Gas injector performance testing device

Abstract

The application discloses a kind of gas injector performance detection devices, comprising: controllable gas source output module, pressure flow buffer module, flow detection and leakproofness detection module and control unit, controllable gas source output module is used to output 5~150bar gas source;Pressure flow buffer module is connected with controllable gas source output module, for guaranteeing the stability of system supply pressure and the followability of large flow output;Flow detection and leakproofness detection module are connected with pressure flow buffer module and adapter;Flow detection and leakproofness detection module are used for the flow and leakproofness test of gas injector under different pressures;When testing, the gas injector to be detected is loaded into adapter;Control unit is connected with the flow detection and leakproofness detection module, adapter gas injector to be detected control connection.The application can be flexibly switched in the flow and leakproofness test function of gas injector, simple structure, low cost, short construction period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas injector performance detection, and particularly to a gas injection performance detection device for gas passage injection or in-cylinder direct injection internal combustion engines and fuel cells. BACKGROUND

[0002] At present, fuel diversification and zero carbon emission are one of the important trends in the future, and also the only way for human beings to achieve sustainable development.

[0003] Promote the production and popularization of renewable fuels and biofuels represented by alcohol, ether, ammonia and hydrogen, and the substitution rate of low-carbon and carbon-neutral fuels reaches more than 10%. Establish a fuel modification technology system based on demand, and realize the development technology of fuel-engine collaborative optimization. Deeply optimize the efficiency of low-carbon and carbon-neutral fuel hybrid power systems, develop low-carbon and carbon-neutral fuel range extending technology, and develop low-carbon and carbon-neutral fuel dedicated range extender.

[0004] Among them, the use and exploration of low-carbon gas fuels represented by ammonia and hydrogen are being carried out on a large scale. The application of these fuels relies on the corresponding fuel injectors, and the performance detection of gas injectors needs to rely on special devices. How to economically and quickly obtain such detection devices is a difficult problem we need to solve!

[0005] Chinese patent application publication No. CN101705884A discloses a device for calibrating the flow characteristics of a gas injector, which comprises: a gas source for providing gas; a pressure reducing device for reducing the pressure of the gas from the gas source; a pressure stabilizing device for stabilizing the pressure of the gas from the pressure reducing device; a gas collecting device for collecting and volumetrically measuring the gas injected by the nozzle to be calibrated; a pressure detection device for detecting the pressure before and after the nozzle; and a control system, which comprises: a flow characteristic calibration device for calibrating the variation characteristics of the flow of the nozzle with the injection duration and the injection pressure; and a device for determining the driving current characteristics of the nozzle and determining the driving current suitable for the gas injector based on the response characteristics of the nozzle electromagnetic valve. The present application can calibrate the flow characteristics of various different gas injectors, determine their optimal working regions, optimize their driving characteristics, and provide accurate basis for the selection and application of gas injectors. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a low-cost, short-cycle and maintenance-free gas injector performance detection device, which is difficult to obtain by the existing gas injector detection device. The gas injector performance detection device can detect the flow characteristics and sealing performance of the gas injector under different pressures; it can also accurately revise the measurement results according to the monitored pressure and temperature parameters in the buffer module; the device has low manufacturing cost, short manufacturing cycle and simple maintenance.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A gas ejector performance testing device, comprising:

[0009] A controllable gas source output module is used to output a gas source of 5 to 150 bar;

[0010] A pressure and flow buffer module, the gas input end of which is connected to the gas output end of the controllable gas source output module, is used to ensure the stability of the system pressure supply and the responsiveness of large flow output.

[0011] A flow detection and sealing test module is provided, wherein the gas input terminal of the flow detection and sealing test module is connected to the gas output terminal of the pressure flow buffer module, and the gas output terminal of the flow detection and sealing test module is connected to the gas input terminal of the adapter; the flow detection and sealing test module is used to test the flow rate and sealing performance of the gas injector under different pressures; during the test, the gas injector to be tested is installed in the adapter;

[0012] A control unit is connected to the flow detection and sealing detection module and the adapter of the gas injector to be tested.

[0013] In a preferred embodiment of the present invention, a silencing device is further included, wherein the gas input end of the silencing device is connected to the gas output end of the gas injector to be tested.

