CN219452487U - Hydrogen circulating pump with shaft seal - Google Patents
Hydrogen circulating pump with shaft seal Download PDFInfo
- Publication number
- CN219452487U CN219452487U CN202223040025.3U CN202223040025U CN219452487U CN 219452487 U CN219452487 U CN 219452487U CN 202223040025 U CN202223040025 U CN 202223040025U CN 219452487 U CN219452487 U CN 219452487U
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- CN
- China
- Prior art keywords
- cavity
- impeller
- rotor
- cylindrical wall
- shaft seal
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Classifications
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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
The utility model discloses a hydrogen circulating pump with a shaft seal, which comprises: the motor comprises a pump shell, wherein a rotor cavity, an impeller cavity and a stator cavity are arranged in the pump shell, the stator cavity surrounds the outer side of the rotor cavity, a motor stator is fixed in the stator cavity, a motor rotor is rotatably arranged in the rotor cavity through a bearing, a through hole is formed in a partition wall between the rotor cavity and the impeller cavity, an impeller is arranged in the impeller cavity, one end of a shaft where the motor rotor is located penetrates through the through hole and stretches into the impeller cavity to be fixed with the impeller, and a shaft seal is arranged in the through hole. The hydrogen circulating pump seals the gap between the shaft where the motor rotor is located and the through hole by replacing the bearing with the shaft seal, so that the bearing is of a common type, and the problems of high cost and low reliability of the bearing are solved.
Description
Technical Field
The present utility model relates to hydrogen fuel cell systems, and more particularly to a hydrogen circulation pump with a shaft seal for use in a hydrogen fuel cell system.
Background
Hydrogen fuel cell systems that utilize electrochemical reaction of hydrogen gas with an oxidant to generate electricity are increasingly being used to provide electricity, particularly in the field of electric vehicles. During operation of the hydrogen fuel cell system, product water, unconsumed hydrogen and ineffective nitrogen may accumulate at the output of the anode side of the fuel cell stack. Unconsumed hydrogen is generally recycled by a hydrogen circulation pump to be reused, thereby improving the operation efficiency of the hydrogen fuel cell system.
The structure of the hydrogen circulation pump includes: the motor comprises a pump shell, wherein a rotor cavity, an impeller cavity and a stator cavity are arranged in the pump shell, the stator cavity surrounds the outer side of the rotor cavity, the stator cavity and the rotor cavity are sealed through a sealing structure, a motor stator is fixed in the stator cavity, a motor rotor is rotatably arranged in the rotor cavity through a bearing, the rotor cavity and the impeller cavity are communicated through a through hole, one end of the motor rotor penetrates through the through hole and stretches into the impeller cavity, an impeller is arranged in the impeller cavity, and the impeller is fixedly sleeved on the end part of the motor rotor stretching into the impeller cavity, so that the motor rotor can drive the impeller to rotate. The impeller can drive unconsumed hydrogen to flow and circulate after rotating.
Besides hydrogen, the impeller cavity is filled with water generated by electrochemical reaction, and the water is usually dynamically sealed by using a bearing with high sealing performance, which is close to a through hole, on a motor rotor, so that the water is prevented from entering the rotor cavity, the bearing with high sealing performance has higher cost and quicker temperature rise, abrasion is easy to generate, and particles generated by abrasion pollute grease and influence the reliability and service life of the bearing.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the hydrogen circulating pump with the shaft seal has low cost and can reliably seal water.
In order to solve the problems, the utility model adopts the following technical scheme: a hydrogen circulation pump with shaft seal comprising: the motor comprises a pump shell, a rotor cavity, an impeller cavity and a stator cavity are arranged in the pump shell, the stator cavity surrounds the outer side of the rotor cavity, a motor stator is fixed in the stator cavity, a motor rotor is rotatably arranged in the rotor cavity through a bearing, a through hole is formed in a partition wall between the rotor cavity and the impeller cavity, an impeller is arranged in the impeller cavity, and one end of a shaft where the motor rotor is located penetrates through the through hole and stretches into the impeller cavity to be fixed with the impeller, so that the motor rotor can drive the impeller to rotate, and the motor rotor is characterized in that: a shaft seal sleeved on the shaft where the motor rotor is located is arranged in the through hole, and can seal a gap between the shaft where the motor rotor is located and the through hole so as to prevent water in the impeller cavity from entering the rotor cavity.
Further, the aforementioned hydrogen circulation pump with shaft seal, wherein: the shaft seal structure includes: the outer cylindrical wall, the inner cylindrical wall, well connecting wall, outer cylindrical wall suit is in the outside of inner cylindrical wall, the inner of outer cylindrical wall is connected through well connecting wall with the inner of inner cylindrical wall, be provided with on the inboard of inner cylindrical wall and be used for sealing with the laminating of axle mutually, still be provided with an L shape tensioning ring and an O shape tensioning ring, two limits of L shape tensioning ring are located outer cylindrical wall and well connecting wall respectively, O shape tensioning ring is fixed in on the outside of inner cylindrical wall, can make outer cylindrical wall and pore wall hug closely under L shape tensioning ring and O shape tensioning ring's effect, can make sealing lip on the inner cylindrical wall hug closely with the axle mutually.
Further, the aforementioned hydrogen circulation pump with shaft seal, wherein: the sealing lips on the shaft seal are provided with two.
The utility model has the advantages that: the hydrogen circulating pump seals the gap between the shaft where the motor rotor is located and the through hole by replacing the bearing with the shaft seal, so that the bearing is of a common type, and the problems of high cost and low reliability of the bearing are solved.
Drawings
Fig. 1 is a schematic view of a hydrogen circulation pump with a shaft seal according to the present utility model.
Fig. 2 is a schematic cross-sectional view of the shaft seal.
Detailed Description
The utility model is described in further detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, the hydrogen circulation pump with shaft seal includes: the motor comprises a pump shell 1, wherein a rotor cavity 2, an impeller cavity 3 and a stator cavity 4 are arranged in the pump shell 1, the stator cavity 4 surrounds the outer side of the rotor cavity 2, a motor stator 5 is fixed in the stator cavity 4, a motor rotor 6 is rotatably arranged in the rotor cavity 2 through a bearing, a through hole 7 is formed in a partition wall between the rotor cavity 2 and the impeller cavity 3, an impeller 8 is arranged in the impeller cavity 3, one end of a shaft where the motor rotor 6 is arranged penetrates through the through hole 7 and extends into the impeller cavity 3 to be fixed with the impeller 8, the motor rotor 6 can drive the impeller 8 to rotate, a shaft seal 9 sleeved on the shaft where the motor rotor 6 is arranged in the through hole 7, and the shaft seal 9 can seal a gap between the shaft where the motor rotor 6 is arranged and the through hole 7 so as to prevent water in the impeller cavity 3 from entering the rotor cavity 2.
As shown in fig. 2, the shaft seal 9 has a structure including: the outer cylindrical wall 91, the inner cylindrical wall 92 and the middle connecting wall 93, the outer cylindrical wall 91 is sleeved on the outer side of the inner cylindrical wall 92, the inner end of the outer cylindrical wall 91 is connected with the inner end of the inner cylindrical wall 92 through the middle connecting wall 93, a sealing lip 94 used for being attached and sealed with a shaft is arranged on the inner side of the inner cylindrical wall 92, an L-shaped tensioning ring 95 and an O-shaped tensioning ring 96 are also arranged, two sides of the L-shaped tensioning ring 95 are respectively located in the outer cylindrical wall 91 and the middle connecting wall 93, the O-shaped tensioning ring 96 is fixed on the outer side of the inner cylindrical wall 92, the outer cylindrical wall 91 can be attached to the wall of the hole under the action of the L-shaped tensioning ring 95 and the O-shaped tensioning ring 96, and the sealing lip 94 on the inner cylindrical wall 92 can be attached to the shaft. The seal lip 94 on the shaft seal 9 is provided with two.
Claims (3)
1. A hydrogen circulation pump with shaft seal comprising: the motor comprises a pump shell, a rotor cavity, an impeller cavity and a stator cavity are arranged in the pump shell, the stator cavity surrounds the outer side of the rotor cavity, a motor stator is fixed in the stator cavity, a motor rotor is rotatably arranged in the rotor cavity through a bearing, a through hole is formed in a partition wall between the rotor cavity and the impeller cavity, an impeller is arranged in the impeller cavity, and one end of a shaft where the motor rotor is located penetrates through the through hole and stretches into the impeller cavity to be fixed with the impeller, so that the motor rotor can drive the impeller to rotate, and the motor rotor is characterized in that: a shaft seal sleeved on the shaft where the motor rotor is located is arranged in the through hole, and can seal a gap between the shaft where the motor rotor is located and the through hole so as to prevent water in the impeller cavity from entering the rotor cavity.
2. The hydrogen circulation pump with shaft seal according to claim 1, wherein: the shaft seal structure includes: the outer cylindrical wall, the inner cylindrical wall, well connecting wall, outer cylindrical wall suit is in the outside of inner cylindrical wall, the inner of outer cylindrical wall is connected through well connecting wall with the inner of inner cylindrical wall, be provided with on the inboard of inner cylindrical wall and be used for sealing with the laminating of axle mutually, still be provided with an L shape tensioning ring and an O shape tensioning ring, two limits of L shape tensioning ring are located outer cylindrical wall and well connecting wall respectively, O shape tensioning ring is fixed in on the outside of inner cylindrical wall, can make outer cylindrical wall and pore wall hug closely under L shape tensioning ring and O shape tensioning ring's effect, can make sealing lip on the inner cylindrical wall hug closely with the axle mutually.
3. The hydrogen circulation pump with shaft seal according to claim 2, wherein: the sealing lips on the shaft seal are provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223040025.3U CN219452487U (en) | 2022-11-16 | 2022-11-16 | Hydrogen circulating pump with shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223040025.3U CN219452487U (en) | 2022-11-16 | 2022-11-16 | Hydrogen circulating pump with shaft seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219452487U true CN219452487U (en) | 2023-08-01 |
Family
ID=87421522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223040025.3U Active CN219452487U (en) | 2022-11-16 | 2022-11-16 | Hydrogen circulating pump with shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219452487U (en) |
-
2022
- 2022-11-16 CN CN202223040025.3U patent/CN219452487U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |