CN212155023U - Test platform - Google Patents
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- CN212155023U CN212155023U CN202020472069.5U CN202020472069U CN212155023U CN 212155023 U CN212155023 U CN 212155023U CN 202020472069 U CN202020472069 U CN 202020472069U CN 212155023 U CN212155023 U CN 212155023U
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 238000002347 injection Methods 0.000 claims abstract description 235
- 239000007924 injection Substances 0.000 claims abstract description 235
- 230000001105 regulatory effect Effects 0.000 claims abstract description 123
- 238000004891 communication Methods 0.000 claims description 20
- 238000011144 upstream manufacturing Methods 0.000 claims description 15
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 230000002829 reductive effect Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 291
- 239000000567 combustion gas Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 15
- 239000002737 fuel gas Substances 0.000 description 12
- 239000000446 fuel Substances 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000012937 correction Methods 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
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005293 physical law Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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Abstract
The utility model discloses a test platform. The test platform is used for testing the gas injection valve, and the test platform includes main air-vent valve, choke valve and backpressure regulating valve, and the main air-vent valve is used for adjusting the inlet pressure of the gas that gets into the gas injection valve, and the choke valve is used for adjusting the exit pressure of following the gas injection valve combustion gas, and the backpressure regulating valve is parallelly connected with the gas injection valve, and is located the low reaches of main air-vent valve, and the entry end of backpressure regulating valve is linked together with the entry end of gas injection valve, and the exit end of backpressure regulating valve communicates with the exit end of gas injection valve and the entry end. According to the utility model discloses a test platform, test platform are used for testing the gas injection valve, and the backpressure governing valve is parallelly connected with the gas injection valve, can measure the jet flow of gas injection valve when different inlet pressure and backpressure for the jet flow of gas injection valve is more accurate, optimizes complete machine thermal efficiency and discharges the index.
Description
Technical Field
The utility model relates to the technical field of engines, particularly to a test platform.
Background
With the gradual deterioration of the global environment and the gradual enhancement of the environmental awareness of people, the rapid development of the ship engine powered by liquefied natural gas is driven to adapt to the increasingly strict requirements of maritime environmental regulations. The engine includes a gas injection valve for injecting gas into an intake manifold or cylinder. The existing test platform can perform function test on the gas injection valve, for example, the starting and stopping functions of the gas injection valve for the low-speed machine can be detected, and the fault of the gas injection valve after installation is reduced. However, the existing test platform can not well simulate the actual working environment of the gas injection valve, and the tested test value is easy to have errors.
Therefore, there is a need to provide a test platform to at least partially address the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
In order to solve the above problem at least partially, according to a first aspect of the present invention, there is provided a test platform for testing a gas injection valve, the test platform comprising:
a main pressure regulating valve disposed upstream of the gas injection valve for regulating an inlet pressure of gas entering the gas injection valve;
a throttle valve provided downstream of the gas injection valve for adjusting an outlet pressure of the gas discharged from the gas injection valve; and
the back pressure regulating valve is connected with the gas injection valve in parallel and is positioned at the downstream of the main pressure regulating valve, the inlet end of the back pressure regulating valve is communicated with the inlet end of the gas injection valve, and the outlet end of the back pressure regulating valve is communicated with the outlet end of the gas injection valve and the inlet end of the throttle valve.
According to the utility model discloses a test platform, test platform is used for testing the gas injection valve, the backpressure governing valve is parallelly connected with the gas injection valve, and be located the low reaches of main air-vent valve, the backpressure of gas injection valve can be adjusted jointly to backpressure governing valve and choke valve, for the gas injection valve produces stably in injection characteristic is experimental, adjustable back pressure in the valve, thereby make the gas injection valve test in the environment of backpressure, measure the jet flow of gas injection valve when different inlet pressure and backpressure, make the jet flow of gas injection valve more accurate, optimize complete machine thermal efficiency and discharge index.
Optionally, the throttle valve is configured to be adjustable such that
When the opening degree of the throttle valve is reduced, the outlet pressure of the gas discharged by the gas injection valve is increased; and/or
When the opening degree of the throttle valve is increased, the outlet pressure of the gas discharged from the gas injection valve is decreased.
