CN116857241A - Ejector for hydrogen circulation system of hydrogen fuel cell - Google Patents
Ejector for hydrogen circulation system of hydrogen fuel cell Download PDFInfo
- Publication number
- CN116857241A CN116857241A CN202310806800.1A CN202310806800A CN116857241A CN 116857241 A CN116857241 A CN 116857241A CN 202310806800 A CN202310806800 A CN 202310806800A CN 116857241 A CN116857241 A CN 116857241A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- nozzle needle
- side wall
- fuel cell
- hydrogen
- 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
- 239000001257 hydrogen Substances 0.000 title claims abstract description 70
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 70
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000000446 fuel Substances 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 31
- 230000006835 compression Effects 0.000 claims description 23
- 238000007906 compression Methods 0.000 claims description 23
- 230000008676 import Effects 0.000 claims 3
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 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
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/461—Adjustable nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
-
- 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
-
- 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 an ejector for a hydrogen circulation system of a hydrogen fuel cell, which comprises a shell, wherein a nozzle needle, a nozzle needle accurate sliding driving mechanism and a nozzle are arranged in the shell, the shell is divided into an ejection chamber, a mixing chamber and a diffusion chamber in the left-to-right direction, one end of the nozzle is arranged in the ejection chamber, the other end of the nozzle extends into the mixing chamber, a nozzle runner is arranged in the nozzle, the nozzle needle is slidably arranged in the nozzle runner, a high-pressure gas inlet is formed in the side wall of the shell, which is positioned in the ejection chamber, and is mutually communicated with the nozzle runner, and a low-pressure gas inlet is formed in the side wall of the shell, which is positioned in the mixing chamber. According to the invention, the accurate movement of the nozzle needle on the nozzle flow channel is accurately controlled by the accurate sliding driving mechanism of the nozzle needle according to the power of the hydrogen fuel cell, so that the continuous change of the variable flow channel diameter of the nozzle flow channel is realized, and the high-efficiency injection is realized.
Description
Technical Field
The invention relates to the field of hydrogen fuel cells, in particular to an ejector for a hydrogen circulation system of a hydrogen fuel cell.
Background
In the background of increasing energy demands worldwide, increasing environmental crisis and increasing population pressure, the novel clean energy utilization mode is more and more important. The hydrogen fuel cell has the advantages of high efficiency, zero pollution, low noise, quick start, long service life and the like, has wide development prospect, and is the development direction of the next generation of clean energy and vehicle power.
The hydrogen fuel cell directly converts chemical energy of hydrogen into electric energy through electrochemical reaction without combustion, so that the hydrogen fuel cell has the advantages of high efficiency, high power density, zero emission, low noise and the like, and is very suitable for being used as automobile power. In a hydrogen circulation system of a hydrogen fuel cell vehicle, a hydrogen circulation pump is generally used as a device for hydrogen circulation, but the hydrogen circulation pump has the disadvantages of difficult processing and manufacturing, high cost, poor reliability and additional power consumption and weight. The ejector has the outstanding advantages of simple structure, high reliability, low cost, no parasitic power consumption in the system, light weight and the like, and has the development trend of replacing a hydrogen circulating pump.
In practical application, the ejector performance of the ejector is evaluated as the ejector rate, which is the ratio of the mass flow of the secondary stream to the mass flow of the main stream. The load change interval of the vehicle-mounted fuel cell system is very wide and generally changes between 5% and 100% rated value, the traditional ejector cannot accurately adjust the caliber of the nozzle according to the change of the power of the fuel cell automobile, the working range of higher ejection rate can be kept narrower, the ejection rate of the fuel cell system is obviously reduced when the fuel cell works under low load, the system requirement is often not met, the existing ejector for the hydrogen fuel cell automobile system is improved in some ways, such as patent CN109873181, the nozzle of the ejector is designed into a plurality of circulation channels, and the circulation channels comprise a central circulation channel and at least one pair of circulation channels symmetrical with respect to the central circulation channel. When the fuel cell is regulated under different powers, the main flow hydrogen is supplied through the flow channels with different throat diameters to realize the aim of high-efficiency injection of the secondary flow hydrogen, but the mode is not accurate and continuous, so that an injector for a hydrogen circulation system of the hydrogen fuel cell, which can accurately and continuously change the nozzle diameter so as to improve the injection efficiency, needs to be provided.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides an ejector for a hydrogen circulation system of a hydrogen fuel cell.
