Fuel Nozzle Flow Test System

Abstract

This application relates to a fuel nozzle flow testing system for testing liquid-gas dual-fuel nozzles. The system includes a liquid flow testing system and a gas flow testing system. The liquid flow testing system includes a fuel supply assembly, a fuel outlet line, and a liquid flow meter. The fuel supply assembly is connected to the inlet of the liquid-gas dual-fuel nozzle and is used to deliver liquid fuel. One end of the fuel outlet line is connected to the outlet of the liquid-gas dual-fuel nozzle, and the liquid flow meter is located on the fuel outlet line. The gas flow testing system includes a gas supply assembly, a gas outlet line, and a gas flow meter. The gas supply assembly is connected to the inlet of the liquid-gas dual-fuel nozzle and is used to deliver gaseous fuel. One end of the gas outlet line is connected to the outlet of the liquid-gas dual-fuel nozzle, and the gas flow meter is located on the gas outlet line. This fuel nozzle testing system can measure the flow rate of both liquid and gaseous fuel, thereby meeting the flow testing requirements of fuel nozzles in liquid-gas dual-fuel engines.

Description

Technical Field

[0001] This application relates to the technical field of vehicle fuel nozzle flow testing systems, and in particular to a fuel nozzle flow testing system. Background Technology

[0002] Among alternative fuels, natural gas, methanol, ethanol, hydrogen, and ammonia offer advantages in low emissions, making them a key focus of research for experts both domestically and internationally. During engine combustion, the fuel injection characteristics significantly impact overall engine performance and combustion efficiency. The fuel injector is the core component of an internal combustion engine, and the fuel nozzle assembly is a crucial part of the fuel injector, greatly influencing its performance, overall engine performance, and thermal efficiency. Therefore, obtaining the flow injection performance of the fuel nozzle is extremely important. With the development of dual-fuel engines and technological breakthroughs in key components, the demand for flow testing of liquid-gas dual-fuel injector assemblies is increasing.

[0003] In related technologies, a fuel nozzle flow rate testing system for measuring liquid nozzle flow rate is provided.

[0004] However, the fuel nozzle flow testing system in the relevant technology has difficulty measuring the flow rate of gaseous fuel. Summary of the Invention

[0005] Therefore, it is necessary to provide a fuel nozzle flow test system that can measure the flow rate of gaseous fuels and liquid fuels separately, addressing the problem that fuel nozzle flow test systems in related technologies have difficulty measuring the flow rate of gaseous fuels.

[0006] According to one aspect of this application, a fuel nozzle flow rate testing system is provided for testing liquid-gas dual-fuel nozzles, the fuel nozzle flow rate testing system comprising:

[0007] A liquid flow testing system includes a fuel supply assembly, a fuel outlet pipeline, and a liquid flow meter. The fuel supply assembly is connected to the inlet of the liquid-gas dual-fuel nozzle and is used to supply liquid fuel to the nozzle. One end of the fuel outlet pipeline is connected to the outlet of the nozzle. The liquid flow meter is installed on the fuel outlet pipeline and is used to measure the real-time flow rate of the liquid fuel flowing through the pipeline.

[0008] A gas flow testing system includes a gas supply component, a gas outlet pipeline, and a gas flow meter. The gas supply component is connected to the inlet of the liquid-gas dual-fuel nozzle and is used to supply gaseous fuel to the liquid-gas dual-fuel nozzle. One end of the gas outlet pipeline is connected to the outlet of the liquid-gas dual-fuel nozzle. The gas flow meter is installed on the gas outlet pipeline and is used to measure the real-time flow rate of the gaseous fuel flowing through the gas outlet pipeline.

[0009] The aforementioned fuel nozzle testing system includes a liquid flow testing system to measure the real-time flow rate of liquid fuel flowing through the oil outlet pipe and a gas flow testing system to measure the real-time flow rate of gaseous fuel flowing through the gas outlet pipe. This allows for the separate measurement of the flow rates of liquid and gaseous fuels, thereby meeting the flow rate testing requirements of the fuel nozzles in a liquid-gas dual-fuel engine.

[0010] In one embodiment, the fuel supply assembly includes a fuel inlet pipe with one end connected to the inlet of the liquid-gas dual-fuel nozzle, a fuel rail and a first fuel shut-off valve disposed on the fuel inlet pipe, the first fuel shut-off valve being located between the fuel rail and the inlet of the liquid-gas dual-fuel nozzle, and the first fuel shut-off valve being configured to open the fuel inlet pipe when the pressure of the fuel rail reaches a preset fuel rail pressure.

[0011] The gas supply assembly includes an air intake pipe with one end connected to the inlet of the liquid-gas dual-fuel nozzle, an air rail and a first air circuit cut-off valve disposed on the air intake pipe. The first air circuit cut-off valve is located between the air rail and the inlet of the liquid-gas dual-fuel nozzle, and the first air circuit cut-off valve is configured to open the air intake pipe when the pressure of the air rail reaches a preset air rail pressure.

[0012] In one embodiment, the fuel nozzle flow test system further includes a controller, which is electrically connected to the first oil circuit shut-off valve and the first gas circuit shut-off valve, respectively.

[0013] The controller is configured to control the first oil circuit cut-off valve to open the oil inlet pipeline when the pressure of the oil rail reaches the preset oil rail pressure, and to control the first oil circuit cut-off valve to close the oil inlet pipeline after the first oil circuit cut-off valve has opened the oil inlet pipeline for a first preset time.

[0014] The controller is also configured to control the first air circuit cut-off valve to open the air intake pipe when the pressure of the air rail reaches the preset air rail pressure, and to control the first air circuit cut-off valve to close the air intake pipe after the first air circuit cut-off valve has opened the air intake pipe for a second preset time.

[0015] In one embodiment, the liquid flow testing system further includes a second oil circuit shut-off valve disposed on the oil outlet pipeline, the second oil circuit shut-off valve being located between the outlet of the liquid-gas dual-fuel nozzle and the liquid flow meter;

[0016] The gas flow testing system also includes a second gas path shut-off valve located on the gas outlet pipeline, the second gas path shut-off valve being located between the outlet of the liquid-gas dual-fuel nozzle and the gas flow meter;

[0017] The controller is electrically connected to the second oil circuit shut-off valve and the second air circuit shut-off valve respectively. The controller is used to control the second oil circuit shut-off valve to close the oil outlet pipe after the first oil circuit shut-off valve opens the oil inlet pipe for the first preset time, and to control the second air circuit shut-off valve to close the air outlet pipe after the first air circuit shut-off valve opens the air inlet pipe for the second preset time.

[0018] In one embodiment, the fuel nozzle flow test system further includes a data signal acquisition module electrically connected to the liquid flow meter, the gas flow meter, and the controller, respectively;

[0019] The data signal acquisition module is used to acquire the real-time flow rate of the liquid fuel measured by the liquid flow meter and transmit it to the controller. The data signal acquisition module is also used to acquire the real-time flow rate of the gaseous fuel measured by the gas flow meter and transmit it to the controller.

[0020] The controller is used to calculate the total flow rate and average flow rate of the liquid fuel flowing through the oil outlet pipeline based on the real-time flow rate of the liquid fuel. The controller is also used to calculate the total flow rate and average flow rate of the gaseous fuel flowing through the gas outlet pipeline based on the real-time flow rate of the gaseous fuel.

[0021] In one embodiment, the fuel supply assembly further includes a fuel tank connected to one end of the fuel inlet line away from the liquid-gas dual-fuel nozzle, and a fuel supply pump disposed on the fuel inlet line, the fuel supply pump being disposed between the fuel tank and the fuel rail;

[0022] The controller is electrically connected to the fuel pump, and the controller can control the fuel pump to output the liquid fuel to the fuel rail so that the pressure of the fuel rail reaches the preset fuel rail pressure. In one embodiment, the air supply assembly includes a first air pressure regulating valve and a pressure stabilizing tank respectively disposed on the air intake pipeline, the first air pressure regulating valve being located between the pressure stabilizing tank and the air rail;

[0023] The controller is electrically connected to the first pressure regulating valve, and the controller is used to control the first pressure regulating valve to output the gaseous fuel to the gas rail so that the pressure of the gas rail reaches the preset gas rail pressure. In one embodiment, the gas supply assembly further includes a gas source and a second pressure regulating valve. The gas source is connected to the end of the air inlet pipe away from the liquid-gas dual-fuel nozzle, and the second pressure regulating valve is disposed on the air inlet pipe and located between the gas source and the pressure stabilizing tank.

[0024] The controller is electrically connected to the second pressure regulating valve to control the second pressure regulating valve to output the gaseous fuel to the pressure stabilizing tank at a preset inlet pressure.

[0025] In one embodiment, the gas outlet pipeline includes a main gas outlet and a first gas outlet branch located on both sides of the gas flow meter. The end of the main gas outlet away from the gas flow meter is connected to the outlet of the liquid-gas dual-fuel nozzle, and the end of the first gas outlet branch away from the gas flow meter is connected to the atmosphere.

[0026] The gas flow testing system also includes a third gas path shut-off valve located on the first gas outlet branch.

[0027] In one embodiment, the gas outlet pipeline further includes a second gas outlet branch, one end of which is connected in parallel with one end of the first gas outlet branch to the gas flow meter;

[0028] The gas flow testing system also includes a fourth gas path shut-off valve located on the second gas outlet branch, and a gas recovery tank connected to the end of the fourth gas path away from the gas flow meter. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a fuel nozzle flow test system in one embodiment of this application.

