CN214698328U

CN214698328U - Low-oil-quantity rotary compressor

Info

Publication number: CN214698328U
Application number: CN202121194265.1U
Authority: CN
Inventors: 邹红; 秦道乾; 胡亮; 梁满仓; 欧阳明芳
Original assignee: Huangshi Donper Compressor Co Ltd
Current assignee: Huangshi Donper Compressor Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-12
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a low-oil rotary compressor, which comprises a shell, a motor and a compression device, wherein the motor and the compression device are both positioned in the shell; a crankshaft is connected between the compression device and the motor; the compression device comprises an air cylinder and a piston arranged in the air cylinder, wherein a sliding sheet groove is formed in the inner side wall of the air cylinder, a sliding sheet is arranged in the sliding sheet groove, one end, extending out of the sliding sheet groove, of the sliding sheet abuts against the outer peripheral wall of the piston, a bearing for rotatably supporting the crankshaft is arranged at the upper end of the air cylinder, an oil hole is formed in the peripheral wall of the crankshaft, a spiral oil groove and an annular groove corresponding to the oil hole are formed in the inner side wall of the bearing, and an oil discharge hole is formed in the side wall of the bearing; the tail end of the spiral oil groove is communicated with the ring groove, and the oil discharge hole is communicated with the ring groove; the oil discharge hole is communicated with the slide sheet groove through the guide pipe. The utility model can reduce the oil filling amount in the rotary compressor and solve the lubrication problem at the slide groove; the problem that lubricating oil occupies the exhaust passage of the compressor can be avoided, and oil discharge of the compressor is improved.

Description

Low-oil-quantity rotary compressor

Technical Field

The utility model belongs to the technical field of rotary compressor, concretely relates to low oil mass rotary compressor.

Background

Sliding vane lubrication has been a difficult problem in rotary compressors. To solve this problem, it is necessary that the minimum oil level of the lubricant in the rotary compressor must be maintained above the bottom of the vane.

For example, the utility model with patent application number 202020863165.2 discloses a rotary compressor, which comprises a shell and a core, wherein the core comprises a pump body, a stator, a rotor, a crankshaft and a silencing cavity, and a liquid storage device is arranged outside the shell. The pump body is including cylinder, upper cylinder cover flange, lower cylinder cover flange and piston, still be equipped with the gleitbretter groove on the cylinder, the gleitbretter inslot is equipped with the gleitbretter. The minimum oil level of the lubricant oil in the rotary compressor must be maintained above the vane bottom. So that the compressor can be normally operated.

During the operation of the rotary compressor, lubricating oil is pumped to the space between the friction pairs through the crankshaft, and the lubricating oil can carry heat and abrasive dust out of the space between the friction pairs so as to reduce abrasion and wear. When the compressor runs, the oil level of lubricating oil in the rotary compressor is gradually lowered and is lower than that of the oil level when the compressor is static, so that insufficient lubrication between the sliding vane and the sliding vane groove can be caused, even the phenomenon of dry friction between the sliding vane and the sliding vane groove occurs, and the abrasion of the compressor is aggravated and even the compressor is blocked. Although the increase of the amount of the lubricant oil can solve the above problems, the excessive increase of the amount of the lubricant oil not only causes the cost increase of the rotary compressor, but also causes the content of the lubricant oil dissolved in the refrigerant to increase, resulting in the decrease of the cooling capacity of the air conditioning system.

Disclosure of Invention

The utility model aims at providing a low oil mass rotary compressor to the problem that prior art exists.

In order to achieve the above object, the utility model adopts the following technical scheme:

a low-oil-quantity rotary compressor comprises a shell, a motor and a compression device, wherein the motor and the compression device are both positioned in the shell; a crankshaft is connected between the compression device and the motor; the compression device comprises an air cylinder and a piston arranged in the air cylinder, wherein a sliding sheet groove is formed in the inner side wall of the air cylinder, a sliding sheet is arranged in the sliding sheet groove, one end, extending out of the sliding sheet groove, of the sliding sheet abuts against the outer peripheral wall of the piston, a bearing for rotatably supporting the crankshaft is arranged at the upper end of the air cylinder, an oil hole is formed in the peripheral wall of the crankshaft, a spiral oil groove and an annular groove corresponding to the oil hole are formed in the inner side wall of the bearing, and an oil discharge hole is formed in the side wall of the bearing; the tail end of the spiral oil groove is communicated with the annular groove, and the oil discharge hole is communicated with the annular groove; the oil discharge hole is communicated with the sliding sheet groove through a guide pipe.

The utility model discloses can reduce the volume of adding oil, solve the lubrication problem of sliding vane groove department. The lubricating oil liquid level in the shell does not need to exceed the height of the sliding sheet, and the sliding sheet can be lubricated. When the rotary compressor is normally operated, the crankshaft is rotated at a high speed, and the lubricating oil is raised to the ring groove portion of the bearing by centrifugal force. Because the oil discharge hole is communicated with the annular groove, lubricating oil can be discharged into the oil cover through the oil discharge hole, and then the lubricating oil flows to the sliding sheet groove through the guide pipe, so that the oil level of the lubricating oil can be fully lubricated under the condition that the oil level is lower than the height of the sliding sheet groove, and the heat dissipation and the abrasion reduction at the sliding sheet are facilitated.

The utility model discloses can also improve the compressor oil extraction. In the prior art, lubricating oil is directly discharged to the inside of the rotary compressor through an oil hole and just on a gas discharge passage of the rotary compressor. The high pressure refrigerant discharged from the compressor pump body dissolves a portion of the lubricating oil. These high pressure cold air carries the lubricant out of the rotary compressor interior, resulting in a reduced amount of oil and increased friction losses within the rotary compressor. And the oil mass increases in the air conditioning pipeline, and lubricating oil adheres to condenser, evaporimeter and pipeline inner wall, also can reduce air conditioning system's refrigeration effect. The utility model discloses utilize the honeycomb duct will the bent axle is followed exhaust oil drainage arrives in the oilhole sliding vane groove department has both avoided lubricating oil to occupy the exhaust passage of compressor like this, has also improved the oil extraction effect of compressor.

Furthermore, the bearing upper end is equipped with the oil cover that has sealing function, the oil drain hole is located in the oil cover. The oil cover can prevent the lubricating oil from leaking.

Furthermore, an upper flange is arranged at the upper end of the cylinder, and the bearing is located in the middle of the upper flange. The upper flange mainly plays a supporting role.

Furthermore, the oil shield is opposite to the connecting end of the guide pipe and the position of the oil discharge hole, so that the guide pipe can guide lubricating oil conveniently.

Furthermore, one end of the flow guide pipe is communicated with the oil discharge hole; the other end of the flow guide pipe sequentially penetrates through the side wall of the oil shield and the side wall of the cylinder and is communicated with the slide sheet groove.

Furthermore, a guide pipe seat capable of guiding the pipe body of the guide pipe is arranged at the upper end of the upper flange. The guide pipe seat can guide and fix the pipe body of the guide pipe, so that the rotary compressor can effectively prevent the guide pipe from shaking in disorder due to vibration of the machine body during working.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model can reduce the oil filling amount in the rotary compressor and solve the lubrication problem at the slide groove; (II) the utility model discloses can also avoid lubricating oil to occupy the exhaust passage's of compressor problem, improve the compressor oil extraction.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

FIG. 2 is a schematic view of the structure at the position A of the present invention;

FIG. 3 is a schematic view of the upper flange structure of the present invention;

in the figure: 1. a housing; 2. a motor; 3. a crankshaft; 4. a cylinder; 5. an upper flange; 6. a bearing; 7. an oil cover; 8. a flow guide pipe; 9. an oil hole; 10. a helical oil groove; 11. a ring groove; 12. lightening holes; 13. and positioning the connecting hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, the present embodiment provides a low oil mass rotary compressor, which includes a housing 1, a motor 2 and a compression device, wherein the motor 2 and the compression device are both located in the housing 1. The motor 2 is located above the compression device, and the electronics include a stator and a rotor. A crankshaft 3 is connected between the compression device and the motor 2; compression device includes cylinder 4, sets up piston in the

cylinder

4, 4 inside walls of cylinder are equipped with the gleitbretter groove, the gleitbretter inslot is equipped with the gleitbretter, the gleitbretter stretches out the one end in gleitbretter groove is supported and is pressed the piston periphery wall, the gleitbretter other end pass through the gleitbretter spring with the connection of gleitbretter inslot inside wall. A compression chamber is formed between the inner side wall of the cylinder 4 and the outer side wall of the piston. The slide plate divides the compression cavity into a suction cavity and an exhaust cavity. The sliding sheet spring can enable the sliding sheet to be abutted against the rolling piston. The above is prior art. The connection and position relation of the cylinder 4, the sliding sheet, the spring and the piston are all the prior art means. If it is still questionable, reference is made to figure 2 of a rotary compressor of patent application No. 201510008216.7.

The cylinder 4 upper end is equipped with right bent axle 3 carries out the bearing 6 that the gyration was supported, 3 perisporium of bent axle are equipped with

oilhole

9, 6 inside walls of bearing be equipped with spiral oil groove 10 and annular 11 that oilhole 9 corresponds, just 6 lateral walls of bearing are equipped with the oil drain hole. The spiral oil groove 10 is in a screw thread shape. The tail end of the spiral oil groove 10 is communicated with the annular groove 11, and the oil discharge hole is communicated with the annular groove 11. The oil discharge hole is communicated with the sliding sheet groove through a guide pipe 8.

The lubricating oil pumped out from the bottom of the pump body is used for lubricating a friction pair in the pump body, and the redundant lubricating oil reaches the annular groove 11 through the oil hole 9 and is discharged through the oil discharge hole. The lubricating oil used for lubrication inside the pump body reaches the ring groove 11 through the spiral oil groove and is then discharged through the oil discharge hole. The oil discharge hole is communicated with the guide pipe 8, so that the lubricating oil discharged from the oil discharge hole flows into the sliding sheet groove through the guide pipe 8 to lubricate the sliding sheet groove.

The utility model discloses can reduce the volume of adding oil, solve the lubrication problem of sliding vane groove department. The lubricating oil level in the shell 1 does not need to exceed the height of the sliding sheet, and the sliding sheet can be lubricated. When the rotary compressor is normally operated, the crankshaft 3 is rotated at a high speed, and the lubricating oil is raised to the ring groove 11 of the bearing 6 by centrifugal force. Because the oil drain hole is communicated with the annular groove 11, lubricating oil can be discharged through the oil drain hole, and then the lubricating oil passes through the guide pipe 8 to the sliding sheet groove, so that the oil level of the lubricating oil can be fully lubricated under the condition that the oil level is lower than the height of the sliding sheet groove, and the heat dissipation and the abrasion reduction at the sliding sheet position are facilitated.

The utility model discloses can also improve the compressor oil extraction. In the prior art, the lubricating oil is directly discharged to the inside of the rotary compressor through the oil hole 9, and is just on the exhaust passage of the rotary compressor. The high pressure refrigerant discharged from the compressor pump body dissolves a portion of the lubricating oil. These high pressure cold air carries the lubricant out of the rotary compressor interior, resulting in a reduced amount of oil and increased friction losses within the rotary compressor. And the oil mass increases in the air conditioning pipeline, and lubricating oil adheres to condenser, evaporimeter and pipeline inner wall, also can reduce air conditioning system's refrigeration effect. The utility model discloses utilize honeycomb duct 8 will bent axle 3 is followed exhaust oil drainage arrives in the oilhole 9 slider groove department has both avoided lubricating oil to occupy the exhaust passage of compressor like this, has also improved the oil extraction effect of compressor.

Further, an oil cover 7 with a sealing function is arranged at the upper end of the bearing 6, and the oil discharge hole is located in the oil cover 7. The oil cover 7 can prevent the lubricating oil from leaking out.

Further, an upper flange 5 is arranged at the upper end of the cylinder 4, and the bearing 6 is located in the middle of the upper flange 5. The upper flange 5 mainly serves as a support. Preferably, the upper flange 5 is provided at an upper end thereof with a guide pipe holder capable of guiding the guide pipe 8. The pipe seat can guide and fix the pipe body of the flow guide pipe 8, and the pipe seat can guide and fix the pipe body of the flow guide pipe 8, so that the rotary compressor can effectively prevent the occurrence of the phenomenon that the flow guide pipe 8 is shaken in disorder due to the vibration of the machine body during working. The upper flange 5 is also provided with lightening holes 12 for lightening and positioning connecting holes 13 for positioning connection.

Furthermore, the oil cover 7 is opposite to the connecting end of the guide pipe 8 and the position of the oil discharge hole, so that the guide pipe 8 can guide lubricating oil.

Furthermore, one end of the draft tube 8 is communicated with the oil discharge hole; the other end of the draft tube 8 sequentially penetrates through the side wall of the oil shield 7 and the side wall of the cylinder 4 and is communicated with the slide sheet groove.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low-oil-quantity rotary compressor comprises a shell, a motor and a compression device, wherein the motor and the compression device are both positioned in the shell; a crankshaft is connected between the compression device and the motor; the compression device comprises an air cylinder and a piston arranged in the air cylinder, wherein a slide sheet groove is formed in the inner side wall of the air cylinder, and a slide sheet is arranged in the slide sheet groove; the tail end of the spiral oil groove is communicated with the annular groove, and the oil discharge hole is communicated with the annular groove; the oil discharge hole is communicated with the sliding sheet groove through a guide pipe.

2. The low-oil-amount rotary compressor according to claim 1, wherein the bearing upper end is provided with an oil cover having a sealing function, and the oil discharge hole is located in the oil cover.

3. The low-oil-amount rotary compressor according to claim 1, wherein an upper flange is provided at an upper end of the cylinder, and the bearing is located at a middle portion of the upper flange.

4. The low-oil-amount rotary compressor of claim 2, wherein the oil cover is positioned opposite to the connection end of the flow guide pipe and the oil discharge hole.

5. The low-oil-amount rotary compressor of claim 2, wherein one end of the flow guide pipe is communicated with the oil discharge hole; the other end of the flow guide pipe sequentially penetrates through the side wall of the oil shield and the side wall of the cylinder and is communicated with the slide sheet groove.

6. The low-oil-amount rotary compressor according to claim 3, wherein a guide pipe holder capable of guiding the pipe body of the flow guide pipe is provided at an upper end of the upper flange.