CN115479035A

CN115479035A - Air sealing device and air compressor

Info

Publication number: CN115479035A
Application number: CN202211191764.4A
Authority: CN
Inventors: 曹正旭; 林伟伟; 陈健; 刘明宝; 肖旭
Original assignee: Shanghai Youshe Power Technology Co ltd
Current assignee: Shanghai Youshe Power Technology Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-16
Anticipated expiration: 2042-09-28
Also published as: CN115479035B

Abstract

The invention provides an air sealing device and an air compressor, relates to the technical field of air compressors, and solves the technical problems that in the prior art, an air compressor needs an external cooling device, the system structure is complex, the size is large, and water vapor easily enters the inner cavity of a motor. The air sealing device comprises an air compression end, a machine body and an exhaust end, wherein an air inlet channel is arranged at the first end of the machine body and is communicated with the air compression end, an exhaust channel is arranged at the second end of the machine body, high-pressure air at the air compression end enters an inner cavity of the machine body through the air inlet channel and is exhausted from the exhaust channel, and an air sealing isolation layer is formed at a gap at the second end of the machine body.

Description

Air sealing device and air compressor

Technical Field

The invention relates to the technical field of air compressors, in particular to an air sealing device and an air compressor.

Background

It is well known that the emission of non-methane organic matter and carbon monoxide from fuel-powered automobiles is a major source of atmospheric pollution, and that automobiles are also important consumers of fossil energy. In order to thoroughly solve the problem of exhaust emission of automobiles and to search for novel energy sources to replace the traditional energy sources, various countries in the world continuously strive for exploration.

Our country is a large energy consumption country, the economic development speed is high, the industrial modernization process is accelerated continuously, the demand for energy is increased at a rapid speed, the possession of automobiles is increased at an unprecedented speed, and the energy demand is continuously increased and the environmental pollution is continuously deepened as a result. In order to solve the serious problems faced at present, fuel cell technology is selected as a breakthrough, and research and development of fuel cell vehicles has become a key strategic item in the country.

In the field of new energy fuel cells, an air compressor generally adopts a high-speed motor direct-drive turbine machine to integrate the motor function and a gear speed-increasing transmission structure, and adopts an air suspension bearing to support a rotor. The high-speed direct-drive centrifugal air compressor is named as a fuel cell turbine recycling air compressor in the industry and is the most advanced product in the field of the current fuel cell air compressors.

The new energy fuel cell centrifugal air compressor is applied to new energy automobiles, so strict requirements are imposed on the structure, performance, volume, weight, stability and impact resistance of products. The air compressor of the fuel cell must be miniaturized as much as possible, and is limited by the space limitation of the automobile, the overlarge volume can occupy the larger using space in the automobile, and the larger mass increases the self weight of the automobile, which can affect the performance of the whole automobile. The air compressor must be highly efficient, unlike the conventional internal combustion engine, the energy of the exhaust gas of the fuel cell is relatively low, and the power output by the fuel cell stack has a large parasitic power of the compressor, so the air compressor needs to operate at high efficiency.

The working process of the turbine recovery air compressor of the fuel cell commonly used at present:

in the first stage, air is fed from an air compression end, high-pressure air required by the reactor reaction is obtained after primary compression, then the air compression end is discharged, and the high-pressure air is sent to the system reactor through an exhaust pipe for reaction.

And in the second stage, the waste gas after the galvanic pile reaction is conveyed to the exhaust end of the turbine, and the waste gas with residual internal energy and kinetic energy blows the turbine to rotate, so that the whole energy recovery process is completed.

In the course of the work, need external cooling water cooling motor stator, external air supply lets in the motor inner chamber with the cooling gas, and the cooling gas flows through the rotor surface, takes away the heat, then flows out from motor casing's opposite side to cooling electric machine rotor and support bearing.

However, for the turbine recycling air compressor for the fuel cell, an external air source is needed to cool the inner cavity of the motor and an air source needed for supporting the air bearing, so that a cooling device such as a cooling fan needs to be additionally arranged, and the whole system is complex in structure, large in size and heavy in mass.

Moreover, the waste gas after the reactor reaction contains a large amount of water vapor and even liquid water drops, the waste gas enters a turbine, and if the waste gas cannot obstruct and seal, the water vapor or the liquid water can enter the inner cavity of the motor. Moreover, because the clearance between the rotor and the stator of the high-speed motor is very small, the air flow of cooling air circulated by an external air source is limited, the cooling effect is not obvious, and the small clearance between the stator and the rotor of the motor causes the circulation resistance to be very large, so that the whole cooling effect is not good.

Therefore, how to solve the technical problems that the hollow press needs an external cooling device in the prior art, the system structure is complex, the volume is large, and water vapor easily enters the inner cavity of the motor is easy to cause, and the important technical problems to be solved by the personnel in the field are solved.

Disclosure of Invention

The invention aims to provide an air sealing device and an air compressor, and solves the technical problems that in the prior art, an external cooling device is required for the air compressor, the system structure is complex, the volume is large, and water vapor is easy to enter an inner cavity of a motor. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the air sealing device provided by the invention comprises an air compression end, a machine body and an exhaust end, wherein the air compression end is arranged at a first end of the machine body, an air inlet channel is arranged at the first end of the machine body, the air inlet channel is communicated with the air compression end, the exhaust end is arranged at a second end of the machine body, an exhaust channel is arranged at the second end of the machine body, high-pressure air at the air compression end enters an inner cavity of the machine body through the air inlet channel to be cooled, the high-pressure air is exhausted from the exhaust channel, and an air sealing isolation layer is formed at a gap at the second end of the machine body.

Further, the end of calming the anger includes centrifugal impeller and first spiral case, first spiral case cover is established in centrifugal impeller's the outside centrifugal impeller's circumference border position department, the lateral wall of first spiral case is pressed close to the terminal surface setting of the first end of organism to form the diffusion section, inlet channel is located the position department of diffusion section.

Further, the organism includes shell and bearing frame, the bearing frame set up in the first end of shell, the first end of shell is for being close to the tip of end of calming the anger, inlet channel set up in on the bearing frame.

Further, the organism still includes stator and rotor, the rotor with the shell looks rotation is connected, just the rotor with the end of calming the anger with the coaxial setting of exhaust end, the stator cover is established the outside circumference of rotor, just the stator with the shell is connected, the stator with be provided with the clearance between the rotor to form cooling channel.

Further, still include axial seal spare, axial seal spare set up in the tip of the second end of shell, axial seal spare is the loop type structure, the axial seal spare cover is established on the rotor, just axial seal spare with be provided with the clearance between the lateral wall of rotor, exhaust passage follows axial seal spare radially set up in the axial seal spare, the inner chamber of organism with the clearance is linked together, the clearance with exhaust passage is linked together.

Further, the exhaust end comprises a turbine and a second volute, the second volute is covered on the outer side of the turbine, and the turbine is connected to the second end of the machine body.

Further, the second spiral case is provided with the holding tank, axial seal set up in the holding tank, be provided with the exhaust hole on the lateral wall of second spiral case, axial seal clamp is established the second end of shell with between the second spiral case, just last exhaust passage of axial seal with the exhaust hole is linked together.

Further, the second end of the outer shell is provided with an end wall, the end wall is located on the inner side of the axial sealing element and is of a ring-shaped structure, and the inner side end of the end wall is close to the rotor.

Further, an accommodating cavity is formed between the end wall and the axial sealing element, a flange is arranged on the circumference of the rotor and extends into the accommodating cavity, so that the movable gap is blocked.

The air compressor provided by the invention comprises a reactor reaction cavity and the air sealing device, wherein the air compression end is communicated with the reactor reaction cavity, and the air exhaust end is communicated with the reactor reaction cavity.

Compared with the prior art, the invention has the following beneficial effects:

the air sealing device provided by the invention has the advantages that the air compressing end and the air exhausting end are respectively arranged at the two end parts of the machine body, the air inlet channel is arranged at the first end of the machine body, the air exhausting channel is arranged at the second end of the machine body, the high-pressure air pressurized at the air compressing end is directly introduced into the inner cavity of the machine body, the inner cavity of the machine body is cooled by the air with higher pressure and larger air density, the excellent cooling effect is achieved, the high-pressure cooling air is cooled in a self-circulation mode among the three components of the air compressing end, the inner cavity of the machine body and the air exhausting end, an external cooling air source is not needed, the arrangement of an external cooling device is reduced, the complexity of the system structure is greatly reduced, the structure is simpler and more attractive, the integral volume of the air compressor is reduced and the integral quality of the air compressor is lightened under the condition that the sizes of the machine bodies are the same, the high-pressure gas can make the inner cavity of the machine body have a certain high pressure after entering the relatively closed inner cavity of the machine body, and the cooled high-pressure gas is collected to the exhaust passage at the second end of the machine body to be exhausted, a certain gap is inevitably left between the second end of the machine body and the exhaust end due to the movement connection, and at the gap, because the pressure intensity in the machine body is obviously greater than the pressure intensity of the exhaust end, an air seal isolation layer can be formed by utilizing the principle of pressure intensity difference, moisture at the exhaust end can be greatly prevented from reversely entering the inner cavity of the machine body, and the air seal effect is excellent, and the cooling gas required by the inner cavity of the machine body is the high-pressure gas compressed by the air compression end, the density is high, the heat exchange effect is good, so that the cooling of the inner cavity of the machine body and the air seal effect can be realized by only needing a very small amount of cooling gas, and the proportion of the flow of the required cooling gas to the flow of the exhaust of the whole air compression end is very small, and the pressure of the gas cooled by the inner cavity of the machine body is not reduced greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view illustrating a position relationship between an air compressing end and a machine body of an air compressor according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a positional relationship between an exhaust end and a machine body of the air compressor according to the embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure and gas flow direction of a gas seal apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged view at the location of view A in FIG. 3;

FIG. 5 is a schematic view of an axial seal provided by an embodiment of the present invention.

FIG. 1-compression end; 2-body; 3-an exhaust end; 4-an intake passage; 5-an exhaust channel; 6-air sealing isolation layer; 7-centrifugal impeller; 8-a first volute; 9-a housing; 10-a bearing seat; 11-a stator; 12-a rotor; 13-a cooling channel; 14-an axial seal; 15-clearance of play; 16-a turbine; 17-a second volute; 18-a holding tank; 19-exhaust hole; 20-an end wall; 21-a containment cavity; 22-a flange; 23-reactor chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an air sealing device and an air compressor, and solves the technical problems that in the prior art, an air compressor needs an external cooling device, the system structure is complex, the size is large, and water vapor easily enters the inner cavity of a motor.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

The technical solution of the present invention will be described in detail with reference to specific examples.

Example 1:

referring to fig. 1-4, the gas sealing device provided in this embodiment includes an air compressing end 1, a machine body 2, and an exhaust end 3, where the air compressing end 1 is disposed at a first end of the machine body 2, and the first end of the machine body 2 is provided with an air inlet channel 4, and the air inlet channel 4 is communicated with the air compressing end 1, so that the air inlet channel 4 can introduce the high-pressure air pressurized by the air compressing end 1 into an inner cavity of the machine body 2. The exhaust end 3 is disposed at the second end of the body 2, and the second end of the body 2 is provided with an exhaust passage 5, so that the high-pressure gas cooled by the inner cavity of the body 2 is led out to the outside of the body 2. Wherein, the high-pressure gas of the air compressing end 1 enters the inner cavity of the machine body 2 through the air inlet channel 4 to be cooled, and the high-pressure gas is discharged from the air outlet channel 5, and an air seal isolating layer 6 is formed at the gap of the second end of the machine body 2, namely, the high-pressure gas circularly flows in the directions of the air compressing end 1, the inner cavity of the machine body 2 and the air outlet end 3, referring to fig. 3, the high-pressure gas enters from the port a and flows out from the port b, the invention is arranged in such a way that the high-pressure gas pressurized by the air compressing end 1 is directly introduced into the inner cavity of the machine body 2, the inner cavity of the machine body 2 is cooled by the gas with higher pressure and larger gas density, thereby having excellent cooling effect, the high-pressure cooling gas is cooled by self-circulation among the three components of the air compressing end 1, the inner cavity of the machine body 2 and the air outlet end 3, and no external cooling gas source is needed, thereby reducing the layout of an external cooling device and greatly reducing the complexity of the system structure, the structure is simpler and more beautiful, under the condition that models of the machine bodies 2 are the same, the whole volume of the air compressor is reduced, the whole quality of the air compressor is lightened, in addition, high-pressure gas can also have certain high pressure after entering the inner cavity of the machine body 2 which is relatively closed, the cooled high-pressure gas is collected to the exhaust passage 5 at the second end of the machine body 2 to be exhausted, a certain gap is inevitably reserved between the second end of the machine body 2 and the exhaust end 3 because of the requirement of moving connection, at the gap, because the pressure in the machine body 2 is obviously greater than the pressure of the exhaust end 3, a gas seal isolation layer can be formed by utilizing the principle of pressure difference, moisture at the exhaust end 3 can be greatly prevented from reversely entering the inner cavity of the machine body 2, the air seal effect is excellent, and the cooling gas required by the inner cavity of the machine body 2 is the high-pressure gas compressed by the air compressing end 1, the density is big and the heat transfer is effectual, therefore only need very few volume just can realize the cooling of 2 inner chambers of organism and realize the atmoseal effect, the required cooling gas flow accounts for the proportion of whole end 1 carminative flow of calming anger very little, and the gas pressure after 2 inner chambers of organism cooling reduces not greatly and still can carry out cyclic utilization through the circulation honeycomb duct, consequently the cooling power consumption that corresponds is very little, it needs external cooling device to have solved the cavity press of prior art, easily lead to the technical problem that the complicated volume of system architecture is bigger than normal and steam easily gets into the motor inner chamber.

Example 2:

referring to fig. 1 to 4, the present embodiment further defines the structure of the gas seal apparatus on the basis of embodiment 1. The air compressing end 1 comprises a centrifugal impeller 7 and a first volute 8, and the first volute 8 is covered on the outer side of the centrifugal impeller 7 so as to guide the air flow. At centrifugal impeller 7's circumference border position department, the terminal surface setting of the first end of organism 2 is pressed close to the lateral wall of first spiral case 8, in order to form the diffusion section, the outside circumference at centrifugal impeller 7 is enclosed to the diffusion section, inlet channel 4 is located the position department of diffusion section, so set up, after external gas compressed through centrifugal impeller 7 high-speed rotation, can be through the narrow flat clearance of diffusion section with the kinetic energy of air current transformation pressure energy, and transmit to the inner chamber of organism 2 in through inlet channel 4, can reduce the energy loss of centrifugal impeller 7 department.

As an optional implementation manner of the embodiment of the present invention, the machine body 2 includes a housing 9 and a bearing seat 10, the bearing seat 10 is disposed at a first end of the housing 9, the first end of the housing 9 is an end portion close to the air compressing end 1, and the air intake channel 4 is disposed on the bearing seat 10, so that the bearing seat 10 is fixedly connected with the first end of the housing 9, a bearing may be disposed inside the bearing seat 10 to rotatably support the rotor 12, and the air intake channel 4 is directly opened on the bearing seat 10, which can reduce additional arrangement of other components, and reduce the overall volume and weight of the machine body 2.

Further, the machine body 2 further comprises a stator 11 and a rotor 12, the rotor 12 is rotatably connected with the housing 9, and the rotor 12 is coaxially arranged with the air compressing end 1 and the air exhausting end 3, that is, two ends of the rotor 12 can extend out of the housing 9, a first end of the rotor 12 can be connected with the centrifugal impeller 7, a second end of the rotor 12 can be connected with the turbine 16, and the rotor 12 can coaxially and synchronously rotate with the centrifugal impeller 7 and the turbine 16, so that the power transmission structure of the air compressor is simplified, the stability of mechanical motion transmission can be greatly enhanced, and the operation efficiency of the air compressor can be improved. Stator 11 cover is established in the outside circumference of rotor 12, and stator 11 is connected with shell 9, is provided with the clearance between stator 11 and the rotor 12 to form cooling channel 13, so that high-pressure gas can pass through cooling channel 13's water conservancy diversion effect after getting into the inner chamber of shell 9 by inlet channel 4, make high-pressure gas can be a large amount of smooth and easy passing through between rotor 12 and stator 11, in order to cool off stator 11 and rotor 12 more high-efficiently, improved the cooling effect to stator 11 and rotor 12.

Further, referring to fig. 3-5, the gas sealing device further includes an axial sealing member 14, the axial sealing member 14 is disposed at an end of the second end of the housing 9, the axial sealing member 14 is of a ring structure, the axial sealing member 14 is sleeved on the rotor 12, and a movable gap 15 is disposed between the axial sealing member 14 and a side wall of the rotor 12, so that the axial sealing member 14 is separated from the rotor 12, the axial sealing member 14 is prevented from contacting the rotor 12, a rotational damping of the rotor 12 is increased, and the rotor 12 rotates more smoothly. The exhaust passage 5 is arranged in the axial sealing element 14 along the radial direction of the axial sealing element 14, the inner cavity of the machine body 2 is communicated with the movable gap 15, the movable gap 15 is communicated with the exhaust passage 5, namely, the air inlet end of the exhaust passage 5 is communicated with the movable gap 15 and further communicated with the inner cavity of the machine body 2, and the air outlet end of the exhaust passage 5 can be communicated to the outside or can be communicated with the edge of the exhaust end 3, so that high-pressure gas in the inner cavity of the shell 9 can be smoothly exhausted. The high-pressure gas in the inner cavity of the shell 9 has higher pressure and certain temperature, the high-pressure gas is discharged after passing through the movable gap 15 and the exhaust channel 5 in sequence, and the high-pressure gas can form a high-pressure gas seal layer at the position of the movable gap 15, so that the waste gas of the exhaust end 3 with vapor or liquid water drops can not enter the inner cavity of the machine body 2, namely, the air seal isolation layer 6 is established by the self-circulating high-pressure gas, the vapor is prevented from entering the inner cavity of the machine body 2, and the problem of sealing the inner cavity of the machine body 2 of the air compressor is solved.

Further, the exhaust end 3 includes a turbine 16 and a second volute 17, the second volute 17 covers the outside of the turbine 16, and the turbine 16 is connected to the second end of the machine body 2, so that the turbine 16 can rotate at a high speed in the second volute 17, and the gas in the second volute 17 is pressurized and discharged to the outside, so that the gas after reaction can be discharged smoothly.

Further, the second volute 17 is provided with an accommodating groove 18, the axial sealing element 14 is arranged in the accommodating groove 18, a vent hole 19 is formed in the side wall of the second volute 17, the axial sealing element 14 is clamped between the second end of the outer shell 9 and the second volute 17, and the vent channel 5 on the axial sealing element 14 is communicated with the vent hole 19, so that high-pressure gas in the vent channel 5 can be smoothly discharged to the outside.

As an optional implementation manner of the embodiment of the present invention, the second end of the housing 9 is provided with an end wall 20, the end wall 20 is located inside the axial seal 14, the end wall 20 is of a ring-shaped structure, and the inside end of the end wall 20 is located close to the rotor 12, so that the end wall 20 and the bearing seat 10 can be respectively enclosed at two ends of the housing 9 in a sealing manner, so that the end wall 20, the bearing seat 10 and the housing 9 can jointly enclose a relatively sealed cavity, the rotor 12 and the stator 11 are located in the relatively sealed cavity, the stator 11 and the rotor 12 can be sufficiently cooled by high-pressure gas, pressure loss of the high-pressure gas can be reduced, and the end wall 20 can shield and protect the stator 11 and the rotor 12 to reduce damage by foreign objects.

Further, a containing cavity 21 is arranged between the end wall 20 and the axial sealing element 14, a flange 22 is arranged in the circumferential direction of the rotor 12, the flange 22 extends into the containing cavity 21 to form a blocking device for the movable gap 15, so that the flange 22 can play a certain limiting and fixing role for the rotor 12, the flange 22 can shield and protect the gap between the end wall 20 and the rotor 12 and the movable gap 15 between the axial sealing element 14 and the rotor 12 in the axial direction to form labyrinth shielding, external dust or impurities can be reduced from directly entering the inner cavity of the housing 9 to damage the stator 11 and the rotor 12, and the flange 22 can guide high-pressure gas, so that the high-pressure gas can be filled in the containing cavity 21 between the end wall 20 and the axial sealing element 14, the pressure loss of the high-pressure gas is reduced, a sufficient pressure value can be maintained at the movable gap 15 between the axial sealing element 14 and the rotor 12, and the gas sealing effect of the gas sealing and isolation layer 6 is improved.

As an optional implementation manner of the embodiment of the present invention, the present invention further includes a reactor cavity 23, the gas compression end 1 is communicated with the reactor cavity 23, and the gas exhaust end 3 is communicated with the reactor cavity 23, so that the first volute 8 of the gas compression end 1 can supply high-pressure gas into the reactor cavity 23,

example 3:

referring to fig. 1-5, the air compressor provided in this embodiment includes a reactor cavity 23 and the above-mentioned gas sealing device, the gas compression end 1 is communicated with the reactor cavity 23, and the gas exhaust end 3 is communicated with the reactor cavity 23, so as to set up, the inner cavity of the machine body 2 can be a relatively closed space, the gas compression end 1 compresses gas in a first stage, and sends high-pressure and high-density gas into the reactor cavity 23 through the gas inlet channel 4 to participate in chemical reaction, thereby consuming oxygen in the gas, and after waste gas after chemical reaction in the reactor cavity 23 is removed by system separation, waste gas still having great kinetic energy and internal energy is sent to the gas exhaust end 3, and the turbine 16 blowing the gas exhaust end 3 rotates to exhaust. End 1 of calming anger lets in the gas of high pressure high density in to organism 2 inner chamber through inlet channel 4, can enough satisfy the heat dissipation cooling needs of organism 2 inner chamber self, also can form the atmoseal effect of atmoseal isolation layer 6 with the moisture intersection of exhaust end 3 at the second end of organism 2 inner chamber, the pressure of the high-pressure gas in the 2 inner chambers of organism will be higher than the pressure of the moisture of exhaust end 3, thereby can block the moisture of exhaust end 3, avoid the moisture to get into the inner chamber of organism 2.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a gas seal device, its characterized in that, is including pressing gas end (1), organism (2) and exhaust end (3), press gas end (1) set up in the first end of organism (2), just the first end of organism (2) is provided with inlet channel (4), inlet channel (4) with it is linked together to press gas end (1), exhaust end (3) set up in the second end of organism (2), just the second end of organism (2) is provided with exhaust passage (5), wherein, the high-pressure gas warp of pressing gas end (1) inlet channel (4) get into the inner chamber of organism (2) cools off, just high-pressure gas follows exhaust passage (5) are located to discharge, and organism (2) second end's clearance department forms gas seal isolation layer (6).

2. Gas seal device according to claim 1, characterized in that the compression end (1) comprises a centrifugal impeller (7) and a first volute (8), the first volute (8) being housed outside the centrifugal impeller (7), the side wall of the first volute (8) being arranged proximate to the end face of the first end of the body (2) at the location of the circumferential edge of the centrifugal impeller (7) to form a diffuser section, the gas inlet channel (4) being located at the location of the diffuser section.

3. Air sealing device according to claim 1, characterized in that the machine body (2) comprises a housing (9) and a bearing seat (10), the bearing seat (10) being arranged at a first end of the housing (9), the first end of the housing (9) being the end close to the air compression end (1), the air intake channel (4) being arranged on the bearing seat (10).

4. The air sealing device according to claim 3, wherein the machine body (2) further comprises a stator (11) and a rotor (12), the rotor (12) is rotatably connected with the housing (9), the rotor (12) is coaxially arranged with the air compressing end (1) and the air exhausting end (3), the stator (11) is sleeved on the outer circumferential direction of the rotor (12), the stator (11) is connected with the housing (9), and a gap is arranged between the stator (11) and the rotor (12) to form the cooling channel (13).

5. The gas sealing device according to claim 4, further comprising an axial sealing member (14), wherein the axial sealing member (14) is disposed at an end of the second end of the housing (9), the axial sealing member (14) is of a ring-shaped structure, the axial sealing member (14) is sleeved on the rotor (12), a movable gap (15) is disposed between the axial sealing member (14) and a side wall of the rotor (12), the exhaust channel (5) is disposed in the axial sealing member (14) along a radial direction of the axial sealing member (14), an inner cavity of the machine body (2) is communicated with the movable gap (15), and the movable gap (15) is communicated with the exhaust channel (5).

6. Gas seal arrangement according to claim 5, characterized in that the exhaust end (3) comprises a turbine (16) and a second volute (17), the second volute (17) being housed outside the turbine (16), the turbine (16) being connected to the second end of the machine body (2).

7. Gas seal arrangement according to claim 6, characterized in that the second volute (17) is provided with a receiving groove (18), the axial seal (14) is provided within the receiving groove (18), a discharge hole (19) is provided on a side wall of the second volute (17), the axial seal (14) is sandwiched between the second end of the housing (9) and the second volute (17), and a discharge channel (5) on the axial seal (14) communicates with the discharge hole (19).

8. Air seal according to claim 5, characterized in that the second end of the housing (9) is provided with an end wall (20), the end wall (20) being located inside the axial seal (14), the end wall (20) being of annular configuration, the inner end of the end wall (20) being located close to the rotor (12).

9. Gas seal device according to claim 8, characterized in that a receiving cavity (21) is provided between the end wall (20) and the axial seal (14), and a flange (22) is provided in the circumferential direction of the rotor (12), said flange (22) projecting into the receiving cavity (21) to form a stop for the running clearance (15).

10. Air compressor, characterized in that, includes a reactor cavity (23) and a gas seal device according to any one of claims 1-9, the gas compression end (1) is communicated with the reactor cavity (23), and the gas exhaust end (3) is communicated with the reactor cavity (23).