[0030] Explanation of icon numbers:

[0031] 100. Fuel nozzle flow rate testing system;

[0032] 10. Liquid flow rate testing system;

[0033] 11. Fuel supply assembly; 111. Fuel inlet line; 111a. First high-pressure oil pipe; 111b. Second high-pressure oil pipe; 112. Fuel rail; 113. First oil circuit shut-off valve; 114. First temperature and pressure sensor; 115. Fuel tank; 116. Fuel supply pump;

[0034] 12. Oil outlet pipeline;

[0035] 13. Liquid flow meter;

[0036] 14. Second oil circuit shut-off valve;

[0037] 20. Gas flow rate testing system;

[0038] 21. Air supply assembly; 211. Air inlet pipe; 212. Air rail; 213. First air circuit shut-off valve; 214. Second temperature and pressure sensor; 215. First air pressure regulating valve; 216. Pressure stabilizing tank; 217. Third temperature and pressure sensor; 218. Air source; 219. Second air pressure regulating valve;

[0039] 22. Gas outlet pipeline; 221. Main gas outlet pipeline; 222. First gas outlet branch pipeline; 223. Second gas outlet branch pipeline; 23. Gas flow meter;

[0040] 24. Second gas circuit shut-off valve;

[0041] 25. Third gas circuit shut-off valve;

[0042] 26. Fourth gas circuit shut-off valve;

[0043] 27. Gas recovery tank;

[0044] 30. Controller;

[0045] 40. Data signal acquisition module;

[0046] 200. Fuel nozzle. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0053] Figure 1 This is a schematic diagram of a fuel nozzle flow test system in one embodiment of this application.

[0054] See Figure 1 The fuel nozzle flow test system 100 provided in one embodiment of this application is used to test a liquid-gas dual-fuel nozzle 200. The fuel nozzle flow test system 100 includes a liquid flow test system 10 and a gas flow test system 20.

[0055] The liquid flow testing system 10 includes a fuel supply assembly 11, a fuel outlet pipeline 12, and a liquid flow meter 13. The fuel supply assembly 11 is connected to the inlet of the liquid-gas dual-fuel nozzle 200 and is used to supply liquid fuel to the liquid-gas dual-fuel nozzle 200. One end of the fuel outlet pipeline 12 is connected to the outlet of the liquid-gas dual-fuel nozzle 200. The liquid flow meter 13 is installed on the fuel outlet pipeline 12 and is used to measure the real-time flow rate of the liquid fuel flowing through the fuel outlet pipeline 12. The gas flow testing system 20 includes a gas supply assembly 21, a gas outlet pipeline 22, and a gas flow meter 23. The gas supply assembly 21 is connected to the inlet of the liquid-gas dual-fuel nozzle 200 and is used to supply gaseous fuel to the liquid-gas dual-fuel nozzle 200. One end of the gas outlet pipeline 22 is connected to the outlet of the liquid-gas dual-fuel nozzle 200. The gas flow meter 23 is installed on the gas outlet pipeline 22 and is used to measure the real-time flow rate of the gaseous fuel flowing through the gas outlet pipeline 22.

[0056] The aforementioned fuel nozzle flow testing system 100 includes a fuel supply assembly 11 that supplies liquid fuel to the inlet of a liquid-gas dual-fuel nozzle 200, which is then ejected from the outlet of the nozzle 200 into an oil outlet pipeline 12. A liquid flow meter 13 is installed on the oil outlet pipeline 12 to measure the real-time flow rate of the liquid fuel flowing through it. Similarly, a gas supply assembly 21 supplies gaseous fuel to the inlet of the liquid-gas dual-fuel nozzle 200, which is then ejected from the outlet of the nozzle 200 into a gas outlet pipeline 22. A gas flow meter 23 is installed on the gas outlet pipeline 22 to measure the real-time flow rate of the gaseous fuel flowing through it. In this way, the fuel nozzle flow test system 100 can measure the liquid flow rate and the gas flow rate of the liquid-gas dual-fuel nozzle 200 respectively, so as to obtain the flow injection performance of the liquid-gas dual-fuel nozzle 200 for liquid fuel and gas fuel respectively, thereby meeting the flow test requirements of the liquid-gas dual-fuel nozzle 200 of the liquid-gas dual-fuel engine.

[0057] It is understood that the fuel nozzle flow testing system 100 can also be applied to individual liquid nozzles or gas nozzles. For example, in practical use, the inlet of an individual liquid nozzle can be connected to the fuel supply assembly 11, and the outlet of the individual liquid nozzle can be connected to the fuel outlet line 12, thereby performing flow testing on the individual liquid nozzle. Similarly, the inlet of an individual gas nozzle can be connected to the gas supply assembly 21, and the outlet of the individual gas nozzle can be connected to the gas outlet line 22, thereby performing flow testing on the individual gas nozzle. Therefore, the fuel nozzle flow testing system 100 is highly adaptable to different types of fuel nozzles.

