Crankshaft structure and compressor having the same

Abstract

This invention provides a crankshaft structure and a compressor having the same. The crankshaft structure includes a platform and cranks and a main shaft respectively disposed on both sides of the platform. An annular protrusion is provided on the platform, and the cranks are located inside the annular protrusion. A portion of the outer wall surface of the cranks, the inner wall surface of the annular protrusion, and the platform together form an oil groove. The main shaft has a main shaft oil passage that communicates with the oil groove. The technical solution of this application solves the problem of excessively high compressor power consumption caused by unreasonable crankshaft structure design in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor design technology, and more specifically, to a crankshaft structure and a compressor having the same. Background Technology

[0002] In existing technologies, crankshaft structures typically incorporate oil grooves inside the crank, which are connected to the outer wall of the crank via oil outlet channels that penetrate both the inside and outside of the crank. However, this design, due to the presence of oil grooves inside the crank structure, results in complex crankshaft manufacturing and poor manufacturability. Furthermore, this design compromises the integrity of the crank's outer wall, leading to frictional power consumption caused by the machining process. Additionally, the heat generated on the crank's outer wall during operation cannot be effectively transferred, thus increasing compressor power consumption.

[0003] There is currently no effective solution to the aforementioned problems in the existing technology. Summary of the Invention

[0004] The main objective of this invention is to provide a crankshaft structure and a compressor having the same, so as to solve the problem of excessive power consumption of compressors in the prior art due to unreasonable crankshaft structure settings.

[0005] To achieve the above objectives, according to one aspect of the present invention, a crankshaft structure is provided, the crankshaft structure including a platform and a crank and a main shaft respectively disposed on both sides of the platform, an annular protrusion is provided on the platform, the crank is located inside the annular protrusion, a portion of the outer wall surface of the crank, the inner wall surface of the annular protrusion and the platform together form an oil groove, and the main shaft has a main shaft oil passage inside, the main shaft oil passage communicating with the oil groove.

[0006] Furthermore, the crankshaft structure also includes a connecting rod, which has a shaft hole end that connects to the crank. The oil groove, the bottom of the shaft hole end, and the bottom of the crank together form an oil reservoir. There is a gap between the inner wall of the shaft hole end and the outer wall of the crank, and the oil reservoir communicates with the gap.

[0007] Furthermore, the spindle oil passage is spirally arranged on the surface of the spindle. A first oil hole is provided at the end of the spindle away from the platform, and a second oil hole is provided at the end of the spindle closer to the platform. The second oil hole is connected to the oil groove, and both the first oil hole and the second oil hole are connected to the spindle oil passage.

[0008] Furthermore, a connecting hole is provided at the bottom of the oil sump, which connects to the second oil hole so that the oil sump is connected to the spindle oil passage.

[0009] Furthermore, the central axis of the connecting hole and the central axis of the main shaft form a first plane, the central axis of the crank and the central axis of the main shaft form a second plane, the angle between the first plane and the second plane is A1, 63°≤A1≤68°, and / or, the angle between the central axis of the connecting hole and the central axis of the main shaft is A2, 34°≤A2≤38°.

[0010] Furthermore, the width of the oil groove is L1, and the diameter of the connecting hole is L2, wherein 0.53*L1≤L2≤0.55*L1.

[0011] Furthermore, the inner diameter of the shaft hole end is the same as the outer diameter of the crank, the outer diameter of the shaft hole end is the same as the inner diameter of the oil groove, and the inner side of the shaft hole end has a groove, the gap including the groove.

[0012] Furthermore, there is a first height difference H1 between the bottom plane of the oil tank and the main plane of the platform, where 0.5mm≤H1≤1mm, and a first height difference H2 between the top of the annular protrusion and the bottom plane of the oil tank, where 1mm≤H2≤1.5mm.

[0013] Furthermore, when the shaft end is connected to the crank, the oil in the main shaft oil passage can enter the oil reservoir through the connecting hole, and the oil in the oil reservoir can enter the gap along the first direction to perform lubrication on at least one of the crank and the shaft end.

[0014] According to another aspect of the present invention, a compressor is provided, including a crankshaft structure, wherein the crankshaft structure is the crankshaft structure described above.

