Compressor thrust structure and compressor

Abstract

The compressor thrust structure comprises a support and an upper bearing, the upper bearing comprises an inner ring and an outer ring, the outer ring is connected with the inner side wall of the support in a sleeved mode, the support is provided with a first bottom face, a thrust piece is arranged on the first bottom face, the thrust piece and the inner ring are oppositely arranged, and the thrust piece is arranged on the first bottom face. An oil return opening is formed in the inner side wall and communicates with an oil return assembly. According to the compressor shaft system, the technical problem that in the prior art, when a compressor shaft system moves up and down, other parts can be affected, and consequently the compressor performance is poor can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a compressor thrust structure and a compressor. Background Art

[0002] The compressor shaft system generally uses bearings to support its rotation. At the same time, the shaft system needs to be limited in movement and the bearings need to be lubricated to ensure its operational reliability. If a rolling bearing is used to support the crankshaft for rotation, the shaft system can generally be limited in radial and axial displacement after the crankshaft and the bearing inner ring have an interference fit. Minor displacement can only be achieved by relying on the radial and axial clearances designed into the bearing. Cylindrical bearings or sliding bearings can carry greater loads than ball bearings and are also widely used in compressors. However, using cylindrical bearings or sliding bearings with separate inner and outer rings to support the shaft system requires solving the problem of axial movement of the shaft system interfering with other parts, and generally requires the design of an axial limit structure.

[0003] In the prior art, a bearing is installed at the lower end of the bracket and a bolt locking thrust structure is used on the lower end surface of the bracket to limit the axial movement of the shaft system. However, this structure requires additional screws for fixing, which may cause the screws to loosen due to long-term vibration during operation.

[0004] Since the shaft system of the compressor in the prior art may affect other components when it moves up and down, resulting in technical problems such as poor compressor performance, the present invention studies and designs a compressor thrust structure and a compressor. Summary of the Invention

[0005] Therefore, the present invention provides a compressor thrust structure and a compressor, which can solve the technical problem in the prior art that when the compressor shaft system moves up and down, it affects other components and causes poor compressor performance.

[0006] In order to solve the above problems, the present invention provides a compressor thrust structure, including: a bracket and an upper bearing, the upper bearing including an inner ring and an outer ring, the outer ring is socketed with the inner side wall of the bracket, the bracket has a first bottom surface, a thrust piece is provided on the first bottom surface, the thrust piece is arranged opposite to the inner ring, an oil return port is provided on the inner side wall, and the oil return port is connected to the oil return assembly.

[0007] In some embodiments, a first protrusion is provided on the first bottom surface, and the first protrusion abuts against the outer ring.

[0008] In some embodiments, the first protrusion is annular, a groove is provided on the first bottom surface, the groove is located inside the first protrusion, the thrust member is provided in the groove, and the thickness of the thrust member is greater than the depth of the groove.

[0009] In some embodiments, the height of the first protrusion is greater than the height of the thrust member extending out of the groove, a second channel is formed between the first protrusion and the inner wall, and between the first protrusion and the thrust member, a plurality of first channels are provided on the first protrusion, two second channels are connected through the first channel, and the second channel is connected to the oil return assembly.

[0010] In some embodiments, a support member is provided on the first bottom surface, a first protrusion is provided on the support member, and the first protrusion abuts against the outer ring.

[0011] In some embodiments, the first protrusion is annular, a groove is provided on the support member, the groove is located inside the first protrusion, the thrust member is provided in the groove, and the thickness of the thrust member is greater than the depth of the groove.

[0012] In some embodiments, the height of the first protrusion is greater than the height of the thrust member extending out of the groove, a second channel is formed between the first protrusion and the inner wall, and between the first protrusion and the thrust member, a plurality of first channels are provided on the first protrusion, two second channels are connected through the first channel, and the second channel is connected to the oil return assembly.

[0013] In some embodiments, the first protrusion is socketed with the inner side wall, the height of the first protrusion is greater than the height of the thrust member extending out of the groove, a third channel is formed between the first protrusion and the thrust member, the support member has a second bottom surface facing away from the first protrusion, a second protrusion is provided on the second bottom surface, the second protrusion is annular, the second protrusion and the inner side wall form a second channel, a plurality of first channels are provided on the second protrusion, a plurality of through holes are provided on the support member, the through holes correspond one-to-one to the first channels, the third channel is connected to the first channel through the through holes, the first channel is connected to the second channel, and the second channel is connected to the oil return assembly.

[0014] In some embodiments, a crankshaft hole is provided on the bracket, a crankshaft is provided in the crankshaft hole, a third protrusion is provided on the second protrusion, and the third protrusion is opposite to the shoulder of the crankshaft after passing through the crankshaft hole.

[0015] The present invention also provides a compressor, which includes the aforementioned compressor thrust structure.

[0016] In some embodiments, the compressor includes a cylinder, and the bracket is located in the cylinder; the bracket and the cylinder adopt an integrated structure, or the bracket is sleeved in the cylinder.