[0058] Specifically, the liquid-gas dual-fuel nozzle 200 is provided with a gas fuel flow channel and a liquid fuel flow channel. The two ends of the gas fuel flow channel are connected to the inlet and outlet of the liquid-gas dual-fuel nozzle 200, respectively, and the two ends of the liquid fuel flow channel are connected to the inlet and outlet of the liquid-gas dual-fuel nozzle 200, respectively.

[0059] Optionally, the gaseous fuel flow path and the liquid fuel flow path are independent of each other, or the gaseous fuel flow path includes a flow path shared with the liquid fuel flow path. The number of outlets of the dual-fuel nozzle 200 can be one or two.

[0060] In some embodiments, the fuel nozzle flow testing system 100 further includes a fixing device (not shown) for fixing the liquid-gas dual-fuel nozzle 200. Optionally, the fixing device includes a plurality of replaceable clamps, each clamp for clamping and fixing the corresponding liquid-gas dual-fuel nozzle 200 or a separate gas nozzle or liquid nozzle.

[0061] In some embodiments, such as Figure 1 As shown, the fuel supply assembly 11 includes a fuel inlet pipe 111 connected at one end to the inlet of the dual-fuel nozzle 200, a fuel rail 112 and a first fuel shut-off valve 113 disposed on the fuel inlet pipe 111. The first fuel shut-off valve 113 is located between the fuel rail 112 and the inlet of the dual-fuel nozzle 200, and is configured to open the fuel inlet pipe 111 when the pressure of the fuel rail 112 reaches a preset fuel rail pressure. The air supply assembly 21 includes an air inlet pipe 211 connected at one end to the inlet of the dual-fuel nozzle 200, an air rail 212 and a first air shut-off valve 213 disposed on the air inlet pipe 211. The first air shut-off valve 213 is located between the air rail 212 and the inlet of the dual-fuel nozzle 200, and is configured to open the air inlet pipe 211 when the pressure of the air rail 212 reaches a preset air rail pressure. It should be noted that the fuel rail 112 is a component in the fuel circuit before the injectors in an internal combustion engine. Thus, by setting up the fuel rail 112 and the first fuel circuit cut-off valve 113, when the pressure of the fuel rail 112 reaches the preset fuel rail pressure, the first fuel circuit cut-off valve 113 opens the fuel inlet pipe 111 to supply liquid fuel to the inlet of the liquid-gas dual-fuel injector 200 through the fuel rail 112, thereby simulating the actual application scenario of the liquid-gas dual-fuel injector 200. Similarly, the gas rail 212 is a component in the gas circuit before the injectors in an internal combustion engine. By setting up the gas rail 212 and the first gas circuit cut-off valve 213, when the pressure of the gas rail 212 reaches the preset gas rail pressure, the first gas circuit cut-off valve 213 opens the air inlet pipe 211 to supply gaseous fuel to the inlet of the liquid-gas dual-fuel injector 200 through the gas rail 212, thereby simulating the actual application scenario of the liquid-gas dual-fuel injector 200.

[0062] It is understandable that the preset oil rail pressure and preset gas rail pressure can be set according to usage requirements. For example, the preset oil rail pressure and preset gas rail pressure can be set according to the actual usage needs of the liquid-gas dual-fuel nozzle 200. Therefore, in the above embodiment, the flow rate of the liquid-gas dual-fuel nozzle 200 under different pressures can be measured according to usage requirements, achieving good versatility.

[0063] In some embodiments, such as Figure 1 As shown, the fuel nozzle flow testing system 100 also includes a controller 30, which is electrically connected to a first oil circuit shut-off valve 113 and a first air circuit shut-off valve 213. The controller 30 is configured to control the first oil circuit shut-off valve 113 to open the oil inlet pipe 111 when the pressure of the oil rail 112 reaches a preset oil rail pressure, and to control the first oil circuit shut-off valve 113 to close the oil inlet pipe 111 after the first oil circuit shut-off valve 113 has opened the oil inlet pipe 111 for a first preset time. The controller 30 is also configured to control the first air circuit shut-off valve 213 to open the air inlet pipe 211 when the pressure of the air rail 212 reaches a preset air rail pressure, and to control the first air circuit shut-off valve 213 to close the air inlet pipe 211 after the first air circuit shut-off valve 213 has opened the air inlet pipe 211 for a second preset time. Thus, the controller 30 enables automatic control of the opening and closing of the first oil circuit shut-off valve 113 and the first gas circuit shut-off valve 213, and can measure the real-time flow rate of liquid fuel ejected from the liquid-gas dual-fuel nozzle 200 within a first preset time through the liquid flow meter 13, and measure the real-time flow rate of gaseous fuel ejected from the liquid-gas dual-fuel nozzle 200 within a second preset time through the gas flow meter 23.

