Compressor and refrigeration equipment

Abstract

The invention discloses a compressor and refrigeration equipment, and relates to the technical field of compressors, the compressor comprises a shell, a crankshaft and two bearings arranged on two shaft sections of the crankshaft in a sleeving mode, a plurality of communicating grooves, a plurality of first oil grooves and a plurality of second oil grooves which extend in the axial direction of the bearings are formed in the matching surfaces of the bearings and the corresponding shaft sections, the plurality of communicating grooves are formed in one of the shaft sections and the corresponding bearings, and the plurality of first oil grooves and the plurality of second oil grooves are formed in the other one of the shaft sections and the corresponding bearings; the multiple communicating grooves, the multiple first oil grooves and the multiple second oil grooves are evenly distributed in the circumferential direction of the crankshaft at intervals, no matter where the crankshaft is located, lubricating oil can smoothly enter the multiple first oil grooves, the multiple communicating grooves and the multiple second oil grooves at the same time, and force acting on the bearing and the shaft section is the same in the circumferential direction; instantaneous pressure unbalance is avoided, and therefore excitation to the crankshaft and the bearing is reduced.

Description

Technical Field

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

[0002] In the air conditioning system, the crankshaft and bearing are one of the key components. Their working principle determines that noise will inevitably be generated during operation. These noises usually have complex characteristics. Therefore, reducing the crankshaft and bearing noise is crucial to improving the overall quiet performance of the air conditioning system and is also a key consideration in product development.

[0003] Especially in those bearing designs that separate high-pressure and low-pressure chambers, the pump body is one of the main noise sources. The connecting oil groove in the traditional design allows the lubricating oil to flow from the high-pressure area to the low-pressure area under the action of the pressure difference, and this flow sometimes occurs in the form of a jet. In addition, such an oil groove design may produce additional excitation effects on the crankshaft and bearings, causing greater noise and vibration problems when the crankshaft is running. Summary of the invention

[0004] The main purpose of the present invention is to provide a compressor and a refrigeration device, aiming to solve the problem that when the lubricating oil in the compressor flows from the high-pressure area to the low-pressure area, it is easy to cause additional excitation to the compression pump.

[0005] To achieve the above object, the compressor proposed by the present invention comprises:

[0006] case;

[0007] A crankshaft is disposed in the housing and is rotatable around the axis of the crankshaft, wherein the crankshaft includes an eccentric portion and two shaft sections disposed on both sides of the eccentric portion; and

[0008] Two bearings, the two bearings are respectively sleeved on the peripheries of the two shaft sections, the inner sides of the two bearings opposite to each other are set as high-pressure areas, and the outer sides of the two bearings facing away from each other are set as low-pressure areas;

[0009] A plurality of oil grooves extending along the axial direction of the bearing are arranged on the mating surface of each of the bearings and the corresponding shaft segment, and the plurality of oil grooves include a plurality of connecting grooves, a plurality of first oil grooves, and a plurality of second oil grooves. One of each of the shaft segment and the corresponding bearing is provided with the plurality of connecting grooves, and the other is provided with the plurality of first oil grooves and the plurality of second oil grooves spaced apart in the axial direction of the bearing. One end of each of the first oil grooves is connected to the high-pressure area, and one end of each of the second oil grooves is connected to the low-pressure area. In the rotation stroke of the crankshaft, each of the connecting grooves has a first position connected to the corresponding first oil groove, and a second position connected to the second oil groove.

[0010] The plurality of connecting grooves are evenly spaced along the circumference of the crankshaft, the plurality of first oil grooves are evenly spaced along the circumference of the crankshaft, and the plurality of second oil grooves are evenly spaced along the circumference of the crankshaft.

[0011] In one embodiment, the plurality of connecting grooves are disposed on the shaft segment, and the plurality of first oil grooves and the plurality of second oil grooves are disposed on the bearing.

[0012] In one embodiment, the oil groove is arranged in a spiral shape; or,

[0013] The oil groove is arranged to be inclined relative to the axial direction of the crankshaft.

[0014] In one embodiment, the crankshaft is arranged to rotate around a first clockwise direction, and the crankshaft has a first end and a second end arranged opposite to each other;

[0015] In a direction from the first end to the second end of the crankshaft, the first oil groove, the second oil groove and the connecting groove all extend along the first clockwise direction.