Thereby, the outlet pressure value of the gas injection valve can be adjusted.
Optionally, the main pressure regulating valve comprises a primary pressure regulating valve disposed upstream of the gas injection valve to reduce the pressure of the gas.
Optionally, the main pressure regulating valve further comprises a secondary pressure regulating valve disposed between the primary pressure regulating valve and the gas injection valve to regulate the pressure of the gas discharged by the primary pressure regulating valve to the inlet pressure.
Optionally, the fuel gas injection valve further comprises a flow meter, an inlet end of the flow meter is communicated with an inlet end of the back pressure regulating valve, an outlet end of the flow meter is communicated with an inlet end of the fuel gas injection valve, and the flow meter is used for measuring the mass flow of the gas entering the fuel gas injection valve.
Optionally, the gas injection valve further comprises a first pressure sensor, the first pressure sensor is arranged between the gas injection valve and the flow meter, and the first pressure sensor is used for measuring the inlet pressure of the gas entering the gas injection valve.
Optionally, the gas injection valve further comprises a second pressure sensor arranged between the throttle valve and the gas injection valve for measuring an outlet pressure of the gas discharged by the gas injection valve.
Optionally, the gas injection valve further comprises a temperature sensor, the temperature sensor is arranged between the gas injection valve and the flow meter, and the temperature sensor is used for measuring the temperature of the gas.
Optionally, the system further comprises a data acquisition and processing device, and the data acquisition and processing device is electrically connected with the flow meter, the first pressure sensor, the second pressure sensor and the temperature sensor respectively. The sensor is used for recording flow values under different pressures before and after the valve so as to master the complete injection characteristic of the gas injection valve.
Optionally, the fuel injection valve and/or the back pressure regulating valve are arranged upstream of the fuel injection valve and/or the back pressure regulating valve.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings embodiments of the invention and the description thereof for the purpose of illustrating the devices and principles of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic diagram of a preferred embodiment according to the present invention.
Description of reference numerals:
1: a gas storage device; 2: filter
3: first on-off valve 4: first-stage pressure regulating valve
5: second on-off valve 6: two-stage pressure regulating valve
7: and (4) flow meter 8: third cut-off valve
9: first pressure sensor 10: temperature sensor
11: gas injection valve 12: protective cover
13: second pressure sensor 14: throttle valve
15: the muffler 16: fourth break valve
17: back pressure regulating valve 18: collection card
19: industrial control machine
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The present invention is described in detail below with reference to the preferred embodiments, however, the present invention can have other embodiments in addition to the detailed description, and should not be construed as being limited to the embodiments set forth herein.
It is to be understood that the terms "a," "an," and "the" as used herein are intended to describe specific embodiments only and are not to be taken as limiting the invention, which is intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for illustrative purposes only and are not limiting.
Ordinal words such as "first" and "second" are referred to in this application as labels only, and do not have any other meanings, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".
Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present invention and do not limit the present invention.
The utility model provides a test platform for test the gas injection valve, preferably, test platform can be used for testing the gas injection valve of gas engine or dual fuel engine. The test platform can provide the test environment of backpressure for the gas injection valve to guarantee the accuracy of experimental value.
The specific structure of the test platform is described below with reference to fig. 1.
The test platform can deliver gas to the gas injection valve 11 to be tested. In particular, the test platform may comprise a gas storage device 1 for storing gas in the gas storage device 1. The gas storage device 1 may be in fluid communication with a gas injection valve 11 to be tested, and the gas storage device 1 may deliver gas to the gas injection valve 11. The gas storage device 1 may be configured as a compressed gas tank and the gas may be a gas to further conform to the actual operating state of the gas injection valve 11. Preferably, the gas may be a high-pressure gas, so as to adjust the pressure of the gas entering the gas injection valve 11 later.