The technical aim of the invention is realized by the following technical scheme:
the utility model provides an ejector for hydrogen fuel cell hydrogen circulation system, includes the casing, be equipped with nozzle needle, the accurate slip actuating mechanism of nozzle needle, nozzle in the casing, the casing divide into injection room, mixing chamber and diffusion chamber from left to right direction, nozzle one end is established in the injection room, and the other end extends to in the mixing chamber, be equipped with the nozzle runner in the nozzle, nozzle needle slidable mounting is in the nozzle runner, the casing is located high-pressure gas inlet has been seted up on the lateral wall of injection room, high-pressure gas inlet communicates with each other with the nozzle runner, the casing is located low-pressure gas inlet has been seted up on the lateral wall of mixing chamber, the accurate slip actuating mechanism control of nozzle needle the accurate slip of nozzle needle.
According to the invention, main flow hydrogen is conveyed to the injection chamber through the high-pressure gas inlet, the accurate sliding driving mechanism of the nozzle needle accurately controls the accurate movement of the nozzle needle on the nozzle flow channel according to the power of the hydrogen fuel cell, and the open duty ratio of the nozzle needle is controlled, so that the continuous change of the variable flow channel path of the nozzle flow channel is realized, the main flow hydrogen keeps flowing out from the outlet of the variable flow channel at a high speed, secondary fluid from the low-pressure gas inlet is sucked, the injection of the secondary flow is realized, and the high-efficiency injection rate is realized.
Meanwhile, the movement of the nozzle needle is controlled through the accurate sliding driving mechanism of the nozzle needle, and the flow flowing out of the reducing flow passage is controlled, so that the ratio of the secondary flow mass flow to the main flow mass flow is controlled, compared with the prior art, a proportional valve is not needed, the flow can be regulated, and the cost is greatly reduced.
The end of the nozzle needle facing the outlet end of the nozzle flow channel is a reducing section with a gradually reduced caliber, the outlet end of the nozzle flow channel is a reducing flow channel with a gradually reduced caliber, the changing trend of the reducing section is the same as the gradual changing trend of the reducing flow channel, the outlet diameter of the reducing flow channel can be continuously changed in the sliding process of the nozzle needle through the matching of the reducing flow channel and the reducing section,
meanwhile, the change trend of the reducing section is the same as the gradual change trend of the reducing flow channel, so that the nozzle needle is prevented from impacting the side wall of the reducing flow channel in the moving process.
Preferably, the accurate sliding driving mechanism of nozzle needle includes driving rack, driving gear, potentiometer, driven gear, driven rack, rotating electrical machines, the driving rack is fixed to be established on the lateral wall of nozzle needle initiating terminal, the driving rack is along the length direction setting of nozzle needle, the driving gear with driving rack intermeshing, the output of rotating electrical machines with the middle part fixed connection of driving gear, the motor end of rotating electrical machines is fixed on the lateral wall of casing, driven rack is established on the lateral wall of nozzle needle initiating terminal, driven rack is along the length direction setting of nozzle needle, driven rack with driving rack is located the opposite both sides of nozzle needle, driven gear with driven rack intermeshing, the knob of potentiometer is fixed in the middle part of driven gear, the potentiometer is fixed on the casing, and the rotation of motor is controlled through the controller, and this is the mature technology of current case, therefore does not carry out in this case.
According to the invention, the rotation of the motor is controlled by the controller, the motor controls the rotation of the driving gear, so that the left-right movement of the driving rack is controlled, the left-right movement of the nozzle needle is driven, the continuous change of the outlet diameter of the variable radial flow channel is realized, the nozzle needle moves and simultaneously drives the movement of the driven rack, so that the driven gear is driven to rotate, the driven gear rotates to drive the change of the potentiometer knob, the potentiometer conveys the rotation change of the gear to the controller, and the telescopic stroke of the nozzle needle is fed back, so that the movement of the nozzle needle is automatically and accurately controlled, the rotating motor is a speed reducing motor capable of rotating positively and negatively, the rotating speed of the rotating motor is reduced, the controller is guaranteed to have sufficient time to receive the feedback information of the potentiometer, and the control precision and accuracy are improved.
