Compressor and refrigeration equipment

Abstract

The utility model discloses a compressor and refrigeration equipment, and relates to the technical field of compressors, the compressor comprises a shell, a crankshaft and two bearings sleeved on two shaft sections of the crankshaft, 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 utility model relates to a compressor technical field, especially a kind of compressor and refrigeration equipment. BACKGROUND

[0002] In air conditioning system, crankshaft and bearing as one of key components, its working principle determines that noise will inevitably be produced in the running process, these noises usually have complex characteristics. Therefore, reducing crankshaft and bearing noise is crucial to improve the overall mute performance of air conditioning system, and is also a key consideration factor in product development.

[0003] Especially in those bearing designs that separate high-pressure cavity and low-pressure cavity, pump body is one of the main noise sources. The communication oil groove in traditional design allows lubricating oil to flow from high-pressure area to low-pressure area under the action of pressure difference, and this flow sometimes occurs in the form of injection. In addition, such oil groove design can generate additional excitation to crankshaft and bearing, causing greater noise and vibration problems when crankshaft is running. SUMMARY

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

[0005] To achieve the above-mentioned purpose, the compressor provided by the utility model comprises:

[0006] A housing;

[0007] A crankshaft is arranged in the housing and can rotate around the axis of the crankshaft, the crankshaft comprises an eccentric part and two shaft segments arranged on both sides of the eccentric part;And

[0008] Two bearings are arranged around the two shaft segments, the inner sides of the two bearings arranged oppositely 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 matching surface of each bearing and the corresponding shaft segment, the plurality of oil grooves comprise a plurality of communication grooves, a plurality of first oil grooves and a plurality of second oil grooves, one of each shaft segment and the corresponding bearing is provided with the plurality of communication grooves, the other is provided with the plurality of first oil grooves and the plurality of second oil grooves arranged at intervals in the axial direction of the bearing, one end of each first oil groove is communicated with the high-pressure area, one end of each second oil groove is communicated with the low-pressure area, and the crankshaft has a first position communicated with the corresponding first oil groove and a second position communicated with the second oil groove in its rotation stroke;

[0010] The plurality of communication grooves are arranged uniformly along the circumference of the crankshaft, the plurality of first oil grooves are arranged uniformly along the circumference of the crankshaft, and the plurality of second oil grooves are arranged uniformly along the circumference of the crankshaft.

[0011] In an embodiment, the plurality of communication grooves are arranged on the shaft segments, and the plurality of first oil grooves and the plurality of second oil grooves are arranged on the bearing.

[0012] In an embodiment, the oil grooves are arranged in a spiral shape; or,

[0013] The oil grooves are arranged obliquely relative to the axial direction of the crankshaft.

[0014] In an embodiment, the crankshaft is arranged to rotate in a first clockwise direction, and the crankshaft has a first end and a second end arranged oppositely;

[0015] In the direction from the first end to the second end of the crankshaft, the first oil grooves, the second oil grooves, and the communication grooves all extend in the first clockwise direction.

[0016] In an embodiment, the length of the communication grooves in the axial direction of the crankshaft is L, and the distance between the ends of the first oil grooves and the second oil grooves close to each other in the circumferential direction of the bearing is D, wherein D / 10≤L≤4D.

[0017] In an embodiment, the number of the communication grooves is N1, and 2≤N1≤4;

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

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

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

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

[0022] The utility model provides a refrigeration equipment, refrigeration equipment includes the compressor, and the compressor includes:

[0023] The shell;

[0024] The crankshaft is arranged in the shell and is rotatable around the axis of the crankshaft, the crankshaft includes an eccentric part and two shaft segments arranged on both sides of the eccentric part; and,

[0025] Two bearings, the two bearings are respectively sleeved on the periphery of the two shaft segments, the inner sides of the two bearings which are oppositely arranged are provided as high-pressure areas, and the outer sides of the two bearings which are away from each other are provided as low-pressure areas;

