CN214748874U - Pressure compensation type engine throttle valve backfire simulation generating device - Google Patents
Pressure compensation type engine throttle valve backfire simulation generating device Download PDFInfo
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- CN214748874U CN214748874U CN202121174757.4U CN202121174757U CN214748874U CN 214748874 U CN214748874 U CN 214748874U CN 202121174757 U CN202121174757 U CN 202121174757U CN 214748874 U CN214748874 U CN 214748874U
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Abstract
The utility model discloses a pressure compensation type engine throttle backfire simulation generating device, which comprises a backfire simulation combustion pipe, wherein the middle lower part of the backfire simulation combustion pipe is vertically communicated with a compensation telescopic cylinder; the upper part of the tempering simulation combustion pipe is connected with an electronic throttle valve sample, and an igniter and a first air pressure sensor are distributed in the tempering simulation combustion pipe; the left end of the backfire simulation combustion pipe is connected with a constant-pressure mixed gas supply assembly. The device can realize the advantages of setting the pressure peak value, accurate detection result, good test repeatability, strong reliability and the like.
Description
Technical Field
The utility model relates to a power machinery test technical field, concretely relates to pressure compensation type engine air throttle backfire simulation generating device.
Background
Backfire, i.e. unexpected detonation of premixed combustible gas in the intake duct before the premixed combustible gas enters the combustion chamber of the engine, is a common fault phenomenon of the current single-point injection natural gas engine. When a backfire fault occurs, instantaneous pressure impact can be generated in the air inlet pipe, and parts such as a sensor, an actuator and the like in the pipeline are damaged. Similar impact simulation generating devices on the market at present all produce instantaneous pressure impact by igniting flammable and explosive gases such as propane and the like in a simple test blasting tube, the pressure peak value is uncontrollable, and test data is inaccurate.
The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.
Disclosure of Invention
The utility model provides a pressure compensation type engine air throttle backfire simulation generating device that simulation is more accurate, excellent in use effect to above-mentioned technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pressure compensation type engine throttle valve backfire simulation generating device comprises a backfire simulation combustion pipe, wherein the middle lower part of the backfire simulation combustion pipe is vertically communicated with a compensation telescopic cylinder; the upper part of the tempering simulation combustion pipe is connected with an electronic throttle valve sample, and an igniter and a first air pressure sensor are distributed in the tempering simulation combustion pipe; the left end of the backfire simulation combustion pipe is connected with a constant-pressure mixed gas supply assembly.
Furthermore, a lead central shaft is distributed in the compensation telescopic cylinder, and a compensation piston is movably distributed on the lead central shaft; the lower part of the compensation telescopic cylinder is provided with a second air pressure sensor and is also communicated with a high-pressure air inlet pipe and an air outlet pipe; the air outlet pipe is distributed with an electric control valve; the high-pressure air inlet pipe is communicated with a first air storage cavity and a second air storage cavity through an air inlet branch pipe, and electric control valves are distributed on the air inlet branch pipes; the first gas storage cavity and the second gas storage cavity are both communicated with a gas compressor, and electric control valves are respectively arranged between the first gas storage cavity and the gas compressor; and a third air pressure sensor and a fourth air pressure sensor are respectively distributed in the first air storage cavity and the second air storage cavity.
Furthermore, the right end of the backfire simulation combustion pipe is also connected with a safety exhaust valve.
Further, when the electronic throttle valve sample piece is used, the opening degree is 3-5 degrees.
Furthermore, the constant-pressure mixed gas supply assembly comprises an electronic driving mixing cylinder, wherein a fifth air pressure sensor, an electronic driving piston and a safety valve are distributed in the electronic driving mixing cylinder; an exhaust port of the electronic driving mixing cylinder is connected with the left end of the backfire simulation combustion pipe through a communicating pipe, and an electric control valve and a one-way air valve are arranged on the communicating pipe; the gas electronic filling cylinder and the air electronic filling cylinder are respectively provided with an electric control valve and a one-way air valve at the air inlet and the air outlet, and the air outlets are respectively communicated with the right end of the electronic driving mixing cylinder.
The testing method using the pressure compensation type engine throttle backfire simulation generating device comprises the following steps:
(1) determining an impact test air pressure peak value M required after the backfire simulation combustion pipe is combusted according to the type of the engine and the requirement, and then adjusting and determining pressure values of a first air pressure sensor, a third air pressure sensor, a fourth air pressure sensor and a fifth air pressure sensor which correspond to the first air pressure sensor, the third air pressure sensor, the fourth air pressure sensor and the fifth air pressure sensor;
(2) filling gas into the electronic driving mixing cylinder by using the combustible gas electronic filling cylinder and the air electronic filling cylinder according to a required proportion until the gas pressure in the electronic driving mixing cylinder reaches a set value A; the air compressor respectively inflates the first air storage cavity and the second air storage cavity, and the closing of an electric control valve between the air compressor and the air compressor is respectively controlled according to the set pressure values of a third air pressure sensor and a fourth air pressure sensor; the optimal air pressure value A1 of the first air storage cavity needs to be determined by a plurality of tests, and the air pressure value of the second air storage cavity is M;
(3) an electric control valve on an air inlet branch pipe between the first air storage cavity and the compensation telescopic cylinder is opened, and a compensation piston is pushed up;
(4) an electric control valve on the communicating pipe is opened, the electronic driving mixing cylinder leads in mixed gas to the backfire simulation combustion pipe, a compensation piston is pushed down, and at the moment, a motor of the electronic driving mixing cylinder drives the piston to push so as to maintain the upper air pressure value of the electronic driving mixing cylinder, the backfire simulation combustion pipe and the compensation telescopic cylinder to be stable to A;
(5) an electric control valve on the communicating pipe is closed, then an igniter is used for ignition, and the mixed gas is combusted in the backfire simulation combustion pipe; meanwhile, an electric control valve on the air inlet branch pipe between the first air storage cavity and the compensation telescopic cylinder is closed, and an electric control valve on the air inlet branch pipe between the second air storage cavity and the compensation telescopic cylinder is opened; at the moment, the compensation piston continuously presses up stably, waste gas impacts the electronic throttle valve sample piece, and the waste gas is completely discharged from the opening of the electronic throttle valve sample piece;
(6) then an electric control valve on an air outlet pipe of the compensation telescopic cylinder is opened, and the electric control valve is closed when the air pressure value of the lower part of the compensation telescopic cylinder is reduced to be lower than A1; then opening an electrically controlled valve on an air inlet branch pipe between the first air storage cavity and the compensation telescopic cylinder to maintain the air pressure value at A1; and after completing one test cycle and finally completing the required test cycle times, measuring deformation quantities of related parts of the electronic throttle valve sample to obtain required data.
Further, the determination of the optimal air pressure value a1 is to test and select the air pressure value in the first air storage cavity from a high value not higher than M to a bottom value before performing the test experiment, so as to determine whether the highest value generated in the flashback-simulating combustion tube after performing the ignition combustion test is stable at the impact test air pressure peak value M, thereby selecting the optimal air pressure value a 1.
The utility model has the advantages of compared with the prior art:
(1) the utility model discloses a gas mixture atmospheric pressure value that traditional device used is compared to fifth baroceptor's atmospheric pressure setting value is lower, because electronic throttle sample piece all has 3 ~ 5% aperture at the test procedure, can reduce the loss of mixed combustion gas like this, can improve the relative stability of the interior atmospheric pressure value of the preceding tempering simulation combustion tube of igniteing simultaneously, improves controllability and the repeatability of combustion energy.
(2) Through addding the flexible cylinder of compensation, reduce gas mixture atmospheric pressure and increase gas mixture entering volume, simultaneously, the compensation piston can be moved, and the purpose is used for improving the atmospheric pressure dynamic stability of test system to improve the controllability of repeated test atmospheric pressure, ensure the test precision, after the gas mixture burning, maintain/improve and obtain required maximum pressure value through further compression, improve the test value degree of accuracy.
(3) The atmospheric pressure essence that the gas mixture burning release heat and produced influences greatly with the air-fuel ratio, and the highest burning atmospheric pressure that the repetition test of traditional device obtained at every turn is uneven, can't carry out effective control to atmospheric pressure, more can't realize the precision of test, the utility model discloses a be equipped with the combustible gas electron filling jar with the air electron filling jar realizes controllable proportion and mixes, then the electronic drive who is equipped with mixes the jar, can ensure the relative stability of gas mixture atmospheric pressure, improves the repeatability test effect, realizes accurate controllable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
A pressure compensation type engine throttle valve backfire simulation generating device comprises a backfire simulation combustion pipe 16, wherein the middle lower part of the backfire simulation combustion pipe 16 is vertically communicated with a compensation telescopic cylinder 24; the upper part of the backfire simulation combustion pipe 16 is connected with an electronic throttle valve sample 12, and an igniter 26, a first air pressure sensor 14 and a temperature sensor 13 are distributed in the backfire simulation combustion pipe; the left end of the backfire simulation combustion tube 16 is connected with a constant-pressure mixed gas supply assembly. The right end of the backfire simulation combustion pipe 16 is also connected with a safety exhaust valve 15, and a protection device is opened to prevent explosion when the air pressure is too large or equipment fails. When the test is carried out, the opening degree of the electronic throttle valve sample 12 is 3-5 degrees, and the outside of the electronic throttle valve sample is communicated with the atmosphere.