Preferably, a power-off disengaging mechanism is arranged between the rotating motor and the driving gear, the power-off disengaging mechanism comprises a rotating disk, a compression spring, an electromagnetic column and a guide column, an anti-disengaging block and a sucked block, the rotating disk is fixedly connected with the output end of the rotating motor, the rotating disk is arranged in parallel with the driving gear, the compression spring is arranged between the rotating disk and the driving gear, one end of the compression spring is fixedly connected with the rotating disk, the other end of the compression spring is fixedly connected with the driving gear, a through hole is formed in the middle of the driving gear, the guide column penetrates through the through hole, one end of the guide column is fixedly connected with the side wall of the shell, the other end of the guide column is fixedly connected with the anti-disengaging block, the electromagnetic column is arranged on one side, close to the driving gear, of the rotating disk is provided with a magnetic suction groove matched with the electromagnetic column, and the bottom of the magnetic suction groove is provided with the sucked block, and the sucked block can be iron.
Preferably, a pushing compression spring is arranged between the rear end of the nozzle needle and the shell.
According to the invention, through the outage disengaging mechanism, when the electromagnetic column is powered off suddenly, the compression spring ejects the driving gear, so that the driving gear is separated from the rack, and the gas at the high-pressure gas inlet can move with the nozzle needle to seal the nozzle opening, so that the problems that under high-power operation, high-pressure gas flow is continuously added into the hydrogen fuel cell and a proton exchange membrane is damaged when the power is suddenly cut off are solved.
According to the invention, the guide post enables the driving gear to be always kept on the same horizontal plane with the rotating disc when the driving gear is separated from the rotating disc by the elasticity of the compression spring, so that the next suction of the electromagnetic post and the sucked block is facilitated, and the driving gear is prevented from separating from the guide post by the anti-falling block.
Preferably, a sealing telescopic tube is arranged between the nozzle needle and the shell, the sealing telescopic tube is arranged at the rear of the injection chamber and positioned at the high-pressure gas inlet, the sealing telescopic tube comprises a hose with a wavy section, one end of the hose is fixedly connected with the side wall of the nozzle needle in a sealing way, the other end of the hose is fixedly connected with a fixing ring, and the side wall of the fixing ring is fixedly connected with the side wall of the shell in a sealing way.
According to the invention, the nozzle needle can move through the flexible pipe with the wavy section of the sealing flexible pipe, meanwhile, the sealing flexible pipe is used for sealing and fixing, the sealing performance is ensured while the nozzle needle can move, so that hydrogen can not enter the rear end of the sealing flexible pipe, the electric and mechanical parts are isolated, the electric parts are prevented from being broken down, if the sealing is not carried out, the hydrogen leakage is easy to cause, meanwhile, water vapor is generated during the system operation, and the problem of short circuit of the electric parts is easy to cause, and the sealing is increased, so that the use is safer.
Preferably, the nozzle needle and the nozzle flow channel are kept horizontal and positioned on the central axis of the nozzle flow channel, so that uniform jet of air flow can be ensured.
Preferably, the nozzle needle is provided with a first balance slide block positioned at the rear of the sealing telescopic pipe, and the tail end of the nozzle needle is provided with a second balance slide block.
According to the invention, through the design of the two balance sliding blocks, the nozzle needle is always balanced, and the nozzle needle is prevented from tilting and striking the side wall of the nozzle flow channel in the moving process.
The first balancing slide block and the second balancing slide block respectively comprise a slide block body fixedly connected with the side wall of the nozzle needle, the slide block bodies are fixedly connected with more than two slide blocks along the length direction, each slide block body is provided with a ball groove on the side wall, the ball grooves are embedded with balls, the balls can roll in the ball grooves, and the ball grooves are formed with more than three parts along the circumferential direction of the slide block body.
