components must be adjusted to meet these requirements. In particular, the eccentric shaft's stability in contact with the compressor's rotating disk is less than ideal, posing a risk of the rotating disk tipping over. Utility Model Content

[0003] Based on this, it is necessary to provide an eccentric shaft for a high-power commercial scroll compressor to address the above technical problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An eccentric shaft for a high-power commercial scroll compressor is characterized in that the eccentric shaft for a high-power commercial scroll compressor includes a rotor part, a secondary shaft neck is provided at the left end of the rotor part, a concentric hole is provided in the center of the secondary shaft neck, a main shaft neck is provided at the right end of the rotor part, an eccentrically arranged eccentric shaft neck is provided on the right end face of the main shaft neck, an eccentrically arranged eccentric deep oil hole is provided on the end face of the eccentric shaft neck, the eccentric deep oil hole is communicated with the concentric hole, a driving surface is provided on the side wall of the eccentric shaft neck, and the driving surface includes a first driving inclined surface and a second driving inclined surface.

[0006] As a preferred embodiment of the present invention, a first oil hole and a second oil hole are provided on the side wall of the rotor portion, and both the first oil hole and the second oil hole are connected to the eccentric deep oil hole.

[0007] As a preferred embodiment of the present invention, the diameters of the first oil hole and the second oil hole are the same.

[0008] As a preferred embodiment of the present invention, the first highest point of the first driving inclined surface is higher than the second highest point of the second driving inclined surface by a preset height.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The utility model provides an eccentric shaft for a high-power commercial scroll compressor. Since the driving surface of the eccentric shaft adopts a high-low drop inclined surface structure design, the contact point between the driving surface and the compressor moving disk is close to the top, which solves the risk of overturning of the compressor moving disk, improves the driving force and stability, and is suitable for high-power commercial scroll compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the solutions in the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of the eccentric shaft for a high-power commercial scroll compressor of the present utility model;

[0013] Figure 2 for Figure 1 A cross-sectional view of the eccentric shaft along line AA for a high-power commercial scroll compressor;

[0014] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the eccentric shaft for a high-power commercial scroll compressor, from the Z-direction perspective;

[0015] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the eccentric shaft for a high-power commercial scroll compressor, from the X-axis perspective;

[0016] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the eccentric shaft for a high-power commercial scroll compressor, from the Y-axis perspective;

[0017] The markings in the figure are as follows: 1. Main journal; 2. Rotor part; 3. Auxiliary journal; 4. Eccentric journal; 5. Driving surface; 51. First driving inclined surface; 52. Second driving inclined surface; 6. Concentric hole; 7. Eccentric deep oil hole; 8. First oil hole; 9. Second oil hole; M, first highest point; N, second highest point; P, eccentric shaft for high-power commercial scroll compressor. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] like Figures 1 to 4As shown, the eccentric shaft P for the high-power commercial scroll compressor includes a rotor portion 2, a secondary journal 3 is provided at the left end of the rotor portion 2, a concentric hole 6 is provided at the center of the secondary journal 3, a main journal 1 is provided at the right end of the rotor portion 2, an eccentrically arranged eccentric journal 4 is provided on the right end face of the main journal 1, an eccentrically arranged eccentric deep oil hole 7 is provided on the end face of the eccentric journal 4, and the eccentric deep oil hole 7 is communicated with the concentric hole 6.

[0020] A first oil hole 8 and a second oil hole 9 are provided on the side wall of the rotor portion 2 . Both the first oil hole 8 and the second oil hole 9 are connected to the eccentric deep oil hole 7 .

[0021] It should be noted that the diameters of the first oil hole 8 and the second oil hole 9 are the same.

[0022] like Figure 5 As shown, a driving surface 5 is provided on the side wall of the eccentric journal 4, and the driving surface 5 includes a first driving inclined surface 51 and a second driving inclined surface 52. The first highest point M of the first driving inclined surface 51 is higher than the second highest point N of the second driving inclined surface 52 by a preset height.

[0023] It should be noted that, in order to clearly express the relative relationship between the first driving inclined surface 51 and the second driving inclined surface 52, Figure 5 The relative angle between the first driving inclined surface 51 and the second driving inclined surface 52 is exaggerated.

[0024] The structure of the eccentric shaft P for the high-power commercial scroll compressor will be further described below through specific embodiments.

[0025] For example, if the eccentric shaft length is designed to be greater than 480 mm and the eccentric distance of the eccentric journal 4 is designed to be 7.25 mm, the first highest point M of the first driving inclined surface 51 is 0.083 mm higher than the second highest point N of the second driving inclined surface 52. This can meet the compression ratio design requirement of a high-power scroll compressor of 25 HP or more, 17.5.

[0026] Since the driving surface of the eccentric shaft adopts a high-low drop inclined surface structure design, the contact point between the driving surface and the compressor rotor plate is close to the top, which solves the risk of overturning of the compressor rotor plate, improves the driving force and stability, and is suitable for high-power commercial scroll compressors.

[0027] Obviously, the embodiments described above are only part of the embodiments of the present application, rather than all the embodiments. The drawings provide preferred embodiments of the present application, but do not limit the patent scope of the present application.

Claims

1. An eccentric shaft for a high-power commercial scroll compressor, characterized in that: The eccentric shaft (P) for a high-power commercial scroll compressor includes a rotor part (2), a secondary journal (3) is provided at the left end of the rotor part (2), a concentric hole (6) is provided at the center of the secondary journal (3), a main journal (1) is provided at the right end of the rotor part (2), an eccentrically arranged eccentric journal (4) is provided on the right end face of the main journal (1), an eccentrically arranged eccentric deep oil hole (7) is provided on the end face of the eccentric journal (4), the eccentric deep oil hole (7) is connected to the concentric hole (6), a driving surface (5) is provided on the side wall of the eccentric journal (4), and the driving surface (5) includes a first driving inclined surface (51) and a second driving inclined surface (52).

2. The eccentric shaft for a high-power commercial scroll compressor according to claim 1, characterized in that: A first oil hole (8) and a second oil hole (9) are provided on the side wall of the rotor part (2), and both the first oil hole (8) and the second oil hole (9) are connected to the eccentric deep oil hole (7).

3. The eccentric shaft for a high-power commercial scroll compressor according to claim 2, characterized in that: The diameters of the first oil hole (8) and the second oil hole (9) are the same.

4. The eccentric shaft for a high-power commercial scroll compressor according to claim 1, characterized in that: The first highest point (M) of the first driving inclined surface (51) is higher than the second highest point (N) of the second driving inclined surface (52) by a preset height.

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