CN113280005A - Active cooling noise reduction device, vehicle fuel cell centrifugal air compressor and control method - Google Patents
Active cooling noise reduction device, vehicle fuel cell centrifugal air compressor and control method Download PDFInfo
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- CN113280005A CN113280005A CN202110615865.9A CN202110615865A CN113280005A CN 113280005 A CN113280005 A CN 113280005A CN 202110615865 A CN202110615865 A CN 202110615865A CN 113280005 A CN113280005 A CN 113280005A
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage 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
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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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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- 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)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The active cooling noise reduction device comprises a noise reducer outer cylinder and a noise reducer inner cylinder which are nested, a noise reducer outer baffle and a noise reducer inner baffle are arranged between the noise reducer outer cylinder and the noise reducer inner cylinder, the noise reducer outer baffles are two and are arranged at two ends, and the noise reducer inner baffles are provided with a plurality of noise reducer outer baffles and are arranged between the two noise reducer outer baffles; the two ends of the noise reducer inner cylinder are provided with a noise reducer air inlet and a noise reducer air outlet, the outer wall of the noise reducer inner cylinder is divided into a plurality of areas through noise reducer inner baffles, and the noise reducer inner cylinder is provided with a plurality of air holes corresponding to each area; the outer cylinder of the noise reducer is provided with an outer cylinder cooling medium annular flow passage, and a cooling medium inlet and a cooling medium outlet are formed in the outer cylinder of the noise reducer; the inner baffle of the noise reducer is provided with an inner baffle cooling medium flow passage. According to the invention, the pulsation attenuation of the gas is realized by the Helmholtz resonator principle, so that the compactness of the air compressor system is improved while the energy conservation and the noise reduction are ensured.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to an active cooling noise reduction device, a centrifugal air compressor of a vehicle fuel cell and a control method.
Background
Compressor technology has always been an important life-cycle technology in the industrial field, and high energy efficiency and low noise are constantly pursued development targets for compressors. In the application occasion of multi-stage compression, the interstage cooling of the compressor can enable the working process of the compressor to be closer to an isothermal process, and further the unit energy efficiency of the compressor can be remarkably improved. Particularly, in a fuel cell system for vehicles, which is being widely used, an air compressor is required to have high energy efficiency, low noise, and high compactness as a core component and a main component for consuming energy, so as to meet the requirements of environmental protection and comfort of a fuel cell vehicle.
Helmholtz resonators are a basic device in acoustics, consisting of a pipe stub and a vessel. When the gas flows through the short pipe, the pressure in the container is changed, namely when part of the gas enters the space in the container, the pressure of the gas in the container is increased, and the pressure is increased to try to push out the part of the gas; conversely, as a portion of the gas leaves the attenuator chamber volume, the gas pressure within the container decreases, which in turn attempts to "pull" the gas back into the container. Thus, the container acts like a spring, and the gas in the neck acts like a mass element. When the disturbance frequency of the spring to the mass element is equal to the natural frequency of the air column, sound waves generated by disturbance can be superposed with incident sound waves of the air column, so that the amplitude of downstream sound waves is effectively reduced.
Generally, the interstage cooling and noise reduction component is two components, and the application of the interstage cooling and noise reduction component can increase the volume of the air compressor system and reduce the compactness of the air compressor. In particular, in fuel cell vehicles, fuel cell stacks place higher demands on the air compressor exhaust, and the vehicle space also demands higher compactness of the air compressor. Therefore, practical and effective means are needed to realize interstage cooling, improve the efficiency of the air compressor and reduce noise while ensuring the compactness of the air compressor system.
Disclosure of Invention
The invention aims to provide an active cooling noise reduction device, a centrifugal air compressor of a vehicle fuel cell and a control method aiming at the problems that interstage cooling and noise reduction components in the prior art are compact and the performance of the interstage cooling and noise reduction components is difficult to meet the requirements of the vehicle fuel cell.
In order to achieve the above purpose, the present invention has the following beneficial effects:
an active cooling noise reduction device comprises a noise reducer outer cylinder and a noise reducer inner cylinder which are nested together, wherein two noise reducer outer baffles and two noise reducer inner baffles are arranged between the inner wall of the noise reducer outer cylinder and the outer wall of the noise reducer inner cylinder, and are arranged at two ends; the noise reducer inner cylinder is provided with a noise reducer air inlet and a noise reducer air outlet at two ends, the outer wall of the noise reducer inner cylinder is divided into a plurality of areas through noise reducer inner baffles, the noise reducer inner cylinder is provided with a plurality of air holes corresponding to each area, and a noise reducer air channel is arranged inside the noise reducer inner cylinder; the outer cylinder of the noise reducer is provided with an outer cylinder cooling medium annular flow passage and is provided with a cooling medium inlet and a cooling medium outlet; the inner baffle of the noise reducer is provided with an inner baffle cooling medium flow passage.
As a preferable scheme of the active cooling noise reduction device, the cooling medium flow passage of the inner baffle is communicated with the annular flow passage of the cooling medium of the outer cylinder, or is a closed flow passage which is not communicated.
As a preferable scheme of the active cooling noise reduction device of the present invention, the number of the air holes opened in each region of the noise reducer inner cylinder according to the air flow direction is sequentially increased.
As a preferable scheme of the active cooling noise reduction device, the outer cylinder of the noise reducer and the inner cylinder of the noise reducer are coaxially embedded together.
The invention also provides a vehicle fuel cell centrifugal air compressor, which comprises a two-stage vehicle fuel cell centrifugal air compressor and the active cooling noise reduction device, wherein the first-stage vehicle fuel cell centrifugal air compressor comprises a first-stage volute, a first-stage impeller and a first-stage diffuser, an air inlet is formed in the first-stage volute, the second-stage vehicle fuel cell centrifugal air compressor comprises a second-stage volute, a second-stage impeller and a second-stage diffuser, the second-stage volute is connected with the exhaust side of the first-stage volute through an intermediate pipeline, clean air enters the first-stage impeller from the air inlet to be accelerated and pressurized, and then enters the intermediate pipeline after being secondarily accelerated and pressurized through the first-stage diffuser and the first; clean air entering a centrifugal air compressor of a second-stage vehicle fuel cell from an intermediate pipeline is firstly accelerated and pressurized by a second-stage impeller and then discharged after being secondarily accelerated and pressurized by a second-stage diffuser and a second-stage volute, and an air outlet is formed in the exhaust side of the second-stage volute; the active cooling noise reduction device is arranged on the intermediate pipeline.
The invention also provides a vehicle fuel cell centrifugal air compressor, which comprises a two-stage vehicle fuel cell centrifugal air compressor and the active cooling noise reduction device, wherein the first-stage vehicle fuel cell centrifugal air compressor comprises a first-stage volute, a first-stage impeller and a first-stage diffuser, an air inlet is formed in the first-stage volute, the second-stage vehicle fuel cell centrifugal air compressor comprises a second-stage volute, a second-stage impeller and a second-stage diffuser, the second-stage volute is connected with the exhaust side of the first-stage volute through an intermediate pipeline, clean air enters the first-stage impeller from the air inlet to be accelerated and pressurized, and then enters the intermediate pipeline after being secondarily accelerated and pressurized through the first-stage diffuser and the first-stage volute; clean air entering a centrifugal air compressor of a second-stage vehicle fuel cell from an intermediate pipeline is firstly accelerated and pressurized by a second-stage impeller and then discharged after being secondarily accelerated and pressurized by a second-stage diffuser and a second-stage volute, and an air outlet is formed in the exhaust side of the second-stage volute; the active cooling noise reduction device is arranged on the air outlet.
The invention also provides a control method of the centrifugal air compressor for the vehicle fuel cell, clean air enters the first-stage impeller from the air inlet, is subjected to speed-increasing pressurization, then enters the intermediate pipeline after being further pressurized by the first-stage diffuser and the first-stage volute, then enters the second-stage impeller for speed-increasing pressurization again, and finally leaves the air compressor from the air outlet after passing through the second-stage diffuser and the second-stage volute.
The invention is a preferable scheme of the control method of the centrifugal air compressor of the vehicle fuel cell:
the cooling medium flow channel of the inner baffle is communicated with the cooling medium annular flow channel of the outer cylinder, so that the heat exchange area between the cooling medium and air is increased;
or the cooling medium flow channel of the inner baffle is set to be a closed flow channel which is not communicated with the annular flow channel of the cooling medium of the outer barrel, so that the air is cooled by utilizing the heat pipe principle.
Compared with the prior art, the invention has the following beneficial effects: the air is cooled through the heat convection of the cooling medium and the air of the compressor, so that the efficiency of the compressor is improved, the air exhaust temperature is lower, and the air compressor is safer and more reliable. The outer cylinder of the noise reducer is provided with an outer cylinder cooling medium annular flow channel, the inner baffle of the noise reducer is provided with an inner baffle cooling medium flow channel, a heat pipe principle or fins can be realized by utilizing the inner baffle of the noise reducer, and then the heat exchange area is increased, so that the heat exchange effect between gas and the cooling medium is enhanced. The invention realizes pulsation attenuation to gas by using the Helmholtz resonator principle, thereby reducing pneumatic noise induced by airflow pulsation. Compared with the prior interstage cooling and noise reduction component which is two components, the invention can combine the noise reduction and cooling functions, thereby ensuring the energy saving and noise reduction effects and obviously improving the compactness of the air compressor system.
Drawings
FIG. 1 is a schematic structural diagram of an active cooling and noise reduction device of a centrifugal air compressor for a vehicle fuel cell according to the present invention, which is mounted in an intermediate duct;
FIG. 2 is a schematic perspective view of an active cooling noise reduction apparatus according to the present invention;
FIG. 3 is a schematic cross-sectional view of an active cooling noise reduction apparatus according to the present invention;
FIG. 4 is a schematic structural view of the active cooling noise reduction device of the centrifugal air compressor for the vehicle fuel cell of the present invention installed at the air outlet;
in the drawings: 1-vehicle fuel cell centrifugal air compressor; 2-actively cooling the noise reduction device; 3-an air inlet; 4-first-stage impeller; 5-a first stage diffuser; 6-first-stage volute; 7-an intermediate pipe; 8-a two-stage impeller; 9-a two-stage diffuser; 10-a two-stage volute; 11-an air outlet; 12-a noise reducer outer cylinder; 13-noise reducer inner baffles; 14-a noise reducer inner cylinder; 15-noise reducer outer baffle; 16-cooling medium inlet; 17-outlet for cooling medium; 18-outer cylinder cooling medium annular flow channel; 19-inner baffle cooling medium flow channel; 20-a noise reducer air inlet; 21-noise reducer air outlet; 22-noise reducer air channel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 2 and 3, the active cooling noise reduction device of the present invention comprises a noise reducer outer cylinder 12 and a noise reducer inner cylinder 14 which are nested together, and in a preferred embodiment, the noise reducer outer cylinder 12 and the noise reducer inner cylinder 14 are nested together coaxially.
The noise reducer outer baffle 15 and the noise reducer inner baffle 13 are arranged between the inner wall of the noise reducer outer barrel 12 and the outer wall of the noise reducer inner barrel 14, the noise reducer outer baffles 15 are two and are arranged at two ends, and the noise reducer inner baffle 13 is provided with a plurality of and is arranged between the two noise reducer outer baffles 15. The two ends of the noise reducer inner cylinder 14 are provided with a noise reducer air inlet 20 and a noise reducer air outlet 21, the outer wall of the noise reducer inner cylinder 14 is divided into a plurality of areas through the noise reducer inner baffle 13, the cylinder wall of the noise reducer inner cylinder 14 is provided with a plurality of air holes corresponding to each area, and the inner cavity of the noise reducer inner cylinder 14 is a noise reducer air channel 22. In a preferred embodiment, the number of the air holes opened in each region of the noise reducer inner cylinder 14 increases in the air flow direction.
The outer cylinder 12 of the noise reducer is provided with an outer cylinder cooling medium annular flow passage 18 and is provided with a cooling medium inlet 16 and a cooling medium outlet 17; the noise reducer inner baffle 13 is provided with an inner baffle cooling medium flow passage 19. The inner baffle plate cooling medium flow passage 19 is communicated with the outer cylinder cooling medium annular flow passage 18 or is a closed flow passage which is not communicated. When the inner baffle plate cooling medium flow passage 19 is communicated with the outer cylinder cooling medium annular flow passage 18, a fin structure is formed, and the heat exchange area between the cooling medium and the gas can be increased; when the cooling medium channel 19 of the inner baffle is a closed channel, the gas is cooled by utilizing the heat pipe principle.
The active cooling noise reduction device can be arranged on the middle pipeline 7 of the two-stage vehicle fuel cell centrifugal air compressor 1 and is used for cooling and reducing noise of middle gas of the multi-stage compressor; and the air outlet 11 can also be arranged at the air outlet 11 of the two-stage vehicle fuel cell centrifugal air compressor 1 and is used for cooling exhaust and reducing noise.
As shown in fig. 1, the active cooling noise reduction device of the present invention is disposed in the middle duct 7 of the two-stage centrifugal air compressor 1 for vehicle fuel cell, which comprises the two-stage centrifugal air compressor 1 for vehicle fuel cell and the active cooling noise reduction device 2, the first-stage vehicle fuel cell centrifugal air compressor 1 comprises a first-stage volute 6, a first-stage impeller 4 and a first-stage diffuser 5, an air inlet 3 is formed in the first-stage volute 6, the second-stage vehicle fuel cell centrifugal air compressor 1 comprises a second-stage volute 10, a second-stage impeller 8 and a second-stage diffuser 9, the second-stage volute 10 is connected with the exhaust side of the first-stage volute 6 through an intermediate pipeline 7, clean air enters the first-stage impeller 4 from the air inlet 3 to be accelerated and pressurized, and then enters the intermediate pipeline 7 after being accelerated and pressurized secondarily through the first-stage diffuser 5 and the first-stage volute 6; clean air entering the second-stage vehicle fuel cell centrifugal air compressor 1 through the intermediate pipeline 7 is firstly accelerated and pressurized through the second-stage impeller 8 and then discharged after being secondarily accelerated and pressurized through the second-stage diffuser 9 and the second-stage volute 10, and an air outlet 11 is formed in the exhaust side of the second-stage volute 10. The invention applies the Helmholtz resonator principle to attenuate the airflow pulsation amplitude with specific frequency to the air passing through the air channel 22 of the noise reducer, thereby realizing the purpose of reducing the pneumatic noise of the compressor, and the cooling medium in the outer cylinder 12 of the noise reducer and the inner baffle 13 of the noise reducer can cool the air discharged by the centrifugal air compressor 1 of the first-stage vehicle fuel cell, thereby realizing the purposes of improving the efficiency of the air compressor and increasing the compactness and the environmental protection of the air compressor.
As shown in fig. 4, the active cooling noise reduction device of the present invention may also be disposed at the air outlet 11 of the second-stage vehicle fuel cell centrifugal air compressor 1. The active cooling noise reduction device can reduce the air flow pulsation and temperature of the exhaust of the compressor, reduce the aerodynamic noise of the compressor, and make the exhaust temperature of the compressor more suitable for application in occasions such as fuel cell stacks and the like, and has good compactness.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and it should be understood by those skilled in the art that the technical solution can be modified and replaced by a plurality of simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall into the protection scope covered by the claims.
Claims (8)
1. An active cooling noise reduction device, characterized by: the noise reducer comprises a noise reducer outer cylinder (12) and a noise reducer inner cylinder (14) which are embedded and arranged together, wherein two noise reducer outer baffles (15) and two noise reducer inner baffles (13) are arranged between the inner wall of the noise reducer outer cylinder (12) and the outer wall of the noise reducer inner cylinder (14), the noise reducer outer baffles (15) are arranged at two ends, and the noise reducer inner baffles (13) are provided with a plurality of noise reducer outer baffles (15) and are arranged between the two noise reducer outer baffles (15);
the noise reducer comprises a noise reducer inner cylinder (14), wherein two ends of the noise reducer inner cylinder (14) are provided with a noise reducer air inlet (20) and a noise reducer air outlet (21), the outer wall of the noise reducer inner cylinder (14) is divided into a plurality of areas through a noise reducer inner baffle (13), the noise reducer inner cylinder (14) is provided with a plurality of air holes corresponding to each area, and a noise reducer air channel (22) is arranged inside the noise reducer inner cylinder (14);
the outer cylinder (12) of the noise reducer is provided with an outer cylinder cooling medium annular flow passage (18) and is provided with a cooling medium inlet (16) and a cooling medium outlet (17); the inner baffle (13) of the noise reducer is provided with an inner baffle cooling medium flow passage (19).
2. The active cooling noise reduction device of claim 1, wherein: the inner baffle cooling medium flow passage (19) is communicated with the outer barrel cooling medium annular flow passage (18) or is a closed flow passage which is not communicated.
3. The active cooling noise reduction device of claim 1, wherein: the number of the air holes formed in each area of the noise reducer inner cylinder (14) is increased in sequence according to the air flow direction.
4. The active cooling noise reduction device of claim 1, wherein: the outer cylinder (12) of the noise reducer and the inner cylinder (14) of the noise reducer are coaxially embedded together.
