CN110594170B - Centrifugal compressor and hydrogen fuel cell system - Google Patents
Centrifugal compressor and hydrogen fuel cell system Download PDFInfo
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- CN110594170B CN110594170B CN201910816298.6A CN201910816298A CN110594170B CN 110594170 B CN110594170 B CN 110594170B CN 201910816298 A CN201910816298 A CN 201910816298A CN 110594170 B CN110594170 B CN 110594170B
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- 239000000446 fuel Substances 0.000 title claims abstract description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000001257 hydrogen Substances 0.000 title claims abstract description 20
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 20
- 239000002826 coolant Substances 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 230000002411 adverse Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal compressor and a hydrogen fuel cell system, wherein the centrifugal compressor comprises a shell which is provided with a first cooling medium flow passage; the rotating shaft penetrates through the shell; the impeller is connected with one end of the rotating shaft; the motor assembly comprises a rotor and a stator, the rotor is connected with the rotating shaft, and the stator is arranged on the outer side of the rotor and connected with the shell; the first volute is connected with the shell and covers the outer side of the impeller, and a first air inlet and a first air outlet are formed in the first volute; the turbine is connected with the other end of the rotating shaft; the second volute is connected with the machine shell and covers the outer side of the turbine, and a second air inlet and a second air outlet are formed in the second volute; and the heat exchanger is internally provided with a second cooling medium flow channel which is communicated with the first cooling medium flow channel, the heat exchanger is provided with a through air flow channel, and the air flow channel is communicated with the second air outlet. A hydrogen fuel cell system includes a stack and a centrifugal compressor. The technical scheme has higher energy utilization rate and prolonged service life.
Description
Technical Field
The invention is used in the field of hydrogen fuel cells, and particularly relates to a centrifugal compressor and a hydrogen fuel cell system.
Background
Hydrogen fuel cells must operate at relatively high gas pressures to achieve high power densities and performance, and therefore require high efficiency, high compression ratio air compressors to provide high pressure air to the fuel cells. The compressors adopted by the prior hydrogen fuel cell mainly comprise a Roots type compressor, a scroll type compressor, a screw type compressor and a centrifugal type compressor. Among them, the centrifugal compressor has a compact structure, a small size, a light weight, and a significant reduction in vibration and noise, and represents a future development direction of the hydrogen fuel cell compressor.
The high-pressure gas compressed by the centrifugal compressor is continuously discharged out of the stack body while providing the power generation environmental condition through the stack of the hydrogen fuel cell. These gases, which are exhausted from the stack, still have high temperatures and pressures, which are not fully utilized by the prior art.
Disclosure of Invention
The present invention has been made to solve at least one of the problems of the prior art, and an object of the present invention is to provide a centrifugal compressor and a hydrogen fuel cell system, which can recycle gas discharged from the centrifugal compressor in multiple stages, and which can achieve a higher energy utilization ratio, and which can reduce the operating temperature of the centrifugal compressor and prolong the service life.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect, a centrifugal compressor comprises
A casing provided with a first cooling medium flow passage;
the rotating shaft penetrates through the shell;
the impeller is connected with one end of the rotating shaft;
the motor assembly comprises a rotor and a stator, the rotor is connected with the rotating shaft, and the stator is arranged on the outer side of the rotor and connected with the shell;
the first volute is connected with the shell and covers the outer side of the impeller, and a first air inlet and a first air outlet are formed in the first volute;
the turbine is connected with the other end of the rotating shaft;
the second volute is connected with the machine shell and covers the outer side of the turbine, and a second air inlet and a second air outlet are formed in the second volute; and
and a second cooling medium flow channel is arranged in the heat exchanger and is communicated with the first cooling medium flow channel, the heat exchanger is provided with a through air flow channel, and the air flow channel is communicated with the second air outlet.
