CN109000918B - Testing device and testing method for electric control fuel gas injection valve of gas engine - Google Patents
Testing device and testing method for electric control fuel gas injection valve of gas engine Download PDFInfo
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- CN109000918B CN109000918B CN201811110842.7A CN201811110842A CN109000918B CN 109000918 B CN109000918 B CN 109000918B CN 201811110842 A CN201811110842 A CN 201811110842A CN 109000918 B CN109000918 B CN 109000918B
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- 239000007789 gas Substances 0.000 title claims abstract description 196
- 238000002347 injection Methods 0.000 title claims abstract description 143
- 239000007924 injection Substances 0.000 title claims abstract description 143
- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 239000002737 fuel gas Substances 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 claims abstract description 49
- 238000005259 measurement Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000003584 silencer Effects 0.000 claims 2
- 238000009530 blood pressure measurement Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/025—Details with respect to the testing of engines or engine 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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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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
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A testing device for an electric control fuel gas injection valve of a gas engine comprises an air supply mechanism and a flow testing mechanism. The flow testing mechanism comprises a first branch pipeline, a second branch pipeline, a first pressure regulating valve, a buffer, a first flow meter, a first pressure sensor, a second pressure sensor and a first station platform for placing an electric control gas injection valve to be tested. The inlet of the first branch pipeline is communicated with the air supply mechanism, the first pressure regulating valve is arranged on the first branch pipeline, and the outlet of the first branch pipeline is used for communicating with the gas inlet of the electric control gas injection valve; the first pressure sensor is disposed on the first branch line. The inlet of the second branch pipeline is used for being communicated with the gas outlet of the electric control gas injection valve, and the second pressure sensor, the buffer and the first flowmeter are sequentially arranged on the second branch pipeline along the gas conveying direction. The invention also discloses a testing method of the testing device of the gas engine electric control gas injection valve. The invention can test the steady-state flow and the dynamic flow of the electric control fuel gas injection valve.
Description
Technical Field
The invention relates to a testing device and a testing method for testing the performance of an electric control fuel gas injection valve of a gas engine.
Background
As the core component of the gas engine gas supply system, the electric control gas injection valve has the function of injecting certain natural gas into the engine air inlet channel or the cylinder to be mixed with air at certain pressure, and the gas inflow is mainly controlled by adjusting the injection pulse width, so that the performance of the electric control gas injection valve is directly related to the performance, combustion and emission of the engine. The structure of the conventional common gas injection valve can be described in China patent application with the application number 201610771921.7, of which the application date is 8/31/2016. The existing electric control fuel gas injection valve comprises a valve body, an electromagnet and a valve core assembly. The electromagnet and the valve core assembly are both arranged in the valve body, and the electromagnet is positioned above the valve core assembly and is connected with the valve body. The valve core assembly comprises an armature, a spring seat, an upper valve disc, a lower valve disc, a plurality of springs and connecting screws. The armature is located the below of electro-magnet, and the lower extreme of armature stretches into in the centre bore of spring holder. The upper valve disc is positioned below the armature, and the connecting screw penetrates through the central hole of the upper valve disc to be connected with the armature. The springs are positioned between the spring seat and the upper valve disc, and the upper end and the lower end of each spring are respectively abutted against the spring seat and the upper valve disc. The spring seat is detachably connected with the valve body. The bottom surface of the lower valve disc is provided with a plurality of air outlet holes; the upper valve disc can move between the turn-off position and the turn-on position, when the electromagnet is powered off, the upper valve disc is in the turn-off position, the bottom surface of the upper valve disc is tightly attached to the top surface of the lower valve disc to form a sealing plane, when the electromagnet is powered on, the upper valve disc is in the turn-on position, a fuel gas channel is formed between the bottom surface of the upper valve disc and the top surface of the lower valve disc, and the fuel gas channel is communicated with a plurality of air outlet holes of the lower valve disc.
The main performance parameters of the electric control fuel gas injection valve comprise static valve disc leakage quantity, stability requirement, gas quantity consistency, dynamic response, surface leakage quantity and the like. When the leakage amount is too high, deterioration of engine performance and emission may be caused, and even a risk of explosion may be generated. As the gas injection valve operating time increases, the valve disc surface wear increases and the leakage amount increases. Ideally, when the injection pulse width is the same, the gas amount of each gas injection valve is the same; however, in practical situations, there is a flow difference between valves, and a single valve also has a flow drift, so that the consistency and stability of the electronically controlled gas injection valve need to be measured.
Therefore, in the development and application process of the electric control gas injection valve product, the performance parameters of the electric control gas injection valve product need to be tested and verified, however, due to the reasons of high compressibility, high pressure fluctuation, high injection frequency and the like, the measurement of the single injection quantity and the injection rule of the electric control gas injection valve is very difficult, and no special device for testing the electric control gas injection valve exists in the market at present.
Disclosure of Invention
The invention aims to provide a gas engine electric control gas injection valve testing device capable of testing steady-state flow and dynamic flow of a gas engine electric control gas injection valve.
The invention aims to provide a gas engine electric control gas injection valve testing device which can test the leakage quantity between valve discs of the gas engine electric control gas injection valve and the leakage quantity on the surface of a valve body.
The invention further aims to provide a testing method of the electric control fuel gas injection valve of the gas engine.
According to the embodiment of the invention, the testing device for the electric control fuel gas injection valve of the gas engine comprises an air supply mechanism and a flow testing mechanism: the flow testing mechanism comprises a first branch pipeline, a second branch pipeline, a first pressure regulating valve, a buffer, a first flowmeter, a first pressure sensor, a second pressure sensor and a first station platform for placing an electric control gas injection valve to be tested; the inlet of the first branch pipeline is communicated with the outlet of the air supply mechanism, the first pressure regulating valve is arranged on the first branch pipeline, and the outlet of the first branch pipeline is used for being communicated with the gas inlet of the electric control gas injection valve arranged on the first station platform; the first pressure sensor is arranged on the first branch pipeline and is positioned between the first pressure regulating valve and the outlet of the first branch pipeline; the inlet of the second branch pipeline is used for being communicated with the gas outlet of the electric control gas injection valve arranged on the first station platform, and the second pressure sensor, the buffer and the first flowmeter are sequentially arranged on the second branch pipeline along the gas conveying direction.
Further, the gas engine electric control gas injection valve testing device comprises a leakage test mechanism; the leakage quantity testing mechanism comprises a third branch pipeline, a fourth branch pipeline, a second pressure regulating valve, a first stop valve, a second flowmeter, a third pressure sensor and a second station platform for placing an electric control gas injection valve to be tested; the inlet of the third branch pipeline is communicated with the outlet of the air supply mechanism, the second pressure regulating valve is arranged on the third branch pipeline, and the outlet of the third branch pipeline is used for being communicated with the gas inlet of the electric control gas injection valve arranged on the second station platform; the first stop valve and the second flowmeter are sequentially arranged on the fourth branch pipeline along the gas conveying direction; the third pressure sensor is arranged on the third branch pipeline or the fourth branch pipeline; when the third pressure sensor is arranged on the third branch pipeline, the third pressure sensor is positioned between the second pressure regulating valve and the outlet of the third branch pipeline, and when the third pressure sensor is arranged on the fourth branch pipeline, the third pressure sensor is positioned between the inlet of the fourth branch pipeline and the first stop valve.
The invention provides a testing method of the testing device of the electric control gas injection valve of the gas engine, which comprises the following steps:
Placing an electric control gas injection valve to be tested on a first station table, and connecting a gas inlet and a gas outlet of the electric control gas injection valve with an outlet of a first branch pipeline and an inlet of a second branch pipeline respectively;
Controlling the electric control gas injection valve to be in a normally open state, inputting gas to the electric control gas injection valve through the air supply mechanism, enabling the difference between the detection value of the first pressure sensor and the detection value of the second pressure sensor to reach a first differential pressure set value through adjusting the first pressure regulating valve, keeping a first set time, recording the flow measurement value of the first flowmeter, and taking the recorded flow measurement value as the steady-state flow of the electric control gas injection valve;
the electronic control fuel gas injection valve is controlled to be in a normal working state, the difference between the detection value detected by the first pressure sensor and the detection value detected by the second pressure sensor reaches a second differential pressure set value through adjusting the first pressure regulating valve, the second set time is kept, the flow measurement value of the first flowmeter is recorded, and the recorded flow measurement value is used as the dynamic flow of the electronic control fuel gas injection valve.
The invention also provides a testing method of the testing device of the gas engine electric control gas injection valve, which comprises the following steps:
Placing an electric control gas injection valve to be tested on a second station table, and respectively connecting a gas inlet and a gas outlet of the electric control gas injection valve with an outlet of a third branch pipeline and an inlet of a fourth branch pipeline;
Controlling the electric control gas injection valve to be in a closed state, opening the first stop valve, inputting gas to the electric control gas injection valve through the air supply mechanism, adjusting the second pressure regulating valve to enable the inlet pressure of the electric control gas injection valve to reach a preset first test pressure, recording the flow measurement value of the second flowmeter, and taking the recorded flow measurement value of the second flowmeter as the leakage quantity between valve discs when the electric control gas injection valve is closed;
And adjusting the second pressure regulating valve to enable the inlet pressure of the electric control gas injection valve to reach a preset second test pressure, wherein the second test pressure is larger than the first test pressure, closing the second pressure regulating valve and the first stop valve, calculating the pressure drop rate according to the pressure measured value of the third pressure sensor, and taking the pressure drop rate as an evaluation index of the surface leakage of the valve body of the electric control gas injection valve.
The invention has the following advantages:
1. In the gas engine electric control gas injection valve testing device according to the embodiment of the invention, the flow testing mechanism can measure the steady-state flow and the dynamic flow of the electric control gas injection valve, so as to evaluate the consistency and the stability requirements of the electric control gas injection valve. The stability of the electric control gas injection valve can be qualitatively estimated by measuring the steady-state flow and the dynamic flow of the electric control gas injection valve for a plurality of times; the consistency of the electric control gas injection valve can be qualitatively evaluated by replacing the electric control gas injection valve to be tested;
2. In the gas engine electric control gas injection valve testing device according to the embodiment of the invention, the leakage amount measuring mechanism can measure the leakage amount between the valve discs and the leakage amount on the surface of the valve body when the electric control gas injection valve is closed;
3. According to the testing device for the electric control gas injection valve of the gas engine, provided by the embodiment of the invention, the main performance index of the electric control gas injection valve is tested, and good guarantee is provided for product research and development and application.
Drawings
FIG. 1 is a schematic diagram showing the structure of an embodiment of the test device for the electronically controlled fuel gas injection valve of the gas engine.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing the structure of an embodiment of the test device for the electronically controlled fuel gas injection valve of the gas engine. Referring to fig. 1, a testing device for an electrically controlled fuel gas injection valve of a gas engine according to an embodiment of the present invention includes an air supply mechanism, a flow rate testing mechanism, and a leakage amount testing mechanism.
The air supply system is used for providing dry clean air with a certain pressure for the flow test mechanism and the leakage test mechanism. The air supply mechanism includes an air source 11, a first air tank 21, a dryer 13, a filter 15, a second shut-off valve 32, a third shut-off valve 33, and a main line 40. The inlet of the main conduit 40 communicates with the outlet of the air source 11, the outlet of the main conduit 40 constituting the outlet of the air supply mechanism. The first air tank 21, the dryer 13, the filter 15, the second shut-off valve 32, and the third shut-off valve 33 are disposed in this order on the main line 40 in the gas delivery direction.
In this embodiment, the air source is an air compressor. The air compressor 11 compresses the sucked normal pressure air to generate high pressure air. The first air tank 21 is used for guaranteeing the air pressure in the pipeline to be stable. The dryer 13 dries the compressed air to remove moisture from the compressed air. The filter 15 finely filters the compressed air. The second shut-off valve 32 and the third shut-off valve 33 are used to control the compressed air supply of the whole test device. In the present embodiment, the second shut-off valve 32 is a ball valve, and the third shut-off valve 33 is a solenoid valve, but is not limited thereto.
The flow testing mechanism is used for measuring the flow (steady-state flow) of the electronic control gas injection valve when the electronic control gas injection valve is fully opened and the flow (dynamic flow) of the gas injection valve when the electronic control gas injection valve is in normal operation, so that the consistency and stability requirements of the gas injection valve are evaluated. The flow rate testing mechanism comprises a first branch pipeline 41, a second branch pipeline 42, a first pressure regulating valve 51, a buffer 61, a first flow meter 71, a first pressure sensor 81, a second pressure sensor 82 and a first station 91 for placing an electric control gas injection valve to be tested. The inlet of the first branch pipe 41 communicates with the outlet of the air supply mechanism, and a first pressure regulating valve 51 is provided on the first branch pipe 41, the outlet of the first branch pipe 41 being for communicating with the gas inlet of the electrically controlled gas injection valve placed on the first station table 91. The first pressure sensor 81 is provided on the first branch line 41 between the first pressure regulating valve 51 and the outlet of the first branch line 41. The inlet of the second branch pipe 42 is for communicating with the gas outlet of the electronically controlled gas injection valve placed on the first station table 91, and the second pressure sensor 82, the buffer 61, and the first flowmeter 71 are sequentially disposed on the second branch pipe 42 in the gas conveying direction.
Optionally, the flow testing mechanism includes a muffler 63 and the second air reservoir 22. A muffler 63 is provided at the outlet end of the second branch pipe 42, the muffler 63 being used to reduce air noise. The inlet of the second air tank 22 communicates with a pipe section between the first pressure regulating valve 51 and the outlet of the first branch pipe 41. The second air tank 22 is used for ensuring the air pressure passing through the tested electric control fuel gas injection valve to be stable.
Optionally, the flow testing mechanism further includes a fourth stop valve 34, and the fourth stop valve 34 is disposed on the first branch pipe 41 and located between the inlet of the first branch pipe 41 and the first pressure regulating valve 51. In the present embodiment, the fourth shut-off valve 34 is a solenoid valve.
The leakage amount testing mechanism is used for measuring the leakage amount between valve discs when the electric control fuel gas injection valve is closed and the leakage amount on the surface of the valve body. The leakage amount testing mechanism comprises a third branch pipe 43, a fourth branch pipe 44, a second pressure regulating valve 52, a first stop valve 31, a second flowmeter 72, a third pressure sensor 83 and a second station 92 for placing an electrically controlled gas injection valve to be tested. The inlet of the third branch pipe 43 is communicated with the outlet of the air supply mechanism, the second pressure regulating valve 52 is arranged on the third branch pipe 43, and the outlet of the third branch pipe 43 is used for communicating with the gas inlet of the electric control gas injection valve arranged on the second station 92. The first shut-off valve 31 and the second flowmeter 72 are disposed in this order on the fourth branch line 44 in the gas conveying direction. The third pressure sensor 83 is provided on the third branch line 43 or the fourth branch line 44; when the third pressure sensor 83 is provided in the third branch line 43, the third pressure sensor 83 is located between the second pressure regulating valve 52 and the outlet of the third branch line 43, and when the third pressure sensor 83 is provided in the fourth branch line 84, the third pressure sensor 83 is located between the inlet of the fourth branch line 44 and the first shutoff valve 31.
Optionally, the leakage amount testing mechanism includes a fifth shut-off valve 35, the fifth shut-off valve 35 being provided on the third branch line 43 and being located between the inlet of the third branch line 43 and the second pressure regulating valve 53. In the embodiment, the fifth shut-off valve 35 is a solenoid valve, and the first shut-off valve 31 is a ball valve.
Further, the leakage amount testing mechanism includes a check valve 65, and the check valve 65 is disposed on the third branch line 43 and between the second pressure regulating valve 52 and the outlet of the third branch line 43. The check valve 65 allows only the gas to flow from the outlet of the second pressure regulating valve 52 to the outlet of the third branch pipe 43 without flowing back.
In this embodiment, the flow test mechanism and the leak test mechanism are provided on a test-device test stand of steel construction.
According to another aspect of the embodiment of the invention, a testing method adopting the testing device of the electric control gas injection valve of the gas engine is also disclosed.
The process for testing the steady-state flow and the dynamic flow of the electric control gas injection valve by using the electric control gas injection valve testing device of the gas engine is as follows:
Placing the electric control gas injection valve 100 to be tested on the first station table 91, and connecting a gas inlet and a gas outlet of the electric control gas injection valve 100 with an outlet of the first branch pipeline 41 and an inlet of the second branch pipeline 42 respectively;
Controlling the electric control gas injection valve 100 to be in a normally open state, inputting gas to the electric control gas injection valve 100 through an air supply mechanism, adjusting the first pressure regulating valve 51 to enable the difference between the detection value of the first pressure sensor 81 and the detection value of the second pressure sensor 82 to reach a first differential pressure set value, keeping a first set time, recording the flow measurement value of the first flowmeter 71, and taking the recorded flow measurement value as the steady-state flow of the electric control gas injection valve;
the electronically controlled gas injection valve 100 is controlled to be in a normal operation state, the difference between the detection value detected by the first pressure sensor 81 and the detection value detected by the second pressure sensor 82 is made to reach a second differential pressure set value by adjusting the first pressure regulating valve 51, the second set time is maintained, the flow measurement value of the first flow meter 71 is recorded, and the recorded flow measurement value is used as the dynamic flow of the electronically controlled gas injection valve.
The control of the electrically controlled gas injection valve can be achieved by a self-contained controller of the electrically controlled gas injection valve. The electronic control gas injection valve is in a normal working state, namely the electronic control gas injection valve is repeatedly opened and closed according to a certain frequency, and the switching frequency is related to the type of the electronic control gas valve. In a specific embodiment, the switching frequency is, for example, 9Hz. When measuring the dynamic flow, the buffer 61 can function to convert the dynamic flow of the electronically controlled gas injection valve 100 into a steady-state flow for measurement. By measuring the steady-state flow and the dynamic flow of the electronically controlled gas injection valve 100 a plurality of times, the stability of the electronically controlled gas injection valve 100 can be qualitatively assessed; by replacing the electrically controlled gas injection valve to be tested, the consistency of the electrically controlled gas injection valve can be qualitatively assessed.
The specific values of the first differential pressure set point, the second differential pressure set point, the first set time and the second set time are determined according to the model of the electric control gas injection valve 100 to be tested. In a specific application example, the first differential pressure set value and the second differential pressure set value are both 1 atm, and the first set time and the second set time are both 1 minute, but not limited thereto, and in other embodiments, the first differential pressure set value and the second differential pressure set value are not equal in size, and the first set time and the second set time are also different in length.
The process for testing the leakage quantity between valve discs and the leakage quantity on the surface of the valve body of the electric control gas injection valve by using the electric control gas injection valve testing device of the gas engine comprises the following steps:
Placing the electric control gas injection valve 200 to be tested on the second station platform 92, and connecting a gas inlet and a gas outlet of the electric control gas injection valve 200 with an outlet of the third branch pipeline 43 and an inlet of the fourth branch pipeline 44 respectively;
controlling the electric control gas injection valve 200 to be in a closed state, opening the first stop valve 31, inputting gas to the electric control gas injection valve 200 through the air supply mechanism, adjusting the second pressure regulating valve 52 to enable the inlet pressure of the electric control gas injection valve 200 to reach a preset first test pressure, recording the flow measurement value of the second flowmeter 72, and taking the recorded flow measurement value of the second flowmeter as the leakage quantity between valve discs when the electric control gas injection valve is closed;
The second pressure regulating valve 52 is adjusted so that the inlet pressure of the electric control gas injection valve 200 reaches a predetermined second test pressure, the second test pressure is greater than the first test pressure, the second pressure regulating valve 52 and the first shut-off valve 31 are closed, the pressure drop rate is calculated according to the pressure measurement value of the third pressure sensor 83, and the pressure drop rate is used as an evaluation index of the leakage amount of the valve body surface of the electric control gas injection valve.
The pressure drop rate may be an instantaneous pressure drop rate or an average pressure drop rate, and the present application is not limited thereto. For example, immediately after the second pressure regulating valve 52 and the first shut-off valve 31 are closed, the pressure measurement value of the third pressure sensor 83 is recorded, and then after a predetermined time t1 (for example, 30 minutes) has elapsed, the pressure measurement value of the third pressure sensor 83 is recorded again, and the quotient of the difference between the two pressure measurement values and t1 is taken as the pressure drop rate as an evaluation index of the valve body surface leakage amount of the electronically controlled gas injection valve. For another example, after the second pressure regulating valve 52 and the first shut-off valve 31 are closed, the pressure measurement value of the third pressure sensor 83 is recorded immediately, and then, every predetermined time t2 (for example, 10 minutes) elapses, the pressure measurement value of the pressure sensor 83 is recorded once, and n+1 times in total, n being a positive integer of 2 or more. Each time t2 corresponds to a pressure drop rate, and the average pressure drop rate obtained by dividing the sum of n pressure drop rates by n is used as an evaluation index of the leakage amount of the valve body surface of the electric control gas injection valve. The faster the pressure drop rate, the greater the amount of gas leakage from the surface of the valve body.
The magnitudes of the first test pressure and the second test pressure are dependent on the model of the electrically controlled gas injection valve 100 to be tested. In one specific example of application, the first test pressure is 2 atmospheres and the second test pressure is 5 atmospheres.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. The device for testing the electric control gas injection valve of the gas engine is characterized by comprising an air supply mechanism, a flow testing mechanism and a leakage testing mechanism;
The flow testing mechanism comprises a first branch pipeline, a second branch pipeline, a first pressure regulating valve, a buffer, a first flowmeter, a first pressure sensor, a second pressure sensor, a silencer, a second air storage tank, a fourth stop valve and a first station platform for placing an electric control fuel gas injection valve to be tested; the inlet of the first branch pipeline is communicated with the outlet of the air supply mechanism, the first pressure regulating valve is arranged on the first branch pipeline, and the outlet of the first branch pipeline is used for being communicated with the gas inlet of the electric control gas injection valve arranged on the first station platform; the first pressure sensor is arranged on the first branch pipeline and is positioned between the first pressure regulating valve and the outlet of the first branch pipeline; the inlet of the second branch pipeline is used for being communicated with a gas outlet of an electric control gas injection valve arranged on the first station platform, and the second pressure sensor, the buffer and the first flowmeter are sequentially arranged on the second branch pipeline along the gas conveying direction; the silencer is arranged at the outlet end of the second branch pipeline; the inlet of the second air storage tank is communicated with a pipe section between the first pressure regulating valve and the outlet of the first branch pipeline; the fourth stop valve is arranged on the first branch pipeline and is positioned between the inlet of the first branch pipeline and the first pressure regulating valve;
The leakage quantity testing mechanism comprises a third branch pipeline, a fourth branch pipeline, a second pressure regulating valve, a first stop valve, a fifth stop valve, a second flowmeter, a third pressure sensor and a second station platform for placing an electric control gas injection valve to be tested; the inlet of the third branch pipeline is communicated with the outlet of the air supply mechanism, the second pressure regulating valve is arranged on the third branch pipeline, and the outlet of the third branch pipeline is used for being communicated with the gas inlet of the electric control gas injection valve arranged on the second station platform; the first stop valve and the second flowmeter are sequentially arranged on the fourth branch pipeline along the gas conveying direction; the third pressure sensor is arranged on a third branch pipeline or a fourth branch pipeline; when the third pressure sensor is arranged in the third branch pipeline, the third pressure sensor is positioned between the second pressure regulating valve and the outlet of the third branch pipeline, and when the third pressure sensor is arranged in the fourth branch pipeline, the third pressure sensor is positioned between the inlet of the fourth branch pipeline and the first stop valve; the fifth stop valve is arranged on the third branch pipeline and is positioned between the inlet of the third branch pipeline and the second pressure regulating valve;
The air supply mechanism comprises an air source, a second stop valve and a main pipeline; the inlet of the main pipeline is communicated with the outlet of the air source, and the outlet of the main pipeline forms the outlet of the air supply mechanism; the second stop valve is arranged on the main pipeline;
controlling the electric control gas injection valve to be in a normally open state, inputting gas to the electric control gas injection valve through the air supply mechanism, enabling the difference between the detection value of the first pressure sensor and the detection value of the second pressure sensor to reach a first differential pressure set value through adjusting the first pressure regulating valve, keeping a first set time, recording the flow measurement value of the first flowmeter, and taking the recorded flow measurement value as the steady-state flow of the electric control gas injection valve;
And controlling the electric control gas injection valve to be in a normal working state, enabling the difference between the detection value detected by the first pressure sensor and the detection value detected by the second pressure sensor to reach a second differential pressure set value by adjusting the first pressure regulating valve, keeping a second set time, recording the flow measurement value of the first flowmeter, and taking the recorded flow measurement value as the dynamic flow of the electric control gas injection valve.
