CN220227532U - Radial shaft sleeve structure of high-speed centrifugal air compressor - Google Patents
Radial shaft sleeve structure of high-speed centrifugal air compressor Download PDFInfo
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- CN220227532U CN220227532U CN202321976514.1U CN202321976514U CN220227532U CN 220227532 U CN220227532 U CN 220227532U CN 202321976514 U CN202321976514 U CN 202321976514U CN 220227532 U CN220227532 U CN 220227532U
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- radial
- shaft sleeve
- cooling
- air bearing
- support shaft
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- 238000001816 cooling Methods 0.000 claims abstract description 36
- 230000008093 supporting effect Effects 0.000 claims abstract description 23
- 239000000498 cooling water Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of high-speed centrifugal air compressors, in particular to a radial shaft sleeve structure of a high-speed centrifugal air compressor. A first radial air bearing and a second radial air bearing are arranged between the radial support shaft sleeve and the main shaft, and a plurality of first exhaust holes and second exhaust holes are respectively arranged in the side wall of the radial support shaft sleeve along the circumference at positions corresponding to the end parts of the first radial air bearing and the second radial air bearing; a plurality of third exhaust holes are formed in the side wall of the radial cooling shaft sleeve along the circumference at positions corresponding to the first exhaust holes, and a cooling water tank is arranged between the outer circumference of the radial cooling shaft sleeve and the motor shell. The radial support shaft sleeve is used for supporting the main shaft and the two radial air bearings, so that the structure is simple, and the assembly cost is low; the radial cooling shaft sleeve is cooled by circulating water in the cooling water tank, so that the cooling effect is good, and the service life of the radial air bearing can be prolonged; the first exhaust hole and the second exhaust hole are beneficial to the formation of an air film, and the radial supporting effect of the radial air bearing can be improved.
Description
Technical field:
the utility model relates to the technical field of high-speed centrifugal air compressors, in particular to a radial shaft sleeve structure of a high-speed centrifugal air compressor.
The background technology is as follows:
the high-speed centrifugal air compressor is mainly used for pressurizing air in an air supply system of a fuel cell engine, and has a structure like the patent application with the publication number of CN105736424A, and the single-stage direct-drive pressurizing centrifugal air compressor of the fuel cell engine for vehicles directly drives an impeller to rotate through a motor so as to realize the pressurizing of the air, and when a main shaft of the motor rotates at a high speed, two ends of the main shaft are respectively supported through radial air bearings, and each radial air bearing is required to be installed through a separate bearing seat; secondly, the radial air bearing has poor cooling effect, and is easy to damage due to overhigh temperature rise during long-time working; and thirdly, the air flow of the radial air bearing is insufficient, so that the radial supporting effect of the radial air bearing is affected.
In summary, the above-mentioned problems of radial air bearings in high-speed centrifugal air compressors have become a technical problem to be solved in industry.
The utility model comprises the following steps:
the utility model provides a radial shaft sleeve structure of a high-speed centrifugal air compressor to make up for the defects of the prior art, solves the problem that the conventional radial air bearing is complex in installation structure by a separate bearing seat, and solves the problems of poor cooling effect and insufficient air flow of the conventional radial air bearing.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the radial shaft sleeve structure of the high-speed centrifugal air compressor comprises a radial supporting shaft sleeve and a radial cooling shaft sleeve, wherein the radial supporting shaft sleeve is sleeved on the outer side of a main shaft, a first radial air bearing and a second radial air bearing are arranged between the radial supporting shaft sleeve and the main shaft, and a plurality of first exhaust holes and second exhaust holes are respectively formed in the side wall of the radial supporting shaft sleeve at positions corresponding to the end parts of the first radial air bearing and the second radial air bearing along the circumference; the radial cooling shaft sleeve is sleeved on the outer side of the radial support shaft sleeve, a plurality of third exhaust holes are formed in the side wall of the radial cooling shaft sleeve along the circumference at positions corresponding to the first exhaust holes, a cooling water tank is arranged between the outer circumference of the radial cooling shaft sleeve and the motor shell, and sealing ring grooves are formed in two sides of the cooling water tank.
And a gas buffer cavity is arranged between the inner side of the radial cooling shaft sleeve and the outer side of the radial supporting shaft sleeve, and the gas buffer cavity is respectively communicated with the first exhaust hole and the third exhaust hole.
The middle part of the outer side of the radial support shaft sleeve is provided with a connecting boss, and the radial support shaft sleeve and the radial cooling shaft sleeve are connected through interference press fit of the connecting boss.
One end of the radial support shaft sleeve, which is close to the motor, is arranged into a cone shape.
And a sealing ring is arranged in the sealing ring groove and used for sealing the cooling water tank.
The utility model adopts the scheme and has the following advantages:
the radial support shaft sleeve is used for supporting the main shaft and the two radial air bearings, so that the structure is simple, and the assembly cost is low; the radial cooling shaft sleeve is arranged on the outer side of the radial supporting shaft sleeve, a cooling water tank is arranged between the outer circumference of the radial cooling shaft sleeve and the motor shell, and the radial cooling shaft sleeve is cooled by circulating water, so that the radial supporting shaft sleeve and the two radial air bearings are cooled, the cooling effect is good, and the service life of the radial air bearings can be prolonged; the first exhaust hole and the second exhaust hole are formed in the side wall of the radial supporting shaft sleeve, and the third exhaust hole is formed in the side wall of the radial cooling shaft sleeve, so that the air flow of the radial air bearing can be increased, the formation of an air film is facilitated, the radial supporting effect of the radial air bearing can be improved, the internal air circulation can be accelerated, and the internal air cooling effect is improved.
Description of the drawings:
fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic cross-sectional view of the present utility model.
Fig. 3 is a schematic perspective view of a radial support sleeve according to the present utility model.
Fig. 4 is a schematic perspective view of a radial cooling jacket according to the present utility model.
In the figure, 1, radial support shaft sleeve, 2, radial cooling shaft sleeve, 3, main shaft, 4, first radial air bearing, 5, first exhaust hole, 6, second exhaust hole, 7, third exhaust hole, 8, cooling water tank, 9, sealing ring groove, 10, gas buffer cavity, 11, connection boss, 12, second radial air bearing.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-4, a radial shaft sleeve structure of a high-speed centrifugal air compressor comprises a radial supporting shaft sleeve 1 and a radial cooling shaft sleeve 2, wherein the radial supporting shaft sleeve 1 is sleeved on the outer side of a main shaft 3, a first radial air bearing 4 and a second radial air bearing 12 are arranged between the radial supporting shaft sleeve 1 and the main shaft 3, and a plurality of first exhaust holes 5 and second exhaust holes 6 are respectively arranged in the side wall of the radial supporting shaft sleeve 1 along the circumference at positions corresponding to the end parts of the first radial air bearing 4 and the second radial air bearing 12; the radial cooling shaft sleeve 2 is sleeved outside the radial supporting shaft sleeve 1, a plurality of third exhaust holes 7 are formed in the side wall of the radial cooling shaft sleeve 2 along the circumference at positions corresponding to the first exhaust holes 5, a cooling water tank 8 is arranged between the outer circumference of the radial cooling shaft sleeve 2 and the motor shell, sealing ring grooves 9 are formed in two sides of the cooling water tank 8, and sealing rings are installed in the sealing ring grooves 9 and used for sealing the cooling water tank 8.
A gas buffer cavity 10 is arranged between the inner side of the radial cooling shaft sleeve 2 and the outer side of the radial supporting shaft sleeve 1, and the gas buffer cavity 10 is respectively communicated with the first exhaust hole 5 and the third exhaust hole 6. After the air in the compression cavity enters the first radial air bearing 4, one part of the air enters the second radial air bearing 12 through a gap between the main shaft 3 and the radial support shaft sleeve 1, the other part of the air enters the air buffer cavity 10 through the first exhaust hole 5 and is exhausted outwards through the third exhaust hole 7, and as the first radial air bearing 4 is closer to the worm wheel, the received radial force is larger and the radial support effect requirement is higher, the air buffer cavity 10 is arranged, and the air buffer cavity 10 can ensure the stability of the air pressure at the first radial air bearing 4 to a certain extent, so that the stability of an air film is ensured, and the radial support effect of the first radial air bearing 4 can be improved.
The middle part of the outer side of the radial support shaft sleeve 1 is provided with a connecting boss 11, and the radial support shaft sleeve 1 and the radial cooling shaft sleeve 2 are connected through interference press fit of the connecting boss 11.
One end of the radial support shaft sleeve 1, which is close to the motor, is arranged into a cone shape and is used for installation and positioning.
Working principle:
during installation, the radial support shaft sleeve 1 is sleeved on the outer side of the main shaft 3 between the motor and the worm wheel, the first radial air bearing 4 and the second radial air bearing 12 are supported, the structure is simple, the assembly cost is low, and the radial cooling shaft sleeve 2 is sleeved on the outer side of the radial support shaft sleeve 1. During cooling, circulating water can be introduced into the cooling water tank 8, the radial cooling shaft sleeve 2 is cooled through the circulating water, and then the radial supporting shaft sleeve 1, the first radial air bearing 4 and the second radial air bearing 12 are cooled, so that the cooling effect is good, and the service lives of the first radial air bearing 4 and the second radial air bearing 12 can be prolonged. During operation, air in the compression cavity enters the gap between the main shaft 3 and the radial supporting shaft sleeve 1, air required for operation is provided for the first radial air bearing 4 and the second radial air bearing 12, the first exhaust hole 5 and the second exhaust hole 6 can play a role in increasing air flow, the formation of an air film is facilitated, the radial supporting effect can be improved, the internal air circulation can be accelerated, and the internal air cooling effect is improved.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (5)
1. The utility model provides a radial axle sleeve structure of high-speed centrifugal air compressor machine which characterized in that: the radial support shaft sleeve is sleeved on the outer side of the main shaft, a first radial air bearing and a second radial air bearing are arranged between the radial support shaft sleeve and the main shaft, and a plurality of first exhaust holes and second exhaust holes are respectively formed in the side wall of the radial support shaft sleeve at positions corresponding to the end parts of the first radial air bearing and the second radial air bearing along the circumference; the radial cooling shaft sleeve is sleeved on the outer side of the radial support shaft sleeve, a plurality of third exhaust holes are formed in the side wall of the radial cooling shaft sleeve along the circumference at positions corresponding to the first exhaust holes, a cooling water tank is arranged between the outer circumference of the radial cooling shaft sleeve and the motor shell, and sealing ring grooves are formed in two sides of the cooling water tank.
2. The radial bushing structure of a high-speed centrifugal air compressor according to claim 1, wherein: and a gas buffer cavity is arranged between the inner side of the radial cooling shaft sleeve and the outer side of the radial supporting shaft sleeve, and the gas buffer cavity is respectively communicated with the first exhaust hole and the third exhaust hole.
3. The radial bushing structure of a high-speed centrifugal air compressor according to claim 1, wherein: the middle part of the outer side of the radial support shaft sleeve is provided with a connecting boss, and the radial support shaft sleeve and the radial cooling shaft sleeve are connected through interference press fit of the connecting boss.
4. The radial bushing structure of a high-speed centrifugal air compressor according to claim 1, wherein: one end of the radial support shaft sleeve, which is close to the motor, is arranged into a cone shape.
5. The radial bushing structure of a high-speed centrifugal air compressor according to claim 1, wherein: and a sealing ring is arranged in the sealing ring groove and used for sealing the cooling water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321976514.1U CN220227532U (en) | 2023-07-26 | 2023-07-26 | Radial shaft sleeve structure of high-speed centrifugal air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321976514.1U CN220227532U (en) | 2023-07-26 | 2023-07-26 | Radial shaft sleeve structure of high-speed centrifugal air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227532U true CN220227532U (en) | 2023-12-22 |
Family
ID=89196080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321976514.1U Active CN220227532U (en) | 2023-07-26 | 2023-07-26 | Radial shaft sleeve structure of high-speed centrifugal air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227532U (en) |
-
2023
- 2023-07-26 CN CN202321976514.1U patent/CN220227532U/en active Active
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