[0017] In some embodiments, a sixth channel is provided on the cylinder along the axial direction of the cylinder, and the sixth channel is connected to the outlet of the oil return assembly. A fourth channel is provided on the cylinder along the radial direction of the cylinder, and the sixth channel is connected to the oil pool of the compressor through the fourth channel.

[0018] In some embodiments, a fifth channel is provided on the bracket, the inlet of the fifth channel is connected to the oil return port, the oil return assembly is located outside the cylinder, one end of the oil return assembly passes through the cylinder and is connected to the outlet of the fifth channel, and the other end of the oil return assembly passes through the cylinder and is connected to the oil pool of the compressor.

[0019] The compressor thrust structure and the compressor provided by the present invention have the following beneficial effects:

[0020] By arranging a thrust piece on the inner bottom surface of the bracket, the outer ring of the upper bearing is sleeved with the inner side wall of the bracket, and the outer ring is interference fit with the inner side wall of the bracket, and the inner ring is interference fit with the crankshaft 5. When the shaft system of the compressor moves axially, the thrust piece can limit the inner ring, effectively solving the problem of the shaft system movement of the compressor. Through the oil return port and the oil return assembly, the lubricating oil after passing through the upper bearing can be smoothly diverted to the compressor oil storage tank, thereby improving bearing lubrication and heat dissipation, and improving the performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0022] Figure 1 This is an assembly diagram of the compressor thrust structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the compressor thrust structure of the first embodiment of the present invention. Figure 1 ;

[0024] Figure 3 1 is a schematic structural diagram of an oil return assembly in a compressor thrust structure according to a first embodiment of the present invention;

[0025] Figure 4 1 is a schematic diagram of the D-direction structure of the bracket in the compressor thrust structure according to the first embodiment of the present invention;

[0026] Figure 5 yes Figure 4 A partial enlarged view of

[0027] Figure 6 1 is a schematic structural diagram of the support in the thrust structure of the compressor according to the first embodiment of the present invention, along the E direction;

[0028] Figure 7 1 is a schematic structural diagram of an upper bearing in a compressor thrust structure according to a first embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the second embodiment of the present invention. Figure 1 ;

[0030] Figure 9 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the second embodiment of the present invention. Figure 2 ;

[0031] Figure 10 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the second embodiment of the present invention. Figure 3 ;

[0032] Figure 11 This is a schematic diagram of the compressor thrust structure of the second embodiment of the present invention. Figure 1 ;

[0033] Figure 12 This is a schematic diagram of the compressor thrust structure of the second embodiment of the present invention. Figure 2 ;

[0034] Figure 13 yes Figure 12 Local magnification Figure 1 ;

[0035] Figure 14 yes Figure 12 Local magnification Figure 2 ;

[0036] Figure 15 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the third embodiment of the present invention. Figure 1 ;

[0037] Figure 16 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the third embodiment of the present invention. Figure 2 ;

[0038] Figure 17 This is a schematic diagram of the structure of the support portion of the compressor thrust structure of the third embodiment of the present invention. Figure 3 ;

[0039] Figure 18 1 is a schematic structural diagram of a compressor thrust structure according to a third embodiment of the present invention;

[0040] Figure 19 yes Figure 18 Local magnification Figure 1 ;

[0041] Figure 20 yes Figure 18 Local magnification Figure 2 ;

[0042] Figure 21 This is a schematic diagram of the structure of the support portion of the compressor thrust structure according to the fourth embodiment of the present invention. Figure 1 ;

[0043] Figure 22 This is a schematic diagram of the structure of the support portion of the compressor thrust structure according to the fourth embodiment of the present invention. Figure 2 ;

[0044] Figure 23 This is a schematic diagram of the structure of the support portion of the compressor thrust structure according to the fourth embodiment of the present invention. Figure 3 ;

[0045] Figure 24 1 is a schematic structural diagram of a compressor thrust structure according to a fourth embodiment of the present invention;

[0046] Figure 25 yes Figure 24 Local magnification Figure 1 ;

[0047] Figure 26 yes Figure 24 Local magnification Figure 2 ;

[0048] Figure 27 is an assembly diagram of a compressor thrust structure according to a fifth embodiment of the present invention;

[0049] Figure 28 1 is a schematic structural diagram of a bracket in a compressor thrust structure according to a fifth embodiment of the present invention;

[0050] Figure 29 is an assembly diagram of a compressor thrust structure according to a sixth embodiment of the present invention;

[0051] Figure 30 This is an assembly structural diagram of a compressor thrust structure according to a seventh embodiment of the present invention;.