The test platform further comprises a filter 2, the filter 2 being arranged downstream of the gas storage device 1 and upstream of the gas injection valve 11, i.e. the filter 2 is arranged between the gas storage device 1 and the gas injection valve 11. The inlet end of the filter 2 is in fluid communication with the outlet end of the gas storage device 1, and the outlet end of the filter 2 is in fluid communication with the inlet end of the gas injection valve 11. The gas can enter the gas injection valve 11 via the filter 2. The filter 2 may filter gas exhausted from the gas storage device 1, and in particular, the filter 2 may filter particulate matter in the pipeline. Gas can enter the gas injection valve 11 via the filter 2. In this way, the gas injection valve 11 can be protected from being damaged by impurities.
The test platform further comprises a first on-off valve 3, the first on-off valve 3 being arranged downstream of the filter 2 and upstream of the gas injection valve 11, i.e. the first on-off valve 3 is arranged between the filter 2 and the gas injection valve 11. The inlet end of the first on-off valve 3 is in fluid communication with the outlet end of the filter 2, and the outlet end of the first on-off valve 3 is in communication with the inlet end of the gas injection valve 11. Gas can enter the gas injection valve 11 via the first shut-off valve 3. The first on-off valve 3 opens or closes a gas flow path.
The test platform further comprises a main pressure regulating valve which is arranged downstream of the first on-off valve 3 and upstream of the gas injection valve 11, i.e. the main pressure regulating valve is arranged between the first on-off valve 3 and the gas injection valve 11. The inlet end of the main pressure regulating valve is in fluid communication with the outlet end of the first on-off valve 3, and the outlet end of the main pressure regulating valve is in fluid communication with the inlet end of the gas injection valve 11. Gas can enter the gas injection valve 11 via the main pressure regulating valve. The main pressure regulating valve can regulate the inlet pressure of the gas entering the gas injection valve 11, so that the inlet pressure of the gas entering the gas injection valve 11 can be regulated to different values, a plurality of test values of the plurality of gas injection valves 11 are obtained, the test environment of the gas injection valves 11 is closer to the actual working environment, and the complete injection characteristic of the gas injection valves 11 is mastered. "inlet pressure of gas entering the gas injection valve 11" refers to the pressure of gas entering the gas injection valve 11.
Specifically, the primary pressure regulating valve includes a primary pressure regulating valve 4, and the primary pressure regulating valve 4 is disposed downstream of the first on-off valve 3 and upstream of the gas injection valve 11, i.e., the primary pressure regulating valve 4 is disposed between the first on-off valve 3 and the gas injection valve 11. The inlet end of the primary pressure regulating valve 4 is in fluid communication with the outlet end of the first on-off valve 3, and the outlet end of the primary pressure regulating valve 4 is in communication with the inlet end of the gas injection valve 11. Gas can be fed into the gas injection valve 11 via the primary pressure regulating valve 4. The primary pressure-regulating valve 4 may reduce the pressure of the high-pressure gas discharged from the gas storage device 1, thereby decompressing the gas such that the pressure value of the gas approaches a preset pressure value.
The test platform further comprises a second on-off valve 5, the second on-off valve 5 is arranged at the downstream of the primary pressure regulating valve 4 and at the upstream of the gas injection valve 11, namely the second on-off valve 5 is arranged between the primary pressure regulating valve 4 and the gas injection valve 11. The inlet end of the second on-off valve 5 is communicated with the outlet end of the primary pressure regulating valve 4 in a fluid mode, and the outlet end of the second on-off valve 5 is communicated with the inlet end of the fuel gas injection valve 11. Gas can enter the gas injection valve 11 via the second shut-off valve 5. The second cut-off valve 5 may be used for the primary pressure-regulating valve 4 to be constant in pressure so that the pressure of the gas discharged from the primary pressure-regulating valve 4 is maintained at a constant value.