[0064] It should be noted that both the first and second preset times can be set according to usage requirements. For example, the first and second preset times can be set according to the needs of actual use and industry standards. Therefore, in the above embodiment, the flow rate of the liquid-gas dual-fuel nozzle 200 at different injection times can be measured according to testing needs, achieving good versatility.

[0065] In some embodiments, such as Figure 1As shown, the liquid flow testing system 10 also includes a second oil circuit shut-off valve 14 located on the oil outlet pipeline 12, between the outlet of the liquid-gas dual-fuel nozzle 200 and the liquid flow meter 13. The gas flow testing system 20 also includes a second gas circuit shut-off valve 24 located on the gas outlet pipeline 22, between the outlet of the liquid-gas dual-fuel nozzle 200 and the gas flow meter 23. The controller 30 is electrically connected to the second oil circuit shut-off valve 14 and the second gas circuit shut-off valve 24 respectively. The controller 30 is used to control the second oil circuit shut-off valve 14 to close the oil outlet pipeline 12 after the first oil circuit shut-off valve 113 opens the oil inlet pipeline 111 for a first preset time, and to control the second gas circuit shut-off valve 24 to close the gas outlet pipeline 22 after the first gas circuit shut-off valve 213 opens the air inlet pipeline 211 for a second preset time. This makes the flow rate measured by the liquid flow meter 13 through the oil outlet pipe 12 within the first preset time period more accurate, and makes the flow rate measured by the gas flow meter 23 through the gas outlet pipe 22 within the second preset time period more accurate.

[0066] Specifically, the controller 30 is also used to control the second oil circuit cut-off valve 14 to open the oil outlet pipeline 12 when the pressure of the oil rail 112 reaches the preset oil rail pressure, and to control the second air circuit cut-off valve 24 to open the air outlet pipeline 22 when the pressure of the air rail 212 reaches the preset air rail pressure.

[0067] In some embodiments, such as Figure 1 As shown, the fuel nozzle flow testing system 100 also includes a data signal acquisition module 40 electrically connected to the liquid flow meter 13, the gas flow meter 23, and the controller 30, respectively. The data signal acquisition module 40 acquires the real-time flow rate of the liquid fuel measured by the liquid flow meter 13 and transmits it to the controller 30. The data signal acquisition module 40 also acquires the real-time flow rate of the gaseous fuel measured by the gas flow meter 23 and transmits it to the controller 30. The controller 30 calculates the total flow rate and average flow rate of the liquid fuel flowing through the oil outlet pipe 12 based on the real-time flow rate of the liquid fuel. The controller 30 also calculates the total flow rate and average flow rate of the gaseous fuel flowing through the gas outlet pipe 22 based on the real-time flow rate of the gaseous fuel. Thus, the fuel nozzle flow testing system 100 can acquire the real-time flow rate, total flow rate, and average flow rate of both liquid and gaseous fuel, thereby meeting a wider range of flow testing needs for the liquid-gas dual-fuel nozzle 200.

[0068] In some embodiments, such as Figure 1As shown, the oil supply assembly 11 also includes a first temperature and pressure sensor 114 disposed on the oil rail 112, and the air supply assembly 21 also includes a second temperature and pressure sensor 214 disposed on the air rail 212. The data signal acquisition module 40 is electrically connected to the first temperature and pressure sensor 114 and the second temperature and pressure sensor 214 respectively to acquire the temperature and pressure of the oil rail 112 measured by the first temperature and pressure sensor 114, and the temperature and pressure of the air rail 212 measured by the second temperature and pressure sensor 214. Thus, by setting the first temperature and pressure sensor 114 to measure the temperature and pressure of the oil rail 112, the temperature and pressure changes of the oil rail 112 are monitored, thereby improving the accuracy of pressure measurement of the oil rail 112. By setting the second temperature and pressure sensor 214 to measure the temperature and pressure of the air rail 212, the temperature and pressure changes of the air rail 212 are monitored, thereby improving the accuracy of pressure measurement of the air rail 212, and ultimately improving the reliability and accuracy of flow measurement.

[0069] In some embodiments, such as Figure 1 As shown, the fuel supply assembly 11 also includes a fuel tank 115 connected to the end of the fuel inlet line 111 away from the liquid-gas dual-fuel nozzle 200, and a fuel supply pump 116 disposed on the fuel inlet line 111. The fuel supply pump 116 is located between the fuel tank 115 and the fuel rail 112. The controller 30 is electrically connected to the fuel supply pump 116, and the controller 30 can control the fuel supply pump 116 to output liquid fuel to the fuel rail 112 so that the pressure of the fuel rail 112 reaches the preset fuel rail pressure. In this way, the controller 30 can control the output of the fuel supply pump 116 according to the usage needs. The fuel supply pump 116 is used to output liquid fuel to the fuel rail 112. By setting the fuel supply pump 116, the fuel injection pressure of the fuel supply assembly 11 has strong applicability and is suitable for flow testing of various types of liquid-gas dual-fuel nozzles 200.