[0026] The matching surfaces of each of the bearings and the corresponding shaft segment are provided with a plurality of oil grooves extending along the axial direction of the bearing, the plurality of oil grooves include a plurality of communication grooves, a plurality of first oil grooves, and a plurality of second oil grooves, the crankshaft and one of the two bearings are provided with the plurality of communication grooves, and the other is provided with the plurality of first oil grooves and the plurality of second oil grooves which are arranged at intervals in the axial direction of the bearing, one end of each of the first oil grooves is in communication with the high-pressure area, one end of each of the second oil grooves is in communication with the low-pressure area, and in the rotating stroke of the crankshaft, each of the communication grooves has a first position in communication with the corresponding first oil groove and a second position in communication with the second oil groove;

[0027] The plurality of communication grooves, the plurality of first oil grooves, and the plurality of second oil grooves are arranged at intervals along the circumferential direction of the crankshaft.

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

[0029] In the technical scheme, the lubricating oil in the high-pressure area enters the plurality of communication grooves through the plurality of first oil grooves, the crankshaft rotates relative to the bearing, when the plurality of communication grooves move to the first position, they are in communication with the plurality of first oil grooves respectively, then as the crankshaft continues to rotate, the plurality of communication grooves move to the second position and are in communication with the plurality of second oil grooves respectively, the lubricating oil temporarily staying in the plurality of communication grooves 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, and the plurality of communication grooves, the plurality of first oil grooves, and the plurality of second oil grooves are arranged at intervals along the circumferential direction of the crankshaft, so that no matter where the crankshaft is located, the lubricating oil can smoothly enter the plurality of first oil grooves, the plurality of communication grooves, and the plurality of second oil grooves at the same time, thereby avoiding instantaneous pressure imbalance and reducing excitation of the bearing and the crankshaft and reducing the problem of additional excitation of the compression pump by the lubricating oil. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without creative labor.

[0031] Figure 1 Part structure of the compressor one embodiment of the present application is provided cross section schematic view;

[0032] Figure 2 For Figure 1 The structure schematic view of the crankshaft in the first position;

[0033] Figure 3 For Figure 1 The structure schematic view of the crankshaft in the second position;

[0034] Figure 4 For Figure 2 The structure schematic view of the crankshaft;

[0035] Figure 5 For Figure 2 The structure schematic view of the crankshaft from another angle;

[0036] Figure 6 For Figure 2 The structure schematic view of the bearing one embodiment;

[0037] Figure 7 For Figure 6 The side view schematic view of the bearing;

[0038] Figure 8 For Figure 7 The cross section view of the bearing;

[0039] Figure 9 For Figure 2 The structure schematic view of the bearing another embodiment;

[0040] Figure 10 For Figure 9 The side view schematic view of the bearing;

[0041] Figure 11 For Figure 10 The cross section view of the bearing.

[0042] Brief description of the drawings:

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

[0044] The realization of the utility model, functional characteristics and advantages will be further explained by combining with the embodiment, with reference to the drawings. Specific implementation

[0045] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

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

[0047] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the 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, and is not within the protection scope required by the present application.

[0048] The communication oil groove in the conventional 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 such flow sometimes occurs in the form of injection. In addition, such oil groove design can generate additional excitation to the crankshaft and bearing, causing greater noise and vibration problems during the operation of the crankshaft.

[0049] The present application provides a compressor, which aims to solve the problem that the lubricating oil in the compressor flows from the high-pressure area to the low-pressure area, which easily causes additional excitation to the compression pump.

[0050] Please refer to Figure 1 and Figure 2In the embodiment of the utility model, the compressor includes a shell, a crankshaft 1 and two bearings 2, the crankshaft 1 is arranged in the shell, and is rotatably arranged around the axis of the crankshaft 1, the crankshaft 1 includes an eccentric part 11 and two shaft segments 12 arranged on the two sides of the eccentric part 11, the two bearings 2 are respectively sleeved on the periphery of the two shaft segments 12, the inner sides of the two bearings 2 oppositely arranged are arranged as high-pressure areas, and the outer sides of the two bearings 2 mutually facing away are arranged as low-pressure areas, a plurality of oil grooves extending along the axial direction of the bearing 2 are arranged on the matching surface of each bearing 2 and the corresponding shaft segment 12, the plurality of oil grooves include a plurality of communication grooves 12a, a plurality of first oil grooves 2a and a plurality of second oil grooves 2b, one of each shaft segment 12 and the corresponding bearing 2 is provided with the plurality of communication grooves 12a, and the other is provided with the plurality of first oil grooves 2a and the plurality of second oil grooves 2b, one end of each first oil groove 2a is communicated with the high-pressure area, one end of each second oil groove 2b is communicated with the low-pressure area, and the crankshaft 1 has a first position communicated with the corresponding first oil groove 2a and a second position communicated with the second oil groove 2b in the rotation stroke, wherein the plurality of communication grooves 12a are uniformly arranged along the circumferential direction of the crankshaft 1, the plurality of first oil grooves 2a are uniformly arranged along the circumferential direction of the crankshaft 1, and the plurality of second oil grooves 2b are uniformly arranged along the circumferential direction of the crankshaft 1.

[0051] It can be understood that the crankshaft 1 is rotatably arranged around its axis, and the surface of each shaft segment 12 has a plurality of oil grooves, when the surface of the crankshaft 1 is provided with the plurality of communication grooves 12a, then the bearing 2 is provided with the plurality of first oil grooves 2a and the plurality of second oil grooves 2b, when the surface of the crankshaft 1 is provided with the plurality of first oil grooves 2a and the plurality of second oil grooves 2b, the surface of the crankshaft 1 is provided with the plurality of communication grooves 12a, the plurality of communication 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, and it can be understood that when the crankshaft 1 rotates relative to the bearing 2, the lubricating oil flowing through the first oil groove 2a, the communication groove 12a and the second oil groove 2b can penetrate all areas of the matching surface, realizing the lubrication between the crankshaft 1 and the bearing 2.

[0052] The shapes of the first oil groove 2a, the communication groove 12a and the second oil groove 2b can be the same, of course, can be different. But each of the plurality of communication grooves 12a is the same, forming a center of rotation symmetry pattern; each of the plurality of first oil grooves 2a is the same, forming a center of rotation symmetry pattern; each of the plurality of second oil grooves 2b is the same, forming a center of rotation symmetry pattern.

[0053] In this way, the crankshaft 1 and the bearing 2 are in a balanced state in terms of mass distribution, and when the lubricating oil flows, it can maintain balance regardless of whether it reaches the plurality of first oil grooves 2a, the plurality of communication grooves 12a, or the plurality of second oil grooves 2b at the same time, thereby reducing the bearing 2 and the crankshaft 1 excitation caused by the asymmetric flow of 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 scheme of the utility model, the lubricating oil in the high pressure area enters the plurality of communication grooves 12a through the plurality of first oil grooves 2a, the crankshaft 1 rotates relative to the bearing 2, the plurality of communication grooves 12a are communicated with the plurality of first oil grooves 2a when moving to the first position, then with the continuous rotation of the crankshaft 1, the plurality of communication grooves 12a move to the second position and are communicated with the plurality of second oil grooves 2b, the lubricating oil temporarily staying in the plurality of communication grooves 12a flows into the plurality of second oil grooves 2b 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 communication grooves 12a, the plurality of first oil grooves 2a and the plurality of second oil grooves 2b are evenly arranged along the circumference of the crankshaft 1, no matter where the crankshaft 1 is located, the lubricating oil can smoothly enter the plurality of first oil grooves 2a, the plurality of communication grooves 12a and the plurality of second oil grooves 2b at the same time, the force acting on the bearing 2 and the shaft segment 12 is the same in the circumferential direction, avoiding the instantaneous pressure imbalance, thereby reducing the excitation of the bearing 2 and the crankshaft 1 and reducing the problem of additional excitation of the lubricating oil to the compression pump.

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

[0056] Because the crankshaft 1 needs to cooperate with two bearings 2, if each shaft segment 12 is provided with a plurality of first oil grooves 2a and a plurality of second oil grooves 2b, and the crankshaft 1 includes two shaft segments 12, then the oil grooves provided on the crankshaft 1 are excessive. Because each additional oil groove forms a local weak point on the crankshaft 1. Multiple oil grooves cumulatively weaken the overall structural integrity of the crankshaft 1, resulting in a decrease in its bending and torsional resistance. At the same time, the opening of the oil groove, that is, the removal of a certain amount of material from the crankshaft 1, reduces the effective cross-sectional area available for load bearing, reducing the maximum load bearing capacity of the crankshaft 1.

[0057] Therefore, the plurality of first oil grooves 2a and the plurality of second oil grooves 2b are arranged on the bearing 2, and the two groups of first oil grooves 2a and second oil grooves 2b are evenly distributed on the two bearings 2, rather than being arranged entirely on the crankshaft 1, to avoid excessive oil grooves weakening the strength and stiffness of the crankshaft 1.

[0058] In some embodiments, the oil grooves are 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.

[0059] Specifically, the oil grooves are arranged obliquely relative to the axial direction of the bearing 2. It can be understood that the oblique direction of the oil grooves is arranged in the same direction as the rotation direction of the crankshaft 1, that is, the flow direction of the lubricating oil can conform to the oblique direction of the oil grooves, and the centrifugal force generated by the rotation of the crankshaft 1 can naturally make the lubricating oil advance along the path of the oil grooves, reducing the resistance of the lubricating oil flow.

[0060] In other embodiments, the oil grooves are arranged in a spiral shape.

[0061] The oil grooves are arranged in a spiral shape along the circumferential direction of the bearing 2, ensuring that the lubricating oil moves along the spiral path under pressure rather than spreading randomly; the spiral-shaped oil grooves make the flow direction of the lubricating oil match the rotation direction of the crankshaft 1. When the crankshaft 1 rotates, compared to straight-line or ring-shaped oil grooves, which can cause part of the lubricating oil to flow backward or stagnate, the centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of the lubricating oil, and the lubricating oil can naturally advance along the path of the spiral groove, reducing the resistance of the lubricating oil flow and making the flow smoother.

[0062] Further, in the present embodiment, the crankshaft 1 is arranged to rotate in a first clockwise direction, and the crankshaft 1 has oppositely arranged first and second ends; from the first end to the second end of the crankshaft 1, the first oil grooves 2a, the second oil grooves 2b, and the communication grooves 12a all extend in the first clockwise direction.

[0063] It should be noted that the first clock direction can refer to the clockwise direction or the counterclockwise direction. In the present scheme, the crankshaft 1 is arranged to rotate around the first clock direction, and the first oil groove 2a, the second oil groove 2b and the communication groove 12a all extend along the first clock direction, indicating that the first oil groove 2a, the second oil groove 2b and the communication groove 12a are arranged in the same direction as the rotation direction of the crankshaft 1, rather than limiting the rotation direction of the crankshaft 1.

[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 oil groove in the forward direction will naturally push the lubricating oil along with the rotation of the crankshaft 1, rather than resisting the rotation direction of the crankshaft 1, so as to reduce the impact force of the liquid on the surface of the solid, thereby reducing the excitation.

[0065] On the contrary, if the oil groove extends along the counterclockwise direction, and the crankshaft 1 rotates clockwise, then 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 "flow against the current" to transport the lubricating oil, which will cause higher fluid resistance and increase the excitation or vibration due to the impact of the oil flow on the surface of the crankshaft 1.

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

[0067] A smaller pitch (e.g. close to 20mm) can make the lubricating oil contact different working surfaces more frequently, providing more intensive lubrication coverage, but it can also increase the manufacturing difficulty and cost. A larger pitch (e.g. close to 600mm) can simplify the structure and reduce material usage, but it can reduce the distribution frequency of the lubricating oil and affect the lubrication effect. By setting the pitch between 20mm and 600mm, the lubricating oil flow efficiency and system complexity can be balanced.

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

[0069] It is to be noted that the length direction of the first oil groove 2a is the direction of the line connecting 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 connecting 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 from one end of the length direction of the first oil groove 2a, and the included 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 from one end of the length direction of the second oil groove 2b, and the included 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 arranged obliquely, and the included angle between the axial direction of the bearing 2 and the length direction of the first oil groove 2a and the length direction of the second oil groove 2b is arranged to be between 5° and 90°. The centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of lubricating oil, and 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.

[0071] In some embodiments, the included angle between the length direction of the communication groove a and the axial direction of the crankshaft 1 is arranged to be B, 5°≤B≤90°. Figure 4

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

[0073] The communication groove a is arranged obliquely, and the included angle between the axial direction of the crankshaft 1 and the length direction of the communication groove a is arranged to be between 5° and 90°. The centrifugal force generated by the rotation of the crankshaft 1 can assist the flow of lubricating oil, and the lubricating oil will naturally advance along the path of the communication groove a, reducing the resistance of the lubricating oil flow and making the flow smoother.

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

[0075] If the first oil groove 2a, the communication groove 12a, and the second oil groove 2b are arranged too much (more than 4), the flow of lubricating oil will be too frequent, causing unnecessary oil ejection, leading to fluctuations in the internal pressure of the system, and thus increasing noise and vibration.

[0076] ​And the first oil groove 2a, the communication groove 12a and the second oil groove 2b are set too much, so that the manufacturing process of the bearing 2 is more complex, increases the production cost, at the same time weakens the mechanical strength and the life of the bearing 2.

[0077] Therefore, the number of the first oil groove 2a, the communication groove 12a and the second oil groove 2b is set between 2 to 4, which ensures 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 number of the first oil groove 2a, the communication groove 12a and the second oil groove 2b is set to effectively ensure the stability of the lubricating oil transmission.

[0079] Further, in the embodiment, the first oil groove 2a and the second oil groove 2b are staggered in the circumferential direction of the bearing 2.

[0080] 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 a certain angle. The staggered oil groove can maintain the continuity of the material of the inner wall of the bearing 2 to a certain extent, avoiding the weakening of the structure caused by excessive material reduction.

[0081] Further, in the embodiment, the length of the communication groove 12a in the axial direction of the crankshaft 1 is L, and the distance between the first oil groove 2a and the second oil groove 2b in the circumferential direction of the bearing 2 is D, wherein D / 10≤L≤4D.

[0082] Therefore, the first oil groove 2a and the second oil groove 2b are arranged at a certain distance in the circumferential direction of the bearing 2, so that the communication groove 12a needs to be separated for a certain time before it is communicated with the first oil groove 2a or the second oil groove 2b during rotation, so as to better achieve the purpose of interval oil transmission.

[0083] Specifically, please refer to Figure 5 and Figure 8 In the 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 is to be noted that if the sum of h1+h2 is too small, the contact area between the communication groove 12a and the first or the second oil groove 2b will be reduced when they are in communication. During the rotation of the crankshaft 1, the lubricating oil cannot be smoothly transferred from the first oil groove 2a to the communication groove 12a, nor can it be smoothly transferred from the communication 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 can be generated.

[0085] If the sum of h1+h2 is too large, the length of the first or the second oil groove 2b exceeds the position of the end wall of the communication groove 12a, and the lubricating oil can deviate from the preset direction when flowing. The excessively 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.

[0086] Therefore, h1+h2 is set to be between 0.8H and 1.5H, which not only ensures that 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, but also will not affect the flow direction and efficiency of the lubricating oil 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.

[0087] Further, in the present 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 width w of the oil groove needs to be set to be greater than or equal to the 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 sufficient lubricating oil can smoothly enter the oil groove and be effectively distributed to each part that needs to be lubricated during the rotation of the crankshaft 1.

[0089] The width w of the oil groove is set to be less than or equal to d2 / 4, which ensures that the oil groove is not too large, thereby avoiding weakening the structural strength of the bearing 2. An excessively wide oil groove can cause the wall of the bearing 2 to be too thin, reducing its mechanical strength, and thereby affecting 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 diffusion or leakage of the lubricating oil.

[0090] Further, in the present embodiment, the end wall of the first oil groove 2a and the second oil groove 2b at the end close to each other is provided as an arc surface.

[0091] 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 to a right angle edge or a flat end wall, the arc-shaped end wall reduces sudden changes in liquid flow, avoiding turbulence or eddies caused by abrupt changes in angle.

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

[0093] Specifically, in the present embodiment, the compressor is a rotary compressor.

[0094] 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 installed 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.

[0095] The 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.

[0096] The utility model also proposes a refrigeration equipment, the refrigeration equipment includes heat exchanger and compressor, the specific structure of this compressor refers to the above -mentioned embodiment, because this compressor adopts all the technical schemes of the above -mentioned embodiment, therefore at least has all the beneficial effects brought by the technical scheme of the above -mentioned embodiment, here will not repeat.

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

[0098] 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 symmetric about the axis center of the bearing 2, and arranging the plurality of communication grooves 12a on the crankshaft 1 to be symmetric about the axis center of the bearing 2, the vibration and noise of the air conditioner can be reduced, providing a comfortable and adaptive environment for user's use.

[0099] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A compressor characterized by, The compressor comprises: a housing; a crankshaft arranged in the housing and rotatable about an axis of the crankshaft, the crankshaft comprising an eccentric portion and two shaft segments respectively arranged on two sides of the eccentric portion; and two bearings respectively sleeved on peripheries of the two shaft segments, inner sides of the two bearings arranged in opposite positions being high-pressure zones and outer sides of the two bearings arranged in positions away from each other being low-pressure zones; a plurality of oil grooves arranged on a matching surface of each of the bearings and the corresponding shaft segment, the plurality of oil grooves comprising a plurality of communication 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 being provided with the plurality of communication grooves, and the other being provided with the plurality of first oil grooves and the plurality of second oil grooves, one end of each of the first oil grooves being in communication with the high-pressure zone, and one end of each of the second oil grooves being in communication with the low-pressure zone, each of the communication grooves having a first position in communication with the corresponding first oil groove and a second position in communication with the second oil groove in a rotation stroke of the crankshaft. The plurality of communication grooves are arranged uniformly along a circumferential direction of the crankshaft, the plurality of first oil grooves are arranged uniformly along the circumferential direction of the crankshaft, and the plurality of second oil grooves are arranged uniformly along the circumferential direction of the crankshaft.

2. The compressor of claim 1, wherein, The plurality of communication grooves are arranged on the shaft segments, and the plurality of first oil grooves and the plurality of second oil grooves are arranged on the bearings.

3. The compressor of claim 1, wherein, The oil grooves are arranged in a spiral shape; or The oil grooves are arranged in an inclined manner relative to an axial direction of the crankshaft.

4. The compressor of claim 3, wherein, The crankshaft is arranged to rotate in a first clockwise direction, and the crankshaft has first and second ends arranged in opposite positions; In a direction from the first end to the second end of the crankshaft, the first oil grooves, the second oil grooves, and the communication grooves all extend in the first clockwise direction.

5. The compressor of claim 1, wherein, A length of the communication grooves in the axial direction of the crankshaft is L, and a distance between the ends of the first oil grooves and the second oil grooves close to each other in the circumferential direction of the bearing is D, wherein D / 10≤L≤4D.

6. The compressor of claim 1, wherein, A number of the communication grooves is N1, and 2≤N1≤4; A number of the first oil grooves is N2, and 2≤N2≤4; A number of the second oil grooves is N3, and 2≤N3≤4.

7. The compressor of claim 1, wherein, The ends of the first oil grooves and the second oil grooves close to each other are arranged in a staggered manner in the circumferential direction of the bearing.

8. The compressor of claim 1, wherein, The compressor is a rotary compressor.

9. A refrigeration appliance characterized in that, The compressor comprises the rotary compressor as claimed in claim 8.

10. The refrigeration appliance of claim 9, wherein, The refrigeration equipment comprises an air conditioner.

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