With reference to the first aspect, in certain implementations of the first aspect, the heat exchanger includes
The first component is internally provided with the through air flow channel;
and a second member provided outside the first member and hermetically connected to the first member, wherein the second cooling medium channel is provided between the first member and the second member.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the first component and the second component are both cylindrical, the outer wall surface of the first component is provided with a first groove along the circumferential direction, the second component is sleeved on the outer side of the first component and seals the first groove, and the second component is provided with a first cooling medium inlet and a first cooling medium outlet which are communicated with the first groove.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the first component is provided with a first guide rib in the first groove.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the hollow inner hole of the first component forms the airflow channel, a plurality of blades are arranged on a hole wall of the inner hole, each blade extends along a length direction of the inner hole, the plurality of blades are uniformly distributed along a circumferential direction of the inner hole, a gap is reserved between adjacent blades, a through region with a circular cross section is defined by end portions of the plurality of blades in the airflow channel, and a sawtooth is arranged on a surface of each blade.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the second volute is connected with an end portion of the heat exchanger, and the second air outlet is flared and is in butt joint with the air flow channel.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, an end portion of the heat exchanger is provided with a caulking groove, an end portion of the second volute is embedded in the caulking groove, and a periphery of an end portion of the second volute is provided with a flange, and the flange is connected with the heat exchanger through a fastening member.
With reference to the first aspect and the implementations described above, in certain implementations of the first aspect, the housing includes
The outer wall surface of the inner shell is provided with a second groove along the circumferential direction;
the outer shell is sleeved on the outer side of the inner shell and seals the second groove, a second cooling medium inlet and a second cooling medium outlet which are communicated with the second groove are formed in the outer shell, and the first cooling medium outlet is communicated with the second cooling medium inlet through a pipeline.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the stator is attached to an inner surface of the inner housing, and the inner housing is provided with a second guide rib in the second groove.
In a second aspect, a hydrogen fuel cell system includes
The electric pile is provided with a third air inlet and a third air outlet;
in the centrifugal compressor of any one of the first aspect, the first air outlet port communicates with the third air inlet port, and the third air outlet port communicates with the second air inlet port.
One of the above technical solutions has at least one of the following advantages or beneficial effects: the high-pressure gas compressed by the centrifugal compressor enters the second volute after flowing through a load (such as a stack of a hydrogen fuel cell), and the high-pressure gas pushes a turbine on the same shaft system with the impeller to rotate, so that the requirements on the output torque and power of the motor are reduced, the energy-saving effect is achieved for the whole system, the temperature and the pressure of the gas entering from the second gas inlet are high, this gas is rapidly expanded and discharged to the surrounding atmosphere while propelling the turbine to rotate, its pressure drops rapidly, and its temperature reduces by a wide margin, then gets into the heat exchanger, and the cooling medium of cold air through heat exchanger cooling motor improves motor stator cooling medium's temperature, and the motor can obtain more effective cooling, and the heat that the motor produced is taken away more easily, has reduced the temperature of motor during operation, has improved the insulation life of motor to the life of motor has been prolonged.
This technical scheme can carry out multistage recycle to centrifugal compressor exhaust gas, and the utilization ratio of energy is higher, simultaneously, also can reduce centrifugal compressor's operating temperature, increase of service life.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural view of one embodiment of a centrifugal compressor of the present invention;
FIG. 2 is a cross-sectional view of one embodiment A-A shown in FIG. 1;
fig. 3 is a schematic structural view of one embodiment of a hydrogen fuel cell system of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the present invention, if directions (up, down, left, right, front, and rear) are described, it is only for convenience of describing the technical solution of the present invention, and it is not intended or implied that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, it is not to be construed as limiting the present invention.
In the present invention, "a plurality" means one or more, "a plurality" means two or more, "more than", "less than", "more than", and the like are understood as not including the number; the terms "above", "below", "within" and the like are to be understood as including the number. In the description of the present invention, if there are descriptions of "first", "second", and "third" for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.
Referring to fig. 1, an embodiment of the present invention provides a centrifugal compressor, including a casing 1, a rotating shaft 2, an impeller 3, a motor assembly, a first volute 4, a turbine 5, a second volute 6, and a heat exchanger 7, wherein the casing 1, the rotating shaft 2, the impeller 3, the motor assembly, and the first volute 4 constitute an air compression mechanism, and the motor assembly drives the impeller 3 to rotate in the first volute 4 through the rotating shaft 2, so as to continuously compress air and deliver the compressed air to a load. In order to obtain high compression ratio and high pneumatic system efficiency, the rotation speed of the air compression mechanism is often high, for example, in the field of hydrogen fuel cells, the rotation speed of a centrifugal compressor is usually up to 80000rpm to 150000rpm, and even up to 500000 rpm. The turbine 5 and the second volute 6 form a turbine 5 mechanism for recycling gas flowing through the load equipment to realize first-stage recycling, and the heat exchanger 7 is connected to the downstream of the turbine 5 mechanism for recycling gas flowing through the turbine 5 mechanism to realize second-stage recycling.
