CN101705884B - Equipment for calibrating flow rate characteristic of fuel gas nozzle - Google Patents
Equipment for calibrating flow rate characteristic of fuel gas nozzle Download PDFInfo
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- CN101705884B CN101705884B CN2009102374446A CN200910237444A CN101705884B CN 101705884 B CN101705884 B CN 101705884B CN 2009102374446 A CN2009102374446 A CN 2009102374446A CN 200910237444 A CN200910237444 A CN 200910237444A CN 101705884 B CN101705884 B CN 101705884B
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention relates to equipment for calibrating the flow rate characteristic of a fuel gas nozzle, which comprises a fuel gas source 1 for supplying a fuel gas, a depressurizing device 2 for depressurizing the fuel gas from the fuel gas source 1, a pressure stabilizing device 3 for stabilizing the pressure of the fuel gas from the depressurizing device, a gas collecting device 10 for collecting and measuring the volume of fuel gas injected by a nozzle 8 to be calibrated, pressure testing devices 4a and 4b for testing pressures before and after the nozzle and a control system, wherein the control system comprises a flow rate calibrating device for calibrating the variation characteristic of the flow rate of the nozzle with ejection duration and ejection pressure; and the control system is used for determining the characteristics of the driving current of the nozzle and determining the driving current suitable for the fuel gas nozzle according to the response characteristic of an electromagnetic valve of the nozzle. The equipment can calibrate the flow rate characteristics of different fuel gas nozzles, determine the optimal working areas of the fuel gas nozzles, optimize the driving characteristics of the fuel gas nozzles and provide an accurate basis for the model selection and application of the fuel gas nozzles.
Description
Technical field
The present invention relates to a kind of equipment that is used to demarcate the Flow characteristics of gas nozzle, especially for the equipment of the Flow characteristics of demarcating the hydrogen nozzle.
Background technique
Along with petering out of petroleum-based energy, existing energy resource structure is faced with basic change.Because the energy-consuming of present automobile accounts for the world energy sources total quantity consumed and reached 1/4th, the quantity of following automobile still can continue to increase, and makes substitute fuel more and more cause people's attention; Be that gasoline and the diesel oil that raw material makes can produce CO, HC and CO in addition with the oil when burning
2, environment for human survival is caused very big harm, these have all further promoted the development and utilization of substitute fuel.Gaseous fuel such as compressed natural gas CNG, LNG Liquefied natural gas LND, LPG LPG, hydrogen H
2Deng because its physics, chemical characteristics can effectively improve the weakness that petroleum-based energy is difficult to overcome, be widely used in internal-combustion engine, generator set equal energy source power plant at car and boat.
Gas fuel nozzle is as the critical component of gaseous fuel energy source and power device; Its Flow characteristics to the influence of energy source and power device performance significantly; Especially to requiring mixture strength to have a wide reach, and the accurate power plant of control gaseous fuel feed, need clear and definite different hydrogen supply pressure, corresponding hydrogen injection amount of different spray hydrogen duration like hydrogen-fueled internal combustion engine etc.; Guaranteeing that supply of fuel is accurately reasonable under the full operating mode, thereby realize accurate control to hydrogen-fueled internal combustion engine.
Can know according to the gas fuel nozzle Flow characteristics, when less than a certain injection duration t
0The time nozzle flow unstable (as shown in Figure 1), cause and can't accurately control the short corresponding down gas flow of duration that sprays in its using process, cause system works unstable.Yet the less and imperfection of at present the gas nozzle flow being measured of device can not accurately be measured nozzle at the short gas flow that sprays correspondence under the duration, and the flow that has limited gas nozzle utilizes scope, causes the wasting of resources to a certain extent.The exploitation of the testing apparatus of In view of the foregoing, demarcating for the gas fuel nozzle Flow characteristics has crucial meaning.Therefore the present invention proposes a kind of equipment that is used to demarcate the hydrogen nozzle flow characteristic; The hydrogen nozzle flow characteristic is demarcated and definite its optimum working zone comprehensively; Realization is to the accurate control of hydrogen internal combustion engine supply of fuel; Thereby, has great use value for the type selecting of hydrogen nozzle and application provide foundation accurately.
Summary of the invention
The objective of the invention is to propose a kind of equipment that is used for calibrating flow rate characteristic of fuel gas nozzle, especially for the equipment of the Flow characteristics of demarcating the hydrogen nozzle.This device can be set gas nozzle injecting times and corresponding the injection duration; Demarcate nozzle flow characteristic comprehensively; Demarcate nozzle flow characteristic comprehensively and confirm its optimum working zone; Simultaneously can realize drive circuit, program are optimized design, obtain being fit to the optimum drive current of this gas nozzle, make nozzle keep optimum Working.