[0015] By utilizing the technical solution of this invention, an oil groove is formed by part of the outer wall surface of the crank, the annular protruding inner wall surface, and the platform. This eliminates the traditional internal oil passage structure and through-type lubricating oil groove of the crank, maintaining the integrity of the outer wall surface of the crank and reducing frictional power consumption caused by the machining of the outer wall surface. Simultaneously, by connecting the main shaft oil passage to the oil groove and cooperating with the connecting rod, the upward path of the refrigerant oil is reduced. During operation, the refrigerant oil can rise directly from the oil groove to the outer wall surface of the crank, improving the crank's heat dissipation performance. While ensuring the crank's lubrication effect, this reduces the compressor's power consumption. By adopting the technical solution of this application, the friction of the moving pair composed of the crank and connecting rod is reduced, achieving effective heat dissipation of the crank's outer wall surface, thereby solving the problem of excessive compressor power consumption caused by unreasonable crankshaft structure design in the prior art. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1A schematic diagram of a first embodiment of the crankshaft structure according to the present invention is shown;

[0018] Figure 2 A schematic diagram of a second embodiment of the crankshaft structure according to the present invention is shown;

[0019] Figure 3 It shows Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 A schematic diagram of a third embodiment of the crankshaft structure according to the present invention is shown;

[0021] Figure 5 It shows Figure 4 A cross-sectional schematic diagram of AA in the diagram;

[0022] Figure 6 A schematic diagram of a fourth embodiment of the crankshaft structure according to the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Platform; 11. Annular protrusion; 12. Main body plane;

[0025] 20. Crank;

[0026] 30. Spindle; 31. Spindle oil passage; 32. First oil hole; 33. Second oil hole;

[0027] 40. Oil tank; 41. Oil storage cavity; 42. Gap; 43. Connecting hole;

[0028] 50. Connecting rod; 51. Shaft hole end; 511. Groove;

[0029] 60. Air passage; 61. Pin hole end; 62. Connecting rod; 63. Arc-shaped step; 65. Oil groove bottom surface; 66. Crank outer wall surface; 67. Oil groove outer wall surface. Detailed Implementation

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0034] Combination Figures 1 to 6 As shown, according to a specific embodiment of this application, a crankshaft structure is provided.

[0035] The crankshaft structure includes a platform 10 and cranks 20 and a main shaft 30 respectively disposed on both sides of the platform 10. An annular protrusion 11 is provided on the platform 10. The cranks 20 are located inside the annular protrusion 11. A portion of the outer wall surface of the cranks 20, the inner wall surface of the annular protrusion 11, and the platform 10 together form an oil groove 40. The main shaft 30 has a main shaft oil passage 31 inside, which communicates with the oil groove 40.

[0036] By applying the technical solution of this invention, an oil groove 40 is formed by utilizing part of the outer wall surface of the crank 20, the inner wall surface of the annular protrusion 11, and the platform 10. This eliminates the traditional internal oil passage structure and through-type lubricating oil groove of the crank, maintaining the integrity of the outer wall surface of the crank and reducing frictional power consumption caused by the machining of the outer wall surface. Simultaneously, the main shaft oil passage 31 is connected to the oil groove 40, and through cooperation with the connecting rod, the upward path of the refrigerant oil is reduced. During operation, the refrigerant oil can rise directly from the oil groove to the outer wall surface of the crank, improving the heat dissipation performance of the crank. While ensuring the lubrication effect of the crank, the power consumption of the compressor is reduced. By adopting the technical solution of this application, the friction of the moving pair composed of the crank and connecting rod is reduced, and effective heat dissipation of the outer wall surface of the crank is achieved, thereby solving the problem of excessive compressor power consumption caused by unreasonable crankshaft structure design in the prior art.

[0037] like Figure 1 As shown, the top of the main shaft 30 is the crankshaft platform 10. The platform 10 has an air passage 60 that communicates with the interior of the main shaft 30. The air passage 60 is used to maintain the oil pressure balance inside the main shaft 30. An oil groove 40 is provided around the connection between the platform 10 and the crank 20. At the bottom of the oil groove 40 is a connecting hole 43 that connects to the second oil hole 33. In fact, the crank is entirely cylindrical, with no oil grooves or oil passages on its surface and no connecting holes or oil passages inside. Therefore, while reducing frictional power consumption caused by the machining of the outer wall surface, the structural strength of the crank 20 can be strengthened.

[0038] like Figure 2 As shown, the oil groove 40 is provided along the outer edge of the crank 20, specifically in the form of a concave annular structure.

[0039] like Figure 2 and Figure 6 As shown, the crankshaft structure also includes a connecting rod 50. The connecting rod 50 has a shaft hole end 51 that connects to the crank 20. The oil groove 40, the bottom of the shaft hole end 51, and the bottom of the crank 20 together form an oil reservoir 41. A gap 42 exists between the inner wall of the shaft hole end 51 and the outer wall of the crank 20. The oil reservoir 41 communicates with the gap 42. The main shaft oil passage 31 communicates with the oil groove 40, allowing refrigerant oil to directly enter the oil reservoir 41 from inside the main shaft. When the connecting rod 50 and the crank 20 work together, the oil in the oil reservoir 41 can lubricate and cool the crankshaft structure along the gap 42.

[0040] Furthermore, the spindle oil passage 31 is spirally arranged on the surface of the spindle 30. A first oil hole 32 is provided at the end of the spindle 30 away from the platform 10. A second oil hole 33 is provided at the end of the spindle 30 closer to the platform 10. The second oil hole 33 communicates with the oil groove 40. Both the first oil hole 32 and the second oil hole 33 are connected to the spindle oil passage 31. This arrangement allows the spindle oil passage 31 to lubricate and cool the surface of the spindle 30 while transporting oil.

[0041] In an optional embodiment, the spindle 30 is connected to the oil pump, the first oil hole 32 is connected to the spindle 30, and the oil flows along the spiral channel to the second oil hole 33 and then enters the oil storage chamber 41 through the connecting hole 43.

[0042] like Figure 5 As shown, a connecting hole 43 is provided at the bottom of the oil groove 40. The connecting hole 43 communicates with the second oil hole 33, so that the oil groove 40 is connected to the spindle oil passage 31. The two ends of the connecting hole 43 are the second oil hole 33 and the oil groove 40, respectively. The connecting hole 43 can be any one of a straight hole, an oblique hole, or a spiral hole. Figure 6 The pin hole end 61 and the connecting rod 62 are also shown.

[0043] Furthermore, the central axis of the connecting hole 43 and the central axis of the main shaft 30 form a first plane. The central axis of the crank 20 and the central axis of the main shaft 30 form a second plane. The angle between the first plane and the second plane is A1, 63°≤A1≤68°, and / or, the angle between the central axis of the connecting hole 43 and the central axis of the main shaft 30 is A2, 34°≤A2≤38°. This arrangement ensures that the outlet of the connecting hole 43 is far from the central axis of the main shaft 30, and that the position of the connecting hole 43 relative to the crank 20 is the same as the direction of rotation of the crankshaft, thus significantly improving the lubrication effect. Optionally, the angle between the central axis of the connecting hole 43 and the central axis of the crank 20 is A3, 34°≤A3≤38°.

[0044] To further ensure the lubrication effect of the refrigeration oil, the width of the oil groove 40 is L1, and the diameter of the connecting hole 43 is L2. Wherein, 0.53*L1≤L2≤0.55*L1. This arrangement ensures a stable and orderly flow of refrigeration oil in the oil storage chamber 41, guaranteeing uniform lubrication throughout.

[0045] Furthermore, the inner diameter of the shaft hole end 51 is the same as the outer diameter of the crank 20. The outer diameter of the shaft hole end 51 is the same as the inner diameter of the oil groove 40. The inner side of the shaft hole end 51 has a groove 511. The gap 42 includes the groove 511. This arrangement improves the connection stability between the connecting rod 50 and the crank 20, while ensuring the airtightness of the oil reservoir 41. The upper and lower sides of the shaft hole end 51 have arc-shaped steps 63.

[0046] Optionally, there is a first height difference H1 between the bottom plane of the oil tank 40 and the main plane 12 of the platform 10, where 0.5mm ≤ H1 ≤ 1mm. There is also a first height difference H2 between the top of the annular protrusion 11 and the bottom plane of the oil tank 40, where 1mm ≤ H2 ≤ 1.5mm. The oil tank 40 has a concave structure, and the above arrangement ensures the oil storage effect of the oil tank.

[0047] Furthermore, when the shaft end 51 is connected to the crank 20, the oil in the main shaft oil passage 31 can enter the oil storage chamber 41 through the connecting hole 43. The oil in the oil storage chamber 41 can enter the gap 42 in the first direction to perform lubrication on at least one of the crank 20 and the shaft end 51. After the connecting rod 50 is engaged with the crank 20, the lower end face of the shaft end 51 maintains a certain gap 42 with the bottom surface 65 of the oil groove, thus forming a sealed cavity together with the outer wall surface 66 of the crank and the outer wall surface 67 of the oil groove. During operation, lubricating oil continuously enters the oil groove 40 from the second oil hole 33 of the crankshaft, the main shaft oil passage 31, the first oil hole 32 and the connecting hole 43, and is confined within the sealed cavity formed by the connecting rod 50 and the oil groove. The lubricating oil in the oil storage chamber can only flow out through the gap formed between the inner side of the shaft end and the crank. During its upward flow, it can lubricate the outer wall surface of the crank to improve the heat dissipation performance of the crank and reduce the power consumption of the compressor.

[0048] According to another specific embodiment of the present invention, a compressor is provided, including a crankshaft structure, wherein the crankshaft structure is the crankshaft structure in the above embodiment.

[0049] As can be seen from the above embodiments, this application designs a crankshaft structure that can be externally oiled. An oil groove is provided at the connection between the crank and the platform, and a connecting hole at a specific angle is provided at the bottom of the oil groove, which changes the running path of the refrigeration oil to improve the heat dissipation performance of the crank and reduce the power consumption of the compressor.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A crankshaft structure, characterized in that, The crankshaft structure includes a platform (10) and cranks (20) and a main shaft (30) respectively disposed on both sides of the platform (10). An annular protrusion (11) is provided on the platform (10). The cranks (20) are located inside the annular protrusion (11). Part of the outer wall surface of the cranks (20), the inner wall surface of the annular protrusion (11) and the platform (10) together form an oil groove (40). The main shaft (30) has a main shaft oil passage (31) inside, and the main shaft oil passage (31) is connected to the oil groove (40). The crankshaft structure also includes a connecting rod (50), which has a shaft hole end (51) connected to the crank (20). The oil groove (40), the bottom of the shaft hole end (51) and the bottom of the crank (20) together form an oil reservoir (41). There is a gap (42) between the inner wall of the shaft hole end (51) and the outer wall of the crank (20). The oil reservoir (41) communicates with the gap (42). The bottom of the oil groove (40) is provided with a connecting hole (43), and the end of the main shaft (30) near the platform (10) is provided with a second oil hole (33). The connecting hole (43) is connected to the second oil hole (33) so that the oil groove (40) is connected to the main shaft oil passage (31). The central axis of the connecting hole (43) and the central axis of the main shaft (30) form a first plane, and the central axis of the crank (20) and the central axis of the main shaft (30) form a second plane. The included angle between the first plane and the second plane is A1, 63°≤A1≤68°, and / or the included angle between the central axis of the connecting hole (43) and the central axis of the main shaft (30) is A2, 34°≤A2≤38°.

2. The crankshaft structure according to claim 1, characterized in that, The main spindle oil passage (31) is spirally arranged on the surface of the main spindle (30). The main spindle (30) is provided with a first oil hole (32) at one end away from the platform (10), and a second oil hole (33) is connected to the oil groove (40). Both the first oil hole (32) and the second oil hole (33) are connected to the main spindle oil passage (31).

3. The crankshaft structure according to claim 1, characterized in that, The width of the oil groove (40) is L1, and the diameter of the connecting hole (43) is L2, wherein 0.53*L1≤L2≤0.55*L1.

4. The crankshaft structure according to claim 2, characterized in that, The inner diameter of the shaft hole end (51) is the same as the outer diameter of the crank (20), the outer diameter of the shaft hole end (51) is the same as the inner diameter of the oil groove (40), the inner side of the shaft hole end (51) has a groove (511), and the gap (42) includes the groove (511).

5. The crankshaft structure according to any one of claims 1 to 2, characterized in that, The bottom plane of the oil tank (40) and the main plane (12) of the platform (10) have a first height difference H1, 0.5mm≤H1≤1mm, and the top of the annular protrusion (11) and the bottom plane of the oil tank (40) have a first height difference H2, 1mm≤H2≤1.5mm.

6. The crankshaft structure according to claim 1, characterized in that, When the shaft end (51) is connected to the crank (20), the oil in the main shaft oil passage (31) can enter the oil storage chamber (41) through the connecting hole (43), and the oil in the oil storage chamber (41) can enter the gap (42) in the first direction to perform lubrication on at least one of the crank (20) and the shaft end (51).

7. A compressor comprising a crankshaft structure, characterized in that, The crankshaft structure is the crankshaft structure according to any one of claims 1 to 6.

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