CN115224300A - Hydrogen ejector capable of accurately adjusting fuel cell circulating system - Google Patents
Hydrogen ejector capable of accurately adjusting fuel cell circulating system Download PDFInfo
- Publication number
- CN115224300A CN115224300A CN202210911010.5A CN202210911010A CN115224300A CN 115224300 A CN115224300 A CN 115224300A CN 202210911010 A CN202210911010 A CN 202210911010A CN 115224300 A CN115224300 A CN 115224300A
- Authority
- CN
- China
- Prior art keywords
- ejector
- hydrogen
- shell
- fuel cell
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 61
- 239000001257 hydrogen Substances 0.000 title claims abstract description 61
- 239000000446 fuel Substances 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
-
- 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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
-
- 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
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
-
- 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
-
- 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 invention discloses a hydrogen ejector capable of accurately adjusting a fuel cell circulating system, which comprises an ejector shell, a swinging spray pipe and an adjusting mechanism, wherein the ejector shell is provided with a swinging spray pipe; the swing spray pipe comprises a working fluid inlet pipe, a hose and a working nozzle, the working fluid inlet pipe and the hose are respectively fixed on the outer side and the inner side of the front end face of the ejector shell, and the working nozzle is connected with the rear end of the hose; the adjusting mechanism comprises a sealing installation shell, a driving motor and a push rod, the sealing installation shell is fixedly installed on one side of the ejector shell, the driving motor is fixedly installed in the sealing installation shell, an output shaft of the driving motor is connected with the push rod, and the lower end of the push rod is fixed to the outer side of the working nozzle. The driving motor drives the push rod to push the working nozzle to deviate from the central axis of the ejector in the ejector mixing chamber to change the ejection coefficient of the hydrogen ejector, so that the requirement of the hydrogen circulation volume of the hydrogen fuel cell system is accurately met under variable working conditions.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to a hydrogen ejector capable of accurately adjusting a fuel cell circulating system.
Background
In the anode circulation system of the fuel cell, a hydrogen circulation pump or a hydrogen ejector is usually adopted to realize the recycling of hydrogen. Although the hydrogen circulating pump can realize the regulation of hydrogen circulation volume under the variable working condition, the hydrogen circulating pump needs the consumption of electric energy, maintenance, production vibration, and occupation space is great. And the hydrogen ejector has no moving part, low cost and easy maintenance. However, after the structural size of the fuel cell stack is fixed, the output power range of the fuel cell stack caused by the narrow working condition range of the hydrogen ejector is small and cannot be adjusted. This greatly limits their development.
In order to overcome the problem, an adjustable ejector is adopted to meet the requirement of the hydrogen circulation volume of the hydrogen fuel cell system under the condition of variable working conditions. The adjustable ejector mainly changes the ejection coefficient of the hydrogen ejector by changing the area ratio of the sectional area of the constant section to the sectional area of the nozzle. At present, the adjustable ejector is mainly divided into two types: one is to change the size of the cross section area of the throat part of the nozzle in the hydrogen ejector through an adjusting needle; the other method changes the area ratio of the hydrogen ejector by adjusting the position of the plug cone in the mixing process. However, since the hydrogen ejector has a very small size, it is very difficult to precisely adjust the area ratio thereof. For example, a 80kW hydrogen fuel cell has an injector nozzle throat diameter of 1.2mm and a constant section diameter of 5.2mm. The small size is difficult to accurately adjust the area ratio, so that the hydrogen ejector is difficult to accurately meet the requirement of the hydrogen circulation amount of the hydrogen fuel cell system under variable working conditions.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a hydrogen ejector capable of accurately adjusting a fuel cell circulating system.
In order to achieve the purpose, the technical scheme of the invention is as follows: a hydrogen ejector capable of accurately adjusting a fuel cell circulating system comprises an ejector shell, a swinging spray pipe and an adjusting mechanism;
the inner cavity of the ejector shell is sequentially provided with a mixing chamber, a constant-section, a pressure expansion chamber and a mixed fluid outlet from front to back, and an ejector fluid inlet pipe is arranged at the lower side of the ejector shell;
the swing spray pipe comprises a working fluid inlet pipe, a hose and a working nozzle, the working fluid inlet pipe is fixedly arranged on the outer side of the front end face of the ejector shell, the front end of the hose is fixed on the inner side of the front end face of the ejector shell and is communicated with the working fluid inlet pipe, and the working nozzle is connected with the rear end of the hose;
the adjusting mechanism comprises a sealing installation shell, a driving motor and a push rod, the sealing installation shell is fixedly installed on one side of the ejector shell, the driving motor is fixedly installed in the sealing installation shell, an output shaft of the driving motor is connected with the push rod, and the lower end of the push rod is fixed to the outer side of the working nozzle.
Further, the working fluid inlet tube, hose and working nozzle are collinear in their axes when not in operation.
Furthermore, the driving motor is a micro servo motor and is connected with the control system through a control line.
Further, the push rod is a solid rod.
Further, the axial angle variation range of the working nozzle during working is-5 degrees.
Further, the adjusting mechanism is arranged on the upper side of the ejector shell, and the ejection fluid inlet pipe is arranged on the lower side of the ejector shell.
Further, the hose is a high pressure hose.
Compared with the prior art, the invention has the following beneficial effects:
the driving motor drives the push rod to push the working nozzle to deviate from the central axis of the ejector in the ejector mixing chamber to change the ejection coefficient of the hydrogen ejector, so that the requirement of the hydrogen circulation volume of the hydrogen fuel cell system is accurately met under variable working conditions.
Drawings
Fig. 1 is a structural view of an adjustable working nozzle type hydrogen ejector.
In the figure: 1. working fluid inlet pipe, 2, ejector casing, 3, high pressure hose, 4, working nozzle, 5, injection fluid inlet pipe, 6, mixing chamber, 7, constant cross-section, 8, diffusion chamber, 9, mixed fluid export, 10, driving motor, 11, push rod, 12, sealed installation shell.
Detailed Description
In order to facilitate understanding of the technical means and objectives of the present invention, the present invention will be further described with reference to the following embodiments. As shown in fig. 1, a hydrogen injector capable of precisely adjusting a fuel cell circulation system comprises an injector housing 2, a swing nozzle and an adjusting mechanism;
the inner cavity of the ejector shell 2 is sequentially provided with a mixing chamber 6, a constant-section 7, a diffusion chamber 8 and a mixed fluid outlet 9 from front to back, and the lower side of the ejector shell 2 is provided with an ejector fluid inlet pipe 5;
the swing spray pipe comprises a working fluid inlet pipe 1, a hose 3 and a working nozzle 4, the working fluid inlet pipe 1 is fixedly installed on the outer side of the front end face of the ejector shell 2, the front end of the hose 3 is fixed on the inner side of the front end face of the ejector shell 2 and is communicated with the working fluid inlet pipe 1, and the working nozzle 4 is connected with the rear end of the hose 3;
the adjusting mechanism comprises a sealing installation shell 12, a driving motor 10 and a push rod 11, wherein the sealing installation shell 12 is fixedly installed on one side of the ejector shell 2, the driving motor 10 is fixedly installed in the sealing installation shell 12, an output shaft of the driving motor 10 is connected with the push rod 11, and the lower end of the push rod 11 is fixed with the outer side of the working nozzle 4.
Further, the working fluid inlet pipe 1, the hose 3 and the working nozzle 4 are collinear in their axes when not in operation.
Further, the driving motor 10 is a micro servo motor and is connected with a control system through a control line.
Further, the push rod 11 is a solid rod.
Further, the axial angle of the working nozzle 4 during operation ranges from-5 ° to 5 °.
Further, the adjusting mechanism is arranged on the upper side of the ejector shell 2, and the ejection fluid inlet pipe 5 is arranged on the lower side of the ejector shell 2.
Further, the hose 3 is a high pressure hose.
