Rotating shaft structure capable of effectively reducing oil circulation rate

Abstract

The utility model relates to the technical field of compressors, and discloses a rotating shaft structure capable of effectively reducing the oil circulation rate, the rotating shaft structure comprises an eccentric shaft, a spiral piece and a shaft sleeve, a circulation channel is formed in the eccentric shaft along the axial direction of the eccentric shaft, the circulation channel is provided with a first circulation port and a second circulation port which are oppositely arranged, and the first circulation port is communicated with the second circulation port. The spiral piece is fixed in the circulation channel and close to the first circulation opening, the shaft sleeve is arranged outside the first circulation opening in a sleeving mode, a third circulation opening communicated with the first circulation opening is formed in the shaft sleeve, and the circulation area of the third circulation opening is smaller than that of the first circulation opening; the utility model has the following technical effects: lubrication and sealing of each assembly of the pump are ensured, the problem of oil absorption increase caused by high rotating speed is reduced, the oil circulation rate is effectively reduced, and the heat exchange efficiency and stability of a system are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a rotating shaft structure for effectively reducing the oil circulation rate. Background Art

[0002] The oil circulation rate is an important index for measuring the performance of a compressor, which is directly related to the operating efficiency, reliability and service life of the compressor.

[0003] In a rotary compressor, an appropriate amount of lubricating oil circulation can ensure good lubrication and cooling of each component of the compressor, reduce wear and heat accumulation, thereby improving the overall performance of the compressor.

[0004] When the compressor is running, the spiral fins inside the eccentric shaft will absorb oil during operation to supply oil to each component of the pump, achieving the function of lubrication and sealing. However, at high speeds, the oil absorption of the pump increases and is discharged from the compressor together with the refrigerant gas, resulting in an excessively high oil circulation rate, causing the lubricating oil to circulate excessively in the system, increasing the burden on the oil separator, and even possibly bringing too much lubricating oil into the refrigeration system, affecting the heat exchange efficiency and stability of the system. Summary of the Utility Model

[0005] In order to solve the deficiencies of the existing technology, the utility model provides a rotating shaft structure for effectively reducing the oil circulation rate, which realizes ensuring the lubrication and sealing of each component of the pump while reducing the problem of increased oil absorption due to high speeds, effectively reducing the oil circulation rate, and ensuring the heat exchange efficiency and stability of the system.

[0006] The technical purpose to be achieved by the utility model is realized through the following technical solutions:

[0007] The utility model provides a rotating shaft structure for effectively reducing the oil circulation rate, and the rotating shaft structure includes an eccentric shaft, spiral fins and a bushing;

[0008] A circulation channel is formed inside the eccentric shaft along its axial direction, the circulation channel has a first circulation port and a second circulation port arranged oppositely, and the spiral fins are fixed inside the circulation channel and close to the position of the first circulation port;

[0009] The bushing is sleeved outside the first circulation port, and a third circulation port communicated with the first circulation port is formed on the bushing;

[0010] The circulation area of the third circulation port is smaller than the circulation area of the first circulation port.

[0011] In some implementation manners, the bushing includes a first connection surface and a second connection surface formed by enclosing along the edge of the first connection surface;

[0012] The third flow port is formed on the first connection surface, and the second connection surface is connected to the eccentric shaft. The first connection surface plays a certain role in blocking the first flow port, and the second connection surface realizes the fixed connection effect of the bushing.

[0013] In some implementation manners, a first connection portion for connecting with the eccentric shaft is formed on the second connection surface, and a second connection portion is formed on the eccentric shaft at a position corresponding to the first connection portion. The connection relationship between the bushing and the eccentric shaft is realized through the cooperation relationship between the first connection portion and the second connection portion.

[0014] In some implementation manners, the first connection portion is an annular protrusion, and the second connection portion is an annular groove, realizing the connection relationship between the bushing and the eccentric shaft.

[0015] In some implementation manners, the first connection portion includes a plurality of convex points spaced apart on the second connection surface, and the second connection portion includes a plurality of concave positions for respectively matching with the plurality of convex points, realizing the connection relationship between the bushing and the eccentric shaft.

[0016] In some implementation manners, a plurality of fourth flow ports are formed in the eccentric shaft along its radial direction, and the plurality of fourth flow ports communicate with the flow channel. Through the fourth flow ports, the lubricating oil in the flow channel is drained to the outside of the eccentric shaft, playing a role in lubricating and sealing each component of the pump.

[0017] In some implementation manners, the spiral piece includes a spiral portion and a spreading portion extending in opposite directions;

[0018] A fixing portion is formed in the flow channel, and the spiral portion abuts against the fixing portion to ensure the installation stability of the spiral piece.

[0019] In some implementation manners, an axle plug is further included. The axle plug is disposed in the flow channel and is located at the middle position of the flow channel. The flow rate of the lubricating oil in the flow channel is reduced through the axle plug to relieve the oil circulation rate.

[0020] In some implementation manners, the flow channel includes a first flow portion and a second flow portion connected to each other, and the inner diameter of the first flow portion is larger than the inner diameter of the second flow portion;

[0021] The spiral piece is located in the first flow portion, and the axle plug is located in the second flow portion.

[0022] In some implementation manners, the fixing portion is formed at the connection between the first flow portion and the second flow portion.

[0023] In summary, the present utility model has at least the following advantages:

[0024] The rotating shaft structure provided by the utility model for effectively reducing the oil circulation rate sleeved with a shaft sleeve outside the first flow port, and making the flow area of the third flow port smaller than that of the first flow port, plays a certain obstructive role in the lubricating oil flowing out of the first flow port, reduces the flow rate of the lubricating oil, while ensuring the lubrication and sealing of each component of the pump, reduces the problem of increased oil absorption due to high rotation speed, effectively reduces the oil circulation rate, and ensures the heat exchange efficiency and stability of the system. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the rotating shaft structure provided by Embodiment 1 of the utility model;

[0026] Figure 2 It is a cross-sectional view of the rotating shaft structure provided by Embodiment 1 of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the shaft sleeve provided by Embodiment 1 of the utility model;

[0028] Figure 4 It is a cross-sectional view of the eccentric shaft provided by Embodiment 1 of the utility model;

[0029] Figure 5 It is a schematic diagram of the structure of the shaft sleeve provided by Embodiment 2 of the utility model;

[0030] Figure 6 It is a schematic diagram of the structure of the eccentric shaft provided by Embodiment 2 of the utility model;

[0031] Figure 7 It is a schematic diagram of the structure of the spiral piece provided by Embodiment 3 of the utility model;

[0032] Figure 8 It is a cross-sectional view of the rotating shaft structure provided by Embodiment 3 of the utility model;

[0033] 100. Eccentric shaft; 110. Flow channel; 111. First flow port; 112. Second flow port; 113. Fixed part; 114. First flow part; 115. Second flow part; 120. Second connection part; 130. Fourth flow port;

[0034] 200. Spiral piece; 210. Spiral part; 220. Expanded part;

[0035] 300. Shaft sleeve; 310. Third flow port; 320. First connection surface; 330. Second connection surface; 331. First connection part;

[0036] 400. Axial plug. Detailed Embodiments

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some but not all of the embodiments of the present utility model.

[0038] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0039] Example 1:

[0040] Please refer to Figures 1 - 4 , a rotating shaft structure that effectively reduces the oil circulation rate, which is applied to a compressor. During the operation of the compressor, it can absorb oil and supply oil to each component of the pump, achieving the functions of lubrication and sealing.

[0041] The rotating shaft structure includes an eccentric shaft 100, a spiral vane 200, and a bushing 300. A flow channel 110 for guiding lubricating oil is formed inside the eccentric shaft 100 along its axial direction. The flow channel 110 penetrates both ends of the eccentric shaft 100 and has a first flow port 111 and a second flow port 112 arranged oppositely, enabling the lubricating oil to enter and flow out through the flow channel 110. For example, the lubricating oil enters the flow channel 110 through the second flow port 112 and then flows out through the second flow port 112.

[0042] The spiral vane 200 is fixed inside the flow channel 110 and near the position of the first flow port 111. Understanding in combination with the traditional compressor structure and working principle, during the operation of the compressor, the rotation of the eccentric shaft 100 will drive the spiral vane 200 to rotate synchronously. The lubricating oil is subjected to the negative pressure generated by the rotation of the spiral vane 200, enters the flow channel 110 through the second flow port 112, and finally flows out through the first flow port 111.

[0043] The bushing 300 is sleeved outside the first flow port 111, and a third flow port 310 communicating with the first flow port 111 is formed on the bushing 300. The flow area of the third flow port 310 is smaller than the flow area of the first flow port 111.

[0044] It is known that after the lubricating oil enters the flow channel 110 through the second flow port 112, it flows out through the first flow port 111. In order to provide a certain resistance to the lubricating oil flowing out through the first flow port 111 and reduce the flow rate of the lubricating oil, in this example, the bushing 300 is sleeved outside the first flow port 111, and the flow area of the third flow port 310 is made smaller than the flow area of the first flow port 111.

[0045] For ease of understanding, it is assumed here that both the first flow port 111 and the third flow port 310 are circular flow ports, and the flow area of the third flow port 310 is smaller than the flow area of the first flow port 111, that is, the radius of the third flow port 310 is smaller than the radius of the first flow port 111. It should be noted that in this example, the shapes of the first flow port 111 and the third flow port 310 are not restricted and can also be triangular, quadrilateral, etc., which can be adjusted according to actual needs. When the lubricating oil enters the flow channel 110 through the second flow port 112, when passing through the connection between the first flow port 111 and the third flow port 310, due to the relatively small flow area of the third flow port 310, the flow rate of the lubricating oil is reduced, and the problem of increased oil absorption due to high rotational speed is reduced, achieving the purpose of effectively reducing the oil circulation rate and ensuring the heat exchange efficiency and stability of the system.

[0046] Reference Figure 3 In some embodiments, the bushing 300 includes a first connection surface 320 and a second connection surface 330 formed by enclosing along the edge of the first connection surface 320.

[0047] For example, the first connection surface 320 is a circular connection surface, and the second connection surface 330 encloses to form a hollow cylindrical shape along the outer periphery of the first connection surface 320. It can be understood that the first connection surface 320 and the second connection surface 330 are connected to form a hollow cylindrical cavity structure with an opening.

[0048] Among them, the third flow port 310 is formed on the first connection surface 320, and the first connection surface 320 covers the first flow port 111, achieving a certain blocking effect on the first flow port 111 through the first connection surface 320. And due to the communication relationship between the third flow port 310 and the first flow port 111, the lubricating oil in the flow channel 110 can finally flow out through the third flow port 310. The second connection surface 330 is connected to the eccentric shaft 100. For example, the second connection surface 330 is connected to the outer peripheral surface of the eccentric shaft 100 corresponding to the position of the first flow port 111. Through this connection relationship, the fixed connection effect of the bushing 300 is achieved.

[0049] Reference Figure 3 and Figure 4, in some embodiments, a first connecting portion 331 for connecting with the eccentric shaft 100 is formed on the second connecting surface 330, and a second connecting portion 120 is formed at a position corresponding to the first connecting portion 331 on the eccentric shaft 100. Through the cooperation relationship between the first connecting portion 331 and the second connecting portion 120, the connection relationship between the sleeve 300 and the eccentric shaft 100 is realized.

[0050] During the production and assembly process, to facilitate the fixed connection between the sleeve 300 and the eccentric shaft 100, here, by forming the first connecting portion 331 on the second connecting surface 330 and forming the second connecting portion 120 on the eccentric shaft 100, the fixed connection between the sleeve 300 and the eccentric shaft 100 can be completed without the aid of external tools, improving the convenience and assembly efficiency of the assembly operation.

[0051] In one example, the first connecting portion 331 is an annular protrusion, and the second connecting portion 120 is an annular groove. From the foregoing, the second connecting surface 330 is in the shape of a hollow cylinder. The annular protrusion is formed on the inner peripheral surface of the second connecting surface 330, and the annular groove is formed on the outer peripheral surface of the eccentric shaft 100. Through the alignment and engagement relationship between the annular protrusion and the annular groove, the connection relationship between the sleeve 300 and the eccentric shaft 100 is realized.

[0052] The rotating shaft structure provided in this embodiment, which can effectively reduce the oil circulation rate, realizes the purpose of reducing the oil circulation rate and ensuring the heat exchange efficiency and stability of the system by sleeving the sleeve 300 outside the first flow port 111. At the same time, through the fixed connection method between the first connecting portion 331 and the second connecting portion 120, the convenience and assembly efficiency of the assembly operation between the sleeve 300 and the eccentric shaft 100 are improved.

[0053] Embodiment 2:

[0054] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the rotating shaft structure of the present invention. Please refer to Figure 5 and Figure 6 .

[0055] In this embodiment, the first connecting portion 331 includes a plurality of bumps spaced apart on the second connecting surface 330, and the second connecting portion 120 includes a plurality of recesses for matching with the plurality of bumps one by one. Through the cooperation between the plurality of bumps and the plurality of recesses, the connection relationship between the sleeve 300 and the eccentric shaft 100 is realized.

[0056] For example, the number of bumps is four in total, and the number of recesses is also four in total. The four bumps are evenly spaced along the circumferential direction of the inner peripheral surface of the second connecting surface 330, and the four recesses correspond to the positions of the four bumps one by one and are evenly spaced on the outer peripheral surface of the eccentric shaft 100.

[0057] In some embodiments, the eccentric shaft 100 is formed with a plurality of fourth flow ports 130 in its radial direction. The plurality of fourth flow ports 130 communicate with the flow passage 110. Through the fourth flow ports 130, the lubricating oil in the flow passage 110 is drained to the outside of the eccentric shaft 100, playing a role in lubricating and sealing each component of the pump.

[0058] For example, the number of the fourth flow ports 130 is three, and the three fourth flow ports 130 are distributed at uniform or non-uniform intervals. During the operation of the compressor, the rotation of the eccentric shaft 100 drives the spiral vane 200 to rotate synchronously. The lubricating oil is affected by the negative pressure generated by the rotation of the spiral vane 200 and enters the flow passage 110 through the second flow port 112. Part of the lubricating oil is thrown out through the three fourth flow ports 130 under the action of centrifugal force, and the other part of the lubricating oil flows out through the first flow port 111 after being blocked by the shaft sleeve 300 through the third flow port 310.

[0059] The shaft structure provided in this embodiment effectively reduces the oil circulation rate. By forming the mating connection relationship of a plurality of convex points and a plurality of concave positions, the assembly operation efficiency of the shaft sleeve 300 and the eccentric shaft 100 is improved. Moreover, by forming a plurality of fourth flow ports 130 in the radial direction of the eccentric shaft 100, during the rotation of the eccentric shaft 100, part of the lubricating oil can be thrown out through the plurality of fourth flow ports 130, achieving the effect of lubricating and sealing each component of the pump in different directions.

[0060] Embodiment 3:

[0061] The difference between this embodiment and Embodiment 1 is that in this embodiment, a further structural optimization is made to the shaft structure of the present invention. Please refer to Figure 7 and Figure 8 .

[0062] In this embodiment, the spiral vane 200 includes a spiral portion 210 and a spreading portion 220 extending in opposite directions. A fixing portion 113 is formed in the flow passage 110, and the spiral portion 210 abuts against the fixing portion 113 to ensure the installation stability of the spiral vane 200.

[0063] The spiral portion 210 can better generate a negative pressure effect, and the spreading portion 220 can disperse the lubricating oil after confluence. In one example, the spreading portion 220 is close to the position of the first flow port 111, while the spiral portion 210 is farther from the first flow port 111 relative to the spreading portion 220. The fixing portion 113 can be a card slot or other structures that can abut and fix the spiral portion 210. The specific structure of the fixing portion 113 is not limited here.

[0064] In some embodiments, the rotating shaft structure further includes a shaft plug 400 disposed within the flow passage 110 and located at the middle position of the flow passage 110. The shaft plug 400 can reduce the flow rate of the lubricating oil within the flow passage 110 to relieve the oil circulation rate.

[0065] Further, the flow passage 110 includes a first flow portion 114 and a second flow portion 115 connected to each other. The inner diameter of the first flow portion 114 is larger than that of the second flow portion 115. The spiral fin 200 is located within the first flow portion 114, and the shaft plug 400 is located within the second flow portion 115.

[0066] The spiral fin 200 has a certain radial width to ensure the negative pressure effect generated during the rotation of the spiral fin 200. At the same time, in order to control the oil circulation rate and avoid affecting the heat exchange efficiency and stability of the system, in this example, the flow passage 110 is formed by connecting the first flow portion 114 and the second flow portion 115 with different inner diameters, and the spiral fin 200 is located within the first flow portion 114, and the shaft plug 400 is located within the second flow portion 115.

[0067] Further, the fixing portion 113 is formed at the connection between the first flow portion 114 and the second flow portion 115. Since the inner diameters of the first flow portion 114 and the second flow portion 115 are different, it can be understood that there is a stepped fixing portion 113 at the connection between the first flow portion 114 and the second flow portion 115. By means of the abutting relationship between the stepped structure and the spiral fin 200, the installation of the spiral fin 200 is realized. Of course, in order to further improve the installation stability of the spiral fin 200, the spiral fin 200 can also be installed by means of locking or clamping.

[0068] A rotating shaft structure provided by the present utility model can effectively reduce the oil circulation rate. By sleeving a shaft sleeve outside the first flow port and making the flow area of the third flow port smaller than that of the first flow port, it plays a certain obstructive role in the lubricating oil flowing out of the first flow port, reduces the flow rate of the lubricating oil, while ensuring the lubrication and sealing of each component of the pump, reduces the problem of increased oil absorption due to high rotational speed, effectively reduces the oil circulation rate, and ensures the heat exchange efficiency and stability of the system.

[0069] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0070] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0071] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0072] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being above, over and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0073] Although the description of the present utility model is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the spirit and scope of the appended claims.

Claims

1. A rotating shaft structure that effectively reduces the oil circulation rate, characterized in that, The shaft structure includes an eccentric shaft (100), a spiral piece (200), and a bushing (300); A circulation channel (110) is formed inside the eccentric shaft (100) along its axial direction. The circulation channel (110) has a first circulation port (111) and a second circulation port (112) arranged oppositely. The spiral piece (200) is fixed inside the circulation channel (110) and near the position of the first circulation port (111); The bushing (300) is sleeved outside the first circulation port (111), and a third circulation port (310) communicating with the first circulation port (111) is formed on the bushing (300); The circulation area of the third circulation port (310) is smaller than that of the first circulation port (111).

2. The shaft structure for effectively reducing the oil circulation rate according to claim 1, characterized in that, The bushing (300) includes a first connection surface (320) and a second connection surface (330) formed by enclosing along the edge of the first connection surface (320); The third circulation port (310) is formed on the first connection surface (320), and the second connection surface (330) is connected to the eccentric shaft (100).

3. The shaft structure for effectively reducing the oil circulation rate according to claim 2, characterized in that A first connection portion (331) for connecting with the eccentric shaft (100) is formed on the second connection surface (330), and a second connection portion (120) corresponding to the position of the first connection portion (331) is formed on the eccentric shaft (100).

4. The rotating shaft structure for effectively reducing the oil circulation rate according to claim 3, wherein The first connection portion (331) is an annular protrusion, and the second connection portion (120) is an annular groove.

5. The shaft structure for effectively reducing the oil circulation rate according to claim 3, characterized in that The first connection portion (331) includes a plurality of convex points spaced apart on the second connection surface (330), and the second connection portion (120) includes a plurality of concave positions for matching with the plurality of convex points one by one.

6. The shaft structure for effectively reducing the oil circulation rate according to claim 1, characterized in that, The eccentric shaft (100) forms a plurality of fourth circulation ports (130) along its radial direction, and the plurality of fourth circulation ports (130) communicate with the circulation channel (110).

7. The shaft structure for effectively reducing the oil circulation rate according to claim 1, characterized in that, The spiral piece (200) includes a spiral portion (210) and an unfolded portion (220) extending in opposite directions; A fixing portion (113) is formed inside the circulation channel (110), and the spiral portion (210) abuts against the fixing portion (113).

8. The rotating shaft structure for effectively reducing the oil circulation rate according to claim 7, characterized in that, It further includes a shaft plug (400). The shaft plug (400) is arranged inside the circulation channel (110) and at the middle position of the circulation channel (110).

9. The shaft structure for effectively reducing the oil circulation rate according to claim 8, characterized in that, The circulation channel (110) includes a first circulation part (114) and a second circulation part (115) connected to each other. The inner diameter of the first circulation part (114) is larger than that of the second circulation part (115); The spiral piece (200) is located inside the first circulation part (114), and the shaft plug (400) is located inside the second circulation part (115).

10. The shaft structure for effectively reducing the oil circulation rate according to claim 9, characterized in that The fixing portion (113) is formed at the connection between the first circulation part (114) and the second circulation part (115).

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