[0016] In one embodiment, the connecting groove has an axial length of L in the crankshaft, and a distance between mutually adjacent ends of the first oil groove and the second oil groove in the circumferential direction of the bearing is D, wherein D / 10≤L≤4D.

[0017] In one embodiment, the number of the connecting grooves is N1, 2≤N1≤4;

[0018] The number of the first oil tanks is N2, 2≤N2≤4;

[0019] The number of the second oil grooves is N3, 2≤N3≤4.

[0020] In one embodiment, the ends of the first oil groove and the second oil groove that are close to each other are staggered in the circumferential direction of the bearing.

[0021] In one embodiment, the compressor is a rotary compressor.

[0022] The present invention provides a refrigeration device, the refrigeration device comprises a compressor, and the compressor comprises:

[0023] case;

[0024] A crankshaft is disposed in the housing and is rotatable around the axis of the crankshaft, wherein the crankshaft includes an eccentric portion and two shaft sections disposed on both sides of the eccentric portion; and

[0025] Two bearings, the two bearings are respectively sleeved on the peripheries of the two shaft sections, the inner sides of the two bearings opposite to each other are set as high-pressure areas, and the outer sides of the two bearings facing away from each other are set as low-pressure areas;

[0026] A plurality of oil grooves extending along the axial direction of the bearing are arranged on the mating surface of each of the bearings and the corresponding shaft segment, and the plurality of oil grooves include a plurality of connecting grooves, a plurality of first oil grooves, and a plurality of second oil grooves. One of the crankshaft and the two bearings is provided with the plurality of connecting grooves, and the other is provided with the plurality of first oil grooves and the plurality of second oil grooves spaced apart in the axial direction of the bearing. One end of each of the first oil grooves is connected to the high-pressure area, and one end of each of the second oil grooves is connected to the low-pressure area. In the rotation stroke of the crankshaft, each of the connecting grooves has a first position connected to the corresponding first oil groove, and a second position connected to the second oil groove.

[0027] Wherein, the plurality of connecting grooves, the plurality of first oil grooves and the plurality of second oil grooves are evenly spaced along the circumference of the crankshaft.

[0028] In one embodiment, the refrigeration device includes an air conditioner.

[0029] In the technical solution of the present invention, the lubricating oil in the high-pressure area enters the multiple connecting grooves through the multiple first oil grooves. When the crankshaft rotates relative to the bearing, the multiple connecting grooves will move to the first position and connect with the multiple first oil grooves respectively. Then, as the crankshaft continues to rotate, the multiple connecting grooves will move to the second position and connect with the multiple second oil grooves respectively. The lubricating oil temporarily staying in the multiple connecting grooves will flow into the multiple second oil grooves after an appropriate time interval and finally reach the low-pressure area. While maintaining proper lubrication through intermittent oil supply, oil spray can also be reduced. By evenly arranging the multiple connecting grooves, the multiple first oil grooves and the multiple second oil grooves along the circumferential interval of the crankshaft, no matter which position the crankshaft is in, the lubricating oil can smoothly enter the multiple first oil grooves, the multiple connecting grooves and the multiple second oil grooves at the same time, avoiding instantaneous pressure imbalance, thereby reducing the excitation to the bearings and the crankshaft, and reducing the problem of additional excitation of the compression pump by the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic cross-sectional view of a partial structure of an embodiment of a compressor provided by the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure in which the middle crankshaft is in the first position;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure in which the middle crankshaft is in the second position;

[0034] Figure 4 for Figure 2 Schematic diagram of the structure of the middle crankshaft;

[0035] Figure 5 for Figure 2 A structural diagram of the middle crankshaft from another perspective;

[0036] Figure 6 for Figure 2 A schematic structural diagram of an embodiment of a middle bearing;

[0037] Figure 7 for Figure 6 Side view of the middle bearing;

[0038] Figure 8 for Figure 7 Cross-section of the middle bearing;

[0039] Fig. 9 for Figure 2 A schematic structural diagram of another embodiment of a middle bearing;

[0040] Fig.10 for Fig. 9 Side view of the middle bearing;

[0041] Fig.11 for Fig.10 Cross-section of the middle bearing.

[0042] Description of Figure Numbers:

[0043] 1. crankshaft; 11. eccentric portion; 12. shaft section; 12a. connecting groove; 2. bearing; 2a. first oil groove; 2b. second oil groove.