The main pressure regulating valve also comprises a secondary pressure regulating valve 6, the secondary pressure regulating valve 6 being arranged downstream of the second shut-off valve 5 and upstream of the gas injection valve 11, i.e. the secondary pressure regulating valve 6 is arranged between the second shut-off valve 5 and the gas injection valve 11. The inlet end of the secondary pressure regulating valve 6 is in fluid communication with the outlet end of the second cut-off valve 5, and the outlet end of the secondary pressure regulating valve 6 is in communication with the inlet end of the fuel gas injection valve 11. Gas can be admitted into the gas injection valve 11 via the secondary pressure regulating valve 6. The secondary pressure regulating valve 6 can regulate the pressure of the gas discharged from the primary pressure regulating valve 4 to the inlet pressure into the gas injection valve 11. The inlet pressure of the gas discharged from the secondary pressure regulating valve 6 may be a predetermined pressure value. Preferably, the secondary pressure-regulating valve 6 may further reduce the pressure of the high-pressure gas discharged from the primary pressure-regulating valve 4, thereby decompressing the gas such that the pressure value of the gas is adjusted to a preset pressure value.
The test platform further comprises a third cut-off valve 8, wherein the third cut-off valve 8 is arranged at the downstream of the secondary pressure regulating valve 6 and at the upstream of the fuel injection valve 11, namely the third cut-off valve 8 is arranged between the secondary pressure regulating valve 6 and the fuel injection valve 11. The inlet end of the third stop valve 8 is communicated with the outlet end of the second-stage pressure regulating valve 6, and the outlet end of the third stop valve 8 is communicated with the inlet end of the fuel gas injection valve 11. Gas can enter the gas injection valve 11 via the third shut-off valve 8.
Further, the first on-off valve is closed when the gas is charged into the gas storage device. When the gas in the gas storage device is adjusted to a first preset pressure, the first on-off valve is opened, the second on-off valve is closed, and the gas enters the primary pressure regulating valve. The primary pressure regulating valve regulates the pressure of the gas to a second predetermined pressure. When the pressure of the gas is regulated to a second preset pressure, the second on-off valve is opened, the third on-off valve is closed, and the gas enters the secondary pressure regulating valve. The secondary pressure regulating valve regulates the pressure of the gas to a third predetermined pressure, i.e., the inlet pressure of the gas injection valve. When the pressure of the gas is adjusted to a third predetermined pressure, the third shut-off valve is opened.
The test platform also comprises a throttle valve 14, the throttle valve 14 being arranged downstream of the gas injection valve 11. The inlet end of the throttle valve 14 is in fluid communication with the outlet end of the gas injection valve 11, and gas can enter the throttle valve 14 via the gas injection valve 11. The throttle valve 14 can adjust the outlet pressure of the gas discharged from the gas injection valve 11. Preferably, the throttle valve 14 can be adjusted, thereby adjusting the back pressure of the gas injection valve 11. That is, the throttle valve 14 can regulate the pressure of the gas, and the pressure of the gas regulated by the throttle valve 14 is inversely applied to the gas injection valve 11, thereby forming a back pressure of the gas injection valve 11, thereby affecting the mass flow rate of the gas injection valve 11.
In order to obtain the data relating to the gas injection valve 11 accurately, the test platform further comprises a flow meter 7, the flow meter 7 being arranged upstream of the gas injection valve 11. The inlet end of the flow meter 7 is in fluid communication with the outlet end of the main pressure regulating valve (secondary pressure regulating valve 6), and the outlet end of the flow meter 7 is in fluid communication with the inlet end of the gas injection valve 11. The flow meter 7 is used to measure the mass flow of gas entering the gas injection valve 11, thereby measuring the injection flow of the gas injection valve 11.
The test platform further comprises a first pressure sensor 9, the first pressure sensor 9 being arranged between the gas injection valve 11 and the flow meter 7. In this way, the first pressure sensor 9 can measure the inlet pressure of the gas entering the gas injection valve 11. The test platform further comprises a temperature sensor 10, the temperature sensor 10 being arranged between the gas injection valve 11 and the first pressure sensor 9. In this way, the temperature sensor 10 can measure the temperature of the gas entering the gas injection valve 11.
The test platform further comprises a second pressure sensor 13, the second pressure sensor 13 being arranged between the throttle valve 14 and the gas injection valve 11. The second pressure sensor 13 may measure the outlet pressure of the gas discharged from the gas injection valve 11.
In this way, the flow rate of the gas can be jointly detected by combining the inlet pressure, the outlet pressure and the temperature of the gas injection valve, so that the mass flow rate of the gas can be comprehensively evaluated.