A lead central shaft 17 is distributed in the compensation telescopic cylinder 24, a compensation piston 20 is movably distributed on the lead central shaft 17, and a sealing rubber ring 23 is arranged at the center of the compensation piston 20; the lower part of the compensation telescopic cylinder 24 is provided with a second air pressure sensor 19 which is also communicated with a high-pressure air inlet pipe 22 and an air outlet pipe 21; an electric control valve 25 is distributed on the air outlet pipe 21, and the air outlet pipe 21 of the embodiment can be set to be a small pipe, so that slow air release operation is facilitated; the high-pressure air inlet pipe is communicated with a first air storage cavity 18 and a second air storage cavity 28 through two air inlet branch pipes, and electric control valves are distributed on the air inlet branch pipes; the first air storage cavity 18 and the second air storage cavity 28 are both communicated with an air compressor 27, and electric control valves are respectively arranged between the first air storage cavity and the air compressor; and when the air pressure in the air storage cavity reaches a set value, the air storage cavity is closed through the electric control valve, and the air storage cavity is opened to continuously supplement air when the air pressure value is lower than the set value.
The constant-pressure mixture supply assembly includes an electronically-driven mixing cylinder 1, a fuel gas electronic charging cylinder 5, and an air electronic charging cylinder 10, and to improve accuracy, a servo electric cylinder is preferably used. A fifth air pressure sensor 7, an electronic driving piston 2 and a safety valve 1-1 are distributed in the electronic driving mixing cylinder; the exhaust port of the electronic driving mixing cylinder is connected with the left end of the backfire simulation combustion pipe 16 through a communicating pipe, and an electric control valve 11 and a one-way air valve are arranged on the communicating pipe; the gas inlet and the gas outlet of the combustible gas electronic filling cylinder and the air electronic filling cylinder are respectively provided with an electric control valve 4,6,8,9 and a one-way air valve, and the gas outlets of the electric control valves are respectively communicated with the right end of the electronic driving mixing cylinder.
The testing method using the pressure compensation type engine throttle backfire simulation generating device comprises the following steps:
(1) determining an impact test air pressure peak value M required after combustion of the backfire simulation combustion pipe 16 according to the type of the engine and the requirement, and then adjusting and determining pressure values of a first air pressure sensor, a third air pressure sensor, a fourth air pressure sensor and a fifth air pressure sensor which correspond to the first air pressure sensor, the third air pressure sensor, the fourth air pressure sensor and the fifth air pressure sensor;
(2) the combustible gas electronic filling cylinder and the air electronic filling cylinder are used for filling gas into an inner cavity 3 of the electronic driving mixing cylinder according to a required proportion until the air pressure in the electronic driving mixing cylinder reaches a set value A (the mixed gas with the air pressure value A is combusted in a backfire simulation combustion pipe 16 under the system environment, the generated highest air pressure after combustion is lower than an impact test air pressure peak value M, and finally the impact test air pressure peak value is enabled to reach M through the upward pushing and pressurizing of a compensation piston, so that the strategy remarkably improves the impact test air pressure peak value M basically close to the impact test air pressure peak value M in each repeated test, and the problems of large final impact test air pressure peak value difference and inaccurate evaluation caused by the rapid loss of the mixed gas, the inconsistent combustion degree of each repeated test and the like under the traditional high-air pressure mixed gas are solved; the air compressor respectively inflates the first air storage cavity and the second air storage cavity, and the closing of an electric control valve between the air compressor and the air compressor is respectively controlled according to the set pressure values of a third air pressure sensor and a fourth air pressure sensor; the optimal air pressure value A1 of the first air storage cavity needs to be determined by a plurality of tests, and the air pressure value of the second air storage cavity is M;
(3) an electric control valve on an air inlet branch pipe between the first air storage cavity and the compensation telescopic cylinder 24 is opened, and a compensation piston is pushed up;
(4) the electronic control valve on the communicating pipe is opened, the electronic driving mixing cylinder introduces mixed gas to the backfire simulation combustion pipe 16, the compensation piston is pushed down, the mixed gas enters an upper inner cavity 24-1 of the compensation piston, and at the moment, the motor of the electronic driving mixing cylinder drives the piston to push, so that the upper air pressure values of the electronic driving mixing cylinder, the backfire simulation combustion pipe 16 and the compensation telescopic cylinder 24 are kept stable to A;
(5) an electric control valve on the communicating pipe is closed, then an igniter is used for ignition, and the mixed gas is combusted in the backfire simulation combustion pipe 16; meanwhile, an electric control valve on the air inlet branch pipe between the first air storage cavity and the compensation telescopic cylinder 24 is closed, and an electric control valve on the air inlet branch pipe between the second air storage cavity and the compensation telescopic cylinder 24 is opened; at this time, the compensation piston continuously presses up stably, the waste gas impacts the electronic throttle valve sample 12, and the waste gas is completely discharged from the opening of the electronic throttle valve sample;
(6) then, an electric control valve on an air outlet pipe of the compensation telescopic cylinder 24 is opened, and the electric control valve is closed when the air pressure value of the lower part of the compensation telescopic cylinder 24 is reduced to be lower than A1; then, an electrically controlled valve on an air inlet branch pipe between the first air storage cavity and the compensation telescopic air cylinder 24 is opened to maintain the air pressure value at A1; and after completing one test cycle and finally completing the required test cycle times, measuring deformation quantities of related parts of the electronic throttle valve sample 12 to obtain required data.
Further, the determination of the optimal air pressure value a1 is to perform a previous screening test before performing the test experiment, that is, the air pressure value in the first air storage cavity is tested and selected from a high value not higher than M to a bottom value, so as to determine the optimal air pressure value a1 as to whether the highest value generated in the backfire simulated combustion tube 16 after performing the ignition combustion test is stable at the impact test air pressure peak value M, and after the selection, the a1 value is used in a subsequent test (repeated test) in a unified manner.
Claims (5)
1. The utility model provides a pressure compensation formula engine air throttle backfire simulation generating device which characterized in that: the device comprises a backfire simulation combustion pipe, wherein the middle lower part of the backfire simulation combustion pipe is vertically communicated with a compensation telescopic cylinder; the upper part of the tempering simulation combustion pipe is connected with an electronic throttle valve sample, and an igniter and a first air pressure sensor are distributed in the tempering simulation combustion pipe; the left end of the backfire simulation combustion pipe is connected with a constant-pressure mixed gas supply assembly.
2. The pressure compensated engine throttle flashback simulation generating device of claim 1, characterized in that: a lead central shaft is distributed in the compensation telescopic cylinder, and a compensation piston is movably distributed on the lead central shaft; the lower part of the compensation telescopic cylinder is provided with a second air pressure sensor and is also communicated with a high-pressure air inlet pipe and an air outlet pipe; the air outlet pipe is distributed with an electric control valve; the high-pressure air inlet pipe is communicated with a first air storage cavity and a second air storage cavity through an air inlet branch pipe, and electric control valves are distributed on the air inlet branch pipes; the first gas storage cavity and the second gas storage cavity are both communicated with a gas compressor, and electric control valves are respectively arranged between the first gas storage cavity and the gas compressor; and a third air pressure sensor and a fourth air pressure sensor are respectively distributed in the first air storage cavity and the second air storage cavity.
3. The pressure compensated engine throttle flashback simulation generating device of claim 1, characterized in that: the right end of the backfire simulation combustion pipe is also connected with a safety exhaust valve.
4. The pressure compensated engine throttle flashback simulation generating device of claim 1, characterized in that: when the electronic throttle valve sample piece is used, the opening degree is 3-5 degrees.
5. The pressure compensated engine throttle flashback simulation generating device of claim 1, characterized in that: the constant-pressure mixed gas supply assembly comprises an electronic driving mixing cylinder, a fifth air pressure sensor, an electronic driving piston and a safety valve are distributed in the electronic driving mixing cylinder; an exhaust port of the electronic driving mixing cylinder is connected with the left end of the backfire simulation combustion pipe through a communicating pipe, and an electric control valve and a one-way air valve are arranged on the communicating pipe; the gas electronic filling cylinder and the air electronic filling cylinder are respectively provided with an electric control valve and a one-way air valve at the air inlet and the air outlet, and the air outlets are respectively communicated with the right end of the electronic driving mixing cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121174757.4U CN214748874U (en) | 2021-05-28 | 2021-05-28 | Pressure compensation type engine throttle valve backfire simulation generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121174757.4U CN214748874U (en) | 2021-05-28 | 2021-05-28 | Pressure compensation type engine throttle valve backfire simulation generating device |
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| Publication Number | Publication Date |
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| CN214748874U true CN214748874U (en) | 2021-11-16 |
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| CN202121174757.4U Active CN214748874U (en) | 2021-05-28 | 2021-05-28 | Pressure compensation type engine throttle valve backfire simulation generating device |
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- 2021-05-28 CN CN202121174757.4U patent/CN214748874U/en active Active
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