Preferably, the nozzle needle is provided with external threads corresponding to the outer side wall of the first balance slide block, and the slide block body is provided with internal threads matched with the external threads.
According to the invention, through the design of the external threads and the internal threads, the distance between the slider bodies of the first balance slider can be adjusted, and the position of the slider bodies on the nozzle needle can be finely adjusted according to actual conditions, so that the balance degree of the nozzle needle is maintained more accurately.
Preferably, the diffusion chamber is flared so that the mixed primary and secondary streams are capable of mixed diffusion.
Preferably, both sides of the driving rack are provided with limiting blocks, the limiting blocks are fixed on the side walls of the nozzle needle, and the problem that the driving gear is separated from the driving rack due to continuous rotation after the driving gear rotates to both sides of the driving rack can be prevented, and the second balance sliding block can be guaranteed to fall off from the sliding groove to deviate in the sliding direction of the nozzle needle.
In summary, the invention has the following beneficial effects:
1. according to the invention, main stream hydrogen is conveyed to the injection chamber through the high-pressure gas inlet, the accurate sliding driving mechanism of the nozzle needle accurately controls the accurate movement of the nozzle needle on the nozzle flow channel according to the power of the hydrogen fuel cell, and the opening degree of the nozzle needle is controlled, so that the continuous change of the variable flow channel path of the nozzle flow channel is realized, the main stream hydrogen keeps flowing out from the outlet of the variable flow channel at a high speed, secondary fluid from the low-pressure gas inlet is sucked, the injection of the secondary stream is realized, and the high-efficiency injection rate is realized.
2. According to the invention, the movement of the nozzle needle is controlled through the accurate sliding driving mechanism of the nozzle needle, and the flow of main flow hydrogen flowing out of the outlet of the reducing flow channel is controlled, so that the pressure of secondary flow is changed, compared with the traditional method, a proportional valve is not needed, the flow can be regulated, and the cost is greatly reduced.
3. According to the invention, the rotation of the motor is controlled by the controller, the rotation of the driving gear is controlled by the motor, so that the left-right movement of the driving rack is controlled, the left-right movement of the nozzle needle is driven, the continuous change of the outlet diameter of the variable flow channel is realized, the nozzle needle moves and simultaneously drives the movement of the driven rack, the driven gear is driven to rotate, the rotation of the driven gear drives the change of the potentiometer knob, the potentiometer conveys the rotation change of the gear to the controller, and the telescopic travel of the nozzle needle is fed back, so that the movement of the nozzle needle is automatically and accurately controlled.
4. According to the invention, through the outage disengaging mechanism, when the electromagnetic column is powered off suddenly, the compression spring ejects the driving gear to separate the driving gear from the rack, the compression spring is pushed to push the nozzle needle to move due to elasticity, and the nozzle needle is pushed by the assistance of high-pressure air flow to seal the outlet of the variable flow channel, so that the problems that under high-power operation, the high-pressure air flow is continuously added into the hydrogen fuel cell and the proton exchange membrane is damaged when the electromagnetic column is powered off suddenly are solved.
5. According to the invention, the nozzle needle can move through the flexible pipe with the wavy section of the sealing flexible pipe, and meanwhile, the sealing flexible pipe is used for sealing and fixing, so that the sealing performance is ensured while the nozzle needle can move, the hydrogen can not enter the rear end of the sealing flexible pipe, the electric and mechanical parts are isolated, the electric parts are prevented from being broken down, if the sealing is not performed, the hydrogen leakage is easy to occur, meanwhile, water vapor is generated during the system operation, the problem of short circuit of the electric parts is easy to occur, and the use safety of the ejector is influenced.
Drawings
FIG. 1 is a schematic cross-sectional view of an ejector of the present invention;
FIG. 2 is a schematic view showing the nozzle needle of the present invention in a retracted state;
FIG. 3 is a schematic perspective view of a first balancing slider of the present invention;
FIG. 4 is a schematic cross-sectional view of the nozzle needle precision slide drive mechanism of embodiment 1 of the present invention without the power-off disengagement mechanism;
FIG. 5 is a schematic cross-sectional view of a nozzle needle precision slide driving mechanism provided with a power-off disengaging mechanism according to embodiment 1 of the present invention;
FIG. 6 is an enlarged schematic view of the present invention at A of FIG. 5;
FIG. 7 is a schematic cross-sectional view of the power disconnect mechanism of the present invention after disconnecting the drive gear;
FIG. 8 is a schematic view of a magnetic attraction groove on a driving gear of the present invention.
