CN218266478U - Internal sealing structure of high-speed centrifugal air compressor and expansion machine integrated device - Google Patents
Internal sealing structure of high-speed centrifugal air compressor and expansion machine integrated device Download PDFInfo
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- CN218266478U CN218266478U CN202222549739.0U CN202222549739U CN218266478U CN 218266478 U CN218266478 U CN 218266478U CN 202222549739 U CN202222549739 U CN 202222549739U CN 218266478 U CN218266478 U CN 218266478U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
An internal sealing structure of a high-speed centrifugal air compressor and expander integrated device is characterized in that a thrust disc is mounted on a rotor between a compression end diffuser and a compression end bearing seat, a compression end sealing lantern ring is mounted on the rotor between a compression impeller and the thrust disc, a compression end sealing groove matched with the compression end sealing lantern ring is formed in the inner hole wall of the compression end diffuser, and the outer edge of the compression end sealing lantern ring is inserted into the compression end sealing groove and is in clearance fit with the compression end diffuser to form a clearance sealing structure; an expansion end sealing lantern ring is installed on a rotor between the expansion impeller and the expansion end bearing seat, an expansion end sealing groove matched with the expansion end sealing lantern ring is formed in the inner hole wall of the expansion end guider, and the outer edge of the expansion end sealing lantern ring is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider to form a clearance sealing structure. The gas in the compression cavity can be prevented from leaking to the motor cavity, and the compression ratio and the compression efficiency are improved; avoid causing the corruption to stator and rotor, guaranteed the life of motor.
Description
The technical field is as follows:
the utility model relates to a high-speed centrifugal air compressor machine and expander integrated device's inside seal structure.
Background art:
at present, the development of new energy fuel cell automobiles is considered as an important link of traffic energy power conversion, in order to ensure the normal work of a fuel cell engine, the engine generally needs auxiliary systems such as a hydrogen supply subsystem, an air supply subsystem and a circulating water cooling management subsystem, and a large number of researches show that the high-pressure and large-flow air supply has an obvious effect of improving the power output of the existing fuel cell engine. Therefore, before air enters the engine, the air intake is pressurized, and a centrifugal air compressor is an energy conversion device for achieving the aim, and is one of important parts of an air supply system of a fuel cell engine.
The applicant filed a patent application with publication number CN114893419A entitled single-stage high-speed centrifugal air compressor and expander integrated system in 23/5/2022, and disclosed a structural form of integrating an air compressor and an expander, and when the system is used specifically, the applicant finds that gas in a compression cavity is easy to leak into a motor cavity, which reduces compression efficiency, and gas in an expansion cavity is easy to leak into the motor cavity, which corrodes a stator and a rotor of the motor and affects the service life of the motor. Because the rotor rotates at a high speed during working, a common contact type sealing ring is easy to abrade, the heating is serious, the gap is increased, and the sealing failure is caused.
In conclusion, the sealing problem between the compression cavity and the motor cavity and between the expansion cavity and the motor cavity becomes a technical problem to be solved urgently in the industry.
The utility model has the following contents:
the utility model discloses a remedy prior art not enough, provide a high-speed centrifugal air compressor machine and expander integrated device's inside seal structure, solved the gas in the compression intracavity and leaked the problem that causes compression efficiency to reduce to the motor intracavity, solved the gas in the expansion intracavity and leaked the problem that causes the corruption to stator and rotor to the motor intracavity.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
an internal sealing structure of a high-speed centrifugal air compressor and expander integrated device comprises a motor shell, a stator and a rotor, wherein a compression end bearing seat and an expansion end bearing seat for supporting the rotor are respectively installed on the inner sides of two ends of the motor shell;
the compression device comprises a compression impeller arranged on the rotor, a compression volute connected with the motor shell is arranged on the outer side of the compression impeller, a compression volute is arranged in the compression volute, and a compression air inlet and a compression air outlet are formed in the compression volute;
the expansion machine comprises an expansion impeller arranged on the rotor, an expansion volute connected with the motor shell is arranged on the outer side of the expansion impeller, an expansion volute is arranged in the expansion volute, and an expansion air inlet and an expansion air outlet are formed in the expansion volute;
a thrust disc is arranged on the rotor between the compression end diffuser and the compression end bearing seat, a compression end sealing sleeve ring is arranged on the rotor between the compression impeller and the thrust disc, a compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, and the outer edge of the compression end sealing sleeve ring is inserted in the compression end sealing groove and is in clearance fit with the compression end diffuser to form a clearance sealing structure;
an expansion end sealing lantern ring is installed on the rotor between the expansion impeller and the expansion end bearing seat, an expansion end sealing groove matched with the expansion end sealing lantern ring is formed in the inner hole wall of the expansion end guider, and the outer edge of the expansion end sealing lantern ring is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider to form a clearance sealing structure.
The outer end face of the compression end diffuser is connected with a compression end sealing cover plate through a screw, and a compression end sealing groove is formed between the compression end sealing cover plate and the compression end diffuser.
The outer end face of the expansion end guider is connected with an expansion end sealing cover plate through a screw, and an expansion end sealing groove is formed between the expansion end sealing cover plate and the expansion end guider.
The compression end sealing lantern ring compresses the thrust disc on the stepped end face of one end of the rotor, the compression impeller compresses the compression end sealing lantern ring on the end face of the thrust disc, and the outer end of the compression impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
The expansion impeller compresses the expansion end sealing lantern ring on the stepped end face at the other end of the rotor, and the outer end of the expansion impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
The utility model adopts the above technical scheme, have following advantage:
by adding the compression end sealing sleeve ring, the compression end sealing sleeve ring rotates at a high speed along with the rotor, and the compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, so that a labyrinth type gap sealing structure is formed, gas in a compression cavity can be prevented from leaking into a motor cavity, and the compression ratio and the compression efficiency are improved; through increasing the sealed lantern ring of inflation end, the sealed lantern ring of inflation end is rotatory along with the rotor is high-speed to set up on the inner hole wall of inflation end director and expand end seal ring matched with inflation end seal groove, form labyrinth clearance seal structure, can prevent that the gas in the inflation intracavity from leaking to the motor intracavity, avoid causing the corruption to stator and rotor, guaranteed the life of motor.
Description of the drawings:
fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a schematic perspective view of the rotor assembly of the present invention.
In the figure, 1, a motor shell, 2, a stator, 3, a rotor, 4, a compression end bearing seat, 5, an expansion end bearing seat, 6, a compression end diffuser, 7, an expansion end guider, 8, a compression impeller, 9, a compression volute, 10, a compression volute, 11, a compression air inlet, 12, a compression air outlet, 13, an expansion impeller, 14, an expansion volute, 15, an expansion volute, 16, an expansion air inlet, 17, an expansion air outlet, 18, a thrust disc, 19, a compression end sealing sleeve ring, 20, an expansion end sealing sleeve ring, 21, a compression end sealing cover plate, 22, an expansion end sealing cover plate, 23 and a compression nut.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
As shown in fig. 1-2, an internal sealing structure of an integrated device of a high-speed centrifugal air compressor and an expander comprises a motor casing 1, a stator 2 and a rotor 3, wherein a compression end bearing seat 4 and an expansion end bearing seat 5 for supporting the rotor 3 are respectively installed on the inner sides of two ends of the motor casing 1, a compression end diffuser 6 and an expansion end guider 7 are respectively installed on the outer sides of two ends of the motor casing 1, one end of the rotor 3 penetrates through the compression end diffuser 6 to be installed with a compression device, and the other end of the rotor 3 penetrates through the expansion end guider 7 to be installed with an expander;
the compression device comprises a compression impeller 8 arranged on the rotor 3, a compression volute 9 connected with the motor shell 1 is arranged on the outer side of the compression impeller 8, a compression volute channel 10 is arranged in the compression volute 9, and a compression air inlet 11 and a compression air outlet 12 are arranged on the compression volute 9;
the expansion machine comprises an expansion impeller 13 arranged on the rotor 3, an expansion volute 14 connected with the motor shell 1 is arranged on the outer side of the expansion impeller 13, an expansion volute channel 15 is arranged inside the expansion volute 14, and an expansion air inlet 16 and an expansion air outlet 17 are arranged on the expansion volute 14;
a thrust disc 18 is arranged on the rotor 3 between the compression end diffuser 6 and the compression end bearing seat 4, a compression end sealing sleeve ring 19 is arranged on the rotor 3 between the compression impeller 8 and the thrust disc 18, a compression end sealing groove matched with the compression end sealing sleeve ring 19 is arranged on the inner hole wall of the compression end diffuser 6, and the outer edge of the compression end sealing sleeve ring 19 is inserted in the compression end sealing groove and is in clearance fit with the compression end diffuser 6 to form a labyrinth clearance sealing structure;
an expansion end sealing sleeve ring 20 is mounted on the rotor 3 between the expansion impeller 13 and the expansion end bearing seat 5, an expansion end sealing groove matched with the expansion end sealing sleeve ring 20 is formed in the inner hole wall of the expansion end guider 7, and the outer edge of the expansion end sealing sleeve ring 20 is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider 7 to form a labyrinth clearance sealing structure.
The outer end face of the compression end diffuser 6 is connected with a compression end sealing cover plate 21 through a screw, a compression end sealing groove is formed between the compression end sealing cover plate 21 and the compression end diffuser 6, and the compression end sealing cover plate 21 can be detached, so that the compression end sealing sleeve ring 19 is convenient to assemble.
The outer end face of the expansion end guider 7 is connected with an expansion end sealing cover plate 22 through a screw, an expansion end sealing groove is formed between the expansion end sealing cover plate 22 and the expansion end guider 7, and the expansion end sealing cover plate 22 can be detached, so that the expansion end sealing sleeve ring 20 is convenient to assemble.
The compression end sealing sleeve ring 19 compresses the thrust disk 18 on the stepped end face at one end of the rotor 3, the compression impeller 8 compresses the compression end sealing sleeve ring 19 on the end face of the thrust disk 18, and the outer end of the compression impeller 8 is compressed and fixed by a compression nut 23 which is installed on the rotor 3 through threads.
The expansion impeller 13 presses the expansion end sealing collar 20 onto the stepped end face at the other end of the rotor 3, and the outer end of the expansion impeller 13 is pressed and fixed by a pressing nut 23 which is installed on the rotor 3 through threads.
The working principle is as follows:
when the air compressor works, the rotor 3 drives the compression impeller 8 to rotate at a high speed, air enters from the compression end air inlet 11, is discharged from the compression end air outlet 12 after being pressurized in the compression volute 10, and conveys high-pressure air to a fuel cell, the compression end sealing lantern ring 19 rotates at a high speed along with the rotor 3, the outer edge of the compression end sealing lantern ring 19 is inserted into the compression end sealing groove and is in clearance fit with the compression end diffuser 6 and the compression end sealing cover plate 21 to form a labyrinth clearance sealing structure, the air in the compression cavity hardly enters the motor cavity through a clearance, the gas in the compression cavity can be prevented from leaking into the motor cavity, and the compression ratio and the compression efficiency are improved;
the high-pressure gas of fuel cell pile exhaust gets into the expander from inflation end air inlet 16, it is rotatory to drive inflation impeller 13 through inflation spiral way 15, inflation impeller 13 is used for retrieving fuel cell pile combustion gas energy, provide the helping hand for rotor 3, gas is discharged from inflation end air outlet 17 at last, the outward flange cartridge of inflation end sealing collar 20 forms the clearance seal structure of labyrinth with inflation end director 7 and the sealed apron 22 clearance fit of inflation end in the inflation end seal groove, gas in the inflation intracavity is difficult to get into the motor intracavity portion through the clearance, can prevent that the gas in the inflation intracavity from leaking to the motor intracavity, avoid causing the corruption to stator 2 and rotor 3, the life of motor has been guaranteed.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (5)
1. The utility model provides a high-speed centrifugal air compressor machine and expander integrated device's inside seal structure which characterized in that: the compressor comprises a motor shell, a stator and a rotor, wherein a compression end bearing seat and an expansion end bearing seat for supporting the rotor are respectively installed on the inner sides of two ends of the motor shell, a compression end diffuser and an expansion end guider are respectively installed on the outer sides of two ends of the motor shell, one end of the rotor penetrates through the compression end diffuser to be installed with a compression device, and the other end of the rotor penetrates through the expansion end guider to be installed with an expansion machine;
the compression device comprises a compression impeller arranged on the rotor, a compression volute connected with the motor shell is arranged on the outer side of the compression impeller, a compression volute channel is arranged in the compression volute, and a compression air inlet and a compression air outlet are formed in the compression volute;
the expansion machine comprises an expansion impeller arranged on the rotor, an expansion volute connected with the motor shell is arranged on the outer side of the expansion impeller, an expansion volute is arranged in the expansion volute, and an expansion air inlet and an expansion air outlet are formed in the expansion volute;
a thrust disc is arranged on the rotor between the compression end diffuser and the compression end bearing seat, a compression end sealing sleeve ring is arranged on the rotor between the compression impeller and the thrust disc, a compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, and the outer edge of the compression end sealing sleeve ring is inserted in the compression end sealing groove and is in clearance fit with the compression end diffuser to form a clearance sealing structure;
an expansion end sealing lantern ring is installed on the rotor between the expansion impeller and the expansion end bearing seat, an expansion end sealing groove matched with the expansion end sealing lantern ring is formed in the inner hole wall of the expansion end guider, and the outer edge of the expansion end sealing lantern ring is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider to form a clearance sealing structure.
2. The internal sealing structure of the high-speed centrifugal air compressor and expander integrated device according to claim 1, wherein: the outer end face of the compression end diffuser is connected with a compression end sealing cover plate through a screw, and a compression end sealing groove is formed between the compression end sealing cover plate and the compression end diffuser.
3. The internal sealing structure of the high-speed centrifugal air compressor and expander integrated device according to claim 1, wherein: the outer end face of the expansion end guider is connected with an expansion end sealing cover plate through a screw, and an expansion end sealing groove is formed between the expansion end sealing cover plate and the expansion end guider.
4. The internal sealing structure of the integrated device of the high-speed centrifugal air compressor and the expansion machine as claimed in claim 1, wherein: the compression end sealing lantern ring compresses the thrust disc on the stepped end face of one end of the rotor, the compression impeller compresses the compression end sealing lantern ring on the end face of the thrust disc, and the outer end of the compression impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
5. The internal sealing structure of the high-speed centrifugal air compressor and expander integrated device according to claim 1, wherein: the expansion impeller compresses the expansion end sealing lantern ring on the stepped end face at the other end of the rotor, and the outer end of the expansion impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222549739.0U CN218266478U (en) | 2022-09-26 | 2022-09-26 | Internal sealing structure of high-speed centrifugal air compressor and expansion machine integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222549739.0U CN218266478U (en) | 2022-09-26 | 2022-09-26 | Internal sealing structure of high-speed centrifugal air compressor and expansion machine integrated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218266478U true CN218266478U (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222549739.0U Active CN218266478U (en) | 2022-09-26 | 2022-09-26 | Internal sealing structure of high-speed centrifugal air compressor and expansion machine integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218266478U (en) |
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2022
- 2022-09-26 CN CN202222549739.0U patent/CN218266478U/en active Active
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