Specifically, referring to fig. 1, a first cooling medium flow channel 8 is arranged in a casing 1, the first cooling medium flow channel 8 flows a cooling medium, the cooling medium may be cooling liquid, cooling gas, or the like, and is used for cooling and dissipating heat of internal components, and the internal components mainly include a motor component and a rotating shaft 2. The rotating shaft 2 penetrates through the machine shell 1, the motor assembly comprises a rotor and a stator 10, the rotor is connected with the rotating shaft 2, and the stator 10 is arranged on the outer side of the rotor and connected with the machine shell 1. The motor assembly can drive the rotating shaft 2 to rotate. The impeller 3 is connected with one end of the rotating shaft 2, the first volute 4 is connected with the casing 1 and covers the outer side of the impeller 3, the first volute 4 is provided with a first air inlet 11 and a first air outlet 12, when the impeller 3 rotates, air is sucked in through the first air inlet 11, high-temperature and high-pressure gas is formed after the air is compressed by the impeller 3 and is exhausted through the first air outlet 12, and the high-temperature and high-pressure gas is connected into load equipment to provide a relatively high-gas-pressure working environment for the load equipment, such as a galvanic pile of a hydrogen fuel cell.
Referring to fig. 1, the turbine 5 is connected to the other end of the rotating shaft 2, that is, the turbine 5 and the impeller 3 are respectively installed at two ends of the rotating shaft 2, the second volute 6 is connected to the casing 1 and covers the outside of the turbine 5, the second volute 6 is provided with a second air inlet 13 and a second air outlet 14, the turbine 5 and the second volute 6 form a turbine 5 mechanism, which is used for recycling gas flowing through a load device, that is, high-pressure gas compressed by a centrifugal compressor flows through a load (for example, a stack of a hydrogen fuel cell) and then enters the second volute 6, and the high-pressure gas pushes the turbine 5 on the same shaft system as the impeller 3 to rotate, so that requirements on output torque and power of a motor are reduced, and an energy-saving effect is achieved for the whole system.
Referring to fig. 1, a second cooling medium flow passage 15 is provided inside the heat exchanger 7, and corresponds to the first cooling medium flow passage 8, the second cooling medium flow passage 15 flows a cooling medium, the cooling medium may be cooling liquid, cooling gas, or the like, and the second cooling medium flow passage 15 is communicated with the first cooling medium flow passage 8, so as to realize the circulation flow of the cooling medium. The heat exchanger 7 has a through airflow channel, the airflow channel is communicated with the second air outlet 14, and the gas discharged from the second air outlet 14 enters the airflow channel to exchange heat with the cooling medium in the second cooling medium channel 15, so as to reduce the temperature of the cooling medium in the second cooling medium channel 15. In the work, gaseous still can expand fast and discharge to the surrounding atmosphere environment when promoting turbine 5 is rotatory, its pressure descends rapidly, and its temperature reduces by a wide margin, about 0 ~ 15 degree centigrade, then, gets into heat exchanger 7, and the cooling medium of cold air through heat exchanger 7 cooling motor improves motor stator 10 cooling medium's temperature, and the motor can obtain more effective cooling, and the heat that the motor produced is taken away more easily, has reduced the temperature of motor during operation. The cooling water of the motor stator 10 of the existing fuel cell compressor is from a cooling water circulation system in an automobile engine, because the installation space of the automobile engine is limited, the working environment is severe, the engine generates much heat, the flow of the cooling water allowed to be used is limited, the temperature of the cooling water entering the cooling water jacket of the motor stator 10 usually reaches about 60 ℃ or even higher, the cooling effect on the motor is not ideal, and the service lives of the motor and the engine are influenced. In the embodiment, the heat exchanger 7 is arranged, so that the secondary recycling of the exhaust gas of the compressor is realized, the cold air at the end of the turbine 5 is recycled again to cool the motor, the insulation life of the motor is prolonged, and the service life of the motor is prolonged.