[0014] In a preferred embodiment of the present invention, a liquid storage tank is further included, wherein the inlet of the liquid storage tank is connected to the outlet of the silencing device.

[0015] In a preferred embodiment of the present invention, the output module of the controllable gas source includes a gas storage tank, a first high-pressure gas pipe, and a pressure regulating valve. The gas outlet and gas return of the gas storage tank are connected to the gas input end and gas return end of the pressure-flow buffer module through the first high-pressure gas pipe. The pressure regulating valve is connected in series with the first high-pressure gas pipe to regulate the gas source pressure output by the gas storage tank.

[0016] In a preferred embodiment of the present invention, the pressure and flow buffer module includes a pressure regulator, a pressure monitor, a temperature monitor, and a data conversion and transmission unit. The gas input terminal of the pressure regulator is connected to the first high-pressure gas pipe. The data conversion and transmission unit is controlled and connected to the pressure regulator through the pressure monitor and the temperature monitor, and is also connected to the control unit.

[0017] In a preferred embodiment of the present application, the flow detection and sealing detection module comprises a main switch valve, a secondary switch valve, a first bypass valve, a second bypass valve, a main flow metering device and a bypass flow metering device, the gas input end of the main switch valve is connected with the gas output end of the pressure stabilizer through a second high-pressure gas pipe, the gas output end of the main switch valve is connected with the gas input end of the adapter through a third high-pressure gas pipe, the secondary switch valve and the main flow metering device are connected in series on the third high-pressure gas pipe, a bypass pipe is connected in parallel on the third high-pressure gas pipe, the first bypass valve, the second bypass valve and the bypass flow metering device are connected in series on the bypass pipe, wherein the bypass flow metering device is located between the first bypass valve and the second bypass valve; the main switch valve, the secondary switch valve, the first bypass valve, the second bypass valve, the adapter are connected with the control unit in control connection, and the main flow metering device and the bypass flow metering device are connected with the control unit in data connection.

[0018] In a preferred embodiment of the present application, the silencing device is connected with the gas output end of the adapter through an exhaust valve; the exhaust valve is connected with the control unit in control connection.

[0019] In a preferred embodiment of the present application, the main switch valve is selected as a normally closed valve, and the secondary switch valve is selected as a normally open valve, which are used for participating in the on-off control of the flow test path; the first bypass valve and the second bypass valve are both normally closed valves, which are used for participating in the on-off control of the sealing test path.

[0020] In a preferred embodiment of the present application, the exhaust valve is selected as a normally closed valve.

[0021] In a preferred embodiment of the present application, the control unit uses a 16-bit single-chip microcomputer, and outputs trigger instructions of the main switch valve, the secondary switch valve, the first bypass valve, the second bypass valve and the exhaust valve as well as the output of the drive waveform of the gas injector to be detected.

[0022] Due to the above technical scheme, the gas injector performance detection device can detect the flow characteristics and sealing performance of the gas injector under different pressures, and can accurately revise the measurement results according to the monitored pressure and temperature parameters in the buffer module. The device has low manufacturing cost, short manufacturing period and simple maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of the gas injector performance detection device of the present application. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings and embodiments, but the present application is not limited in the scope of the embodiments.

[0025] Referring toFigure 1 The gas injector performance detection device shown in the figure comprises a controllable gas source output module, a pressure flow buffer module, a flow and sealing performance detection module.

[0026] The controllable gas source output module is used to output a gas source with a pressure of 5-150 bar, and comprises a gas storage tank 110, a high-pressure gas pipe 120 (the aforementioned first high-pressure gas pipe), and a pressure regulating valve 130. The pressure regulating valve 130 is a manual pressure regulating valve or an electronic pressure regulating valve, and has a pressure regulating range of 2-180 bar and a regulating accuracy of 2 bar. The inner layer of the high-pressure gas pipe 120 is made of high-strength non-metallic material, and the outer layer is covered with a stainless steel woven mesh to improve the overall strength and hardness. The gas storage tank 110 is selected from a gas cylinder on the market that contains the corresponding test medium and has a cylinder pressure greater than 200 bar.