The throttle valve 14 may be configured as a ball valve, a stop valve, or a butterfly valve. Specifically, the throttle valve 14 is configured to be adjustable such that the outlet pressure discharged from the gas injection valve 11 increases as the opening degree of the throttle valve 14 decreases. Thereby, the outlet pressure value of the gas injection valve 11 can be obtained, and the mass flow rate of the gas injection valve 11 can be obtained.
Of course, the throttle valve 14 is configured to be adjustable such that the outlet pressure discharged from the gas injection valve 11 is reduced as the opening degree of the throttle valve 14 is increased. In this way, the inlet pressure and the outlet pressure of the gas injection valve 11 can be adjusted separately and without affecting each other. The gas inlet pressure of the gas injection valve 11 can be adjusted by the main pressure regulating valve, and the gas outlet pressure of the gas injection valve 11 can be adjusted by the throttle valve, so that the gas pressure can be adjusted in multiple stages, and different flow values can be measured under the conditions of different pre-valve pressures and post-valve pressures.
The throttle valve 14 can roughly adjust the back pressure of the gas injection valve 11, and the test platform further comprises a back pressure adjusting valve 17, wherein the back pressure adjusting valve 17 is connected with the gas injection valve 11 in parallel and is positioned at the downstream of the main pressure adjusting valve (the primary pressure adjusting valve 4 and the secondary pressure adjusting valve 6) to realize the fine adjustment of the back pressure of the gas injection valve 11. The back pressure regulating valve 17 is connected in parallel with the gas injection valve 11, and the pressure value of the gas after the back pressure regulating valve 17 is equal to the pressure value of the gas after the gas injection valve 11.
The inlet end of the back pressure regulating valve 17 is communicated with the inlet end of the fuel gas injection valve 11, and the outlet end of the back pressure regulating valve 17 is communicated with both the outlet end of the fuel gas injection valve 11 and the inlet end of the throttle valve 14. Specifically, the inlet end of the back pressure regulating valve 17 may be in fluid communication with the outlet end of the secondary pressure regulating valve 6, i.e. the outlet end of the secondary pressure regulating valve 6 is in communication with both the inlet end of the back pressure regulating valve 17 and the inlet end of the gas injection valve 11. The inlet pressure of the gas entering the back pressure regulating valve 17 may be equal to the inlet pressure of the gas entering the gas injection valve 11. I.e., the pressure of the gas entering the back pressure regulating valve is equal to the pressure of the gas entering the gas injection valve 11. The gas from the secondary pressure regulating valve 6 can enter the gas injection valve 11 and the back pressure regulating valve 17, respectively.
The outlet end of the back pressure regulating valve 17 may communicate with the outlet end of the gas injection valve 11, and the inlet end of the throttle valve 14 communicates with both the outlet end of the back pressure regulating valve 17 and the outlet end of the gas injection valve 11. The outlet pressure of the gas discharged from the back pressure regulating valve 17 may be equal to the outlet pressure of the gas discharged from the gas injection valve 11. That is, the pressure of the gas discharged from the back pressure regulating valve 17 is equal to the pressure of the gas discharged from the gas injection valve 11. Both the gas discharged from the gas injection valve 11 and the gas discharged from the back pressure regulating valve 17 can be introduced into the throttle valve 14.
Further, the test platform further comprises a fourth shutoff valve 16, and the fourth shutoff valve 16 is arranged at the upstream of the back pressure regulating valve 17. The fourth shutoff valve 16 and the back pressure regulating valve 17 are connected in parallel with the gas injection valve 11. The fourth shut-off valve 16 is provided between the main pressure regulating valve (the secondary pressure regulating valve 6) and the back pressure regulating valve 17. The outlet end of the second-stage pressure regulating valve 6 is communicated with the inlet end of the fourth shut-off valve 16 and the inlet end of the gas injection valve 11, and gas from the second-stage pressure regulating valve 6 can respectively enter the gas injection valve 11 and the back pressure regulating valve 17. The outlet end of the fourth shut-off valve 16 is in fluid communication with the inlet end of a back pressure regulating valve 17. Gas can enter the back pressure regulating valve 17 via the fourth shut-off valve 16. The fourth shut-off valve 16 opens or shuts off the gas flow path.
