CN113188802A - Tempering simulation experiment device for gas machine and use method - Google Patents
Tempering simulation experiment device for gas machine and use method Download PDFInfo
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- CN113188802A CN113188802A CN202110592887.8A CN202110592887A CN113188802A CN 113188802 A CN113188802 A CN 113188802A CN 202110592887 A CN202110592887 A CN 202110592887A CN 113188802 A CN113188802 A CN 113188802A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention discloses a gas engine tempering simulation experiment device and a using method thereof, wherein the gas engine tempering simulation experiment device comprises a tempering simulation combustion pipe, wherein the middle lower part of the tempering 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; and a reciprocating plunger, a sliding block, a connecting rod and an adjustable driving turntable crank assembly are distributed in the compensation telescopic cylinder. The device and the method can realize the advantages of pressure peak value setting, accurate detection result, good test repeatability, strong reliability and the like.
Description
Technical Field
The invention relates to the technical field of power machinery tests, in particular to a gas engine tempering simulation experiment device and a using method thereof.
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 for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
Aiming at the technical problems, the invention provides a pressure compensation type engine throttle backfire simulation generating device and method which are more accurate in simulation and good in using effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas engine backfire simulation experiment 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; and a reciprocating plunger, a sliding block, a connecting rod and an adjustable driving turntable crank assembly are distributed in the compensation telescopic cylinder. Furthermore, the adjustable driving turntable crank assembly comprises a driving turntable, a turntable driving shaft and an adjustable crank assembly, and proximity sensor assemblies are respectively and correspondingly arranged on the right side of the top end and the right side of the bottom end of the driving turntable; the adjustable crank assembly comprises a left adjusting crank platform and a right adjusting crank platform; the left adjusting crank platform and the right adjusting crank platform are respectively and correspondingly combined on the right side of the lower end of the connecting rod and the left side of the top end of the driving turntable; the left adjusting crank platform and the right adjusting crank platform are respectively provided with a movable groove, adjusting sliding blocks are respectively movably distributed in the movable grooves, and then the adjustable clamping is carried out through an upper compression bolt and a lower compression bolt; the two adjusting sliding blocks are connected through a connecting block, and the adjusting sliding blocks are rotatably connected with the connecting block; the left adjusting crank platform and the right adjusting crank platform are also respectively and correspondingly provided with scales, so that the adjusting slide block is convenient to accurately adjust the position, and the compression bolt is sleeved with a locking spring.
Furthermore, the adjustable driving turntable crank assembly also comprises an elastic stable sliding plate, the elastic stable sliding plate comprises a base plate and a balance plate, the base plate is provided with a plurality of lead column grooves, and springs are distributed in the lead column grooves; a plurality of balance lead columns are correspondingly arranged on the balance plate, and the balance lead columns are inserted into the lead column grooves and distributed; a groove is formed in the left side of the lower end of the connecting rod, and a rolling wheel assembly is correspondingly arranged in the groove; the right side of the balance plate presses the rolling wheel assembly.
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 second 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 gas machine tempering simulation experiment 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 adjusting an adjustable crank assembly to an optimal distance;
(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;
(3) the top end of the driving turntable rotates to the lowest point and stops at the proximity sensor, and the reciprocating plunger is pulled down;
(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, and at the moment, a motor of the electronic driving mixing cylinder drives a piston of the electronic driving mixing cylinder to push so as to maintain the upper air pressure values of the electronic driving mixing cylinder, the backfire simulation combustion pipe and the reciprocating plunger 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, the driving turntable rotates, the reciprocating plunger is continuously and stably pushed up to the top, waste gas impacts the electronic throttle valve sample piece, and one test cycle is completed after the waste gas is completely discharged from the opening of the electronic throttle valve sample piece;
(6) and finally, after the required test cycle number is completed, measuring deformation quantities of related parts of the electronic throttle valve sample to obtain required data.
Further, the determination of the optimal distance for adjusting the adjustable crank assembly is to perform adjustment test selection on the adjusting slider in the direction from the center of the driving turntable to the outside before performing a test experiment, so as to select whether the highest value generated in the backfire simulation combustion pipe is stable at the impact test air pressure peak value M after performing an ignition combustion test.
Compared with the prior art, the invention has the beneficial effects that:
(1) compared with a mixed gas pressure value used by a traditional device, the air pressure set value of the second air pressure sensor is lower, and the electronic throttle valve sample piece has 3-5% of opening degree in the test process, so that the loss of mixed combustion gas can be reduced, the relative stability of the air pressure value in the backfire simulation combustion pipe before ignition can be improved, and the controllability and repeatability of combustion energy can be improved.
(2) Through addding the flexible cylinder of compensation, reduce gas mixture atmospheric pressure and increase gas mixture entering volume, simultaneously, reciprocal plunger can move about, 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 invention realizes the controllable proportion mixing by arranging the combustible gas electronic filling cylinder and the air electronic filling cylinder, and then the arranged electronic driving mixing cylinder can ensure the relative stability of the air pressure of the mixed gas, improve the repeatability test effect and realize the accurate controllability.
(4) The adjustable crank assembly for adjusting the stroke of the telescopic cylinder can realize the adjustment and the variation of the stroke of the telescopic cylinder, and the design of the movable groove, the adjusting slide block, the pressing bolt, the anti-loosening spring and the like is adopted, so that the firmness of the rotating process and the convenience of adjustment can be realized when the functions are realized, the running stability is ensured, the condition that the stroke of the telescopic cylinder is automatically changed in the midway of the running process is not found through long-term running tests, and the reliability is good. The elastic stable sliding plate ensures the stability of the whole operation, and the adjustment operation is accurate and reliable and the use effect is good.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of the adjustable drive dial crank assembly of the present invention.
Detailed Description
A gas engine backfire simulation experiment 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 20; 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.
And a reciprocating plunger 17, a sliding block 18, a connecting rod 19 and an adjustable driving turntable crank assembly are distributed in the compensation telescopic cylinder 20. The connection relation of the reciprocating plunger piston 17, the sliding block 18 and the connecting rod 19 is the prior art, and the innovation lies in the adjustable driving turntable crank component; the adjustable driving turntable crank assembly comprises a driving turntable 23, a turntable driving shaft 31 and an adjustable crank assembly, and proximity sensor assemblies 32-1 and 32 are respectively and correspondingly arranged on the right side of the top end and the right side of the bottom end of the driving turntable 23; the adjustable crank assembly comprises a left adjusting crank platform 21 and a right adjusting crank platform 22; the left adjusting crank platform 21 and the right adjusting crank platform 22 are correspondingly combined on the right side of the lower end of the connecting rod 19 and the left side of the top end of the driving turntable 23 respectively; the left adjusting crank platform and the right adjusting crank platform are respectively provided with a movable groove 22-1, adjusting sliders 33 and 30 are movably distributed in the movable groove 22-1 respectively, and then the adjustable clamping is carried out through an upper compression bolt 27, a lower compression bolt 25, a compression bolt 24 and a compression bolt 29 respectively; the two adjusting sliding blocks 33 and 30 are connected through a connecting block 28, and the adjusting sliding block 33 on the left side is rotatably connected with the connecting block 28; the left adjusting crank platform and the right adjusting crank platform are also respectively and correspondingly provided with scales, so that the adjusting slide block is convenient to accurately adjust, and the compression bolts are respectively sleeved with the anti-loosening springs 39.
The adjustable driving turntable crank assembly further comprises an elastic stable sliding plate, the elastic stable sliding plate comprises a base plate 36 and a balance plate 34, a plurality of lead column grooves 38 are formed in the base plate 36, and springs 37 are distributed in the lead column grooves 38; a plurality of balance lead columns 35 are correspondingly arranged on the balance plate 34, and the balance lead columns 35 are inserted into the lead column grooves 38 for distribution; a groove is formed in the left side of the lower end of the connecting rod, and a rolling wheel assembly 21-1 is correspondingly arranged in the groove; the right side of the balance plate presses the rolling wheel assembly.
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 second 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 gas machine tempering simulation experiment 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 adjusting an adjustable crank assembly to an optimal distance;
(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; (in the pressure value A mixed gas in the system environment in the backfire simulation combustion tube 16 combustion, the generated combustion after the highest pressure is lower than the impact test pressure peak value M, but through the reciprocating plunger push-up pressure, only impels the impact test pressure peak value to reach M, this strategy significantly improves each repeated test basically near impact test pressure peak value M, and stop traditional high pressure mixed gas, mixed gas rapid loss and each repeated test combustion degree of different degrees of factors and final impact test pressure peak value difference, inaccurate assessment problems)
(3) The top end of the driving turntable rotates to the lowest point and stops at the proximity sensor, and the reciprocating plunger is pulled down;
(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, and at the moment, a motor of the electronic driving mixing cylinder drives a piston of the electronic driving mixing cylinder to push so as to maintain the upper air pressure values of the electronic driving mixing cylinder, the backfire simulation combustion pipe and the reciprocating plunger 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, the driving turntable rotates, the reciprocating plunger is continuously and stably pushed up to the top, waste gas impacts the electronic throttle valve sample piece, and one test cycle is completed after the waste gas is completely discharged from the opening of the electronic throttle valve sample piece;
(6) and finally, after the required test cycle number is completed, measuring deformation quantities of related parts of the electronic throttle valve sample to obtain required data.
Further, the determination of the optimal distance for adjusting the adjustable crank assembly is to perform adjustment test selection on the adjusting slider in the direction from the center of the driving turntable to the outside before performing a test experiment, so as to select whether the highest value generated in the backfire simulation combustion pipe is stable at the impact test air pressure peak value M after performing an ignition combustion test.
Claims (8)
1. The utility model provides a gas machine tempering simulation experiment 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; and a reciprocating plunger, a sliding block, a connecting rod and an adjustable driving turntable crank assembly are distributed in the compensation telescopic cylinder.
2. The gas machine tempering simulation experiment device according to claim 1, wherein: the adjustable driving turntable crank assembly comprises a driving turntable, a turntable driving shaft and an adjustable crank assembly, and proximity sensor assemblies are respectively and correspondingly arranged on the right side of the top end and the right side of the bottom end of the driving turntable; the adjustable crank assembly comprises a left adjusting crank platform and a right adjusting crank platform; the left adjusting crank platform and the right adjusting crank platform are respectively and correspondingly combined on the right side of the lower end of the connecting rod and the left side of the top end of the driving turntable; the left adjusting crank platform and the right adjusting crank platform are respectively provided with a movable groove, adjusting sliding blocks are respectively movably distributed in the movable grooves, and then the adjustable clamping is carried out through an upper compression bolt and a lower compression bolt; the two adjusting sliding blocks are connected through a connecting block, and the adjusting sliding blocks are rotatably connected with the connecting block; the left adjusting crank platform and the right adjusting crank platform are also respectively and correspondingly provided with scales, so that the adjusting slide block is convenient to accurately adjust the position, and the compression bolt is sleeved with a locking spring.
3. The gas machine tempering simulation experiment device according to claim 2, wherein: the adjustable driving turntable crank assembly further comprises an elastic stable sliding plate, the elastic stable sliding plate comprises a base plate and a balance plate, a plurality of lead column grooves are formed in the base plate, and springs are distributed in the lead column grooves; a plurality of balance lead columns are correspondingly arranged on the balance plate, and the balance lead columns are inserted into the lead column grooves and distributed; a groove is formed in the left side of the lower end of the connecting rod, and a rolling wheel assembly is correspondingly arranged in the groove; the right side of the balance plate presses the rolling wheel assembly.
4. The gas machine tempering simulation experiment device according to claim 1, wherein: the right end of the backfire simulation combustion pipe is also connected with a safety exhaust valve.
5. The gas machine tempering simulation experiment device according to claim 1, wherein: when the electronic throttle valve sample piece is used, the opening degree is 3-5 degrees.
6. The gas machine tempering simulation experiment device according to claim 1, wherein: the constant-pressure mixed gas supply assembly comprises an electronic driving mixing cylinder, wherein a second 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.
7. The test method performed by using the gas machine tempering simulation experiment device according to any one of claims 1 to 6, wherein the test method 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 adjusting an adjustable crank assembly to an optimal distance;
(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;
(3) the top end of the driving turntable rotates to the lowest point and stops at the proximity sensor, and the reciprocating plunger is pulled down;
(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, and at the moment, a motor of the electronic driving mixing cylinder drives a piston of the electronic driving mixing cylinder to push so as to maintain the upper air pressure values of the electronic driving mixing cylinder, the backfire simulation combustion pipe and the reciprocating plunger 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, the driving turntable rotates, the reciprocating plunger is continuously and stably pushed up to the top, waste gas impacts the electronic throttle valve sample piece, and one test cycle is completed after the waste gas is completely discharged from the opening of the electronic throttle valve sample piece;
(6) and finally, after the required test cycle number is completed, measuring deformation quantities of related parts of the electronic throttle valve sample to obtain required data.
8. The test method of claim 7, wherein: and the determination of the optimal distance for adjusting the adjustable crank component is that before a test experiment is carried out, the adjustment test selection is carried out on the adjusting slide block from the direction of the circle center of the driving turntable to the outside so as to select whether the highest value generated in the backfire simulation combustion pipe is stable at the impact test air pressure peak value M or not after an ignition combustion test is carried out.
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| CN202110592887.8A CN113188802A (en) | 2021-05-28 | 2021-05-28 | Tempering simulation experiment device for gas machine and use method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114375867A (en) * | 2022-01-17 | 2022-04-22 | 珠海艾宠洁智能设备科技有限公司 | Rotary jet flushing system of intelligent pet single washing machine |
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2021
- 2021-05-28 CN CN202110592887.8A patent/CN113188802A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114375867A (en) * | 2022-01-17 | 2022-04-22 | 珠海艾宠洁智能设备科技有限公司 | Rotary jet flushing system of intelligent pet single washing machine |
| CN114375867B (en) * | 2022-01-17 | 2023-02-17 | 珠海艾宠洁智能设备科技有限公司 | Rotary spraying and flushing system of intelligent pet single washing machine |
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