Compressor crankshaft, compressor pump body, compressor and refrigeration device

Abstract

This disclosure relates to a compressor crankshaft, a compressor pump body, a compressor, and a refrigeration device. The compressor crankshaft has an oil inlet extending axially therefrom. The compressor crankshaft includes an eccentric portion and a short shaft distributed axially therefrom. The short shaft has a first radial oil hole communicating with the oil inlet. The outer surface of the eccentric portion has a lubricating oil groove extending axially along the compressor crankshaft, and the lubricating oil groove communicates with the first radial oil hole. The compressor crankshaft of this disclosure, by having a lubricating oil groove extending axially along the compressor crankshaft on the outer surface of the eccentric portion, and the lubricating oil groove communicating with the first radial oil hole, allows lubricating oil flowing out through the first radial oil hole to enter the lubricating oil groove of the eccentric portion, thereby achieving lubrication of the outer surface of the eccentric portion and improving the lubrication effect of the compressor crankshaft.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, specifically to a compressor crankshaft, a compressor pump body, a compressor, and a refrigeration device. Background Technology

[0002] Rotary compressors compress refrigerant vapor through the rotation of a piston, offering advantages such as high compression efficiency, fewer parts, small size, light weight, good balance, low noise, and low power consumption. However, in related technologies, the crankshaft of rotary compressors suffers from insufficient lubrication, leading to crankshaft wear and lower compressor efficiency. For example, at high speeds, inadequate lubrication of the eccentric portion of the crankshaft causes wear and further reduces compressor efficiency. Therefore, there is an urgent need to provide a compressor crankshaft that improves lubrication. Summary of the Invention

[0003] This disclosure proposes a compression crankshaft to improve the lubrication effect of a compressor crankshaft.

[0004] The compressor crankshaft disclosed herein has an oil inlet extending along its axial direction. The compressor crankshaft includes an eccentric portion and a short shaft distributed along its axial direction. The short shaft has a first radial oil hole communicating with the oil inlet. The outer side of the eccentric portion has a lubricating oil groove extending along the axial direction of the compressor crankshaft. The lubricating oil groove communicates with the first radial oil hole.

[0005] Optionally, the eccentric portion is provided with an oil guide groove, and the lubricating oil groove is connected to the first radial oil hole through the oil guide groove.

[0006] Optionally, along the axial direction of the compressor crankshaft, the lubricating oil groove passes through the eccentric portion, the oil guide groove is provided at one end of the eccentric portion facing the short shaft, along the circumferential direction of the compressor crankshaft, and one end of the oil guide groove extends to the lubricating oil groove.

[0007] Optionally, the eccentric portion has a recess at one end facing the short shaft, and the other end of the oil guide groove extends to the recess.

[0008] Optionally, the connection between the end of the eccentric portion facing the short shaft and the outer side surface is provided with a chamfer, and the chamfer forms the oil guide groove; or, the connection between the end of the eccentric portion facing the short shaft and the outer side surface is provided with a rounded corner, and the rounded corner forms the oil guide groove.

[0009] Optionally, the length of the chamfer is 0.3mm to 0.8mm.

[0010] Optionally, a second radial oil hole is provided in the middle of the eccentric portion, and the second radial oil hole connects the oil inlet and the lubricating oil groove.

[0011] Optionally, the diameter of the second radial oil hole is 2.5 mm to 3.0 mm.

[0012] Optionally, the lubricating oil groove is a spiral oil groove.

[0013] Optionally, the helix angle of the lubricating oil groove is 10° to 30°.

[0014] Optionally, the width of the lubricating oil groove is 2.5mm to 3.2mm; and / or, the depth of the lubricating oil groove is 1.2mm to 1.6mm.

[0015] Optionally, the outer surface includes a load-bearing area and a non-load-bearing area, and at least a portion of the lubricating oil groove is located in the non-load-bearing area.

[0016] This disclosure also proposes a compressor pump body.

[0017] The compressor pump body disclosed herein includes a compressor crankshaft, a piston, and a secondary bearing, wherein the compressor crankshaft is any of the compressor crankshafts described above; the piston is sleeved on the outside of the eccentric portion, and the secondary bearing is sleeved on the outside of the short shaft.

[0018] This disclosure also proposes a compressor.

[0019] The compressor disclosed herein includes a compressor pump body and a motor, wherein the compressor pump body is any of the compressor pump bodies described above, and the motor is connected to the compressor crankshaft.

[0020] This disclosure further proposes a refrigeration device.

[0021] The refrigeration equipment disclosed herein includes the compressor described in any of the foregoing claims.

[0022] When the compressor crankshaft of this disclosure is working, lubricating oil enters the compressor crankshaft through the oil inlet hole, and then some of the lubricating oil can flow out through the first radial oil hole. By providing a lubricating oil groove extending axially along the compressor crankshaft on the outer side of the eccentric part, and the lubricating oil groove communicating with the first radial oil hole, the lubricating oil flowing out through the first radial oil hole can enter the lubricating oil groove of the eccentric part, thereby achieving lubrication of the outer side of the eccentric part and improving the lubrication effect of the compressor crankshaft. Attached Figure Description

[0023] Figure 1 This is a perspective view of the compressor crankshaft from one viewpoint of an embodiment of the present disclosure.

[0024] Figure 2 This is a perspective view of the compressor crankshaft according to an embodiment of the present disclosure.

[0025] Figure 3 yes Figure 2Enlarged view of point A in the middle.

[0026] Figure 4 This is a bottom view of the compressor crankshaft according to an embodiment of the present disclosure.

[0027] Figure 5 yes Figure 4 BB view.

[0028] Figure 6 This is a perspective view of the compressor pump body according to an embodiment of the present disclosure.

[0029] Figure 7 This is an exploded view of the compressor pump body according to an embodiment of this disclosure.

[0030] Figure 8 This is a sectional view of the front view of the compressor pump body according to an embodiment of this disclosure.

[0031] Figure 9 This is a top view of the compressor pump body according to an embodiment of this disclosure.

[0032] Figure 10 yes Figure 9 The CC view.

[0033] Figure label:

[0034] 100. Compressor pump body;

[0035] 10. Compressor crankshaft; 101. Oil inlet;

[0036] 1. Eccentric portion; 11. Lubricating oil groove; 12. First thrust surface; 13. Oil guide groove; 14. Outer surface; 141. Load-bearing area; 142. Non-load-bearing area; 15. Recess; 16. Second radial oil hole; 17. Second thrust surface;

[0037] 2. Short shaft; 21. First radial oil hole;

[0038] 3. Long shaft; 31. Third radial oil hole; 32. Fourth radial oil hole;

[0039] 20. Piston;

[0040] 30. Secondary bearing;

[0041] 40. Main bearing;

[0042] 50. Cylinder; 501. Vane groove;

[0043] 60. Slider;

[0044] 70. Exhaust valve plate. Detailed Implementation

[0045] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0046] like Figures 1 to 5 As shown, the compressor crankshaft 10 of this embodiment has an oil inlet 101 extending along its axial direction. The compressor crankshaft 10 includes an eccentric portion 1 and a short shaft 2 distributed along its axial direction. The short shaft 2 has a first radial oil hole 21 communicating with the oil inlet 101. The outer surface 14 of the eccentric portion 1 has a lubricating oil groove 11 extending along the axial direction of the compressor crankshaft 10. The lubricating oil groove 11 communicates with the first radial oil hole 21.

[0047] When the compressor crankshaft 10 of this embodiment is working, lubricating oil enters the compressor crankshaft 10 through the oil inlet 101, and then some of the lubricating oil can flow out through the first radial oil hole 21. By providing a lubricating oil groove 11 extending axially along the compressor crankshaft 10 on the outer surface 14 of the eccentric portion 1, and the lubricating oil groove 11 communicating with the first radial oil hole 21, the lubricating oil flowing out through the first radial oil hole 21 can enter the lubricating oil groove 11 of the eccentric portion 1, thereby achieving lubrication of the outer surface 14 of the eccentric portion 1 and improving the lubrication effect of the compressor crankshaft 10.

[0048] like Figures 6 to 10 As shown, when the compressor crankshaft 10 is in use, the piston 20 is sleeved on the outside of the eccentric part 1, and the auxiliary bearing 30 is sleeved on the outside of the short shaft 2. When the auxiliary bearing 30 is sleeved on the outside of the short shaft 2, the first radial oil hole 21 is provided at one end of the short shaft 2 near the eccentric part 1.