The back pressure regulating valve 17 is configured to be adjustable such that when the opening degree of the back pressure regulating valve 17 is decreased, the outlet pressure of the gas discharged from the back pressure regulating valve 17 is decreased. Thus, the outlet pressure of the gas discharged from the gas injection valve 11 is reduced. The inlet end of the flow meter 7 is in fluid communication with the inlet end of a back pressure regulating valve (fourth shut-off valve 16), and the outlet end of the back pressure regulating valve 17 is located downstream of the second pressure sensor 13. Thereby, the outlet pressure value of the gas injection valve 11 can be obtained, and the mass flow rate of the gas injection valve 11 can be obtained. That is, the valve back pressure of the gas injection valve is set by the throttle valve 14 and the back pressure regulating valve 17 together, and the flow meter 7 records the mass flow rate of the gas injection valve under different conditions, thereby obtaining the injection characteristic of the gas injection valve.
Of course, the back pressure regulating valve 17 is configured to be adjustable such that the outlet pressure of the gas discharged from the back pressure regulating valve 17 increases as the opening degree of the back pressure regulating valve 17 increases. Thus, the outlet pressure of the gas discharged from the gas injection valve 11 is increased. Thereby, the outlet pressure value of the gas injection valve 11, and further, the mass flow rate of the gas injection valve 11 can be obtained.
The opening degree of the throttle valve 14 is decreased and the pressure of the gas is increased. The opening degree of the throttle valve 14 increases and the pressure of the gas decreases. The back pressure regulating valve 17 can regulate the pressure of the gas in conjunction with the throttle valve 14. The opening degree of the back pressure regulating valve 17 is decreased so that the pressure of the gas discharged from the back pressure regulating valve 17 is decreased, thereby decreasing the pressure of the gas discharged from the gas injection valve 11. The opening degree of the back pressure regulating valve 17 is increased so that the pressure of the gas discharged from the back pressure regulating valve 17 is increased, thereby increasing the pressure of the gas discharged from the gas injection valve 11.
When the injection back pressure is atmospheric pressure, the opening degree of the throttle valve 14 is adjusted to the maximum, and the back pressure adjusting valve is adjusted to the minimum pressure. When the back pressure needs to be increased, the opening degree of the throttle valve 14 is gradually reduced, and the back pressure is gradually increased. In this case, the injection state of the gas injection valve 11 is generally a choked flow, and the injection mass flow rate of the gas injection valve 11 is independent of the back pressure.
When the back pressure (outlet pressure) reaches about half the pre-valve pressure (inlet pressure), the choked flow disappears. The injection mass flow of the gas injection valve 11 is dependent on both the pre-valve pressure and the back pressure. At this time, the valve back pressure can be accurately adjusted by the back pressure adjusting valve. To sum up, the utility model provides a testable injection valve of test platform is at the mass flow who blocks flow and the non-block state of flowing, and the backpressure adjusts the accuracy.
According to the utility model discloses a test platform, test platform is used for testing gas injection valve 11, test platform includes the main pressure regulating valve, choke valve 14 and backpressure regulating valve 17, the main pressure regulating valve is used for adjusting the inlet pressure of the gas that gets into gas injection valve 11, choke valve 14 is used for adjusting the export pressure of the gas that gas injection valve 11 discharges, backpressure regulating valve 17 is parallelly connected with gas injection valve 11, and be located the low reaches of main pressure regulating valve, backpressure regulating valve 17 and choke valve 14 can adjust the backpressure of gas injection valve 11 jointly, for gas injection valve 11 produces stable, adjustable valve back pressure in the injection characteristic test, thereby make gas injection valve 11 test in the environment of backpressure, press close to the actual operational environment of gas injection valve 11 more, thereby obtain accurate experimental value to gas injection valve 11 tests, measure the jet flow of gas injection valve 11 when different backpressures, the injection quantity of the fuel gas injection valve 11 is more accurate, and the heat efficiency and the emission index of the whole machine are optimized.