In order to realize the object of the invention, the present invention proposes a kind of equipment that is used for calibrating flow rate characteristic of fuel gas nozzle, especially for the equipment of the Flow characteristics of demarcating the hydrogen nozzle.Said device comprises: the fuel gas source that is used to provide combustion gas; Be used for the decompressor that reduces pressure to from the combustion gas of fuel gas source; Be used for carry out the stable-pressure device of voltage stabilizing from the combustion gas of decompressor; Be used for carry out first pressure-detecting device of Pressure testing from the combustion gas of stable-pressure device; Be used for the gas-collecting device with cubing is collected in the combustion gas that is gone out by nozzle ejection to be calibrated; Be used for the combustion gas in the gas-collecting device is carried out second pressure-detecting device of Pressure testing; And control system, said control system comprises: the Flow characteristics calibrating device, and the flow that is used to demarcate nozzle is with the variation characteristic that sprays duration and jet pressure; And the nozzle driving current confirms device, is used for confirming the driving current characteristic of nozzle and confirms to be fit to the driving current of this gas nozzle based on the response characteristic of nozzle solenoid valve, makes nozzle keep optimum Working.The present invention can carry out the demarcation of Flow characteristics to various gas nozzle, confirms that its optimum working zone optimizes its drive performance simultaneously, for the type selecting and the application of gas nozzle provides foundation accurately.
Preferably; Said Flow characteristics calibrating device is an electronic control unit; Said electronic control unit can be set the injecting times of gas nozzle and reach the corresponding injection duration, and said nozzle driving current confirms that device comprises the electric current clamp, is used to detect the nozzle driving current.
Preferably, said fuel gas injection device comprise with said regulator through pipeline combustion gas pressure stabilizing cavity that links to each other and the gas nozzle that links to each other with the combustion gas pressure stabilizing cavity, be used for the combustion gas of pressure stabilizing cavity is ejected in the gas combustion apparatus under target injection pressure.
Preferably, said flow detector comprises the gas flow sensor that is installed in behind the stable-pressure device, is used for verifying demarcating the nozzle flow of measuring, and is used for the device gas flow sensor demarcated according to the flow coefficient of said nozzle.
Preferably, said first and second pressure-detecting devices are transient pressure sensors, and said equipment also comprises data acquisition unit, is used to gather the signal of transient pressure sensor, and show and analyze the Combustion tester of relevant pressure signal; And said Flow characteristics calibrating device obtains the flow coefficient of nozzle under the different condition based on the nozzle flow characteristic data of nozzle geometry structure size of demarcating and demarcation.
Preferably, said fuel gas source comprises high-pressure gas cylinder, and said decompressor comprises the combustion gas reduction valve, and said stable-pressure device comprises pressure stabilizing cavity.
Preferably, said Flow characteristics calibrating device is according to nozzle permissible working pressure scope, and selected a certain target injection pressure and injecting times change and spray the duration, demarcate the Flow characteristics of nozzle under this fuel-supplying pressure; Change target injection pressure, repeat above-mentioned calibration process, thereby can obtain nozzle flow characteristic under the different fuel supply pressure.
Preferably; Said may command system also comprises computer, and in calibration process, computer real-time is fuel gas injection target pressure value and checkout value relatively; The Signal Regulation of output revision directive in time combustion gas reduction valve is realized the closed loop control to gaseous-pressure, keeps constant to guarantee fuel gas injection pressure.
Description of drawings
Fig. 1 shown gas nozzle spray the duration during less than t0 sometime nozzle flow unstable, flow is measured accurately when therefore being necessary nozzle worked under little pulsewidth.
Fig. 2 has shown that nozzle flow can know that with the Changing Pattern of pulsewidth hydrogen supply pressure increases nozzle flow and increases gradually with pulsewidth under different hydrogen supply pressure (increasing to a6 by a1).
Fig. 3 has shown the different spray hydrogen durations (increasing to a3 by a1), and nozzle flow can know that with the Changing Pattern of hydrogen supply pressure the spray hydrogen duration increases nozzle flow and increases gradually with hydrogen supply pressure.
