Connecting rod, pump body assembly, compressor and refrigeration equipment

Abstract

The utility model discloses a connecting rod, a pump body assembly, a compressor and refrigeration equipment, and relates to the technical field of compressors, and the connecting rod comprises a rod body, a first end part and a second end part; the first end part is arranged at the first end of the rod body and is used for sleeving a crank of a crankshaft; the second end part is arranged at the second end of the rod body and is used for sleeving a piston pin; wherein the inner side wall of the first end part is provided with a first oil groove along the axial direction of the first end part, and / or the inner side wall of the second end part is provided with a second oil groove along the axial direction of the second end part. According to the technical scheme, friction loss and energy consumption of the compressor can be reduced, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a connecting rod, a pump body component, a compressor and a refrigeration device. Background Art

[0002] The friction loss of a reciprocating compressor is one of the important factors affecting its mechanical efficiency. When the compressor is running, the crankshaft drives the connecting rod, and the connecting rod drives the piston to reciprocate in the cylinder. This reciprocating motion causes greater friction between the big end of the connecting rod and the crankshaft crank, and between the small end of the connecting rod and the piston pin, thereby increasing the friction loss and energy consumption of the compressor. It also accelerates the wear and aging of the compressor, reducing the service life of the compressor. Utility Model Content

[0003] The main purpose of the utility model is to provide a connecting rod, a pump body assembly, a compressor and a refrigeration device, aiming to reduce the friction loss and energy consumption of the compressor and extend the service life of the compressor.

[0004] To achieve the above-mentioned purpose, the present invention provides a connecting rod, comprising:

[0005] Rod body;

[0006] A first end portion is provided at the first end of the rod body, and the first end portion is used for sleeve-mounting a crank of a crankshaft;

[0007] A second end portion is provided at the second end of the rod body, and the second end portion is used for sleeve-mounting a piston pin;

[0008] The inner side wall of the first end portion is provided with a first oil groove along the axial direction of the first end portion, and / or the inner side wall of the second end portion is provided with a second oil groove along the axial direction of the second end portion.

[0009] In one embodiment, a communication oil passage is formed in the rod body, and the communication oil passage communicates with the inner hole of the first end portion and the inner hole of the second end portion.

[0010] In one embodiment, the first oil groove is located on a side of the inner sidewall of the first end away from the connecting oil passage;

[0011] And / or, the second oil groove is located on a side of the inner side wall of the second end portion away from the connecting oil channel.

[0012] In one embodiment, the direction from the first end toward the second end is defined as an initial line, the angle between the starting end of the first oil groove and the initial line is d_e1, the angle between the ending end of the first oil groove and the initial line is d_s1, and the coverage angle of the first oil groove is d_s1-d_e1;

[0013] And / or, the direction from the first end toward the second end is defined as an initial line, the angle between the starting end of the second oil groove and the initial line is d_e2, the angle between the ending end of the second oil groove and the initial line is d_s2, and the coverage angle of the second oil groove is 360°-(d_s2-d_e2).

[0014] In one embodiment, the coverage angle of the first oil groove satisfies: 120°≤d_e1≤150°, 210°≤d_s1≤240°;

[0015] And / or, the coverage angle of the second oil groove satisfies: 30°≤d_e2≤60°, 300°≤d_s2≤330°.

[0016] In one embodiment, the first oil groove includes at least two first groove bodies distributed along the axial direction of the first end portion;

[0017] And / or, the second oil groove includes at least two second groove bodies distributed along the axial direction of the second end portion.

[0018] In one embodiment, the height of the first end portion is defined as H1, the inner diameter of the first end portion is defined as D1, and the height of the first groove body is defined as h1, then: H1 / 4≤h1 <D1 / 2;

[0019] And / or, define the height of the second end portion as H2, the inner diameter of the second end portion as D2, and the height of the second trough body as h2, then: H2 / 4≤h2 <D2 / 2。

[0020] In one embodiment, the distance w1 between two adjacent sections of the first groove body is greater than 2 mm;

[0021] And / or, the distance w2 between two adjacent sections of the second groove body is greater than 2 mm.