5. The utility model provides an automobile-used fuel cell centrifugal air compressor machine which characterized in that: comprising a two-stage fuel cell centrifugal air compressor (1) for a vehicle and an active cooling and noise reducing device (2) according to any one of claims 1 to 4, the first-stage vehicle fuel cell centrifugal air compressor (1) comprises a first-stage volute (6), a first-stage impeller (4) and a first-stage diffuser (5), an air inlet (3) is formed in the first-stage volute (6), the second-stage vehicle fuel cell centrifugal air compressor (1) comprises a second-stage volute (10), a second-stage impeller (8) and a second-stage diffuser (9), the second-stage volute (10) is connected with the exhaust side of the first-stage volute (6) through an intermediate pipeline (7), clean air enters the first-stage impeller (4) from the air inlet (3) to be accelerated and pressurized, and then enters the intermediate pipeline (7) after being accelerated and pressurized secondarily through the first-stage diffuser (5) and the first-stage volute (6); clean air entering a second-stage vehicle fuel cell centrifugal air compressor (1) from an intermediate pipeline (7) is firstly accelerated and pressurized by a second-stage impeller (8) and then discharged after being accelerated and pressurized for the second time by a second-stage diffuser (9) and a second-stage volute (10), and an air outlet (11) is formed in the exhaust side of the second-stage volute (10); the active cooling noise reduction device (2) is arranged on the intermediate pipeline (7).
6. The utility model provides an automobile-used fuel cell centrifugal air compressor machine which characterized in that: comprising a two-stage fuel cell centrifugal air compressor (1) for a vehicle and an active cooling and noise reducing device (2) according to any one of claims 1 to 4, the first-stage vehicle fuel cell centrifugal air compressor (1) comprises a first-stage volute (6), a first-stage impeller (4) and a first-stage diffuser (5), an air inlet (3) is formed in the first-stage volute (6), the second-stage vehicle fuel cell centrifugal air compressor (1) comprises a second-stage volute (10), a second-stage impeller (8) and a second-stage diffuser (9), the second-stage volute (10) is connected with the exhaust side of the first-stage volute (6) through an intermediate pipeline (7), clean air enters the first-stage impeller (4) from the air inlet (3) to be accelerated and pressurized, and then enters the intermediate pipeline (7) after being accelerated and pressurized secondarily through the first-stage diffuser (5) and the first-stage volute (6); clean air entering a second-stage vehicle fuel cell centrifugal air compressor (1) from an intermediate pipeline (7) is firstly accelerated and pressurized by a second-stage impeller (8) and then discharged after being accelerated and pressurized for the second time by a second-stage diffuser (9) and a second-stage volute (10), and an air outlet (11) is formed in the exhaust side of the second-stage volute (10); the active cooling noise reduction device (2) is arranged on the air outlet (11).
7. A control method of a centrifugal air compressor for a vehicle fuel cell according to claim 5 or 6, characterized in that: clean air enters the first-stage impeller (4) from the air inlet (3) to be accelerated and pressurized, then enters the intermediate pipeline (7) after being further pressurized through the first-stage diffuser (5) and the first-stage volute (6), then enters the second-stage impeller (8) to be accelerated and pressurized again, and finally leaves the air compressor from the air outlet (11) through the second-stage diffuser (9) and the second-stage volute (10).
8. The control method according to claim 7, characterized in that:
the cooling medium flow passage (19) of the inner baffle is communicated with the cooling medium annular flow passage (18) of the outer cylinder, so that the heat exchange area between the cooling medium and air is increased;
or the inner baffle plate cooling medium flow passage (19) is set to be a closed flow passage which is not communicated with the outer cylinder cooling medium annular flow passage (18), so that air is cooled by utilizing the heat pipe principle.
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| CN202110615865.9A CN113280005A (en) | 2021-06-02 | 2021-06-02 | Active cooling noise reduction device, vehicle fuel cell centrifugal air compressor and control method |
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| CN202110615865.9A CN113280005A (en) | 2021-06-02 | 2021-06-02 | Active cooling noise reduction device, vehicle fuel cell centrifugal air compressor and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113738661A (en) * | 2021-09-27 | 2021-12-03 | 安徽润安思变能源技术有限公司 | Gas suspension centrifugal compressor and gas supply system thereof |
| CN114838234A (en) * | 2022-05-25 | 2022-08-02 | 苏州德兰能源科技股份有限公司 | Full-bore non-pressure-drop noise reducer |
| CN114857043A (en) * | 2022-04-21 | 2022-08-05 | 珠海格力电器股份有限公司 | Air compressor, fuel cell and new energy vehicle |
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| CN201246208Y (en) * | 2008-08-13 | 2009-05-27 | 济南吉美乐电源技术有限公司 | Internal combustion engine liquid cooling silencer |
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| CN210889258U (en) * | 2019-09-23 | 2020-06-30 | 好米动力设备有限公司 | Cooling and noise reducing device between compressor stages |
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