Bearing, compressor and refrigeration equipment

Abstract

The utility model discloses a bearing, compressor and refrigeration equipment, and relates to the technical field of compressors, the inner wall of the bearing is provided with a plurality of first oil grooves and a plurality of second oil grooves, the plurality of first oil grooves all penetrate through one end face of the bearing, the plurality of second oil grooves all penetrate through the other end face of the bearing, and in the rotation stroke of a crankshaft, the first oil grooves are communicated with the second oil grooves. A communicating groove in a crankshaft of the compressor is provided with a first position communicating with the multiple first oil grooves and a second position communicating with the multiple second oil grooves. The first oil grooves are evenly distributed in the circumferential direction of the bearing, the second oil grooves are evenly distributed in the circumferential direction of the bearing, no matter where the crankshaft is located, lubricating oil can smoothly enter the first oil grooves and the second oil grooves at the same time, and force acting on the bearing is the same in the circumferential direction; instantaneous pressure unbalance is avoided, and therefore excitation to the bearing is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor technical field, especially a kind of bearing, compressor and refrigeration equipment. BACKGROUND

[0002] As one of the core components of air conditioning system, bearing, its working principle determines that noise will inevitably be produced in the running process, and these noises often have complex composition. Therefore, controlling the noise of bearing is crucial to improve the overall mute performance of air conditioner, and is also a key consideration in product development process.

[0003] In bearing, pump body is one of the main noise sources. Especially in those bearings that distinguish high-pressure cavity and low-pressure cavity, the communication oil groove in traditional design can cause lubricating oil to be directly sprayed from high-pressure area to low-pressure area under the action of pressure difference. This oil groove design can also cause additional excitation to crankshaft and bearing, thereby causing greater noise and vibration problems when the bearing is running. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of bearing, compressor and refrigeration equipment, to solve the problem that lubricating oil in compressor flows from high-pressure area to low-pressure area, which easily causes additional excitation to bearing.

[0005] To achieve the above-mentioned purpose, the utility model provides a bearing, the inner wall of which is provided with a plurality of oil grooves extending along the axial direction of the bearing. The plurality of oil grooves includes a plurality of first oil grooves and a plurality of second oil grooves. The plurality of first oil grooves all penetrate one end surface of the bearing, and the plurality of second oil grooves all penetrate the other end surface of the bearing. The plurality of first oil grooves and the plurality of second oil grooves are spaced apart along the circumferential direction of the bearing, so that in the rotation stroke of the crankshaft of the compressor, the communication groove on the crankshaft has a first position in communication with the plurality of first oil grooves and a second position in communication with the plurality of second oil grooves.

[0006] Among them, the plurality of first oil grooves are uniformly distributed along the circumferential direction of the bearing, and the plurality of second oil grooves are uniformly distributed along the circumferential direction of the bearing.

[0007] In an embodiment, the number of the plurality of first oil grooves is n1, and 2≤n1≤4; and / or,

[0008] The number of the plurality of second oil grooves is n2, and 2≤n2≤4.

[0009] In an embodiment, the height of the bearing is H, the length of the first oil groove in the axial direction of the bearing is h1, the length of the second oil groove in the axial direction of the bearing is h2, and 0.8H≤h1+h2≤1.5H.

[0010] In an embodiment, the oil groove is arranged in a spiral shape, a pitch of the oil groove is S, and 20mm≤S≤600mm.

[0011] In an embodiment, the oil groove is arranged in an inclined manner relative to an axial direction of the bearing, an included angle between a length direction of the oil groove and the axial direction of the bearing is arranged as A, and 5°≤A≤90°.

[0012] In an embodiment, a groove width of the oil groove is w, a groove depth of the oil groove is d1, and an inner diameter of the bearing is d2, wherein d1≤w≤d2 / 4.

[0013] In an embodiment, the first oil groove and the second oil groove are arranged in a staggered manner in a circumferential direction of the bearing at one end close to each other.

[0014] In an embodiment, an end wall of the first oil groove and the second oil groove at one end close to each other is arranged as an arc surface.

[0015] The utility model also provides a kind of compressor, and the compressor includes:

[0016] Crankshaft is rotatably arranged around its axis, the crankshaft includes eccentric part, and two shaft segments separately arranged on both sides of the eccentric part, the surface of the shaft segment is provided with communication groove;And,

[0017] Two bearings, the two bearings are respectively sleeved on the periphery of the two shaft segments, the inner wall of the bearing is provided with a plurality of oil grooves extending along the axial direction of the bearing, the plurality of oil grooves include a plurality of first oil grooves and a plurality of second oil grooves, the plurality of first oil grooves all penetrate one end surface of the bearing, the plurality of second oil grooves all penetrate the other end surface of the bearing, the plurality of first oil grooves and the plurality of second oil grooves are distributed in a spaced manner along the circumferential direction of the bearing, so that in the rotation stroke of the crankshaft of compressor, the communication groove on the crankshaft has first position communicated with the plurality of first oil grooves and second position communicated with the plurality of second oil grooves;

[0018] Among them, the plurality of first oil grooves are uniformly distributed along the circumferential direction of the bearing, and the plurality of second oil grooves are uniformly distributed along the circumferential direction of the bearing.

[0019] In an embodiment, the compressor is a rotary compressor.

[0020] The utility model also provides a kind of refrigeration equipment, and the refrigeration equipment includes compressor, and the compressor includes:

[0021] Crankshaft is rotatably arranged around its axis, the crankshaft includes eccentric part, and two shaft segments separately arranged on both sides of the eccentric part, the surface of the shaft segment is provided with communication groove;And,

[0022] Two bearings, the two bearings are sleeved on the periphery of the two shaft segments, the inner wall of the bearing is provided with a plurality of oil grooves extending along the axial direction of the bearing, the plurality of oil grooves include a plurality of first oil grooves and a plurality of second oil grooves, the plurality of first oil grooves all penetrate one end surface of the bearing, the plurality of second oil grooves all penetrate the other end surface of the bearing, the plurality of first oil grooves and the plurality of second oil grooves are spaced apart along the circumferential direction of the bearing, in the rotation stroke of the crankshaft, the communication groove has a first position in communication with the plurality of first oil grooves and a second position in communication with the plurality of second oil grooves.

[0023] Among them, the plurality of first oil grooves are uniformly distributed along the circumferential direction of the bearing, and the plurality of second oil grooves are uniformly distributed along the circumferential direction of the bearing.

[0024] In an embodiment, the refrigeration device includes an air conditioner.

[0025] In the technical scheme of the utility model, the lubricating oil in the high pressure area enters the communication groove on the crankshaft of the compressor through the plurality of first oil grooves, the communication groove on the rotating crankshaft is communicated with the plurality of first oil grooves when moving to the first position, then the communication groove moves to the position communicated with the plurality of second oil grooves, i.e. the second position, with the continuous rotation of the crankshaft, the lubricating oil temporarily staying in the communication groove flows into the plurality of second oil grooves after a proper time interval and finally reaches the low pressure area, the intermittent oil supply mode maintains proper lubrication and reduces oil injection, the plurality of first oil grooves are uniformly distributed along the circumferential direction of the bearing, and the plurality of second oil grooves are uniformly distributed along the circumferential direction of the bearing, no matter where the crankshaft is located, the lubricating oil can smoothly enter the plurality of first oil grooves and the plurality of second oil grooves at the same time, the force acting on the bearing is the same in the circumferential direction, the instantaneous pressure imbalance is avoided, and the excitation of the bearing is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained from the structures shown in the drawings without creative labor for those skilled in the art.

[0027] Figure 1 It is an embodiment of the structure of the bearing in the related art;

[0028] Figure 2The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure.

[0029] Figure 3 The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure. Figure 2 The side surface schematic diagram of the bearing is shown in the figure.

[0030] Figure 4 The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure. Figure 2 The sectional view of the bearing is shown in the figure.

[0031] Figure 5 The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure.

[0032] Figure 6 The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure. Figure 5 The side surface schematic diagram of the bearing is shown in the figure.

[0033] Figure 7 The structure schematic diagram of the bearing one embodiment provided by the utility model is shown in the figure. Figure 5 The sectional view of the bearing is shown in the figure.

[0034] Figure 8 The partial structure schematic diagram of the compressor one embodiment provided by the utility model is shown in the figure.

[0035] Explanation of the reference signs:

[0036] 2', bearing; 2a', first oil groove; 2b', second oil groove;

[0037] 1, crankshaft; 11, eccentric part; 12, shaft section; 1a, communication groove; 2, bearing; 2a, first oil groove; 2b, second oil groove.

[0038] The realization, functional features and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0040] It should be noted that if the directionality indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the utility model, the directionality indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directionality indication also changes accordingly.

[0041] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the same or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes include "A and / or B", including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0042] In the compressor, the pump body is one of the main noise sources. Especially in those compressors that distinguish high pressure cavity and low pressure cavity, the communication oil groove in the traditional design will cause the lubricating oil to be directly sprayed from the high pressure area to the low pressure area under the action of pressure difference, and the oil groove design may also cause additional excitation to the crankshaft and bearing, thereby causing greater noise and vibration problems during the operation of the compressor.

[0043] The utility model provides a bearing, compressor and refrigeration equipment, aims at solving the problem that the lubricating oil in the compressor flows from the high pressure area to the low pressure area, easily causes additional excitation to the bearing.

[0044] Please refer to Figure 1 And Figure 2 In an embodiment of the utility model, the compressor includes a crankshaft 1 and two bearings 2, the crankshaft 1 is rotatably arranged around its axis, the crankshaft 1 includes an eccentric part 11 and two shaft segments 12 separately arranged on the two sides of the eccentric part 11, the surface of the shaft segment 12 is provided with a communication groove 1a, the two bearings 2 are respectively sleeved on the periphery of the two shaft segments 12, the inner wall of each bearing 2 is provided with a plurality of oil grooves extending along the axial direction of the bearing 2, the plurality of oil grooves includes a plurality of first oil grooves 2a and a plurality of second oil grooves 2b, the plurality of first oil grooves 2a all penetrate one end surface of the bearing 2, the plurality of second oil grooves 2b all penetrate the other end surface of the bearing 2, the plurality of first oil grooves 2a and the plurality of second oil grooves 2b are spaced apart along the circumferential direction of the bearing 2, in the rotation stroke of the crankshaft 1, the communication groove 1a has a first position communicated with the plurality of first oil grooves 2a and a second position communicated with the plurality of second oil grooves 2b, wherein the plurality of first oil grooves 2a are uniformly distributed along the circumferential direction of the bearing 2, and the plurality of second oil grooves 2b are uniformly distributed along the circumferential direction of the bearing 2.

[0045] It can be understood that the crankshaft 1 is rotatably arranged around its axis, and the surface of each shaft segment 12 has the communication groove 1a for guiding the lubricating oil.

[0046] The two bearings 2 are respectively sleeved on the two shaft segments 12 of the crankshaft 1. The inner wall of each bearing 2 has the plurality of oil grooves extending along the axial direction, which are divided into the first oil grooves 2a and the second oil grooves 2b. The first oil grooves 2a penetrate through one end surface of the bearing 2 and communicate with the high-pressure cavity of the compressor, while the second oil grooves 2b penetrate through the other end surface and communicate with the low-pressure cavity of the compressor. The plurality of first oil grooves 2a and the plurality of second oil grooves 2b are spaced along the circumferential direction of the bearing 2, so as to ensure that the communication groove 1a can alternately communicate with the plurality of first oil grooves 2a or the plurality of second oil grooves 2b when the crankshaft 1 rotates.

[0047] In the related art, please refer to Figure 1 , the bearing 2' is provided with a first oil groove 2a' and a second oil groove 2b', and the communication groove of the crankshaft respectively communicates with the first oil groove 2a' and the second oil groove 2b' on the corresponding bearing 2' in the rotation stroke of the crankshaft. When the lubricating oil flows through the first oil groove 2a', the bearing 2' has a force on one side of the first oil groove 2a', and when the lubricating oil flows through the second oil groove 2b', the bearing 2' has a force on one side of the second oil groove 2b', thereby causing the excitation of the bearing.

[0048] In the embodiment, the plurality of first oil grooves 2a are uniformly distributed along the circumferential direction of the bearing 2, and the plurality of second oil grooves 2b are uniformly distributed along the circumferential direction of the bearing 2, so that the flow of the lubricating oil flow is balanced, and the force acting on the bearing is the same in the circumferential direction, thereby reducing the excitation of the bearing 2 caused by the asymmetric flow of the oil, i.e. reducing the additional force acting on the bearing 2, and further reducing the noise and vibration.

[0049] The utility model discloses a technical scheme, in high pressure area lubricating oil through a plurality of first oil groove 2a enter the communicating groove, the crankshaft 1 rotation movement, its on the communicating groove will move to the first position with a plurality of first oil groove 2a intercommunication, then with the crankshaft 1 continues to rotate, the communicating groove will move to the position with a plurality of second oil groove 2b intercommunication, namely the second position, temporarily stay in the lubricating oil in communicating groove flows into a plurality of second oil groove 2b after proper time interval, and finally reaches low pressure area, through intermittent oil supply mode maintains proper lubrication, also can reduce oil injection, through the plurality of first oil groove 2a with a plurality of second oil groove 2b all about the circumferential spacing of the bearing 2 even arrangement, no matter the crankshaft 1 is in which position, lubricating oil can smoothly enter a plurality of first oil groove 2a and a plurality of second oil groove 2b simultaneously, avoid causing instantaneous pressure imbalance, thereby reduce the excitation of bearing 2.

[0050] Specifically, in the embodiment, the number of the plurality of first oil grooves 2a is n1, and 2≤n1≤4.

[0051] If the first oil groove 2a is set too much (more than 4), it will cause the lubricating oil to flow too frequently, causing unnecessary oil injection, leading to internal pressure fluctuations of the system, and thus increasing noise and vibration.

[0052] And when the first oil groove 2a is set too much, the manufacturing process of the bearing 2 becomes more complex, increasing the production cost, while weakening the mechanical strength and service life of the bearing 2.

[0053] Therefore, the number of the first oil groove 2a is set between 2 and 4, ensuring that the lubricating oil can be effectively distributed and circulated, while maintaining the stability of the system and reducing noise and vibration.

[0054] In the embodiment, the number of the plurality of second oil grooves 2b is n2, and 2≤n2≤4.

[0055] If the second oil groove 2b is set too much (more than 4), it will also cause the lubricating oil to flow too frequently, making the manufacturing process more complex, and weakening the mechanical strength and service life.

[0056] It can be understood that the number of the first oil groove 2a and the second oil groove 2b is the same, which can effectively ensure the stability of the lubricating oil transmission.

[0057] Specifically, please refer to Figure 4 and Figure 7In the present embodiment, the height of the bearing is H, the length of the first oil groove 2a in the axial direction of the bearing 2 is hi, the length of the second oil groove 2b in the axial direction of the bearing 2 is h2, and 0.8H≤hi+h2≤1.5H.

[0058] It should be noted that if the sum of hi+h2 is too small, when the communication groove communicates with the first or the second oil groove 2b, the contact area between them will be reduced. During the rotation of the crankshaft 1, the lubricating oil cannot be smoothly transferred from the first oil groove 2a to the communication groove, nor can it be smoothly transferred from the communication groove to the second oil groove 2b, thereby affecting the transmission efficiency of the lubricating oil. In this way, the lubrication effect is reduced, the risk of friction and wear is increased, and additional noise and vibration may be generated.

[0059] If the sum of hi+h2 is too large, so that the length of the first or the second oil groove 2b exceeds the position of the end wall of the communication groove, the lubricating oil may deviate from the preset direction when flowing. The too long oil groove changes the path of the lubricating oil flow, causing part of the lubricating oil to fail to be effectively guided to the low pressure area as designed, so that the flow of the lubricating oil is not smooth.

[0060] Therefore, by setting hi+h2 to be between 0.8H and 1.5H, the lengths of the first oil groove 2a and the second oil groove 2b can provide sufficient contact area to ensure smooth transfer of the lubricating oil, and the flow direction and efficiency of the lubricating oil will not be affected due to being too long. In this way, effective intermittent oil supply can be achieved, and the stability and quiet performance of the system can be maintained.

[0061] In some embodiments, the oil groove is arranged in a spiral shape, and the pitch of the oil groove is S, 20mm≤S≤600mm.

[0062] The oil groove is arranged in a spiral shape along the circumference of the bearing 2, ensuring that the lubricating oil moves along the spiral path under the action of pressure, rather than spreading randomly; the spiral oil groove makes the flow direction of the lubricating oil match the direction of rotation of the crankshaft 1. When the crankshaft 1 rotates, compared to a straight or annular oil groove, which can cause part of the lubricating oil to flow backward or stagnate, the centrifugal force generated by the rotation of the crankshaft 1 assists the flow of the lubricating oil, and the lubricating oil will naturally advance along the path of the spiral groove, reducing the resistance to the flow of the lubricating oil and making the flow smoother.

[0063] A smaller pitch (e.g. close to 20 mm) can make the lubricating oil contact different working surfaces more frequently, providing more intensive lubrication coverage, but at the same time can increase manufacturing difficulty and cost. A larger pitch (e.g. close to 600 mm) can simplify the structure and reduce material usage, but can reduce the frequency of lubricating oil distribution and affect the lubrication effect. Setting the pitch between 20 mm and 600 mm can balance the lubricating oil flow efficiency and system complexity.

[0064] In some embodiments, the oil groove is arranged in a straight line along the axial direction of the bearing 2. This can also achieve the purpose of interval delivery of lubricating oil.

[0065] Specifically, the oil groove is arranged obliquely relative to the axial direction of the bearing 2. It can be understood that the oblique direction of the oil groove matches the direction of rotation of the crankshaft 1, that is, the flow direction of the lubricating oil can conform to the oblique direction of the oil groove. The centrifugal force generated by the rotation of the crankshaft 1 can make the lubricating oil naturally advance along the path of the oil groove, reducing the resistance of the lubricating oil flow.

[0066] Please refer to Figure 4 , the angle between the length direction of the oil groove and the axial direction of the bearing 2 is set to A, 5°≤A≤90°.

[0067] It should be noted that the length direction of the oil groove is the direction of the line connecting the two longest ends of the oil groove. One end of the length direction of the oil groove is parallel to the axial direction of the bearing 2. The angle between this straight line and the length direction of the oil groove is A.

[0068] By arranging the oil groove obliquely and setting the angle between the oil groove and the axial direction of the bearing 2 to be between 5° and 90°, the centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of the lubricating oil. The lubricating oil will naturally advance along the path of the oil groove, reducing the resistance of the lubricating oil flow and making the flow smoother.

[0069] Further, please refer to Figure 4 and Figure 7 In this embodiment, the groove width of the oil groove is w, the groove depth of the oil groove is d1, and the inner diameter of the bearing 2 is d2, where d1≤w≤d2 / 4.

[0070] The groove width w of the oil groove needs to be set to be greater than or equal to the groove depth d1 of the oil groove. The oil groove cannot be too narrow, otherwise the flow amount and flowability of the lubricating oil will be affected. A suitable width can ensure that enough lubricating oil can smoothly enter the oil groove and be effectively distributed to each part that needs lubrication when the crankshaft 1 rotates.

[0071] The groove width w of the oil groove is set to be less than or equal to d2 / 4, ensuring that the oil groove is not too wide, thereby avoiding weakening the structural strength of the bearing 2. An excessively wide oil groove can cause the bearing 2 wall to thin out, reducing its mechanical strength, which in turn affects the service life and reliability of the bearing 2. At the same time, a smaller oil groove width also helps to maintain the concentration and directionality of the lubricating oil flow, preventing excessive spreading or leakage of the lubricating oil.

[0072] Further, in the present embodiment, the first oil groove 2a and the second oil groove 2b are arranged in a staggered manner at the end close to each other in the circumferential direction of the bearing 2.

[0073] It can be understood that the first oil groove 2a and the second oil groove 2b are not directly aligned in the circumferential direction of the bearing 2, but are staggered at an angle. The staggered oil grooves can maintain the continuity of the material of the inner wall of the bearing 2 to some extent, avoiding structural weakening due to excessive material reduction.

[0074] Further, in the present embodiment, the end wall of the end close to each other of the first oil groove 2a and the second oil groove 2b is arranged as an arc surface.

[0075] In this way, a smooth transition path is provided, so that the lubricating oil encounters less resistance when flowing from one oil groove to another. Compared with a right-angle edge or a flat end wall, the arc-shaped end wall reduces sudden changes in liquid flow, avoiding turbulence or eddy currents caused by sudden changes in angle.

[0076] Due to the reduced flow resistance, the lubricating oil can flow more smoothly through the connection area between the oil grooves, preventing the lubricating oil from stagnating or accumulating at the junction of the oil grooves, ensuring that the lubricating oil is always in a dynamic flow state.

[0077] Specifically, in the present embodiment, the compressor is a rotary compressor.

[0078] It should be noted that a rotary compressor is a device that compresses gas through rotational motion, mainly used in air conditioning, refrigeration systems, etc. The rotary compressor uses one or more rotating components (such as a rotor) to move within a closed space to reduce the volume of gas and increase its pressure. Specifically, the rotary compressor has an eccentrically mounted rotor inside, and as the rotor rotates, it forms a series of changing spaces between the rotor and the cylinder wall, which gradually decrease, thereby achieving gas suction, compression, and discharge.

[0079] Symmetrically arranged oil grooves can ensure that the moment generated by the lubricating oil flow is balanced at any rotational position, reducing the unbalanced force caused by asymmetric oil grooves to reduce the vibration of the bearing 2 and the rotary compressor.

[0080] The utility model discloses still provide a kind of refrigeration equipment, which comprises heat exchanger and compressor, the specific structure of this compressor refers to the above embodiment, since the compressor of the present application adopts all technical solutions of the above embodiment, it at least has all beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0081] The refrigeration equipment refers to a device or system for reducing temperature and removing heat, which can be a refrigerator, a freezer or an air conditioner, etc.

[0082] Specifically, in the present embodiment, the refrigeration equipment includes an air conditioner. For the air conditioner, by arranging the plurality of first oil grooves 2a and the plurality of second oil grooves 2b on the bearing 2 to be uniformly spaced about the circumference of the bearing, the vibration and noise of the air conditioner can be reduced, providing a comfortable environment for the user's use.

[0083] The above is only an exemplary embodiment of the utility model, and does not limit the patent scope of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the utility model.

Claims

1. A bearing, characterized by, The inner wall of the bearing is provided with a plurality of oil grooves extending along the axial direction of the bearing, the plurality of oil grooves comprising a plurality of first oil grooves and a plurality of second oil grooves, the plurality of first oil grooves each penetrating one end surface of the bearing, the plurality of second oil grooves each penetrating the other end surface of the bearing, the plurality of first oil grooves and the plurality of second oil grooves being spaced apart along the circumferential direction of the bearing, so that, in the rotation stroke of the crankshaft of the compressor, the communication groove on the crankshaft has a first position in communication with the plurality of first oil grooves and a second position in communication with the plurality of second oil grooves. The plurality of first oil grooves are uniformly distributed along the circumferential direction of the bearing, and the plurality of second oil grooves are uniformly distributed along the circumferential direction of the bearing.

2. The bearing of claim 1, wherein The number of the plurality of first oil grooves is n1, and 2≤n1≤4; and / or, The number of the plurality of second oil grooves is n2, and 2≤n2≤4.

3. The bearing of claim 1, wherein The height of the bearing is H, the length of the first oil groove in the axial direction of the bearing is h1, the length of the second oil groove in the axial direction of the bearing is h2, and 0.8H≤h1+h2≤1.5H.

4. The bearing of claim 1, wherein The oil groove is arranged in a spiral shape, the pitch of the oil groove is S, and 20mm≤S≤600mm.

5. The bearing of claim 1, wherein The oil groove is arranged obliquely relative to the axial direction of the bearing, and the included angle between the length direction of the oil groove and the axial direction of the bearing is A, and 5°≤A≤90°.

6. The bearing of claim 1, wherein The width of the oil groove is w, the depth of the oil groove is d1, and the inner diameter of the bearing is d2, wherein d1≤w≤d2 / 4.

7. The bearing of claim 1, wherein The ends of the first oil groove and the second oil groove close to each other are arranged staggered in the circumferential direction of the bearing; and / or, The end wall of the end of the first oil groove and the second oil groove close to each other is arranged as an arc surface.

8. A compressor characterized by, Comprising: A crankshaft rotatably arranged about an axis, the crankshaft comprising an eccentric portion and two shaft segments respectively arranged on both sides of the eccentric portion, the surface of the shaft segment being provided with a communication groove; and Two bearings according to any one of claims 1 to 7, the two bearings being respectively sleeved on the periphery of the two shaft segments.

9. The compressor of claim 8, wherein, The compressor is a rotary compressor.

10. A refrigeration appliance characterized in that, The compressor according to claim 8 or 9.

11. The refrigeration appliance of claim 10, wherein, The refrigeration equipment comprises an air conditioner.

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