Compression mechanism, scroll compressor and refrigeration equipment

Abstract

The present invention discloses a compression mechanism, a scroll compressor and a refrigeration device, wherein the compression mechanism comprises: a crankshaft, an eccentric portion is provided at one end of the crankshaft, and the crankshaft is provided with a central oil hole penetrating the end face of the eccentric portion; an eccentric sleeve is sleeved on the periphery of the eccentric portion; and a movable scroll assembly, comprising a mirror plate and a bearing provided on one side of the mirror plate, and the bearing sleeve is sleeved on the periphery of the eccentric sleeve; wherein the eccentric sleeve has a first end arranged close to the mirror plate, and the outer periphery of the eccentric sleeve close to the first end is provided with an oil guide groove, and the oil guide groove penetrates the end face of the first end. The technical solution of the present invention can improve the lubrication effect between the eccentric sleeve and the bearing, reduce friction power consumption, and improve reliability.

Description

Technical Field

[0001] The invention relates to the technical field of electromechanical equipment, and in particular to a compression mechanism, a scroll compressor and a refrigeration device. Background Art

[0002] In the related art, the compression mechanism of the scroll compressor includes a crankshaft, an eccentric sleeve and a movable scroll assembly. The eccentric sleeve is arranged on the periphery of the eccentric part of the crankshaft, and the movable scroll assembly is arranged on the periphery of the eccentric sleeve through the bearing sleeve. The movable scroll assembly is driven to move by the cooperation of the eccentric part, the eccentric sleeve and the bearing. The traditional eccentric sleeve is generally provided with a cutting edge on the outer periphery of the eccentric sleeve. When the compressor is running, the lubricating oil coming out of the center oil hole of the crankshaft will lubricate the eccentric part of the crankshaft, the eccentric sleeve and the inner circumference of the bearing. The lubrication between the eccentric sleeve and the bearing mainly relies on the lubricating oil passing through the cutting edge of the outer periphery of the eccentric sleeve and the lubricating oil passing through the gap between the outer circumference of the eccentric sleeve and the inner circumference of the bearing. However, the lubrication effect is usually poor, which makes the friction power consumption between the eccentric sleeve and the bearing large, affecting the reliability of the compressor operation. Summary of the invention

[0003] The main purpose of the present invention is to provide a compression mechanism, which aims to improve the lubrication effect between the eccentric sleeve and the bearing, reduce friction power consumption, and improve reliability.

[0004] To achieve the above object, the compression mechanism proposed by the present invention comprises:

[0005] A crankshaft, wherein an eccentric portion is provided at one end of the crankshaft, and a central oil hole is provided on the crankshaft that passes through an end surface of the eccentric portion;

[0006] An eccentric sleeve, sleeved on the periphery of the eccentric portion; and

[0007] The movable scroll assembly comprises a mirror plate and a bearing arranged on one side of the mirror plate, wherein the bearing sleeve is arranged on the periphery of the eccentric sleeve;

[0008] The eccentric sleeve has a first end arranged close to the mirror plate, and an oil guide groove is arranged on the outer periphery of the eccentric sleeve close to the first end, and the oil guide groove runs through the end surface of the first end.

[0009] In one of the embodiments, the outer peripheral surface of the eccentric sleeve is divided into a load-bearing area and a non-load-bearing area along the circumferential direction, and the oil guide groove is arranged in the non-load-bearing area.

[0010] In one embodiment, a connecting groove is provided at the first end, and the connecting groove connects the inner hole of the eccentric sleeve with the oil guide groove, and the connecting groove is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve and the eccentric part.

[0011] In one embodiment, the cross-sectional area of ​​the connecting groove projected onto the axial cross-section of the eccentric sleeve is S1, wherein S1 ≥ 2 mm 2 .

[0012] In one of the embodiments, in the axial direction of the eccentric sleeve, the height of the eccentric sleeve is h1, and the height of the oil guide groove is h2, wherein 2mm≤h2≤0.5h1.

[0013] In one of the embodiments, in the radial direction of the eccentric sleeve, the thinnest thickness of the eccentric sleeve is t1, and the width of the oil guide groove is t2, wherein 0.2≤t2 / t1≤0.6.

[0014] In one of the embodiments, a cutting edge is provided on the outer periphery of the eccentric sleeve, and a cutting area corresponding to the cutting edge passes through both ends of the eccentric sleeve and is connected to the oil guide groove; the cutting edge is arranged in the direction of the minimum eccentricity of the cooperation between the eccentric sleeve and the eccentric part; and / or, the cutting edge is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve and the eccentric part.

[0015] In one embodiment, the cross-sectional area of ​​the cutting area corresponding to the cutting edge projected onto the radial cross-section of the eccentric sleeve is S2, wherein S2 ≥ 2 mm 2 .

[0016] The present invention also provides a scroll compressor, comprising the compression mechanism as described above.

[0017] The present invention also provides a refrigeration device, comprising the scroll compressor as described above.

[0018] The technical solution of the present invention is to provide an oil guide groove on the outer periphery of the eccentric sleeve near the first end (that is, the end of the eccentric sleeve near the mirror plate), and the oil guide groove penetrates the end face of the first end. After the lubricating oil from the central oil hole of the crankshaft reaches the end face of the first end of the eccentric sleeve, it can smoothly flow into the oil guide groove from the through portion between the oil guide groove and the end face of the first end. By providing the oil guide groove on the outer periphery of the eccentric sleeve, the gap between the eccentric sleeve and the bearing can be increased, so that a large amount of lubricating oil can smoothly enter the oil guide groove and then gradually penetrate into the gaps between the eccentric sleeve and other parts of the bearing, so as to better lubricate the friction pair formed between the outer peripheral surface of the eccentric sleeve and the inner peripheral surface of the bearing, effectively improve the lubrication effect between the eccentric sleeve and the bearing, reduce friction power consumption, and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of a compression mechanism of the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional schematic diagram of the middle compression mechanism in an assembled state;

[0022] Figure 3 for Figure 2 The schematic cross-section diagram along line AA;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the crankshaft of the compression mechanism;

[0024] Figure 5 for Figure 1 A schematic structural diagram of a movable scroll assembly of a compression mechanism;

[0025] Figure 6 It is a structural schematic diagram of a first embodiment of an eccentric sleeve of the present invention;

[0026] Figure 7 for Figure 6 Top view of the middle eccentric sleeve;

[0027] Figure 8 for Figure 7 The schematic cross-section diagram along line BB;

[0028] Fig. 9 It is a structural schematic diagram of a second embodiment of an eccentric sleeve of the present invention;

[0029] Fig.10 for Fig. 9 Top view of the middle eccentric sleeve;

[0030] Fig.11 It is a structural schematic diagram of a third embodiment of an eccentric sleeve of the present invention;

[0031] Fig.12 for Fig.11 Top view of the middle eccentric sleeve;

[0032] Fig.13 for Fig.12 Schematic diagram of the cross section along the CC line;

[0033] Fig.14 for Fig.12 Schematic diagram of the assembly of the middle eccentric sleeve and the crankshaft;

[0034] Fig.15 It is a structural schematic diagram of a fourth embodiment of an eccentric sleeve of the present invention;

[0035] Fig.16 for Fig.15 Top view of the middle eccentric sleeve;

[0036] Fig.17 for Fig.16 Schematic diagram of the assembly of the middle eccentric sleeve and the crankshaft;

[0037] Fig.18 A top view of a fifth embodiment of an eccentric sleeve of the present invention;

[0038] Fig.19 for Fig.18 Schematic diagram of the assembly of the middle eccentric sleeve and the eccentric part of the crankshaft.

[0039] Description of Figure Numbers:

[0040]

[0041]

[0042] 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

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Please refer to Figures 1 to 5 The present invention proposes a compression mechanism 100, which includes an eccentric sleeve 10, a crankshaft 20 and a movable scroll assembly 30. An eccentric portion 21 is provided at one end of the crankshaft 20, and the crankshaft 20 is provided with a central oil hole 201 penetrating the end surface of the eccentric portion 21. The movable scroll assembly 30 includes a mirror plate 31, and movable scroll teeth 32 and bearings 33 respectively arranged on opposite sides of the mirror plate 31. The eccentric sleeve 10 is sleeved on the periphery of the eccentric portion 21, and the bearing 33 is sleeved on the periphery of the eccentric sleeve 10.

