A small flow parameter simulation intake system and test bench

Abstract

A small flow parameter simulation system, the cooling water system is connected to the stable measurement section, the air intake nozzle, the hot air switch and the bypass device cooling device and the tail chamber respectively, to provide cooling water for the cooling of the above components; the liquid fuel supply system and the gas fuel supply system provide fuel for the main air intake path fuel heating device; the oxygen supply system provides liquid oxygen for the main air intake path oxygen supply mixer, which is used for the combustion of fuel in the main air intake path fuel heating device; the particle loading system is for testing loading particles; the process gas system is connected to the operating gas source of the system's pneumatic valves. The small flow parameter simulation system of the present invention can effectively realize the accurate simulation of small flow parameters, can accurately and effectively control the mass flow rate of particles, form an effective closed-loop control system, and effectively observe the test status.

Description

Technical Field

[0001] The invention relates to the technical field of test bench testing, and in particular to a small flow parameter simulation intake system and a test bench. Background Art

[0002] A small flow parameter simulation intake system is an important component of a small flow parameter simulation test bench. However, in the prior art, there is no effective small flow parameter precise simulation test bench to achieve precise simulation of small flow parameters. At the same time, there is no particle loading device that can accurately and effectively control the mass flow rate of particles, and an effective closed-loop control system cannot be formed. In addition, the test state cannot be effectively observed. Therefore, for the precise simulation of small flow parameters, there is an urgent need for a particle loading device that can accurately and effectively control the mass flow rate of particles to form an effective closed-loop control system and a small flow parameter simulation test bench.

[0003] The cooling water system is an important supporting system of the engine test bench, which provides cooling water with corresponding parameter requirements according to the needs of the test bench. For the test bench, it is often necessary to conduct multiple engine tests of different models, usually including small-flow equipment water and large-flow hydraulic dynamometer water, which have different requirements for cooling water parameters. For example: when providing cooling water for the hydraulic dynamometer, the water pressure of the cooling water is required not to fluctuate greatly. When the cooling water system is running, the liquid level of the cold water pool and the hot water pool is required to be maintained within the design range. At the same time, higher requirements are placed on the control of the cold water pump and the hot water pump. When the cooling water passes through the water-using equipment and the hydraulic dynamometer, the water temperature rises. Before it is recycled, it needs to be cooled and cooled to avoid the circulating cooling water from losing its cooling effect due to the excessively high water temperature. In addition, the prior art usually sets the test bench and the cooling water pump room in different areas, which is not convenient for centralized management and operation.

[0004] The process gas system is an important supporting system of the engine test bench. It is the operating gas source for the control valves in the regulating gas circuits of subsystems such as the intake total pressure simulation system and the injection system. However, in the existing technology, the use of process gas is decentralized among the subsystems and lacks systematicity, which makes the operation process complicated and the response speed slow. Summary of the invention

[0005] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a small flow parameter simulation intake system and a test bench.

[0006] The technical solution of the present invention is:

[0007] A small flow parameter simulation intake system includes a main intake path, a cooling water system, a liquid fuel supply system, an oxygen supply system and a gas fuel supply system; the cooling water system is connected to the main intake path stability measurement in the main intake path, and provides cooling water for the main intake path stability measurement section, the intake nozzle and the hot air switching and bypass device cooling device; the liquid fuel supply system and the gas fuel supply system are connected to the main intake path fuel heating device in the main intake path, and provide fuel to the main intake path fuel heating device; the oxygen supply system is connected to the main intake path oxygen supply blender in the main intake path, and provides liquid oxygen to the main intake path oxygen supply blender for combustion of fuel in the main intake path fuel heating device;

[0008] Furthermore, along the gas flow direction from the gas source to the main air intake outlet, the main air intake path includes a main air intake path main shut-off valve, a main air intake path air intake flow meter, a main air intake path pressure regulating valve, a main air intake path first pneumatic ball valve, a main air intake path oxygen supplement mixer, a main air intake path fuel heating device, a main air intake path mixer and a main air intake path stable measuring section, which are connected through a pipeline.

[0009] Furthermore, the main air intake circuit includes a main air intake circuit heating circuit, one end of the main air intake circuit heating circuit is connected to the main air intake circuit pressure regulating valve and the first pneumatic ball valve of the main air intake circuit through a pipeline, and the other end is connected to the main air intake circuit mixer. Along the gas flow direction from the pipeline connecting the main air intake circuit pressure regulating valve and the first pneumatic ball valve of the main air intake circuit to the main air intake circuit mixer, the main air intake circuit heating circuit includes a main air intake circuit second pneumatic ball valve and a main air intake circuit electric heater which are sequentially connected through pipelines.

[0010] Furthermore, the liquid fuel supply system and the oxygen supply system include a common nitrogen source and a pressure reducing valve, and the liquid fuel supply system and the oxygen supply system are arranged in parallel; wherein the liquid fuel supply system includes a liquid fuel supply path for the liquid fuel supply system and a liquid fuel supply system purge path; along the liquid fuel flow direction from the nitrogen source to the main air intake path fuel heating device, the liquid fuel supply path for the liquid fuel supply system includes a pressure reducing valve, a first solenoid valve of the liquid fuel supply system, a fuel tank, a filter of the liquid fuel supply system, a second solenoid valve of the liquid fuel supply system, a flow meter of the liquid fuel supply system, a regulating valve of the liquid fuel supply system and a third solenoid valve of the liquid fuel supply system connected through a pipeline; one end of the liquid fuel supply system purge path is connected to the pipeline between the pressure reducing valve and the first solenoid valve of the liquid fuel supply system, and the other end is connected to the pipeline between the pressure reducing valve and the first solenoid valve of the liquid fuel supply system The pipeline between the second solenoid valve of the liquid fuel supply system and the flowmeter of the liquid fuel supply system is connected, and the fourth solenoid valve of the liquid fuel supply system is arranged on the blowing path of the liquid fuel supply system; the oxygen supplementation system includes a liquid oxygen supply path of the oxygen supplementation system and a blowing path of the oxygen supplementation system, and the liquid oxygen flows along the nitrogen source to the oxygen supplementation blender of the main air intake path. The liquid oxygen supply path of the oxygen supplementation system includes a pressure reducing valve, a first solenoid valve of the oxygen supplementation system, a liquid oxygen storage tank, a second solenoid valve of the oxygen supplementation system, a flowmeter of the oxygen supplementation system, a regulating valve of the oxygen supplementation system and a third solenoid valve of the oxygen supplementation system connected through the pipeline; one end of the blowing path of the oxygen supplementation system is connected to the pipeline connecting the pressure reducing valve and the first solenoid valve of the oxygen supplementation system, and the other end is connected to the pipeline connecting the second solenoid valve of the oxygen supplementation system and the flowmeter of the oxygen supplementation system, and the fourth solenoid valve of the oxygen supplementation system is arranged on the blowing path of the oxygen supplementation system.

[0011] Furthermore, along the flow direction of gas fuel from the gas cylinder to the main air inlet fuel heating device, the gas fuel supply system includes a gas cylinder, a first solenoid valve of the gas fuel supply system, a gas fuel supply system pressure reducing valve, a gas fuel supply system regulating valve, a gas fuel supply system flow meter and a second solenoid valve of the gas fuel supply system, which are sequentially connected through pipelines.

[0012] A test bench includes the above-mentioned small flow parameter simulation intake system, characterized in that it includes a particle loading system, a hot air switching and bypass device, an exhaust device and a process gas system; the cooling water system is respectively connected to the intake nozzle in the particle loading system and the hot air switching and bypass device in the hot air switching and bypass device, and is a cooling device for the intake nozzle and the hot air switching and bypass device; the two ends of the particle loading system are respectively connected to the outlet of the main air intake path and the inlet of the exhaust device; the two ends of the hot air switching and bypass device are respectively connected to the outlet of the main air intake path and the exhaust device; the process gas system is respectively connected to the operating air source of the pneumatic valves of the main air intake path, the liquid fuel supply system, the oxygen supplementation system, and the gas fuel supply system.

[0013] Furthermore, the cooling water system includes a cooling water input circuit, a water tank, a cooling water main supply circuit, an intake nozzle cooling circuit, a main intake circuit stable measurement section cooling circuit, and a hot air switching and bypass device cooling circuit; the water tank includes a cooling water injection port, a cooling water outlet and a return port, and the water tank includes a water tank level gauge and a water temperature measuring point; along the tap water inlet to the cooling water injection port of the water tank, the cooling water input circuit includes a cooling water input circuit manual stop valve connected by a pipeline, a cooling water input circuit filter and a cooling water input circuit stable section; along the cooling water outlet of the water tank to the intake nozzle cooling circuit, the main intake circuit stable measurement section cooling circuit, the exhaust device cooling circuit , the inlet of the cooling circuit of the hot air switching and bypass device, the cooling water main supply circuit includes a cooling water main supply circuit stabilizing section connected by a pipeline, a cooling water main supply circuit filter, a cooling water main supply circuit water pump and a cooling water main supply circuit pressure measuring point; the intake nozzle cooling circuit includes an intake nozzle cooling water supply circuit and an intake nozzle cooling circuit return circuit. Along the flow direction of the cooling water, the two ends of the intake nozzle cooling water supply circuit are respectively connected with the outlet of the cooling water main supply circuit and the inlet of the cooling pipeline of the intake nozzle. Along the flow direction of the cooling water, the intake nozzle cooling water supply circuit is sequentially provided with an intake nozzle cooling circuit flowmeter and an intake nozzle cooling circuit stabilizing section. The two ends of the return water path of the air nozzle cooling circuit are respectively connected with the cooling pipe outlet of the air intake nozzle and the return water port of the water tank, and an air intake nozzle cooling circuit temperature measuring point is arranged on the return water path of the air intake nozzle cooling circuit; the cooling circuit of the main air intake circuit stable measurement section includes the cooling water supply path of the main air intake circuit stable measurement section and the cooling water return path of the main air intake circuit stable measurement section. Along the flow direction of the cooling water, the two ends of the cooling water supply path of the main air intake circuit stable measurement section are respectively connected with the outlet of the cooling water main supply path and the cooling pipe inlet of the main air intake circuit stable measurement section. Along the flow direction of the cooling water, the cooling water supply path of the main air intake circuit stable measurement section is sequentially arranged with the main air intake circuit stable measurement section. Cooling circuit flow meter and main air intake circuit stable measuring section cooling circuit stable section; both ends of the cooling circuit return circuit of the main air intake circuit stable measuring section are respectively connected with the cooling pipe outlet of the main air intake circuit stable measuring section and the return water port of the water tank, and the cooling circuit return circuit of the main air intake circuit stable measuring section is provided with a main air intake circuit stable measuring section cooling circuit temperature measuring point; along the flow direction of cooling water, both ends of the hot air switching and bypass device cooling circuit are respectively connected with the outlet of the cooling water main supply circuit and the inlet of the cooling water pipeline of the cooling device in the hot air switching and bypass device cooling circuit, and the hot air switching and bypass device cooling circuit is provided with a hot air switching and bypass device stable section.

[0014] Furthermore, the particle loading system includes a hopper, particles, a glass tube, a dust flowmeter, a pressure reducing valve, a venting solenoid valve, a discharge valve and an air source for the particle loading device; the air source for the particle loading device is connected to the pressure reducing valve, and the outlet of the pressure reducing valve is connected to the hopper and the venting solenoid valve through pipelines respectively; the hopper includes a hopper body, a hopper upper cover is arranged on the hopper body, a particle pressing plate is arranged in the hopper body, a gap is arranged between the particle pressing plate and the inner wall of the hopper body or a small hole is opened on the particle pressing plate, the particles are placed in the hopper body and are located between the outlet of the hopper body and the particle pressing plate; the outlet of the hopper body is connected to the glass tube, and a dust flowmeter and a discharge valve are arranged in sequence on the glass tube along the flow direction of the particles. The particle loading system comprises an intake pipe, an intake nozzle, an exhaust nozzle, a combustion device, and a test bench; a glass catheter is inserted into the intake pipe, the intake pipe, the intake nozzle, the combustion device, and the exhaust nozzle are connected in sequence, and the combustion device is placed on the test bench; the intake pipe is connected with the outlet of the main intake path, and the exhaust nozzle is connected with the exhaust device; the combustion device is a rectangular parallelepiped structure, which is composed of transparent tempered glass, the internal aerodynamic contours of the intake nozzle and the exhaust nozzle are Laval nozzle structures, and quartz glass windows are arranged on the sides of the intake nozzle and the exhaust nozzle; the position where the glass catheter is inserted into the intake pipe is located above the center line of the intake pipe.

[0015] Furthermore, along the gas flow direction from the outlet of the main air intake path to the exhaust device mixing section in the exhaust device, the hot air switching and bypass device is connected, including a hot air switching and bypass device cooling device and a hot air switching and bypass device solenoid valve arranged in sequence.

[0016] Furthermore, the process gas system includes an air intake path, a plurality of process gas supply paths arranged in parallel, each process gas supply path includes a plurality of process gas output paths; the two ends of the air intake path are respectively connected to a compressed air source and an inlet of a plurality of process gas supply paths arranged in parallel, and a solenoid valve is arranged on the air intake path; the two ends of each process gas supply path are respectively connected to an outlet of the air intake path and a plurality of process gas output paths, and along the flow direction of the process gas, each process gas supply path includes a process gas supply path manual shut-off valve, an air filter, and a first pressure reducing valve which are sequentially connected through pipelines. , a first pressure gauge, a second pressure reducing valve, a second pressure gauge and a buffer tank; both ends of each process gas output path are respectively connected with an outlet of a process gas supply path and an operating gas source; along the flow direction of the process gas, each process gas output path includes a process gas output path manual stop valve, a stop valve, a pressure measuring point and an operating gas source which are sequentially connected through pipelines; the operating gas source is at least one of the main air inlet pressure regulating valve, the first pneumatic ball valve of the main air inlet, the process gas, a liquid fuel supply system regulating valve, an oxygen supplement system regulating valve or a gas fuel supply system regulating valve.

[0017] The advantages of the present invention compared with the prior art are:

[0018] 1. The small flow rate inlet parameter simulation intake system and test bench of the present invention can effectively realize the accurate simulation of small flow rate inlet parameters, can accurately and effectively control the mass flow rate of particles, form an effective closed-loop control system, and effectively observe the test state.

[0019] 2. In the small flow parameter simulation intake system and test bench of the present invention, the cooling water system can effectively realize the cooling of the stable measurement section of the main intake path, the intake nozzle and the bypass device, and recycle the low-temperature cooling water, which not only meets the needs of the test, but also saves water resources, and takes into account both practicality and economy; by setting a cooling water input path filter and a cooling water main supply path filter, the cleanliness of the cooling water is improved and scaling of the cold water path is avoided; by setting a water tank level gauge and a water temperature measuring point, the liquid level and water temperature of the water tank are effectively monitored so that the water temperature of the supplied cooling water reaches a predetermined value; at the same time, a cooling water main supply path pressure measuring point is set to adjust the cooling water main supply path water pump, so as to meet the pressure of the supplied cooling water to meet the predetermined value, and in addition , by setting the intake nozzle cooling path flow meter and the main intake path stable measurement section cooling path flow meter, the cooling water volume of the cooling object is monitored to ensure that the cooling water supply reaches the predetermined value; finally, by setting the intake nozzle cooling path temperature measuring point and the main intake path stable measurement section cooling path temperature measuring point, the heat exchange efficiency of the cooling water system to the heat exchange object is monitored to ensure the accuracy of the test bench and the cooling accuracy of the cooled object; by setting the cooling water input path main intake path stable measurement section, the cooling water total supply path main intake path stable measurement section, the intake nozzle cooling path main intake path stable measurement section, the main intake path stable measurement section of the cooling path main intake path and the hot air switching and bypass device main intake path stable measurement section, the stability of the water supply is ensured, thereby improving the stability of the entire test bench.

[0020] 3. In the small flow parameter simulation intake system and test bench of the present invention, the oxygen supplement system can accurately control the opening and closing of the oxygen valve, and adopts nitrogen pressurization to avoid the explosion of the oxygen pipeline, taking into account both safety and applicability; by setting the monitoring of relevant valves and pressure gauges, the relevant parameters of the entire supply system can be monitored in time and effectively, thereby improving the accuracy of the entire supply system, and at the same time, avoiding the explosion of the oxygen pipeline; a nitrogen blow-off path is set, and a parallel filling pipe blow-off path, a main pipe blow-off path and a pre-spray pipe blow-off path are set in a targeted manner to effectively blow off the key parts of the liquid oxygen supply path to avoid the explosion of the oxygen pipeline caused by grease or high-speed iron filings in the pipeline.

[0021] 4. In the small flow parameter simulation intake system and test bench of the present invention, the particle loading system first determines the inner diameter of the glass tube according to the particle flow rate, and then the pressure in the hopper is adjusted and controlled by the pressure reducing valve and the air release solenoid valve. A dust mass flowmeter is set on the glass tube to form a closed-loop control system. A gap is left between the particle pressing plate and the edge of the hopper or a small hole is opened on the particle pressing plate to control a small amount of air to enter the particles. The outlet of the glass tube is located on the upper part of the center line of the intake pipe, and the distance between them is controlled to control the distribution of particles on the cross section of the intake pipe. The combustion device is set as a transparent structure. At the same time, quartz glass windows are set on the sides of the intake nozzle and the exhaust nozzle to realize the observation of the test device.

[0022] 5. In the small flow parameter simulation intake system and test bench of the present invention, the hot air switching and bypass device, when the state parameters of the intake simulation system do not reach the required value (especially when using an electric heater), open the bypass, and the intake airflow flows into the exhaust device through the bypass, reducing the heat load of the test section. By adding a cooling device, the temperature of the bypass gas is reduced, and then the temperature entering the exhaust device is reduced, thereby improving the ejection capacity of the subsequent ejector and reducing the required material performance of the muffler, thereby reducing the cost. By setting an inlet Laval nozzle on the main intake path and at the front end of the entrance of the test section and the bypass, the control of the supersonic intake flow rate is achieved, the stable input of the intake flow rate is achieved, the setting of the intake valve is reduced, and the cost of the entire test bench is reduced. The valve is set as a solenoid valve, and the corresponding speed of the valve is increased, thereby improving the efficiency of the test.

[0023] 6. In the small flow parameter simulation intake system and test bench of the present invention, the process gas system systematically integrates the process gas required by each subsystem, and has a simple structural setting, easy operation, and fast response speed. By setting an air filter, the purity of the process gas is improved, the service life of the valve is extended, and the adjustment accuracy is improved. By two-stage pressure reduction, the adjustment range of the process gas is improved to expand the application range of the process gas system. By setting a buffer tank, the process gas is buffered in the buffer tank, and the process gas used in each process gas output path is the gas in the buffer tank, so that the response speed and stability are improved. By setting a first pressure gauge and a second pressure gauge, the monitoring of the process gas pressure after passing through the first pressure reducing valve and the second pressure reducing valve is realized, thereby improving the accuracy of the process gas system. By setting a pressure measuring point, the monitoring of the gas source pressure of each operating gas source is realized to ensure that the pressure supplied to the operating gas source meets the predetermined value requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the principle of a test bench for simulating an intake system with small flow parameters of the present invention.

[0025] Figure 2It is a schematic diagram of the principle of the cooling water system in the test bench of the present invention which has small flow parameters to simulate the intake system.

[0026] Figure 3 It is a schematic diagram of the principle of the particle loading system in the test bench of the present invention having a small flow parameter to simulate the intake system.

[0027] Figure 4 It is a schematic diagram of the principle of the process gas system in the test bench of the present invention having a small flow parameter simulation intake system. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-4As shown, a small flow parameter simulation intake system includes a main intake path 100, a cooling water system 200, a liquid fuel supply system 300, an oxygen supply system 400, and a gas fuel supply system 500. The cooling water system 200 is connected to the main intake path stable measurement section 111 in the main intake path 100, and provides cooling water for the main intake path stable measurement section 111. The liquid fuel supply system 300 and the gas fuel supply system 500 are connected to the main intake path fuel heating device 107 in the main intake path 100, and provide fuel for the main intake path fuel heating device 107. The oxygen supply system 400 is connected to the main intake path oxygen supply blender 106 in the main intake path 100, and provides liquid oxygen to the main intake path oxygen supply blender 106 for combustion of fuel in the main intake path fuel heating device 107. Preferably, along the gas flow direction from the gas source to the outlet of the main air intake path 100, the main air intake path 100 includes 101 connected by a pipeline, a main air intake path main stop valve 102, a main air intake path air flow meter 103, a main air intake path pressure regulating valve 104, a main air intake path first pneumatic ball valve 105, a main air intake path oxygen supplement mixer 106, a main air intake path fuel heating device 107, a main air intake path mixer 108 and a main air intake path stable measurement section 111. Among them, the main air intake path stable measurement section 111 is used to rectify the airflow in the main air intake path so that the airflow in the main air intake path is stable, and at the same time, the temperature, pressure and flow rate of the airflow in the main air intake path are monitored. The small flow rate incoming flow parameter simulation system of the present invention can effectively realize the accurate simulation of small flow rate incoming flow parameters, can accurately and effectively control the mass flow rate of particles, form an effective closed-loop control system, and effectively observe the test state.

[0031] Preferably, the main air intake path 100 includes a main air intake path heating path, one end of the main air intake path heating path is connected to the pipeline connecting the main air intake path pressure regulating valve 104 and the first main air intake path pneumatic ball valve 105, and the other end is connected to the main air intake path blender 108. Along the gas flow direction from the pipeline connecting the main air intake path pressure regulating valve 104 and the first main air intake path pneumatic ball valve 105 to the main air intake path blender 108, the main air intake path heating path includes a main air intake path second pneumatic ball valve 109 and a main air intake path electric heater 110 which are sequentially connected through the pipeline. By setting the main air intake path heating path, the air mixed into the main air intake path blender 108 is preheated, the mixing efficiency is improved, and the load of the main air intake path fuel heating device 107 is reduced. In addition, by setting the second main air intake path pneumatic ball valve, the flow rate of the mixed air is achieved.

[0032] Preferably, the liquid fuel supply system 300 and the oxygen supply system 400 include a common nitrogen source and a pressure reducing valve 350, and the liquid fuel supply system 300 and the oxygen supply system 400 are arranged in parallel; wherein, the liquid fuel supply system 300 includes a liquid fuel supply system fuel supply path 310 and a liquid fuel supply system blow-off path 320, and the liquid fuel flow direction from the nitrogen source to the main intake path fuel heating device 107, the liquid fuel supply system fuel supply path 310 includes a pressure reducing valve 350, a liquid fuel supply system first solenoid valve 301, a fuel tank 330, a liquid fuel supply system filter 302, a liquid fuel supply system second solenoid valve 303, a liquid fuel supply system flow meter 304, a liquid fuel supply system regulating valve 305 and a liquid fuel supply system third solenoid valve 306 connected by a pipeline; one end of the liquid fuel supply system blow-off path 320 is connected to the pipeline connecting the pressure reducing valve 350 and the first solenoid valve 301 of the liquid fuel supply system, and the other end is connected to the pipeline connecting the liquid fuel The pipeline between the second solenoid valve 303 of the liquid fuel supply system and the flow meter 304 of the liquid fuel supply system is connected, and the fourth solenoid valve 307 of the liquid fuel supply system is arranged on the blow-off path 320 of the liquid fuel supply system; the oxygen supplementation system 400 includes an oxygen supplementation system liquid oxygen supply path 410 and an oxygen supplementation system blow-off path 420, and the liquid oxygen flow direction from the nitrogen source to the main air inlet oxygen supplementation blender 106, the oxygen supplementation system liquid oxygen supply path 410 includes a pressure reducing valve 350 connected by a pipeline, and the first solenoid valve 420 of the oxygen supplementation system is connected to the main air inlet oxygen supplementation blender 106. 01, liquid oxygen storage tank 430, second solenoid valve 402 of oxygen supplementation system, flow meter 403 of oxygen supplementation system, regulating valve 404 of oxygen supplementation system and third solenoid valve 405 of oxygen supplementation system; one end of the oxygen supplementation system purge path 420 is connected with the pipeline connecting between the pressure reducing valve 350 and the first solenoid valve 401 of oxygen supplementation system, and the other end is connected with the pipeline connecting between the second solenoid valve 402 of oxygen supplementation system and the flow meter 403 of oxygen supplementation system; the fourth solenoid valve 406 of oxygen supplementation system is arranged on the purge path 420 of oxygen supplementation system. The oxygen supply system can accurately control the opening and closing of the oxygen valve, and adopts nitrogen pressurization to avoid the explosion of the oxygen pipeline, taking into account both safety and applicability; by setting the monitoring of relevant valves and pressure gauges, it can timely and effectively monitor the relevant parameters of the entire supply system, thereby improving the accuracy of the entire supply system, and at the same time, avoiding the explosion of the oxygen pipeline; a nitrogen blow-off path is set, and a parallel filling pipe blow-off path, a main pipe blow-off path and a pre-spray pipe blow-off path are set in a targeted manner to effectively blow off the key parts of the liquid oxygen supply path to avoid grease or high-speed iron filings in the pipeline causing the oxygen pipeline to explode.