[0052] The accompanying drawings are:

[0053] 1. Cylinder; 2. Lower cover; 3. Upper cover; 4. Oil guide; 5. Crankshaft; 536. Oil channel; 5360. Bottom plane; 5361. First side plane; 5362. First arc cylindrical surface; 5363. Cutout; 6. Thrust member; 61. Outer ring; 62. Inner ring; 7. Oil guide hole; 8. Moving plate bearing; 9. Pump body assembly; 10. Upper bearing; 11. Bracket; 12. Oil return assembly; 121. Seat; 122. Oil pipe; 1210. Second side plane; 121 1. Third side plane; 1212. Groove portion; 1213. Second arc cylindrical surface; 13. First channel; 14. Inner wall; 15. End portion; 16. First channel; 17. First protrusion; 18. Oil return port; 19. Second channel; 20. Support member; 21. Groove; 22. Second bottom surface; 23. Second protrusion; 24. First bottom surface; 25. Through hole; 26. Third protrusion; 27. Sixth channel; 28. Fourth channel; 29. ​​Fifth channel; 30. Third channel. DETAILED DESCRIPTION

[0054] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] See also Figure 1-30 As shown, according to an embodiment of the present invention, a compressor thrust structure is provided, including: a bracket 11 and an upper bearing 10, the upper bearing 10 including an inner ring 61 and an outer ring 62, the outer ring 62 is sleeved with the inner side wall 14 of the bracket 11, the bracket 11 has a first bottom surface 24, a thrust member 6 is provided on the first bottom surface 24, the thrust member 6 is arranged opposite to the inner ring 61, the inner side wall 14 is provided with an oil return port 18, and the oil return port 18 is connected to the oil return assembly 12. In this technical solution, the first bottom surface 24 is the inner bottom surface of the bracket 11. A thrust member 6 is provided on the inner bottom surface of the bracket 11, and the outer ring 62 of the upper bearing 10 is sleeved with the inner sidewall 14 of the bracket 11. Furthermore, the outer ring 62 and the inner sidewall 14 of the bracket 11 form an interference fit, and the inner ring 61 and the crankshaft 5 form an interference fit. When the compressor shaft system experiences axial movement, the thrust member 6 can limit the inner ring 61, effectively resolving the compressor shaft system movement problem. The oil return port 18 and the oil return assembly 12 allow the lubricating oil after passing through the upper bearing 10 to be smoothly diverted to the compressor oil reservoir, improving bearing lubrication and heat dissipation, and enhancing compressor performance. Preferably, the inner ring 61 can be provided with a flange to increase the contact area between the inner ring 61 and the thrust member 6.

[0059] In some embodiments, a first protrusion 17 is provided on the first bottom surface 24, and the first protrusion 17 abuts the outer ring 62. In this technical solution, the provision of the first protrusion 17 and the abutment with the outer ring 62 can provide support for the outer ring 62 of the upper bearing 10 and also axially limit the outer ring 62 to prevent axial movement of the outer ring 62.

[0060] In some embodiments, the first protrusion 17 is annular, and a groove 21 is provided on the first bottom surface 24. The groove 21 is located inside the first protrusion 17. The thrust member 6 is disposed within the groove 21, and the thickness of the thrust member 6 is greater than the depth of the groove 21. In this technical solution, the bracket 11 has a crankshaft hole for sleevedly receiving the crankshaft 5. The thrust member 6 and the groove 21 are both annular. Preferably, the inner sidewall of the groove 21 penetrates the inner sidewall of the bracket 11. When the thrust member 6 is installed in the groove 21, the thrust member 6 can effectively limit the axial movement of the inner ring 61.

[0061] In some embodiments, the height of the first protrusion 17 is greater than the height of the portion of the thrust member 6 extending out of the groove 21, and a second channel 19 is formed between the first protrusion 17 and the inner wall 14, and between the first protrusion 17 and the thrust member 6. A plurality of first channels 16 are provided on the first protrusion 17, and two second channels 19 are connected through the first channel 16, and the second channel 19 is connected to the oil return assembly 12. In this technical solution, a second channel 19 is formed between the first protrusion 17 and the inner side wall 14, and between the first protrusion 17 and the thrust member 6. A plurality of first channels 16 are provided on the first protrusion 17. Two second channels 19 are connected through the first channel 16. The second channel 19 is connected to the oil return assembly 12. The second channel 19 is an annular circumferential channel, and the first channel 16 is a radial channel. Preferably, a groove can be provided on the first protrusion 17 along the radial direction of the bracket 11 to form the first channel 16. The second channels 19 inside and outside the first protrusion 17 are connected through the first channel 16, so that the lubricating oil after passing through the upper bearing 10 will all flow into the oil return assembly 12, thereby smoothly guiding it to the compressor oil storage tank.

[0062] See also Figures 2 to 7 As shown, a thrust member 6 accommodating groove 21 is provided at the bottom of the bearing chamber on the bracket 11, and the thrust member 6 is placed in the groove 21. The thrust member 6 can be assembled and fixed by relying on the interference fit between the outer ring diameter of the thrust member and the inner diameter of the accommodating groove. Preferably, a radial protrusion is provided on the outer peripheral wall of the thrust member 6, and a fixing groove is provided on the side wall of the groove 21. The radial protrusion of the thrust member 6 and the fixing groove cooperate with each other to limit the assembly and fixation.

[0063] At the same time, a circumferential annular second channel 19 and a radial first channel 16 are provided at the bottom of the bearing chamber, wherein the first channel 16 is connected to the second channel 19; and an oil return port 18 is provided outside the bearing chamber, which is connected to the bearing chamber and is connected to the circumferential annular second channel 19; the lubricating oil enters the upper bearing 10 for lubrication and carries a large amount of heat generated by the operation of the bearing along the second channel 19 → first channel 16 → second channel 19 → oil return port 18 into the oil channel of the oil return assembly 12 and returns to the oil storage tank at the bottom of the compressor.

[0064] The oil return port 18 has a bottom plane 5360, a side plane 5361, an arc-shaped cylindrical surface 5363, and an oil channel cutout 5362. The oil return assembly 12 consists of a base portion 121 and an oil pipe portion 122. The base portion 121 is shaped like a block, with side planes 1210 / 1211, an arc-shaped cylindrical surface 1213, a groove portion 1212, and a through hole. The oil pipe portion 122 is inserted into the through hole of the base portion 121 for assembly.

[0065] When the oil return assembly 12 is installed correspondingly to the oil return port 18, the side plane 1210 and the bottom plane 5360, the side plane 1211 and the side plane 5361, and the arc cylinder 1213 and the arc cylinder 5363 are placed and assembled in a one-to-one corresponding manner.

[0066] The first protrusion 17 is used to limit the support of the upper bearing 10. The upper bearing 10 is a cylindrical rolling bearing with separated inner and outer rings, including an outer ring 61 and an inner ring 62 with a flange. The outer ring is assembled with an interference fit on the inner wall 14 of the bearing chamber, and the inner ring is installed on the crankshaft 5 with an interference fit; when the upper bearing 10 is pressed into place, the lower end face of the outer ring 61 of the upper bearing 10 and the end face of the first protrusion 17 contact each other, and the upper bearing 10 is axially pressed into place; the thrust member 6 is installed below the bearing 6 to support and limit the axial movement of the shaft system.

[0067] The compressor thrust structure using the first embodiment described above has a simple structure, reduces parts processing and assembly, avoids the use of screws in the prior art to install and fix the thrust components, and reduces the risk of failure caused by loose screws.

[0068] The compressor thrust structure of the first embodiment is designed based on a casing in which the cylinder 1 and the bracket 11 are integrally formed. If the distance between the end face of the cylinder and the end face of the thrust member 6 is small, the tool can be shorter to meet the processing requirements when processing the structural features of the second channel 19 and the first channel 16. At this time, the thrust return oil structure has good adaptability to the processing of the integrated casing and does not affect the processing quality of other internal structural features of the casing, such as the oil channel structure at the bottom of the bearing chamber.

[0069] If the distance between the cylinder end face and the thrust member 6 end face is very large, such as in large displacement models where the tooth height is required, the distance between the cylinder end face and the thrust member 6 end face is very large, and a very long machining tool is required. In this case, when machining the smaller second passage 19 and first passage 16 of the thrust structure on the first bottom surface 24 of the upper bearing chamber, a long and thin tool is required. During the machining process, the tool is prone to shaking and jittering, and the machined surface will have serious vibration marks, resulting in a rough and uneven surface and poor machining quality. In severe cases, the inner wall surface of the already machined bearing chamber may be damaged, causing the machine housing to be scrapped due to unqualified machining quality.

[0070] The compressor thrust structure of the present invention integrates a bracket and housing into an integrated structure to improve the connection rigidity between the bracket and housing, thereby reducing the impact of vibration and shock on compressor operation. Based on this integrated structure, a combined structure is proposed, integrating the axial thrust and the oil return passage in the bearing cavity relative to the bracket. This effectively prevents axial movement of the shaft system from interfering with other parts during compressor operation, while also addressing bearing lubrication, heat dissipation, and smooth circulation of lubricating oil back to the oil reservoir. Furthermore, a combined structure scheme in which the thrust and oil passage are separated relative to the bracket is proposed to address the problem of substandard bearing cavity machining quality and difficult machining control caused by tool vibration during machining, as the smaller oil return passage structure can only be machined using a slender tool.

[0071] In some embodiments, a support member 20 is provided on the first bottom surface 24, and a first protrusion 17 is provided on the support member 20, which abuts the outer ring 62. In this technical solution, by providing the support member 20 on the inner bottom surface of the bracket 11, the support member 20 further enhances the support function of the upper bearing 10. Furthermore, the support member 20 is annular, and by providing the first protrusion 17 on the support member 20, the first protrusion 17 abuts the outer ring 62, thereby providing support for the outer ring 62 of the upper bearing 10 and also axially limiting the outer ring 62 to prevent axial movement of the outer ring 62.

[0072] In the compressor thrust structure of the present invention, the thrust member 6 can be a steel backing substrate with a wear-resistant coating on the surface, such as PTFE, and the outer structure can be a circular ring or a special-shaped structure.

[0073] In some embodiments, the first protrusion 17 is annular, and the support member 20 is provided with a groove 21 located inside the first protrusion 17. The thrust member 6 is disposed within the groove 21, and the thickness of the thrust member 6 is greater than the depth of the groove 21. In this technical solution, the support member 20 abuts against the first bottom surface 24. When the thrust member 6 is installed in the groove 21, the thrust member 6 can effectively limit the axial movement of the inner ring 61.

[0074] In some embodiments, the height of the first protrusion 17 is greater than the height of the portion of the thrust member 6 extending out of the groove 21, and a second channel 19 is formed between the first protrusion 17 and the inner wall 14, and between the first protrusion 17 and the thrust member 6. A plurality of first channels 16 are provided on the first protrusion 17, and two second channels 19 are connected through the first channel 16, and the second channel 19 is connected to the oil return assembly 12. In this technical solution, a second channel 19 is formed between the first protrusion 17 and the inner side wall 14, and between the first protrusion 17 and the thrust member 6. A plurality of first channels 16 are provided on the first protrusion 17. Two second channels 19 are connected through the first channel 16. The second channel 19 is connected to the oil return assembly 12. The second channel 19 is an annular circumferential channel, and the first channel 16 is a radial channel. Preferably, a groove can be provided on the first protrusion 17 along the radial direction of the bracket 11 to form the first channel 16. The second channels 19 inside and outside the first protrusion 17 are connected through the first channel 16, so that the lubricating oil after passing through the upper bearing 10 will all flow into the oil return assembly 12, thereby smoothly guiding it to the compressor oil storage tank.

[0075] Combined participation Figures 8 to 14 As shown, the compressor thrust structure of the second embodiment differs from that of the first embodiment in that the support member 20 is designed independently from the bracket, and the second channel 19, the first channel 16, and the thrust member 6 are disposed on the support member 20. The thrust member 6 is still interference-fitted into the thrust portion accommodating groove 21, and then is loosely fitted with the support member 20 and placed on the first bottom surface 24 of the bottom of the bearing chamber 5 of the bracket 53, wherein the second bottom surface 22 of the back of the support portion abuts and cooperates with the first bottom surface 24 of the bearing chamber bottom.

[0076] After assembling the thrust return oil structure, assemble the upper bearing 10. Use the interference fit of the upper bearing 10 to press it into the bearing chamber, and at the same time, abut the lower end surface of the upper bearing 10 against the first protrusion 17 of the support member 20, thereby pressing and limiting the support member 20 to be fixed on the first bottom surface 24 of the bearing chamber bottom.

[0077] After the upper bearing 6 and the shaft system are assembled, the shaft system inside the housing 5 may be affected by irresistible impact, electromagnetic force or gravity and other forces. The shaft system has two movement and thrust states. When the shaft system moves upward, it is limited and thrusted by the inner ring of the bearing and the roller. When the shaft system moves downward, it is limited and thrusted by the inner ring of the bearing and the thrust piece 6. At the same time, the movement safety distance H needs to be controlled. Generally, the height H is controlled within less than 1 to 1.5 mm.

[0078] Other structures and lubricating oil flow paths are the same as the compressor thrust structure of the first embodiment.

[0079] In the compressor thrust structure of the second embodiment, after the cylinder 1 and bracket 11 are integrally formed into the casing, the machining quality of the bearing chamber and the first bottom surface 24 of the bearing chamber is greatly improved. This is mainly because after the first bottom surface 24 of the bearing chamber becomes a simple large plane, the bearing chamber and the first bottom surface 24 of the bearing chamber can be machined and formed in one process using a relatively large tool, without the need for tool change, and the tool rigidity is improved. This solves the problem that when the cylinder end face is far from the thrust member 6 end face, the machining of the small bottom oil groove requires the replacement of a slender small tool, which affects the machining quality of the bearing hole and the bottom plane, resulting in unqualified parts and scrapping. In this way, the structural features of the groove 21 and the first channel 16 and the second channel 19 can be machined independently of the casing, making them easier to control. Moreover, the bottom structure of the bearing chamber under the cylinder 1 and bracket 11 is simple, and the oil-free small-sized oil passage structure can be completed with the same large tool without changing, thus ensuring the casing machining quality and improving the machining pass rate.

[0080] The compressor thrust structure of the present invention can be used on a compressor to effectively solve the problem of shaft system movement, and smoothly guide the lubricating oil after passing through the bearing to the compressor oil storage tank, thereby improving bearing lubrication and heat dissipation. At the same time, it provides a high connection stiffness of the integrated bracket and the casing, thereby improving the influence of vibration and impact on the running parts, thereby improving the reliability of the compressor.

[0081] In some embodiments, the first protrusion 17 is socketed with the inner side wall 14, and the height of the first protrusion 17 is greater than the height of the portion of the thrust member 6 extending out of the groove 21. A third channel 30 is formed between the first protrusion 17 and the thrust member 6. The support member 20 has a second bottom surface 22 facing away from the first protrusion 17. A second protrusion 23 is provided on the second bottom surface 22. The second protrusion 23 is annular. The second protrusion 23 and the inner side wall 14 form a second channel 19. A plurality of first channels 16 are provided on the second protrusion 23. The support member 20 is provided with a plurality of through holes 25, and the through holes 25 correspond one-to-one to the first channels 16. The third channel 30 is connected to the first channel 16 through the through holes 25, the first channel 16 is connected to the second channel 19, and the second channel 19 is connected to the oil return assembly 12. In this technical solution, a third channel 30 is formed between the first protrusion 17 and the thrust member 6, that is, the support member 20 has a second bottom surface 22 facing away from the first protrusion 17, and a second protrusion 23 is provided on the second bottom surface 22. The second protrusion 23 is annular, and the second protrusion 23 and the inner side wall 14 form a second channel 19. A plurality of first channels 16 are provided on the second protrusion 23, and a plurality of through holes 25 are provided on the support member 20. The through holes 25 correspond one-to-one to the first channels 16. The third channel 30 is connected to the first channel 16 through the through holes 25, the first channel 16 is connected to the second channel 19, and the second channel 19 is connected to the oil return assembly 12. Preferably, the inner wall surface of the second protrusion 23 is flush with the inner wall surface of the crankshaft hole of the bracket 11 or is the same circumferential surface, the second channel 19 is an annular circumferential channel, and the first channel 16 is a radial channel. At this time, the compressor returns oil through the bottom of the support member 20. Preferably, a groove can be provided on the second protrusion 23 along the radial direction of the bracket 11 to form a first channel 16. The second protrusion 23 and the second channel 19 are connected through the first channel 16, so that the lubricating oil after passing through the upper bearing 10 will all flow into the third channel 30 and then flow into the oil return assembly 12 through the through hole 25, the first channel 16 and the second channel 19, thereby smoothly guiding it to the compressor oil storage tank.

[0082] See also Figures 15 to 20 As shown, in the compressor thrust structure of the third embodiment, the support member 20 is designed to be independent of the bracket. Unlike the compressor thrust structure of the second embodiment, the first channel 16 and the second channel 19 are arranged on the second bottom surface 22 on the back of the support member 20, and the first protrusion 17 and the third channel 30 are arranged on the other side opposite to the second bottom surface 22 on the back of the support member 20. At the same time, the through hole 25 axially penetrates and connects the third channel 30 and the first channel 16.

[0083] The second bottom surface 22 of the support member 20 is still in contact with the first bottom surface 24 of the bearing chamber and assembled. After the lubricating oil enters the bearing chamber, it flows along the third channel 30 → through hole 25 → first channel 16 → 53 second channel 19, and then enters the oil return assembly 12 and returns to the oil pool at the bottom of the compressor.

[0084] Other aspects are the same as those of the compressor thrust structure of the second embodiment.

[0085] In some embodiments, the bracket 11 is provided with a crankshaft hole, in which the crankshaft 5 is positioned. The second protrusion 23 is provided with a third protrusion 26, which, after passing through the crankshaft hole, faces the shoulder of the crankshaft 5. In this technical solution, when the shafting moves upward, the second protrusion 23 contacts the shoulder of the crankshaft 5 to limit thrust; when the shafting moves downward, the bearing inner ring 61 contacts the thrust member 6 to limit thrust.

[0086] See also Figures 21 to 26 As shown, the support member 20 is designed to be independent from the bracket. Unlike the compressor thrust structure of the second embodiment, the thrust member 6 and support member 20 are integrally formed, and the second bottom surface 22 of the support portion has a third protrusion 26. The third protrusion 26 is primarily used to stop the shaft from moving upward. Peek engineering plastic or other wear-resistant materials can be used as the material for the integrally formed thrust structure.

[0087] After the thrust structure of the present invention is assembled on the casing, the third protrusion 26 protrudes from the lower end surface of the bearing seat body of the bracket 11. The thrust structure of the compressor of the present invention can solve the problem of the shaft system being limited by the upper bearing 6 being supported by a cylindrical rolling bearing with separated inner and outer rings.

[0088] There are two thrust-stopping states for the shaft system. When the shaft system moves upward, the third protrusion 26 of the integrated thrust and oil return structure contacts the shoulder of the crankshaft 5 to limit the thrust; when the shaft system moves downward, the inner ring of the bearing contacts the thrust piece 6 to limit the thrust. At the same time, the safe distance H of the movement needs to be controlled. Generally, the height H is controlled within less than 1 to 1.5 mm.

[0089] The compressor thrust structure of the present invention mainly arranges a thrust return oil structure consisting of an axial thrust member 6 of the shaft system and an oil channel in the bearing chamber supporting the shaft system at the bracket 11 in the compressor, and arranges an oil supply channel and an oil return channel to form a complete oil supply and return oil circulation channel for the compressor bearing.

[0090] The compressor thrust structure of the present invention can realize the upper and lower thrust limits of the shaft system, and ensure reliable oil supply and lubrication of the bearings and smooth oil return, while further improving the difficulties in parts processing quality control and the reliability risk problems of the existing technology.

[0091] The present invention also provides a compressor, comprising the above-mentioned compressor thrust structure.

[0092] The compressor of the present invention includes a cylinder 1, an upper cover 3 is provided at one end of the cylinder 1, a lower cover 2 is provided at the other end of the cylinder 1, a bracket 11 is located in the cylinder 1, a crankshaft 5 is sleeved on the bracket 11, the bracket 11 has an end 15, a pump body assembly 9 is provided on the end 15, the pump body assembly 9 includes a moving plate and a stationary plate, wherein the moving plate is connected to the bracket 11, a moving plate bearing 8 is provided between the moving plate and the bracket 11, a first channel 13 is provided on the moving plate, the first channel 13 is connected to the inner cavity of the bracket 11, an oil guide hole 7 is provided on the crankshaft 5, the lower cover 2 has an oil pool, and an oil guide 4 is provided at the end of the crankshaft 5 facing away from the moving plate, and the oil guide 4 extends into the oil pool.

[0093] See also Figure 1 As shown, the compressor, driven by a motor, rotates the crankshaft 5, causing the drive plate and the stator plate to mesh with each other, forming a crescent-shaped compression chamber. This continuously involves suction, compression, and exhaust, with the compressed refrigerant gas being discharged into the system through the exhaust port of the upper cover 3. Simultaneously, an oil guide 4 is mounted at the lower end of the crankshaft 5. As the crankshaft 5 rotates, this guide 4 continuously draws and guides oil, which is then transported from the bottom of the compressor to the upper rotor plate bearing 8 through oil holes 7 on the crankshaft for lubrication. The lubricating oil passing through the movable plate bearing 8 passes through the first channel 13 of the movable plate and the oil channel of the static plate and intermittently enters the suction chamber of the pump body. The pump body absorbs air while intermittently connecting the first channel 13 to intermittently absorb oil and lubricate the vortex teeth, thereby reducing the contact friction and wear between the vortex teeth. The lubricating oil passing through the movable plate bearing 8 passes through the rolling gap of the upper bearing of the movable plate bearing 8 and enters the upper bearing chamber set on the bracket 11, and lubricates the upper bearing 10 and takes away most of the heat generated by the operation of the bearings. Then, it passes through the return oil channels such as the first channel 16 and the second channel 19 set at the bottom of the bearing chamber, and then enters the oil return assembly 12 and returns to the oil storage tank at the bottom of the compressor. In this way, the lubricating oil circulates back and forth to achieve lubrication and heat dissipation of each bearing and the end face of the pump body, thereby ensuring reliable lubrication operation of the compressor.

[0094] The compressor casing of the present invention is composed of a barrel portion 1 and a bracket 11, wherein the barrel portion 1 and the bracket 11 are an integrally connected structure to improve the connection rigidity between the bracket and the casing and to improve the effects of vibration and impact on the operation of the compressor. The lower portion of the barrel 1 is mainly used to accommodate the motor, and the upper portion is mainly used to accommodate the bracket portion 11 and the moving plate and the static plate; the end portion 15 provided in the upper portion of the bracket 11 is used to support the moving plate, and the bearing chamber is used to accommodate the upper bearing 6. A thrust member 6 is provided at the bottom of the bearing chamber to limit the shaft system to prevent it from moving up and down and from interfering with and colliding with other internal parts. At the same time, due to the influence of the assembly and part processing dimension chain, the shaft system needs to be set to ensure a certain movement safety distance H, and the height H is generally controlled to be less than 1 to 1.5 mm.

[0095] In some embodiments, the compressor includes a cylinder 1 , and the bracket 11 is located inside the cylinder 1 ; the bracket 11 and the cylinder 1 are of an integrated structure, or the bracket 11 is sleeved inside the cylinder 1 .

[0096] The compressor thrust structure of the present invention can be used for a split structure of the bracket 11 and the cylinder 1, and can also be used for a separate structure of the bracket 11 and the cylinder 1. Figure 27 and Figure 28 shown.

[0097] In some embodiments, a sixth channel 27 is provided on the cylinder 1 in the axial direction thereof, and the sixth channel 27 is connected to the outlet of the oil return assembly 12. A fourth channel 28 is provided on the cylinder 1 in the radial direction thereof, and the sixth channel 27 is connected to the oil pool of the compressor through the fourth channel 28. In this technical solution, in combination with reference to Figure 29 As shown, a flow channel, namely, a sixth channel 27 and the fourth channel 28, can be provided in the cylinder 1, through which the lubricating oil in the lubricating oil bearing chamber is drained back to the bottom of the compressor oil pool.

[0098] In some embodiments, the bracket 11 is provided with a fifth channel 29, the inlet of the fifth channel 29 is connected to the oil return port 18, the oil return assembly 12 is located outside the cylinder 1, one end of the oil return assembly 12 passes through the cylinder 1 and is connected to the outlet of the fifth channel 29, and the other end of the oil return assembly 12 passes through the cylinder 1 and is connected to the oil pool of the compressor. In this technical solution, in combination with reference to Figure 30 As shown, the oil return assembly 12 is an external pipeline, which can use a common connecting pipe to drain the lubricating oil in the lubricating oil bearing chamber back to the bottom of the compressor oil pool through the external pipeline.

[0099] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A compressor thrust structure, characterized in that: include: A bracket (11) and an upper bearing (10), wherein the upper bearing (10) comprises an inner ring (61) and an outer ring (62), wherein the outer ring (62) is sleeved with an inner side wall (14) of the bracket (11), wherein the bracket (11) has a first bottom surface (24), wherein a thrust piece (6) is disposed on the first bottom surface (24), wherein the thrust piece (6) is arranged opposite to the inner ring (61), and wherein an oil return port (18) is disposed on the inner side wall (14), wherein the oil return port (18) is connected to an oil return assembly (12).

2. The compressor thrust structure according to claim 1, characterized in that: A first protrusion (17) is provided on the first bottom surface (24), and the first protrusion (17) abuts against the outer ring (62).

3. The compressor thrust structure according to claim 2, characterized in that: The first protrusion (17) is annular in shape, and a groove (21) is provided on the first bottom surface (24). The groove (21) is located inside the first protrusion (17), and the thrust member (6) is arranged in the groove (21), and the thickness of the thrust member (6) is greater than the depth of the groove (21).

4. The compressor thrust structure according to claim 3, characterized in that: The height of the first protrusion (17) is greater than the height of the portion of the thrust member (6) extending out of the groove (21); a second channel (19) is formed between the first protrusion (17) and the inner wall (14), and between the first protrusion (17) and the thrust member (6); a plurality of first channels (16) are provided on the first protrusion (17); two second channels (19) are connected to each other through the first channel (16); and the second channel (19) is connected to the oil return assembly (12).

5. The compressor thrust structure according to claim 1, characterized in that: A support member (20) is provided on the first bottom surface (24), a first protrusion (17) is provided on the support member (20), and the first protrusion (17) is in contact with the outer ring (62).

6. The compressor thrust structure according to claim 5, characterized in that: The first protrusion (17) is annular in shape, a groove (21) is provided on the support member (20), the groove (21) is located inside the first protrusion (17), the thrust member (6) is arranged in the groove (21), and the thickness of the thrust member (6) is greater than the depth of the groove (21).

7. The compressor thrust structure according to claim 6, characterized in that: The height of the first protrusion (17) is greater than the height of the portion of the thrust member (6) extending out of the groove (21); a second channel (19) is formed between the first protrusion (17) and the inner wall (14), and between the first protrusion (17) and the thrust member (6); a plurality of first channels (16) are provided on the first protrusion (17); two second channels (19) are connected to each other through the first channel (16); and the second channel (19) is connected to the oil return assembly (12).

8. The compressor thrust structure according to claim 6, characterized in that: The first protrusion (17) is sleeved with the inner side wall (14); the height of the first protrusion (17) is greater than the height of the portion of the thrust member (6) extending out of the groove (21); a third channel (30) is formed between the first protrusion (17) and the thrust member (6); the support member (20) has a second bottom surface (22) facing away from the first protrusion (17); a second protrusion (23) is arranged on the second bottom surface (22); the second protrusion (23) is annular; the second protrusion (23) is in contact with the first protrusion (17); The inner side wall (14) forms a second channel (19), the second protrusion (23) is provided with a plurality of first channels (16), the support member (20) is provided with a plurality of through holes (25), the through holes (25) correspond one to one with the first channels (16), the third channel (30) is connected to the first channel (16) through the through holes (25), the first channel (16) is connected to the second channel (19), and the second channel (19) is connected to the oil return assembly (12).

9. The compressor thrust structure according to claim 8, characterized in that: The bracket (11) is provided with a crankshaft hole, a crankshaft (5) is arranged in the crankshaft hole, a third protrusion (26) is arranged on the second protrusion (23), and the third protrusion (26) is opposite to the shoulder of the crankshaft (5) after passing through the crankshaft hole.

10. A compressor, characterized in that: The compressor thrust structure comprises the compressor thrust structure according to any one of claims 1 to 9.

11. The compressor according to claim 10, characterized in that: The compressor comprises a cylinder (1), and the bracket (11) is located inside the cylinder (1); the bracket (11) and the cylinder (1) adopt an integrated structure, or the bracket (11) is sleeved inside the cylinder (1).

12. The compressor according to claim 11, characterized in that: A sixth channel (27) is provided on the cylinder (1) along the axial direction of the cylinder (1), and the sixth channel (27) is connected to the outlet of the oil return assembly (12). A fourth channel (28) is provided on the cylinder (1) along the radial direction of the cylinder (1), and the sixth channel (27) is connected to the oil pool of the compressor through the fourth channel (28).

13. The compressor according to claim 11, characterized in that: The bracket (11) is provided with a fifth channel (29), the inlet of the fifth channel (29) is connected to the oil return port (18), the oil return assembly (12) is located outside the cylinder (1), one end of the oil return assembly (12) passes through the cylinder (1) and is connected to the outlet of the fifth channel (29), and the other end of the oil return assembly (12) passes through the cylinder (1) and is connected to the oil pool of the compressor.

Images