CN113883058A

CN113883058A - Scroll compressor

Info

Publication number: CN113883058A
Application number: CN202111326963.7A
Authority: CN
Inventors: 陈松; 丁涛; 陈祥吉; 刘爱军
Original assignee: Nanjing Aotecar Refrigeration Co ltd; Nanjing Aotecar New Energy Technology Co ltd
Current assignee: Nanjing Aotecar Refrigeration Co ltd; Nanjing Aotecar New Energy Technology Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-01-04

Abstract

The invention relates to the technical field of compressors, in particular to a scroll compressor, which comprises a shell, a main shaft, an eccentric sleeve and an eccentric turbine assembly, wherein the main shaft is rotationally connected with the shell; the movable scroll disk is connected with the eccentric sleeve, and the movable scroll disk is engaged with the fixed scroll disk to form a plurality of chambers. In the invention, the boss is arranged on one side of the central part of the scroll of the fixed scroll close to the end surface of the fixed scroll, and the sunken groove is arranged on the boss, so that in the exhaust process, gas in a compression cavity formed by the central part of the scroll of the fixed scroll and the central part of the scroll of the movable scroll can be released to an exhaust port and a cavity with lower adjacent pressure through the sunken groove, so that the pressure difference between two sides of the central part of the scroll is smaller, the shaking and deformation are smaller, and the operation is more stable.

Description

Scroll compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a scroll compressor.

Background

The scroll compressor is a positive displacement compressor, and the compression part consists of a movable scroll and a fixed scroll. The main shaft drives the movable scroll through the eccentric sleeve to move, and when the existing scroll compressor compresses gas in the working process, because the pressure difference between two sides of the central part of the scroll is large, the scroll compressor shakes obviously in the running process, and the running stability is low.

Disclosure of Invention

The invention aims to provide a scroll compressor which is compact in structure, convenient to install, stable in operation process and better in performance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a scroll compressor comprising a housing, a main shaft rotatably connected to the housing, an eccentric sleeve and an eccentric turbine assembly, one end of the main shaft being connected to the eccentric sleeve, the eccentric turbine assembly comprising:

the fixed scroll disk is fixedly connected with the shell, a boss is arranged at one side of the central part of the fixed scroll disk scroll close to the end face of the fixed scroll disk, and a sunk groove is formed in the boss;

an orbiting scroll connected to the eccentric sleeve, and engaged with the fixed scroll to form a plurality of chambers.

Preferably, the scroll compressor further comprises a balance weight connected to an end of the main shaft near the eccentric sleeve, the balance weight including a first semi-cylinder and a second semi-cylinder having a stepped shape, and axes of the first semi-cylinder and the second semi-cylinder coincide with each other.

Preferably, the first semi-cylinder and the second semi-cylinder have different thicknesses.

Preferably, a counterweight cavity is arranged at a position of the front cover of the shell corresponding to the counterweight and is used for accommodating the counterweight.

Preferably, the counterweight cavity comprises a first counterweight cavity and a second counterweight cavity which are arranged in a step shape, the first counterweight cavity is used for containing the first semi-cylinder, and the second counterweight cavity is used for containing the second semi-cylinder.

Preferably, the housing is provided with an air suction hole, the front cover is provided with a first air guide groove, and the first air guide groove is communicated with the air suction hole.

Preferably, an oldham ring is arranged between the movable scroll and the front cover and used for preventing the movable scroll from rotating.

Preferably, a wear-resistant plate is interposed between the oldham ring and the orbiting scroll.

Preferably, the wear-resistant plate is provided with a second air guide groove corresponding to the first air guide groove, and the second air guide groove is communicated with the first air guide groove.

Preferably, the main shaft is provided with a main shaft pin hole and a positioning column, the eccentric sleeve is provided with an adjusting pin and a positioning hole, the adjusting pin can be matched with the main shaft pin hole, the positioning column is matched with the positioning hole, an adjusting sleeve is clamped between the main shaft pin hole and the adjusting pin, and the adjusting sleeve is an elastic adjusting sleeve, so that the adjusting pin can be slightly adjusted left and right around the positioning column of the main shaft.

The invention has the beneficial effects that:

in the invention, the boss is arranged on one side of the central part of the scroll of the fixed scroll close to the end surface of the fixed scroll, and the sunken groove is arranged on the boss, so that in the exhaust process, gas in a compression cavity formed by the central part of the scroll of the fixed scroll and the central part of the scroll of the movable scroll can be released to an exhaust port and a cavity with lower adjacent pressure through the sunken groove, so that the pressure difference between two sides of the central part of the scroll is smaller, the shaking and deformation are smaller, and the operation is more stable.

Drawings

FIG. 1 is a schematic view of a scroll compressor arrangement provided by the present invention;

FIG. 2 is a schematic view of a static turbine configuration provided by the present invention;

FIG. 3 is a schematic view of a balance weight first perspective structure provided by the present invention;

FIG. 4 is a schematic view of a second perspective of the counterweight provided by the present invention;

FIG. 5 is a schematic view of a first perspective structure of the front cover according to the present invention;

FIG. 6 is a schematic view of a second perspective structure of the front cover according to the present invention;

fig. 7 is a schematic view of the structure of the wear-resistant plate provided by the invention.

In the figure:

1. a housing; 11. a front cover; 111. a counterweight chamber; 1111. a first weight chamber; 1112. a second weight chamber; 112. a first gas guiding groove;

2. a main shaft;

3. an eccentric sleeve;

4. a static scroll pan; 41. a fixed scroll wrap central portion; 42. a boss; 421. sinking a groove;

5. a movable scroll pan;

6. a counterweight; 61. a first half cylinder; 62. a second semi-cylinder; 63. avoiding holes; 64. an assembly hole;

7. a cross slip ring;

8. a wear resistant sheet; 81. a second air guide groove.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 7, the present embodiment provides a scroll compressor, which includes a housing 1, a driving motor disposed in the housing 1, a transmission assembly, and an eccentric turbine assembly, wherein the transmission assembly includes a main shaft 2 and an eccentric sleeve 3, the main shaft 2 is rotatably connected to the housing 1 through a main shaft bearing, an input end of the main shaft 2 is connected to an output end of the driving motor, an output end of the main shaft 2 is connected to the eccentric turbine assembly through the eccentric sleeve 3, the eccentric turbine assembly includes a movable scroll 5 connected to the eccentric sleeve 3 and a fixed scroll 4 fixedly connected to the housing 1, and the movable scroll 5 and the fixed scroll 4 are engaged to form a plurality of chambers. Specifically, the central portion 41 of the fixed scroll wrap is thickened, and a boss 42 is provided at a side close to the end face of the fixed scroll 4, and a sink 421 is provided on the boss 42. In the exhaust process, the gas in the compression cavity formed by the central part 41 of the fixed scroll wrap and the central part of the movable scroll wrap can be discharged to an exhaust port and a cavity with lower adjacent pressure through the sink 421, so that the pressure difference between two sides of the central part of the wrap is smaller, the shaking and deformation are smaller, and the operation is more stable.

As shown in fig. 3 to 4, the scroll compressor of the present embodiment further includes a balance weight 6, the balance weight 6 is connected to a side of the main shaft 2 near the eccentric sleeve 3, the balance weight 6 includes a first semi-cylindrical column 61 and a second semi-cylindrical column 62 having a step shape, axes of the first semi-cylindrical column 61 and the second semi-cylindrical column 62 are coincident, and thicknesses of the first semi-cylindrical column 61 and the second semi-cylindrical column 62 are different. Specifically, the present embodiment provides a balancing weight 6 in which the first semi-cylindrical column 61 has a cross-sectional radius of R11, and the first semi-cylindrical column 61 has a thickness of H11; the cross-sectional radius of the second semi-cylinder 62 is R12, and the thickness of the second semi-cylinder 62 is H12. More specifically, the embodiment provides the balance weight 6 having both opposite sides trimmed, so that the scroll compressor is more compact, smaller in size, lighter in weight, and more convenient to install, wherein the distance between the two end surfaces where the trimming is performed is L1, and L1 > 2 × R12.

To match with the counterweight 6, as shown in fig. 5-6, the housing 1 of the present embodiment is provided with a counterweight cavity 111 at a position corresponding to the counterweight 6 on the front cover 11 for accommodating the counterweight 6, specifically, the counterweight cavity 111 includes a first counterweight cavity 1111 and a second counterweight cavity 1112 arranged in a step shape, wherein the first counterweight cavity 1111 has a depth H21 for accommodating the first semi-cylinder 61; the depth of the second counterweight cavity 1112 is H22 for accommodating the second semi-cylinder 62, the radius of the first counterweight cavity 1111 is R21, corresponding to the trimming design of the counterweight 6, the counterweight cavity 111 is also provided with a corresponding structure, and the distance between the two side walls corresponding to the trimming is L2, so as to ensure that the counterweight 6 does not collide with the front cover 11, L2 > L1, R21 > R11, H21 > H11, and H22 > H12.

The main shaft 2 and the eccentric sleeve 3 that this embodiment provided are equipped with main shaft pinhole and reference column on the main shaft 2, are equipped with adjusting pin and locating hole on the eccentric sleeve 3, and wherein the adjusting pin can cooperate with the main shaft pinhole, and the reference column can cooperate with the locating hole, because balanced heavy 6 sets up between main shaft 2 and eccentric sleeve 3, so except being provided with pilot hole 64 on balanced heavy 6, still be equipped with and dodge hole 63. In the assembling process, the bolt penetrates through the assembling hole 64 to connect the balance weight 6 to the spindle 2, meanwhile, the positioning column penetrates through the avoiding hole 63 to be assembled in the positioning hole, the adjusting pin is assembled with the spindle pin hole to complete the assembly of the eccentric sleeve 3 and the spindle 2, and finally, the retainer ring is used for limiting the eccentric sleeve 3 to prevent the eccentric sleeve 3 from moving along the axial direction.

Furthermore, an adjusting sleeve is arranged between the main shaft pin hole and the adjusting pin, and the adjusting pin on the eccentric sleeve 3 can be slightly adjusted left and right around the positioning column of the main shaft 2 by utilizing the elasticity of the adjusting sleeve, so that the eccentric amount of the main shaft 2 is adjusted, the processing is convenient and the cost is lower.

Further, an oldham ring 7 is arranged between the movable scroll disk 5 and the front cover 11 and is used for preventing the rotation of the movable scroll disk 5, a wear-resistant plate 8 is clamped between the oldham ring 7 and the movable scroll disk 5, it should be noted that air guide grooves are respectively formed in the front cover 11 and the wear-resistant plate 8, specifically, a first air guide groove 112 is formed in the front cover 11, a second air guide groove 81 is formed in the wear-resistant plate 8 to form a channel for sucking air flow, and air sucked from the suction hole in the housing 1 sequentially passes through the first air guide groove 112 and the second air guide groove 81 and then enters the compression cavity, so that the suction volume is sufficient, the pressure loss is small, and the performance and the reliability of the scroll compressor are improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a scroll compressor, includes casing (1), with casing (1) rotate main shaft (2) of being connected, eccentric cover (3) and eccentric turbine subassembly, the one end of main shaft (2) connect in eccentric cover (3), its characterized in that, eccentric turbine subassembly includes:

the fixed scroll (4) is fixedly connected with the shell (1), a boss (42) is arranged on one side, close to the end face of the fixed scroll (4), of the central part (41) of the fixed scroll wrap, and a sunk groove (421) is formed in the boss (42);

an orbiting scroll (5), the orbiting scroll (5) being connected to the eccentric sleeve (3), and the orbiting scroll (5) being engaged with the fixed scroll (4) to form a plurality of chambers.

2. The scroll compressor according to claim 1, further comprising a balance weight (6), the balance weight (6) being connected to an end of the main shaft (2) near the eccentric sleeve (3), the balance weight (6) comprising a first semi-cylinder (61) and a second semi-cylinder (62) having a stepped shape, an axis of the first semi-cylinder (61) and an axis of the second semi-cylinder (62) being coincident.

3. The scroll compressor of claim 2, wherein the first semi-cylinder (61) and the second semi-cylinder (62) are of different thicknesses.

4. A scroll compressor according to claim 2, wherein the front cover (11) of the housing (1) is provided with a counterweight chamber (111) in a position corresponding to the counterweight (6) for accommodating the counterweight (6).

5. The scroll compressor of claim 4, wherein the counterweight chamber (111) comprises a first counterweight chamber (1111) and a second counterweight chamber (1112) arranged in a stepped manner, the first counterweight chamber (1111) is used for accommodating the first semi-cylinder (61), and the second counterweight chamber (1112) is used for accommodating the second semi-cylinder (62).

6. The scroll compressor of claim 4, wherein the housing (1) has a suction hole, the front cover (11) has a first air guide groove (112), and the first air guide groove (112) is communicated with the suction hole.

7. A scroll compressor according to claim 6, wherein an oldham ring (7) is provided between the orbiting scroll (5) and the front cover (11) for preventing the orbiting scroll (5) from rotating.

8. A scroll compressor according to claim 7, wherein a wear plate (8) is sandwiched between the oldham ring (7) and the orbiting scroll (5).

9. The scroll compressor of claim 8, wherein a second air guide groove (81) is formed in the wear-resistant plate (8) at a position corresponding to the first air guide groove (112), and the second air guide groove (81) is communicated with the first air guide groove (112).

10. The scroll compressor according to any one of claims 1 to 9, wherein the main shaft (2) is provided with a main shaft pin hole and a positioning column, the eccentric sleeve (3) is provided with an adjusting pin and a positioning hole, the adjusting pin is capable of being matched with the main shaft pin hole, the positioning column is matched with the positioning hole, an adjusting sleeve is clamped between the main shaft pin hole and the adjusting pin, and the adjusting sleeve is an elastic adjusting sleeve so that the adjusting pin can be slightly adjusted left and right around the positioning column of the main shaft (2).