Fig. 4 has shown that the nozzle upstream and downstream are the Changing Pattern of hydrogen pressure stabilizing cavity and gas-collecting device internal pressure in the course of experimental work, and the pressure oscillation cycle is identical with the nozzle ejection frequency.
Fig. 5 has shown through drive circuit, program being optimized design, a that obtains, b, c, four kinds of different gas nozzle driving current characteristics of d.
Fig. 6 has shown the equipment of hydrogen nozzle flow characteristic.
Fig. 7 has shown the functional block diagram of hydrogen nozzle flow characteristic calibration facility.
Embodiment
Accompanying drawing 6; 7 have shown test system and the functional block diagram that is used to demarcate the hydrogen nozzle flow characteristic according to an embodiment of the invention; This system comprises the hydrogen source 1 of storing hydrogen; High pressure hydrogen from sources of hydrogen 1 gets into hydrogen pressure stabilizing cavity 3 through reduction valve 2 decompression backs, and the low pressure hydrogen that flows out from the hydrogen pressure stabilizing cavity finally arrives hydrogen nozzle 8 front ends through the hydrogen flowing quantity sensor.Pressure testing and data acquisition unit utilize pressure transducer 4a that the Hydrogen Vapor Pressure value of pressure stabilizing cavity is presented on the oscillograph; Computer 13 compares hydrogen injection target pressure value and checkout value in real time in the calibration process, in time exports revision directive Signal Regulation hydrogen reduction valve and realizes the closed loop control to Hydrogen Vapor Pressure.System also comprises the gas-collecting device 10 of the gas that is gone out by nozzle ejection being collected and carrying out cubing; Utilize the pressure transducer 4b that settles in the gas-collecting device 10 that the nozzle back pressure is presented on the oscillograph simultaneously, be used to analyze its influence nozzle flow characteristic.Said system comprises that also controlling this gas nozzle to be calibrated demarcates the control unit 5 of test; This control unit can be set hydrogen nozzle ejection number of times and corresponding the injection duration; Demarcate nozzle flow characteristic comprehensively; Utilize electric current clamp 7 to detect the nozzle driving current simultaneously, drive circuit, program are optimized design, can obtain being fit to the optimum drive current of this gas nozzle through the response characteristic of analyzing the nozzle solenoid valve; Make nozzle keep optimum Working; Different driving current characteristics curve as shown in Figure 5: curve a, b represent to drive nozzle firing current peak value and make and keep nozzle opening state current amplitude identical, curve a than curve b in nozzle open, current-responsive rapid speed when closing; Curve c representes to keep nozzle opening state current amplitude less than the firing current peak value, realizes that big electric current guarantees that nozzle in time opens, and little electric current is kept opening state; Curve d representes that driving current does not have the maintenance process, and current forms is simple, only has to increase and reduce process.In addition, this system comprises that also provides the pipeline from hydrogen source 1 to hydrogen nozzle 8.
The whole system operation process is: at first according to nozzle permissible working pressure scope; Selected a certain target injection pressure; Regulate hydrogen reduction valve 2 by computer 13 output control command signal Hydrogen Vapor Pressure in the pressure stabilizing cavity 3 is transferred to desired value; Utilize the pressure transducer 4a that settles behind the pressure stabilizing cavity to detect Hydrogen Vapor Pressure simultaneously, show and be recorded in (oscillograph) on the Combustion tester, relatively hydrogen injection target pressure value and checkout value of computer real-time in the experimentation; The Signal Regulation of output revision directive in time hydrogen reduction valve is realized the closed loop control to Hydrogen Vapor Pressure, and Hydrogen Vapor Pressure is kept constant behind the assurance reduction valve; Utilize the gas flow sensor of settling behind the pressure stabilizing cavity to detect hydrogen flowing quantity, be used to verify the precision of gas nozzle flow device.Utilize computer to pass through injecting times and corresponding the injection duration that electronic control unit 5 is set gas nozzle then; Start injection button; Hydrogen promptly gets into gas-collecting device 10 through gas nozzle and isopyknic water is expelled in the tank 11; Gas-collecting device 10 is collected and is measured the hydrogen volume that nozzle ejection goes out, thereby can obtain this jet pressure, corresponding hydrogen flowing quantity of injection duration, and opening bleed valve 9 can be with hydrogen by discharging in the gas-collecting device.Change and spray the duration and then obtain the hydrogen nozzle flow characteristic under this target injection pressure.Change target injection pressure; Repeat above-mentioned calibration process; Thereby can obtain fixedly hydrogen supply pressure, nozzle flow characteristic is with Changing Pattern (as shown in Figure 2) that sprays the duration and fixing the injection duration, and nozzle flow characteristic is with the Changing Pattern (as shown in Figure 3) of hydrogen supply pressure.Can discharge through discharging valve 12 during hypervolia in the tank.