[0047] The compression mechanism 100 specifically relates to a compression mechanism 100 of a scroll compressor, and the compression mechanism 100 includes an eccentric sleeve 10, a crankshaft 20 and a movable scroll assembly 30. The crankshaft 20 includes a long shaft 22 and an eccentric portion 21 arranged at one end of the long shaft 22, the center of the eccentric portion 21 is arranged to deviate from the rotation center of the long shaft 22, and the long shaft 22 is used to connect with the motor rotor of the scroll compressor. The long shaft 22 is driven to rotate by the motor, and the eccentric portion 21 can be driven to rotate eccentrically when the long shaft 22 rotates. A central oil hole 201 extending along the axial direction is provided inside the crankshaft 20, and the central oil hole 201 passes through the axial ends of the crankshaft 20, so that the lubricating oil can be transported upward along the central oil hole 201 of the crankshaft 20 and flow out from the end surface of the eccentric portion 21 to lubricate the surrounding parts. The movable scroll assembly 30 is installed at one end of the crankshaft 20 where the eccentric portion 21 is provided. Specifically, a bearing groove is provided on one side of the mirror plate 31 of the movable scroll assembly 30 close to the eccentric portion 21, and a bearing 33 is installed in the bearing groove. The movable scroll assembly 30 is sleeved on the periphery of the eccentric sleeve 10 through the bearing 33, and the eccentric sleeve 10 is sleeved on the periphery of the eccentric portion 21. The eccentric sleeve 10 and the movable scroll assembly 30 can be driven to rotate eccentrically together through the eccentric portion 21 of the crankshaft 20. It can be understood that in order to ensure that the eccentric portion 21 can smoothly transmit the rotational torque to the eccentric sleeve 10, the cross section of the eccentric portion 21 is generally arranged in a polygonal shape, and accordingly, the inner hole 14 of the eccentric sleeve 10 is arranged in a polygonal hole, and there is a certain gap between the outer peripheral surface of the eccentric portion 21 and the inner peripheral surface of the eccentric sleeve 10 for lubricating oil to pass through to lubricate the two. A movable scroll 32 is provided on the side of the mirror plate 31 away from the bearing 33. The movable scroll 32 has a spiral scroll structure. The movable scroll 32 is used to mesh with the static scroll of the compression mechanism 100 to form a compression chamber. When the movable scroll rotates, the static scroll remains stationary, so that the volume of the compression chamber changes continuously to compress the fluid working medium (such as refrigerant).

[0048] In the related art, the outer periphery of the eccentric sleeve is provided with a cutting edge. When the compressor is running, the lubricating oil coming out of the central oil hole of the crankshaft will lubricate the eccentric part of the crankshaft, the eccentric sleeve and the inner peripheral surface of the bearing. The lubrication between the eccentric sleeve and the bearing is mainly carried out by the lubricating oil passing through the cutting edge of the outer periphery of the eccentric sleeve and the lubricating oil passing through the gap between the outer peripheral surface of the eccentric sleeve and the inner peripheral surface of the bearing. When the eccentric sleeve rotates, its outer peripheral surface is divided into a load-bearing area (also known as the load area) and a non-load-bearing area (also known as the non-load area) along the rotation direction. The inventor found that the cutting edge of the eccentric sleeve is generally set at the position of the maximum eccentricity of the crankshaft, so that the cutting edge is behind the load-bearing area of ​​the outer peripheral surface of the eccentric sleeve, and the lubricating oil cannot reach the load-bearing area of ​​the eccentric sleeve in time, resulting in poor lubrication between the eccentric sleeve and the bearing. Based on this, the present invention proposes an eccentric sleeve that can effectively improve the lubrication effect between the eccentric sleeve and the bearing, reduce friction power consumption, and improve reliability. The following mainly illustrates the specific implementation methods of the eccentric sleeve.

[0049] Please refer to Figures 1 to 6 In one embodiment of the present invention, the compression mechanism 100 includes an eccentric sleeve 10, a crankshaft 20 and a movable scroll assembly 30. An eccentric portion 21 is provided at one end of the crankshaft 20, and the crankshaft 20 is provided with a central oil hole 201 penetrating the end surface of the eccentric portion 21; the eccentric sleeve 10 is sleeved on the periphery of the eccentric portion 21; the movable scroll assembly 30 includes a mirror plate 31 and a bearing 33 provided on one side of the mirror plate 31, and the bearing 33 is sleeved on the periphery of the eccentric sleeve 10; wherein the eccentric sleeve 10 has a first end 11 arranged close to the mirror plate 31, and an oil guide groove 12 is provided on the outer periphery of the eccentric sleeve 10 close to the first end 11, and the oil guide groove 12 penetrates the end surface of the first end 11.

[0050] Specifically, in the present embodiment, the eccentric sleeve 10 has an inner hole 14 arranged in a polygonal shape, and the eccentric sleeve 10 is sleeved on the periphery of the eccentric portion 21 of the crankshaft 20 through the inner hole 14. The movable scroll assembly 30 includes a mirror plate 31 and a bearing 33 arranged on one side of the mirror plate 31, and a movable scroll tooth 32 is provided on the side of the mirror plate 31 away from the bearing 33. The movable scroll assembly 30 is sleeved on the periphery of the eccentric sleeve 10 through the bearing 33. The eccentric sleeve 10 has a first end 11 and a second end arranged opposite to each other in the axial direction, wherein the first end 11 is arranged close to the mirror plate 31. An oil guide groove 12 is provided on the outer periphery of the eccentric sleeve 10 close to the first end 11, wherein the oil guide groove 12 may be provided on the entire outer peripheral surface of the eccentric sleeve 10, or the oil guide groove 12 may be provided on only a portion of the outer peripheral surface of the eccentric sleeve 10. For example, as Figure 6 and Figure 7 As shown, the oil guide groove 12 of the eccentric sleeve 10 of the first embodiment is arranged as an annular groove around the outer periphery of the eccentric sleeve 10; Fig. 9 and Fig.10 As shown, the oil guide groove 12 of the eccentric sleeve 10 of the second embodiment is arranged as a semi-annular groove around a part of the outer periphery of the eccentric sleeve 10 (for example, the outer periphery of the non-load-bearing area A2). The oil guide groove 12 extends along the axial direction of the eccentric sleeve 10 to the end surface penetrating the first end 11, so that the lubricating oil coming out of the central oil hole 201 of the crankshaft 20 can smoothly flow into the oil guide groove 12 from the penetration portion between the oil guide groove 12 and the end surface of the first end 11 after reaching the end surface of the first end 11 of the eccentric sleeve 10.

[0051] The technical solution of the present invention is to provide an oil guide groove 12 on the outer periphery of the eccentric sleeve 10 near the first end 11 (that is, the end of the eccentric sleeve 10 near the mirror plate 31), and the oil guide groove 12 penetrates the end surface of the first end 11. After the lubricating oil from the central oil hole 201 of the crankshaft 20 reaches the end surface of the first end 11 of the eccentric sleeve 10, it can smoothly flow into the oil guide groove 12 from the through portion between the oil guide groove 12 and the end surface of the first end 11. By providing the oil guide groove 12 on the outer periphery of the eccentric sleeve 10, the gap between the eccentric sleeve 10 and the bearing 33 can be increased, so that a large amount of lubricating oil can smoothly enter the oil guide groove 12 and then gradually penetrate into the gaps of other parts of the eccentric sleeve 10 and the bearing 33, so as to better lubricate the friction pair formed between the outer peripheral surface of the eccentric sleeve 10 and the inner peripheral surface of the bearing 33, effectively improve the lubrication effect between the eccentric sleeve 10 and the bearing 33, reduce friction power consumption, and improve reliability.

[0052] Please refer to Fig. 9 and Fig.10 In one embodiment, the outer peripheral surface of the eccentric sleeve 10 is divided into a load-bearing area A1 and a non-load-bearing area A2 along the circumferential direction, and the oil guide groove 12 is arranged in the non-load-bearing area A2. It can be understood that when the eccentric sleeve 10 drives the bearing 33 to rotate eccentrically, in the rotation direction of the eccentric sleeve 10, one side of the outer peripheral surface of the eccentric sleeve 10 is the load-bearing area A1 that bears a large load, and the other side is the non-load-bearing area A2. For example, Fig.10 As shown, when the eccentric sleeve 10 rotates clockwise, the area located on the right side of the eccentric sleeve 10 is the load-bearing area A1, and the area located on the left side of the eccentric sleeve 10 is the non-load-bearing area A2.

[0053] In this embodiment, by setting the oil guide groove 12 in the non-load-bearing area A2 of the eccentric sleeve 10, when the lubricating oil in the central oil hole 201 of the crankshaft 20 reaches the end surface of the first end 11, it enters the oil guide groove 12 to lubricate the non-load-bearing area A2, and as the eccentric sleeve 10 rotates, the lubricating oil can enter the gap of the load-bearing area A1 along the oil guide groove 12 for lubrication, so that the outer peripheral surface of the eccentric sleeve and each area of ​​the inner peripheral surface of the bearing 33 can be well lubricated. If the oil guide groove 12 is opened in the load-bearing area A1, the area of ​​the load-bearing area A1 may become smaller, resulting in excessive surface pressure, causing friction and reliability deterioration and other problems; and the gap between the outer peripheral surface of the eccentric sleeve 10 in the load-bearing area A1 and the inner peripheral surface of the bearing 33 is small, and it is difficult for the lubricating oil to enter. Compared with the solution of opening the oil guide groove 12 in the load-bearing area A1, opening the oil guide groove 12 in the non-load-bearing area A2 can achieve a better lubrication effect, and can also better ensure the structural strength of the eccentric sleeve 10 and improve reliability.

[0054] Please refer to Figures 11 to 14In one embodiment, the first end 11 is provided with a connecting groove 13, and the connecting groove 13 connects the inner hole 14 of the eccentric sleeve 10 with the oil guide groove 12, and the connecting groove 13 is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric part 21.

[0055] In this embodiment, a connecting groove 13 is provided at the first end 11 of the eccentric sleeve 10, and the connecting groove 13 passes through the end surface of the first end 11. The connecting groove 13 is arranged in the direction of the maximum eccentricity of the eccentric sleeve 10 and the eccentric portion 21 (that is, as shown in FIG. Fig.14 The lubricating oil coming out of the center oil hole 201 of the crankshaft 20 is thrown toward the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric part 21 under the action of centrifugal force, and then the lubricating oil can be better guided to the oil guide groove 12 through the connecting groove 13, and then flow into the gap between the outer peripheral surface of the eccentric sleeve 10 and the inner peripheral surface of the bearing 33 along the oil guide groove 12, so as to better lubricate the eccentric sleeve 10 and the bearing 33.

[0056] Alternatively, if Fig.11 and Fig.12 As shown, in the third embodiment, the outer peripheral surface of the eccentric sleeve 10 is divided into a load-bearing area A1 and a non-load-bearing area A2 along the circumferential direction, the oil guide groove 12 is arranged in the non-load-bearing area A2, the first end 11 is provided with a connecting groove 13, the connecting groove 13 connects the inner hole 14 of the eccentric sleeve 10 with the oil guide groove 12, and the connecting groove 13 is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric part 21. In this way, the lubricating oil coming out of the center oil hole 201 of the crankshaft 20 is thrown toward the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric part 21 under the action of centrifugal force, and then the lubricating oil can be better guided to the oil guide groove 12 through the connecting groove 13 to lubricate the non-load-bearing area A2, and as the eccentric sleeve 10 rotates, the lubricating oil can enter the gap of the load-bearing area A1 along the oil guide groove 12 for lubrication, so that the outer peripheral surface of the eccentric sleeve and each area of ​​the inner peripheral surface of the bearing 33 can be better lubricated; and opening the oil guide groove 12 in the non-load-bearing area A2 can achieve a better lubrication effect, and at the same time can better ensure reliability.

[0057] Alternatively, if Fig.13 As shown, in one embodiment, the cross-sectional area of ​​the connecting groove 13 projected onto the axial cross-section of the eccentric sleeve 10 is S1, wherein S1 ≥ 2 mm 2 For example, the cross-sectional area S1 of the connecting groove 13 can be set to 2 mm according to actual needs. 2 , 3mm 2 , 4mm 2 By making the cross-sectional area S1 of the connecting groove 13 ≥ 2 mm2 , so that the connecting groove 13 has a larger cross-sectional area, thereby increasing the amount of lubricating oil passing through, so that more lubricating oil can be guided into the oil guide groove 12 to achieve a better lubrication effect.

[0058] Theoretically, the larger the cross-sectional area of ​​the oil guide groove 12, the smoother the lubricating oil flows in the oil guide groove 12. However, if the cross-sectional area of ​​the oil guide groove 12 is too large, the force bearing area of ​​the friction pair formed by the eccentric sleeve 10 and the bearing 33 will be reduced, resulting in excessive surface pressure, abnormal wear and other problems. In order to ensure that the oil guide groove 12 has a suitable cross-sectional area, while ensuring the smooth flow of the lubricating oil, it can also avoid abnormal wear caused by excessive reduction in the force bearing area, such as Figure 8 As shown, in one embodiment, in the axial direction of the eccentric sleeve 10, the height of the eccentric sleeve 10 is h1, and the height of the oil guide groove 12 is h2, wherein 2mm≤h2≤0.5h1. In this way, the height of the oil guide groove 12 h2≥2mm can ensure that the height of the oil guide groove 12 is not too small, thereby ensuring that the oil guide groove 12 has a certain cross-sectional area in the axial direction of the eccentric sleeve 10 to ensure smooth flow of lubricating oil. At the same time, h2≤0.5h1, so that the oil guide groove 12 will not occupy too much height dimension of the eccentric sleeve 10, will not cause abnormal wear caused by excessive reduction of the force bearing area of ​​the eccentric sleeve 10, can effectively ensure the overall structural strength of the eccentric sleeve 10, and ensure reliability. Among them, the specific dimensions of h1 and h2 can be set according to the actual dimensions of the eccentric sleeve 10, and only need to satisfy the above relationship, and no specific limitation is made here.

[0059] In order to ensure that the oil guide groove 12 has a suitable cross-sectional area, while ensuring the smooth flow of lubricating oil, it is also possible to avoid abnormal wear caused by excessive reduction of the force bearing area, such as Figure 8As shown, in one embodiment, in the radial direction of the eccentric sleeve 10, the thinnest thickness of the eccentric sleeve 10 is t1, and the width of the oil guide groove 12 is t2, wherein 0.2≤t2 / t1≤0.6. That is, the ratio of the width t2 of the oil guide groove 12 to the thinnest thickness t1 of the eccentric sleeve 10 is between 0.2 and 0.6. For example, the ratio of the width t2 of the oil guide groove 12 to the thinnest thickness t1 of the eccentric sleeve 10 can be 0.2, 0.3, 0.4, 0.5, 0.6, etc. In this way, 0.2≤t2 / t1 can ensure that the width of the oil guide groove 12 in the radial direction of the eccentric sleeve 10 is not too small, thereby ensuring that the oil guide groove 12 has a certain cross-sectional area in the radial direction of the eccentric sleeve 10 to ensure smooth flow of lubricating oil. At the same time, t2 / t1≤0.6, so that in the radial direction of the eccentric sleeve 10, the oil guide groove 12 will not occupy too much thickness of the eccentric sleeve 10, and will not cause abnormal wear caused by excessive reduction of the force-bearing area of ​​the eccentric sleeve 10, which can effectively ensure the overall structural strength of the eccentric sleeve 10 and ensure reliability. Among them, the specific sizes of t1 and t2 can be set according to the actual size of the eccentric sleeve 10, and only need to satisfy the above relationship, and no specific limitation is made here.

[0060] Please refer to Figures 15 to 19 On the basis of the above embodiment, a cutting edge 15 is provided on the outer periphery of the eccentric sleeve 10, and a cutting area A3 corresponding to the cutting edge 15 passes through both ends of the eccentric sleeve 10 and is connected to the oil guide groove 12; the cutting edge 15 is arranged in the direction of the minimum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21; and / or, the cutting edge 15 is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21.

[0061] In this embodiment, by providing a cutting edge 15 on the outer periphery of the eccentric sleeve 10, when the bearing 33 and the eccentric sleeve 10 are assembled, the cutting area A3 corresponding to the cutting edge 15 forms a larger gap between the outer peripheral surface of the eccentric sleeve 10 and the inner peripheral surface of the bearing 33, so that more lubricating oil can pass through, thereby achieving a better lubrication effect. The cutting edge 15 can be set in the direction of the minimum eccentricity of the eccentric sleeve 10 and the eccentric part 21; or set in the direction of the maximum eccentricity of the eccentric sleeve 10 and the eccentric part 21; or the cutting edge 15 is provided in both the direction of the minimum eccentricity of the eccentric sleeve 10 and the eccentric part 21 and the direction of the maximum eccentricity of the eccentric sleeve 10 and the eccentric part 21.

[0062] like Figures 15 to 17 As shown, in the fourth embodiment, a cutting edge 15 is provided on the outer periphery of the eccentric sleeve 10, and a cutting area A3 corresponding to the cutting edge 15 passes through both ends of the eccentric sleeve 10 and is connected to the oil guide groove 12; the cutting edge 15 is arranged in the direction of the minimum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21.

[0063] In this embodiment, the cutting edge 15 is arranged in the direction of the minimum eccentricity of the eccentric sleeve 10 and the eccentric portion 21 (that is, Fig.17 The crankshaft 20 is shown in the direction of minimum eccentricity, so that the cutting area A3 corresponding to the cutting edge 15 is closest to the load-bearing area A1 of the outer peripheral surface of the eccentric sleeve 10. In this way, as the eccentric sleeve 10 rotates, the lubricating oil in the oil guide groove 12 can flow along the cutting area A3 corresponding to the cutting edge 15 to the load-bearing area A1 of the eccentric sleeve 10, thereby achieving better lubrication for the load-bearing area A1, thereby further improving the lubrication effect between the eccentric sleeve 10 and the bearing 33.

[0064] like Fig.18 and Fig.19 As shown, in the fifth embodiment, two cutting edges 15 are provided on the outer periphery of the eccentric sleeve 10, and the cutting areas A3 corresponding to each of the cutting edges 15 pass through both ends of the eccentric sleeve 10 and are connected to the oil guide groove 12; one of the cutting edges 15 is arranged in the direction of the minimum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21; and the other cutting edge 15 is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21.

[0065] In this embodiment, cutting edges 15 are provided in the direction of the minimum eccentricity of the eccentric sleeve 10 and the eccentric part 21 and in the direction of the maximum eccentricity of the eccentric sleeve 10 and the eccentric part 21. When the eccentric sleeve 10 and the bearing 33 are assembled, the cutting areas A3 corresponding to the two cutting edges 15 can allow more lubricating oil to pass through, so as to further improve the lubrication effect. The lubricating oil coming out of the central oil hole 201 of the crankshaft 20 is thrown to the direction of the maximum eccentricity of the eccentric sleeve 10 and the eccentric part 21 under the action of centrifugal force, and then flows to the oil guide groove 12 after passing through the cutting area A3 corresponding to the cutting edge 15 in the direction of the maximum eccentricity of the crankshaft 20. The lubricating oil in the oil guide groove 12 then flows along the cutting area A3 corresponding to the cutting edge 15 in the direction of the minimum eccentricity of the crankshaft 20 to the bearing area A1 of the eccentric sleeve 10, so that each area of ​​the eccentric sleeve 10 can be well lubricated. Optionally, in this embodiment, a connecting groove 13 is further provided in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21. The lubricating oil coming out of the central oil hole 201 of the crankshaft 20 is thrown toward the direction of the maximum eccentricity of the cooperation between the eccentric sleeve 10 and the eccentric portion 21 under the action of centrifugal force, and then the lubricating oil can be better guided to the oil guide groove 12 and the cutting area A3 corresponding to the cutting edge 15 in the direction of the maximum eccentricity of the crankshaft 20 through the connecting groove 13, so as to achieve better lubrication effect.

[0066] like Fig.16 As shown, in one embodiment, the cross-sectional area of ​​the cutting area A3 corresponding to the cutting edge 15 projected onto the radial cross-section of the eccentric sleeve 10 is S2, wherein S2 ≥ 2 mm2 For example, the cross-sectional area S2 of the cutting area A3 corresponding to the cutting edge 15 can be set to 2 mm according to actual needs. 2 , 3mm 2 , 4mm 2 By making the cutting area A3 corresponding to the cutting edge 15 have a cross-sectional area S2 ≥ 2 mm 2 , so that the cutting area A3 corresponding to the cutting edge 15 has a larger cross-sectional area, thereby increasing the amount of lubricating oil passing through, so that more lubricating oil can be guided into the gap between the eccentric sleeve 10 and the bearing 33 to achieve a better lubrication effect.

[0067] The present invention also proposes a scroll compressor, which includes a compression mechanism 100. The specific structure of the compression mechanism 100 refers to the above-mentioned embodiment. Since the scroll 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.

[0068] The present invention also provides a refrigeration device, which includes a scroll compressor. The specific structure of the scroll compressor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the refrigeration device includes but is not limited to air conditioners, refrigerators, freezers, heat pumps, etc.

[0069] The above description is only a preferred 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 inventive 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 compression mechanism, characterized in that: include: A crankshaft, wherein an eccentric portion is provided at one end of the crankshaft, and a central oil hole is provided on the crankshaft that passes through an end surface of the eccentric portion; An eccentric sleeve, sleeved on the periphery of the eccentric part; as well as The movable scroll assembly comprises a mirror plate and a bearing arranged on one side of the mirror plate, wherein the bearing sleeve is arranged on the periphery of the eccentric sleeve; The eccentric sleeve has a first end disposed close to the mirror plate, and an oil guide groove is disposed on the outer periphery of the eccentric sleeve close to the first end, and the oil guide groove runs through the end surface of the first end; The first end is provided with a connecting groove, the connecting groove connects the inner hole of the eccentric sleeve with the oil guide groove, and the connecting groove is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve and the eccentric part; A cutting edge is provided on the outer periphery of the eccentric sleeve, and a cutting area corresponding to the cutting edge passes through both ends of the eccentric sleeve and is connected to the oil guide groove; the cutting edge is arranged in the direction of the minimum eccentricity of the cooperation between the eccentric sleeve and the eccentric part; and / or, the cutting edge is arranged in the direction of the maximum eccentricity of the cooperation between the eccentric sleeve and the eccentric part.

2. The compression mechanism according to claim 1, characterized in that: The outer peripheral surface of the eccentric sleeve is divided into a load-bearing area and a non-load-bearing area along the circumferential direction, and the oil guide groove is arranged in the non-load-bearing area.

3. The compression mechanism according to claim 1, characterized in that: The cross-sectional area of ​​the connecting groove projected onto the axial cross-section of the eccentric sleeve is S1, where S1≥2mm 2 .

4. The compression mechanism according to claim 1, characterized in that: In the axial direction of the eccentric sleeve, the height of the eccentric sleeve is h1, and the height of the oil guide groove is h2, wherein 2mm≤h2≤0.5h1.

5. The compression mechanism according to claim 1, characterized in that: In the radial direction of the eccentric sleeve, the thinnest thickness of the eccentric sleeve is t1, and the width of the oil guide groove is t2, wherein 0.2≤t2 / t1≤0.

6.

6. The compression mechanism according to claim 1, characterized in that: The cross-sectional area of ​​the cutting area corresponding to the cutting edge projected onto the radial cross-section of the eccentric sleeve is S2, where S2≥2mm 2 .

7. A scroll compressor, characterized in that: Comprising a compression mechanism as described in any one of claims 1 to 6.

8. A refrigeration device, characterized in that: Comprising the scroll compressor as claimed in claim 7.

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