CN219754801U - Sliding vane type cylinder with long service life - Google Patents

Abstract

The utility model relates to the technical field of air compressors, in particular to a sliding vane type air cylinder with long service life, which comprises: the cylinder body is provided with a compression cavity, an air inlet and an air outlet, the air inlet and the air outlet are both communicated with the compression cavity, the eccentric rotating piece is arranged in the compression cavity in a rotating mode, the eccentric rotating piece is eccentrically arranged with the compression cavity, a sliding groove which is circumferentially arranged is formed in the eccentric rotating piece, the moving piece is slidably arranged in the sliding groove, one end of the moving piece is provided with a rolling piece, the rolling piece is rotatably arranged on the moving piece, the length of the rolling piece is equal to the thickness of the compression cavity, and after the eccentric rotating piece rotates by a preset angle, one end of the moving piece is provided with the rolling piece and extends into or extends out of the sliding groove, and the rolling piece is always in contact with the cavity wall of the compression cavity.

Description

Sliding vane type cylinder with long service life

Technical Field

The utility model relates to the technical field of air compressors, in particular to a sliding vane type air cylinder with long service life.

Background

The air compressor is a device for converting mechanical energy of a prime motor into gas pressure energy, the main process of compressing air is all generated in an air cylinder of the air compressor, and the gas is compressed by the air cylinder and is input into a compressed gas storage tank for storage. The air compressor cylinders are divided in such a way that the air is compressed inside the air compressor cylinders, including slide type cylinders.

As shown in fig. 1, a sliding vane type cylinder is known, which comprises a cylinder body 90, an eccentric member 91 and a plurality of moving members 92, wherein the cylinder body 90 is provided with a compression cavity 901, an air inlet 93 and an air outlet 94 are formed on the cavity wall of the compression cavity 901, the eccentric member 91 is rotatably installed in the compression cavity 901, the eccentric member 91 and the compression cavity 901 are eccentrically arranged, the moving members 92 are sliding vanes, the eccentric member 91 is provided with a plurality of sliding grooves 911, each sliding groove 911 is slidably provided with a sliding vane, when the eccentric member 91 rotates, the sliding vane extends into or out of the sliding groove 911 and always contacts with the cavity wall of the compression cavity 901, and in the rotation process of the eccentric member 91, the volume of a closed cavity formed by the sliding vane on one side of the air inlet 93 is gradually reduced when the closed cavity moves to the side close to the air outlet 94, and then air is compressed and discharged when the air moves to the air outlet 94. However: in the process of high-speed rotation of the eccentric member 91, the end part of the sliding vane always slides against the cavity wall of the compression cavity 901, and as the contact area at the sliding vane is always fixed, when the sliding vane type air cylinder works for a period of time, the end part of the sliding vane heats seriously and is easy to wear, and when the end part of the sliding vane is ground flat, the contact area between the end part of the sliding vane and the cavity wall of the compression cavity 901 is further increased, the heat productivity, the wear condition and the working noise are further increased, and the service life of the air cylinder is influenced; in addition, in the process that the sliding vane stretches out of or stretches into the sliding groove 911, the sliding vane is always in surface contact with the side surface of the sliding groove 911, abrasion is serious after long-term use, or the groove width of the sliding groove 911 is enlarged, or the sliding vane is thinned, when the groove width of the sliding groove 911 is enlarged or the sliding vane is thinned, the sliding vane is very easy to move in the width direction of the sliding groove 911 or cause abnormal sound in the process that the sliding vane stretches out of or stretches into the sliding groove 911, the air tightness between the two sliding vanes is influenced, the capability of the sliding vane type air cylinder for compressing air is reduced, and the service life of the sliding vane type air cylinder is influenced.

There is therefore a need to provide a sliding vane cylinder with less wear on the ends of the moving parts, less wear on the sides of the moving parts, and a longer service life.

Disclosure of Invention

The utility model mainly aims to provide a sliding vane type air cylinder with long service life, wherein the sliding vane type air cylinder with long service life comprises a cylinder body, an eccentric rotating part and a plurality of moving parts, the cylinder body is provided with a compression cavity, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the compression cavity, the eccentric rotating part is arranged in the compression cavity in a rotating mode, the central axis of the eccentric rotating part is eccentrically arranged with the central axis of the compression cavity, a plurality of sliding grooves are formed in the eccentric rotating part, the sliding grooves are arranged at intervals around the central axis of the eccentric rotating part, one moving part is slidably arranged in each sliding groove, one end of the moving part is provided with a rolling part, the rolling part is rotatably arranged on the moving part, the length of the rolling part is equal to the thickness of the compression cavity, after the eccentric rotating part rotates by a preset angle, one end of the rolling part extends into or extends out of the sliding grooves, the rolling part is always contacted with the cavity wall of the compression cavity, the rolling part is always arranged on the moving part through the central axis of the eccentric rotating part, the rolling part is always prevented from being in contact with the same moving part, and the wear of the compression cavity can be reduced, and the wear of the end can be reduced, and the end is effectively prolonged.

The sliding vane type air cylinder has the advantages that the sliding vane type air cylinder is long in service life, the two sides of each moving part are provided with the arc-shaped protrusions, when the moving parts extend into or extend out of the sliding grooves, the arc-shaped protrusions are in contact with the groove walls of the sliding grooves, friction with sliding groove lines is achieved through the arc-shaped protrusions, and compared with surface friction in the prior art, the advantages of smaller abrasion of the side faces of the moving parts and longer service life of the air cylinder are achieved.

The sliding vane type air cylinder has the advantages that the sliding vane type air cylinder is convenient to use, the sliding vane type air cylinder is easy to operate, the service life of the sliding vane type air cylinder is prolonged, and the sliding vane type air cylinder is convenient to use.

The sliding vane type air cylinder has the advantages of simple structure, convenience in operation, no complicated manufacturing process and expensive materials, high economical efficiency and easiness in popularization and use.

In order to achieve at least one of the above objects, the present utility model provides a sliding vane type cylinder having a long service life, wherein the sliding vane type cylinder having a long service life comprises:

the cylinder body is provided with a compression cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the compression cavity; and

the eccentric rotating piece is arranged in the compression cavity in a rotating manner, the central axis of the eccentric rotating piece and the central axis of the compression cavity are eccentrically arranged, the eccentric rotating piece is provided with a plurality of sliding grooves, and the sliding grooves are arranged at intervals around the central axis of the eccentric rotating piece; and

the sliding chute is characterized in that a plurality of moving parts are slidably arranged in each sliding chute, one end of each moving part is provided with a rolling part, each rolling part is rotatably arranged on each moving part, the length of each rolling part is equal to the thickness of each compression cavity, after the eccentric rotating parts rotate by a preset angle, one end of each moving part, which is provided with each rolling part, extends into or extends out of each sliding chute, and each rolling part is always in contact with the cavity wall of each compression cavity.

In one or more embodiments of the present utility model, an end of each of the moving members, which is close to the wall of the compression chamber, has an anti-drop hole with an opening, the rolling member is rotatably installed in the anti-drop hole, a maximum width dimension of the opening of the anti-drop hole is smaller than a maximum radial dimension of the rolling member, and the rolling member extends out of the opening of the anti-drop hole by a predetermined distance.

In one or more embodiments of the present utility model, a damping member is disposed at a bottom of each of the sliding grooves, and the damping member is fixedly connected to the eccentric rotating member.

In one or more embodiments of the present utility model, each of the two sides of the moving member has a plurality of arc-shaped protrusions, and when the moving member extends into or out of the sliding slot, the arc-shaped protrusions contact with the slot wall of the sliding slot.

In one or more embodiments of the present utility model, the rolling member includes a central shaft and a buffer tube, the buffer tube is sleeved on the central shaft, and the buffer tube is made of rubber.

In one or more embodiments of the utility model, the sides of the buffer cartridge have striations.

In one or more embodiments of the present utility model, the wall of the compression chamber between the air inlet and the air outlet includes a major arc region and a minor arc region, and a wear-resistant member is disposed on the major arc region, and is connected to the cylinder, and the rolling member contacts with a sidewall of the wear-resistant member or the minor arc region after the eccentric rotation member rotates by a predetermined angle.

In one or more embodiments of the present utility model, the side wall of the cylinder body has a cooling cavity, two ends of the cooling cavity are respectively provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are both communicated with the outside.

In one or more embodiments of the utility model, the cooling cavity is proximate to the minor arc region.

In one or more embodiments of the present utility model, the cylinder has a plurality of connection holes.

In the embodiment of the utility model, the sliding vane type air cylinder with long service life comprises a cylinder body, an eccentric rotating part and a moving part, wherein the cylinder body is provided with a compression cavity, an air inlet and an air outlet, the eccentric rotating part is rotationally arranged in the compression cavity and is eccentrically arranged with the compression cavity, one end of the moving part is provided with a rolling part, the rolling part is rotationally arranged on the moving part, the length of the rolling part is equal to the thickness of the compression cavity, when the eccentric rotating part rotates for a preset angle, one end of the moving part provided with the rolling part extends into or extends out of the sliding groove, and the rolling part always contacts with the cavity wall of the compression cavity.

Drawings

These and/or other aspects and advantages of the present utility model will become more apparent and more readily appreciated from the following detailed description of the embodiments of the utility model, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a prior art sliding vane cylinder;

FIG. 2 shows a schematic structural diagram of a sliding vane type cylinder with long service life according to an embodiment of the present utility model;

fig. 3 shows a schematic structural view of the moving member.

Description of the embodiments

The terms and words used in the following description and claims are not limited to literal meanings, but are used only by the inventors to enable a clear and consistent understanding of the utility model. It will be apparent to those skilled in the art, therefore, that the following description of the various embodiments of the utility model is provided for illustration only and not for the purpose of limiting the utility model as defined by the appended claims and their equivalents.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Although ordinal numbers such as "first," "second," etc., will be used to describe various components, those components are not limited herein. The term is used merely to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component, without departing from the teachings of the inventive concept. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, or groups thereof.

Summary of the application

In the process of high-speed rotation of the eccentric part, the end part of the sliding vane always slides and rubs with the cavity wall of the compression cavity, as the contact area of the sliding vane is always fixed, when the sliding vane type air cylinder works for a period of time, the end part of the sliding vane is serious in heating and easy to wear, and when the end part of the sliding vane is flattened, the contact area of the end part of the sliding vane and the cavity wall of the compression cavity is further increased, the heating value, the wearing condition and the working noise are further increased, and the service life of the air cylinder is influenced; in addition, in the process that the sliding vane stretches out or stretches into the sliding chute, the sliding vane is always in surface contact with the side surface of the sliding chute, abrasion is serious after long-term use, or the sliding chute groove width is enlarged, or the sliding vane is thinned, when the sliding chute groove width is enlarged or the sliding vane is thinned, the sliding vane is very easy to move in the width direction of the sliding chute or cause abnormal sound in the process that the sliding vane stretches out or stretches into the sliding chute, the air tightness between the two sliding vanes is influenced, the capability of the sliding vane type air cylinder for compressing air is reduced, and the service life of the sliding vane type air cylinder is influenced.

Based on the technical problems, the utility model provides the sliding vane type air cylinder with long service life, wherein the sliding vane type air cylinder with long service life has a simple structure, does not relate to complex manufacturing process and expensive materials, has higher economical efficiency, and is easy to produce, low in cost, more beneficial to control the production cost and further beneficial to product popularization and use for manufacturers.

A sliding vane type cylinder with long service life is schematically shown,

referring to fig. 2 to 3, a sliding vane type cylinder with a long service life according to a preferred embodiment of the present utility model includes a cylinder body 10, an eccentric rotating member 20 and a plurality of moving members 30.

Specifically, as shown in fig. 2, the cylinder 10 has a compression chamber 101, an air inlet 102, and an air outlet 103, the air inlet 102 and the air outlet 103 are both in communication with the compression chamber 101, and air enters the compression chamber 101 from the air inlet 102 and is discharged from the air outlet 103 after being compressed. It should be noted that, two ends of the compression chamber 101 are provided with an end cover, and the compression chamber 101 is closed by the end cover.

In addition, the eccentric rotating member 20 is rotatably disposed in the compression chamber 101, and the central axis of the eccentric rotating member 20 is eccentrically disposed with the central axis of the compression chamber 101, the eccentric rotating member 20 has a plurality of sliding grooves 201 thereon, and the sliding grooves 201 are spaced around the central axis of the eccentric rotating member 20.

In this embodiment, the number of the sliding grooves 201 is six, and the included angle between the central planes of two adjacent sliding grooves 201 is 60 °; in addition, the eccentric rotary member 20 is rotatably disposed in the compression chamber 101, including but not limited to, the eccentric rotary member 20 is fixedly mounted on a rotating shaft, one end of the rotating shaft facing away from the eccentric rotary member 20 is in power connection with an external motor, a central axis of the rotating shaft is eccentrically disposed with a central axis of the compression chamber 101, and when the external motor works, the eccentric rotary member 20 rotates in the compression chamber 101; in addition, in order to reduce the overall weight of the eccentric rotary member 20, both end surfaces of the eccentric rotary member 20 are provided with a plurality of grooves 202.

It should be noted that, in the prior art, the moving member 30 is implemented as a sliding vane, the sliding vane is slidably disposed in the sliding groove 201, when the eccentric rotating member 20 rotates, the sliding vane extends into or out of the sliding groove 201, and the sliding vane always slides and rubs with the cavity wall of the compression cavity 101, after a period of operation, the end portion of the sliding vane, which contacts with the cavity wall of the compression cavity 101, heats seriously, is easily worn, after long-term use, there is a phenomenon that the sliding vane end portion is flattened, and further reduces the service life of the cylinder, in this technical problem, the main reason that the area that causes serious heating and wearing is that the area that rubs with the cavity wall of the compression cavity 101 is always the end area of the sliding vane, and the contact area of the sliding vane is fixed.

In view of this, in the present utility model, as shown in fig. 2 and 3, each of the sliding grooves 201 is slidably provided with one of the moving members 30, one end of the moving member 30 is provided with a rolling member 301, the rolling member 301 is rotatably mounted on the moving member 30, the length of the rolling member 301 is equal to the thickness of the compression chamber 101, when the eccentric rotating member 20 rotates by a predetermined angle, one end of the moving member 30 provided with the rolling member 301 extends into or out of the sliding groove 201, and the rolling member 301 is always in contact with the wall of the compression chamber 101. Compared with the prior art, the embodiment of the utility model converts sliding friction into rolling friction, and in the process of the contact between the rolling element 301 and the cavity wall of the compression cavity 101, the contact point on the rolling element 301 is always changed, and further, the heating value and the abrasion condition are smaller than those of the sliding vane mode in the prior art, so that the whole service life of the sliding vane type air cylinder is longer, and the advantages of smaller abrasion of the end part of the moving element 30 and long service life are realized by arranging the rolling element 301 at the end part of the moving element 30.

Specifically, to realize the rolling members 301 being rotatably mounted on the moving members 30, as shown in fig. 3, one end of each moving member 30, which is close to the wall of the compression chamber 101, has a release preventing hole 302 with an opening, the rolling members 301 are rotatably mounted in the release preventing holes 302, the maximum width dimension of the opening of the release preventing hole 302 is smaller than the maximum radial dimension of the rolling members 301, and after the rolling members 301 extend into the release preventing holes 302, the side surfaces of the rolling members 301 extend out of the opening of the release preventing hole 302 by a predetermined distance and contact with the wall of the compression chamber 101.

It should be noted that, when the eccentric rotating member 20 initially rotates, each moving member 30 is thrown out of the slideway and contacts with the cavity wall of the compression cavity 101 under the action of centrifugal force, in order to prevent the moving member 30 from being damaged by the cavity wall of the compression cavity 101 when thrown out or the moving member 30 from being knocked out of the pit of the compression cavity 101 in the initial state, and cause additional vibration and abnormal sound in the working process, as shown in fig. 3, the rolling member 301 includes a central shaft 3011 and a buffer tube 3012, the buffer tube 3012 is sleeved on the central shaft 3011, the buffer tube 3012 is made of rubber, the central shaft 3011 is in interference fit with the hole on the buffer tube 3012, the central shaft 3011 is made of metal, the overall structural strength of the rolling member 301 is improved through the central shaft 3011, and the cavity wall of the rolling member 301 is prevented from being damaged through the buffer tube 3012. In addition, in order to improve the rotation stability of the rolling member 301 during the contact with the wall of the compression chamber 101, the side surface of the buffer tube 3012 has stripes.

Further, in order to prevent the moving member 30 from extending into the chute 201, an end portion of the moving member 30 near one end of the chute 201 at the bottom of the chute moves rapidly toward the bottom of the chute 201 and collides with the bottom of the chute 201, as shown in fig. 2, a shock absorbing member 2011 is disposed at the bottom of each chute 201, the shock absorbing member 2011 is fixedly connected with the eccentric rotating member 20, the fixed connection manner includes, but is not limited to, adhesive connection by using metal glue, the material of the shock absorbing member 2011 includes, but is not limited to, rubber, and when the end portion of the moving member 30 near one end of the chute 201 at the bottom of the chute moves rapidly toward the bottom of the chute 201 for a predetermined distance, the moving member 30 abuts against the shock absorbing member 2011.

It should be noted that, in the prior art, the side surface of the moving member 30 and the side surface of the sliding groove 201 are in surface friction, after long-term use, the groove width of the sliding groove 201 is increased, or the moving member 30 is thinned, so as to affect the air tightness between the two moving members 30, in this embodiment, as shown in fig. 3, each of the two sides of the moving member 30 has a plurality of arc-shaped protrusions 303, when the moving member 30 extends into or extends out of the sliding groove 201, the arc-shaped protrusions 303 are in contact with the groove wall of the sliding groove 201, and each of the arc-shaped protrusions 303 is in line contact with the groove wall of the sliding groove 201, compared with the surface contact in the prior art, the abrasion is smaller, so that the advantages of smaller abrasion of the side surface of the moving member 30 and longer service life of the sliding vane type cylinder are realized.

In addition, in view of the fact that the wall of the compression chamber 101 is a wearing part, the wear resistance and the easy replacement thereof are improved, specifically, as shown in fig. 2, the wall of the compression chamber 101 between the air inlet 102 and the air outlet 103 includes a major arc area 101A and a minor arc area 101B, the major arc area 101A is provided with a wear-resistant part 40, the wear-resistant part 40 is C-shaped, the wear-resistant part 40 is connected with the cylinder 10 in a manner of being embedded in the cylinder 10, the wear-resistant performance of the wear-resistant part 40 is higher than the wear-resistant performance of the wall of the compression chamber 101, and the implementation means include, but are not limited to, surface carburization treatment of the wear-resistant part 40, and after the eccentric rotating part 20 rotates by a predetermined angle, the rolling part 301 contacts with the side wall of the wear-resistant part 40 or the minor arc area 101B. It should be noted that, in the embodiment of the present utility model, the major arc area 101A is an actual working area, that is, during the rotation of the eccentric rotating member 20, the gas to be compressed enters the closed chamber formed by two adjacent moving members 30 on one side of the major arc area 101A near the gas inlet 102, and further rotates along with the eccentric rotating member 20, the accommodating space of the closed chamber formed by two adjacent moving members 30 becomes smaller gradually, and the gas is further compressed until the closed chamber moves to the position of the gas outlet 103, and the compressed gas is discharged from the gas outlet 103.

It is easy to see that, in this process, the minor arc area 101B is an area of non-actual compressed air, and is only a transition area when the moving member 30 moves from the air outlet 103 to the air inlet 102, so, as shown in fig. 2, the side wall of the cylinder 10 has a cooling cavity 104, two ends of the cooling cavity 104 are respectively provided with a refrigerant inlet 1041 and a refrigerant outlet 1042, the refrigerant inlet 1041 and the refrigerant outlet 1042 are both communicated with the outside, and the cooling cavity 104 is close to the minor arc area 101B. When the sliding vane type cylinder with long service life works, external refrigerant flows into the cooling cavity 104 from the refrigerant inlet 1041 and flows out from the refrigerant outlet 1042. Through setting up cooling chamber 104, the effective utilization inferior arc district 101B is to long service life's gleitbretter cylinder cools off, helps prolonging its life, reduce the temperature to moving member 30 with cylinder body 10's influence realizes the longer advantage of life. In addition, in order to facilitate the connection of the cylinder 10 with external parts, the cylinder 10 is provided with a plurality of connection holes 105.

In summary, the sliding vane type air cylinder with long service life according to the embodiment of the utility model is explained, which provides advantages of less abrasion of the end part of the moving part, less abrasion of the side surface of the moving part, longer service life and the like for the sliding vane type air cylinder with long service life.

It is worth mentioning that in the embodiment of the present utility model, the sliding vane type cylinder with long service life has a simple structure, does not involve complicated manufacturing process and expensive materials, and has high economical efficiency. Meanwhile, for manufacturers, the sliding vane type air cylinder with long service life is easy to produce, low in cost, beneficial to control of production cost and further beneficial to product popularization and use.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from such principles.

Claims (10)

1. The utility model provides a long service life's gleitbretter formula cylinder which characterized in that: the sliding vane type air cylinder with long service life comprises

The cylinder body is provided with a compression cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the compression cavity; and

the eccentric rotating piece is arranged in the compression cavity in a rotating manner, the central axis of the eccentric rotating piece and the central axis of the compression cavity are eccentrically arranged, the eccentric rotating piece is provided with a plurality of sliding grooves, and the sliding grooves are arranged at intervals around the central axis of the eccentric rotating piece; and

the sliding chute is characterized in that a plurality of moving parts are slidably arranged in each sliding chute, one end of each moving part is provided with a rolling part, each rolling part is rotatably arranged on each moving part, the length of each rolling part is equal to the thickness of each compression cavity, after the eccentric rotating parts rotate by a preset angle, one end of each moving part, which is provided with each rolling part, extends into or extends out of each sliding chute, and each rolling part is always in contact with the cavity wall of each compression cavity.

2. The long life sliding vane type cylinder as claimed in claim 1, wherein: each moving part is provided with an anti-drop hole with an opening at one end close to the cavity wall of the compression cavity, the rolling parts are rotatably arranged in the anti-drop holes, the maximum width dimension of the opening of each anti-drop hole is smaller than the maximum radial dimension of the rolling parts, and the rolling parts extend out of the openings of the anti-drop holes for a preset distance.

3. The long life sliding vane type cylinder as claimed in claim 1, wherein: the bottom of each chute is provided with a damping piece which is fixedly connected with the eccentric rotating piece.

4. The long life sliding vane type cylinder as claimed in claim 1, wherein: each moving part is provided with a plurality of arc-shaped bulges at two sides, and when the moving parts extend into or extend out of the sliding groove, the arc-shaped bulges are contacted with the wall of the sliding groove.

5. The long life sliding vane type cylinder as claimed in claim 2, wherein: the rolling piece comprises a central shaft and a buffer cylinder, wherein the buffer cylinder is sleeved on the central shaft, and the buffer cylinder is made of rubber.

6. The long life sliding vane type cylinder as claimed in claim 5, wherein: the side surface of the buffer cylinder is provided with stripes.

7. A long life sliding vane type cylinder according to any one of claims 1 to 6, characterized in that: the compression chamber comprises a main arc area and a minor arc area, wherein a wear-resistant part is arranged on the main arc area and connected with the cylinder body, and the rolling part is contacted with the side wall of the wear-resistant part or the minor arc area after the eccentric rotating part rotates for a preset angle.

8. The long life sliding vane type cylinder as claimed in claim 7, wherein: the side wall of the cylinder body is provided with a cooling cavity, two ends of the cooling cavity are respectively provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are communicated with the outside.

9. The long life sliding vane type cylinder as claimed in claim 8, wherein: the cooling cavity is adjacent to the minor arc region.

10. The long life sliding vane type cylinder as claimed in claim 7, wherein: the cylinder body is provided with a plurality of connecting holes.