Since flow rate characteristic of fuel gas nozzle only with the valve port orifice size; Upstream and downstream pressure ratio and flow coefficient are relevant; Transient pressure sensor 4a and the detected upstream and downstream pressure of 4b (as shown in Figure 4) settled through the nozzle front end and back end can calculate pressure ratio; Therefore analysis through to the nozzle arrangements size can be calculated the valve port orifice size, utilizes the nozzle flow characteristic data of experimental calibration can find the solution the flow coefficient of nozzle under the different condition.Because gas flow sensor is in tested gas flow hour precise decreasing; Can not accurately measure corresponding gas flow; Utilize the flow coefficient of gained under the above-mentioned condition can instead ask the gas flow of the nozzle of flowing through; As shown in Figure 6, computer 13 change according to pressure, valve port area before and after the nozzle and the flow coefficient calculated flow of above-mentioned gained through the gas flow of nozzle, provide the correction factor under the different condition; Thereby effectively revised the precision of gas flow sensor when measuring less gas flow, expanded the accurate flux test scope of gas flow sensor.
The invention has the advantages that: can realize the target injection pressure that gas nozzle is accurate, stable through Hydrogen Vapor Pressure controlling device and detection system; Can set the injecting times and corresponding the injection duration of hydrogen nozzle through the Flow characteristics calibrating device; Demarcate nozzle flow characteristic comprehensively and confirm its optimum working zone; Utilize the electric current clamp to detect and recording nozzles driving current characteristic simultaneously; Through to the analysis of driving current signal and the optimal design of software and hardware, can obtain nozzle optimum drive current characteristic and make nozzle obtain optimum Working.The present invention can carry out the demarcation of Flow characteristics to various gas nozzle, optimizes the driving current characteristic and confirms its optimum working zone, for the type selecting and the application of gas nozzle provides foundation accurately.
Although described the present invention in conjunction with above-mentioned preferred embodiment; But will be appreciated that; The present invention is not limited to disclosed hydrogen nozzle flow characteristic equipment example, and the present invention can also cover various improvement and fall into the spirit of requirement protection of the present invention and the equivalent arrangements of scope interior (compressed natural gas CNG, LNG Liquefied natural gas LND, LPG LPG nozzle flow characteristic equipment etc.).
Description of reference numerals:
1. high-pressure gas cylinder, 2. hydrogen reduction valve, 3. hydrogen pressure stabilizing cavity, 4a. transient pressure sensor; 4b. transient pressure sensor, 5. electronic control unit, 6. Data Detection and collecting unit, 7. electric current clamp; 8. hydrogen nozzle, 9. bleed valve, 10. gas-collecting device; 11. tank, 12. discharging valves, 13. computers.
Claims (8)
1. equipment that is used to demarcate the Flow characteristics of gas nozzle, said equipment comprises:
Be used to provide the fuel gas source of combustion gas;
Be used for the decompressor that reduces pressure to from the combustion gas of fuel gas source;
Be used for carry out the stable-pressure device of voltage stabilizing from the combustion gas of decompressor;
Be used for carry out first pressure-detecting device of Pressure testing from the combustion gas of stable-pressure device;
Be used for the gas-collecting device with cubing is collected in the combustion gas that is gone out by nozzle ejection to be calibrated;
Be used for the combustion gas in the gas-collecting device is carried out second pressure-detecting device of Pressure testing; And control system, said control system comprises: control unit is used to set the number of times and corresponding the injection duration of gas nozzle; And
The electric current clamp are used to detect the nozzle driving current.
2. equipment according to claim 1 is characterized in that, said decompressor, combustion gas pressure stabilizing cavity link to each other through the pipeline order with gas nozzle, can the combustion gas in the pressure stabilizing cavity be ejected in the gas-collecting device under target injection pressure.
3. equipment according to claim 1; It is characterized in that said first and second pressure-detecting devices are transient pressure sensors, said equipment also comprises data acquisition unit; Be used to gather the signal of transient pressure sensor, and show and analyze the Combustion tester of relevant pressure signal.
4. equipment according to claim 1; It is characterized in that; Said equipment also comprises and being used for carry out the flow detector of flow detection from the combustion gas of stable-pressure device; Said flow detector comprises the gas flow sensor that is installed in behind the stable-pressure device, is used for verifying demarcating the nozzle flow of measuring.
5. equipment according to claim 1 is characterized in that said fuel gas source comprises high-pressure gas cylinder, and said decompressor comprises the combustion gas reduction valve, and said stable-pressure device comprises pressure stabilizing cavity.
6. equipment according to claim 1 is characterized in that, according to nozzle permissible working pressure scope, selected a certain target injection pressure and respective spray number of times change and spray the duration, demarcate the Flow characteristics of nozzle under this fuel-supplying pressure; Change target injection pressure, repeat above-mentioned calibration process, can obtain the Flow characteristics of nozzle under the different fuel supply pressure.
7. equipment according to claim 1; It is characterized in that; Said control system also comprises computer, and in calibration process, computer real-time is fuel gas injection target pressure value and checkout value relatively; The Signal Regulation of output revision directive in time combustion gas reduction valve is realized the closed loop control to gaseous-pressure, keeps constant to guarantee fuel gas injection pressure.
8. equipment according to claim 1 is characterized in that, said combustion gas is hydrogen, compressed natural gas, LNG Liquefied natural gas or LPG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102374446A CN101705884B (en) | 2009-11-06 | 2009-11-06 | Equipment for calibrating flow rate characteristic of fuel gas nozzle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102374446A CN101705884B (en) | 2009-11-06 | 2009-11-06 | Equipment for calibrating flow rate characteristic of fuel gas nozzle |
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| CN101705884A CN101705884A (en) | 2010-05-12 |
| CN101705884B true CN101705884B (en) | 2012-07-04 |
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| CN2009102374446A Expired - Fee Related CN101705884B (en) | 2009-11-06 | 2009-11-06 | Equipment for calibrating flow rate characteristic of fuel gas nozzle |
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| CN102507232B (en) * | 2011-10-14 | 2014-09-10 | 华南理工大学 | Intelligentized calibration device and method for nozzle |
| CN103364661A (en) * | 2013-07-09 | 2013-10-23 | 镇江恒驰科技有限公司 | Device for testing performance of natural gas injection electromagnetic valve and testing method of device |
| ITRM20130653A1 (en) * | 2013-11-26 | 2015-05-27 | A N D Holding Ltd | CONTROLLED AND INSTANTANEOUS PRODUCTION SYSTEM OF HYDROGEN TO BE INPUT IN THE SUCTION DUCT OF AN ENDOTHERMAL ENGINE |
| CN104677468B (en) * | 2013-11-29 | 2018-01-16 | 清华大学 | Verify the device and method of sonic nozzle |
| CN105863920B (en) * | 2016-03-31 | 2018-06-26 | 江苏大学 | A kind of high-pressure natural gas injector caliberating device and its method |
| CN106762309B (en) * | 2016-12-20 | 2019-01-04 | 西华大学 | Gas interrupted injection measuring device and gas interrupted injection system for measuring quantity |
| CN107218139B (en) * | 2017-07-21 | 2020-04-14 | 中国第一汽车股份有限公司 | Online detection method for drift amount of flow characteristic of gas nozzle |
| CN107402125B (en) * | 2017-07-21 | 2019-07-12 | 中国第一汽车股份有限公司 | The online test method of natural gas engine gas nozzle clamping stagnation |
| CN108760368B (en) * | 2018-05-30 | 2020-05-19 | 内蒙古科技大学 | Method for judging typical operating conditions of aerosol nozzle |
| CN109186981A (en) * | 2018-09-18 | 2019-01-11 | 上海工程技术大学 | A kind of high-power nozzle group valve discharge characteristic is test bed |
| CN109357885A (en) * | 2018-11-02 | 2019-02-19 | 天津航宇卓然科技有限公司 | A kind of discharge coefficient Intelligent Calibration system of multichannel nozzle |
| CN110646037B (en) * | 2019-11-22 | 2020-04-10 | 潍柴动力股份有限公司 | Gas nozzle flow calibration method and device |
| CN111076923B (en) * | 2019-12-18 | 2021-07-20 | 西安航天动力研究所 | Continuous flow calibration system and method for high-temperature gas regulator |
| CN113217200B (en) * | 2021-05-28 | 2022-02-11 | 北京理工大学 | Hydrogen injection testing device and method for direct-injection hydrogen internal combustion engine |
| CN116335818A (en) * | 2023-01-02 | 2023-06-27 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
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