CN111102162A

CN111102162A - Refrigeration compressor

Info

Publication number: CN111102162A
Application number: CN201911317149.1A
Authority: CN
Inventors: 王富金
Original assignee: Fuzhou Jinzhengjie Refrigeration Equipment Co Ltd
Current assignee: Fuzhou Jinzhengjie Refrigeration Equipment Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-05-05
Anticipated expiration: 2039-12-19
Also published as: CN111102162B

Abstract

The invention discloses a refrigeration compressor, and relates to the technical field of refrigeration. Including the compression case and the compression cylinder that communicate each other, the oil storage bin has been seted up to the inside of piston, lubricated chamber has been seted up to the both sides of piston, oil storage bin and lubricated chamber intercommunication, the upper portion in oil storage bin is linked together through the oil circuit with the oil inlet on the driven shaft, the spout has been seted up to the bottom surface of piston, sliding connection has the slider in the spout, the slider is connected with the sprue that is located the oil storage bin, the sprue upwards can plug up the oil circuit, can plug up the spout downwards. The piston rod and the piston are positioned in the compression cylinder, a partition plate is arranged below the piston in the compression cylinder, a refrigerant inlet and a refrigerant outlet are formed in the bottom of the piston cylinder, an air inlet hole and an air outlet hole are formed in the partition plate, a movable plate is arranged on the air inlet hole, one end of the movable plate is fixed on the partition plate, and the other end of the movable plate is movably connected with a fixed block fixed on the partition plate through a spring.

Description

Refrigeration compressor

Technical Field

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

Background

The piston compressor is a compressor which can make gas be pressurized and transferred by means of reciprocating motion of piston, belonging to volume type compressor, also called reciprocating piston compressor or reciprocating compressor, mainly consisting of working cavity, driving component, machine body and auxiliary component, the working cavity can be directly used for compressing gas, and is formed from cylinder, cylinder sleeve, gas valve, filler, piston and piston rod.

Some small-size piston refrigeration compressors among the prior art, the friction between piston and the piston cylinder is great, has reduced the life of piston, and long-time the use can make the piston cylinder take place slight deformation, also has certain influence to the leakproofness of piston cylinder. Chinese patent document CN 207974942U discloses a compressor piston, which has an oil cavity in the piston body, and an oil pressing plate movably disposed in the oil cavity, wherein the oil pressing plate moves along with the movement of the piston body, thereby achieving oil collection and oil discharge, further lubricating the surface of the piston body, reducing the friction force between the piston and the piston cylinder, and prolonging the service life of the device. But the compressor is a sealed box, sets up the oil inlet on the piston and causes when lubricating oil adds troublesome, and the piston motion is a more violent circulating reciprocating motion moreover, and lubricating oil in the annular groove easily overflows, causes the waste, and lubricating oil flow in the piston intracavity can have negative effects to refrigeration effect moreover.

Disclosure of Invention

The invention aims to provide a refrigeration compressor, which reduces the friction force between a piston and a piston cylinder and is convenient for adding lubricating oil.

In order to solve the technical problems, the invention provides the following technical scheme:

a refrigeration compressor comprises a compression box and a compression cylinder which are communicated with each other, two bearings are fixed on two opposite side walls of the compression box, driven shafts and power shafts are fixedly connected to inner rings of the bearings respectively, one end, penetrating through the compression box, of each power shaft is connected with the output end of a servo motor, the opposite ends of the driven shafts and the power shafts are connected with crank arms, middle shafts are fixedly connected with the two crank arms, the middle shafts are movably connected with piston rods, and pistons are connected to the bottoms of the piston rods.

The oil storage bin is arranged inside the piston, the lubricating cavities are arranged on two sides of the piston, the oil storage bin is communicated with the lubricating cavities, the upper portion of the oil storage bin is communicated with an oil inlet in the driven shaft through an oil way, the bottom surface of the piston is provided with a sliding groove, a sliding block is connected in the sliding groove, the sliding block is connected with a blocking block located in the oil storage bin, the oil way can be blocked by the blocking block upwards, and the sliding groove can be blocked by the blocking block downwards.

The piston rod and the piston are positioned in the compression cylinder, a partition plate is arranged below the piston in the compression cylinder, a refrigerant inlet and a refrigerant outlet are formed in the bottom of the piston cylinder, an air inlet hole and an air outlet hole are formed in the partition plate, a movable plate is arranged on the air inlet hole, one end of the movable plate is fixed on the partition plate, and the other end of the movable plate is movably connected with a fixed block fixed on the partition plate through a spring.

The lubricating cavity is arranged to lubricate the surface of the piston, so that the friction force between the piston and the compression cylinder is reduced, and the service life of the equipment is prolonged.

The bottom surface of the piston is provided with a sliding groove, the inside of the sliding groove is connected with a sliding block in a sliding mode, and the sliding block is connected with a plug inside the oil storage bin. The sliding chute and the sliding block are arranged, so that the sliding block is driven to do reciprocating motion by utilizing the pressure intensity change generated by the motion of the piston, and the lubricating oil in the oil storage bin flows to the lubricating cavity to achieve the lubricating effect. The plug can prevent the piston from overflowing during movement and flowing into the compression cylinder to influence the refrigeration effect.

Furthermore, the lower part of the right side of the compression box is fixedly communicated with a refrigerant inlet, an air inlet hole is formed in the inner bottom wall of the compression box, and a fixing block is fixedly connected to the left side of the air inlet hole.

The arrangement of the air inlet hole can realize that the refrigerant flowing from the refrigerant inlet flows into the compression cylinder. The upper surface fixedly connected with spring of fixed block, the one end fixedly connected with movable plate that the fixed block was kept away from to the spring, the one end that the spring was kept away from to the movable plate is fixed articulated with the compression box. The spring and the movable plate can close the air inlet hole when in compression, so that compressed refrigerant is prevented from flowing back into the refrigerant inlet.

Compared with the prior art, the piston of the refrigeration compressor has the following beneficial effects:

the oil storage bin is arranged, so that the friction force between the piston and the compression box can be reduced, the service life of the equipment is prolonged, and the failure rate of the equipment is reduced. The pressure generated by the movement of the piston can be utilized to drive the sliding block to do reciprocating motion by arranging the sliding chute and the sliding block, so that the lubricating oil in the oil storage bin flows into the lubricating cavity to achieve the lubricating effect, and meanwhile, the lubricating oil in the oil storage bin is prevented from flowing into the piston cavity to influence the refrigerating effect. The arrangement of the air inlet hole can enable the refrigerant flowing into the refrigerant inlet to flow into the compression box, and the arrangement of the spring and the movable plate can close the air inlet hole when the refrigerant is compressed, so that the compressed refrigerant is prevented from flowing back into the refrigerant inlet.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present invention;

FIG. 2 is a perspective view of the power system of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

in the figure: 1-compression box, 2-compression cylinder, 3-servo motor, 4-bearing, 5-power shaft, 6-crank arm, 7-middle shaft, 8-partition plate, 9-piston rod, 10-oil path, 11-oil inlet, 12-refrigerant inlet, 13-refrigerant outlet, 14-piston, 15-slide block, 16-air outlet, 17-lubrication cavity, 18-sliding groove, 19-moving plate, 20-spring, 21-fixed block, 22-air inlet, 23-block, 24-oil storage bin, 25-driven shaft and 26-fixed plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a refrigeration compressor piston, including compression case 1, the right side fixedly connected with fixed plate 26 of compression case 1, the last fixed surface of fixed plate 26 is connected with servo motor 3, servo motor 3's output fixedly connected with power shaft 5, the fixed inlaying of lateral wall of compression case 1 has two symmetrical bearings 4, bearing 4's inner circle is fixedly connected with driven shaft 25 and power shaft 5 respectively, the equal fixedly connected with crank arm 6 of one end that driven shaft 25 and power shaft 5 are close to each other, the one end fixedly connected with axis 7 that two crank arm 6 are close to each other, axis 7's surface swing joint has piston rod 9, oil circuit 10 has been seted up to piston rod 9's inside, the lower extreme fixedly connected with piston 14 of piston rod 9. The bottom surface of the piston 14 is provided with a sliding chute 18, the inside of the sliding chute 18 is connected with a sliding block 15 in a sliding manner, and the upper part of the sliding block 15 extends to an internal connecting plug 23 of an oil storage bin 24. The sliding chute 18 and the sliding block 15 are arranged to drive the sliding block 15 to reciprocate by using the pressure generated by the movement of the piston 14, so that the lubricating oil in the oil storage bin 24 flows into the lubricating cavity 17 to achieve the lubricating effect.

An oil storage bin 24 is arranged inside the piston 14, lubricating cavities 17 are arranged on two sides of the piston 14, and the upper portion of the oil storage bin 24 is communicated with the oil way 10. Set up oil storage bin 24 and can avoid piston 14 to spill over when the motion, influence refrigeration effect in flowing into compression cylinder 2, set up lubricated chamber 17 and can lubricate piston 14 surface, reduced the frictional force of piston 14 and compression cylinder 2, the life of extension equipment, the left side fixedly connected with oil inlet 11 of driven shaft 25.

The lower part of the compression cylinder 2 is fixedly communicated with a refrigerant inlet 12, a partition plate 8 in the compression cylinder 2 is provided with an air inlet 22, the left side of the air inlet 22 is fixedly connected with a fixed block 21, and the air inlet 22 is arranged to enable the refrigerant flowing from the refrigerant inlet 12 to flow into the compression cylinder 2. The fixed block 21 is arranged to provide supporting force for the moving plate 19, the spring 20 is fixedly connected to the upper surface of the fixed block 21, the moving plate 19 is fixedly connected to one end, far away from the fixed block 21, of the spring 20, and one end, far away from the spring 20, of the moving plate 19 is fixedly hinged to the partition plate 8. The spring 20 and the movable plate 19 are arranged to close the air inlet hole 22 when being compressed, so that the compressed refrigerant is prevented from flowing back into the refrigerant inlet 12, the bottom surface of the compression cylinder 2 is fixedly communicated with the refrigerant outlet 13, and the left side of the partition plate 8 is provided with the air outlet hole 16. One end of the oil path 10, which is far away from the piston 14, is communicated with the oil inlet 11, a cover plate is slidably connected to the outer surface of the oil inlet 11, and the cover plate can be arranged to conveniently close the oil inlet 11 so as to prevent lubricating oil from flowing back when the equipment works, so that the lubricating effect of the equipment is reduced, and the waste caused by the flowing-out of the lubricating oil can be reduced.

The servo motor 3 is a known technology which is widely applied and used in daily life, and the servo motor 3 is a permanent magnet alternating current servo motor and has the advantages of light weight and small size.

When the piston type compression cylinder is used, firstly, the servo motor 3 is started, the servo motor 3 drives the power shaft 5 to rotate, the power shaft 5 drives the crank arm 6 to rotate, and the crank arm 6 drives the piston 14 to perform piston motion in the compression cylinder 2 through the middle shaft 7. While refrigerant enters the compression cylinder 2 from the refrigerant inlet 12. The moving plate 19 is closed by the compression of the piston 14, the compressed refrigerant flows out of the refrigerant outlet 13 to the condensation pipe, and meanwhile, in the compression process, the sliding block 15 moves upwards under the influence of the lower pressure to press the lubricating oil in the oil storage bin 24 to flow into the lubricating cavity 17, so that the lubricating effect is achieved. When the piston 14 moves upward, the moving plate 19 is opened by the elastic force of the spring 20, the refrigerant is continuously introduced into the refrigerant inlet 12, and the next compression cycle starts. When lubricating oil needs to be added into the oil storage bin 24, the cover plate is only required to be opened to add the lubricating oil into the oil inlet 11, the lubricating oil is not required to be added too much, and the cover plate is closed after the lubricating oil is added, so that the lubricating oil is prevented from flowing outwards to cause waste.

Claims

1. The refrigeration compressor is characterized by comprising a compression box (1) and a compression cylinder (2) which are communicated with each other, wherein two bearings (4) are fixed on two opposite side walls of the compression box (1), inner rings of the bearings (4) are respectively and fixedly connected with a driven shaft (25) and a power shaft (5), one end, penetrating through the compression box (1), of the power shaft (5) is connected with the output end of a servo motor, one ends, opposite to the driven shaft (25) and the power shaft (5), of the driven shaft (25) and the power shaft (5) are respectively connected with a crank arm (6), two crank arms (6) are fixedly connected with a middle shaft (7), the middle shaft (7) is movably connected with a piston rod (9), and the bottom of the piston rod (9);

an oil storage bin (24) is arranged in the piston (14), lubricating cavities (17) are arranged on two sides of the piston (14), the oil storage bin (24) is communicated with the lubricating cavities (17), the upper portion of the oil storage bin (24) is communicated with an oil inlet (11) in a driven shaft (25) through an oil way (10), a sliding groove (18) is arranged on the bottom surface of the piston (14), a sliding block (15) is connected in the sliding groove (18) in a sliding mode, the sliding block (15) is connected with a blocking block (23) located in the oil storage bin, the blocking block (23) can block the oil way (10) upwards, and the sliding groove (18) can be blocked downwards;

the piston rod (9) and the piston (14) are located in the compression cylinder (2), a partition plate (8) is further arranged below the piston (14) in the compression cylinder, a refrigerant inlet (12) and a refrigerant outlet (13) are formed in the bottom of the piston cylinder, an air inlet hole (22) and an air outlet hole (16) are formed in the partition plate (8), a moving plate (19) is arranged on the air inlet hole (22), one end of the moving plate (19) is fixed on the partition plate (8), and the other end of the moving plate (19) is movably connected with a fixed block (21) fixed on the partition plate through a spring (20).

2. A refrigeration compressor piston according to claim 1, wherein: the lower part of the right side of the compression cylinder (2) is provided with a refrigerant inlet (12), and the bottom wall of the compression cylinder (2) is provided with a refrigerant outlet (13).

3. A refrigeration compressor piston according to claim 4, wherein: the upper surface fixed connection of fixed block (21) has spring (20), the upper end of spring (20) is connected with movable plate (19), the other end and baffle (8) of movable plate (19) are articulated fixed.

4. A refrigeration compressor piston according to claim 1, wherein: the oil circuit (10) passes through the driven shaft, the crank arm, the middle shaft and the piston rod.

5. A refrigeration compressor piston according to claim 1, wherein: the outer surface of the oil inlet (11) is connected with a cover plate.