Compressor

Abstract

The compressor comprises a crankshaft and an auxiliary bearing, the crankshaft is provided with an auxiliary shaft section, and the end face of the auxiliary shaft section is provided with a first thrust face. The auxiliary bearing is provided with a matching hole used for installing the auxiliary shaft section. The inner bottom face of the matching hole is provided with a second anti-thrust face, and the second anti-thrust face abuts against the first anti-thrust face. An oil storage cavity is formed between the end face of the auxiliary shaft section and the inner bottom face of the matching hole. According to the compressor, the crankshaft end face thrust structure is adopted, and effective lubrication between the crankshaft and the auxiliary bearing can be achieved through the oil storage cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly relates to a compressor. Background Art

[0002] A rotary compressor generally includes a compression mechanism and a motor disposed in a housing. The compression mechanism includes a cylinder, a main bearing, a sub-bearing, a muffler, etc. The main bearing and the sub-bearing are respectively disposed on both sides of the cylinder. The bearing closer to the motor side is defined as the main bearing, and the bearing away from the motor side is defined as the sub-bearing. The crankshaft includes a main shaft section, an eccentric portion, and a sub-shaft section. The section closer to the motor side is defined as the main shaft section. The crankshaft axially penetrates through the sub-bearing, the cylinder, and the main bearing, and the rotor drives the crankshaft to rotate.

[0003] In related technologies, the end face of the sub-bearing close to the cylinder is usually used to abut against the crankshaft to facilitate the stable rotation of the crankshaft in the compressor. Due to the existence of the eccentric portion of the crankshaft, when the crankshaft rotates, the center of gravity of the moving parts is not on the rotation axis, so a rotational inertia force pointing in the eccentric direction is generated. The eccentric inertia force will increase the vibration and noise of the compressor during operation, affecting the reliability of the refrigeration system and the user's comfort. Summary of the Invention

[0004] An object of the present invention is to provide a compressor, which adopts a crankshaft end face thrust structure and can utilize an oil storage cavity to achieve effective lubrication between the crankshaft and the sub-bearing.

[0005] The compressor according to an embodiment of the present invention includes: a crankshaft and a sub-bearing. The crankshaft has a sub-shaft section, and a first thrust surface is provided on the end face of the sub-shaft section. The sub-bearing has a mating hole for installing the sub-shaft section. A second thrust surface is provided on the inner bottom surface of the mating hole, and the second thrust surface abuts against the first thrust surface. Wherein, an oil storage cavity is provided between the end face of the sub-shaft section and the inner bottom surface of the mating hole.

[0006] The compressor according to an embodiment of the present invention adopts a crankshaft end face thrust structure and can utilize an oil storage cavity to achieve effective lubrication between the crankshaft and the sub-bearing.

[0007] In addition, the compressor according to the above embodiment of the present invention may further have the following additional technical features:

[0008] In some embodiments, the oil storage cavity is formed between the first thrust surface, the second thrust surface, and the inner wall surface of the mating hole.

[0009] In some embodiments, the diameter dimension D1 of the first thrust surface, the diameter dimension D2 of the central hole of the sub-shaft section, and the outer diameter dimension D3 of the sub-shaft section satisfy: D2 < D1 < D3.

[0010] In some embodiments, the secondary shaft section includes a shaft portion and a ball. The shaft portion has a central hole. The ball includes a cylindrical portion and a spherical portion. The cylindrical portion passes through the central hole. The spherical portion is connected to the cylindrical portion, and at least a part of the spherical portion faces the end surface of the shaft portion along the central axis of the crankshaft. The first thrust surface is provided on the side of the spherical portion facing away from the cylindrical portion.

[0011] In some embodiments, the first thrust surface is an arc surface that protrudes outward in the middle relative to the periphery of the end surface of the secondary shaft section, and the second thrust surface is an arc surface that protrudes outward in the middle relative to the periphery of the inner bottom surface of the mating hole.

[0012] In some embodiments, the periphery of the end surface of the secondary shaft section and the periphery of the inner bottom surface of the mating hole are spaced apart along the central axis of the crankshaft.

[0013] In some embodiments, in the projection plane perpendicular to the central axis of the crankshaft, the periphery of the first thrust surface extends beyond the periphery of the second thrust surface.

[0014] In some embodiments, in the direction radially outward along the mating hole, the gap between the second thrust surface and the first thrust surface gradually increases.

[0015] In some embodiments, the crankshaft has a central oil hole and a fuel supply hole. The central oil hole is provided along the central axis of the crankshaft. The fuel supply hole is provided on the side wall of the crankshaft and communicates with the central oil hole. A spiral oil groove is provided on the inner wall surface of the mating hole. The spiral oil groove has a first end and a second end. The first end of the spiral oil groove is away from the second thrust surface and has an overlapping area along the radial direction of the mating hole with the rotation trajectory of the fuel supply hole. The second end of the spiral oil groove is close to the second thrust surface and communicates with the oil storage cavity.

[0016] In some embodiments, the first thrust surface is a rotating surface centered on the central axis of the crankshaft and with a generatrix being a first circular arc line, and the second thrust surface is a rotating surface centered on the central axis of the crankshaft and with a generatrix being a second circular arc line. Among them, the radius dimension R1 of the first circular arc line and the radius dimension R2 of the second circular arc line satisfy: R1 ≤ R2.

[0017] In some embodiments, the auxiliary bearing is provided with an oil passage, and the oil passage communicates the oil storage cavity and the outer space of the auxiliary bearing.

[0018] In some embodiments, the oil passage is provided on the bottom wall of the mating hole.

[0019] In some embodiments, the auxiliary bearing includes a bearing body and a thrust seat. The mating hole is provided in the bearing body. The thrust seat is connected to the bearing body. The second thrust surface is provided on the thrust seat and faces the mating hole. The oil passage is provided at an edge position of the thrust seat.

[0020] In some embodiments, the distance L1 from the edge of the second thrust surface to the central axis of the crankshaft and the minimum distance L2 from the oil passage to the central axis of the crankshaft satisfy: L1 < L2.

[0021] In some embodiments, the inner bottom surface of the mating hole has a planar region. The second thrust surface is provided inside the planar region and is an arc surface that protrudes outward in the middle relative to the planar region. The oil passage is provided in the planar region.

[0022] In some embodiments, the oil passage is provided on the side wall of the mating hole.

[0023] In some embodiments, the oil passage extends along the radial direction of the auxiliary bearing and penetrates through the outer wall surface of the auxiliary bearing.

[0024] In some embodiments, the shape of the oil passage is one or a combination of a circle, a square, an ellipse, and a kidney shape.

[0025] In some embodiments, a spiral oil groove is provided on the inner wall surface of the mating hole. The spiral oil groove has a first end and a second end. The second end of the spiral oil groove is close to the second thrust surface and communicates with the oil storage cavity. The second end of the spiral oil groove is staggeredly distributed from the oil passage. Description of the Drawings

[0026] Figure 1 is a cross-sectional view of a partial structure of a compressor according to an embodiment of the present invention.

[0027] Figure 2 is a cross-sectional view of a partial structure of a compressor according to an embodiment of the present invention.

[0028] Figure 3 is a cross-sectional view of the cooperation between a crankshaft and an auxiliary bearing according to an embodiment of the present invention.

[0029] Figure 4 is a cross-sectional view of a partial structure of a crankshaft according to an embodiment of the present invention.

[0030] Figure 5 is a cross-sectional view of a ball according to an embodiment of the present invention.

[0031] Figure 6 is a schematic diagram of a thrust seat according to an embodiment of the present invention.

[0032] Figure 7It is a cross-sectional view of a thrust seat according to an embodiment of the present invention.

[0033] Figure 8 It is a cross-sectional view of a partial structure of a compressor according to another embodiment of the present invention.

[0034] Reference numerals:

[0035] 100, compressor; 101, oil storage cavity; 10, crankshaft; 10A, central axis; 11, main shaft section; 12, auxiliary shaft section; 1201, central oil hole; 1202, first thrust surface; 1203, first oil hole; 1205, oil supply hole; 121, shaft portion; 122, ball; 1221, cylindrical portion; 1222, spherical portion; 13, eccentric portion; 20, auxiliary bearing; 201, mating hole; 202, second thrust surface; 203, second oil hole; 204, spiral oil groove; 206, oil passage; 21, bearing body; 22, thrust seat; 30, main bearing. Detailed description of the specific implementation

[0036] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] As Figures 1 to 3 , the compressor 100 according to an embodiment of the present invention includes: a crankshaft 10 and an auxiliary bearing 20. The crankshaft 10 has an auxiliary shaft section 12, and a first thrust surface 1202 is provided on the end surface of the auxiliary shaft section 12. The auxiliary bearing 20 has a mating hole 201 for installing the auxiliary shaft section 12. A second thrust surface 202 is provided on the inner bottom surface of the mating hole 201, and the second thrust surface 202 abuts against the first thrust surface 1202. Among them, Figure 3The crankshaft 10 and the auxiliary bearing 20 are separated in [description] to facilitate the display of the first thrust surface 1202 and the second thrust surface 202. The thrust function can be achieved by the cooperation of the first thrust surface 1202 provided at the end face of the auxiliary shaft section 12 and the second thrust surface 202 of the auxiliary bearing 20, that is, thrust is applied at the end of the crankshaft 10. In this way, there is no need to provide a thrust structure at the end face of the eccentric part 13, or the thrust area of the thrust structure provided at the end face of the eccentric part 13 can be designed to be very small. In addition, the thrust area is not affected by whether the auxiliary bearing 20 has an annular groove, so the thrust surface can be further reduced, which can relieve or reduce the influence of the thrust surface structure of the crankshaft 10 on the size of the weight-reducing balance hole. As a result, the weight-reducing balance hole provided on the eccentric part 13 of the crankshaft 10 can be made correspondingly larger, so that the eccentric mass of the crankshaft 10 can be minimized while keeping the eccentricity of the crankshaft 10 unchanged. This is beneficial to reducing the weight of the balance block in the compressor 100, and further reducing the vibration and noise during the operation of the compressor 100 while reducing the material cost of the balance block, improving the energy efficiency of the compressor 100, reducing the eccentric wear between the crankshaft 10 and the bearing, and realizing the low cost, high energy efficiency and high reliability of the compressor 100.

[0038] In addition, an oil storage cavity 101 is provided between the end face of the auxiliary shaft section 12 and the inner bottom surface of the mating hole 201. The oil storage cavity 101 can be used to store lubricating oil, and the lubricating oil in the oil storage cavity 101 can enter between the first thrust surface 1202 and the second thrust surface 202 to provide lubrication during the relative rotation of the first thrust surface 1202 and the second thrust surface 202, so as to facilitate the stable relative rotation of the crankshaft 10 and the auxiliary bearing 20.

[0039] The compressor 100 according to the embodiment of the present invention adopts a thrust structure at the end face of the crankshaft 10 and can achieve effective lubrication between the crankshaft 10 and the auxiliary bearing 20 by using the oil storage cavity 101.

[0040] In some embodiments of the present invention, a first oil hole 1203 is provided on the first thrust surface 1202, a second oil hole 203 is provided on the second thrust surface 202, a central oil hole 1201 is provided inside the crankshaft 10, a fuel supply hole 1205 is provided on the side wall of the crankshaft 10, and an oil passage 206 is provided in the auxiliary bearing 20. During the operation of the compressor 100, lubricating oil can enter the central oil hole 1201 through the first oil hole 1203 and the second oil hole 203, and then enter between the auxiliary shaft section 12 and the auxiliary bearing 20 through the fuel supply hole 1205, and then enter the oil storage cavity 101. A part of the lubricating oil introduced into the oil storage cavity 101 enters between the first thrust surface 1202 and the second thrust surface 202 to achieve lubrication between the first thrust surface 1202 and the second thrust surface 202; another part of the oil storage cavity 101 can be discharged through the oil passage 206 to realize the circulation of the lubricating oil, thereby improving the lubrication effect of the lubricating oil and using the lubricating oil to dissipate heat from the components of the compressor 100. The above description is only for the convenience of understanding the present invention and is not a limitation on the protection scope of the present invention. For example, the first oil hole 1203 may not be provided on the first thrust surface 1202, and the second oil hole 203 may not be provided on the second thrust surface 202.

[0041] Combined with Figures 1 to 3 , in some embodiments, the oil storage cavity 101 is formed between the inner wall surfaces of the first thrust surface 1202, the second thrust surface 202, and the mating hole 201. Optionally, as Figure 4 and Figure 5 , the diameter dimension D1 of the first thrust surface 1202, the diameter dimension D2 of the central hole of the auxiliary shaft section 12, and the outer diameter dimension D3 of the auxiliary shaft section 12 satisfy: D2 < D1 < D3. It is convenient for the lubricating oil in the oil storage cavity 101 to enter between the first thrust surface 1202 and the second thrust surface 202, and improve the lubrication effect between the first thrust surface 1202 and the second thrust surface 202.

[0042] As Figures 3 to 5 , in some embodiments, the auxiliary shaft section 12 includes a shaft part 121 and a ball 122. The ball 122 is connected to the end of the shaft part 121, and the first thrust surface 1202 is provided on the ball 122. It can simplify the production process of the crankshaft 10, improve the production efficiency of the auxiliary shaft section 12, and in addition, can also reduce the processing cost of the crankshaft 10.

[0043] Combined with Figures 3 to 5, the ball 122 includes a cylindrical portion 1221 and a spherical portion 1222. The shaft portion 121 may have a central hole, the cylindrical portion 1221 may pass through the central hole, the spherical portion 1222 is connected to the cylindrical portion 1221, and at least a part of the spherical portion 1222 is along the central axis 10A of the crankshaft 10 and the end face of the shaft portion 121. The first thrust surface 1202 is provided on the side of the spherical portion 1222 facing away from the shaft portion 121. The stable connection between the ball 122 and the shaft portion 121 can be realized by the cooperation between the cylindrical portion 1221 and the central hole, improving the connection efficiency and stability between the ball 122 and the shaft portion 121. The stable connection between the ball 122 and the shaft portion 121 can be realized by using the cylindrical portion 1221, which facilitates the cooperation between the spherical portion 1222 and the second thrust surface 202, and forms an oil storage cavity 101 between the end face of the auxiliary shaft section 12 and the inner bottom surface of the mating hole 201.

[0044] As Figure 2 and Figure 3 , in some embodiments, the first thrust surface 1202 is an arc surface convex in the middle with respect to the periphery of the end face of the auxiliary shaft section 12, and the second thrust surface 202 is an arc surface convex in the middle with respect to the periphery of the inner bottom surface of the mating hole 201. The cooperation stability between the crankshaft 10 and the auxiliary bearing 20 can be further improved. In addition, the second thrust surface 202 is set to be an arc shape adapted to the first thrust surface 1202. Among them, the radian of the second thrust surface 202 may be different from or the same as the radian of the first thrust surface 1202. For example, the first thrust surface 1202 is set as an arc surface convex in the middle, and the second thrust surface 202 may also be set as an arc surface convex in the middle. Of course, the second thrust surface 202 may also be set as a plane.

[0045] Optionally, in some embodiments, the first thrust surface 1202 is set as a revolving surface centered on the axis of the crankshaft 10, and at least a part of the generatrix of the revolving surface forms an angle less than 90° with the axis. The first thrust surface 1202 cooperates with the second thrust surface 202. During the rotation of the auxiliary shaft section 12 relative to the auxiliary bearing 20, the revolving surface can facilitate the centering of the crankshaft 10 and improve the cooperation stability between the first thrust surface 1202 and the second thrust surface 202. Among them, the generatrix of the revolving surface may be a straight line segment, an arc segment, or a combination of a straight line segment and an arc segment, etc.

[0046] Optionally, as Figure 2, the peripheries of the end faces of the auxiliary shaft section 12 and the inner bottom face of the mating hole 201 are distributed at intervals along the central axis 10A of the crankshaft 10. An oil storage cavity 101 can be formed between the peripheries of the end faces of the auxiliary shaft section 12 and the inner bottom face of the mating hole 201, facilitating the storage of lubricating oil in the oil storage cavity 101. In addition, in the projection plane perpendicular to the central axis 10A of the crankshaft 10, the periphery of the first thrust face 1202 extends beyond the periphery of the second thrust face 202. Optionally, in the direction radially outward along the mating hole 201, the gap between the second thrust face 202 and the first thrust face 1202 can gradually increase. This can facilitate the oil in the oil storage cavity 101 to enter between the first thrust face 1202 and the second thrust face 202, improving the lubrication effect on the end face thrust structure between the crankshaft 10 and the auxiliary bearing 20. Combined with Figure 2 , Figure 5 and Figure 7 , the diameter dimension D1 of the first thrust face and the diameter dimension D4 of the second thrust face satisfy: D1 > D4.

[0047] In some embodiments, such as Figure 2 , the crankshaft 10 has a central oil hole 1201 and a supply oil hole 1205. The central oil hole 1201 is arranged along the central axis 10A of the crankshaft 10, and the supply oil hole 1205 is provided on the side wall of the crankshaft 10 and communicates with the central oil hole 1201. A spiral oil groove 204 is provided on the inner wall surface of the mating hole 201. The spiral oil groove 204 has a first end and a second end. The first end of the spiral oil groove 204 is far from the second thrust face 202 and has an overlapping area with the rotation trajectory of the supply oil hole 1205 along the radial direction of the mating hole 201, so as to facilitate the communication between the supply oil hole 1205 and the first end of the spiral oil groove 204. The second end of the spiral oil groove 204 is close to the second thrust face 202 and communicates with the oil storage cavity 101. The lubricating oil in the central oil hole 1201 can enter the supply oil hole 1205. During the rotation of the crankshaft 10, when the crankshaft 10 rotates to a specific position to make the supply oil hole 1205 communicate with the spiral oil groove 204, the oil in the central oil hole 1201 will enter the spiral oil groove 204 through the supply oil hole 1205, and then will flow along the spiral oil groove 204. Part of the oil entering the spiral oil groove 204 will enter between the crankshaft 10 and the auxiliary bearing 20 under the driving action of the rotation of the crankshaft 10, realizing the lubrication between the crankshaft 10 and the auxiliary bearing 20; another part of the oil entering the spiral oil groove 204 will flow to the oil storage cavity 101. Thus, the circulation of the lubricating oil can be facilitated.

[0048] In addition, such as Figure 2The first end of the spiral oil groove 204 can be set to pass through the side of the auxiliary bearing 20 close to the cylinder; the inner wall of the matching hole 201 close to the second thrust surface 202 can be provided with a positioning notch, and the auxiliary bearing 20 can include a bearing body 21 and a thrust seat 22, and the periphery of the thrust seat 22 can be positioned in the positioning notch. At this time, the second end of the spiral oil groove 204 can be set to pass through the positioning notch, so that the spiral oil groove 204 is connected to the oil storage chamber 101.

[0049] In addition, if Figure 2 The first thrust surface 1202 can be provided with a first oil hole 1203, and the second thrust surface 202 can be provided with a second oil hole 203, so that the lubricating oil can flow into the center oil hole 1201 through the first oil hole 1203 and the second oil hole 203. Of course, other oil holes can also be provided to supply oil to the center oil hole 1201. For example, the second oil hole 203 is provided on the outer wall surface of the auxiliary bearing 20, and the first oil hole 1203 is provided on the outer wall surface of the auxiliary shaft section 12.

[0050] In some embodiments, the first thrust surface 1202 is set as a revolution surface with the center axis 10A of the crankshaft 10 as the center and the generatrix as the first arc line, and the second thrust surface 202 is set as a revolution surface with the center axis 10A of the crankshaft 10 as the center and the generatrix as the second arc line, wherein the radius size R1 of the first arc line and the radius size R2 of the second arc line satisfy: R1≤R2. When R1=R2, the contact area of the first thrust surface 1202 and the second thrust surface 202 can be increased, thereby improving the end face thrust effect of the crankshaft 10, improving the stability and structural strength of the end face thrust of the crankshaft 10, so as to facilitate the stable rotation of the crankshaft 10 and improve the performance of the compressor 100. When R1<R2, the clearance between the first thrust surface 1202 and the second thrust surface 202 in the radial outward direction along the matching hole 201 gradually increases, which can ensure the stable thrust of the first thrust surface 1202 and the second thrust surface 202, and facilitate the oil in the oil storage cavity 101 to flow between the first thrust surface 1202 and the second thrust surface 202, thereby improving the lubrication effect.

[0051] like Figure 6 and Figure 8 In some embodiments, the auxiliary bearing 20 is provided with an oil passage 206, and the oil passage 206 communicates the oil storage chamber 101 with the outer space of the auxiliary bearing 20. The oil passage 206 can facilitate the discharge of the lubricating oil in the oil storage chamber 101, so that the oil can circulate inside and outside the auxiliary bearing 20, improve the lubrication effect on the sliding pair between the crankshaft 10 and the auxiliary bearing 20, and also use the lubricating oil to take away the heat generated by the relative rotation between the crankshaft 10 and the auxiliary bearing 20, so as to facilitate heat dissipation, thereby improving the stability of the operation of the compressor 100.

[0052] The oil channel 206 in the present invention may include but is not limited to the following configurations.

[0053] Setting method 1

[0054] Such as Figure 6 , in some embodiments, the oil passage 206 is provided on the bottom wall of the mating hole 201. The oil passage 206 may include one or at least two distributed along the central axis 10A of the crankshaft 10. This can facilitate the discharge of the oil in the oil storage cavity 101 through the oil passage 206 and improve the operating stability of the compressor 100.

[0055] Among them, the auxiliary bearing 20 includes a bearing body 21 and a thrust seat 22. The mating hole 201 is provided in the bearing body 21. The thrust seat 22 is connected to the bearing body 21. The second thrust surface 202 is provided on the thrust seat 22 and is opposite to the mating hole 201. The oil passage 206 is provided at the edge position of the thrust seat 22. It can simplify the processing technology of the auxiliary bearing 20, reduce the processing cost and time of the auxiliary bearing 20, and can optimize the end thrust effect of the auxiliary bearing 20 on the crankshaft 10. It is convenient for the thrust seat 22 to construct the second thrust surface 202, and the structure of the auxiliary bearing 20 can be simplified.

[0056] Optionally, the distance L1 from the edge of the second thrust surface 202 to the central axis 10A of the crankshaft 10 and the minimum distance L2 from the oil passage 206 to the central axis 10A of the crankshaft 10 satisfy: L1 < L2. It can maintain the effective thrust of the second thrust surface 202 on the first thrust surface 1202, avoid the lubricating oil entering between the first thrust surface 1202 and the second thrust surface 202 from escaping, so as to position the lubricating effect of the first thrust surface 1202 and the second thrust surface 202.

[0057] In addition, the inner bottom surface of the mating hole 201 has a planar region. The second thrust surface 202 is provided inside the planar region and is an arc surface convex outward in the middle relative to the planar region. The oil passage 206 can be provided in the planar region. It can improve the lubricating effect.

[0058] Optionally, the bearing body 21 and the thrust seat 22 can adopt the following assembly forms.

[0059] Example 1, the auxiliary bearing 20 includes a bearing body 21 and a thrust seat 22. The bearing body 21 has a first central hole and a second central hole. The first central hole is used to penetrate and support the auxiliary shaft section 12 of the crankshaft 10 of the compressor 100. The first central hole and the second central hole are distributed along the axis of the auxiliary bearing 20. The thrust seat 22 is connected to the bearing body 21. The thrust seat 22 has a positioning portion provided in the second central hole. The thrust seat 22 is used to abut against the end face of the auxiliary shaft section 12. Among them, the connection between the thrust seat 22 and the bearing body 21 can be realized by means of threaded fit, interference fit or snap connection, etc. Positioning members can also be provided on the peripheral wall of the second central hole to position the thrust portion, and gaskets or mufflers can also be provided to position the thrust seat 22, etc.

[0060] Example 2. The auxiliary bearing 20 includes a bearing body 21 and a thrust seat 22. The bearing body 21 has a central hole for passing through and supporting the auxiliary shaft section 12. A positioning structure is provided on the side wall of the bearing body 21, and the positioning structure is located outside the central hole. The thrust seat 22 includes a thrust portion and a positioning portion connecting the thrust portion. The thrust portion has a second thrust surface 202 corresponding to the central hole to abut against the end surface of the auxiliary shaft section 12. The positioning portion cooperates with the positioning structure for connecting the thrust seat 22 and the bearing body 21. The positioning structure is provided on the outer peripheral surface of the bearing body 21. The positioning portion is provided outside the side wall of the bearing body 21 and is connected to the positioning structure. The positioning structure includes a groove. The positioning portion includes a main body portion and a hook portion. The main body portion is provided outside the side wall of the bearing body 21. The hook portion protrudes from the inner side surface of the main body portion and is engaged with the groove in a snap-fit manner. The positioning portion can be sleeved outside the peripheral wall of the bearing body 21.

[0061] Example 3. The auxiliary bearing 20 includes a bearing body 21 and a thrust seat 22, and the bearing body 21 and the thrust seat 22 are provided as an integral structure.

[0062] Of course, other assembly methods can also be adopted for the bearing body 21 and the thrust seat 22. The above descriptions are only some implementation forms of the present invention.

[0063] Setting method 2

[0064] Such as Figure 8 , in some embodiments, the oil passage 206 is provided on the side wall of the mating hole 201. This can simplify the structure of the auxiliary bearing 20. Specifically, in combination with the foregoing embodiments, the auxiliary bearing 20 may include a bearing body 21 and a thrust seat 22. When the oil passage 206 is provided on the side wall of the mating hole 201, the mating hole 201 can be arranged on the side wall of the bearing body 21. In this way, the structure of the thrust seat 22 is relatively simple, and the structural strength and stability of the thrust seat 22 can also be improved, so as to facilitate the use of the thrust seat 22 to provide stable thrust to the crankshaft 10, thereby improving the rotational stability of the crankshaft 10 and reducing the failure rate of the compressor 100 during operation.

[0065] Among them, the oil passage 206 extends along the radial direction of the auxiliary bearing 20 and penetrates through the outer wall surface of the auxiliary bearing 20. This can facilitate the flow of oil, and it can also facilitate the machining of the oil passage 206 on the outer wall surface of the auxiliary bearing 20, simplifying the machining process of the auxiliary bearing 20.

[0066] In addition, the shape of the oil passage 206 in the foregoing embodiments is one or a combination of a circle, a square, an ellipse, and a kidney shape. For example, the cross-section of the oil passage 206 can be set to a circle, a square, an ellipse, or a kidney shape, etc.; in addition, the cross-section of the oil passage 206 can be set to include a semi-circular line and a semi-elliptical line, and the semi-circular line and the semi-elliptical line enclose a closed interval, that is to say, the oil passage 206 is composed of a combination of a circle and an ellipse; the cross-section of the oil passage 206 can also be set to include a semi-circular line and a straight line segment, and the semi-circular line and the straight line segment enclose a closed area interval, that is to say, the oil passage 206 is composed of a combination of a circle and a square. Of course, the above description is only some structural forms of the oil passage 206 in the present invention and does not limit the protection scope of the present invention.

[0067] In addition, in combination with the foregoing embodiments, a spiral oil groove 204 is provided on the inner wall surface of the mating hole 201. The spiral oil groove 204 has a first end and a second end. The second end of the spiral oil groove 204 is close to the second thrust surface 202 and communicates with the oil storage cavity 101. The second end of the spiral oil groove 204 is staggeredly distributed from the oil passage 206. In this way, it is convenient for the lubricating oil to stay in the oil storage cavity 101 for a period of time, and it is convenient for the lubricating oil to be introduced between the first thrust surface 1202 and the second thrust surface 202, improving the lubrication effect on the first thrust surface 1202 and the second thrust surface 202.

[0068] In some embodiments, the hardness HR of the first thrust surface 1202 and / or the second thrust surface 202 satisfies: HR > 50 HRC. Stable cooperation between the first thrust surface 1202 and the second thrust surface 202 can be achieved, and during the rotation of the crankshaft 10 relative to the auxiliary bearing 20, the wear of the first thrust surface 1202 and the second thrust surface 202 can be reduced.

[0069] The present invention can not only ensure the stiffness of the crankshaft 10 but also maximize the size of the weight-reducing balance holes. Of course, the above values are not limited to the above specific ranges and can be reasonably designed and adjusted according to parameters such as the size of the compressor 100. In addition, the compressor 100 can have a counterweight balance hole. The weight-reducing balance hole can be provided on the end face of the eccentric portion 13 of the crankshaft 10, and the cross-section of the weight-reducing balance hole is formed by one or more non-connected circles with the same or different radii.

[0070] On the premise of ensuring the stiffness of the eccentric portion 13 of the crankshaft 10, the weight-reducing balance hole can be composed of one or more circular holes with equal or different diameters. Preferably, the weight-reducing balance hole is composed of a plurality of circular holes with different diameters to break the structural symmetry of the eccentric portion 13, thereby better reducing the eccentric inertial force and making the structural stiffness of the eccentric portion 13 better.

[0071] Preferably, the weight-reducing balance holes are provided on the end face of the eccentric portion 13. The cross-section of the weight-reducing balance holes is crescent-shaped. The center of the first arc of the crescent shape coincides with the axis of the eccentric portion 13, and the center of the second arc of the crescent shape coincides with the central axis 10A of the main shaft section 11. On the premise of ensuring the stiffness of the eccentric portion 13 of the crankshaft 10, the size of the weight-reducing balance holes can be further increased, thereby further reducing the eccentric mass of the crankshaft 10, better reducing the eccentric inertial force, and being more conducive to reducing the weight of the balance block in the compressor 100.

[0072] The radius of the second arc of the crescent shape is equal to the radius of the secondary shaft section 12 to maximize the size of the weight-reducing balance holes, thereby maximizing the reduction of the eccentric mass of the crankshaft 10.

[0073] Preferably, the eccentric portion 13 has a second end face facing the main shaft section 11, and the weight-reducing balance holes are through holes penetrating the first end face and the second end face. The weight-reducing balance holes are designed as through holes axially penetrating the eccentric portion 13 to better reduce the eccentric mass of the crankshaft 10 along the entire axial direction, thereby better reducing the eccentric inertial force.

[0074] As Figure 1 , in addition, the compressor 100 may further include a motor, a cylinder, a piston, a main bearing 30, etc. The crankshaft 10 may further include a main shaft section 11, an eccentric portion 13, etc. Among them, the main shaft section 11 of the crankshaft 10 is rotatably passed through the main bearing 30, the secondary shaft section 12 is rotatably passed through the secondary bearing 20, and the first thrust surface 1202 of the end face of the secondary shaft section 12 is in thrust fit with the second thrust surface 202 of the secondary bearing 20. The cylinder is provided between the main bearing 30 and the secondary bearing 20. The piston is connected to the eccentric portion 13 and is disposed in the cylinder. The motor is connected to the main shaft section 11, and the motor can drive the crankshaft 10 to rotate.

[0075] The compressor 100 of the present invention can improve the thrust effect between the first thrust surface 1202 and the second thrust surface 202, realize the stable support of the secondary bearing 20 for the secondary shaft section 12, facilitate improving the stability during the rotation of the crankshaft 10, reduce the influence of the eccentric inertial force of the crankshaft 10, and improve the stability during the operation of the compressor 100.

[0076] The thermal management system according to an embodiment of the present invention includes the aforementioned compressor 100. Among them, the thermal management system may further include a condenser, an evaporator, a throttle valve, etc. The exhaust cavity of the compressor 100, the condenser, the throttle valve, the evaporator, and the suction cavity of the compressor 100 are connected into a refrigerant circuit to facilitate temperature adjustment by using the phase change of the refrigerant.

[0077] In addition, the evaporator may have a first flow channel through which a heat exchange medium can be introduced to facilitate refrigerating the heat exchange medium in the first flow channel by using the evaporator; the condenser may have a second flow channel through which a heat exchange medium can be introduced to facilitate heating the heat exchange medium in the second flow channel by using the condenser.

[0078] In addition, the present invention further provides a vehicle, which may include the aforementioned thermal management system. Among them, the thermal management system may be in heat exchange flow paths with the battery heat exchange flow path, the electronic control heat exchange flow path, the heat exchanger flow path, the air conditioner flow path, etc. in the vehicle to facilitate heat exchange of the heat exchange medium in the thermal management system and the flow paths in the vehicle.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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, and thus should not be construed as a limitation to the present invention.

[0080] 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 invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. 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 internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Further, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0083] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A compressor (100), characterized in that, Comprising: A crankshaft (10), the crankshaft (10) having a countershaft section (12), and a first thrust surface (1202) provided on an end face of the countershaft section (12); A counter bearing (20), the counter bearing (20) having a mating hole (201) for mounting the countershaft section (12); a second thrust surface (202) is provided on an inner bottom surface of the mating hole (201), and the second thrust surface (202) abuts against the first thrust surface (1202); Wherein, an oil storage cavity (101) is provided between an end face of the countershaft section (12) and an inner bottom surface of the mating hole (201).

2. The compressor (100) according to claim 1, characterized in that, The oil storage cavity (101) is formed between the first thrust surface (1202), the second thrust surface (202), and an inner wall surface of the mating hole (201).

3. The compressor (100) according to claim 1, characterized in that, The diameter dimension D1 of the first thrust surface (1202), the diameter dimension D2 of a central hole of the countershaft section (12), and the outer diameter dimension D3 of the countershaft section (12) satisfy: D2 < D1 < D3.

4. The compressor (100) according to claim 3, characterized in that, The countershaft section (12) includes a shaft portion (121) and a ball (122), the shaft portion (121) having a central hole, the ball (122) including a cylindrical portion (1221) and a spherical portion (1222), the cylindrical portion (1221) passing through the central hole, the spherical portion (1222) connecting the cylindrical portion (1221), and at least a part of the spherical portion (1222) being opposite to an end face of the shaft portion (121) along a central axis (10A) of the crankshaft (10), and the first thrust surface (1202) is provided on a side of the spherical portion (1222) facing away from the cylindrical portion (1221).

5. The compressor (100) according to claim 1, characterized in that, The first thrust surface (1202) is an arc surface convex outward in the middle with respect to a periphery of an end face of the countershaft section (12), and the second thrust surface (202) is an arc surface convex outward in the middle with respect to a periphery of an inner bottom surface of the mating hole (201).

6. The compressor (100) according to claim 1, characterized in that, The periphery of the end face of the countershaft section (12) and the periphery of the inner bottom surface of the mating hole (201) are spaced apart along the central axis (10A) of the crankshaft (10).

7. The compressor (100) according to claim 1, characterized in that, In a projection plane perpendicular to the central axis (10A) of the crankshaft (10), the periphery of the first thrust surface (1202) extends beyond the periphery of the second thrust surface (202).

8. The compressor (100) according to claim 1, characterized in that, In a direction radially outward along the mating hole (201), the gap between the second thrust surface (202) and the first thrust surface (1202) gradually increases.

9. The compressor (100) according to claim 1, characterized in that, The crankshaft (10) has a central oil hole (1201) and an oil supply hole (1205), the central oil hole (1201) is arranged along the central axis (10A) of the crankshaft (10), and the oil supply hole (1205) is provided on a side wall of the crankshaft (10) and communicates with the central oil hole (1201). The inner wall surface of the mating hole (201) is provided with a spiral oil groove (204). The spiral oil groove (204) has a first end and a second end. The first end of the spiral oil groove (204) is far from the second thrust surface (202) and has a region radially overlapping with the rotation locus of the oil supply hole (1205) along the mating hole (201); the second end of the spiral oil groove (204) is close to the second thrust surface (202) and communicates with the oil storage chamber (101).

10. The compressor (100) according to claim 1, characterized in that, The first thrust surface (1202) is provided as a rotating surface centered on the central axis (10A) of the crankshaft (10) with the busbar being a first circular arc line, and the second thrust surface (202) is provided as a rotating surface centered on the central axis (10A) of the crankshaft (10) with the busbar being a second circular arc line. Wherein, the radius dimension R1 of the first circular arc line and the radius dimension R2 of the second circular arc line satisfy: R1 ≤ R2.

11. The compressor (100) according to claim 1, characterized in that, The auxiliary bearing (20) is provided with an oil passage (206), and the oil passage (206) communicates the oil storage chamber (101) and the outer space of the auxiliary bearing (20).

12. The compressor (100) according to claim 11, wherein, The oil passage (206) is provided on the bottom wall of the mating hole (201).

13. The compressor (100) according to claim 11 or 12, characterized in that, The auxiliary bearing (20) includes a bearing body (21) and a thrust seat (22). The mating hole (201) is provided in the bearing body (21). The thrust seat (22) is connected to the bearing body (21). The second thrust surface (202) is provided on the thrust seat (22) and faces the mating hole (201). The oil passage (206) is provided at the edge position of the thrust seat (22).

14. The compressor (100) according to claim 11 or 12, characterized in that, The distance L1 from the edge of the second thrust surface (202) to the central axis (10A) of the crankshaft (10) and the minimum distance L2 from the oil passage (206) to the central axis (10A) of the crankshaft (10) satisfy: L1 < L2.

15. The compressor (100) according to claim 11 or 12, characterized in that, The inner bottom surface of the mating hole (201) has a planar region. The second thrust surface (202) is provided inside the planar region and is an arc surface convex outward in the middle relative to the planar region. The oil passage (206) is provided in the planar region.

16. The compressor (100) according to claim 11, characterized in that, The oil passage (206) is provided on the side wall of the mating hole (201).

17. The compressor (100) according to claim 11 or 16, characterized in that, The oil passage (206) extends along the radial direction of the auxiliary bearing (20) and penetrates the outer wall surface of the auxiliary bearing (20).

18. The compressor (100) according to claim 11, characterized in that, The shape of the oil passage (206) is one or a combination of a circle, a square, an ellipse, and a kidney shape; And / or, the inner wall surface of the mating hole (201) is provided with a spiral oil groove (204). The spiral oil groove (204) has a first end and a second end. The second end of the spiral oil groove (204) is close to the second thrust surface (202) and communicates with the oil storage chamber (101). The second end of the spiral oil groove (204) is staggeredly distributed from the oil passage (206).

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