[0049] Thus, a portion of the lubricating oil flowing out of the first radial oil hole 21 enters the lubricating oil groove 11 of the eccentric part 1, and another portion of the lubricating oil flowing out of the first radial oil hole 21 can enter between the eccentric part 1 and the secondary bearing 30, thereby achieving lubrication between the eccentric part 1 and the secondary bearing 30.

[0050] In some embodiments, such as Figure 2 and Figure 3 As shown, the eccentric part 1 is provided with an oil guide groove 13, and the lubricating oil groove 11 and the first radial oil hole 21 are connected through the oil guide groove 13.

[0051] By providing an oil guide groove 13 in the eccentric part 1, the connection between the lubricating oil groove 11 and the first radial oil hole 21 can be easily achieved. Furthermore, the connection between the lubricating oil groove 11 and the first radial oil hole 21 via the oil guide groove 13 allows the position of the lubricating oil groove 11 to be unrestricted by the first radial oil hole 21. That is, the positions of the lubricating oil groove 11 and the first radial oil hole 21 can be set according to design requirements first, and then the connection between the lubricating oil groove 11 and the first radial oil hole 21 can be achieved through the oil guide groove 13, making the position of the lubricating oil groove 11 more flexible.

[0052] Optionally, such as Figure 2 and Figure 3 As shown, along the axial direction of the compressor crankshaft 10, the lubricating oil groove 11 passes through the eccentric portion 1. Therefore, the end of the lubricating oil groove 11 near the short shaft 2 passes through the eccentric portion 1, and the oil guide groove 13 is provided at the end of the eccentric portion 1 facing the short shaft 2. The oil guide groove 13 extends circumferentially along the compressor crankshaft 10, and one end of the oil guide groove 13 extends to the lubricating oil groove 11.

[0053] For example, such as Figure 3 and Figure 5 As shown, the end face of the eccentric portion 1 facing the short shaft 2 forms a first thrust surface 12, and one end of the lubricating oil groove 11 passes through the first thrust surface 12. Figure 1 , Figure 2 and Figure 5 As shown, the compressor crankshaft 10 also includes a long shaft 3, which is located on the side of the eccentric portion 1 away from the short shaft 2. The end face of the eccentric portion 1 facing the long shaft 3 forms a second thrust surface 17, and the other end of the lubricating oil groove 11 passes through the second thrust surface 17. The lubricating oil flowing out of the first radial oil hole 21 flows radially along the compressor crankshaft 10 and enters the oil guide groove 13. Then, the lubricating oil in the oil guide groove 13 flows circumferentially along the compressor crankshaft 10 and enters the lubricating oil groove 11. When the compressor crankshaft 10 is working, the compressor crankshaft 10 rotates, and the lubricating oil in the first radial oil hole 21 flows radially along the compressor crankshaft 10 under the action of centrifugal force.

[0054] By having the lubricating oil groove 11 pass through the eccentric portion 1 along the axial direction of the compressor crankshaft 10, and one end of the oil guide groove 13 extend to the lubricating oil groove 11, on the one hand, it is convenient to realize the connection between the first radial oil hole 21 and the lubricating oil groove 11 through the oil guide groove 13; on the other hand, the oil guide groove 13 is manufactured at the end of the eccentric portion 1 near the short shaft 2, which facilitates the manufacturing of the oil guide groove 13, thereby facilitating the manufacturing of the compressor crankshaft 10.

[0055] Furthermore, this allows the lubricating oil in the lubricating oil groove 11 to enter the end of the eccentric portion 1 near the long shaft 3, thereby achieving lubrication of the eccentric portion 1 near the long shaft 3. For example, it achieves lubrication of the second thrust surface 17.

[0056] To make the technical solution of this disclosure easier to understand, the following description further illustrates the technical solution of this disclosure, taking the alignment of the axial direction of the compressor crankshaft 10 with the vertical direction as an example. Wherein, the vertical direction is as follows... Figures 1 to 3 , Figure 5 As shown.

[0057] For example, the oil inlet 101 extends vertically, the eccentric portion 1 is located on the upper side of the short shaft 2, and the long shaft 3 is located on the upper side of the eccentric portion 1. The lubricating oil groove 11 extends vertically, and the lower end of the lubricating oil groove 11 penetrates the lower end face of the eccentric portion 1, while the upper end of the lubricating oil groove 11 penetrates the upper end face of the eccentric portion 1. The oil guide groove 13 is located at the lower end of the eccentric portion 1. The lower end face of the eccentric portion 1 forms a first thrust surface 12, and the upper end face of the eccentric portion 1 forms a second thrust surface 17.

[0058] Optionally, such as Figure 2 and Figure 3 As shown, the eccentric part 1 has a recessed part 15 at one end facing the short shaft 2, and the other end of the oil guide groove 13 extends to the recessed part 15.

[0059] By extending the other end of the oil guide groove 13 to the recess 15, both ends of the oil guide groove 13 extend to the recess 15 and the lubricating oil groove 11, respectively. Therefore, when machining the oil guide groove 13, both ends can be directly machined to the recess 15 and the lubricating oil groove 11, further facilitating the manufacturing of the oil guide groove 13, and consequently further facilitating the manufacturing of the compressor crankshaft 10.

[0060] Optionally, such as Figure 3 As shown, at least a portion of the oil guide groove 13 is disposed in the circumferential direction of the compressor crankshaft 10 between the lubricating oil groove 11 and the first radial oil hole 21.

[0061] Specifically, by having at least a portion of the oil guide groove 13 disposed circumferentially between the lubricating oil groove 11 and the first radial oil hole 21 on the compressor crankshaft 10, it can be understood that the entire oil guide groove 13 is disposed circumferentially between the lubricating oil groove 11 and the first radial oil hole 21 on the compressor crankshaft 10; or, a portion of the oil guide groove 13 is disposed circumferentially between the lubricating oil groove 11 and the first radial oil hole 21 on the compressor crankshaft 10, and another portion of the oil guide groove 13 is not disposed circumferentially between the lubricating oil groove 11 and the first radial oil hole 21 on the compressor crankshaft 10.

[0062] For example, such as Figure 3 As shown, in the circumferential direction of the compressor crankshaft 10, a first radial oil hole 21 is disposed between the lubricating oil groove 11 and the recess 15, a part of the oil guide groove 13 is disposed between the recess 15 and the first radial oil hole 21, and another part of the oil guide groove 13 is disposed between the lubricating oil groove 11 and the first radial oil hole 21.

[0063] By positioning at least a portion of the oil guide groove 13 circumferentially between the lubricating oil groove 11 and the first radial oil hole 21, the lubricating oil flowing out of the first radial oil hole 21, under centrifugal force, flows radially along the compressor crankshaft 10 to the outer surface 14 of the eccentric portion 1, where it enters the oil guide groove 13. This effectively shortens the path between the first radial oil hole 21 and the oil guide groove 13, facilitating communication between them and further improving the lubrication effect of the compressor crankshaft 10.

[0064] In some embodiments, the long shaft 3 is provided with a third radial oil hole 31 and a fourth radial oil hole 32 communicating with the oil inlet 101. The third radial oil hole 31 and the fourth radial oil hole 32 are arranged at intervals along the axial direction of the compressor crankshaft 10. The third radial oil hole 31 is disposed close to the eccentric portion 1, and the fourth radial oil hole 32 is disposed away from the eccentric portion 1.

[0065] For example, such as Figure 2 As shown, the third radial oil hole 31 is located below the fourth radial oil hole 32.

[0066] like Figure 8 As shown, when the compressor crankshaft 10 is working, the main bearing 40 is sleeved on the outside of the long shaft 3. The lubricating oil in the oil inlet 101 can flow out through the third radial oil hole 31 and the fourth radial oil hole 32. The lubricating oil flowing out of the third radial oil hole 31 enters between the main bearing 40 and the eccentric part 1, thereby lubricating the part of the eccentric part 1 away from the short shaft 2. The lubricating oil flowing out of the fourth radial oil hole 32 enters the side of the main bearing 40 away from the eccentric part 1, thereby lubricating the part of the main bearing 40 away from the eccentric part 1.

[0067] Understandably, when the compressor crankshaft 10 is working, the end of the short shaft 2 furthest from the eccentric portion is immersed in lubricating oil. When the compressor crankshaft 10 rotates, the lubricating oil flows along the oil inlet 101 toward the long shaft 3. When the lubricating oil in the oil inlet 101 flows through the first radial oil hole 21, the third radial oil hole 31, and the fourth radial oil hole 32, some of the lubricating oil will flow out through these holes. When the speed of the compressor crankshaft 10 is low, the centrifugal force on the lubricating oil in the oil inlet 101 is small, and more lubricating oil flows out of the first radial oil hole 21, while less lubricating oil flows out of the third radial oil hole 31 and the fourth radial oil hole 32. The lubricating oil flowing out of the third radial oil hole 31 alone is insufficient to effectively lubricate the eccentric portion 1 near the long shaft 3, that is, it is insufficient to effectively lubricate the second thrust surface 17.

[0068] By extending one end of the lubricating oil groove 11 through the eccentric part 1 along the axial direction of the compressor crankshaft 10, the lubricating oil in the lubricating oil groove 11 can reach the end of the eccentric part 1 near the long shaft 3 when the speed of the compressor crankshaft 10 is low, thereby achieving effective lubrication of the eccentric part 1 near the long shaft 3 and further improving the lubrication effect of the compressor crankshaft 10.

[0069] Optionally, such as Figures 1 to 3 , Figure 5 As shown, the middle part of the eccentric part 1 is provided with a second radial oil hole 16, which connects the oil inlet hole 101 and the lubricating oil groove 11.

[0070] By setting the second radial oil hole 16, the lubricating oil in the oil inlet 101 can flow into the lubricating oil groove 11 along the second radial oil hole 16 when it flows through the second radial oil hole 16, thereby improving the lubrication effect on the eccentric part 1 and further improving the lubrication effect of the compressor crankshaft 10.

[0071] When the crankshaft 10 of the compressor rotates at a high speed, the lubricating oil in the oil inlet 101 experiences sufficient centrifugal force. The lubricating oil at the second radial oil hole 16 mainly flows along the lubricating oil groove 11 to the end of the eccentric part 1 near the long shaft 3, achieving effective lubrication of the eccentric part 1 near the long shaft 3. Part of the lubricating oil at the first radial oil hole 21 enters the lubricating oil groove 11 through the oil guide groove 13, achieving effective lubrication of the outer surface 14 of the eccentric part 1.

[0072] Optionally, the diameter of the second radial oil hole 16 is 2.5 mm to 3.0 mm.

[0073] It is understandable that the larger the diameter of the second radial oil hole 16, the lower the strength of the eccentric part 1, and the more lubricating oil flows out of the second radial oil hole 16. The lubricating oil in the oil inlet 101 is difficult to reach the third radial oil hole 31 and the fourth radial oil hole 32, resulting in insufficient lubrication at the long shaft 3. The smaller the diameter of the second radial oil hole 16, the less lubricating oil flows out of the second radial oil hole 16, resulting in less lubricating oil in the lubricating oil groove 11, resulting in insufficient lubrication at the eccentric part 1.

[0074] By setting the diameter of the second radial oil hole 16 to 2.5mm to 3.0mm, the lubrication effect at the long shaft 3 and the eccentric part 1 can be taken into account, which is beneficial to improving the overall lubrication effect of the compressor crankshaft 10.

[0075] In some embodiments, such as Figures 1 to 3 As shown, the lubricating oil groove 11 is a spiral oil groove.

[0076] By setting the lubricating oil groove 11 as a spiral oil groove, the lubricating oil in the lubricating oil groove 11 can have an upward force when the compressor crankshaft 10 is working, thereby increasing the oil supply height of the lubricating oil in the lubricating oil groove 11 and further improving the lubrication effect of the compressor crankshaft 10.

[0077] Optionally, the helix angle of the lubricating oil groove 11 is 10° to 30°.

[0078] It is understandable that the larger the helix angle of the lubricating oil groove 11, the greater the upward force on the lubricating oil in the lubricating oil groove 11. More of the lubricating oil in the lubricating oil groove 11 reaches the side of the eccentric part 1 near the long axis 3, and less reaches the outer side 14 of the eccentric part 1, which easily leads to insufficient lubrication at the outer side 14 of the eccentric part 1. Conversely, the smaller the helix angle of the lubricating oil groove 11, the smaller the upward force on the lubricating oil in the lubricating oil groove 11. More of the lubricating oil in the lubricating oil groove 11 reaches the outer side 14 of the eccentric part 1, and less reaches the side of the eccentric part 1 near the long axis 3, which easily leads to insufficient lubrication at the side of the eccentric part 1 near the long axis 3.

[0079] By setting the helix angle of the lubricating oil groove 11 to 10° to 30°, the lubrication effect of the outer side 14 of the eccentric part 1 and the lubrication effect of the side of the eccentric part 1 near the long shaft 3 can be taken into account, which is beneficial to improving the overall lubrication effect of the compressor crankshaft 10.

[0080] Optionally, the width of the lubricating oil groove 11 is 2.5mm to 3.2mm.

[0081] It is understandable that the wider the lubricating oil groove 11, the lower the flow rate of the lubricating oil in the lubricating oil groove 11, and the less lubricating oil in the lubricating oil groove 11 reaches the side of the eccentric part 1 near the long axis 3, which can easily lead to insufficient lubrication on the side of the eccentric part 1 near the long axis 3; the narrower the width of the lubricating oil groove 11, the higher the flow rate of the lubricating oil in the lubricating oil groove 11, and the less lubricating oil in the lubricating oil groove 11 is located on the outer side 14 of the eccentric part 1, which can easily lead to insufficient lubrication on the outer side 14 of the eccentric part 1.

[0082] By setting the width of the lubricating oil groove 11 to 2.5mm to 3.2mm, it is beneficial to improve the overall lubrication effect of the compressor crankshaft 10.

[0083] Optionally, the depth of the lubricating oil groove 11 is 1.2 mm to 1.6 mm.

[0084] It is understandable that the greater the depth of the lubricating oil groove 11, the lower the flow rate of the lubricating oil in the lubricating oil groove 11, and the less lubricating oil in the lubricating oil groove 11 reaches the side of the eccentric part 1 near the long axis 3, which can easily lead to insufficient lubrication on the side of the eccentric part 1 near the long axis 3; the smaller the depth of the lubricating oil groove 11, the higher the flow rate of the lubricating oil in the lubricating oil groove 11, and the less lubricating oil in the lubricating oil groove 11 is located on the outer side 14 of the eccentric part 1, which can easily lead to insufficient lubrication on the outer side 14 of the eccentric part 1.

[0085] By setting the depth of the lubricating oil groove 11 to 1.2mm to 1.6mm, it is beneficial to improve the overall lubrication effect of the compressor crankshaft 10.

[0086] Optionally, such as Figure 3 and Figure 4 As shown, the outer surface 14 includes a load-bearing area 141 and a non-load-bearing area 142, and at least a portion of the lubricating oil groove 11 is located in the non-load-bearing area 142.

[0087] Wherein, at least a portion of the lubricating oil groove 11 is located in the non-load-bearing area 142, which can be understood as: the entire lubricating oil groove 11 is located in the non-load-bearing area 142; or, a portion of the lubricating oil groove 11 is located in the non-load-bearing area 142, and another portion of the lubricating oil groove 11 is located in the load-bearing area 141.

[0088] Among them, such as Figure 5 As shown, with the plane of symmetry of the compressor crankshaft 10 as the reference plane, the intersection of the reference plane and the outer surface 14 is the first dividing line a. The first dividing line a is rotated by a preset angle P around the axis of the compressor crankshaft 10 to form the second dividing line b. The portion of the outer surface 14 located between the first dividing line a and the second dividing line b is the non-load-bearing area 142, and the other portion of the outer surface 14 is the load-bearing area 141. The preset angle P can be 70°.

[0089] By placing at least a portion of the lubricating oil groove 11 in the non-load-bearing area 142, the impact of the lubricating oil groove 11 on the structural strength of the eccentric part 1 can be reduced, which is beneficial to improving the structural strength of the eccentric part 1 and improving the reliability of the compressor crankshaft 10.

[0090] Optionally, such as Figure 3 As shown, a chamfer is provided at the connection between the end of the eccentric part 1 facing the short shaft 2 and the outer side surface 14, and the chamfer forms an oil guide groove 13.

[0091] By setting a chamfer at the connection between the end of the eccentric part 1 facing the short shaft 2 and the outer side 14, an oil guide groove 13 is formed by using the chamfer, which further facilitates the processing and manufacturing of the oil guide groove 13, thereby further facilitating the processing and manufacturing of the compressor crankshaft 10.

[0092] Of course, in other embodiments, a rounded corner can also be provided at the connection between the end of the eccentric portion 1 facing the short axis 2 and the outer surface 14, forming an oil guide groove 13. In addition, in other embodiments, the longitudinal section of the oil guide groove 13 can also be rectangular or other shapes.

[0093] Optionally, such as Figure 3 As shown, the length of the chamfer is 0.3mm to 0.8mm. That is to say, the length of the right-angled side of the chamfer is 0.3mm to 0.8mm.

[0094] It is understandable that the larger the size of the oil guide groove 13, the more lubricating oil is in the oil guide groove 13, and the less lubricating oil is in the side of the eccentric part 1 near the short shaft 2, which can easily lead to insufficient lubrication in the side of the eccentric part 1 near the short shaft 2; the smaller the size of the oil guide groove 13, the less lubricating oil is in the oil guide groove 13, and the less lubricating oil is in the lubricating oil groove 11, which can easily lead to insufficient lubrication at the outer surface 14 of the eccentric part 1.

[0095] Setting the chamfer length to 0.3mm to 0.8mm helps improve the overall lubrication effect of the compressor crankshaft 10.

[0096] In this embodiment of the compressor crankshaft 10, a lubricating oil groove 11 is provided on the outer surface 14 of the eccentric portion 1. The lubricating oil groove 11 extends through both ends of the eccentric portion 1 along the axial direction of the compressor crankshaft 10, and the lubricating oil groove 11 is a spiral oil groove. This improves the hydrodynamic characteristics of the lubricating oil in the lubricating oil groove 11 and accelerates the flow rate of the lubricating oil in the lubricating oil groove 11. By providing an oil guide groove 13 on the side of the eccentric portion 1 near the short shaft 2, the oil guide groove 13 connects the first radial oil hole 21 and the lubricating oil groove 11, so that the oil guide groove 13 can guide a portion of the lubricating oil at the first radial oil hole 21 to the lubricating oil groove 11.

[0097] When the compressor crankshaft 10 operates at low speed, the centrifugal force of the lubricating oil in the oil inlet 101 is insufficient, the amount of lubricating oil in the first radial oil hole 21 is large, and the amount of lubricating oil in the second radial oil hole 16 and the third radial oil hole 31 is small. The oil guide groove 13 can guide part of the lubricating oil in the first radial oil hole 21 to the lubricating oil groove 11, and then flow to the first thrust surface 12 through the lubricating oil groove 11, so that the eccentric part 1 and the first thrust surface 12 are fully lubricated. When the compressor crankshaft 10 operates at high speed, the centrifugal force of the lubricating oil in the oil inlet 101 is sufficient. The lubricating oil at the second radial oil hole 16 mainly flows along the lubricating oil groove 11 to the first thrust surface 12, and part of the lubricating oil at the first radial oil hole 21 enters the lubricating oil groove 11 through the oil guide groove 13, which can effectively lubricate the eccentric part 1.

[0098] like Figures 6 to 10As shown, the compressor pump body 100 of this embodiment includes a compressor crankshaft 10, a piston 20 and a secondary bearing 30. The compressor crankshaft 10 is the compressor crankshaft 10 of any of the above embodiments. The piston 20 is sleeved on the outside of the eccentric part 1 and the secondary bearing 30 is sleeved on the outside of the short shaft 2.

[0099] Because the compressor crankshaft 10 of the present invention has a good lubrication effect, the compressor pump body 100 of the present invention has advantages such as good lubrication performance.

[0100] Optionally, such as Figures 6 to 10 As shown, the compressor pump body 100 also includes a main bearing 40, a cylinder 50, a sliding vane 60, and an exhaust valve 70. The main bearing 40 is sleeved on the outside of the long shaft 3, and the cylinder 50 is sleeved on the outside of the piston 20. The cylinder 50 has a sliding vane groove 501, and the sliding vane 60 is disposed within the sliding vane groove 501. The main bearing 40 has an exhaust port, and the exhaust valve 70 is correspondingly disposed to open or close the exhaust port. The main bearing 40, the auxiliary bearing 30, and the cylinder 50 can be connected by bolts and form a compressor cavity. The motor drives the compressor crankshaft 10 to rotate, and the eccentric part 1 drives the piston 20 to move, realizing the intake and exhaust of the compressor pump body 100.

[0101] The compressor pump body 100 also includes a cylinder 50, a sliding vane 60, and an exhaust valve 70. The cylinder 50 is sleeved on the outside of the piston 20, and the cylinder 50 has a sliding vane groove 501, within which the sliding vane 60 is disposed. The main bearing 40 has an exhaust port, and the exhaust valve 70 is correspondingly positioned to open or close the exhaust port. The main bearing 40, the auxiliary bearing 30, and the cylinder 50 can be bolted together to form the compressor cavity. The motor drives the compressor crankshaft 10 to rotate, and the eccentric part 1 drives the piston 20 to move, thus realizing the intake and exhaust of the compressor pump body 100.

[0102] The compressor of this embodiment includes a compressor pump body 100 and a motor. The compressor pump body 100 is the compressor pump body 100 of any of the above embodiments, and the motor is connected to the compressor crankshaft 10. The motor is used to drive the compressor crankshaft 10 to rotate.

[0103] Because the compressor pump body 100 of the present disclosure has advantages such as good lubrication effect, the compressor of the present disclosure has advantages such as good lubrication effect and high efficiency.

[0104] The refrigeration equipment disclosed herein includes the compressor described in any of the above embodiments. The refrigeration equipment may be an air conditioner, refrigerator, etc.

[0105] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0108] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0109] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0110] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the scope of protection of the present disclosure.

Claims

1. A compressor crankshaft, characterized in that, The compressor crankshaft is provided with an oil inlet hole extending along its axial direction. The compressor crankshaft includes an eccentric portion and a short shaft distributed along its axial direction. The short shaft is provided with a first radial oil hole communicating with the oil inlet hole. The outer side of the eccentric portion is provided with a lubricating oil groove extending along the axial direction of the compressor crankshaft. The lubricating oil groove is communicating with the first radial oil hole.

2. The compressor crankshaft according to claim 1, characterized in that, The eccentric portion is provided with an oil guide groove, and the lubricating oil groove is connected to the first radial oil hole through the oil guide groove.

3. The compressor crankshaft according to claim 2, characterized in that, Along the axial direction of the compressor crankshaft, the lubricating oil groove passes through the eccentric portion, and the oil guide groove is located at one end of the eccentric portion facing the short shaft, along the circumferential direction of the compressor crankshaft, and one end of the oil guide groove extends to the lubricating oil groove.

4. The compressor crankshaft according to claim 3, characterized in that, The eccentric portion has a recess at one end facing the short shaft, and the other end of the oil guide groove extends to the recess.

5. The compressor crankshaft according to claim 3, characterized in that, The connection between the eccentric portion and the end facing the short shaft and the outer side surface is chamfered, and the chamfer forms the oil guide groove; or The connection between the eccentric portion and the end facing the short shaft and the outer side surface is provided with a rounded corner, which forms the oil guide groove.

6. The compressor crankshaft according to claim 5, characterized in that, The length of the chamfer is 0.3mm to 0.8mm.

7. The compressor crankshaft according to claim 3, characterized in that, The eccentric portion is provided with a second radial oil hole in the middle, which connects the oil inlet and the lubricating oil groove.

8. The compressor crankshaft according to claim 7, characterized in that, The diameter of the second radial oil hole is 2.5 mm to 3.0 mm.

9. The compressor crankshaft according to any one of claims 1-8, characterized in that, The lubricating oil groove is a spiral oil groove.

10. The compressor crankshaft according to claim 9, characterized in that, The helix angle of the lubricating oil groove is 10° to 30°.

11. The compressor crankshaft according to claim 9, characterized in that, The width of the lubricating oil groove is 2.5mm to 3.2mm; and / or The depth of the lubricating oil groove is 1.2mm to 1.6mm.

12. The compressor crankshaft according to any one of claims 1-8, characterized in that, The outer surface includes a load-bearing area and a non-load-bearing area, and at least a portion of the lubricating oil groove is located in the non-load-bearing area.

13. A compressor pump body, characterized in that, include: A compressor crankshaft, wherein the compressor crankshaft is the compressor crankshaft according to any one of claims 1-12; A piston and a secondary bearing, wherein the piston is sleeved on the outside of the eccentric portion and the secondary bearing is sleeved on the outside of the short shaft.

14. A compressor, characterized in that, include: The compressor pump body is the compressor pump body according to claim 13; An electric motor is connected to the crankshaft of the compressor.

15. A refrigeration device, characterized in that, Includes the compressor as described in claim 14.

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