CN219413266U - Air bearing structure for hydrogen fuel cell air compressor - Google Patents
Air bearing structure for hydrogen fuel cell air compressor Download PDFInfo
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- CN219413266U CN219413266U CN202320343968.9U CN202320343968U CN219413266U CN 219413266 U CN219413266 U CN 219413266U CN 202320343968 U CN202320343968 U CN 202320343968U CN 219413266 U CN219413266 U CN 219413266U
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- sleeve body
- bearing
- side wall
- inner sleeve
- air
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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
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model discloses an air bearing structure for a hydrogen fuel cell air compressor, which comprises a bearing outer sleeve body, wherein a bearing inner sleeve body is inserted in the bearing outer sleeve body, the bearing inner sleeve body is fixed in the bearing outer sleeve body, an annular cavity is formed between the bearing outer sleeve body and the bearing inner sleeve body, a plurality of reducing through holes are formed on the outer wall surface of the bearing inner sleeve body, and the inner ends of the reducing through holes extend out of the inner side wall of the bearing inner sleeve body; the inner side wall of the bearing inner sleeve body is provided with a plurality of axially extending strip-shaped air cavities, and all the strip-shaped air cavities are uniformly distributed on the inner side wall of the bearing inner sleeve body by taking the central axis of the bearing inner sleeve body as the center; the long-strip-shaped air cavity is formed on the inner side wall of the bearing inner sleeve body, and gas from the reducing through hole on the long-strip-shaped air cavity can be concentrated in the long-strip-shaped air cavity and then sprayed onto the rotating shaft inserted into the bearing inner sleeve body, so that the spraying uniformity is improved, and friction generated by touch between the rotating shaft and the inner side wall of the bearing inner sleeve body when the bearing inner sleeve body is just started is reduced.
Description
Technical field:
the utility model relates to the technical field of air bearing, in particular to an air bearing structure for a hydrogen fuel cell air compressor.
The background technology is as follows:
with the hydrogen fuel cell technology gradually reaching the brand-new angle in the market and starting commercial application, the hydrogen fuel cell air compressor also gradually enters the public view, the rotating speed of the hydrogen fuel cell air compressor needs to be improved in order to improve the efficiency of the hydrogen fuel cell air compressor, and the requirement on a bearing is relatively improved while the rotating speed is improved, the existing air bearing is also an air bearing, and the requirement can be just met, and because the air bearing is a sliding bearing adopting gas as a lubricant, the friction and abrasion of the air bearing are quite small, and the air bearing completely meets the use requirement of high rotating speed;
however, in the existing air bearing, for example, an air bearing, a rotor system and a micro gas turbine with the application number 201911353113.9 of chinese patent, the air bearing is directly sprayed onto the rotating shaft where the air bearing is only inserted, and since the air outlet amounts of all the orifices are different at the beginning, the rotating shaft cannot be in the middle when the air outlet amounts are directly sprayed onto the rotating shaft, so that the air bearing is easy to touch or rub with the inner side wall of the air bearing, and the service life is reduced.
The utility model comprises the following steps:
the utility model aims to overcome the defects of the prior art and provides an air bearing structure for a hydrogen fuel cell air compressor, which is provided with a strip-shaped air cavity formed on the inner side wall of an inner bearing sleeve body, and can concentrate gas discharged from a variable-diameter through hole on the strip-shaped air cavity and then spray the gas onto a rotating shaft inserted into the inner bearing sleeve body, thereby improving the spraying uniformity, reducing friction generated by touch between the rotating shaft and the inner side wall of the inner bearing sleeve body when the air bearing is just started, and ensuring the service life.