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The interconnecting oil grooves in the traditional design allow the lubricating oil to flow from the high-pressure area to the low-pressure area under the action of the pressure difference, and this flow sometimes occurs in the form of a jet. In addition, such an oil groove design may produce additional excitation effects on the crankshaft and bearings, causing greater noise and vibration problems when the crankshaft is running.

[0049] The present invention provides a compressor, aiming to solve the problem that when lubricating oil in the compressor flows from a high-pressure area to a low-pressure area, it is easy to cause additional excitation to a compression pump.

[0050] See also Figure 1 and Figure 2In one embodiment of the present invention, the compressor includes a housing, a crankshaft 1 and two bearings 2. The crankshaft 1 is arranged in the housing and is rotatable around the axis of the crankshaft 1. The crankshaft 1 includes an eccentric portion 11 and two shaft segments 12 respectively arranged on both sides of the eccentric portion 11; the two bearings 2 are respectively sleeved on the peripheries of the two shaft segments 12, the inner sides of the two bearings 2 arranged opposite to each other are set as high-pressure areas, and the outer sides of the two bearings 2 facing away from each other are set as low-pressure areas; a plurality of oil grooves extending along the axial direction of the bearing 2 are arranged on the mating surfaces of each of the bearings 2 and the corresponding shaft segment 12, the plurality of oil grooves include a plurality of connecting grooves 12a, a plurality of first oil grooves 2a, and a plurality of second oil grooves 2b, and each of the shaft segments 12 One of the corresponding bearings 2 is provided with the multiple connecting grooves 12a, and the other is provided with the multiple first oil grooves 2a and the multiple second oil grooves 2b, one end of each of the first oil grooves 2a is connected to the high-pressure area, and one end of each of the second oil grooves 2b is connected to the low-pressure area. In the rotation stroke of the crankshaft 1, each of the connecting grooves 12a has a first position connected to the corresponding first oil groove 2a, and a second position connected to the second oil groove 2b; wherein, the multiple connecting grooves 12a are evenly spaced along the circumference of the crankshaft 1, the multiple first oil grooves 2a are evenly spaced along the circumference of the crankshaft 1, and the multiple second oil grooves 2b are evenly spaced along the circumference of the crankshaft 1.

[0051] It can be understood that the crankshaft 1 is rotatably arranged around its axis, and each of the shaft segments 12 has a plurality of oil grooves on its surface. When the crankshaft 1 has a plurality of connecting grooves 12a on its surface, the bearing 2 has a plurality of first oil grooves 2a and a plurality of second oil grooves 2b on its surface; when the crankshaft 1 has a plurality of first oil grooves 2a and a plurality of second oil grooves 2b on its surface, the crankshaft 1 has a plurality of connecting grooves 12a on its surface, and the plurality of connecting grooves 12a are used to guide the lubricating oil flowing into the plurality of first oil grooves 2a to the plurality of second oil grooves 2b. It can be understood that when the crankshaft 1 rotates relative to the bearing 2, the lubricating oil flowing through the first oil grooves 2a, the connecting grooves 12a and the second oil grooves 2b can penetrate and cover all areas of the mating surface, thereby achieving lubrication between the crankshaft 1 and the bearing 2.

[0052] The shapes of the first oil groove 2a, the connecting groove 12a and the second oil groove 2b can be the same, or they can be different. However, the connecting grooves 12a in the plurality of connecting grooves 12a are arranged in the same way as each other, forming a rotationally symmetrical figure; the first oil grooves 2a in the plurality of first oil grooves 2a are arranged in the same way as each other, forming a rotationally symmetrical figure; the second oil grooves 2b in the plurality of second oil grooves 2b are arranged in the same way as each other, forming a rotationally symmetrical figure.

[0053] In this way, the crankshaft 1 and the bearing 2 are in a balanced state in terms of mass distribution. When the lubricating oil flows, no matter it reaches the multiple first oil grooves 2a, the multiple connecting grooves 12a, or the multiple second oil grooves 2b at the same time, it can maintain balance, thereby reducing the excitation of the bearing 2 and the crankshaft 1 caused by the asymmetric flow of the oil, that is, reducing the additional force acting on the bearing 2 and the crankshaft 1, thereby reducing noise and vibration.