It will be appreciated that the heat exchanger 7 may be formed in a single piece or in a multi-piece assembly, wherein the second cooling medium flow channels 15 may be formed by casting, drilling or the like. Preferably, referring to fig. 1, the heat exchanger 7 comprises a first member 16 and a second member 17, and the first member 16 is internally provided with a through air flow channel; the second member 17 is provided outside the first member 16 and is sealingly connected to the first member 16 by welding, sealing strips, or the like, to prevent leakage of the cooling medium. The second cooling medium flow passage 15 is arranged between the first part 16 and the second part 17, gas exhausted by the turbine 5 mechanism is exhausted through the gas flow passage, and heat exchange is realized between the medium in the second cooling medium flow passage 15 and the gas.
In some embodiments, referring to fig. 1, the first member 16 and the second member 17 are both cylindrical, the outer wall surface of the first member 16 is provided with a first groove along the circumferential direction, the second member 17 is sleeved outside the first member 16 and closes the first groove, the second member 17 is provided with a first cooling medium inlet 18 and a first cooling medium outlet 19 which are communicated with the first groove, it can be understood that the first cooling medium inlet 18 and the first cooling medium outlet 19 do not define a specific cooling medium flowing direction, which can adjust the inlet and outlet direction of the cooling medium according to specific conditions, the cooling medium enters from the first cooling medium inlet 18 and flows out from the first cooling medium outlet 19, so as to achieve the heat circulation, wherein the first groove is located on the outer wall surface of the first member 16, so that the forming process is simpler and more convenient.
In some embodiments, referring to fig. 1, the first component 16 is provided with first guide ribs 20 in the first grooves, the ends of the first guide ribs 20 abut against the second component 17, the first guide ribs 20 are arranged along the axial direction or the circumferential direction, and the first guide ribs 20 are used for guiding the flow direction of the cooling medium in the first grooves to form a second cooling medium flow passage 15 which is zigzag and circuitous, so that the cooling medium can fully exchange heat with the gas in the gas flow passage.
Referring to fig. 1, the hollow inner hole of the first component 16 forms an air flow channel, the flow resistance of the cylindrical inner hole is smaller, a plurality of blades 21 are arranged on the hole wall of the inner hole of the first component 16, each blade 21 extends along the length direction of the inner hole, the plurality of blades 21 are uniformly distributed along the circumferential direction of the inner hole, a gap is reserved between the adjacent blades 21, sawteeth 22 are arranged on the surfaces of the blades 21, the heat dissipation area of the blades 21 and the sawteeth 22 is greatly increased, and cooling media are cooled more sufficiently.
Referring to fig. 1 and 2, the heat exchanger 7 is connected with the air compression mechanism, which can cause adverse effect on the exhaust of the air compression mechanism, in order to reduce the adverse effect, the ends of a plurality of blades 21 define a through area 23 with a circular cross section in the air flow channel, and the gap between the through area 23 and the blades 21 provides a flow path for air, and the embodiment reasonably balances the heat dissipation and the exhaust resistance, and has the heat exchange and exhaust effects.
It can be understood that the second volute 6 is directly or indirectly connected with the heat exchanger 7, and the arrangement positions of the second volute 6 and the heat exchanger 7 can be flexibly set according to specific space. In some embodiments, referring to fig. 1, the second volute 6 is connected to an end portion of the heat exchanger 7, the second gas outlet 14 is expanded and butted with the gas flow channel, the gas can expand by expanding at the second gas outlet 14, further cooling and pressure reduction are achieved, an end portion of the heat exchanger 7 is provided with a caulking groove, an end portion of the second volute 6 is embedded in the caulking groove, a flange 24 is arranged on the periphery of the end portion of the second volute 6, and the flange 24 is connected with the heat exchanger 7 through a fastening member.