The scheme for solving the technical problems is as follows:
the air bearing structure for the hydrogen fuel cell air compressor comprises a bearing outer sleeve body, wherein a bearing inner sleeve body is inserted in the bearing outer sleeve body, the bearing inner sleeve body is fixed in the bearing outer sleeve body, an annular cavity is formed between the bearing outer sleeve body and the bearing inner sleeve body, a plurality of reducing through holes are formed in the outer wall surface of the bearing inner sleeve body, and the inner ends of the reducing through holes extend out of the inner side wall of the bearing inner sleeve body;
the inner side wall of the bearing inner sleeve body is provided with a plurality of axially extending strip-shaped air cavities, and all the strip-shaped air cavities are uniformly distributed on the inner side wall of the bearing inner sleeve body by taking the central axis of the bearing inner sleeve body as the center;
the inner ends of all the corresponding reducing through holes of the bearing inner sleeve body are communicated with the corresponding strip-shaped air cavities.
The bearing inner sleeve body comprises a main sleeve body;
the wear-resistant sleeve is characterized in that a wear-resistant sleeve body part is arranged on the inner side wall of the main sleeve body, a strip-shaped air cavity is formed in the inner side wall of the wear-resistant sleeve body part, a plurality of through holes are formed in the inner wall surface of the strip-shaped air cavity, a plurality of reducing through holes are formed in the outer side wall of the main sleeve body, and the inner ends of the corresponding reducing through holes are communicated with and aligned with the corresponding through holes.
The inner diameter of the outer end of the reducing through hole is larger than that of the inner end.
An annular cavity is formed in the middle of the inner side wall of the bearing outer sleeve body.
An inner radial extension edge is formed on the inner side wall of the left end of the bearing outer sleeve body, the left end face of the bearing inner sleeve body is pressed against the right end face of the inner radial extension edge and is fixedly connected with the inner radial extension edge through bolts, and the right end faces of the bearing outer sleeve body and the bearing inner sleeve body are tightly attached to a right end ring-shaped plate at the right side of the bearing outer sleeve body and are fixedly connected with the right end ring-shaped plate through bolts.
A first sealing ring is clamped between the right end face of the inner radial extension edge and the left end face of the bearing inner sleeve body, and a second sealing ring is clamped between the outer side wall of the right end of the bearing inner sleeve body and the inner side wall of the right end of the bearing outer sleeve body.
The utility model has the outstanding effects that:
1. the strip-shaped air cavity is formed on the inner side wall of the bearing inner sleeve body, and gas from the variable-diameter through hole on the strip-shaped air cavity can be concentrated in the strip-shaped air cavity and then sprayed onto the rotating shaft inserted into the bearing inner sleeve body, so that the spraying uniformity is improved, friction generated by touch between the rotating shaft and the inner side wall of the bearing inner sleeve body when the bearing inner sleeve body is just started is reduced, and the service life is ensured.
2. The bearing inner sleeve body comprises a main sleeve body, and the inner side wall of the main sleeve body is provided with a wear-resistant sleeve body part, so that the wear resistance of the bearing inner sleeve body is improved, and the service life of the bearing inner sleeve body is prolonged.
Description of the drawings:
FIG. 1 is a schematic view of a partial structure of the present utility model;
fig. 2 is a partial cross-sectional view of the present utility model.
The specific embodiment is as follows:
1-2, an air bearing structure for a hydrogen fuel cell air compressor comprises a bearing outer sleeve body 10, wherein an annular cavity 11 is formed in the middle of the inner side wall of the bearing outer sleeve body 10, a bearing inner sleeve body 20 is inserted into the bearing outer sleeve body 10, the outer side wall of the bearing inner sleeve body 20 is tightly attached to the inner side wall of the bearing outer sleeve body 10, and the bearing inner sleeve body 20 comprises a main sleeve body 23; the inner side wall of the main sleeve body 23 is fixed or compounded with a wear-resistant sleeve body 24, the inner side wall of the wear-resistant sleeve body 24 is formed with a plurality of strip-shaped air cavities 22, and all the strip-shaped air cavities 22 are uniformly distributed on the inner side wall of the wear-resistant sleeve body 24 by taking the central axis of the wear-resistant sleeve body 24 as the center;
the inner wall surface of the strip-shaped air cavity 22 is provided with a plurality of through holes 221, the outer side wall of the main sleeve body 23 is provided with a plurality of reducing through holes 21, the inner ends of the corresponding reducing through holes 21 are communicated with and aligned with the corresponding through holes 221, and the outer ends of the reducing through holes 21 extend out of the outer side wall of the main sleeve body 23 and are communicated with the annular cavity 11.
Further, the diameter-variable through hole 21 has an outer end with an inner diameter larger than that of the inner end.
Further, an inner radial extension edge 12 is formed on the inner sidewall of the left end of the bearing outer sleeve 10, the left end face of the bearing inner sleeve 20 is pressed against the right end face of the inner radial extension edge 12 and fixedly connected to the inner radial extension edge 12 through bolts, and the right end faces of the bearing outer sleeve 10 and the bearing inner sleeve 20 are tightly attached to the right end ring plate 30 on the right side of the bearing outer sleeve and fixedly connected to the right end ring plate 30 through bolts.
Further, a first sealing ring 1 is clamped between the right end face of the inner radial extension edge 12 and the left end face of the inner bearing sleeve body 20, and a second sealing ring 2 is clamped between the right end outer side wall of the inner bearing sleeve body 20 and the right end inner side wall of the outer bearing sleeve body 10.
Further, a plurality of air inlet screw through holes 13 are formed on the outer side wall of the middle part of the bearing outer sleeve body 10, all the air inlet screw through holes 13 are uniformly distributed on the bearing outer sleeve body 10 by taking the central axis of the bearing outer sleeve body 10 as the center, and the inner ends of the air inlet screw through holes 13 are communicated with the annular cavity 11;
the middle part of the outer side wall of the main sleeve body 23 is formed with an annular protruding ring part 231 extending radially outwards, the left and right end surfaces of the annular protruding ring part 231 are inclined wall surfaces, the outer side parts of the left and right end surfaces of the annular protruding ring part 231 are close to the inner side parts and are far away, and the inner end of the air inlet screw through hole 13 faces the annular protruding ring part 231.
Further, a radially extending connection flange portion 14 is formed on an outer side wall of one end of the bearing housing 10, and a plurality of connection through holes 15 are formed on the connection flange portion 14.
When the anti-abrasion wear sleeve is used, the air inlet screw through hole 13 is screwed with the connector, air can be introduced into the annular cavity 11 through the connector, when the air enters the annular cavity 11, the air is blown by the annular convex ring part 231 at the left side and the right side, then the air enters the corresponding strip-shaped air cavity 22 through the corresponding reducing through hole 21, so that the air is converged in the strip-shaped air cavity 22, then blown onto the outer side wall of the rotating shaft of the insert sleeve in the wear sleeve body 24, the rotating shaft is moved to the center, and then the rotating operation can be performed.
The wear-resistant sleeve body 24 of this embodiment is made of a wear-resistant material, such as a bearing alloy. Which reduces wear when the shaft is not in operation, and which contacts the wear sleeve body 24.
In operation, the annular raised ring 231 blows gas to the left and right sides, so that the uniformity of gas distribution is improved, and then, when the gas enters the corresponding long-strip-shaped air cavity 22 from the corresponding reducing through hole 21, the uniformity of gas flow is further improved, and then, the gas is blown onto the rotating shaft, so that friction generated by contact between the rotating shaft and the inner side wall of the wear-resistant sleeve body 24 when the gas is just started is reduced, and the service life is ensured.
Claims (6)
1. The utility model provides a hydrogen fuel cell air compressor machine air supporting bearing structure, includes bearing overcoat body (10), its characterized in that: the bearing outer sleeve body (10) is internally inserted with a bearing inner sleeve body (20), the bearing inner sleeve body (20) is fixed in the bearing outer sleeve body (10), an annular cavity (11) is formed between the bearing outer sleeve body (10) and the bearing inner sleeve body (20), a plurality of reducing through holes (21) are formed in the outer wall surface of the bearing inner sleeve body (20), and the inner ends of the reducing through holes (21) extend out of the inner side wall of the bearing inner sleeve body (20);
a plurality of axially extending strip-shaped air cavities (22) are formed on the inner side wall of the bearing inner sleeve body (20), and all the strip-shaped air cavities (22) are uniformly distributed on the inner side wall of the bearing inner sleeve body (20) by taking the central axis of the bearing inner sleeve body (20) as the center;
the inner ends of all the corresponding reducing through holes (21) of the bearing inner sleeve body (20) are communicated with the corresponding strip-shaped air cavity (22).
2. The air bearing structure for a hydrogen fuel cell air compressor as defined in claim 1, wherein: the bearing inner sleeve body (20) comprises a main sleeve body (23);
the wear-resistant air cavity is characterized in that a wear-resistant sleeve body part (24) is arranged on the inner side wall of the main sleeve body (23), a strip-shaped air cavity (22) is formed on the inner side wall of the wear-resistant sleeve body part (24), a plurality of through holes (221) are formed on the inner wall surface of the strip-shaped air cavity (22), a plurality of reducing through holes (21) are formed on the outer side wall of the main sleeve body (23), and the inner ends of the corresponding reducing through holes (21) are communicated with and aligned with the corresponding through holes (221).
3. The air bearing structure for a hydrogen fuel cell air compressor according to claim 2, wherein: the inner diameter of the outer end of the reducing through hole (21) is larger than that of the inner end.
4. The air bearing structure for a hydrogen fuel cell air compressor as defined in claim 1, wherein: an annular cavity (11) is formed in the middle of the inner side wall of the bearing outer sleeve body (10).
5. The air bearing structure for a hydrogen fuel cell air compressor as defined in claim 1, wherein: an inner radial extension edge (12) is formed on the inner side wall of the left end of the bearing outer sleeve body (10), the left end face of the bearing inner sleeve body (20) is pressed against the right end face of the inner radial extension edge (12) and fixedly connected to the inner radial extension edge (12) through bolts, and the right end faces of the bearing outer sleeve body (10) and the bearing inner sleeve body (20) are tightly attached to a right end annular plate (30) on the right side of the bearing outer sleeve body and fixedly connected to the right end annular plate (30) through bolts.
6. The air bearing structure for a hydrogen fuel cell air compressor as defined in claim 5, wherein: a first sealing ring (1) is clamped between the right end face of the inner radial extension edge (12) and the left end face of the bearing inner sleeve body (20), and a second sealing ring (2) is clamped between the outer side wall of the right end of the bearing inner sleeve body (20) and the inner side wall of the right end of the bearing outer sleeve body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320343968.9U CN219413266U (en) | 2023-03-01 | 2023-03-01 | Air bearing structure for hydrogen fuel cell air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320343968.9U CN219413266U (en) | 2023-03-01 | 2023-03-01 | Air bearing structure for hydrogen fuel cell air compressor |
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| CN219413266U true CN219413266U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320343968.9U Active CN219413266U (en) | 2023-03-01 | 2023-03-01 | Air bearing structure for hydrogen fuel cell air compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116667595A (en) * | 2023-08-01 | 2023-08-29 | 浙江晶鸿精密机械制造有限公司 | Motorized spindle and automatic regulating system |
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2023
- 2023-03-01 CN CN202320343968.9U patent/CN219413266U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116667595A (en) * | 2023-08-01 | 2023-08-29 | 浙江晶鸿精密机械制造有限公司 | Motorized spindle and automatic regulating system |
| CN116667595B (en) * | 2023-08-01 | 2023-11-21 | 浙江晶鸿精密机械制造有限公司 | Motorized spindle and automatic regulating system |
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