[0033] Preferably, along the gas fuel flow direction from the gas cylinder to the main air inlet fuel heating device 107, the gas fuel supply system 500 includes a gas cylinder 501, a first solenoid valve 502 of the gas fuel supply system, a gas fuel supply system pressure reducing valve 503, a gas fuel supply system regulating valve 504, a gas fuel supply system flow meter 505 and a gas fuel supply system second solenoid valve 506, which are sequentially connected through pipelines. By setting valves and flow meters, the flow of gas fuel is regulated and monitored, thereby improving the accuracy of the entire system.

[0034] A test bench includes the above-mentioned small flow parameter simulation intake system, a particle loading system 600, a hot air switching and bypass device 700, an exhaust device 800 and a process gas system 900. The cooling water system 200 is respectively connected to the intake nozzle 622 in the particle loading system 600 and the hot air switching and bypass device cooling device 710 in the hot air switching and bypass device 700, and provides cooling water for the intake nozzle 622 and the hot air switching and bypass device cooling device 710. The two ends of the particle loading system 600 are respectively connected to the outlet of the main intake path 100 and the inlet of the exhaust device 800, and the two ends of the hot air switching and bypass device 700 are respectively connected to the outlet of the main intake path 100 and the exhaust device 800. The process gas system 900 is respectively connected to the operating gas sources of the pneumatic valves of the main intake path 100, the liquid fuel supply system 300, the oxygen supplement system 400 and the gas fuel supply system 500.

[0035] Preferably, the cooling water system 200 includes a cooling water input circuit 210, a water tank 214, a cooling water main supply circuit 220, an air intake nozzle cooling circuit 230, a main air intake circuit stabilization measurement section cooling circuit 240, and a hot air switching and bypass device cooling circuit 260; the water tank 214 includes a cooling water injection port, a cooling water outlet and a return water port, the water tank 214 includes a water tank level gauge 215 and a water temperature measuring point 216; along the tap water inlet to the cooling water injection port of the water tank 214, the cooling water input circuit 210 includes a cooling water input circuit manual stop valve 211 connected by a pipeline, a cooling water input circuit filter 212 and a cooling water input circuit stabilization section 213; along the cooling water outlet of the water tank 214, a cooling water supply line 210 is connected to the cooling water supply line 211 by a pipeline, a cooling water supply line filter 212 and a cooling water supply line ... The inlet of the air intake nozzle cooling path 230, the main air intake path stable measurement section cooling path 240, the exhaust device cooling path 250, and the inlet of the hot air switching and bypass device cooling path 260, the cooling water main supply path 220 includes a cooling water main supply path stable section 221 connected by a pipeline, a cooling water main supply path filter 222, a cooling water main supply path water pump 223 and a cooling water main supply path pressure measuring point 224; the air intake nozzle cooling path 230 includes an air intake nozzle cooling water supply path 232 and an air intake nozzle cooling water return path 233, along the flow direction of the cooling water, the two ends of the air intake nozzle cooling water supply path 232 are respectively connected to the outlet of the cooling water main supply path 220 and the outlet of the air intake nozzle 622 The cooling pipe inlet is connected, and along the flow direction of the cooling water, the intake nozzle cooling water supply path 232 is sequentially provided with an intake nozzle cooling path flow meter 234 and an intake nozzle cooling path stabilization section 235, and the two ends of the intake nozzle cooling path return water path 233 are respectively connected with the cooling pipe outlet of the intake nozzle 231 and the return water port of the water tank 214, and an intake nozzle cooling path temperature measuring point 236 is arranged on the intake nozzle cooling path return water path 233; the main intake path stabilization measurement section cooling path 240 includes a main intake path stabilization measurement section cooling water supply path 242 and a main intake path stabilization measurement section cooling water return path 243, and along the flow direction of the cooling water, the main intake path stabilization measurement section cooling water supply path 2 The two ends of the cooling water supply passage 242 are respectively connected with the outlet of the cooling water supply passage 220 and the cooling pipe inlet of the main air intake stable measurement section 111. Along the flow direction of the cooling water, the cooling water supply passage 242 of the main air intake stable measurement section is provided with a main air intake stable measurement section cooling passage flow meter 244 and a main air intake stable measurement section cooling passage stabilizing section 245 in sequence; the two ends of the cooling water return passage 243 of the main air intake stable measurement section are respectively connected with the cooling pipe outlet of the main air intake stable measurement section 241 and the return water port of the water tank 214, and the cooling water return passage 243 of the main air intake stable measurement section is provided with a main air intake stable measurement section cooling passage temperature measuring point 246; along the flow direction of the cooling water;Along the flow direction of cooling water, the two ends of the hot air switching and bypass device cooling path 260 are respectively connected to the outlet of the cooling water main supply path 220 and the inlet of the cooling water pipeline of the cooling device 710 in the hot air switching and bypass device cooling path 109260, and the hot air switching and bypass device cooling path 260 is provided with a hot air switching and bypass device stabilizing section 262. The cooling water system can effectively realize the cooling of the stable measuring section of the main air intake path, the air intake nozzle, the exhaust device and the bypass device, and recycle the low-temperature cooling water, which not only meets the needs of the test, but also saves water resources, and takes into account both practicality and economy; by setting a cooling water input path filter and a cooling water main supply path filter, the cleanliness of the cooling water is improved and scaling of the cold water path is avoided; by setting a water tank level gauge and a water temperature measuring point, the liquid level and water temperature of the water tank are effectively monitored so that the water temperature of the supplied cooling water reaches a predetermined value; at the same time, a cooling water main supply path pressure measuring point is set to adjust the cooling water main supply path water pump, so as to meet the pressure of the supplied cooling water to meet the predetermined value. In addition, by setting an air intake nozzle The cooling circuit flow meter and the main air intake circuit stable measurement section cooling circuit flow meter monitor the cooling water volume of the cooling object to ensure that the cooling water supply reaches the preset value; finally, by setting the intake nozzle cooling circuit temperature measurement point and the main air intake circuit stable measurement section cooling circuit temperature measurement point, the cooling water system monitors the heat exchange efficiency of the heat exchange object to ensure the accuracy of the test bench and the cooling accuracy of the cooled object; by setting the cooling water input circuit main air intake circuit stable measurement section, the cooling water total supply circuit main air intake circuit stable measurement section, the intake nozzle cooling circuit main air intake circuit stable measurement section, the main air intake circuit stable measurement section of the cooling circuit main air intake circuit and the hot air switching and bypass device main air intake circuit stable measurement section, the stability of the water supply is ensured, thereby improving the stability of the entire test bench. ;

[0036] Preferably, the particle loading system 600 includes a hopper 601, particles 604, a glass tube 605, a dust flowmeter 606, a pressure reducing valve 607, a venting solenoid valve 608, a discharge valve 609 and an air source 630 for a particle loading device; the air source 630 for the particle loading device is communicated with the pressure reducing valve 607, and the outlet of the pressure reducing valve 607 is communicated with the hopper 601 and the venting solenoid valve 608 through pipelines respectively; the hopper 601 includes a hopper body, a hopper upper cover 602 is provided on the hopper body, a particle pressing plate 603 is provided in the hopper body, a gap is provided between the particle pressing plate 603 and the inner wall of the hopper body or a small hole is provided on the particle pressing plate 603, and the particle 604 is placed in the hopper body and located between the outlet of the hopper body and the particle pressing plate 603; the outlet of the hopper body is communicated with the glass tube 605, and the flow of the particles along the glass tube 605 is controlled by the flow meter 606; The dust flow meter 606 and the discharge valve 609 are arranged in sequence in the moving direction; the particle loading system 600 also includes an air intake pipe 621, an air intake nozzle 622, an exhaust nozzle 623, a combustion device 624, and a test bench 625; the glass conduit 605 is inserted into the air intake pipe 621, the air intake pipe 621, the air intake nozzle 622, the combustion device 624, and the exhaust nozzle 623 are connected in sequence, and the combustion device is placed on the test bench 625; the air intake pipe 6 21 is connected to the outlet of the main air inlet 100, and the exhaust nozzle 623 is connected to the exhaust device 800; the combustion device 624 is a rectangular parallelepiped structure, which is made of transparent tempered glass. The internal aerodynamic profiles of the air inlet nozzle 622 and the exhaust nozzle 623 are Laval nozzle structures, and the sides of the air inlet nozzle and the exhaust nozzle are provided with quartz glass windows; the position where the glass conduit 605 is inserted into the air inlet pipe 621 is located above the center line of the air inlet pipe. Preferably, the inner wall of the glass conduit 605 is a smooth surface to facilitate the flow of particles.

[0037] Further preferably, the discharge valve 609 is a plug-in type discharge valve. The particle loading system first determines the inner diameter of the glass conduit according to the particle flow rate, and then adjusts and controls the pressure in the hopper by the pressure reducing valve and the air release solenoid valve. A dust mass flow meter is set on the glass conduit to form a closed-loop control system. A gap is left between the particle pressing plate and the edge of the hopper or a small hole is opened on the particle pressing plate to control a small amount of air to enter the particles. The outlet of the glass conduit is located at the upper part of the center line of the intake pipe, and the distance between them is controlled to control the distribution of particles on the cross section of the intake pipe. The combustion device is set as a transparent structure. At the same time, quartz glass windows are set on the sides of the intake nozzle and the exhaust nozzle to realize the observation of the test device.

[0038] Preferably, along the gas flow direction from the outlet of the main air intake path 100 to the exhaust device 800, the hot air switching and bypass device 700 connected includes a hot air switching and bypass device cooling device 710 and a hot air switching and bypass device solenoid valve 720 arranged in sequence. When the state parameter of the air intake simulation system does not reach the required value (especially when an electric heater is used), the hot air switching and bypass device opens the bypass, and the intake air flow flows into the exhaust device through the bypass, reducing the heat load of the test section. By adding a cooling device, the temperature of the bypass gas is reduced, and then the temperature entering the exhaust device is reduced, thereby improving the ejection capacity of the subsequent ejector and reducing the required material performance of the muffler, thereby reducing the cost. By arranging an inlet Laval nozzle on the main air intake path and at the front end of the entrance of the test section and the bypass, the control of the supersonic intake flow is realized, the stable input of the intake flow is realized, the setting of the intake valve is reduced, and the cost of the entire test bench is reduced. The valve is set as a solenoid valve, and the corresponding speed of the valve is increased, thereby improving the efficiency of the test.

[0039] Preferably, the process gas system 900 includes an air inlet circuit 910, and a plurality of process gas supply circuits 920 arranged in parallel, and each of the process gas supply circuits 920 includes a plurality of process gas output circuits 930. The two ends of the air inlet circuit 910 are respectively connected to a compressed air source and the inlets of the plurality of process gas supply circuits 920 arranged in parallel, and a solenoid valve 911 is provided on the air inlet circuit 910; the two ends of each process gas supply circuit 920 are respectively connected to the outlet of the air inlet circuit 910 and the plurality of process gas output circuits 930, and along the flow direction of the process gas, each process gas supply circuit 920 includes a process gas supply circuit manual stop valve 921, an air filter 922, a first pressure reducing valve 923, a first pressure gauge 926, a second pressure reducing valve 924, a second pressure gauge 927 and a buffer tank 925, which are sequentially connected through pipelines; The two ends of the process gas output path 930 are respectively connected to the outlet of a process gas supply path 920 and an operating gas source; along the flow direction of the process gas, each process gas output path 930 includes a process gas output path manual shut-off valve 931, a shut-off valve 932, a pressure measuring point 933 and an operating gas source 934 which are sequentially connected through pipelines; the operating gas source 934 is at least one of the pneumatic valves of the main air intake path pressure regulating valve 104, the first pneumatic ball valve 105 of the main air intake path, the second pneumatic ball valve 109 of the main air intake path, the liquid fuel supply system regulating valve 305, the oxygen supplement system regulating valve 404 or the gas fuel supply system regulating valve 504.

[0040] The process gas system systematically integrates the process gas required by each subsystem, has a simple structural setting, is easy to operate, and has a fast response speed. By setting an air filter, the purity of the process gas is improved, the service life of the valve is extended, and the adjustment accuracy is improved. By two-stage pressure reduction, the adjustment range of the process gas is improved, so that the application range of the process gas system is larger. By setting a buffer tank, the process gas is buffered in the buffer tank, and the process gas used in each process gas output line is the gas in the buffer tank, so that the response speed and stability are improved. By setting a first pressure gauge and a second pressure gauge, the monitoring of the process gas pressure after passing through the first pressure reducing valve and the second pressure reducing valve is realized, thereby improving the accuracy of the process gas system. By setting a pressure measuring point, the monitoring of the gas source pressure of each operating gas source is realized to ensure that the pressure supplied to the operating gas source meets the predetermined value requirement.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A small flow parameter simulation intake system, characterized in that: It includes main air intake circuit, cooling water system, liquid fuel supply system, oxygen supplement system and gas fuel supply system; The cooling water system is connected to the main air intake path stability measurement in the main air intake path, and provides cooling water to the main air intake path stability measurement section, the air intake nozzle and the hot air switching and bypass device cooling device; The liquid fuel supply system and the gas fuel supply system are in communication with a main air intake path fuel heating device in the main air intake path to supply fuel to the main air intake path fuel heating device; The oxygen supply system is connected to the main air intake oxygen supply mixer in the main air intake path to provide liquid oxygen to the main air intake oxygen supply mixer for combustion of fuel in the main air intake path fuel heating device; Along the gas flow direction from the gas source to the outlet of the main air inlet, the main air inlet includes, connected through a pipeline, a main air inlet main stop valve, a main air inlet air flow meter, a main air inlet pressure regulating valve, a main air inlet first pneumatic ball valve, a main air inlet oxygen mixer, a main air inlet fuel heating device, a main air inlet mixer and a main air inlet stable measuring section; The liquid fuel supply system and the oxygen supply system include a common nitrogen source and a pressure reducing valve, and the liquid fuel supply system and the oxygen supply system are arranged in parallel; wherein, The liquid fuel supply system includes a liquid fuel supply system fuel supply path and a liquid fuel supply system blow-off path; Along the liquid fuel flow direction from the nitrogen source to the main air intake fuel heating device, the liquid fuel supply system fuel supply path includes a pressure reducing valve, a first solenoid valve of the liquid fuel supply system, a fuel tank, a filter of the liquid fuel supply system, a second solenoid valve of the liquid fuel supply system, a flow meter of the liquid fuel supply system, a regulating valve of the liquid fuel supply system and a third solenoid valve of the liquid fuel supply system connected through a pipeline; One end of the liquid fuel supply system blow-off path is connected to the pipeline between the pressure reducing valve and the first solenoid valve of the liquid fuel supply system, and the other end is connected to the pipeline between the second solenoid valve of the liquid fuel supply system and the flow meter of the liquid fuel supply system. The liquid fuel supply system blow-off path is provided with a fourth solenoid valve of the liquid fuel supply system; The oxygen supplementation system includes an oxygen supplementation system liquid oxygen supply path and an oxygen supplementation system purge path, and the liquid oxygen flows along the nitrogen source to the main air inlet oxygen supplementation blender. The oxygen supplementation system liquid oxygen supply path includes a pressure reducing valve connected through a pipeline, a first solenoid valve of the oxygen supplementation system, a liquid oxygen storage tank, a second solenoid valve of the oxygen supplementation system, a flow meter of the oxygen supplementation system, a regulating valve of the oxygen supplementation system and a third solenoid valve of the oxygen supplementation system; One end of the oxygen supplement system purge path is connected to the pipeline connecting the pressure reducing valve and the first solenoid valve of the oxygen supplement system, and the other end is connected to the pipeline connecting the second solenoid valve of the oxygen supplement system and the flow meter of the oxygen supplement system. The fourth solenoid valve of the oxygen supplement system is arranged on the oxygen supplement system purge path.

2. The system according to claim 1, characterized in that The main air intake circuit includes a main air intake circuit heating circuit, one end of the main air intake circuit heating circuit is connected to the main air intake circuit pressure regulating valve and the first pneumatic ball valve of the main air intake circuit through a pipeline, and the other end is connected to the main air intake circuit mixer. Along the gas flow direction from the pipeline connecting the main air intake circuit pressure regulating valve and the first pneumatic ball valve of the main air intake circuit to the main air intake circuit mixer, the main air intake circuit heating circuit includes a main air intake circuit second pneumatic ball valve and a main air intake circuit electric heater which are sequentially connected through pipelines.

3. The system according to claim 1, characterized in that Along the flow direction of gas fuel from the gas cylinder to the main air inlet fuel heating device, the gas fuel supply system includes a gas cylinder, a first solenoid valve of the gas fuel supply system, a gas fuel supply system pressure reducing valve, a gas fuel supply system regulating valve, a gas fuel supply system flow meter and a second solenoid valve of the gas fuel supply system, which are sequentially connected through pipelines.

4. A test bench, comprising the small flow parameter simulation intake system according to any one of claims 1 to 3, characterized in that: It includes a particle loading system, a hot air switching and bypass device, an exhaust device and a process gas system; the cooling water system is respectively connected to the air intake nozzle in the particle loading system and the hot air switching and bypass device in the hot air switching and bypass device, and is a cooling device for the air intake nozzle and the hot air switching and bypass device; the two ends of the particle loading system are respectively connected to the outlet of the main air intake path and the inlet of the exhaust device; the two ends of the hot air switching and bypass device are respectively connected to the outlet of the main air intake path and the exhaust device; the process gas system is respectively connected to the operating gas source of the pneumatic valve of the main air intake path, the liquid fuel supply system, the oxygen supplementation system, and the gas fuel supply system.

5. The test bench according to claim 4, characterized in that The cooling water system includes a cooling water input circuit, a water tank, a cooling water main supply circuit, an air intake nozzle cooling circuit, a main air intake circuit stable measurement section cooling circuit, and a hot air switching and bypass device cooling circuit; The water tank includes a cooling water inlet, a cooling water outlet and a water return inlet, and the water tank includes a water tank level gauge and a water temperature measuring point; along the tap water inlet to the cooling water inlet of the water tank, the cooling water input path includes a cooling water input path manual stop valve connected through a pipeline, a cooling water input path filter and a cooling water input path stabilizing section; Along the cooling water outlet of the water tank to the cooling path of the air intake nozzle, the cooling path of the main air intake path stable measurement section, the cooling path of the exhaust device, the inlet of the hot air switch and bypass device cooling path, the cooling water main supply path includes the cooling water main supply path stable measurement section connected by pipelines, the cooling water main supply path filter, the cooling water main supply path water pump and the cooling water main supply path pressure measurement point; The air intake nozzle cooling circuit includes an air intake nozzle cooling water supply circuit and an air intake nozzle cooling circuit return circuit. Along the flow direction of the cooling water, the two ends of the air intake nozzle cooling water supply circuit are respectively connected with the outlet of the cooling water main supply circuit and the inlet of the cooling pipe of the air intake nozzle. Along the flow direction of the cooling water, the air intake nozzle cooling circuit flow meter and the air intake nozzle cooling circuit stabilization section are sequentially arranged on the air intake nozzle cooling water supply circuit. The two ends of the air intake nozzle cooling circuit return circuit are respectively connected with the outlet of the cooling pipe of the air intake nozzle and the return water port of the water tank. The air intake nozzle cooling circuit return circuit is provided with an air intake nozzle cooling circuit temperature measuring point. The cooling circuit of the stable measurement section of the main air intake path includes a cooling water supply circuit of the stable measurement section of the main air intake path and a cooling water return circuit of the stable measurement section of the main air intake path. Along the flow direction of the cooling water, two ends of the cooling water supply circuit of the stable measurement section of the main air intake path are respectively connected with the outlet of the cooling water total supply circuit and the inlet of the cooling pipeline of the stable measurement section of the main air intake path. Along the flow direction of the cooling water, the cooling water supply circuit of the stable measurement section of the main air intake path is sequentially provided with a cooling circuit flow meter of the stable measurement section of the main air intake path and a stable section of the cooling circuit of the stable measurement section of the main air intake path; two ends of the cooling circuit return circuit of the stable measurement section of the main air intake path are respectively connected with the outlet of the cooling pipeline of the stable measurement section of the main air intake path and the return water port of the water tank, and the cooling circuit return circuit of the stable measurement section of the main air intake path is provided with a temperature measuring point of the cooling circuit of the stable measurement section of the main air intake path; Along the flow direction of cooling water, the two ends of the hot air switching and bypass device cooling path are respectively connected to the outlet of the cooling water main supply path and the inlet of the cooling water pipeline of the cooling device in the hot air switching and bypass device cooling path, and the hot air switching and bypass device cooling path is provided with a hot air switching and bypass device stabilizing section.

6. The test bench according to claim 4, characterized in that: The particle loading system comprises a hopper, particles, a glass conduit, a dust flowmeter, a pressure reducing valve, a deflation solenoid valve, a discharge valve and an air source for the particle loading device; the air source for the particle loading device is connected to the pressure reducing valve, and the outlet of the pressure reducing valve is connected to the hopper and the deflation solenoid valve respectively through pipelines; the hopper comprises a hopper body, a hopper upper cover is arranged on the hopper body, a particle pressing plate is arranged in the hopper body, a gap is arranged between the particle pressing plate and the inner wall of the hopper body or a small hole is opened on the particle pressing plate, and the particles are placed in the hopper body and located between the outlet of the hopper body and the particle pressing plate; the outlet of the hopper body is connected to the glass conduit, and a dust flowmeter and a discharge valve are arranged in sequence on the glass conduit along the flow direction of the particles; The particle loading system includes an intake pipe, an intake nozzle, an exhaust nozzle, a combustion device, and a test bench; a glass catheter is inserted into the intake pipe, and the intake pipe, the intake nozzle, the combustion device, and the exhaust nozzle are connected in sequence, and the combustion device is placed on the test bench; the intake pipe is connected to the outlet of the main intake path, and the exhaust nozzle is connected to the exhaust device; The combustion device is a rectangular structure made of transparent tempered glass. The internal aerodynamic contours of the intake nozzle and the exhaust nozzle are Laval nozzle structures. Quartz glass windows are provided on the sides of the intake nozzle and the exhaust nozzle. The position where the glass tube is inserted into the intake pipe is located above the center line of the intake pipe.

7. The test bench according to claim 4, characterized in that Along the gas flow direction from the outlet of the main air inlet path to the exhaust device mixing section in the exhaust device, the hot air switching and bypass device is connected, including a hot air switching and bypass device cooling device and a hot air switching and bypass device solenoid valve arranged in sequence.

8. The test bench according to any one of claims 4 to 7, characterized in that: The process gas system includes an air inlet path, a plurality of process gas supply paths arranged in parallel, and each process gas supply path includes a plurality of process gas output paths; The two ends of the air inlet are respectively connected with the compressed air source and the inlet of several process gas supply paths arranged in parallel, and a solenoid valve is arranged on the air inlet; the two ends of each process gas supply path are respectively connected with the outlet of the air inlet and several process gas output paths, and along the flow direction of the process gas, each process gas supply path includes a manual stop valve of the process gas supply path, an air filter, a first pressure reducing valve, a first pressure gauge, a second pressure reducing valve, a second pressure gauge and a buffer tank which are sequentially connected through pipelines; Both ends of each process gas output path are respectively connected with an outlet of a process gas supply path and an operating gas source; along the flow direction of the process gas, each process gas output path includes a process gas output path manual shut-off valve, a shut-off valve, a pressure measuring point and an operating gas source which are sequentially connected through pipelines; The operating gas source is at least one of a main air intake pressure regulating valve, a main air intake first pneumatic ball valve, process gas, a liquid fuel supply system regulating valve, an oxygen supplement system regulating valve or a gas fuel supply system regulating valve.

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