As is known from the physical law of gas flow, the mass flow rate injected by the gas injection valve 11 is related to the pre-valve pressure (inlet pressure of gas) and the post-valve pressure (outlet pressure of gas) of the gas injection valve 11, and therefore the pre-valve pressure (inlet pressure of gas) and the post-valve pressure (outlet pressure of gas) of the gas injection valve 11 affect the mass flow rate of the gas injection valve 11. In product design, the mass flow rate of the gas injection valve 11 is usually calculated using a theoretical formula, and the theoretical formula is corrected by a test value. The back pressure affects the injection quantity of the gas injection valve 11, and thus affects the thermal efficiency and emissions of the engine. Therefore, the utility model discloses a test platform can provide the backpressure environment for gas injection valve 11 well, and especially middle-low speed gas injection valve provides the backpressure environment to test the injection flow of gas injection valve 11 under different pre-valve pressure and valve back pressure. Therefore, test data support can be provided for design and correction of the injection quantity of the fuel gas injection valve 11, the fuel gas injection quantity of the engine is controlled more accurately, and the heat efficiency and the emission index of the whole engine are optimized.
In order to obtain accurate data of the flowmeter 7, the first pressure sensor 9, the temperature sensor 10 and the second pressure sensor 13, the test platform further comprises a data acquisition and processing device which is electrically connected with the flowmeter 7, the first pressure sensor 9, the temperature sensor 10 and the second pressure sensor 13 respectively. Preferably, the data acquisition processing device comprises an acquisition card 18 and an industrial personal computer 19, and the acquisition card 18 can acquire data measured by the flowmeter 7, the first pressure sensor 9, the temperature sensor 10 and the second pressure sensor 13. The acquisition card 18 is electrically connected with the industrial personal computer 19, the acquisition card 18 can feed back acquired data to the industrial personal computer 19, the industrial personal computer 19 can record the data acquired by the acquisition card 18, can draw a curve according to the acquired data, and obtains the flow of the gas injection valve 11 under different inlet pressures and outlet pressures through processing and evaluating the curve, so that the mass flow of the gas injection valve 11 under different pre-valve pressures and post-valve pressures is obtained, and the complete injection characteristic of the gas injection valve 11 is mastered.
During the injection characteristic test, the pressure, temperature and flow signal data are transmitted to the acquisition card 18 and displayed and stored on an output element. The industrial personal computer 19 can automatically record the change curves of the instantaneous flow, the pressure before the valve, the pressure after the valve and the temperature of the injection valve along with the time in the injection characteristic test process, and is convenient for post-processing of test data and evaluation of test results. In this way, the data acquisition and processing device can determine whether the gas flow has reached a desired steady state and simultaneously read the pressure, temperature and flow values. Even low-speed quick-witted gas injection valve jet flow is very big, the utility model provides a test platform can reduce the experimental air consumption of injection characteristic and experimental long, and improved the experimental exactness of injection characteristic and traceability, avoids adopting artifical mode to go on, reduces the air consumption of testing process, avoids increasing injection characteristic experimental long by a wide margin.
Specifically, when the injection characteristic test of the gas injection valve 11 is performed, the gas storage device 1 is charged to a pressure P1, the pressure of the primary regulator valve 4 is set to P2, the pressure of the secondary regulator valve 6 is set to P3, the pressure of the back pressure regulator valve 17 is set to P4, and the opening degree of the throttle valve 14 is adjusted to the maximum.
All the on-off valves are opened, and the gas in the gas storage device 1 is injected outwards through the branch of the gas injection valve 11 and the branch of the back pressure regulating valve 17. At this time, the pre-valve pressure (inlet pressure) of the gas injection valve 11 is P3, the post-valve pressure (outlet pressure) is P4, and the mass flow rate is f 1.
By changing the set pressures of the secondary regulator valve 6 and the back pressure regulator valve 17 and the opening degree of the throttle valve 14, the pre-valve pressure (inlet pressure) P3 and the post-valve pressure (outlet pressure) P4 of the gas injection valve 11 can be changed, and the mass flow rate f at different pre-valve pressures and post-valve pressures can be measured by the flowmeter 7.
The acquisition card 18 and the industrial personal computer 19 can record the time-dependent changes of the values of the pressure P3 before the valve, the temperature T3 before the valve, the pressure P4 after the valve and the mass flow f. The mass flow of the fuel gas injection valve 11 under different pre-valve pressures and post-valve pressures can be obtained through processing and evaluating the curves, and the complete injection characteristic of the injection valve is mastered.
Further, the test platform also comprises a protective cover 12, and the protective cover 12 can cover the gas injection valve 11, so that physical damage to operators caused by explosion of the gas injection valve 11 in the test process is prevented. The test platform also includes a muffler 15, the muffler 15 being disposed downstream of the throttle valve 14 for exhaust silencing.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that many more modifications and variations can be made in accordance with the teachings of the present invention, all of which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A test platform for testing a gas injection valve, the test platform comprising:
a main pressure regulating valve disposed upstream of the gas injection valve for regulating an inlet pressure of gas entering the gas injection valve;
a throttle valve provided downstream of the gas injection valve for adjusting an outlet pressure of the gas discharged from the gas injection valve; and
the back pressure regulating valve is connected with the gas injection valve in parallel and is positioned at the downstream of the main pressure regulating valve, the inlet end of the back pressure regulating valve is communicated with the inlet end of the gas injection valve, and the outlet end of the back pressure regulating valve is communicated with the outlet end of the gas injection valve and the inlet end of the throttle valve.
2. The test platform of claim 1, wherein the throttle valve is configured to be adjustable such that it enables
When the opening degree of the throttle valve is reduced, the outlet pressure of the gas discharged by the gas injection valve is increased; and/or
When the opening degree of the throttle valve is increased, the outlet pressure of the gas discharged from the gas injection valve is decreased.
3. The test platform of claim 1, wherein the master pressure regulating valve comprises a primary pressure regulating valve disposed upstream of the gas injection valve to reduce the pressure of the gas.
4. The test platform of claim 3, wherein the primary pressure regulating valve further comprises a secondary pressure regulating valve disposed between the primary pressure regulating valve and the gas injection valve to regulate the pressure of the gas discharged by the primary pressure regulating valve to the inlet pressure.
5. The test platform of claim 1, further comprising a flow meter having an inlet end in communication with the inlet end of the back pressure regulating valve and an outlet end in communication with the inlet end of the gas injection valve, the flow meter being configured to measure the mass flow of the gas entering the gas injection valve.
6. The test platform of claim 5, further comprising a first pressure sensor disposed between the gas injection valve and the flow meter, the first pressure sensor for measuring an inlet pressure of the gas entering the gas injection valve.
7. The test platform of claim 6, further comprising a second pressure sensor disposed between the throttle valve and the gas injection valve for measuring an outlet pressure of the gas discharged by the gas injection valve.
8. The test platform of claim 7, further comprising a temperature sensor disposed between the gas injection valve and the flow meter, the temperature sensor for measuring a temperature of the gas.
9. The testing platform of claim 8, further comprising a data acquisition and processing device electrically connected to the flow meter, the first pressure sensor, the second pressure sensor, and the temperature sensor, respectively.
10. The test platform of claim 1, further comprising an on-off valve disposed upstream of the gas injection valve and/or the back pressure regulating valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472069.5U CN212155023U (en) | 2020-04-02 | 2020-04-02 | Test platform |
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| CN202020472069.5U CN212155023U (en) | 2020-04-02 | 2020-04-02 | Test platform |
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| CN212155023U true CN212155023U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881024A (en) * | 2021-01-15 | 2021-06-01 | 中汽研汽车检验中心（天津）有限公司 | Hydrogen injector testing device and testing method for hydrogen fuel cell engine |
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2020
- 2020-04-02 CN CN202020472069.5U patent/CN212155023U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881024A (en) * | 2021-01-15 | 2021-06-01 | 中汽研汽车检验中心（天津）有限公司 | Hydrogen injector testing device and testing method for hydrogen fuel cell engine |
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Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: The 711 Research Institute of China Shipbuilding Corp. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute |