CN217440320U - Cooling device of fuel cell air compressor - Google Patents
Cooling device of fuel cell air compressor Download PDFInfo
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- CN217440320U CN217440320U CN202220810311.4U CN202220810311U CN217440320U CN 217440320 U CN217440320 U CN 217440320U CN 202220810311 U CN202220810311 U CN 202220810311U CN 217440320 U CN217440320 U CN 217440320U
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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 fuel cell air compressor machine cooling device for fuel cell's two-stage air compressor machine, the two-stage air compressor machine includes low-pressure stage, high-pressure stage, motor, the motor drives respectively the low-pressure stage with the high-pressure stage, the low-pressure stage with the high-pressure stage passes through the connecting pipe intercommunication, the low-pressure stage with be equipped with the low-pressure stage backplate between the motor, be equipped with the cooling gas circuit on the motor, it has the gas fetching hole to open on the low-pressure stage backplate, the low-pressure machine with the cooling gas circuit passes through the gas fetching hole intercommunication. The utility model discloses the trompil is got gas on the runner from low pressure level, has solved the poor problem of the gas tightness of getting from the outside, has reduced the risk of gas leakage, has reduced manufacturing cost, has improved the aesthetic property of air compressor machine.
Description
Technical Field
The utility model relates to an air compressor machine cooling technology field especially relates to a fuel cell air compressor machine cooling device.
Background
The proton exchange membrane type fuel cell system is a high-efficiency clean new energy power system, an air compressor compresses air into high-pressure air, then the high-pressure air is sent to a cathode of a fuel cell, oxygen in the air and hydrogen at an anode are subjected to electrochemical reaction, generated products are electricity and water, partial heat is discharged to the atmosphere along with redundant air, and other products polluting the environment are not generated, so that the fuel cell power system is very clean and environment-friendly, and hydrogen has a plurality of manufacturing methods, belongs to clean renewable energy, and at present, all countries in the world vigorously promote the development and popularization of the hydrogen fuel cell power system.
The air compressor special for the fuel cell is a very important part in a hydrogen fuel cell power system, and is used for providing compressed air with certain pressure and certain flow for the cathode of the fuel cell so as to meet the requirement of chemical reaction of the fuel cell on oxygen in the air. Most fuel cell air compressors in the existing market are single-stage compressors and two-stage compressors, the single-stage compressor is a pinch roller driven by a motor, the two-stage compressor is two pinch rollers driven by a motor, one of the two-stage compressor is a low-pressure stage, the other one of the two-stage compressor is a high-pressure stage, the high-pressure stage and the low-pressure stage are connected in series, air enters the high-pressure stage for secondary compression after being compressed by the low-pressure stage, so that the air pressure and the flow rate of the two-stage compressor are higher than those of the single-stage compressor, and the power range of the applicable fuel cell is larger. At present, single-stage compression is mainly used for low-power fuel cell stacks, and two-stage compression is mainly used for medium-high power fuel cell stacks.
The fuel cell stack has very high requirement for the purity of the inlet air, if lubricating oil enters the fuel cell stack, the performance and the service life of a proton exchange membrane can be greatly reduced, so that the prior fuel cell air compressor mostly adopts an oil-free air bearing to meet the requirement of the fuel cell stack for inlet air and no oil. The air compressor generally has a high rotating speed which can reach 12-15 ten thousand revolutions per minute at most, and the air compressor needs to provide cooling air for cooling the air bearing when working at the high rotating speed so as to prevent high-temperature failure. In the prior art, most of the gas is taken from a connecting pipe of two-stage compression and cooled, and the outlet gas of a low-pressure stage compressor is led out from the connecting pipe and then enters the motor shell for cooling. This kind of cooling method need punch motor casing and return bend to need installation air cock and rubber tube, there is the risk of revealing, influences the aesthetic property of the whole outward appearance of air compressor machine simultaneously, and has improved the cost.
Therefore, those skilled in the art have made an effort to provide a cooling device for a fuel cell air compressor, which cools an air bearing by taking air from the inside of the air compressor, thereby improving the aesthetic property of the air compressor and reducing the cost.
SUMMERY OF THE UTILITY MODEL
There is the defect in view of prior art, the utility model aims to solve the technical problem that how to provide one kind from the inside air-compressor machine cooling device of fuel cell air compressor machine who gets the air in order to carry out the cooling to air bearing.
In order to achieve the above object, the utility model provides a fuel cell air compressor machine cooling device for fuel cell's two-stage air compressor machine, the two-stage air compressor machine includes low-pressure stage, high-pressure stage, motor, the motor drives respectively the low-pressure stage with the high-pressure stage, the low-pressure stage with the high-pressure stage passes through the connecting pipe intercommunication, its characterized in that, the low-pressure stage with be equipped with the low-pressure stage backplate between the motor, be equipped with the cooling gas circuit on the motor, it has the gas fetching hole to open on the low-pressure stage backplate, the low-pressure machine with the cooling gas circuit passes through get the gas hole intercommunication.
Further, a high-voltage-stage back plate is arranged between the high-voltage stage and the motor.
Further, still include the casing, the motor is held in the casing.
Further, the low-pressure stage and the high-pressure stage are respectively connected with the shell, the joint of the low-pressure stage and the shell is sealed with the low-pressure stage back plate, and the joint of the high-pressure stage and the shell is sealed with the high-pressure stage back plate.
Furthermore, a thrust bearing is arranged on an output shaft of the motor close to the low-pressure stage, and a radial bearing is arranged on an output shaft of the motor close to the high-pressure stage.
Further, the cooling air path comprises two branches, wherein an outlet of the first branch faces the thrust bearing, and an outlet of the second branch faces the radial bearing.
Furthermore, the shell is also provided with an exhaust hole.
Preferably, an air filter is arranged on an air inlet pipeline of the low-pressure stage.
Further, the air taking hole faces to a pressure shell flow passage of the low-pressure stage.
Further, the aperture of the air taking hole is matched with the flow of the cooling air path.
The utility model discloses following beneficial technological effect has at least:
the utility model provides a cold district device of fuel cell air compressor machine gets gas from the trompil on the runner of low pressure level, has solved the poor problem of the gas tightness of getting from the outside, has reduced the risk of gas leakage to the manufacturing cost of air compressor machine has been reduced. Meanwhile, an external air intake pipeline is reduced, and the air compressor is neater and more attractive on the whole.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a schematic structural view of a two-stage air compressor in the prior art;
FIG. 2 is a schematic flow diagram of a two-stage air compressor of the prior art;
fig. 3 is a schematic flow chart of the two-stage air compressor of the present invention;
fig. 4 is the structural schematic diagram of the two-stage air compressor of the utility model.
The device comprises a low-pressure stage, a high-pressure stage, a connecting pipe, a gas taking pipe, a motor, a shell, a low-pressure stage back plate, a high-pressure stage back plate, a cooling gas circuit, a thrust bearing, a radial bearing, a gas taking hole and a gas exhausting hole, wherein the low-pressure stage, the high-pressure stage, the connecting pipe, the gas taking pipe, the motor, the shell, the low-pressure stage back plate, the high-pressure stage, the cooling gas circuit, the thrust bearing, the radial bearing, the gas taking hole and the gas exhausting hole are 1-part, 2-part, 3-part, 4-part, 5-part, 9-part, 10-part, 11-part, 12-part and 13-part.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The utility model provides a fuel cell air compressor machine cooling device gets gas from the air compressor machine is inside to cool off the air bearing to the air compressor machine motor.
As shown in fig. 3 and 4, the cooling device for a fuel cell air compressor of the present embodiment is a two-stage air compressor for a fuel cell, the two-stage air compressor includes a low-pressure stage 1, a high-pressure stage 2, a connecting pipe 3, and a motor 5, the low-pressure stage 1 and the high-pressure stage 2 are generally located at two sides of the motor 5, the low-pressure stage 1 and the high-pressure stage 2 are respectively driven by an output shaft of the motor 5, and an outlet of the low-pressure stage 1 is connected to an inlet of the high-pressure stage 2 through the connecting pipe 3. Air enters the low-pressure stage 1 through the inlet of the low-pressure stage 1 to be compressed for the first stage, then enters the high-pressure stage 2 through the connecting pipe 3 to be compressed for the second stage, can reach higher target pressure after being compressed for two times, and is discharged through the outlet of the high-pressure stage 2.
The low-pressure stage 1 and the high-pressure stage 2 are respectively composed of a pressing wheel and a pressing shell, and an output shaft of the motor 5 is respectively connected with the pressing wheel of the low-pressure stage 1 and the pressing wheel of the high-pressure stage 2.
The motor 5 is also typically provided with a housing 6 on the outside thereof such that the motor 5 is accommodated within the housing 6. In this embodiment, the pressure shell of the low-pressure stage 1 and the pressure shell of the high-pressure stage 2 are connected to both ends of the housing 6, respectively. A low-pressure-stage back plate 7 is arranged between the pressure shell of the low-pressure-stage 1 and the shell 6, a seal is formed between the joint of the pressure shell of the low-pressure-stage 1 and the shell 6 and the low-pressure-stage back plate 7, the low-pressure-stage back plate 7 and the low-pressure-stage 1 form a closed flow channel, the low-pressure-stage back plate 7 and the shell 6 form a sealed cavity, and gas in the low-pressure-stage 1 cannot enter the shell 6 under normal conditions.
Correspondingly, a high-pressure-stage back plate 8 is arranged between the pressure shell of the high-pressure stage 2 and the shell 6, and a seal is formed between the joint of the pressure shell of the high-pressure stage 2 and the shell 6 and the high-pressure-stage back plate 8, so that a sealed cavity is ensured in the shell 6.
A thrust bearing 10 is arranged on an output shaft of the motor 5 close to one side of the low-pressure stage 1 in the shell 6 and used for ensuring the balance of axial thrust of a rotating shaft of the air compressor and the air compressor during high-speed rotation; the output shaft of the motor 5 near the high-pressure stage 2 is provided with a radial bearing 11 for providing bearing capacity and air lubrication for the rotating shaft. In some embodiments, a radial bearing 11 may also be provided on the output shaft of the motor 5 on the side near the low-voltage stage 1 for providing bearing force to the rotating shaft.
In order to cool the thrust bearing 10 and the radial bearing 11, a cooling gas path 9 is arranged on the motor 5, two branches are arranged at an outlet section of the cooling gas path 9, an outlet of the first branch faces the thrust bearing 10, the thrust bearing 10 is cooled, and meanwhile, the radial bearing 11 on the side can be cooled; the outlet of the second branch is directed toward the radial bearing 11 on the high-pressure stage 2 side, which radial bearing 11 has a cooling effect.
In order to introduce air into the cooling air path 9, an air intake hole 12 is arranged on the low-pressure stage back plate 7, and the air intake hole 12 is arranged at the position of a flow channel of the pressure shell of the low-pressure stage 1, so that the air compressed by the low-pressure stage 1 can be conveniently introduced. The other end of the air taking hole 12 is connected and communicated with the inlet of the cooling air path 9, and because the air in the pressure shell flow passage of the low-pressure stage 1 is compressed and the pressure is higher than the gas pressure in the shell 6, the air can be introduced into the cooling air path 9 through the air taking hole 12 on the low-pressure stage back plate 7.
The aperture size of the air intake hole 12 is determined according to the flow rate of the cooling air in the cooling air path 9, and the maximum cooling air flow rate can be ensured.
The casing 6 is provided with the exhaust hole 13, and the gas which absorbs the heat of the thrust bearing 10 and the radial bearing 11 is exhausted from the exhaust hole 13, so that the heat is taken away, the pressure in the casing 6 is reduced, and the gas can flow conveniently.
Still be equipped with empty straining on low pressure level 1's air inlet pipe, filter the air that gets into low pressure level 1 through empty, improve the cleanliness of air, avoid polluting the inside production of motor 5.
It should be noted that high-pressure stage backplate 8 has been set up between high-pressure stage 2's pressure shell and casing 6, but the utility model discloses in not getting gas from high-pressure stage 2 because, the pressure of gas is obviously greater than low-pressure stage 1 in high-pressure stage 2, and gas pressure is higher, and then the temperature is higher, and the temperature of gas also can be higher than low-pressure stage 1 in high-pressure stage 2. Therefore, the cooling of the gas taken from the high-pressure stage 2 reduces the cooling effect and may even deteriorate the failure because the temperature of the gas in the high-pressure stage 2 is higher than the temperature of the bearings, resulting in an increase in the temperature of the bearings.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a fuel cell air compressor machine cooling device for fuel cell's two-stage air compressor machine, the two-stage air compressor machine includes low-pressure stage, high-pressure stage, motor, the motor drives respectively the low-pressure stage with the high-pressure stage, the low-pressure stage with the high-pressure stage passes through the connecting pipe intercommunication, its characterized in that, the low-pressure stage with be equipped with the low-pressure stage backplate between the motor, be equipped with the cooling gas circuit on the motor, it gets the gas pocket to open on the low-pressure stage backplate, the low-pressure stage with the cooling gas circuit passes through get the gas pocket intercommunication.
2. The fuel cell air compressor cooling device according to claim 1, wherein a high-pressure stage back plate is further provided between the high-pressure stage and the motor.
3. The fuel cell air compressor cooling device according to claim 2, further comprising a housing, wherein the motor is accommodated in the housing.
4. The fuel cell air compressor cooling arrangement of claim 3 wherein said low pressure stage and said high pressure stage are respectively connected to said housing, wherein the connection of said low pressure stage to said housing and said low pressure stage backplate are sealed, and wherein the connection of said high pressure stage to said housing and said high pressure stage backplate are sealed.
5. The fuel cell air compressor cooling device according to claim 4, wherein the output shaft of the motor near the low pressure stage is provided with a thrust bearing, and the output shaft of the motor near the high pressure stage is provided with a radial bearing.
6. The fuel cell air compressor cooling arrangement as set forth in claim 5 wherein said cooling air path includes two branches, the outlet of the first branch being directed toward said thrust bearing and the outlet of the second branch being directed toward said radial bearing.
7. The cooling device for an air compressor of a fuel cell as claimed in claim 6, wherein the housing is further provided with a vent hole.
8. The fuel cell air compressor cooling device according to claim 1, wherein an air filter is provided in an air inlet line of the low pressure stage.
9. The fuel cell air compressor cooling device according to claim 1, wherein the air intake hole is directed toward a pressure case flow passage of the low pressure stage.
10. The cooling device for the air compressor of the fuel cell as claimed in claim 1, wherein the aperture of the air intake hole is matched with the flow rate of the cooling air path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220810311.4U CN217440320U (en) | 2022-04-09 | 2022-04-09 | Cooling device of fuel cell air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220810311.4U CN217440320U (en) | 2022-04-09 | 2022-04-09 | Cooling device of fuel cell air compressor |
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| Publication Number | Publication Date |
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| CN217440320U true CN217440320U (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220810311.4U Active CN217440320U (en) | 2022-04-09 | 2022-04-09 | Cooling device of fuel cell air compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053521A (en) * | 2023-03-31 | 2023-05-02 | 北京重理能源科技有限公司 | Fuel cell air supply system and method |
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2022
- 2022-04-09 CN CN202220810311.4U patent/CN217440320U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053521A (en) * | 2023-03-31 | 2023-05-02 | 北京重理能源科技有限公司 | Fuel cell air supply system and method |
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