Detailed Description
The following specific examples are intended to be illustrative of the invention and are not intended to be limiting, as modifications of the invention will be apparent to those skilled in the art upon reading the specification without inventive contribution thereto, and are intended to be protected by the patent law within the scope of the appended claims.
The invention is described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1-4, an ejector for a hydrogen circulation system of a hydrogen fuel cell comprises a shell 1, wherein a nozzle needle 2, a nozzle needle precise sliding driving mechanism 5 and a nozzle 6 are arranged in the shell, the shell 1 is divided into an ejection chamber 11, a mixing chamber 12 and a diffusion chamber 13 in the left-right direction, the diffusion chamber 13 is in a horn shape, one end of the nozzle 6 is arranged in the ejection chamber 11, the other end extends into the mixing chamber 12, a nozzle runner 90 is arranged in the nozzle 6, the nozzle needle 2 and the nozzle runner 90 are kept horizontal, the nozzle needle 2 is slidably arranged in the nozzle runner 90, a high-pressure gas inlet 110 is formed in the side wall of the ejection chamber 11, the high-pressure gas inlet 110 is mutually communicated with the nozzle runner 90, a low-pressure gas inlet 120 is formed in the side wall of the mixing chamber 12, the nozzle needle precise sliding driving mechanism 5 is controlled to precisely slide, the nozzle needle precise sliding driving mechanism 5 comprises a driving motor 51, a driven motor 52, a driven gear rack 53, a driven gear 54, a rack 55 and a rack 55 are rotatably arranged at the side wall of the driving motor 52, the driven gear 55 is rotatably arranged at the side wall 55 along the driving motor 52, the driving end of the driving gear 55 is fixedly arranged at the side wall 55, the driving end of the driven gear 52 is rotatably connected with the driven gear 55, the driving end of the driven gear 52 is rotatably arranged at the driving end 55, the driving end is fixedly arranged at the side wall of the driving end is rotatably arranged at the driving end of the driving end, and the driving end is fixedly connected with the driving end of the driving end is rotatably arranged at the driving end, and the driving end is provided with the driving gear 52, and is provided. The passive rack 55 and the active rack 51 are located at two opposite sides of the nozzle needle 2, the passive gear 54 is meshed with the passive rack 55, a knob of the potentiometer 53 is fixed at the middle of the passive gear, the potentiometer is fixed on the shell 1, one end of the nozzle needle 2, which faces to the outlet end of the nozzle flow channel 90, is a variable diameter section with a gradually reduced caliber, the outlet end of the nozzle flow channel 90 is a variable diameter channel with a gradually reduced caliber, the change trend of the variable diameter section is the same as the gradual change trend of the variable diameter flow channel, limiting blocks 520 are arranged at two sides of the active rack 51, and the limiting blocks 520 are fixed on the side wall of the nozzle needle 2.
As shown in fig. 2-3, a sealing extension tube 4 is disposed between the nozzle needle 2 and the housing, the sealing extension tube 4 is disposed in the injection chamber 11 and is located at the rear of the high pressure gas inlet 110, the sealing extension tube 4 includes a flexible tube 41 with a wavy section, one end of the flexible tube 41 is fixedly connected with a side wall of the nozzle needle 2 in a sealing manner, the other end of the flexible tube 41 is fixedly connected with a fixing ring 42, a side wall of the fixing ring 42 is fixedly connected with a side wall of the housing 1 in a sealing manner, a first balancing slider 21 is disposed at the rear of the sealing extension tube 4, a second balancing slider 22 is disposed at the end of the nozzle needle 2, the first balancing slider 21 and the second balancing slider 22 include slider bodies 221 fixedly connected with the side walls of the nozzle needle 2, the slider bodies 221 are fixedly connected with two or more along a length direction, ball grooves 222 are formed on the side walls of each slider body 221, balls 223 are embedded in the ball grooves 222, and a first balancing slider 21 and a second balancing slider 22 are disposed on the side wall of the slider bodies 20 along the three directions corresponding to the first balancing slider bodies 20.