2. The gas engine electronically controlled gas injection valve testing apparatus of claim 1, wherein said air supply mechanism comprises a first air reservoir, a dryer, a filter, and a third shut-off valve; the first air storage tank, the dryer, the filter, the second stop valve and the third stop valve are sequentially arranged on the main pipeline along the gas conveying direction;
The air source is an air compressor.
3. The gas engine electrically controlled gas injection valve testing device of claim 1, wherein the leakage amount testing mechanism comprises a one-way valve disposed on the third branch line between the second pressure regulating valve and the outlet of the third branch line; the one-way valve only allows gas to flow from the outlet of the second pressure regulating valve to the outlet of the third branch line without backflow.
4. The method for testing an electronically controlled gas injection valve test apparatus for a gas engine of claim 1, comprising the steps of:
placing an electric control gas injection valve to be tested on the first station table, and connecting a gas inlet and a gas outlet of the electric control gas injection valve with an outlet of a first branch pipeline and an inlet of a second branch pipeline respectively;
controlling the electric control gas injection valve to be in a normally open state, inputting gas to the electric control gas injection valve through the air supply mechanism, enabling the difference between the detection value of the first pressure sensor and the detection value of the second pressure sensor to reach a first differential pressure set value through adjusting the first pressure regulating valve, keeping a first set time, recording the flow measurement value of the first flowmeter, and taking the recorded flow measurement value as the steady-state flow of the electric control gas injection valve;
controlling the electric control gas injection valve to be in a normal working state, enabling the difference between the detection value detected by the first pressure sensor and the detection value detected by the second pressure sensor to reach a second differential pressure set value by adjusting the first pressure regulating valve, keeping a second set time, recording the flow measurement value of the first flowmeter, and taking the recorded flow measurement value as the dynamic flow of the electric control gas injection valve;
Placing an electric control gas injection valve to be tested on the second station table, and connecting a gas inlet and a gas outlet of the electric control gas injection valve with an outlet of a third branch pipeline and an inlet of a fourth branch pipeline respectively;
Controlling the electric control gas injection valve to be in a closed state, opening the first stop valve, inputting gas to the electric control gas injection valve through the air supply mechanism, enabling the inlet pressure of the electric control gas injection valve to reach a preset first test pressure through adjusting the second pressure regulating valve, recording the flow measurement value of the second flowmeter, and taking the recorded flow measurement value of the second flowmeter as the leakage quantity between valve discs when the electric control gas injection valve is closed;
And adjusting a second pressure regulating valve to enable the inlet pressure of the electric control gas injection valve to reach a preset second test pressure, wherein the second test pressure is larger than the first test pressure, closing the second pressure regulating valve and the first stop valve, calculating the pressure drop rate according to the pressure measured value of the third pressure sensor, and taking the pressure drop rate as an evaluation index of the surface leakage of the valve body of the electric control gas injection valve.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1179879A (en) * | 1966-04-27 | 1970-02-04 | Luedi Ag R | Method of and Apparatus for Testing the Fluid-Tightness of Two Series-Connected Shut-Off Valves in a System |
| EP0341323A1 (en) * | 1988-05-07 | 1989-11-15 | Honeywell B.V. | Apparatus for regulating a gas burner |
| CN101183036A (en) * | 2007-12-13 | 2008-05-21 | 广州市煤气公司 | Gas valve online quick-speed leak detection method |
| KR101494167B1 (en) * | 2013-10-15 | 2015-02-17 | 한전케이피에스 주식회사 | Test Equipment for Air Solenoid Valve |
| CN105051354A (en) * | 2013-03-26 | 2015-11-11 | 日立汽车系统株式会社 | Device for controlling fuel injection valve |
| CN105352682A (en) * | 2015-12-14 | 2016-02-24 | 上海雷尼威尔物联网有限公司 | Gas dispenser valve detection device |
| CN105444969A (en) * | 2015-12-30 | 2016-03-30 | 慈溪市天行电器有限公司 | Machine for testing automatic operation performance and leakage of fuel gas solenoid valve |
| CN105628313A (en) * | 2015-12-30 | 2016-06-01 | 慈溪市天行电器有限公司 | Gas electromagnetic valve automatic actuation performance and leakage test method |
| CN106525395A (en) * | 2016-10-12 | 2017-03-22 | 中国船舶重工集团公司第七研究所 | Testing stand for testing large power natural gas injection valve |
| CN108301951A (en) * | 2018-01-22 | 2018-07-20 | 哈尔滨工程大学 | Measure the device and its test method of natural gas engine gas jet law |
| CN108317032A (en) * | 2018-01-22 | 2018-07-24 | 哈尔滨工程大学 | A kind of experimental rig and method measuring natural gas engine gas emitted dose |
| CN108332958A (en) * | 2018-01-11 | 2018-07-27 | 湖北三江航天红峰控制有限公司 | A kind of multifunction electromagnetic pneumatic stopping valve testing stand |
| CN208705036U (en) * | 2018-09-21 | 2019-04-05 | 中国船舶重工集团公司第七一一研究所 | Gas engine electric-controlled gas sprays valve test device |
-
2018
- 2018-09-21 CN CN201811110842.7A patent/CN109000918B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1179879A (en) * | 1966-04-27 | 1970-02-04 | Luedi Ag R | Method of and Apparatus for Testing the Fluid-Tightness of Two Series-Connected Shut-Off Valves in a System |
| EP0341323A1 (en) * | 1988-05-07 | 1989-11-15 | Honeywell B.V. | Apparatus for regulating a gas burner |
| CN101183036A (en) * | 2007-12-13 | 2008-05-21 | 广州市煤气公司 | Gas valve online quick-speed leak detection method |
| CN105051354A (en) * | 2013-03-26 | 2015-11-11 | 日立汽车系统株式会社 | Device for controlling fuel injection valve |
| KR101494167B1 (en) * | 2013-10-15 | 2015-02-17 | 한전케이피에스 주식회사 | Test Equipment for Air Solenoid Valve |
| CN105352682A (en) * | 2015-12-14 | 2016-02-24 | 上海雷尼威尔物联网有限公司 | Gas dispenser valve detection device |
| CN105444969A (en) * | 2015-12-30 | 2016-03-30 | 慈溪市天行电器有限公司 | Machine for testing automatic operation performance and leakage of fuel gas solenoid valve |
| CN105628313A (en) * | 2015-12-30 | 2016-06-01 | 慈溪市天行电器有限公司 | Gas electromagnetic valve automatic actuation performance and leakage test method |
| CN106525395A (en) * | 2016-10-12 | 2017-03-22 | 中国船舶重工集团公司第七研究所 | Testing stand for testing large power natural gas injection valve |
| CN108332958A (en) * | 2018-01-11 | 2018-07-27 | 湖北三江航天红峰控制有限公司 | A kind of multifunction electromagnetic pneumatic stopping valve testing stand |
| CN108301951A (en) * | 2018-01-22 | 2018-07-20 | 哈尔滨工程大学 | Measure the device and its test method of natural gas engine gas jet law |
| CN108317032A (en) * | 2018-01-22 | 2018-07-24 | 哈尔滨工程大学 | A kind of experimental rig and method measuring natural gas engine gas emitted dose |
| CN208705036U (en) * | 2018-09-21 | 2019-04-05 | 中国船舶重工集团公司第七一一研究所 | Gas engine electric-controlled gas sprays valve test device |
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