It will be appreciated that the casing 1 may be formed from a single component or a multiple component assembly in which the first coolant flow channels 8 are formed by casting, drilling or the like. Preferably, referring to fig. 1, the casing 1 includes an inner casing 25 and an outer casing 26, an outer wall surface of the inner casing 25 is provided with a second groove along a circumferential direction, the outer casing 26 is sleeved outside the inner casing 25 and closes the second groove, the outer casing 26 is provided with a second cooling medium inlet 27 and a second cooling medium outlet 28 which are communicated with the second groove, it is understood that the second cooling medium inlet 27 and the second cooling medium outlet 28 do not limit a specific cooling medium flowing direction, and an inlet and outlet direction of the cooling medium can be adjusted according to specific situations. The first cooling medium outlet 19 communicates with the second cooling medium inlet 27 through a pipe. In this embodiment, the main body of the housing 1 is formed by assembling two components, so that the first cooling medium flow channel 8 can be processed more conveniently, and the first cooling medium flow channel 8 with better heat exchange efficiency can be formed.
Referring to fig. 1, the stator 10 is attached to the inner surface of the inner housing 25, and heat generated by the motor assembly can directly exchange heat with the cooling medium in the first cooling medium flow passage 8 through the inner housing 25, so that the heat exchange efficiency is better.
Referring to fig. 1, in some embodiments, the inner casing 25 is provided with second guide ribs 29 in the second grooves, ends of the second guide ribs 29 are abutted to the outer casing 26, the second guide ribs 29 are arranged along the axial direction or the circumferential direction, and the second guide ribs 29 are used for guiding the flow direction of the cooling medium in the second grooves to form a zigzag and circuitous second cooling medium flow passage 15, so that the cooling medium can realize sufficient heat exchange with the motor assembly.
Referring to fig. 3, an embodiment of the present invention further provides a hydrogen fuel cell system including a stack 30 and the centrifugal compressor in any of the above embodiments, wherein the stack 30 has a third air inlet and a third air outlet, the first air outlet 12 is communicated with the third air inlet, and the third air outlet is communicated with the second air inlet 13. The high pressure gas compressed by the centrifugal compressor enters the stack 30 to provide a relatively high gas pressure environment for the hydrogen fuel cells. The technical features and effects of the centrifugal compressor have been described in detail above and will not be described in detail.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (9)
1. A centrifugal compressor characterized by: comprises that
A casing provided with a first cooling medium flow passage;
the rotating shaft penetrates through the shell;
the impeller is connected with one end of the rotating shaft;
the motor assembly comprises a rotor and a stator, the rotor is connected with the rotating shaft, and the stator is arranged on the outer side of the rotor and connected with the shell;
the first volute is connected with the shell and covers the outer side of the impeller, and a first air inlet and a first air outlet are formed in the first volute;
the turbine is connected with the other end of the rotating shaft;
the second volute is connected with the machine shell and covers the outer side of the turbine, and a second air inlet and a second air outlet are formed in the second volute; and
the heat exchanger is internally provided with a second cooling medium flow passage which is communicated with the first cooling medium flow passage, the heat exchanger is provided with a through air flow passage, and the air flow passage is communicated with the second air outlet;
the second volute is connected with the end of the heat exchanger, the second air outlet is expanded outwards and is in butt joint with the airflow channel, the gas discharged from the second air outlet enters the airflow channel to exchange heat with the cooling medium in the second cooling medium channel, and the cold air cools the cooling medium of the motor through the heat exchanger.
2. The centrifugal compressor of claim 1, wherein: the heat exchanger comprises
The first component is internally provided with the through air flow channel;
and a second member provided outside the first member and hermetically connected to the first member, wherein the second cooling medium channel is provided between the first member and the second member.
3. The centrifugal compressor of claim 2, wherein: the first component and the second component are both cylindrical, a first groove is formed in the outer wall surface of the first component along the circumferential direction, the second component is sleeved on the outer side of the first component and seals the first groove, and a first cooling medium inlet and a first cooling medium outlet which are communicated with the first groove are formed in the second component.
4. The centrifugal compressor of claim 3, wherein: the first component is provided with a first flow guide convex rib in the first groove.
5. The centrifugal compressor of claim 3, wherein: the hollow hole of first part forms airflow channel, establish a plurality of blades on the pore wall of hole, each the blade all extends along the length direction of hole, and is a plurality of the blade is followed the circumference evenly distributed of hole, adjacent leave the clearance between the blade, it is a plurality of the tip of blade is in it is circular shape to inject the cross-section to link up the region in airflow channel, the surface of blade is equipped with the sawtooth.