[0027] The gas outlet of the gas storage tank 110 filled with high-pressure test medium and the gas outlet are connected to the gas input end and the gas return end of the pressure stabilizer 140 of the pressure flow buffer module through the high-pressure gas pipe 120 with threads at both ends, and the sealing performance at the connection is ensured by using a ball head combined with a conical surface. The pressure regulating valve 130 is connected in series with the high-pressure gas pipe 120 to regulate the pressure of the gas source output by the gas storage tank.

[0028] The gas input end of the pressure flow buffer module is connected to the gas output end of the output module of the controllable gas source, which is used to ensure the stability of the system pressure and the followability of the large flow output. The gas input end of the pressure flow buffer module is connected to the gas output end of the controllable flow buffer module, which is used to ensure the stability of the system pressure and the followability of the large flow output; the pressure flow buffer module comprises a pressure stabilizer 140, a pressure monitor 150, a temperature monitor 170, and a data conversion and transmission unit 160. The pressure stabilizer 140 is selected from a stainless steel cylinder with a volume of 2-4 L. The pressure monitor 150 and the temperature monitor 170 are selected from high-frequency pressure sensors and high-frequency temperature sensors with data output. The data conversion and transmission unit 160 uses a PLC to convert and upload the data of the temperature and pressure sensors.

[0029] The gas input end and the gas return end of the pressure stabilizer 140 are connected to the high-pressure gas pipe 120. The pressure monitor 150 is installed on the pressure stabilizer 140 through pipe threads and a sealing gasket, and the temperature monitor is also installed on the pressure stabilizer 140 through pipe threads and a sealing gasket. The two are connected to the data conversion and transmission unit 160 through data lines, and the data conversion and transmission unit 160 is connected to the control unit 200.

[0030] The gas input end of the flow detection and sealing performance detection module is connected to the gas output end of the pressure flow buffer module, and the gas output end of the flow detection and sealing performance detection module is connected to the gas input end of the gas injector 300 to be detected. The flow detection and sealing performance detection module is used for flow and sealing performance testing of the gas injector at different pressures.

[0031] The flow detection and sealing detection module specifically comprises a main switch valve 180a, a secondary switch valve 180b, a bypass valve 250a (the aforementioned first bypass valve), a bypass valve 250b (the aforementioned second bypass valve), a main flow metering device 190a, and a bypass flow metering device 190b. The gas input end of the main switch valve 180a is connected with the gas output end of the pressure stabilizer 140 through a high-pressure gas pipe 120a (the aforementioned second high-pressure pipe), and the high-pressure gas pipe 120a is screwed and sealed between the gas input end of the main switch valve 180a and the gas output end of the pressure stabilizer 140. The inner layer of the high-pressure gas pipe 120a is made of high-strength non-metallic material, and the outer layer is covered with stainless steel woven mesh to improve the overall strength and hardness. The main switch valve 180a, the secondary switch valve 180b, the bypass valve 250a, and the bypass valve 250b are all high-pressure electromagnetic valves controlled by a relay. The main switch valve 180a is a normally closed valve, and the secondary switch valve 180b is a normally open valve, which are used for on-off control of the flow test path; the bypass valve 250a and the bypass valve 250b are both normally closed valves, which are used for on-off control of the sealing test path. The main flow metering device 190a and the bypass flow metering device 190b are both mass flow meters, and two types of metering devices with different ranges are matched according to needs, with a large range for detecting the flow of the measured object and a small range for detecting the sealing performance.

[0032] The gas output end of the main switch valve 180a is connected with the gas input end of the adapter 210 and the gas input end of the gas injector 300 to be detected through a high-pressure gas pipe 120b (the aforementioned third high-pressure gas pipe). The inner layer of the high-pressure gas pipe 120b is made of high-strength non-metallic material, and the outer layer is covered with stainless steel woven mesh to improve the overall strength and hardness. The gas output end of the main switch valve 180a and the high-pressure gas pipe 120b, the high-pressure gas pipe 120b and the adapter 210, and the adapter 210 and the gas injector 300 to be detected are all screwed and sealed.

[0033] The secondary switch valve 180b and the main flow metering device are connected in series on the high-pressure gas pipe 120b, and a bypass pipe 120c is connected in parallel on the high-pressure gas pipe 120b. The inner layer of the bypass pipe 120c is made of high-strength non-metallic material, and the outer layer is covered with stainless steel woven mesh to improve the overall strength and hardness.