[0070] Specifically, such as Figure 1 As shown, the oil inlet pipeline 111 includes a first high-pressure oil pipe 111a connecting the outlet of the oil supply pump 116 and the inlet of the oil rail 112, and a second high-pressure oil pipe 111b connecting the outlet of the oil rail 112 and the inlet of the first oil circuit shut-off valve 113. Thus, by providing the first high-pressure oil pipe 111a and the second high-pressure oil pipe 111b, the structural reliability of the oil inlet pipeline 111 is improved.

[0071] In some embodiments, such as Figure 1As shown, the gas supply assembly 21 includes a first pressure regulating valve 215 and a pressure stabilizing tank 216 respectively disposed on the air inlet pipe 211. The first pressure regulating valve 215 is located between the pressure stabilizing tank 216 and the gas rail 212. The controller 30 is electrically connected to the first pressure regulating valve 215, and the controller 30 is used to control the first pressure regulating valve 215 to output gaseous fuel to the gas rail 212 so that the gas pressure of the gas rail 212 reaches the preset gas rail pressure. In this way, the controller 30 can control the operation of the first pressure regulating valve 215 so that the gaseous fuel output by the first pressure regulating valve 215 meets the pressure requirements of the gas rail 212, thereby making the pressure of the gas rail 212 more stable and the measurement results of the gas flow test system 20 more accurate.

[0072] Specifically, the gas supply assembly 21 also includes a third temperature and pressure sensor 217 mounted on the pressure stabilizing tank 216. The data signal acquisition module 40 is electrically connected to the third temperature and pressure sensor 217 to acquire the temperature and pressure of the pressure stabilizing tank 216 obtained by the third temperature and pressure sensor 217. In this way, the temperature and pressure changes of the pressure stabilizing tank 216 can be monitored, thereby improving the accuracy of pressure measurement of the pressure stabilizing tank 216, and further improving the reliability and accuracy of flow measurement.

[0073] In some embodiments, such as Figure 1 As shown, the gas supply assembly 21 also includes a gas source 218 and a second pressure regulating valve 219. The gas source 218 is connected to the end of the intake pipe 211 away from the liquid-gas dual-fuel nozzle 200. The second pressure regulating valve 219 is located on the intake pipe 211 and between the gas source 218 and the pressure stabilizing tank 216. The controller 30 is electrically connected to the second pressure regulating valve 219 and is used to control the second pressure regulating valve 219 to output gaseous fuel to the pressure stabilizing tank 216 at a preset intake pressure. In this way, the controller 30 can control the operation of the second pressure regulating valve 219 to inject gaseous fuel into the pressure stabilizing tank 216.

[0074] Optionally, the gas source 218 uses a high-pressure gas source, which has strong applicability to jet pressure and is suitable for flow testing of various types of liquid-gas dual-fuel nozzles 200.

[0075] In some embodiments, such as Figure 1 As shown, the gas outlet pipeline 22 includes a main gas outlet 221 and a first gas outlet branch 222 located on both sides of the gas flow meter 23. The end of the main gas outlet 221 away from the gas flow meter 23 is connected to the outlet of the liquid-gas dual-fuel nozzle 200, and the end of the first gas outlet branch 222 away from the gas flow meter 23 is connected to the atmosphere. The gas flow test system 20 also includes a third gas path shut-off valve 25 installed on the first gas outlet branch 222. In this way, the gaseous fuel used for testing can flow to the atmosphere through the first gas outlet branch 222.

[0076] In some embodiments, such as Figure 1 As shown, the gas outlet pipe 22 also includes a second gas outlet branch 223, one end of which is connected in parallel with one end of the first gas outlet branch 222 to the gas flow meter 23. The gas flow testing system 20 also includes a fourth gas path shut-off valve 26 installed on the second gas outlet branch 223, and a gas recovery tank 27 connected to the end of the fourth gas path away from the gas flow meter 23. In this way, the gaseous fuel used for testing can flow to the gas recovery tank 27 through the second gas outlet branch 223.