[0054] In the technical solution of the present invention, the lubricating oil in the high-pressure area enters the multiple connecting grooves 12a through the multiple first oil grooves 2a. When the crankshaft 1 rotates relative to the bearing 2, the multiple connecting grooves 12a move to the first position and are respectively connected with the multiple first oil grooves 2a. Then, as the crankshaft 1 continues to rotate, the multiple connecting grooves 12a move to the second position and are respectively connected with the multiple second oil grooves 2b. The lubricating oil temporarily staying in the multiple connecting grooves 12a flows into the multiple second oil grooves 2b after an appropriate time interval and finally reaches the low-pressure area. The intermittent oil supply method is used to maintain the low-pressure area. While maintaining proper lubrication, it can also reduce oil spraying, by arranging the multiple connecting grooves 12a, the multiple first oil grooves 2a and the multiple second oil grooves 2b evenly along the circumferential interval of the crankshaft 1, no matter which position the crankshaft 1 is in, the lubricating oil can smoothly enter the multiple first oil grooves 2a, the multiple connecting grooves 12a and the multiple second oil grooves 2b at the same time, and the forces acting on the bearing 2 and the shaft section 12 are the same in the circumferential direction, avoiding instantaneous pressure imbalance, thereby reducing the excitation of the bearing 2 and the crankshaft 1, and reducing the problem of additional excitation of the compression pump by the lubricating oil.

[0055] Further, in this embodiment, the plurality of connecting grooves 12 a are provided on the shaft segment 12 , and the plurality of first oil grooves 2 a and the plurality of second oil grooves 2 b are provided on the bearing 2 .

[0056] Since the crankshaft 1 needs to cooperate with the two bearings 2, if each of the shaft sections 12 is provided with the multiple first oil grooves 2a and the multiple second oil grooves 2b, and the crankshaft 1 includes two shaft sections 12, then there are too many oil grooves provided on the crankshaft 1. Because each additional oil groove will form a local weak point on the crankshaft 1. The accumulation of multiple oil grooves will weaken the overall structural integrity of the crankshaft 1, resulting in a decrease in its bending and torsion resistance. At the same time, the opening of the oil groove means removing a certain amount of material from the crankshaft 1, reducing the effective cross-sectional area that can be used to bear the load, and reducing the maximum load-bearing capacity of the crankshaft 1.

[0057] In this way, the multiple first oil grooves 2a and the multiple second oil grooves 2b are arranged on the bearing 2, and the two groups of the first oil grooves 2a and the second oil grooves 2b are evenly distributed on the two bearings 2, rather than being all arranged on the crankshaft 1, so as to avoid too many oil grooves weakening the strength and rigidity of the crankshaft 1.

[0058] In some embodiments, the oil groove is extended along the axial straight line of the bearing 2, so as to achieve the purpose of delivering lubricating oil at intervals.

[0059] Specifically, the oil groove is inclined relative to the axial direction of the bearing 2. It can be understood that the inclination direction of the oil groove is consistent with the rotation direction of the crankshaft 1, that is, the flow direction of the lubricating oil can conform to the inclination direction of the oil groove. The centrifugal force generated by the rotation of the crankshaft 1 makes the lubricating oil naturally move along the path of the oil groove, which can reduce the resistance to the flow of the lubricating oil.

[0060] In other embodiments, the oil groove is arranged in a spiral shape.

[0061] The oil grooves are arranged in a spiral shape along the circumference of the bearing 2, ensuring that the lubricating oil moves along a spiral path under pressure instead of spreading randomly; the spiral oil grooves make the flow direction of the lubricating oil match the direction of rotation of the crankshaft 1. When the crankshaft 1 rotates, compared with linear or annular oil grooves that may cause some lubricating oil to flow back 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 move along the path of the spiral groove, reducing the resistance to the flow of the lubricating oil and making the flow smoother.

[0062] Furthermore, in this embodiment, the crankshaft 1 is arranged to rotate around a first clockwise direction, and the crankshaft 1 has a first end and a second end arranged opposite to each other; in the direction from the first end to the second end of the crankshaft 1, the first oil groove 2a, the second oil groove 2b and the connecting groove 12a all extend along the first clockwise direction.

[0063] It should be noted that the first clockwise direction may refer to the clockwise direction or the counterclockwise direction. In the present embodiment, the crankshaft 1 is arranged to rotate around the first clockwise direction, and the first oil groove 2a, the second oil groove 2b and the connecting groove 12a all extend along the first clockwise direction, indicating that the first oil groove 2a, the second oil groove 2b and the connecting groove 12a are arranged in the same direction as the rotation direction of the crankshaft 1, but the rotation direction of the crankshaft 1 is not limited.

[0064] It can be understood that if the extension direction of the oil groove is consistent with the rotation direction of the crankshaft 1 (i.e., both are clockwise), then during the rotation of the crankshaft 1, the forward oil groove will naturally push the lubricating oil as the crankshaft 1 rotates, rather than resisting the direction of rotation of the crankshaft 1, so as to reduce the impact force of the liquid on the solid surface and thereby reduce the excitation.

[0065] On the contrary, if the oil groove extends in the counterclockwise direction and the crankshaft 1 rotates clockwise, the flow direction of the lubricating oil will be opposite to the rotation direction of the crankshaft 1. In this case, the oil groove must "go upstream" to transport the lubricating oil, which will result in higher fluid resistance and increase the excitation or vibration caused by the oil flow impacting the surface of the crankshaft 1.

[0066] Further, in this embodiment, the pitch of the oil groove is S, 20mm≤S≤600mm.

[0067] A smaller pitch (e.g., close to 20 mm) allows the lubricant to contact different working surfaces more frequently, providing denser lubrication coverage, but it may also increase manufacturing difficulty and cost. A larger pitch (e.g., close to 600 mm) can simplify the structure and reduce material usage, but it may reduce the frequency of lubricant distribution and affect the lubrication effect. Setting the pitch between 20 mm and 600 mm can balance the lubricant flow efficiency and system complexity.

[0068] In some other embodiments, see Figure 4 The angle between the length direction of the first oil groove 2a and the axial direction of the bearing 2 is set to A1, 5°≤A1≤90°, and the angle between the length direction of the second oil groove 2b and the axial direction of the bearing 2 is set to A2, 5°≤A2≤90°.

[0069] It should be noted that the length direction of the first oil groove 2a is the direction of the line between the two ends of the first oil groove 2a with the longest distance; the length direction of the second oil groove 2b is the direction of the line between the two ends of the second oil groove 2b with the longest distance. A straight line parallel to the axial direction of the bearing 2 is drawn at one end of the length direction of the first oil groove 2a, and the angle between the straight line and the length direction of the first oil groove 2a is A1; a straight line parallel to the axial direction of the bearing 2 is drawn at one end of the length direction of the second oil groove 2b, and the angle between the straight line and the length direction of the second oil groove 2b is A2.

[0070] The first oil groove 2a and the second oil groove 2b are tilted, and the angle between them and the axial direction of the bearing 2 is set between 5° and 90°. The centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of lubricating oil. The lubricating oil will naturally move along the path of the oil groove, reducing the resistance to the flow of the lubricating oil and making the flow smoother.

[0071] In some other embodiments, see Figure 4 The angle between the length direction of the connecting groove a and the axial direction of the crankshaft 1 is set to B, 5°≤B≤90°.

[0072] It should be noted that the length direction of the connecting groove a is the direction of the line connecting the two ends of the connecting groove a with the longest distance. A straight line parallel to the axial direction of the crankshaft 1 is drawn with one end of the connecting groove a in the length direction, and the angle between the straight line and the length direction of the connecting groove a is B.

[0073] The connecting groove a is tilted, and the angle between it and the axial direction of the crankshaft 1 is set between 5° and 90°. The centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of lubricating oil. The lubricating oil will naturally move along the path of the connecting groove a, reducing the resistance to the flow of the lubricating oil and making the flow smoother.

[0074] Furthermore, in some embodiments, the number of the connecting grooves 12a is N1, 2≤N1≤4; the number of the first oil grooves 2a is N2, 2≤N2≤4; and the number of the second oil grooves 2b is N3, 2≤N3≤4.

[0075] If there are too many first oil grooves 2a, connecting grooves 12a and second oil grooves 2b (more than 4), the lubricating oil will flow too frequently, causing unnecessary oil spraying, resulting in pressure fluctuations inside the system, and further increasing noise and vibration.

[0076] Furthermore, when too many of the first oil grooves 2 a , the connecting grooves 12 a and the second oil grooves 2 b are provided, the manufacturing process of the bearing 2 becomes more complicated, the production cost is increased, and the mechanical strength and life of the bearing 2 are weakened.

[0077] In this way, the number of the first oil groove 2a, the connecting groove 12a and the second oil groove 2b 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.

[0078] It can be understood that the stability of lubricating oil transmission can be effectively ensured only when the number of the first oil grooves 2a, the connecting grooves 12a and the second oil grooves 2b is the same.

[0079] Furthermore, in this embodiment, the ends of the first oil groove 2 a and the second oil groove 2 b that are close to each other are staggered in the circumferential direction of the bearing 2 .

[0080] It is understandable 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 a certain angle. The staggered oil grooves can maintain the continuity of the inner wall material of the bearing 2 to a certain extent, and avoid structural weakening caused by excessive material reduction.

[0081] Furthermore, in this embodiment, the length of the connecting groove 12a in the axial direction of the crankshaft 1 is L, and the distance between the ends of the first oil groove 2a and the second oil groove 2b close to each other in the circumferential direction of the bearing 2 is D, wherein D / 10≤L≤4D.

[0082] In this way, the first oil groove 2a and the second oil groove 2b are spaced a considerable distance apart in the circumferential direction of the bearing 2, so that when the connecting groove 12a rotates, a certain period of time is required to connect with the first oil groove 2a or the second oil groove 2b respectively, so as to better achieve the purpose of interval transmission of oil.

[0083] Specifically, see Figure 5 and Figure 8 In this 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 h1, the length of the second oil groove 2b in the axial direction of the bearing 2 is h2, and 0.8H≤h1+h2≤1.5H.

[0084] It should be noted that if the sum of h1+h2 is too small, when the connecting groove 12a is connected to the first or second oil groove 2b, the contact area between the two 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 connecting groove 12a, nor can it be smoothly transferred from the connecting groove 12a to the second oil groove 2b, thereby affecting the transfer 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.

[0085] If the sum of h1+h2 is too large, so that the length of the first or second oil groove 2b exceeds the end wall position of the connecting groove 12a, the lubricating oil may deviate from the preset direction when flowing. An overly long oil groove will change the path of the lubricating oil flow, resulting in part of the lubricating oil not being effectively guided to the low-pressure area as designed, resulting in poor flow of the lubricating oil.

[0086] Therefore, h1+h2 is set between 0.8H and 1.5H, which ensures that the length of the first oil groove 2a and the second oil groove 2b can provide sufficient contact area to ensure smooth transfer of lubricating oil, while not affecting the flow direction and efficiency of the lubricating oil due to excessive length. In this way, effective intermittent oil supply can be achieved, and the stability and quietness of the system can be maintained.

[0087] Furthermore, in this embodiment, the width of the oil groove is w, the depth of the oil groove is d1, and the inner diameter of the bearing 2 is d2, wherein d1≤w≤d2 / 4.

[0088] 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, and the oil groove cannot be too narrow, otherwise the flow amount and fluidity of the lubricating oil will be affected. The appropriate width can ensure that sufficient lubricating oil can smoothly enter the oil groove and be effectively distributed to various parts that need lubrication when the crankshaft 1 rotates.

[0089] The groove width w of the oil groove is set to be less than or equal to d2 / 4 to ensure that the oil groove is not too large, thereby avoiding weakening the structural strength of the bearing 2. An overly wide oil groove may cause the wall of the bearing 2 to become thinner, reduce its mechanical strength, and further affect the 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 and prevent excessive diffusion or leakage of the lubricating oil.

[0090] Furthermore, in this embodiment, the end wall of one end of the first oil groove 2a and the second oil groove 2b that are close to each other is configured as a curved surface.

[0091] In this way, a smooth transition path is set, so that the lubricating oil encounters less resistance when flowing from one oil groove to another. Compared with right-angled edges or flat end walls, the curved end wall reduces sudden changes in liquid flow and avoids turbulence or vortices caused by sudden angle changes.

[0092] Due to the reduced flow resistance, the lubricating oil can pass through the connecting areas between the oil grooves more smoothly, 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.

[0093] Specifically, in this embodiment, the compressor is a rotor compressor.

[0094] It should be noted that a rotary compressor is a device that compresses gas through rotational motion, and is mainly used in air conditioning, refrigeration systems, etc. The rotary compressor uses one or more rotating parts (such as rotors) to move in a confined space to reduce the volume of the gas and increase its pressure. Specifically, there is an eccentrically mounted rotor inside the rotary compressor. As the rotor rotates, a series of changing spaces are formed between it and the cylinder wall, and these spaces gradually decrease, thereby achieving the suction, compression and discharge of the gas.

[0095] The symmetrically arranged oil grooves can ensure that the torque generated by the lubricating oil flow is balanced at any rotational position, reducing the unbalanced force caused by the asymmetric oil grooves, so as to reduce the vibration of the bearing 2 and the rotor compressor.

[0096] The present invention also proposes a refrigeration device, which includes a heat exchanger and a compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0097] The refrigeration equipment refers to a device or system for reducing temperature and removing heat. The refrigeration equipment may be a refrigerator, a freezer or an air conditioner.

[0098] Specifically, in this embodiment, the refrigeration device includes an air conditioner. For the air conditioner, by setting the plurality of first oil grooves 2a and the plurality of second oil grooves 2b on the bearing 2 to be symmetrical about the axis center of the bearing 2, and setting the plurality of connecting grooves 12a on the crankshaft 1 to be symmetrical about the axis center of the bearing 2, the vibration and noise of the air conditioner can be reduced, and a comfortable adaptation environment can be provided for the user.

[0099] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: case; A crankshaft is disposed in the housing and is rotatable around the axis of the crankshaft, wherein the crankshaft includes an eccentric portion and two shaft sections disposed on both sides of the eccentric portion; and Two bearings, the two bearings are respectively sleeved on the peripheries of the two shaft sections, the inner sides of the two bearings opposite to each other are set as high-pressure areas, and the outer sides of the two bearings facing away from each other are set as low-pressure areas; A plurality of oil grooves are provided on the mating surfaces of each of the bearings and the corresponding shaft segments, and the plurality of oil grooves include a plurality of connecting grooves, a plurality of first oil grooves, and a plurality of second oil grooves. One of each of the shaft segments and the corresponding bearings is provided with the plurality of connecting grooves, and the other is provided with the plurality of first oil grooves and the plurality of second oil grooves. One end of each of the first oil grooves is connected to the high-pressure area, and one end of each of the second oil grooves is connected to the low-pressure area. In the rotation stroke of the crankshaft, each of the connecting grooves has a first position connected to the corresponding first oil groove, and a second position connected to the second oil groove. The plurality of connecting grooves are evenly spaced along the circumference of the crankshaft, the plurality of first oil grooves are evenly spaced along the circumference of the crankshaft, and the plurality of second oil grooves are evenly spaced along the circumference of the crankshaft.

2. The compressor according to claim 1, characterized in that The plurality of communicating grooves are arranged on the shaft segment, and the plurality of first oil grooves and the plurality of second oil grooves are arranged on the bearing.

3. The compressor according to claim 1, characterized in that The oil groove is arranged in a spiral shape; or, The oil groove is arranged to be inclined relative to the axial direction of the crankshaft.

4. The compressor according to claim 3, characterized in that The crankshaft is arranged to rotate around a first clockwise direction, and the crankshaft has a first end and a second end arranged opposite to each other; In a direction from the first end to the second end of the crankshaft, the first oil groove, the second oil groove and the connecting groove all extend along the first clockwise direction.

5. The compressor according to claim 1, characterized in that The length of the connecting groove in the axial direction of the crankshaft is L, and the distance between the ends of the first oil groove and the second oil groove close to each other in the circumferential direction of the bearing is D, wherein D / 10≤L≤4D.

6. The compressor according to claim 1, characterized in that The number of the connecting grooves is N1, 2≤N1≤4; The number of the first oil tanks is N2, 2≤N2≤4; The number of the second oil grooves is N3, 2≤N3≤4.

7. The compressor according to claim 1, characterized in that The ends of the first oil groove and the second oil groove that are close to each other are staggered in the circumferential direction of the bearing.

8. The compressor according to claim 1, characterized in that The compressor is a rotary compressor.

9. A refrigeration device, characterized in that: Comprising the compressor of claim 8.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration equipment includes an air conditioner.

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