[0034] The bypass valve 250a, the bypass valve 250b, and the bypass flow metering device 190b are connected in series on the bypass pipe 120c, and the bypass flow metering device 190c is located between the bypass valve 250a and the bypass valve 250b. The bypass valve 250a, the bypass valve 250b, and the bypass flow metering device 190b are all screwed and sealed with the bypass pipe 120c.

[0035] The main switch valve 180a, the auxiliary switch valve 180b, the bypass valve 250a, the bypass valve 250b and the control unit 200 are connected through a cable control connection, and the main flow metering device 190a and the bypass flow metering device 190b and the control unit are also connected through a cable data connection; the adapter 210 and the gas injector 300 to be detected are also connected through a cable data connection.

[0036] The control unit 200 uses a 16-bit single-chip microcomputer, and is connected with the sealing detection module and the gas injector 300 to be detected, and outputs trigger instructions to the main switch valve 180a, the auxiliary switch valve 180b, the bypass valve 250a, the bypass valve 250b and the driving waveform of the gas injector 300 to be detected.

[0037] The gas output end of the gas injector 300 to be detected and the adapter 210 are connected with the gas input end of the silencer 230 through an exhaust valve 220. The control unit 200 also outputs trigger instructions to the exhaust valve 220. The adapter 210 and the gas injector 300 to be detected are screwed with the exhaust valve 220 and the silencer 230 and are sealed by a sealing gasket. The exhaust valve 220 is a normally closed valve. The silencer 230 is a combination of a 6-10L stainless steel bottle and a silencer, and the number of silencers can be determined according to the maximum injection flow of the gas injector to be detected.

[0038] The liquid inlet of the liquid storage tank 240 is connected with the liquid outlet of the silencer 230, and the silencer 230 and the liquid storage tank 240 are screwed and sealed by a sealing gasket. The liquid storage tank 240 can be made of non-metallic or metallic materials according to the use environment and cost, and can assist in dissolving irritating gas to prevent the test medium from being directly discharged into the air.

[0039] The working principle of the gas injector performance detection device is as follows:

[0040] The gas injector 300 to be detected is installed in the corresponding adapter 210, the connection between the high-pressure connection pipe 120 and the adapter 210 is screwed, the connection of the measured member is prepared, and pure water or other medium is injected into the liquid storage tank 240.

[0041] Adjust the main switch valve 180a to the closed state using the button on the control unit 200; set the pressure according to the pressure requirement of the gas injector 300 to be tested using the pressure regulating valve 130, wait 10 seconds, and then let the test medium flow from the gas storage tank 110 into the pressure regulator 140 until it stabilizes; confirm the feedback parameters of the pressure monitor 150 and temperature monitor 170 in the data conversion and transmission unit 160; rotate the button corresponding to the exhaust valve 220 in the control unit 200 to open it; start the power-on button of the gas injector 300 to drive it, so that the gas injector 300 to be tested can start working. The measurement time and the power-on pulse width and frequency of the gas injector 300 to be tested are all set in the PLC in the control unit 200; During the operation of the gas injector 300, the real-time flow rate will be synchronously displayed on the main flow metering device 190a. After the test time ends, the average flow rate over a period of time will also be displayed on the main flow metering device 190a. Press the power-off button in the control unit 200 to drive the gas injector 300 under test, and observe the bubbling in the liquid storage tank 240. If bubbles emerge, activate the power-on buttons corresponding to the bypass valves 250a and 250b in the control unit 200. The auxiliary switch valve 180a on the high-pressure gas pipe 120b will close, and the bypass valves a and 250b on the bypass pipe 120c will open. The bypass flow metering device 190b will be activated, and the sealing condition of the gas injector 300 under test will be determined by the value in the bypass flow metering device 190b.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A gas ejector performance testing device, characterized in that, include: A controllable gas source output module is used to output a gas source of 5 to 150 bar; A pressure and flow buffer module, the gas input end of which is connected to the gas output end of the controllable gas source output module, is used to ensure the stability of the system pressure supply and the responsiveness of large flow output. A flow detection and sealing test module is provided, wherein the gas input terminal of the flow detection and sealing test module is connected to the gas output terminal of the pressure flow buffer module, and the gas output terminal of the flow detection and sealing test module is connected to the gas input terminal of the adapter; the flow detection and sealing test module is used to test the flow rate and sealing performance of the gas injector under different pressures; during the test, the gas injector to be tested is installed in the adapter; A control unit is connected to the flow detection and sealing detection module, the adapter, and the gas injector to be tested. It also includes a silencing device, the gas input end of which is connected to the gas output end of the gas injector to be tested; It also includes a liquid storage tank, the inlet of which is connected to the outlet of the silencer; The flow detection and sealing detection module includes a main switching valve, a secondary switching valve, a first bypass valve, a second bypass valve, a main flow metering device, and a bypass flow metering device; the pressure and flow buffer module includes a pressure regulator, a pressure monitor, a temperature monitor, and a data conversion and transmission unit; the gas input terminal of the main switching valve is connected to the gas output terminal of the pressure regulator through a second high-pressure gas pipe, and the gas output terminal of the main switching valve is connected to the gas input terminal of the adapter through a third high-pressure gas pipe; the secondary switching valve and the main flow metering device are connected in series on the third high-pressure gas pipe, and a bypass pipe is connected in parallel on the third high-pressure gas pipe; the first bypass valve, the second bypass valve, and the bypass flow metering device are connected in series on the bypass pipe, wherein the bypass flow metering device is located between the first bypass valve and the second bypass valve; the main switching valve, the secondary switching valve, the first bypass valve, the second bypass valve, and the adapter are controllably connected to the control unit, and the main flow metering device and the bypass flow metering device are data-connected to the control unit; The output module of the controllable gas source includes a gas storage tank, a first high-pressure gas pipe, and a pressure regulating valve. The gas outlet and gas return of the gas storage tank are connected to the gas input end and gas return end of the pressure flow buffer module through the first high-pressure gas pipe. The pressure regulating valve is connected in series with the first high-pressure gas pipe to regulate the gas source pressure output by the gas storage tank. The gas input terminal of the pressure regulator is connected to the first high-pressure gas pipe, and the data conversion and transmission unit is connected to the pressure regulator through the pressure monitor and temperature monitor, and is also connected to the control unit. The silencer is connected to the gas output terminal of the adapter via an exhaust valve; the exhaust valve is connected to the control unit. Adjust the main switch valve to the closed state using the button on the control unit; set the pressure according to the pressure requirement of the gas injector to be tested using the pressure regulating valve, wait 10 seconds, and then allow the test medium to flow from the gas tank into the pressure regulator until it stabilizes; confirm the feedback parameters of the pressure monitor and temperature monitor in the data conversion and transmission unit; rotate the button corresponding to the exhaust valve in the control unit to open it; activate the power-on button on the control unit to drive the gas injector to be tested, causing the gas injector to start working, and the measurement time, power-on pulse width, and frequency of the gas injector to be tested are all within the PL of the control unit. In setting C; during the operation of the gas injector under test, the real-time flow rate will be synchronously displayed on the main flow metering device. After the test time ends, the average flow rate over a period of time will also be displayed on the main flow metering device. Press the power-off button for driving the gas injector under test in the control unit, observe the bubbling in the liquid storage tank. If bubbles emerge, start the power-on buttons corresponding to the first and second bypass valves in the control unit. The auxiliary switch valve on the high-pressure gas pipe will close, and the first and second bypass valves on the bypass pipe will open. The bypass flow metering device will be activated, and the sealing condition of the gas injector under test will be judged by the value in the bypass flow metering device.

2. The gas ejector performance testing device as described in claim 1, characterized in that, The main switching valve is a normally closed valve, and the auxiliary switching valve is a normally open valve, used to participate in the on / off control of the flow test path; the first bypass valve and the second bypass valve are both normally closed valves, used to participate in the on / off control of the sealing test path.

3. The gas ejector performance testing device as described in claim 2, characterized in that, The exhaust valve is a normally closed valve.

4. The gas ejector performance testing device as described in claim 3, characterized in that, The control unit uses a 16-bit microcontroller to output trigger commands to the main switching valve, the auxiliary switching valve, the first bypass valve, the second bypass valve, and the exhaust valve, as well as output the drive waveform of the gas injector to be detected.

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