6. The centrifugal compressor of claim 1, wherein: the end part of the heat exchanger is provided with an embedded groove, the end part of the second volute is embedded into the embedded groove, the periphery of the end part of the second volute is provided with a flange, and the flange is connected with the heat exchanger through a fastening piece.
7. The centrifugal compressor of claim 3, wherein: the housing comprises
The outer wall surface of the inner shell is provided with a second groove along the circumferential direction;
the outer shell is sleeved on the outer side of the inner shell and seals the second groove, a second cooling medium inlet and a second cooling medium outlet which are communicated with the second groove are formed in the outer shell, and the first cooling medium outlet is communicated with the second cooling medium inlet through a pipeline.
8. The centrifugal compressor of claim 7, wherein: the stator is attached to the inner surface of the inner shell, and the inner shell is provided with a second flow guide protruding rib in the second groove.
9. A hydrogen fuel cell system characterized by: comprises that
The electric pile is provided with a third air inlet and a third air outlet;
the centrifugal compressor of any one of claims 1-8, the first outlet port being in communication with the third inlet port, the third outlet port being in communication with the second inlet port.
Priority Applications (1)
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| CN111255707B (en) * | 2020-04-02 | 2024-10-29 | 上海优社动力科技有限公司 | A kind of compressor |
| CN112761972B (en) * | 2021-02-04 | 2023-01-31 | 潍坊富源增压器有限公司 | Air compressor for fuel cell |
| CN113280005A (en) * | 2021-06-02 | 2021-08-20 | 西安交通大学 | Active cooling noise reduction device, vehicle fuel cell centrifugal air compressor and control method |
| CN115750404A (en) * | 2022-11-25 | 2023-03-07 | 重庆长安新能源汽车科技有限公司 | Compressor assembly for fuel cell, fuel cell and electric equipment |
| CN117006073A (en) * | 2023-08-22 | 2023-11-07 | 苏州氢启新能源科技有限公司 | Self-pressurizing cooling hydrogen fuel cell air compressor |
| CN119616887B (en) * | 2024-12-09 | 2025-11-14 | 南京奥斯行系统工程有限公司 | A magnetically levitated centrifugal two-stage oxygen compressor with an oxygen air-cooling system |
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| EP1249578B1 (en) * | 2001-04-11 | 2006-10-11 | Siemens Aktiengesellschaft | Cooling of a gas turbine |
| FR2831929B1 (en) * | 2001-11-02 | 2004-02-06 | Valeo Climatisation | MOTOR-FAN GROUP WITH AN INTEGRATED RADIATOR |
| FR2873751B1 (en) * | 2004-07-28 | 2006-09-29 | Snecma Moteurs Sa | INPUT CONE OF A TURBOMACHINE |
| CN2771785Y (en) * | 2005-02-07 | 2006-04-12 | 邹昌校 | Sleeving-pipe type heat exchanger |
| CN101451464A (en) * | 2007-12-03 | 2009-06-10 | 上海空间电源研究所 | Fuel cell engine air turbine compressor with energy recovery |
| US10069154B2 (en) * | 2011-08-24 | 2018-09-04 | Borgwarner Inc. | Air feed device for a fuel cell |
| CN206071920U (en) * | 2016-09-26 | 2017-04-05 | 南京磁谷科技有限公司 | A kind of air-cooled aerator of fan-free reverse-flow type |
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| CN206683439U (en) * | 2017-04-20 | 2017-11-28 | 广东高村空调制造有限公司 | A kind of fin heat exchanger |
| CN107893772B (en) * | 2017-10-09 | 2020-05-22 | 中国第一汽车股份有限公司 | Centrifugal fuel cell air compressor with energy recovery function |
| CN109372775B (en) * | 2018-11-20 | 2024-08-13 | 势加透博（北京）科技有限公司 | Two-stage compressed air supply system of fuel cell |
| CN110148767B (en) * | 2019-06-18 | 2024-04-02 | 势加透博（北京）科技有限公司 | Two-stage hydrogen fuel cell stack gas supply device driven by motor |
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