[0022] In one embodiment, the inner diameter of the first end portion is defined as D1, and the depth of the first oil groove is defined as d1, then the following conditions are satisfied: D1 / 300≤d1≤D1 / 200;

[0023] The inner diameter of the second end portion is defined as D2, and the depth of the second oil groove is defined as d2, then the following conditions are satisfied: D2 / 300≤d2≤D2 / 200.

[0024] In one embodiment, the depth d1 of the first oil groove and / or the depth d2 of the second oil groove is 10 μm to 1000 μm.

[0025] To achieve the above objectives, the present invention further provides a pump assembly, comprising:

[0026] cylinder;

[0027] A piston is disposed in the cylinder and is provided with a piston pin;

[0028] a crankshaft provided with an eccentrically arranged crank;

[0029] As in the connecting rod described above, the first end portion is sleeved on the crank, the second end portion is inserted into the piston, and the piston pin passes through the piston and the second end portion.

[0030] To achieve the above-mentioned object, the present invention further provides a compressor, which is characterized by comprising the pump body assembly as described above.

[0031] To achieve the above object, the present invention further provides a refrigeration device, characterized in that it includes the compressor as described above.

[0032] The technical solution of the present invention is to provide a first oil groove on the inner side wall of the first end of the connecting rod, and / or a second oil groove on the inner side wall of the second end. When the first end is sleeved on the crank of the crankshaft, lubricating oil can be introduced into the first oil groove, which can effectively reduce the friction between the first end of the connecting rod and the crank of the crankshaft; and when the second end is sleeved on the piston pin (i.e., the piston pin is inserted into the second end), lubricating oil can be introduced into the second oil groove, which can effectively reduce the friction between the second end of the connecting rod and the piston pin. In this way, the friction loss and energy consumption of the compressor during the reciprocating motion can be effectively reduced, thereby extending the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0034] Figure 1 A schematic structural diagram of an embodiment of a connecting rod provided by the present utility model;

[0035] Figure 2 A top view of an embodiment of a connecting rod provided by the present utility model;

[0036] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] 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

[0041] 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 embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0042] 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 indications will also change accordingly.

[0043] 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 for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. 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 mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The friction loss of a reciprocating compressor is one of the important factors affecting its mechanical efficiency. When the compressor is running, the crankshaft drives the connecting rod, and the connecting rod drives the piston to reciprocate in the cylinder. This reciprocating motion causes greater friction between the big end of the connecting rod and the crankshaft crank, and between the small end of the connecting rod and the piston pin, thereby increasing the friction loss and energy consumption of the compressor. It also accelerates the wear and aging of the compressor, reducing the service life of the compressor.

[0045] To address the above-mentioned issues, the present invention proposes a connecting rod 10 for use in a pump assembly, which is then used in a compressor to reduce friction loss and energy consumption in the compressor, thereby extending the compressor's service life. The pump assembly includes a cylinder, a piston, a crankshaft, and a connecting rod 10. The piston is disposed within the cylinder and is provided with a vertically extending piston pin. The piston pin is also provided through a second end 13 of the connecting rod 10. The crankshaft is disposed within the cylinder, and a crankshaft of the crankshaft is provided through a first end 12 of the connecting rod 10.

[0046] This pump assembly is used in a compressor, which includes a stator, a rotor, and a pump assembly. The rotor is inserted into the stator and connected to the crankshaft (specifically, the connection can be achieved by interference fit, screws, snaps, etc.). The cylinder of the pump assembly is mounted on the stator. When the compressor is running, the rotor drives the crankshaft to rotate. The crank and connecting rod 10, and the connecting rod 10 and the piston pin, drive the piston to reciprocate in the cylinder. During this reciprocating motion, the piston drives the valve group to complete the suction, compression, and exhaust processes. The structure of the connecting rod 10 is described below by way of an embodiment.

[0047] See also Figures 1 to 3 In one embodiment of the present invention, the connecting rod 10 includes a rod body 11, a first end portion 12 and a second end portion 13; the first end portion 12 is provided at the first end of the rod body 11, and the first end portion 12 is used to sleeve the crank of the crankshaft; the second end portion 13 is provided at the second end of the rod body 11, and the second end portion 13 is used to sleeve the piston pin; wherein, the inner side wall of the first end portion 12 is provided with a first oil groove 121 along the axial direction of the first end portion 12, and / or the inner side wall of the second end portion 13 is provided with a second oil groove 131 along the axial direction of the second end portion 13.

[0048] As can be understood, the rod body 11 is an elongated rod-shaped structure having a first end and a second end oppositely disposed. The first end 12 is an annular structure connected to the first end of the rod body 11, and the second end 13 is also an annular structure connected to the second end of the rod body 11. The first end 12 is a large end, and the second end 13 is a small end. The inner diameter of the first end 12 is larger than the inner diameter of the second end 13.

[0049] In actual application, the first end portion 12 can be integrally formed with the rod body 11, or can be connected to the first end of the rod body 11 by bonding, screwing, or clamping. Furthermore, the second end portion 13 can be integrally formed with the rod body 11, or can be connected to the second end of the rod body 11 by bonding, screwing, or clamping.

[0050] In this embodiment, to improve the connection reliability between the first end portion 12 and the rod body 11, a structure having an arcuate connection surface can be formed at the first end of the rod body 11, so that the arcuate connection surface cooperates with the outer arcuate surface of the first end portion 12. This can increase the connection area between the first end portion 12 and the rod body 11, thereby improving the connection reliability between the first end portion 12 and the rod body 11. Similarly, to improve the connection reliability between the second end portion 13 and the rod body 11, a structure having an arcuate connection surface can be formed at the second end of the rod body 11, so that the arcuate connection surface cooperates with the outer arcuate surface of the second end portion 13. This can increase the connection area between the second end portion 13 and the rod body 11, thereby improving the connection reliability between the second end portion 13 and the rod body 11.

[0051] In actual application, the first oil groove 121 can penetrate at least one end surface of the first end portion 12 to facilitate the introduction of lubricating oil into the first oil groove 121. Similarly, the second oil groove 131 can penetrate at least one end surface of the second end portion 13 to facilitate the introduction of lubricating oil into the second oil groove 131. The first oil groove 121 and the second oil groove 131 can be connected or disconnected. When the first oil groove 121 and the second oil groove 131 are connected, the lubricating oil in the first oil groove 121 can flow to the second oil groove 131, and the lubricating oil in the second oil groove 131 can also flow to the first oil groove 121. During the rotation of the crankshaft, the crank of the crankshaft drives the connecting rod 10 to rotate, so that the lubricating oil in the first oil groove 121 can flow to the inner hole of the first end portion 12 and lubricate the friction pair between the first end portion 12 and the crank of the crankshaft, thereby reducing the friction between the first end portion 12 of the connecting rod 10 and the crank of the crankshaft; at the same time, the lubricating oil in the second oil groove 131 can flow to the inner hole of the second end portion 13 and lubricate the friction pair between the second end portion 13 and the piston pin, thereby reducing the friction between the second end portion 13 of the connecting rod 10 and the piston pin.

[0052] In summary, the technical solution of the present invention is to provide a first oil groove 121 on the inner side wall of the first end portion 12 of the connecting rod 10, and / or to provide a second oil groove 131 on the inner side wall of the second end portion 13. When the first end portion 12 is mounted on the crankshaft crank, lubricating oil can be introduced into the first oil groove 121, which can effectively reduce the friction between the first end portion 12 of the connecting rod 10 and the crankshaft; and when the second end portion 13 is mounted on the piston pin (i.e., the piston pin is inserted into the second end portion 13), lubricating oil can be introduced into the second oil groove 131, which can effectively reduce the friction between the second end portion 13 of the connecting rod 10 and the piston pin. In this way, the friction loss and energy consumption of the compressor during the reciprocating motion can be effectively reduced, thereby extending the service life of the compressor.

[0053] See also Figures 1 to 3In one embodiment of the present invention, a connecting oil passage 111 is formed in the rod body 11 , and the connecting oil passage 111 connects the inner hole of the first end portion 12 and the inner hole of the second end portion 13 .

[0054] In this configuration, the inner hole of the first end portion 12 and the inner hole of the second end portion 13 are connected through the connecting oil passage 111 on the rod body 11. In this way, during the rotation of the crankshaft, the connecting rod 10 is driven to rotate by the crank of the crankshaft, so that the lubricating oil in the first oil groove 121 can flow to the inner hole of the first end portion 12 and lubricate the friction pair between the first end portion 12 and the crank of the crankshaft. The lubricating oil can also flow to the inner hole of the second end portion 13 through the connecting oil passage 111 of the rod body 11 and lubricate the friction pair between the second end portion 13 and the piston pin; or, The lubricating oil in the second oil groove 131 can also flow to the inner hole of the second end portion 13 first, and lubricate the friction pair between the second end portion 13 and the piston pin. The lubricating oil can also flow to the inner hole of the first end portion 12 through the connecting oil passage 111 of the rod body 11, and lubricate the friction pair between the first end portion 12 and the crank of the crankshaft. In this way, the lubricating oil can be introduced into the first oil groove 121 or the second oil groove 131, and there is no need to set up two oil passages to introduce the lubricating oil into the first oil groove 121 and the second oil groove 131 respectively, which can simplify the structural design.

[0055] In practical applications, an oil inlet 132 may be provided on the outer side wall of the first end portion 12 and / or the second end portion 13 to introduce lubricating oil into the first oil groove 121 and / or the second oil groove 131 through the oil inlet 132 .

[0056] In one embodiment, an oil inlet 132 may be provided on the outer wall of the second end portion 13, and the lubricating oil may first enter the second oil groove 131 through the oil inlet 132, then flow to the gap between the second end portion 13 and the piston pin, and then flow to the gap between the first end portion 12 and the crank and the first oil groove 121 through the connecting oil passage 111 of the rod body 11.

[0057] In actual use, the first oil groove 121 can be directly connected to the connecting oil passage 111, or the first oil groove 121 can be connected to the connecting oil passage 111 through the gap between the first end 12 and the crank. Similarly, the second oil groove 131 can be directly connected to the connecting oil passage 111, or the second oil groove 131 can be connected to the connecting oil passage 111 through the gap between the second end 13 and the piston pin.

[0058] See also Figures 1 to 3 In one embodiment of the present invention, the first oil groove 121 is located on a side of the inner sidewall of the first end portion 12 away from the connecting oil passage 111; that is, the first oil groove 121 is not directly connected to the connecting oil passage 111, but rather the first oil groove 121 is connected to the connecting oil passage 111 through a gap between the first end portion 12 and the crank.

[0059] The second oil groove 131 is located on the side of the inner wall of the second end portion 13 away from the connecting oil passage 111; that is, the second oil groove 131 is not directly connected to the connecting oil passage 111, but the second oil passage is connected to the connecting oil passage 111 through the gap between the second end portion 13 and the piston pin.

[0060] Such an arrangement can ensure that the lubricating oil in the first oil groove 121 fully enters the gap between the first end portion 12 and the crank, lubricates the friction pair between the first end portion 12 and the crank, and then flows to the connecting oil passage 111 of the rod body 11, thereby ensuring the lubrication effect between the first end portion 12 and the crank; similarly, it can ensure that the lubricating oil in the second oil groove 131 fully enters the gap between the second end portion 13 and the piston pin, lubricates the friction pair between the second end portion 13 and the piston pin, and then flows to the connecting oil passage 111 of the rod body 11, thereby ensuring the lubrication effect between the second end portion 13 and the crank.

[0061] See also Figure 2 In one embodiment of the present invention, the direction from the first end 12 to the second end 13 is defined as an initial line a, the angle between the starting end of the first oil groove 121 and the initial line a is d_e1, the angle between the ending end of the first oil groove 121 and the initial line a is d_s1, and the coverage angle of the first oil groove 121 is d_s1-d_e1.

[0062] With this arrangement, the first oil groove 121 can be an arc-shaped groove rather than a complete annular groove, which can ensure that the first end portion 12 has sufficient supporting strength for the crank, thereby ensuring the reliability of the crank driving the connecting rod 10 to rotate.

[0063] It should be noted that the initial line a is a 0° line. Along the counterclockwise direction of the first end 12, the angle between the starting end of the first oil groove 121 and the initial line a is d_e1, and the angle between the ending end of the first oil groove 121 and the initial line a is d_s1.

[0064] See also Figure 2 In one embodiment of the present invention, the direction from the first end 12 to the second end 13 is defined as the initial line a, the angle between the starting end of the second oil groove 131 and the initial line a is d_e2, the angle between the ending end of the second oil groove 131 and the initial line a is d_s2, and the coverage angle of the second oil groove 131 is 360°-(d_s2-d_e2).

[0065] With this arrangement, the second oil groove 131 can be an arc-shaped groove at one end rather than a complete annular groove, which can ensure that the second end 13 has sufficient supporting strength for the piston pin, thereby ensuring the reliability of the installation of the piston pin to the piston and the second end 13.

[0066] It should be noted that the initial line a is a 0° line. Along the counterclockwise direction of the second end 13, the angle between the starting end of the second oil groove 131 and the initial line a is d_e2, and the angle between the ending end of the second oil groove 131 and the initial line a is d_s2.

[0067] It should be noted that, since the coverage angle of the first oil groove 121 is too small, the amount of lubricating oil stored in the first oil groove 121 is too small to meet the lubrication effect between the first end 12 and the crank, resulting in large friction between the first end 12 of the connecting rod 10 and the crank; and since the coverage angle of the first oil groove 121 is too large, the strength of the first end 12 will be reduced, which will affect the support reliability of the first end 12 on the crank.

[0068] Based on this, see Figure 2 In one embodiment of the present invention, the coverage angle of the first oil groove 121 satisfies: 120°≤d_e1≤150°, 210°≤d_s1≤240°.

[0069] In this way, by controlling the angle between the starting end of the first oil groove 121 and the initial line a, as well as the angle between the ending end of the first oil groove 121 and the initial line a, the coverage angle of the first oil groove 121 can be controlled, which can effectively reduce the friction between the first end portion 12 and the crank, and at the same time ensure the support reliability of the first end portion 12 on the crank.

[0070] As some examples, the angle between the starting end of the first oil groove 121 and the initial line a can be specifically 120°, 125°, 130°, 135°, 138°, 140°, 145°, 147°, 150°, etc.; the angle between the ending end of the first oil groove 121 and the initial line a can be specifically 210°, 216°, 220°, 223°, 225°, 230°, 232°, 235°, 238°, 240°, etc.

[0071] Similarly, it should be noted that, since the coverage angle of the second oil groove 131 is too small, the amount of lubricating oil stored in the second oil groove 131 is too small to meet the lubrication effect between the second end portion 13 and the piston pin, resulting in high friction between the second end portion 13 of the connecting rod 10 and the piston pin; and since the coverage angle of the second oil groove 131 is too large, the strength of the second end portion 13 will be reduced, thereby affecting the support reliability of the second end portion 13 for the piston pin.

[0072] Based on this, see Figure 2 In one embodiment of the present invention, the coverage angle of the second oil groove 131 satisfies: 30°≤d_e2≤60°, 300°≤d_s2≤330°.

[0073] In this way, by controlling the angle between the starting end of the second oil groove 131 and the initial line a, as well as the angle between the ending end of the second oil groove 131 and the initial line a, the coverage angle of the second oil groove 131 can be controlled, which can effectively reduce the friction between the second end portion 13 and the piston pin, and at the same time ensure the reliability of the support of the second end portion 13 for the piston pin.

[0074] As some examples, the angle between the starting end of the second oil groove 131 and the initial line a can be 30°, 35°, 40°, 45°, 48°, 50°, 55°, 57°, 60°, etc.; the angle between the ending end of the second oil groove 131 and the initial line a can be 300°, 306°, 310°, 313°, 315°, 320°, 322°, 325°, 328°, 330°, etc.

[0075] See also Figure 1 、 Figure 3 In one embodiment of the present invention, the first oil groove 121 includes at least two first groove bodies 121 a distributed along the axial direction of the first end portion 12 .

[0076] In this way, by configuring the first oil groove 121 to be divided into at least two sections of first groove bodies 121 a , it is easier to machine the first oil groove 121 on the inner side wall of the first end portion 12 .

[0077] In practical applications, two adjacent sections of the first slot body 121 a may be connected to each other or may not be connected to each other.

[0078] See also Figure 1 、 Figure 3 In one embodiment of the present invention, the second oil groove 131 includes at least two second groove bodies distributed along the axial direction of the second end portion 13 .

[0079] In this way, by configuring the second oil groove 131 to be divided into at least two sections of second groove bodies, it is easier to machine the second oil groove 131 on the inner side wall of the second end portion 13 .

[0080] In practical applications, two adjacent sections of the second slot bodies may be connected to each other or not.

[0081] It should be noted that, when the height of the first groove body 121a is too low, the amount of lubricating oil stored in the first oil groove 121 is too small, which cannot meet the lubrication effect between the first end portion 12 and the crank, resulting in large friction between the first end portion 12 of the connecting rod 10 and the crank; and when the height of the first groove body 121a is too high, the strength of the first end portion 12 is insufficient, which will also cause a large loss of lubricating oil in the first oil groove 121.

[0082] Based on this, see Figure 3In one embodiment of the present invention, the height of the first end portion 12 is defined as H1, the inner diameter of the first end portion 12 is defined as D1, and the height of the first groove body 121a is defined as h1, then: H1 / 4≤h1 <D1 / 2。

[0083] In this way, by rationally designing the height of the first groove body 121a according to the overall height and inner diameter of the first end portion 12, the friction between the first end portion 12 and the crank can be effectively reduced, while also ensuring the strength of the first end portion 12 and reducing the loss of lubricating oil.

[0084] Similarly, it should be noted that, when the height of the second trough body is too low, the amount of lubricating oil stored in the second oil groove 131 is too small, and the lubrication effect between the second end portion 13 and the piston pin cannot be met, resulting in high friction between the second end portion 13 of the connecting rod 10 and the piston pin; and when the height of the second trough body is too high, the strength of the second end portion 13 is insufficient, which will also cause a large loss of lubricating oil in the second oil groove 131.

[0085] Based on this, see Figure 3 In one embodiment of the present invention, the height of the second end portion 13 is defined as H2, the inner diameter of the second end portion 13 is D2, and the height of the second groove body is h2, then: H2 / 4≤h2 <D2 / 2。

[0086] With this arrangement, by rationally designing the height of the second groove body according to the overall height and inner diameter of the second end portion 13 , the friction between the second end portion 13 and the piston pin can be effectively reduced, while also ensuring the strength of the second end portion 13 and reducing the loss of lubricating oil.

[0087] See also Figure 3 In one embodiment of the present invention, the spacing w1 between two adjacent first grooves 121a is greater than 2mm; in this way, the height of the first groove 121a can be prevented from being too high, thereby ensuring the strength of the first end portion 12 and reducing the loss of lubricating oil.

[0088] As some examples, the distance between two adjacent first groove bodies 121a can be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0089] See also Figure 3 In one embodiment of the present invention, the spacing w2 between two adjacent sections of the second groove body is greater than 2 mm; in this way, the height of the second groove body can be prevented from being too high, so as to ensure the strength of the second end portion 13 and reduce the loss of lubricating oil.

[0090] As some examples, the spacing between two adjacent sections of the second groove body can be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0091] It should be noted that, when the depth of the first oil groove 121 is too shallow, the amount of lubricating oil stored in the first oil groove 121 is too small, which cannot meet the lubrication effect between the first end 12 and the crank, resulting in high friction between the first end 12 of the connecting rod 10 and the crank; and when the depth of the first groove body 121a is too deep, the strength of the first end 12 is insufficient, which will affect the lubrication effect between the first end 12 and the crank.

[0092] Based on this, see Figure 2 、 Figure 3 In one embodiment of the present invention, the inner diameter of the first end portion 12 is defined as D1, and the depth of the first oil groove 121 is defined as d1, and the following conditions are satisfied: D1 / 300≤d1≤D1 / 200.

[0093] In this way, by rationally designing the depth of the first groove 121 a according to the inner diameter of the first end portion 12 , the friction between the first end portion 12 and the crank can be effectively reduced, while also ensuring the strength and lubrication effect of the first end portion 12 .

[0094] It should be noted that, when the depth of the second oil groove 131 is too shallow, the amount of lubricating oil stored in the second oil groove 131 is too small, and the lubrication effect between the second end portion 13 and the piston pin cannot be met, resulting in high friction between the second end portion 13 of the connecting rod 10 and the piston pin; and when the depth of the second groove body is too deep, the strength of the second end portion 13 is insufficient, which in turn affects the lubrication effect between the second end portion 13 and the piston pin.

[0095] Based on this, see Figure 2 、 Figure 3 In one embodiment of the present invention, the inner diameter of the second end portion 13 is defined as D2, and the depth of the second oil groove 131 is defined as d2, then the following conditions are satisfied: D2 / 300≤d2≤D2 / 200.

[0096] With this arrangement, by rationally designing the depth of the second groove according to the inner diameter of the second end portion 13 , the friction between the second end portion 13 and the piston pin can be effectively reduced, while also ensuring the strength and lubrication effect of the second end portion 13 .

[0097] See also Figure 2In one embodiment of the present invention, the depth d1 of the first oil groove 121 and / or the depth d2 of the second oil groove 131 is 10μm to 1000μm; in this way, the depth of the first oil groove 121 and / or the second oil groove 131 can be avoided from being too shallow or too deep, and the corresponding end strength and lubrication effect can be effectively guaranteed.

[0098] As some examples, the depth of the first oil groove 121 and / or the depth of the second oil groove 131 can be 10μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 150μm, 200μm, 250μm, 300μm, 350μm, 400μm, 450μm, 500μm, 550μm, 600μm, 650μm, 700μm, 800μm, 900μm, 1000mm, etc.

[0099] In practical applications, the depth of the first oil groove 121 and the depth of the second oil groove 131 may be the same or different.

[0100] The present invention also proposes a pump body assembly, which includes a cylinder, a piston, a crankshaft and a connecting rod 10. The specific structure of the connecting rod 10 refers to the above embodiment. Since the present pump body assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0101] The piston is arranged in the cylinder, and a piston pin is passed through the piston; the crankshaft is provided with an eccentric crank; the first end 12 is sleeved on the crank, the second end 13 is inserted into the piston, and the piston pin is passed through the piston and the second end 13.

[0102] It can be understood that when the first end 12 is sleeved on the crank of the crankshaft, lubricating oil can be introduced into the first oil groove 121, which can effectively reduce the friction between the first end 12 of the connecting rod 10 and the crank of the crankshaft; and when the piston pin is inserted into the piston and the second end 13, lubricating oil can be introduced into the second oil groove 131, which can effectively reduce the friction between the second end 13 of the connecting rod 10 and the piston pin; in this way, the friction loss and energy consumption of the compressor during the reciprocating motion can be effectively reduced, thereby extending the service life of the compressor.

[0103] The present invention also proposes a compressor, which includes a pump body assembly. The specific structure of the pump body assembly 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 described one by one here.

[0104] In this embodiment, the compressor may further include a stator and a rotor, the rotor being inserted into the stator and connected to the crankshaft (specifically, the connection may be achieved by interference fit, screws, snaps, etc.), and the cylinder of the pump body assembly being installed on the stator; when the compressor is running, the rotor drives the crankshaft to rotate, and the piston is driven to reciprocate in the cylinder through the cooperation between the crank and the connecting rod 10, and the cooperation between the connecting rod 10 and the piston pin. During the reciprocating motion, the piston drives the valve group to complete the processes of suction, compression and exhaust.

[0105] As an example, the compressor may be a reciprocating compressor.

[0106] In one embodiment, the compressor provided by this solution can reduce the friction loss associated with the connecting rod 10. The coverage angles of the first oil groove 121 and the second oil groove 131 corresponding to the large end (first end 12) and the small end (second end 13), respectively, are shown in Table 1 below. The simulation results of the friction loss of the connecting rod 10 are shown in Table 2 below:

[0107] Table 1 Coverage angles of the first and second oil grooves corresponding to the large and small ends respectively

[0108]

[0109] Table 2 Simulation results of connecting rod friction loss

[0110]

[0111] In summary, according to the simulation results in Table 2, the connecting rod 10 provided with the first oil groove 121 and the second oil groove 131 has a friction loss reduced by up to 0.182W compared to the connecting rod 10 without the first oil groove 121 and the second oil groove 131 when the film thickness is equivalent, which reflects the effect of the first oil groove 121 and the second oil groove 131 on reducing the friction loss of the connecting rod 10.

[0112] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above embodiment. Since the present refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0113] As an example, the refrigeration device may be a refrigerator.

[0114] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A connecting rod, characterized in that: include: Rod body; A first end portion is provided at the first end of the rod body, and the first end portion is used for sleeve-mounting a crank of a crankshaft; A second end portion is provided at the second end of the rod body, and the second end portion is used for sleeve-mounting a piston pin; Wherein, the inner side wall of the first end portion is provided with a first oil groove along the axial direction of the first end portion, and / or the inner side wall of the second end portion is provided with a second oil groove along the axial direction of the second end portion; An initial line is defined as the direction from the first end toward the second end. The angle between the starting end of the first oil groove and the initial line is d_e1. The angle between the ending end of the first oil groove and the initial line is d_s1. The coverage angle of the first oil groove is d_s1-d_e1. And / or, the direction from the first end toward the second end is defined as an initial line, the angle between the starting end of the second oil groove and the initial line is d_e2, the angle between the ending end of the second oil groove and the initial line is d_s2, and the coverage angle of the second oil groove is 360°-(d_s2-d_e2).

2. The connecting rod according to claim 1, wherein: A communication oil passage is formed in the rod body, and the communication oil passage communicates with the inner hole of the first end portion and the inner hole of the second end portion.

3. The connecting rod according to claim 2, wherein: The first oil groove is located on a side of the inner side wall of the first end away from the connecting oil passage; And / or, the second oil groove is located on a side of the inner side wall of the second end portion away from the connecting oil channel.

4. The connecting rod according to any one of claims 1 to 3, characterized in that The coverage angle of the first oil groove satisfies: 120°≤d_e1≤150°, 210°≤d_s1≤240°; And / or, the coverage angle of the second oil groove satisfies: 30°≤d_e2≤60°, 300°≤d_s2≤330°.

5. The connecting rod according to any one of claims 1 to 3, characterized in that The first oil groove includes at least two first groove bodies distributed along the axial direction of the first end portion; And / or, the second oil groove includes at least two second groove bodies distributed along the axial direction of the second end portion.

6. The connecting rod according to claim 5, wherein: Define the height of the first end as H1, the inner diameter of the first end as D1, and the height of the first trough as h1, then: H1 / 4≤h1 <D1 / 2; And / or, define the height of the second end portion as H2, the inner diameter of the second end portion as D2, and the height of the second trough body as h2, then: H2 / 4≤h2 <D2 / 2。 7. The connecting rod according to claim 6, wherein: The distance w1 between two adjacent sections of the first slot body is greater than 2 mm; And / or, the distance w2 between two adjacent sections of the second groove body is greater than 2 mm.

8. The connecting rod according to any one of claims 1 to 3, characterized in that The inner diameter of the first end portion is defined as D1, and the depth of the first oil groove is defined as d1, then: D1 / 300≤d1≤D1 / 200; And / or, the inner diameter of the second end portion is defined as D2, and the depth of the second oil groove is defined as d2, then the following is satisfied: D2 / 300≤d2≤D2 / 200.

9. The connecting rod according to claim 8, wherein: The depth d1 of the first oil groove and / or the depth d2 of the second oil groove is 10 μm to 1000 μm.

10. A pump assembly, characterized in that: include: cylinder; A piston is disposed in the cylinder and is provided with a piston pin; a crankshaft provided with an eccentrically arranged crank; According to any one of claims 1 to 9, the first end portion is sleeved on the crank, the second end portion is inserted into the piston, and the piston pin is passed through the piston and the second end portion.

11. A compressor, characterized in that: Comprising the pump body assembly according to claim 10.

12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.

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