[0077] In some embodiments, such as Figure 1 As shown, the controller 30 is electrically connected to the third gas circuit shut-off valve 25 and the fourth gas circuit shut-off valve 26, respectively. During actual testing, the controller can select whether to recover gaseous fuel as needed. When gaseous fuel recovery is required, the controller 30 controls the third gas circuit shut-off valve 25 to close the first gas outlet branch 222 and controls the fourth gas circuit shut-off valve 26 to open the second gas outlet branch 223. When gaseous fuel recovery is not required, the controller 30 controls the third gas circuit shut-off valve 25 to open the first gas outlet branch 222 and controls the fourth gas circuit shut-off valve 26 to close the second gas outlet branch 223. This allows for flexible selection of whether to recover the gaseous fuel used for testing, resulting in a wide range of gaseous fuel options and good environmental performance.

[0078] In some embodiments, the controller 30 has a liquid fuel flow test mode and a gaseous fuel flow test mode. During actual testing, the controller 30 is first configured to select either the liquid fuel flow test mode or the gaseous fuel flow test mode as needed.

[0079] When a flow test is required on the liquid-gas dual-fuel nozzle 200, the controller 30 selects the liquid fuel flow test mode. The controller 30 controls the fuel supply pump 116 to supply liquid fuel to the fuel rail 112. When the pressure of the fuel rail 112 reaches the preset fuel rail pressure, the controller 30 controls the first fuel circuit shut-off valve 113 and the second fuel circuit shut-off valve 14 to open, supplying liquid fuel to the liquid-gas dual-fuel nozzle 200. After a first preset time has elapsed, the controller 30 controls the first fuel circuit shut-off valve 113 and the second fuel circuit shut-off valve 14 to close. The controller 30 records and calculates the data from the liquid flow meter 13 obtained through the data signal acquisition module 40 to obtain the real-time flow, total flow, and average flow of the liquid-gas dual-fuel nozzle 200 within the first preset time.

[0080] When a flow test is required on the liquid-gas dual-fuel nozzle 200, the controller 30 selects the gas fuel flow test mode. The controller 30 controls the second gas pressure regulating valve 219 to supply gas fuel to the pressure stabilizing tank 216 at a preset inlet pressure. When the pressure of the pressure stabilizing tank 216 reaches the preset pressure, the controller 30 controls the first gas pressure regulating valve 215 to supply gas fuel to the gas rail 212. When the pressure of the gas rail 212 reaches the preset gas rail pressure, the controller 30 controls the first gas path cut-off valve 213 and the second gas path cut-off valve 24 to open, and controls the third gas path cut-off valve 25 or the fourth gas path cut-off valve 26 to open, so as to supply gas fuel to the liquid-gas dual-fuel nozzle 200 and discharge the gas fuel sprayed from the liquid-gas dual-fuel nozzle 200 to the atmosphere or the gas recovery tank 27. When the second preset time is reached, the controller 30 controls the first gas path shut-off valve 213 and the second gas path shut-off valve 24 to close respectively. The controller 30 records and calculates the data of the gas flow meter 23 obtained by the data signal acquisition module 40 to obtain the real-time flow, total flow and average flow of the liquid-gas dual fuel nozzle 200 within the second preset time.

[0081] Therefore, the fuel nozzle flow test system 100 provided in this application is simple to control, and the fuel nozzle flow test system 100 can meet the testing needs of various liquid-gas dual-fuel nozzles 200, and has good practicality and economic value.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fuel nozzle flow rate testing system for testing liquid-gas dual-fuel nozzles, characterized in that, The fuel nozzle flow rate testing system includes: A liquid flow testing system includes a fuel supply assembly, a fuel outlet pipeline, a liquid flow meter, and a second fuel shut-off valve located on the fuel outlet pipeline. The fuel supply assembly is connected to the inlet of the liquid-gas dual-fuel nozzle and is used to supply liquid fuel to the liquid-gas dual-fuel nozzle. One end of the fuel outlet pipeline is connected to the outlet of the liquid-gas dual-fuel nozzle. The liquid flow meter is located on the fuel outlet pipeline and is used to measure the real-time flow rate of the liquid fuel flowing through the fuel outlet pipeline. The fuel supply assembly includes an inlet pipeline with one end connected to the inlet of the liquid-gas dual-fuel nozzle, a fuel rail and a first fuel shut-off valve located on the inlet pipeline. The first fuel shut-off valve is located between the fuel rail and the inlet of the liquid-gas dual-fuel nozzle, and is configured to open the inlet pipeline when the pressure of the fuel rail reaches a preset fuel rail pressure. The second fuel shut-off valve is located between the outlet of the liquid-gas dual-fuel nozzle and the liquid flow meter. A gas flow testing system includes a gas supply assembly, a gas outlet pipeline, a gas flow meter, and a second gas shut-off valve located on the gas outlet pipeline. The gas supply assembly is connected to the inlet of a liquid-gas dual-fuel nozzle and is used to supply gaseous fuel to the nozzle. One end of the gas outlet pipeline is connected to the outlet of the nozzle. The gas flow meter is located on the gas outlet pipeline and is used to measure the real-time flow rate of the gaseous fuel flowing through the pipeline. The gas supply assembly includes an inlet pipeline with one end connected to the inlet of the nozzle, a gas rail, and a first gas shut-off valve located on the inlet pipeline. The first gas shut-off valve is located between the gas rail and the inlet of the nozzle and is configured to open the inlet pipeline when the pressure of the gas rail reaches a preset pressure. The second gas shut-off valve is located between the outlet of the nozzle and the gas flow meter. The controller is electrically connected to the first oil circuit shut-off valve and the first air circuit shut-off valve respectively. The controller is configured to control the first oil circuit shut-off valve to open the oil inlet pipe when the pressure of the oil rail reaches the preset oil rail pressure, and to control the first oil circuit shut-off valve to close the oil inlet pipe after the first oil circuit shut-off valve has opened the oil inlet pipe for a first preset time. The controller is also configured to control the first air circuit shut-off valve to open the air inlet pipe when the pressure of the air rail reaches the preset air rail pressure, and to control the first air circuit shut-off valve to close the air inlet pipe after the first air circuit shut-off valve has opened the air inlet pipe for a second preset time. The controller is electrically connected to the second oil circuit shut-off valve and the second air circuit shut-off valve respectively. The controller is used to control the second oil circuit shut-off valve to close the oil outlet pipe after the first oil circuit shut-off valve opens the oil inlet pipe for the first preset time, and to control the second air circuit shut-off valve to close the air outlet pipe after the first air circuit shut-off valve opens the air inlet pipe for the second preset time.

2. The fuel nozzle flow rate testing system according to claim 1, characterized in that, The fuel nozzle flow test system also includes a data signal acquisition module that is electrically connected to the liquid flow meter, the gas flow meter and the controller respectively; The data signal acquisition module is used to acquire the real-time flow rate of the liquid fuel measured by the liquid flow meter and transmit it to the controller. The data signal acquisition module is also used to acquire the real-time flow rate of the gaseous fuel measured by the gas flow meter and transmit it to the controller. The controller is used to calculate the total flow rate and average flow rate of the liquid fuel flowing through the oil outlet pipeline based on the real-time flow rate of the liquid fuel. The controller is also used to calculate the total flow rate and average flow rate of the gaseous fuel flowing through the gas outlet pipeline based on the real-time flow rate of the gaseous fuel.

3. The fuel nozzle flow rate testing system according to claim 1, characterized in that, The fuel supply assembly also includes a fuel tank connected to one end of the fuel inlet pipeline away from the liquid-gas dual-fuel nozzle, and a fuel supply pump disposed on the fuel inlet pipeline, the fuel supply pump being disposed between the fuel tank and the fuel rail; The controller is electrically connected to the fuel supply pump, and the controller can control the fuel supply pump to output the liquid fuel to the fuel rail so that the pressure of the fuel rail reaches the preset fuel rail pressure.

4. The fuel nozzle flow rate testing system according to claim 1, characterized in that, The air supply assembly includes a first air pressure regulating valve and a pressure stabilizing tank respectively disposed on the air inlet pipeline, wherein the first air pressure regulating valve is located between the pressure stabilizing tank and the air rail; The controller is electrically connected to the first pressure regulating valve, and the controller is used to control the first pressure regulating valve to output the gas fuel to the gas rail so that the pressure of the gas rail reaches the preset gas rail pressure.

5. The fuel nozzle flow rate testing system according to claim 4, characterized in that, The gas supply assembly also includes a gas source and a second pressure regulating valve. The gas source is connected to the end of the air intake pipe away from the liquid-gas dual-fuel nozzle. The second pressure regulating valve is located on the air intake pipe and between the gas source and the pressure stabilizing tank. The controller is electrically connected to the second pressure regulating valve to control the second pressure regulating valve to output the gaseous fuel to the pressure stabilizing tank at a preset inlet pressure.

6. The fuel nozzle flow rate testing system according to claim 1, characterized in that, The gas outlet pipeline includes a main gas outlet and a first gas outlet branch located on both sides of the gas flow meter. The end of the main gas outlet away from the gas flow meter is connected to the outlet of the liquid-gas dual-fuel nozzle, and the end of the first gas outlet branch away from the gas flow meter is connected to the atmosphere. The gas flow testing system also includes a third gas path shut-off valve located on the first gas outlet branch.

7. The fuel nozzle flow rate testing system according to claim 6, characterized in that, The gas outlet pipeline also includes a second gas outlet branch, one end of which is connected in parallel with one end of the first gas outlet branch to the gas flow meter; The gas flow testing system also includes a fourth gas shut-off valve located on the second gas outlet branch, and a gas recovery tank connected to the end of the fourth gas shut-off valve that is away from the gas flow meter.

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