Main shaft with oil return hole and compressor
By setting up oil return holes on the main shaft of the compressor, the problem of oil shortage on the top of the steel ball is solved, the continuous lubrication of the steel ball is achieved, and the service life of the compressor is extended.
Patent Information
- Application Number
- CN202422023382.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-20
AI Technical Summary
In the sway compressor, the top of the steel ball is prone to lack of oil, resulting in insufficient lubrication and increasing the risk of compressor failure.
A main shaft with an oil return hole is designed, and an oil return channel for supplying oil to the steel ball is formed by providing a first oil return hole in the shaft body that communicates with the oil hole in the front cover and a second oil return hole in the first oil return hole and the oil hole in the swash plate.
Through the oil return channel, lubricating oil is continuously supplied to the steel ball, meeting the lubrication needs of the entire steel ball, extending the operating state of the compressor and improving its durability.
Smart Images
Figure CN222924564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to a main shaft with an oil return hole and a compressor. Background Technique
[0002] For the steel ball lubrication of a wobble plate compressor, most of the lubricating oil is splashed in the wobble plate box by the rotation of the main shaft swash plate assembly and the planetary disc component. Part of the lubricating oil enters the opening where the oscillating gear and the fixed gear mesh, and then seeps into the surface of the steel ball where oil leaks out to form an oil film to lubricate the steel ball. There is an oil storage blind hole at the bottom of the steel ball, which can store part of the lubricating oil under the action of gravity to lubricate the bottom of the steel ball. In theory, after the splashed lubricating oil enters the rear thrust bearing, part of the lubricating oil may seep into the planetary disc and enter the top of the steel ball through the oil hole of the planetary disc for lubrication. However, in practice, a considerable proportion of the malfunctioning machines in the market are caused by lack of oil and burning of the steel balls.
[0003] In addition, for a wobble plate compressor, since there is an L-shaped thrust piece in the rear thrust bearing blocking the oil hole of the planetary disc, it is very difficult for the lubricating oil to seep to the oil hole of the planetary disc. In this way, the top of the steel ball cannot be effectively lubricated. The oscillating gear, the steel ball, and the fixed gear are in cooperative movement, and the gap between the three is very small. The lubricating oil entering through the opening where the oscillating gear and the fixed gear mesh is limited. It is very unlikely to lubricate the top of the steel ball by the steel ball itself rotating to bring the lubricating oil to the oil hole of the planetary disc. Moreover, the steel ball only rotates 360° occasionally. Usually, it rotates in a circular motion around the main shaft. Therefore, it is difficult to lubricate the top of the steel ball. After long-term operation or high-load operation, the steel ball will be worn or burned due to lack of oil, the internal load of the compressor will increase, the clutch will be burned due to high temperature, and the compressor cannot work normally. In severe cases, the steel ball and the oscillating gear will sinter together and the inside of the compressor will be completely stuck. Content of the Utility Model
[0004] Based on this, in view of the technical problem that the top of the steel ball of the existing compressor is prone to lack of oil, it is necessary to provide a main shaft with an oil return hole and a compressor.
[0005] A main shaft with an oil return hole is applied to a compressor. The compressor includes a front cover, a swash plate, a planetary disc, a steel ball, and a fixed gear arranged in sequence. The steel ball is rotatably arranged on the fixed gear. The main shaft is rotatably connected to the front cover. One end of the main shaft is embedded in the swash plate. The swash plate is connected to the planetary disc through a rear thrust bearing. The main shaft with an oil return hole includes:
[0006] The shaft body is provided with a first oil return hole communicating with the oil hole on the front cover, and a second oil return hole communicating with the first oil return hole and the oil hole of the swash plate. The oil hole on the front cover, the first oil return hole, the second oil return hole and the oil hole of the swash plate are communicated to form an oil return passage for supplying oil to the steel balls.
[0007] In one embodiment, the first oil return hole penetrates the shaft body along the radial direction of the shaft body.
[0008] In one embodiment, the second oil return hole extends along the axial direction of the shaft body, and the second oil return hole extends from the end of the shaft body facing the swash plate to the first oil return hole.
[0009] In one embodiment, the second oil return hole includes:
[0010] A first hole section communicating with the first oil return hole;
[0011] A second hole section communicating with the first hole section;
[0012] Wherein, the diameter of the first hole section is smaller than that of the second hole section.
[0013] In one embodiment, the diameter dimension range of the first hole section is 3 - 5 mm.
[0014] In one embodiment, the diameter dimension range of the second hole section is 6 - 8 mm.
[0015] In one embodiment, the first oil return hole and the second oil return hole penetrate each other.
[0016] In one embodiment, the diameter dimension range of the first oil return hole is 2 - 4 mm.
[0017] In one embodiment, the first oil return hole is arranged at a position corresponding to the main shaft bearing on the shaft body.
[0018] A compressor, the compressor includes a main shaft having an oil return hole as described above.
[0019] Advantages of the present utility model:
[0020] The utility model provides a main shaft with an oil return hole. By arranging a first oil return hole on the shaft body that communicates with the oil hole of the front cover, and a second oil return hole that communicates with the first oil return hole and the oil hole of the swash plate, the oil hole of the front cover, the first oil return hole, the second oil return hole, and the oil hole of the swash plate are interconnected to form an oil return channel for supplying oil to the top of the steel balls. Thus, when the compressor is running, lubricating oil can be continuously supplied to the steel balls through the oil return channel, so as to meet the lubrication of the entire steel balls under the action of pressure, and further enable the compressor to have a better operating state, ensuring the durability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a sectional view of a compressor provided by an embodiment of the utility model;
[0022] Figure 2 is a sectional view of the main shaft with an oil return hole provided by an embodiment of the utility model;
[0023] Figure 3 is an external contour view of the main shaft with an oil return hole provided by an embodiment of the utility model.
[0024] Reference numerals:
[0025] main shaft 1; shaft body 110; first oil return hole 111; second oil return hole 112; first hole section 1121; second hole section 1122; shaft seal retaining ring 2; shaft seal 3; front cover 4; front cover sealing ring 5; cylinder block 6; swash plate 7; oil plug 8; planetary disk 9; connecting rod 10; piston 11; piston ring 12; cylinder gasket 13; valve plate assembly 14; rear cover gasket 15; rear cover 16; cylinder head bolt 17; adjusting screw 18; spring 19; flat key 20; fixed gear 21; steel ball 22; swing gear 23; rear thrust bearing 24; front thrust bearing 25; main shaft bearing 26; front cover screw 27. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In order to make the above objects, features, and advantages of the utility model more obvious and understandable, the following detailed description of the specific embodiments of the utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.
[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0029] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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.
[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.
[0032] As Figure 1 shown, an embodiment of the present utility model provides a compressor, and the compressor includes a main shaft 1 having an oil return hole as follows. Specifically, the compressor provided in this embodiment is a wobble plate compressor, which successively includes a front cover 4, a main shaft 1, a swash plate 7, a cylinder block 6, a planetary plate 9, a swing gear 23, a steel ball 22, and a fixed gear 21. The front cover 4 is attached to the end face of the cylinder block 6 through front cover screws 27, the main shaft 1 is connected to the front cover 4 through a main shaft bearing 26, the main shaft 1 is embedded in the swash plate 7, the swash plate 7 is connected to the planetary plate 9 through a rear thrust bearing 24, the swing gear 23 is riveted to the planetary plate 9, the swing gear 23 is connected to the steel ball 22, and the steel ball 22 is connected to the fixed gear 21. A front thrust bearing 25 is provided between the swash plate and the planetary plate. When the wobble plate compressor is working, the centrifugal force generated by the high-speed rotation of the swash plate 7 throws the lubricating oil in the wobble plate box to the oil return hole of the front cover 4. Due to the pressure in the wobble plate box, the lubricating liquid enters the oil hole of the front cover 4, thereby realizing the lubrication of the main shaft bearing 26. The main shaft 1 with oil return provided in the embodiment of the present utility model adds an oil hole at the main shaft bearing 26, and part of the lubricating oil descends along the oil passage of the main shaft 1 to the end face of the swash plate 7, and then directly lubricates the steel ball 22 through the oil hole of the swing gear 23. In this way, the sufficient lubrication of the steel ball 22 can be satisfied, ensuring the normal operation of the compressor and maximally avoiding the failure of the compressor burning the steel ball 22.
[0033] Specifically, the main shaft 1 and the front cover 4 are hermetically connected through the shaft seal retaining ring 2 and the shaft seal 3. The front cover 4 and the cylinder block 6 are fixedly connected by the front cover screws 27, and a front cover sealing ring 5 is provided between the front cover 4 and the cylinder block 6 to seal the front cover 4 and the cylinder block 6, thereby preventing oil leakage. An oil plug 8 is provided on the cylinder block 6 to seal the cavity of the cylinder block 6. A connecting rod 10, a piston 11, piston rings 12, etc. are also provided in the cylinder. One end of the connecting rod 10 is connected to the planetary disk 9, and the other end is connected to the piston 11. The compressor further includes a rear cover 16, a rear cover gasket 15, a valve plate assembly 14, and a cylinder gasket 13. The rear cover 16 is arranged at the farthest end of the cylinder block 6 away from the front cover 4. Above the rear cover 16 are the rear cover gasket 15, the valve plate assembly 14, and the cylinder gasket 13 in sequence. These components are fixedly connected to the cylinder block 6 by bolts. The rear cover 16 is fixedly connected to the cylinder block 6 by the cylinder head bolts 17. The fixed gear 21 is connected to the cylinder block 6 by a flat key 20, and a spring 19 is arranged in the cavity of the fixed gear 21. The cylinder gasket 13 is connected to the fixed gear 21 by an adjusting screw 18. The working principle of the compressor is prior art and will not be elaborated here.
[0034] Referring to Figures 1 to 3 , an embodiment of the present invention provides a main shaft 1 with an oil return hole, which is applied to a compressor. The compressor includes a front cover 4, a swash plate 7, a planetary disk 9, steel balls 22, and a fixed gear 21 arranged in sequence. The steel balls 22 are rotatably arranged on the fixed gear 21. The main shaft 1 is rotatably connected to the front cover 4. One end of the main shaft 1 is embedded in the swash plate 7. The swash plate 7 is connected to the planetary disk 9 through a rear thrust bearing 24. The main shaft 1 with an oil return hole includes a shaft body 110. A first oil return hole 111 communicating with the oil hole on the front cover 4 is constructed on the shaft body 110, and a second oil return hole 112 communicating with the first oil return hole 111 and the oil hole of the swash plate 7 is also provided. The oil hole on the front cover 4, the first oil return hole 111, the second oil return hole 112, and the oil hole of the swash plate 7 are connected to form an oil return channel for supplying oil to the steel balls 22.
[0035] The present invention provides a main shaft 1 with an oil return hole. By providing a first oil return hole 111 on the shaft body 110 that communicates with the oil hole on the front cover 4, and a second oil return hole 112 that communicates with the first oil return hole 111 and the oil hole of the swash plate 7, the oil hole on the front cover 4, the first oil return hole 111, the second oil return hole 112, and the oil hole of the swash plate 7 are interconnected to form an oil return channel for supplying oil to the top of the steel balls 22. Thus, when the compressor is running, lubricating oil can be continuously supplied to the steel balls 22 through the oil return channel, so as to meet the lubrication of the entire steel balls 22 under the action of pressure. Furthermore, the compressor has a better operating state, ensuring the durability of the compressor.
[0036] Referring to Figures 1 to 3, in one embodiment, the first oil return hole 111 penetrates the shaft body 110 along the radial direction of the shaft body 110. The second oil return hole 112 extends along the axial direction of the shaft body 110, and the second oil return hole 112 extends from the end of the shaft body 110 facing the swash plate 7 to the first oil return hole 111. By penetrating the first oil return hole 111 along the radial direction of the shaft body 110 of the circumferential body, the oil in the oil hole of the front cover 4 can enter the first oil return hole 111 along the radial direction of the main shaft 1. The second oil return hole 112 is arranged to extend along the axial direction of the shaft body 110 so that the second oil return hole 112 can communicate with the oil hole of the swash plate 7.
[0037] Refer to Figures 1 to 3 , in one embodiment, the second oil return hole 112 includes a first hole section 1121 and a second hole section 1122. The first hole section 1121 communicates with the first oil return hole 111; the second hole section 1122 communicates with the first hole section 1121; wherein, the diameter of the first hole section 1121 is smaller than the diameter of the second hole section 1122. Specifically, the diameter dimension range of the first hole section 1121 is 3-5 mm. The diameter dimension range of the second hole section 1122 is 6-8 mm. The first oil return hole 111 and the second oil return hole 112 penetrate each other. With such a setting, the lubricating oil flowing out of the first oil return hole 111 can better enter the second oil return hole 112 and flow into the oil return hole of the swash plate 7 through the second oil return hole 112. In one embodiment, the diameter dimension range of the first oil return hole 111 is 2-4 mm. The first oil return hole 111 is arranged at a position corresponding to the main shaft bearing 26 of the shaft body 110.
[0038] With the above structure, when the compressor is running, a continuous supply of lubricating oil will reach the steel balls 22 through the oil path of the main shaft 1. Under the action of pressure, the lubrication of the entire steel balls 22 can be satisfied, reaching a better state of the compressor operation and ensuring the durability of the compressor.
[0039] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0040] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A main shaft with an oil return hole, used in a compressor, the compressor comprising a front cover, a swash plate, a planetary plate, a steel ball and a fixed gear arranged in sequence, the steel ball is rotatably arranged on the fixed gear, the main shaft is rotatably connected to the front cover, one end of the main shaft is embedded in the swash plate, the swash plate is connected to the planetary plate through a rear thrust bearing, characterized in that: The main shaft with the oil return hole comprises: A shaft body, wherein the shaft body is provided with a first oil return hole connected with the oil hole on the front cover, and a second oil return hole connected with the first oil return hole and the oil hole of the swash plate, the oil hole on the front cover, the first oil return hole, the second oil return hole and the oil hole of the swash plate are connected to form an oil return channel for supplying oil to the steel balls.
2. The spindle with oil return hole according to claim 1, characterized in that: The first oil return hole penetrates the shaft body along a radial direction of the shaft body.
3. The spindle with oil return hole according to claim 2, characterized in that: The second oil return hole extends along the axial direction of the shaft body, and the second oil return hole extends from an end of the shaft body toward one end of the swash plate to the first oil return hole.
4. The main shaft with oil return hole according to claim 3, characterized in that: The second oil return hole comprises: a first hole section, connected to the first oil return hole; a second hole segment, connected to the first hole segment; Wherein, the diameter of the first hole segment is smaller than the diameter of the second hole segment.
5. The main shaft with oil return hole according to claim 4, characterized in that: The diameter of the first hole section ranges from 3 to 5 mm.
6. The main shaft with oil return hole according to claim 4, characterized in that: The diameter of the second hole section ranges from 6 to 8 mm.
7. The main shaft with oil return hole according to claim 3, characterized in that: The first oil return hole and the second oil return hole penetrate each other.
8. The main shaft with oil return hole according to claim 2, characterized in that: The diameter of the first oil return hole ranges from 2 to 4 mm.
9. The main shaft with oil return hole according to any one of claims 1 to 8, characterized in that: The first oil return hole is arranged at a position of the shaft body corresponding to the main shaft bearing.
10. A compressor, characterized in that: The compressor comprises a main shaft having an oil return hole as claimed in any one of claims 1 to 9.