CN112922836A

CN112922836A - Gas compressor

Info

Publication number: CN112922836A
Application number: CN202110356606.9A
Authority: CN
Inventors: 汪平和
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-06-08

Abstract

The invention discloses a gas compressor, which relates to the technical field of compressors and comprises a front end cover and a cylinder which are hermetically connected, wherein a matched rotor and a plurality of sliding blocks are eccentrically arranged in the cylinder, the rotor and the sliding blocks divide the cylinder into an air inlet cavity and a compression cavity, and the compression cavity is divided into a sliding groove compression cavity and an eccentric compression cavity. The chute compression cavity and the eccentric compression cavity are two compression cavities which are not communicated in a sealing way, and compressed gas with different pressures is compressed in the chute compression cavity and the eccentric compression cavity. The compressed gas discharged from the gas outlet of the chute cavity is compressed gas in the chute compression cavity, the compressed gas discharged from the gas outlet of the eccentric cavity is compressed gas in the eccentric compression cavity, and the compressed gas pressure in the chute compression cavity and the compressed gas pressure in the eccentric compression cavity are different, so that the whole gas compressor can realize the output of the compressed gas with different pressures without adding extra accessories, and the gas compression ratio is not single and is relatively suitable for a wider range.

Description

Gas compressor

Technical Field

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

Background

The compressor is applied to industries such as wind braking, pneumatic tools, surveying, experiments and the like, and has a wide range. Therefore, there are various types of gas compressors, including piston reciprocating positive displacement compressors, screw rotary positive displacement compressors, vane positive displacement compressors, etc., and among them, the vane positive displacement compressors are widely used because of their simple structure, easy manufacture, and convenient operation and maintenance.

The sliding vane compressor consists of cylinder, rotor and sliding vane, the rotor is eccentrically arranged in the cylinder, the rotor has several longitudinal grooves, and the sliding vane capable of sliding freely along radial direction is mounted in the grooves. Because the rotor is eccentrically arranged in the cylinder, a crescent space is formed between the inner wall of the cylinder and the outer surface of the rotor, when the rotor rotates, the sliding sheet is thrown out from the groove under the action of centrifugal force, the end part of the sliding sheet is tightly attached to the inner circle wall surface of the cylinder, and the crescent space is divided into a plurality of fan-shaped small chambers by the sliding sheet, which are called as element volumes. And within one rotation of the rotor, the volume of each element is gradually increased from the minimum value to the maximum value, the gas is sucked, and then gradually decreased from the maximum value to the minimum value, and the sucked gas is compressed. With the continuous rotation of the rotor, the cell volume changes cyclically following the above-mentioned law.

The gas compressed by the traditional sliding vane compressor is only positioned in the element volume, and the gas outlet is communicated with the element volume with the minimum value to output the compressed gas. Each type of sliding vane compressor correspondingly outputs gas with one pressure, the gas compression ratio is single, and the application range is narrow.

Disclosure of Invention

The invention aims to: in view of the above problems, the present invention provides a gas compressor capable of outputting gases of different pressures and having a relatively wide application range.

The technical scheme adopted by the invention is as follows:

a gas compressor comprises a front end cover and a cylinder which are connected in a sealing way, wherein a matched rotor and a plurality of sliding blocks are eccentrically arranged in the cylinder, the rotor and the sliding blocks divide the cylinder into an air inlet cavity and a compression cavity, the compression cavity is divided into a chute compression cavity defined by the rotor and the sliding blocks and an eccentric compression cavity defined by the cylinder, the rotor and the sliding blocks respectively, the chute compression cavity and the eccentric compression cavity are relatively sealed and not communicated, and compressed gases with different pressures are compressed in the chute compression cavity and the eccentric compression cavity; the front end cover is provided with a chute cavity exhaust port communicated with the chute compression cavity and an eccentric cavity exhaust port communicated with the eccentric compression cavity.

Preferably, the air inlet cavity is divided into a chute air inlet cavity enclosed by the rotor and the sliding block and an eccentric air inlet cavity except the chute air inlet cavity, and the chute air inlet cavity and the eccentric air inlet cavity are relatively sealed and not communicated; the end cover is also provided with a chute cavity air inlet communicated with all chute air inlet cavities, and the side wall of the cylinder is provided with a main air inlet communicated with the eccentric air inlet cavity.

Preferably, a gas compressor further comprises a rear end cover hermetically connected with the cylinder.

Preferably, the middle part of the cylinder is provided with a centrifugal hole, the rotor is positioned in the centrifugal hole, and the air inlet cavity and the compression cavity occupy the whole centrifugal hole.

Preferably, the center of the rotor is provided with a shaft hole, and a plurality of sliding grooves which are adaptive to the shapes and the number of the sliding blocks are radially arranged.

Preferably, the opposite surfaces of the sliding block, which are opposite to the front end cover and the rear end cover, are provided with first sealing lubrication grooves; one end of the sliding block close to the cylinder is an arc surface adaptive to the inner wall of the centrifugal hole of the cylinder.

Preferably, the front side and the back side of the rotor are both provided with second sealed lubricating grooves along the radial direction, and the front end cover and the rear end cover are respectively provided with annular third sealed lubricating grooves along the circumferential direction.

Preferably, solid lubrication is adopted among the front end cover, the rear end cover and the rotor and among the sliding block and the rotor.

Preferably, the front end cover is provided with a front axle connecting hole, the rear end cover is provided with a rear axle connecting hole, the front axle connecting hole and the rear axle connecting hole are coaxial and concentric with the axle hole, and the front axle connecting hole, the rear axle connecting hole and the axle hole penetrate through the same rotating shaft.

Preferably, the cooling fins are arranged on the outer wall of the cylinder along the circumferential direction.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the chute compression cavity and the eccentric compression cavity are two compression cavities which are not communicated in a sealing way, and compressed gas with different pressures is compressed inside the chute compression cavity and is realized by matching between the rotor and the sliding block, and the compressed gas in the eccentric compression cavity is realized by matching between the rotor and the sliding block and the cylinder. The compressed gas discharged from the gas outlet of the chute cavity is compressed gas in the chute compression cavity, the compressed gas discharged from the gas outlet of the eccentric cavity is compressed gas in the eccentric compression cavity, and the compressed gas pressure in the chute compression cavity and the compressed gas pressure in the eccentric compression cavity are different, so that the whole gas compressor can realize the output of the compressed gas with different pressures without adding extra accessories, and the gas compression ratio is not single and is relatively suitable for a wider range.

Drawings

Fig. 1 is a schematic view of a gas compressor.

Fig. 2 is a schematic view of another angle structure of fig. 1.

Fig. 3 is a longitudinal sectional view of the cylinder, rotor, and slider combination.

FIG. 4 is a graph of FIG. 3 with the addition of a gas schematic, wherein a greater cross-sectional line density indicates a greater gas pressure.

Fig. 5 is a front view of the front end cap.

Fig. 6 is a rear view of the front end cap.

Fig. 7 is a schematic structural view of the cylinder.

Fig. 8 is a front view of the rotor.

Fig. 9 is a schematic structural view of a slider.

Fig. 10 is a rear view of the rear end cap.

FIG. 11 is a front view of the rear end cap.

The labels in the figure are: the lubricating device comprises a front end cover-1, a chute cavity exhaust port-11, an eccentric cavity exhaust port-12, a chute cavity air inlet-13, a front shaft connecting hole-14, an air cylinder-2, a chute compression cavity-21, an eccentric compression cavity-22, a chute air inlet cavity-23, an eccentric air inlet cavity-24, a main air inlet-25, a radiating fin-26, a centrifugal hole-27, a rotor-3, a shaft hole-31, a chute-32, a second sealing lubricating groove-33, a sliding block-4, a first sealing lubricating groove-41, a rear end cover-5, a rear shaft connecting hole-51, a rotating shaft 6, a threaded hole-71 and a third sealing lubricating groove-72.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 6, a gas compressor includes a front end cover 1 and a cylinder 2, which are hermetically connected, the front end cover 1 is located on the front side of the cylinder 2, the edges of the front end cover 1 and the cylinder 2 are both provided with coaxial and concentric threaded holes 71, and the front end cover 1 and the cylinder 2 are hermetically connected in a manner of being matched with the threaded holes 71 through bolts. The rotor 3 and the 6-10 sliding blocks 4 which are matched are eccentrically arranged in the cylinder 2, the rotor 3 rotates clockwise and axially, centrifugal force is generated to throw the sliding blocks 4 to be tightly attached to the inner wall of the cylinder 2, the rotor 3 and the sliding blocks 4 divide the cylinder 2 into an air inlet cavity and a compression cavity which are equal in area, the compression cavity is divided into a sliding groove compression cavity 21 which is respectively enclosed by the rotor 3 and a half of the sliding blocks 4 and has different pressures and an eccentric compression cavity 22 which is respectively enclosed by the cylinder 2, the rotor 3 and the different sliding blocks 4, the pressure of gas compressed by the sliding groove compression cavity 21 and the eccentric compression cavity 22 in the clockwise direction is increasingly large, the sliding groove compression cavity 21 and the eccentric compression cavity 22 are relatively sealed and not communicated, and compressed gas in the sliding groove compression cavity 21 and the; the front end cover 1 is provided with a chute cavity exhaust port 11 communicated with the chute compression cavity 21 and an eccentric cavity exhaust port 12 communicated with the eccentric compression cavity 22, the chute cavity exhaust port 11 exhausts compressed gas in the chute compression cavity 21, and the eccentric cavity exhaust port 12 exhausts gas in the eccentric compression cavity 22.

The compressed gas pressure in the chute compression chamber 21 and the eccentric compression chamber 22, which are located in the same radial direction of the rotor 3, are the same. In a preferred embodiment, the chute chamber exhaust port 11 and the eccentric chamber exhaust port 12 are communicated with the chute compression chamber 21 and the eccentric compression chamber 22 in the same radial direction to exhaust compressed gas with the same pressure, and at the moment, the two exhaust ports simultaneously exhaust gas, so that the exhaust volume is increased, and the mechanical efficiency of the gas compressor is improved. In another preferred embodiment, the chute cavity exhaust port 11 and the eccentric cavity exhaust port 12 are communicated with the chute compression cavity 21 and the eccentric compression cavity 22 in different radial directions to discharge compressed gas with different pressures, so that a gas compressor is realized to discharge two kinds of gas with different pressures, the compression ratio is different, and the application range is wide.

In addition, the pressure of the compressed gas in different chute compression cavities 21 is also different, and the chute compression cavities 21 which are correspondingly required to be compressed can be selectively communicated with the chute cavity exhaust port 11 according to different compression pressure requirements. Similarly, the pressure of the compressed gas in different eccentric compression cavities 22 is different, and the eccentric compression cavities 22 of the corresponding compressed gas can be selectively communicated with the eccentric cavity exhaust ports 12 according to different compression pressure requirements.

In another preferred embodiment, a plurality of front end covers 1 are provided, and different combinations of the positions of the chute cavity exhaust port 11 and the eccentric cavity exhaust port 12 formed in each different front end cover 1 are different, and different front end covers 1 are installed in a matching manner according to different compression pressure requirements.

Referring to fig. 1 to 6, further, the air inlet cavity is further divided into a chute air inlet cavity 23 surrounded by the rotor 3 and the other half of the slide block 4, and an eccentric air inlet cavity 24 except the chute air inlet cavity 23, the chute air inlet cavity 23 and the eccentric air inlet cavity 24 are relatively sealed and not communicated, and air inlets of the chute air inlet cavity and the eccentric air inlet cavity are not interfered with each other; still set up the spout chamber air inlet 13 that communicates all spout air inlet chamber 23 on the end cover for admit air in the chamber 23 to the spout, and then make slider 4 and rotor 3 cooperation compressed gas, produce the compressed gas in the spout compression chamber 21, the main air inlet 25 of intercommunication eccentric air inlet chamber 24 is seted up to the 2 lateral walls of cylinder, be used for admitting air in the chamber 24 to eccentric air inlet, and then make slider 4, rotor 3 and the 2 cooperation compressed gas of cylinder, produce the compressed gas in the eccentric compression chamber 22.

Referring to fig. 1 to 4, further, in the rotation process of the rotor 3, the compressed gas in the chute compression cavity 21 generates a thrust on the slider 4, the compressed gas in the eccentric compression cavity 22 also generates a thrust on the slider 4, the compressed gas in the chute compression cavity 21 and the eccentric compression cavity 22 in the same radial direction have the same pressure, the thrust generated on the slider 4 in the radial direction is also the same, the two thrusts are reversely offset, and the slider 4 is only subjected to a centrifugal force caused by the rotation of the rotor 3, so that the incomplete centrifugal movement of the slider 4 is prevented, and the strength of the compressed gas is not affected.

Referring to fig. 1, 2, 10, and 11, further, the gas compressor further includes a rear end cover 5 hermetically connected to the cylinder 2, the rear end cover 5 is located on the back surface of the cylinder 2, a threaded hole 71 adapted to a threaded hole 71 of the cylinder 2 is also formed in an edge of the rear end cover 5, and the two are also hermetically connected by a bolt and the threaded hole 71 in a matching manner. The front end cover 1, the cylinder 2 and the rear end cover 5 are sequentially connected, and the detachable connection mode is convenient to detach, overhaul and replace.

Referring to fig. 1 to 4 and 7, further, a centrifugal hole 27 is formed in the middle of the cylinder 2, the rotor 3 is located in the centrifugal hole 27, the aperture of the centrifugal hole 27 is larger than the diameter of the rotor 3, the center of the rotor 3 is located below the center of the centrifugal hole 27, and the air inlet cavity and the compression cavity occupy the whole centrifugal hole 27.

Referring to fig. 1 to 3 and 8, further, a shaft hole 31 is formed in the center of the rotor 3, 6 to 10 sliding grooves 32 adapted to the shape and number of the sliding blocks 4 are radially formed in the center, and one sliding block 4 is disposed in each sliding groove 32. The front and back sides of the rotor 3 are identical.

Referring to fig. 9, further, opposite surfaces of the slider 4 facing the front end cover 1 and the rear end cover 5 are provided with first sealing lubrication grooves 41 for containing a lubricant, reducing friction between the slider and the front end cover 1 and between the slider and the rear end cover 5, and increasing air tightness. The length of the slide block 4 is greater than the maximum distance between the rotor 3 and the cylinder 2; one end of the sliding block 4 close to the cylinder 2 is an arc surface which is matched with the inner wall of a centrifugal hole 27 of the cylinder 2, so that the air tightness between the eccentric compression cavities 22 is improved.

Referring to fig. 8 to 11, further, the front and back surfaces of the rotor 3 are radially provided with second sealed lubrication grooves 33 for containing lubricants, and the front end cover 1 and the back end cover 5 are circumferentially provided with annular third sealed lubrication grooves 72 for containing lubricants, so as to reduce friction between the rotor 3 and the front end cover 1 and the back end cover 5, increase air tightness, and ensure a compression ratio.

Referring to fig. 5, 6, 8 to 11, further, solid lubrication is performed between the front end cover 1, the rear end cover 5 and the rotor 3 and between the slider 4 and the rotor 3, and the lubricants contained in the first sealing lubrication groove 41, the second sealing lubrication groove 33, and the third sealing lubrication groove 72 are all solid, so that liquid lubrication is replaced by liquid lubrication, the liquid lubricant is prevented from being mixed with gas, and an oil-gas separation device matched with the liquid lubricant is not required.

Referring to fig. 1, fig. 2, fig. 5, fig. 6, fig. 8, fig. 10, and fig. 11, further, a front shaft connecting hole 14 is formed in the front end cover 1, a rear shaft connecting hole 51 is formed in the rear end cover 5, the front shaft connecting hole 14 and the rear shaft connecting hole 31 are coaxial and concentric with the shaft hole 31, the same rotating shaft 6 penetrates through the three, the rotating shaft 6 is connected with a motor, and the motor is started to drive the rotor 3 to rotate.

Referring to fig. 1 to 3 and 7, further, fins 26 are arranged on the outer wall of the cylinder 2 along the circumferential direction, and heat generated in the cylinder 2 is dissipated from the fins 26.

The working principle is as follows: the motor drives the rotating shaft 6 to rotate, and drives the rotor 3 to rotate clockwise in the centrifugal hole 27 of the cylinder 2; the rotor 3 rotates to generate centrifugal force, and the slide block 4 is driven to continuously press and attach to the inner wall of the cylinder 2 along the radial direction in the chute 32 of the rotor 3 to form a plurality of eccentric air inlet cavities 24 and eccentric compression cavities 22 with different volumes.

Rotor 3 rotates 0 ° -180 °: the slide 4 moves in the slide groove 32 of the rotor 3 in a direction to approach the inner wall of the cylinder 2 in the radial direction. The volume in the eccentric air inlet cavity 24 is gradually increased from small to large, and air is sucked from the main air inlet 25; the chute inlet chamber 23 is gradually increased in volume from small to large and sucks air from the chute chamber inlet 13.

Rotor 3 rotates to 180 °: the eccentric distance value is maximum; the slide block 4 which is farthest away from the rotor 3 and the slide block 4 in the adjacent air inlet cavity form the maximum volume of the eccentric air inlet cavity 24; the slide block 4 farthest from the rotor 3 and the chute 32 of the corresponding rotor 3 form the largest volume of the chute inlet chamber 23;

rotor 3 rotates 180 ° -360 °: the slide 4 moves radially away from the inner wall of the cylinder 2 in the slide groove 32 of the rotor 3. The volume in the eccentric compression chamber 22 is gradually reduced from large to small, and the gas starts to be compressed and discharged from the eccentric chamber exhaust port 12. The capacity of the chute compression chamber 21 gradually decreases from large to small, and the gas starts to be compressed and discharged from the chute chamber exhaust port 11.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to aid in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A gas compressor comprises a front end cover and a cylinder which are connected in a sealing way, wherein a rotor and a plurality of sliding blocks which are matched with each other are eccentrically arranged in the cylinder, and the rotor and the sliding blocks divide the cylinder into an air inlet cavity and a compression cavity; the front end cover is provided with a chute cavity exhaust port communicated with the chute compression cavity and an eccentric cavity exhaust port communicated with the eccentric compression cavity.

2. The gas compressor as claimed in claim 1, wherein the air inlet chamber is further divided into a chute air inlet chamber surrounded by the rotor and the slider, and an eccentric air inlet chamber except the chute air inlet chamber, and the chute air inlet chamber is sealed and not communicated with the eccentric air inlet chamber; the end cover is also provided with a chute cavity air inlet communicated with the chute air inlet cavity, and the side wall of the cylinder is provided with a main air inlet communicated with the eccentric air inlet cavity.

3. A gas compressor according to claim 2 further comprising a rear end cap sealingly connected to the cylinder.

4. The gas compressor as claimed in claim 1, wherein the cylinder has a centrifugal hole formed in a middle portion thereof, the rotor is located in the centrifugal hole, and the intake chamber and the compression chamber occupy the entire centrifugal hole.

5. The gas compressor as claimed in claim 4, wherein the rotor has a shaft hole formed at a center thereof and a plurality of sliding grooves radially formed therein in a shape and number adapted to the sliding blocks.

6. The gas compressor as claimed in claim 5, wherein the slider has first seal lubrication grooves formed on opposite sides thereof facing the front and rear end covers; one end of the sliding block close to the cylinder is an arc surface adaptive to the inner wall of the centrifugal hole of the cylinder.

7. The gas compressor as claimed in claim 3, wherein the front and back faces of the rotor are radially provided with second sealing and lubricating grooves, and the front and rear covers are circumferentially provided with annular third sealing and lubricating grooves, respectively.

8. A gas compressor as claimed in claim 2 wherein the front and rear end covers and the rotor and the slide and the rotor are solid lubricated.

9. The gas compressor as claimed in claim 3, wherein the front cover has a front axle hole, the rear cover has a rear axle hole, and the front axle hole and the rear axle hole are coaxial and concentric with the axle hole, and the front axle hole and the rear axle hole are provided with the same axle.

10. A gas compressor according to any one of claims 1 to 9, wherein the outer wall of the cylinder is circumferentially provided with fins.