The working principle of the invention is as follows:
in the hydrogen fuel cell system under the condition of variable working conditions, the injection coefficient of the hydrogen injector is changed by changing the angle formed by the axis of the working nozzle 4 and the axis of the mixing chamber 6 through the driving motor 10, so that the injection performance of the hydrogen injector can meet the actual requirement of the hydrogen fuel cell system.
When the hydrogen fuel cell has just started to operate, the operation nozzle 4 is coaxial with the mixing chamber 6. In this case, the power of the hydrogen fuel cell is the lowest, and the hydrogen circulation amount required for the hydrogen fuel cell is the largest.
When the hydrogen fuel cell is switched from the low-power working condition to the high-power working condition, the utilization rate of hydrogen in the hydrogen fuel cell is increased, the amount of hydrogen which does not participate in reaction is reduced, and the circulation amount of the hydrogen required by the hydrogen fuel cell is reduced. Therefore, the injection coefficient of the hydrogen injector needs to be reduced. At this time, the axis of the working nozzle 4 coincides with the axis of the mixing chamber 6. The driving motor 10 is operated to push the push rod 11, thereby deflecting the working nozzle 4 so that the axis of the working nozzle 4 forms an angle with the axis of the mixing chamber 6. When the angle is a certain value, the injection coefficient can meet the requirement of the fuel cell, and the driving motor 10 stops working.
When the hydrogen fuel cell is switched from a high-power working condition to a low-power working condition, the utilization rate of hydrogen in the hydrogen fuel cell is reduced, the amount of hydrogen which does not participate in reaction is increased, and the circulation amount of the hydrogen required by the hydrogen fuel cell is increased. Therefore, the injection coefficient of the hydrogen injector needs to be increased. The axis of the working nozzle 4 forms an angle with the axis of the mixing chamber 6, the injection coefficient of which corresponds to the high-power operating mode of the fuel cell. The driving motor 10 starts to work, the push rod 11 is pushed, and therefore the working nozzle 4 is driven to deflect, the working nozzle 4 moves towards the central axis of the ejector mixing chamber 6, and the angle value formed by the axis of the working nozzle 4 and the axis of the mixing chamber 6 is reduced. When the angle is reduced to a certain value, the injection coefficient can meet the requirement of the fuel cell, and the driving motor 10 stops working.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely illustrative and that various changes and modifications can be made in the embodiments of the invention without departing from the principles and spirit of the invention.
Claims (7)
1. The utility model provides a can accurate hydrogen ejector who adjusts fuel cell circulation system which characterized in that: comprises an ejector shell (2), a swinging spray pipe and an adjusting mechanism;
the inner cavity of the ejector shell (2) is sequentially provided with a mixing chamber (6), a constant-section (7), a diffusion chamber (8) and a mixed fluid outlet (9) from front to back, and an ejector fluid inlet pipe (5) is arranged on the lower side of the ejector shell (2);
the swing spray pipe comprises a working fluid inlet pipe (1), a hose (3) and a working nozzle (4), the working fluid inlet pipe (1) is fixedly installed on the outer side of the front end face of the ejector shell (2), the front end of the hose (3) is fixed on the inner side of the front end face of the ejector shell (2) and communicated with the working fluid inlet pipe (1), and the working nozzle (4) is connected with the rear end of the hose (3);
the adjusting mechanism comprises a sealing installation shell (12), a driving motor (10) and a push rod (11), wherein the sealing installation shell (12) is fixedly installed on one side of the ejector shell (2), the driving motor (10) is fixedly installed in the sealing installation shell (12), an output shaft of the driving motor (10) is connected with the push rod (11), and the lower end of the push rod (11) is fixed to the outer side of the working nozzle (4).
2. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as claimed in claim 1, wherein: the working fluid inlet pipe (1), the hose (3) and the working nozzle (4) are collinear in axis when not in work.
3. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as set forth in claim 1, wherein: the driving motor (10) is a miniature servo motor and is connected with the control system through a control line.
4. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as claimed in claim 1, wherein: the push rod (11) is a solid rod.
5. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as claimed in claim 1, wherein: the axial angle change range of the working nozzle (4) during working is-5 degrees.
6. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as claimed in claim 1, wherein: the adjusting mechanism is arranged on the upper side of the ejector shell (2), and the ejection fluid inlet pipe (5) is arranged on the lower side of the ejector shell (2).
7. The hydrogen ejector capable of precisely adjusting the circulation system of the fuel cell as set forth in claim 1, wherein: the hose (3) is a high-pressure hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210911010.5A CN115224300A (en) | 2022-07-29 | 2022-07-29 | Hydrogen ejector capable of accurately adjusting fuel cell circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210911010.5A CN115224300A (en) | 2022-07-29 | 2022-07-29 | Hydrogen ejector capable of accurately adjusting fuel cell circulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115224300A true CN115224300A (en) | 2022-10-21 |
Family
ID=83615363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210911010.5A Pending CN115224300A (en) | 2022-07-29 | 2022-07-29 | Hydrogen ejector capable of accurately adjusting fuel cell circulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115224300A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94037902A (en) * | 1994-09-22 | 1996-07-10 | Челябинский государственный технический университет | Liquid-and-gas ejector |
| US6364626B1 (en) * | 1998-02-05 | 2002-04-02 | Evgueni D. Petroukhine | Liquid-gas jet apparatus |
| CN101876329A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Injection pump with variable nozzle |
| CN102102922A (en) * | 2010-12-15 | 2011-06-22 | 大连海事大学 | Ejector for ejecting type refrigerating system |
| WO2017186377A1 (en) * | 2016-04-29 | 2017-11-02 | Robert Bosch Gmbh | Suction jet pump |
| CN107725494A (en) * | 2017-10-30 | 2018-02-23 | 上海新源动力有限公司 | A kind of fuel battery engine system adjustable aperture and nozzle away from injector |
| CN111664129A (en) * | 2020-06-15 | 2020-09-15 | 昆山巨元升机械设计有限公司 | Polluted gas discharge device |
| CN112901566A (en) * | 2021-03-30 | 2021-06-04 | 上海羿沣氢能科技有限公司 | Fuel cell ejector with adjustable working nozzle |
| CN113302402A (en) * | 2019-01-18 | 2021-08-24 | 罗伯特·博世有限公司 | Jet pump unit for controlling a gaseous medium |
-
2022
- 2022-07-29 CN CN202210911010.5A patent/CN115224300A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94037902A (en) * | 1994-09-22 | 1996-07-10 | Челябинский государственный технический университет | Liquid-and-gas ejector |
| US6364626B1 (en) * | 1998-02-05 | 2002-04-02 | Evgueni D. Petroukhine | Liquid-gas jet apparatus |
| CN101876329A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Injection pump with variable nozzle |
| CN102102922A (en) * | 2010-12-15 | 2011-06-22 | 大连海事大学 | Ejector for ejecting type refrigerating system |
| WO2017186377A1 (en) * | 2016-04-29 | 2017-11-02 | Robert Bosch Gmbh | Suction jet pump |
| CN107725494A (en) * | 2017-10-30 | 2018-02-23 | 上海新源动力有限公司 | A kind of fuel battery engine system adjustable aperture and nozzle away from injector |
| CN113302402A (en) * | 2019-01-18 | 2021-08-24 | 罗伯特·博世有限公司 | Jet pump unit for controlling a gaseous medium |
| CN111664129A (en) * | 2020-06-15 | 2020-09-15 | 昆山巨元升机械设计有限公司 | Polluted gas discharge device |
| CN112901566A (en) * | 2021-03-30 | 2021-06-04 | 上海羿沣氢能科技有限公司 | Fuel cell ejector with adjustable working nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 董景明;王威宁;郭阳;邓洋波;苏风民;: "热力压缩海水淡化系统中低温蒸汽喷射器的实验研究", 科学技术与工程, no. 16, 8 June 2018 (2018-06-08) * |
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