WO2020073640A1

WO2020073640A1 - Self-lubricating scroll compressor and static plate thereof

Info

Publication number: WO2020073640A1
Application number: PCT/CN2019/084237
Authority: WO
Inventors: 丁涛; 易丰收; 邹傲
Original assignee: 南京奥特佳新能源科技有限公司
Priority date: 2018-10-11
Filing date: 2019-04-25
Publication date: 2020-04-16
Also published as: CN109209868A

Abstract

Disclosed is a self-lubricating scroll compressor, comprising a static plate (1) and a movable plate (2) meshing together, and a housing (3) by means of which the static plate (1) and the movable plate (2) are mounted together, wherein an exhaust passage (31) is arranged above the housing (3); an inner side of the static plate (1) is provided with an air sucking cavity, the centre of the static plate (1) is provided with an exhaust hole, an oil return groove (13) is processed on a back face of the static plate (1), with the oil return groove (13) being an annular groove, and an oil guide hole (14) in communication with the air sucking cavity is provided above the back face of the static plate (1), with the oil guide hole (14) being located at a position of an inner side of the oil return groove (13), and a plane where the oil guide hole (14) is located is lower than a plane where the oil return groove (13) is located. The oil return groove (13) guides lubricating oil from the lower portion of the housing (3) to the upper portion of the housing (3), thereby improving the lubrication of various components inside the upper portion of the housing (3).

Description

Self-lubricating scroll compressor and its static disk

Technical field

The invention relates to a self-lubricating scroll compressor and its static disk, which belong to the technical field of compressors.

Background technique

The scroll compressor is a volumetric compression compressor. The compression component is composed of a fixed involute scroll and an involute moving scroll with eccentric orbital translation. These two scrolls They are static disk and moving disk. The working principle of the scroll compressor is to use the relative orbital motion of the dynamic and static scrolls to form a continuous change in the enclosed volume to achieve the purpose of compressing the gas.

The structure of the prior art scroll compressor is shown in FIGS. 1 and 2, which includes a housing and a stationary disk 1 and a movable disk 2 that are meshed together, and the stationary disk 1 and the movable disk 2 are installed in the housing 3 At the same time, when the compressor is running, the moving disk 2 makes a rotating motion with the center of the stationary disk 1 as the rotation center, and the gaseous refrigerant is gradually pushed toward the center space of the moving disk 2 and the stationary disk 1, the volume of the gaseous refrigerant is continuously shrinking, and the pressure is increasing Eventually, it becomes a high-temperature and high-pressure state, and is finally discharged from the exhaust port 11 in the center of the stationary disk 1, and finally discharged from the exhaust passage 31 on the casing 3 to the outside of the compressor. Since the compressor is in use, in order to reduce the friction of each part, usually lubricating oil is used to lubricate each moving part. When the compressor is exhausting, a part of the lubricating oil will be discharged from the exhaust port 11 on the static plate 1 with high-pressure gas. In order to prevent the lubricating oil from being discharged outside the casing, an oil branch pipe 32 is provided on the exhaust passage in the casing 3, and the lubricating oil in the gas will return to the bottom of the casing 3 under the action of the oil branch pipe 32, the static disk 1 The bottom of the housing is provided with an oil return hole 12, and the bottom of the housing 3 is provided with an oil return capillary 33 connected to the oil return hole. Due to the small diameter of the oil return capillary 33, it can function as a throttle, and the lubricating oil is throttled by the oil return capillary 33 After the backflow to the inside of the static disk 2 below the suction chamber, the path shown by the arrow in FIG. 1 is the oil return path. The lubrication structure of the prior art scroll compressor has the following disadvantages: (1) The lubricating oil can only be returned to the lower part of the suction chamber, and the parts above the components in the compressor housing cannot be effectively lubricated, thus resulting in a lubricating effect difference. (2) An additional oil return capillary is installed, which leads to an increase in compressor parts, and the small size of the oil return capillary requires high processing accuracy and high processing cost.

Summary of the invention

The purpose of the present invention is to provide a self-lubricating scroll compressor with good lubricating effect and reduced cost, to solve the technical problem of the poor lubricating effect of the prior art compressor and the additional processing of the oil return capillary, resulting in high processing cost. At the same time, the invention also provides a static disk in a self-lubricating scroll compressor.

The self-lubricating scroll compressor of the present invention adopts the following technical scheme: A self-lubricating scroll compressor includes a stationary disk and a moving disk that are meshed together, and a housing that mounts the stationary disk and the moving disk together, above the housing There is an exhaust channel, the inner side of the static plate is an air suction cavity, and the center of the static plate is provided with an exhaust hole. The oil guide hole communicating with the suction chamber is located at a position inside the oil return groove, and the plane of the oil guide hole is lower than the plane of the oil return groove.

Below the back of the static plate, there is a filter slot interlaced with the oil return slot, and the edge of the filter slot closely adheres to the oil return slot.

The number of the filter tanks is more than two, and the filter tanks are arranged vertically and located inside the oil return tank.

A ring-shaped protrusion is provided on the back of the static disk along the outer edge of the static disk, and the oil return groove is opened at the root position inside the ring-shaped protrusion.

The circle center of the oil return groove and the static plate are arranged concentrically.

The static disk in the self-lubricating scroll compressor of the present invention adopts the following technical solution: a static disk in the self-lubricating scroll compressor, an inner side of which is an air suction cavity, and an exhaust hole at the center of the static disk The back of the machine is processed with an oil return groove. The oil return groove is an annular groove. An oil guide hole communicating with the suction chamber is provided above the back surface of the static plate. The oil guide hole is located at a position inside the oil return groove. Below the plane where the oil return groove is located, a filter groove staggered with the oil return groove is provided below the back of the static plate, and the edge of the filter groove closely adheres to the oil return groove.

The beneficial effects of the present invention are: the present invention improves the zeros in the upper part of the housing by machining an extremely small annular groove on the back of the static plate, that is, the oil return groove, through which the lubricating oil is guided from the lower part of the housing to the upper part of the housing For the lubrication of components, the lubricating oil is guided from the oil return groove to the upper part of the static plate, and then introduced into the compression suction chamber through the oil guide hole to realize the self-lubricating effect of the compressor. The invention can eliminate the oil return capillary in the compressor of the prior art by designing oil return grooves with different lengths and cross-sectional areas so that its throttling effect is equivalent to the capillary. The present invention uses the method of machining the annular groove to reduce the number of parts and reduce the cost; at the same time, the oil guide hole is provided above the static plate, which can effectively lubricate the upper part of the compressor, thereby improving The lubrication effect of the compressor.

Preferably, when the lubricating oil flows in the oil return tank, the filter tank at the lower part of the back of the static plate can filter the lubricating oil to prevent impurities from entering the compressor suction chamber, and at the same time, the filter tank divides the oil return tank into two parts. The oil return grooves on both sides of the filter tank are introduced into the static plate and the upper part of the casing.

Preferably, the filter tank is arranged vertically and located at an inner position of the oil return tank, which is advantageous for filtering the returned lubricating oil.

Preferably, the oil return groove is provided at the root of the annular protrusion at the edge of the static disk, so that the lubricating oil can be easily accumulated in the oil return groove, so that the lubrication effect is better, and the throttling effect can be achieved by changing the shape and area of the oil return groove processing .

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a scroll compressor in the prior art;

2 is a schematic diagram of the back of the static disk in FIG. 1;

3 is a schematic structural view of an embodiment of a self-lubricating scroll compressor of the present invention;

4 is a schematic diagram of the back of the static disk in FIG. 3;

FIG. 5 is a schematic diagram of the oil return groove in FIG. 3.

In the picture: 1- static plate, 11- exhaust port, 12- oil return hole, 13- oil return groove, 14- oil guide hole, 15- filter groove, 16- annular protrusion, 2- dynamic plate, 3- shell Body, 31- exhaust channel, 32- oil branch, 33- return oil capillary.

detailed description

The present invention will be described in detail below with reference to the drawings and specific embodiments.

The structure of an embodiment of the self-lubricating scroll compressor of the present invention is shown in FIGS. 3 to 5. The self-lubricating scroll compressor of this embodiment includes a stationary disk 1 and a movable disk 2 that are meshed together and a stationary disk 1 and the housing 3 installed together with the moving disk 2, the housing 3 is provided with an exhaust passage 31, the exhaust passage 31 is provided with an oil branch, the inner side of the static disk 1 is an suction chamber, and the center of the static disk 1 is provided with an exhaust A hole 11 is formed on the back of the static plate 1 with an oil return groove 13. The oil return groove 13 is an annular groove, and the center of the oil return groove 15 is concentric with the static plate 1. In this embodiment, a ring-shaped protrusion 16 is provided on the back of the static plate 1 along the outer edge of the static plate, and the oil return groove 13 is opened at the root position inside the ring-shaped protrusion 16.

An oil guide hole 14 communicating with the suction chamber is provided above the back of the static plate 1. The oil guide hole 14 is located at a position inside the oil return groove 13. The plane of the oil guide hole 14 is lower than the plane of the oil return groove 13.

Below the back surface of the static plate 1, a filter groove 15 staggered with the oil return groove 13 is provided, and the edge of the filter groove 15 is closely attached to the oil return groove 13. The number of the filter tanks 15 is more than two. The filter tanks 15 are arranged vertically and located at the inner side of the oil return tank 13.

In this embodiment, a very small annular groove, that is, an oil return groove, is formed at the root of the annular protrusion at the edge of the static disk, so that the lubricating oil is accumulated in the oil return groove, and the lubricating oil is guided from the lower part of the housing to the oil return groove The upper part of the casing improves the lubrication of various parts in the upper part of the casing. After the lubricating oil is guided from the oil return groove to the upper part of the static plate, it is introduced into the compressed suction chamber through the oil guide hole. The invention can eliminate the oil return capillary in the compressor of the prior art by designing oil return grooves with different lengths and cross-sectional areas so that its throttling effect is equivalent to the capillary. When the lubricating oil flows in the oil return tank, the filter tank at the lower part of the back of the static plate can filter the lubricating oil to prevent impurities from entering the compressor suction chamber. At the same time, the filter tank divides the oil return tank into two parts, and the lubricating oil can be separated from the filter tank. The oil return groove on the side is introduced into the upper part of the static plate and the housing. The present invention uses the method of machining the annular groove to reduce the number of parts and reduce the cost; at the same time, the oil guide hole is provided above the static plate, which can effectively lubricate the upper part of the compressor, thereby improving The lubrication effect of the compressor.

The structure of the static disk in the self-lubricating scroll compressor of the present invention is shown in FIG. 4. The structure of the static disk in this embodiment is the same as the structure of the static disk in the embodiment of the self-lubricating scroll compressor of the present invention, which will not be repeated here.

The above embodiment is a preferred embodiment of the present invention. In other embodiments of the present invention, an annular protrusion may not be provided on the edge of the static disk, and an annular oil return groove may be directly opened on the back of the static disk.

In other embodiments of the present invention, the position and number of filter tanks can be flexibly set according to actual needs.

Claims

A self-lubricating scroll compressor includes a stationary disk (1) and a movable disk (2) meshed together, and a casing (3) for mounting the stationary disk (1) and the movable disk (2) together, the casing (3) There is an exhaust channel (31) above, the inside of the static disk (1) is the suction chamber, and the center of the static disk (1) is provided with an exhaust hole (11), characterized in that the static disk (1) The back of the machine is processed with an oil return groove (13). The oil return groove (13) is an annular groove. Above the back of the static plate (1), an oil guide hole (14) communicating with the suction chamber is provided. ) Is located inside the oil return groove (13), the plane of the oil guide hole (14) is lower than the plane of the oil return groove (13).
The self-lubricating scroll compressor according to claim 1, characterized in that: a filter groove (15) staggered with the oil return groove (13) is provided below the back surface of the static plate (1), and the filter groove (15) The edge of the is pressed against the oil groove (13).
The self-lubricating scroll compressor according to claim 2, characterized in that: the number of the filter grooves (15) is more than two, and the filter grooves (15) are vertically arranged and located at an inner position of the oil return groove (13) .
The self-lubricating scroll compressor according to claim 1 or 2 or 3, characterized in that: a ring-shaped protrusion (16) is provided along the outer edge of the static plate on the back surface of the static plate (1), and the oil return groove (13) Open at the root position inside the annular protrusion (16).
The self-lubricating scroll compressor according to claim 1 or 2 or 3, characterized in that the circle center of the oil return groove (15) is concentrically arranged with the stationary disk (1).
A static disk in a self-lubricating scroll compressor, the inner side of which is an air suction cavity, and an exhaust hole is provided at the center, characterized in that: an oil return groove (13) is formed on the back of the static disk (1). The oil groove (13) is an annular groove, and an oil guide hole (14) communicating with the suction chamber is provided above the back of the static plate (1), and the oil guide hole (14) is located at a position inside the oil return groove (13) , The plane of the oil guide hole (14) is lower than the plane of the oil return groove (13).
The static disk in the self-lubricating scroll compressor according to claim 6, characterized in that: a filter groove (15) staggered with the oil return groove (13) is provided below the back surface of the static disk (1) to filter The edge of the groove (15) is close to the oil return groove (13).
The static disk in the self-lubricating scroll compressor according to claim 7, characterized in that the number of the filter grooves (15) is more than two, and the filter grooves (15) are vertically arranged and located in the oil return groove (13) ) Inside position.
The stationary disk in a self-lubricating scroll compressor according to claim 6 or 7 or 8, characterized in that: a ring-shaped protrusion (16) is provided on the back of the stationary disk (1) along the outer edge of the stationary disk, The oil return groove (13) is opened at the root position inside the annular protrusion (16).
The stationary disk in a self-lubricating scroll compressor according to claim 6 or 7 or 8, characterized in that the center of the circle of the oil return groove (13) and the stationary disk (1) are arranged concentrically.