Examples
Unlike embodiment 1, as shown in fig. 5-8, a power-off disengaging mechanism 7 is disposed between the rotating motor 56 and the driving gear 52, the power-off disengaging mechanism 7 includes a rotating disc 71, a compression spring 72, an electromagnetic column 73, a guide column 74, a release preventing block 75, and a sucked block 76, the rotating disc 71 is fixedly connected with the output end of the rotating motor 56, the rotating disc 71 is disposed parallel to the driving gear 52, the compression spring 72 is disposed between the rotating disc 71 and the driving gear 52, one end of the compression spring 72 is fixedly connected with the rotating disc 71, the other end of the compression spring 72 is fixedly connected with the driving gear 52, a through hole 511 is disposed in the middle of the driving gear 52, the guide column 74 penetrates through the through hole 511, one end of the guide column 74 is fixedly connected with the side wall of the housing 1, the other end of the electromagnetic column 73 is disposed on one side of the rotating disc 71 close to the driving gear 52, a magnetic suction groove 510 is disposed on the driving gear 52, and the suction groove 510 is disposed on the bottom of the suction groove 76.
As shown in fig. 1, a pushing compression spring 200 is disposed between the rear end of the nozzle needle 2 and the housing 1, when the nozzle needle accurate sliding driving mechanism 5 works under the power-off disengaging mechanism 7, the pushing compression spring 200 is in a compressed state, when the power-off disengaging mechanism 7 controls the driving gear 52 to disengage from the driving rack 51, the pushing compression spring 200 pushes the nozzle needle 2 to move due to elastic force, and meanwhile, the nozzle needle 2 is pushed by the assistance of high-pressure air flow to seal the outlet of the variable flow channel, so that the problem that the proton exchange membrane is damaged when the high-power operation is prevented and the power is suddenly interrupted, the high-pressure air flow is continuously added into the hydrogen fuel cell.
Meanwhile, after the valve for controlling the hydrogen is closed, when the vehicle is not horizontal, the nozzle needle 2 is subjected to elasticity and cannot move backwards, the outlet of the variable-diameter runner can be kept closed all the time, and residual hydrogen on the pipeline cannot flow out from the outlet of the variable-diameter runner.
Working principle: when the device is used, as shown in fig. 1-8, the controller controls the rotation of the motor 56 according to the power of the hydrogen fuel cell, the motor 56 controls the rotation of the driving gear 52, thereby controlling the left-right movement of the driving gear rack 52, thereby driving the nozzle needle 1 to move left and right, realizing the position to which the movement is required, simultaneously, the left-right movement of the nozzle needle 2 drives the movement of the driven gear rack 55, thereby driving the rotation of the driven gear 54, driving the change of the potentiometer knob, the potentiometer 53 changes the rotation of the gear, the gear is conveyed to the controller, the telescopic stroke of the nozzle needle 2 is fed back, then the main flow hydrogen entering from the high-pressure gas inlet 110 is low-speed high-pressure gas, the main flow is ejected from the variable flow channel through the nozzle channel, and forms high-speed air flow at the position of the nozzle outlet, the secondary flow enters from the low-pressure gas inlet 120, so that the secondary flow is sucked, the secondary flow is ejected, the two air flows are mixed in the mixing chamber 12, then the speed and the pressure are synchronously reduced, and finally the main flow flows out from the outlet into the fuel cell.
In the use process, the electromagnetic column 73 is electrified, the compression spring 72 compresses, the driving gear 52 is attracted with the rotating disc 71, so that the motor can drive the driving gear 52 to rotate, when the condition of sudden power failure is met, the electromagnetic column 73 is powered off, the compression spring 72 springs the driving gear 52 off, so that the driving gear 52 is separated from the rack, the compression spring 200 is pushed to push the nozzle needle 2 to move by elasticity, meanwhile, the outlet of the variable flow channel is closed by the auxiliary pushing of high-pressure air flow to the nozzle needle 2, and therefore the problem that the proton exchange membrane is damaged when the high-pressure air flow is continuously added into the hydrogen fuel cell under high-power operation and sudden power failure occurs is solved.
Claims (10)
1. The utility model provides an ejector for hydrogen fuel cell hydrogen circulation system, its characterized in that, including casing (1), be equipped with nozzle needle (2), nozzle needle accurate slip actuating mechanism (5), nozzle (6) in the casing, casing (1) divide into injection room (11), mixing chamber (12) and diffusion chamber (13) from left to right direction, nozzle (6) one end is established in injection room (11), and the other end extends to in mixing chamber (12), be equipped with nozzle runner (90) in nozzle (6), nozzle needle (2) slidable mounting is in nozzle runner (90), casing (1) are located offer high-pressure gas import (110) on the lateral wall of injection room (11), high-pressure gas import (110) are linked together with nozzle runner (90), casing (1) are located offer low-pressure gas import (120) on the lateral wall of mixing chamber (12), nozzle needle accurate slip actuating mechanism (5) control nozzle needle (2) are accurate.
2. The injector for the hydrogen circulation system of the hydrogen fuel cell according to claim 1, wherein the nozzle needle accurate sliding driving mechanism (5) comprises a driving rack (51), a driving gear (52), a potentiometer (53), a driven gear (54), a driven rack (55) and a rotating motor (56), the driving rack (51) is fixedly arranged on the side wall of the starting end of the nozzle needle (2), the driving rack (52) is arranged along the length direction of the nozzle needle (2), the driving gear (52) is meshed with the driving rack (51), the output end of the rotating motor (56) is fixedly connected with the middle part of the driving gear (52), the motor end of the rotating motor (56) is fixed on the side wall of the shell (1), the driven rack (55) is arranged on the side wall of the starting end of the nozzle needle (2), the driven rack (55) is arranged along the length direction of the starting end of the nozzle needle (2), the driven rack (55) is meshed with the driven rack (51) which is positioned on the two sides of the driven rack (55), and the electric potential of the driven rack (55) is fixed on the two sides of the shell (1).
3. The ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 2, wherein a power-off disengaging mechanism (7) is arranged between the rotating motor (56) and the driving gear (52), the power-off disengaging mechanism (7) comprises a rotating disc (71), a compression spring (72), an electromagnetic column (73), a guide column (74), a drop-off preventing block (75) and a sucked block (76), the rotating disc (71) is fixedly connected with the output end of the rotating motor (56), the rotating disc (71) is arranged in parallel with the driving gear (52), the compression spring (72) is arranged between the rotating disc (71) and the driving gear (52), one end of the compression spring (72) is fixedly connected with the rotating disc (71), the other end of the compression spring (72) is fixedly connected with the driving gear (52), a through hole (511) is formed in the middle of the driving gear (52), one end of the guide column (74) is fixedly connected with the side wall of the housing (1), the other end of the guide column (74) is fixedly connected with the side wall of the driving gear (75) near to the side wall of the driving gear (52), the driving gear (52) is provided with a magnetic attraction groove (510) which is matched with the electromagnetic column (73), and the bottom of the magnetic attraction groove (510) is provided with the attracted block (76).
4. The ejector for the hydrogen circulation system of the hydrogen fuel cell according to claim 2, wherein a sealing telescopic tube (4) is arranged between the nozzle needle (2) and the shell, the sealing telescopic tube (4) is arranged at the rear of the ejection chamber (11) and positioned at the high-pressure gas inlet (110), the sealing telescopic tube (4) comprises a flexible tube (41) with a wavy section, one end of the flexible tube (41) is fixedly connected with the side wall of the nozzle needle (2) in a sealing way, the other end of the flexible tube (41) is fixedly connected with a fixing ring (42), and the side wall of the fixing ring (42) is fixedly connected with the side wall of the shell (1) in a sealing way.
5. An ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 1, characterized in that the nozzle needle (2) is kept level with the nozzle flow channel (90).
6. An ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 5, characterized in that the nozzle needle (2) is provided with a first balancing slider (21) located behind the sealing bellows (4), the end of the nozzle needle (2) being provided with a second plate Heng Huakuai (22).
7. The ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 6, wherein the first balancing slider (21) and the second balancing slider (Heng Huakuai) each comprise a slider body (221) fixedly connected with the side wall of the nozzle needle (2), the slider bodies (221) are fixedly connected with more than two along the length direction, each side wall of the slider body (221) is provided with a ball groove (222), the ball grooves (222) are embedded with balls (223), the balls (223) can roll in the ball grooves (222), and the ball grooves (222) are formed with more than three along the circumferential direction of the slider bodies (221).
8. The ejector for the hydrogen circulation system of the hydrogen fuel cell according to claim 7, wherein the nozzle needle (2) is provided with external threads (20) on the outer side wall corresponding to the first balance slider (21), and the slider body (221) is provided with internal threads (220) which are mutually matched with the external threads (20).
9. An ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 1, wherein one end of the nozzle needle (2) toward the outlet end of the nozzle flow passage (90) is a diameter-changing section with a gradually decreasing diameter, the outlet end of the nozzle flow passage (90) is a diameter-changing flow passage with a gradually decreasing diameter, and the trend of the change of the diameter-changing section is the same as the trend of the gradual change of the diameter-changing flow passage.
10. The ejector for a hydrogen circulation system of a hydrogen fuel cell according to claim 1, wherein both sides of the driving rack (51) are provided with stoppers (520), and the stoppers (520) are fixed on the side wall of the nozzle needle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310806800.1A CN116857241A (en) | 2023-07-04 | 2023-07-04 | Ejector for hydrogen circulation system of hydrogen fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310806800.1A CN116857241A (en) | 2023-07-04 | 2023-07-04 | Ejector for hydrogen circulation system of hydrogen fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116857241A true CN116857241A (en) | 2023-10-10 |
Family
ID=88235199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310806800.1A Pending CN116857241A (en) | 2023-07-04 | 2023-07-04 | Ejector for hydrogen circulation system of hydrogen fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116857241A (en) |
-
2023
- 2023-07-04 CN CN202310806800.1A patent/CN116857241A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112780614B (en) | Hydrogen ejector for flow-adjustable fuel cell | |
| CN103843181A (en) | Fuel cell system comprising an ejector for recirculating off-gas from a stack | |
| JP2008190336A (en) | Ejector and fuel cell system provided therewith | |
| JP3995870B2 (en) | Fuel cell fluid supply device | |
| CN112058525A (en) | Nozzle with built-in rifling, ejector and fuel cell hydrogen circulation system | |
| CN110649284B (en) | Fuel cell system and vehicle with same | |
| CN111697254A (en) | Hydrogen circulation device system, regulation and control method thereof and fuel cell device system | |
| JP2012189103A (en) | Pilot type solenoid valve | |
| CN113471486A (en) | Integrated hydrogen circulating device for hydrogen fuel cell system | |
| CN220415845U (en) | Ejector | |
| CN113782773A (en) | Electromagnetic control valve-based variable flow type ejector for fuel cell | |
| CN116857241A (en) | Ejector for hydrogen circulation system of hydrogen fuel cell | |
| CN116123153A (en) | Two-stage jet device | |
| WO2007094131A1 (en) | Mixing pump and fuel cell | |
| CN114876887B (en) | Control valve, ejector, fuel cell system and vehicle | |
| CN214698531U (en) | Hydrogen ejector for fuel cell | |
| CN112268023A (en) | Flow control valve with integrated injection function | |
| CN114551930A (en) | Variable-flow gas mixing injection device, fuel cell system and method | |
| CN116428225A (en) | Double-stage ejector and fuel cell hybrid power system and control strategy thereof | |
| CN209586568U (en) | A kind of marine low-speed mechanical electronic hydraulic control oil inlet proportioning valve | |
| CN116480636B (en) | Two-stage jet device with flow guiding structure | |
| CN213839067U (en) | Flow control valve with integrated injection function | |
| CN112820903A (en) | Combined type large-flow hydrogen injection device and control method | |
| WO2022183323A1 (en) | Ejector for fuel cell and fuel cell | |
| CN115224300A (en) | Hydrogen ejector capable of accurately adjusting fuel cell circulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |