CN114458478B - Double-station test bed and test method for extrusion pump type rocket engine - Google Patents
Double-station test bed and test method for extrusion pump type rocket engine Download PDFInfo
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- CN114458478B CN114458478B CN202011562933.1A CN202011562933A CN114458478B CN 114458478 B CN114458478 B CN 114458478B CN 202011562933 A CN202011562933 A CN 202011562933A CN 114458478 B CN114458478 B CN 114458478B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/95—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
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Abstract
The invention relates to a double-station test bed of an extrusion pump type rocket engine and a test method thereof. According to the invention, the extrusion type and pump type test subsystems are operated in parallel in the same space, the utilization rate of test resources is improved, the test organization efficiency is improved, the test preparation process is carried out in parallel, and the risk of the test process is reduced. The high-pressure nitrogen for the test is directly prepared in a liquid nitrogen volatilization mode, and the test gas is uniformly prepared and stored, so that the reduction of gas purity and the introduction of redundant substances caused by secondary pollution and repeated pressure release of pipelines are reduced, the purity of the test nitrogen is improved, and the reliability of the test is ensured. The high-pressure high-purity nitrogen is multiplexed to prepare the storage subsystem, the centralized gas supply and distribution subsystem and the fire-fighting subsystem, so that resources are saved.
Description
Technical Field
The invention relates to the field of ground thermal ignition tests of liquid rocket engines, in particular to a double-station test bed and a test method of an extrusion pump type rocket engine.
Background
In order to meet the development requirements of the liquid rocket engine, the ground test of the liquid rocket engine is divided into an assembly extrusion test and a complete machine test, and the two tests are generally and independently constructed according to test contents and requirements.
From the aspect of test bed composition, the two sets of test systems are composed of subsystems such as high-pressure pure air source supply, pipeline pressurization, thrust bearing constraint devices, nitrogen fire protection, monitoring facilities, measurement and control and the like. From dividing on the test organization, after two sets of test systems are independently built, resources cannot be uniformly allocated, dominant equipment cannot be used mutually, processes cannot be parallel, and accordingly the test mechanism is complicated, personnel efficiency is low, and safety coefficient is reduced.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the double-station test bed and the test method for the extrusion pump type rocket engine, which realize the parallel operation of the extrusion type and pump type test systems in the same space through the top layer design, multiplexing the test subsystems and modularized composition structures, improve the utilization rate of test resources, improve the test organization efficiency, parallel test preparation process and reduce the risk of the test process.
In order to achieve the aim, the invention provides a double-station test bed of an extrusion pump type rocket engine, which comprises a high-purity nitrogen acquisition and storage subsystem, a centralized gas supply and distribution subsystem, an extrusion test subsystem, a pump pressure test subsystem and a fire control subsystem;
the high-pressure high-purity nitrogen preparation and storage subsystem stores and supplies high-pressure nitrogen;
after the centralized gas supply and distribution subsystem reduces the high-pressure nitrogen to a set pressure, nitrogen is provided for the extrusion test subsystem, the pumping pressure test subsystem and the fire control subsystem;
the extrusion test subsystem utilizes nitrogen to pressurize the fuel storage tank and the oxidant storage tank so as to discharge the fuel and the oxidant to the combustion chamber for combustion;
the pumping pressure test subsystem utilizes nitrogen to pressurize the liquid oxygen storage tank and the kerosene storage tank to perform an engine ignition test;
the fire-fighting subsystem extinguishes a fire by spraying nitrogen.
Further, the engine test piece is fixed to the thrust frame through the transfer frame, is fixed to the thrust foundation through the thrust frame, and constrains thrust generated by the engine during operation; different adapter racks are used for the compression test and the pumping test.
Further, a propellant supply subsystem is used to meter oxidant and fuel to the engine assembly.
Further, the system also comprises a real-time monitoring subsystem which is used for collecting video images of the extrusion test and the pumping pressure test and monitoring.
Further, the high-pressure high-purity nitrogen preparation and storage subsystem comprises a low-temperature liquid nitrogen storage tank, a nitrogen evaporation device and a high-pressure nitrogen storage tank; the low-temperature liquid nitrogen storage tank is used for storing liquid nitrogen; the liquid nitrogen can be gasified by the nitrogen evaporation device and then is conveyed to the high-pressure nitrogen, and the high-pressure nitrogen storage tank is used for storing and supplying the high-pressure nitrogen. Further, the nitrogen evaporation device comprises a liquid nitrogen pump and a vaporizer; the liquid nitrogen pump drives liquid nitrogen to boost to a set pressure in the closed cavity, the set pressure is sent to the vaporizer for high-pressure vaporization, and vaporized nitrogen is sent to the high-pressure nitrogen storage tank forwards.
Further, the centralized gas supply and distribution subsystem directly supplies the pressure of high-pressure nitrogen to a gas distribution plate main gas collecting pipe from 30MPa, the pressurized nitrogen supply of an extrusion test bed and the pressurized nitrogen supply of a pump pressure test bed are realized through the remote control of a PLC, and the pressure is regulated and reduced to 4.5MPa through a high-pressure reducer to be supplied to the fire-fighting subsystem.
Further, the extrusion test subsystem comprises an extrusion test oxidant pressurized nitrogen delivery pipeline, an extrusion test oxidant high-pressure container, an extrusion test oxidant supply branch, an extrusion test fuel pressurized delivery pipeline, an extrusion test fuel high-pressure container, an extrusion test fuel supply branch, an ignition system and an extrusion test acquisition module;
the oxidant is supplied to the front of the engine through an extrusion test oxidant supply branch; fuel is supplied to the front of the engine through the extrusion test fuel supply branch; nitrogen is injected into the extrusion test oxidant high-pressure container for pressurization through the extrusion test oxidant pressurization nitrogen conveying pipeline, nitrogen is injected into the extrusion test fuel high-pressure container for pressurization through the extrusion test fuel pressurization conveying pipeline, an ignition system is opened, an ignition source for ignition is formed in an engine combustion chamber, an oxidant is opened through a valve in front of an extrusion test oxidant supply branch and an extrusion test fuel supply branch pump, so that the oxidant and fuel enter the combustion chamber for continuous combustion, the engine starts to work, and an extrusion test acquisition module acquires engine data.
Further, the pumping pressure test subsystem comprises a pumping pressure test oxidant pressurizing and conveying pipeline, a pumping pressure test oxidant low-pressure container, a pumping pressure test oxidant supply branch, a pumping pressure test fuel pressurizing and conveying pipeline, a pumping pressure test fuel low-pressure container, a pumping pressure test fuel supply pipeline, a pumping pressure test auxiliary gas circuit supply system, a pumping pressure test kerosene vacuumizing system and a pumping pressure test acquisition module;
the oxidant is supplied to the front of the engine through a pump pressure test oxidant supply branch; fuel is supplied to the front of the engine through a pump pressure test fuel supply branch;
the auxiliary gas circuit supply system for the pumping pressure test supplies the pressure of the high-pressure gas cylinder for the engine test to the engine system, the kerosene vacuumizing system for the pumping pressure test is started to vacuumize the coal oil cavity of the engine, the front valve of the fuel supply pipeline pump is opened, and kerosene is filled into the engine under the vacuum condition;
nitrogen is injected into the pumping pressure test oxidant low-pressure container through the pumping pressure test oxidant pressurizing and conveying pipeline for pressurizing, and nitrogen is injected into the pumping pressure test fuel low-pressure container through the pumping pressure test fuel pressurizing and conveying pipeline for pressurizing; the engine starts to work, and the extrusion test acquisition module acquires engine data.
The invention also provides a method for testing the double-station test bed of the extrusion pump type rocket engine, which comprises the following steps: extrusion tests and pump pressure tests were performed.
Further, the extrusion test includes: the oxidant is supplied to the front of the engine through an extrusion test oxidant supply branch; fuel is supplied to the front of the engine through the extrusion test fuel supply branch; nitrogen is injected into the extrusion test oxidant high-pressure container for pressurization through the extrusion test oxidant pressurization nitrogen conveying pipeline, nitrogen is injected into the extrusion test fuel high-pressure container for pressurization through the extrusion test fuel pressurization conveying pipeline, an ignition system is opened, an ignition source for ignition is formed in an engine combustion chamber, an oxidant is opened through a valve in front of a pump of an extrusion test oxidant supply branch and an extrusion test fuel supply branch, so that the oxidant and fuel enter the combustion chamber for continuous combustion, the engine starts to work, and an extrusion test acquisition module acquires engine data; closing the engine when the engine works for a designated time, closing the extrusion test oxidant supply branch and the extrusion test fuel supply branch, discharging the residual propellant in the engine cavity, releasing the pressure of the extrusion test oxidant high-pressure container and the extrusion test fuel high-pressure container, recovering the oxidant and the fuel, sealing the extrusion test subsystem at normal pressure, dismantling the engine, and ending the test;
the pumping pressure test includes: the oxidant is supplied to the front of the engine through a pump pressure test oxidant supply branch; fuel is supplied to the front of the engine through a pump pressure test fuel supply branch; the auxiliary gas circuit supply system for the pumping pressure test supplies the pressure of the high-pressure gas cylinder for the engine test to the engine system, the kerosene vacuumizing system for the pumping pressure test is started to vacuumize the coal oil cavity of the engine, the front valve of the fuel supply pipeline pump is opened, and kerosene is filled into the engine under the vacuum condition; nitrogen is injected into the pumping pressure test oxidant low-pressure container through the pumping pressure test oxidant pressurizing and conveying pipeline for pressurizing, and nitrogen is injected into the pumping pressure test fuel low-pressure container through the pumping pressure test fuel pressurizing and conveying pipeline for pressurizing; the engine starts to work, and the extrusion test acquisition module acquires engine data; and when the engine works for a designated time, closing an oxidant supply branch of the propellant supply system and a pump pressure test fuel supply pipeline, discharging residual propellant in an engine cavity, recovering the oxidant and the fuel, sealing the pump pressure test subsystem at normal pressure, dismantling the engine, and ending the test.
The technical scheme of the invention has the following beneficial technical effects:
(1) According to the invention, the extrusion type and pump type test subsystems are operated in parallel in the same space, the utilization rate of test resources is improved, the test organization efficiency is improved, the test preparation process is carried out in parallel, and the risk of the test process is reduced.
(2) The extrusion type and pumping type test subsystem provided by the invention multiplexes the high-pressure high-purity nitrogen to prepare the storage subsystem, the centralized gas supply and distribution subsystem and the fire control subsystem, so that resources are saved.
(3) According to the invention, the high-pressure nitrogen for the test is directly prepared in a liquid nitrogen volatilization mode, and the test gas is uniformly prepared and stored, so that the reduction of gas purity and the introduction of redundant substances caused by secondary pollution and repeated pressure release of pipelines are reduced, the purity of the test nitrogen is improved, and the reliability of the test is ensured.
Drawings
FIG. 1 is a schematic diagram of a double-station test bed;
FIG. 2 is a schematic diagram of a monitoring and measurement and control subsystem;
FIG. 3 is a schematic diagram of the high purity nitrogen acquisition and storage device composition;
FIG. 4 is a schematic diagram of a centralized gas supply subsystem;
FIG. 5 is a schematic diagram of the squeeze and pump test subsystem composition.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The extrusion type rocket engine test bed is used for the verification test of the high-pressure component of the engine, the working pressure is 10MPa, the pump type test bed is suitable for the complete machine test of the rocket engine, and the working pressure is 0.6MPa. The pressurizing supply system used in the test system is selectively supplied in an online adjustable closed-loop flow regulation mode through planning the composition characteristics of the test system, the nondestructive fire-fighting system required by the test is arranged and placed, the thrust magnitude of the test is comprehensively tested, the switching frame is arranged to switch engines with different thrust magnitudes, the engines with multiple working forms of one thrust frame are realized, the inertia coefficient is optimized, the propellant supply system is three-dimensional through space orientation layout, the integration of two stations of extrusion and pumping pressure is realized in one physical space, the common resources of the test are multiplexed, the basic device is utilized, and the space utilization rate of the test system is improved.
The double-station integrated test bed is composed of a high-pressure high-purity nitrogen preparation storage subsystem 1, a centralized gas supply and distribution subsystem 2, an extrusion test subsystem 3, a pumping pressure test subsystem 4, a fire control subsystem 5, a measurement and control subsystem 6, a real-time monitoring subsystem, a selective pressurizing and conveying system (pressurizing gas is supplied to the extrusion test bed or the pumping pressure test by valve control), a propellant supply system (a propellant supply system of the extrusion test bed and a propellant supply system of the pumping pressure test bed), and a thrust constraint installation system.
The high-pressure high-purity nitrogen preparation and storage subsystem 1, as shown in fig. 3, comprises a low-temperature liquid nitrogen storage tank, a nitrogen evaporation device and a high-pressure nitrogen storage tank. The low-temperature liquid nitrogen storage tank is used for storing liquid nitrogen for preparing high-purity nitrogen, and the liquid nitrogen is filled into the low-temperature liquid nitrogen storage tank through the precision filter 1 and the liquid nitrogen inlet valve 2 for storage. After filling, the liquid nitrogen inlet valve is closed to be isolated from the outside, so that secondary pollution possibly brought in the storage process is avoided. The low-temperature liquid nitrogen storage tank is provided with a safety valve for protecting the storage tank, the pressure gauge detects the pressure in the storage tank, a liquid nitrogen relief valve 3 is arranged for conveniently discharging liquid nitrogen, and a liquid nitrogen outlet valve 4 is arranged for controlling the liquid nitrogen to enter the nitrogen evaporation device through a liquid nitrogen delivery pipeline.
The nitrogen evaporation device comprises a liquid nitrogen pump 5 and a vaporizer 6; liquid nitrogen is conveyed to a liquid nitrogen pump 5 through a pipeline for liquid boosting, the liquid nitrogen pump 5 drives the liquid nitrogen to be boosted to the use pressure of 20MPa in the closed cavity, the liquid nitrogen is conveyed to a vaporizer 6 for high-pressure vaporization, and the vaporized nitrogen is conveyed to a high-pressure nitrogen storage tank forwards. The carburetor is used for pressurizing in a self-pressurizing mode, no external air is introduced, and secondary pollution is avoided. The pipeline of the nitrogen evaporation device for outputting nitrogen is provided with a one-way valve 8 and a nitrogen discharge valve 7. The check valve 8 prevents high-pressure nitrogen from returning to the evaporation device, and the nitrogen discharge valve 7 performs nitrogen discharge to avoid overpressure.
The high-pressure nitrogen storage tank receives high-pressure nitrogen from the pipeline and is used for storage before use and air source supply in use, the system is closed, the operating state pressure and the storage state pressure are positive, and external natural state air cannot enter the system. The number of the high-pressure nitrogen storage tanks is set as required, and can be 1, 2 or more, and each high-pressure nitrogen storage tank is respectively provided with a nitrogen inlet valve 9, a nitrogen outlet valve 10, a nitrogen relief valve 11, a safety valve and a pressure gauge.
The high-pressure high-purity nitrogen preparation and storage subsystem 1 is used for storing liquid nitrogen into a gas storage tank after boosting and evaporating the liquid nitrogen, and uniformly supplying the liquid nitrogen to two sets of test devices through a high-throughput flow supply pipeline.
The centralized gas supply and distribution subsystem 2 is composed of a filter, a pressure reducer, a control valve and a sensor as shown in fig. 4, high-pressure gas is conveyed to an inlet of the gas distribution system, pressure adjustment is carried out through the gas pressure reducer, the gas is conveyed to different gas demand parts through the control valve and a pipeline, large-range variable-pressure adjustable flow supply is realized through controlling the parallel quantity of the gas pressure reducer, and the requirements of high-flow high-pressure gas supply in an extrusion test and low-flow low-pressure accurate supply in a complete machine pump pressure test are realized. As shown in FIG. 4, six pressure nitrogen outputs are provided, 2-1 supplies process nitrogen for blowing to the combustion chamber and the engine at 4.5MPa,2-2 supplies nitrogen for fire control at 4.5MPa,2-3 supplies oxidant storage tank pressurization at 8MPa,2-4 fuel storage tank pressurization at 8MPa,2-5 test bed other pneumatic valves supply 5MPa, and 2-6 gas bed driving gas at 0.6MPa. High pressure nitrogen is sent to the front of each sub-path through a filter. Firstly, a manual valve in front of a 2-6 branch is opened, high-pressure air is sent to a pressure reducer through a filter, the pressure is regulated by the pressure reducer to be 0.6MPa, and then the air is sent out, and a pneumatic valve of an air distribution plate obtains driving air, so that the air distribution plate can act under the control of an electromagnetic valve. 2-5 and 2-1 operate in the same manner as above. The 2-3 paths of medium-high pressure nitrogen are sent to the pneumatic valve, the pneumatic valve is remotely controlled to be opened, the 2-6 paths of driving gas are used for adjusting the first-stage pressure reducing valve before the high pressure nitrogen is sent to the main pressure reducer, the second-stage pressure increasing valve is controlled to apply pressure to the main pressure reducer, so that the high-pressure pressurizing gas source with the pressure of the main pressure reducer adjusted to 8MPa is sent to the outlet pneumatic valve, and the high-pressure pressurizing gas is supplied to the test bed after the outlet pneumatic valve is opened. 2-4 paths and 2-3 paths work according to the principle.
The propellant supply subsystem is composed of an independent storage tank, a discrete filling pipeline, a discrete supply pipeline, a flowmeter, a temperature and pressure sensor, a valve and the like according to the characteristics of a supply medium. According to the test characteristics, storage tanks are placed side by side on the space layout, the pipeline systems are arranged at intervals synchronously, and the parts entering the test frame are provided with replaceable flexible connecting pieces for butt joint during specific test purposes, so that the purposes of synchronous preparation and discrete supply are realized.
The thrust constraint installation subsystem consists of a bearing foundation, a thrust frame and a transfer frame, wherein the thrust frame is configured according to the maximum test thrust, the installation positions of a butt joint part of a propellant supply system and a nitrogen fire-fighting device are reserved upwards, the transfer frame is connected downwards, an engine test piece is fixed on the thrust frame through the transfer frame, and the thrust generated during the operation of an engine is constrained, so that a stable continuous test is realized. Two tests with different properties can be changed through the transfer frame, and two tests with different properties are realized on one test bearing device.
The nitrogen fire-fighting subsystem consists of a pressure reducer, a control valve and a nitrogen distribution device, high-pressure nitrogen is throttled by the pressure reducer and then is sent to the nitrogen distribution device through the control valve, and when an abnormal condition occurs in a test, the nitrogen fire-fighting subsystem is automatically opened remotely to perform nitrogen fire-fighting and non-damaging protection of engine products.
The real-time monitoring subsystem consists of a high-definition camera position, an adjustable cradle head and an image display and storage system and is used for remotely monitoring an engine test process in real time, recording an engine hot fire working process, realizing man-machine isolation and being intrinsically safe.
The measurement and control subsystem consists of a sensor, a conditioner, a switching cabinet, digital acquisition and recording equipment, communication equipment, an upper computer and the like, and realizes the equipment state dynamic display and parameter full-flow recording of the whole engine test process. The measurement and control system is provided with a bus type butt joint switching system through the transfer cabinet, the upper computer is configured with the switching of the measurement and control acquisition states of the test system through the database, and the measurement and control of two sets of test devices are realized on one set of hardware system.
The selective pressurization delivery is shared by both the compression test system 3 and the pumping test system 4.
The extrusion test system 3 and the pump pressure test system 4 operate in a similar manner, but with different working media and operating pressures. Comprises an extrusion test oxidant pressurized nitrogen delivery pipeline 3-1, an extrusion test oxidant high-pressure container 3-2, an extrusion test oxidant supply branch 3-3, an extrusion test fuel pressurized delivery pipeline 3-4, an extrusion test fuel high-pressure container 3-5, an extrusion test fuel supply branch 3-6 and an ignition system 3-7. The squeeze test oxidizer container 3-2 and the squeeze test fuel container 3-5 are pressurized, respectively. The oxidant is supplied to the front of the engine through an extrusion test oxidant supply branch 3-3; fuel is supplied to the front of the engine through the extrusion test fuel supply branch; nitrogen is injected into the extrusion test oxidant high-pressure container through the extrusion test oxidant pressurizing nitrogen conveying pipeline 3-1 for pressurizing, nitrogen is injected into the extrusion test fuel high-pressure container 3-5 for pressurizing through the extrusion test fuel pressurizing conveying pipeline 3-4, an ignition system is opened, an ignition source for ignition is formed in an engine combustion chamber, an oxidant is opened through the extrusion test oxidant supply branch 3-3 and a valve in front of a pump of the extrusion test fuel supply branch, so that the oxidant and fuel enter the combustion chamber for continuous combustion, the engine starts to work, and an extrusion test acquisition module acquires engine data.
The pumping pressure test subsystem consists of a liquid oxygen LOX supply system, a kerosene RP-1 supply system and an air path auxiliary part, wherein the LOX supply system and the RP-1 supply system are similar in principle, and in FIG. 5, a pumping pressure test oxidant pressurization conveying pipeline 4-1, a pumping pressure test oxidant low-pressure container 4-2, a pumping pressure test oxidant supply branch 4-3, a pumping pressure test fuel pressurization conveying pipeline 4-4, a pumping pressure test fuel low-pressure container 4-5, a pumping pressure test fuel supply pipeline 4-6, a pumping pressure test auxiliary air path supply system 4-7 and a pumping pressure test kerosene vacuumizing system 4-8 are all adopted. The oxidant is supplied to the front of the engine through a pump pressure test oxidant supply branch 4-3; fuel is supplied to the front of the engine through a pump pressure test fuel supply branch; the pump pressure test auxiliary gas circuit supply system 4-7 supplies the pressure of a high-pressure gas cylinder for engine test to the engine system, the pump pressure test kerosene vacuumizing system 4-8 is started to vacuumize an engine coal oil cavity, a front pump valve of the fuel supply pipeline 4-6 is opened, and kerosene is filled into the engine under the vacuum condition; nitrogen is injected into the pumping pressure test oxidant low-pressure container 4-2 through the pumping pressure test oxidant pressurizing and conveying pipeline 4-1, pressurized, and nitrogen is injected into the pumping pressure test fuel low-pressure container 4-5 through the pumping pressure test fuel pressurizing and conveying pipeline 4-4; the engine starts to work, and the extrusion test acquisition module acquires engine data.
The method for testing the double-station test bed of the extrusion pump type rocket engine comprises the following steps:
the extrusion test includes: test oxidizing agent LN 2 O is filled into the high-pressure container 3-2 through a filling pipeline for storage, before the medium in the high-pressure container 3-2 is supplied to an engine through a propellant supply pipeline 3-3, the output pressure of a 2-3 path of a gas distribution plate pressurizing supply system is set, a gas distribution plate is opened to send out a pneumatic valve, and the output pressure is conveyed to the front of the high-pressure container 3-2 through a nitrogen conveying pipeline 3-1;
test Fuel C 2 H 4 Filling the high-pressure container 3-5 through a filling pipeline for storage, setting 2-4 paths of output pressure of a gas distribution plate pressurizing supply system before a medium in the high-pressure container 3-5 is supplied to an engine through a propellant supply pipeline 3-6, opening the gas distribution plate to send out a pneumatic valve, and conveying the output pressure to the front of the container 3-5 through the 3-4;
the measurement system starts to collect parameters, opens the pressurizing valve of the oxidant high-pressure container 3-2, starts to pressurize the high-pressure container 3-2, opens the pressurizing valve of the fuel high-pressure container 3-5 when the pressurizing valve is increased to the starting pressure required by the task book, starts to pressurize the high-pressure container 3-5 when the pressurizing valve is increased to the starting pressure required by the task book, starts an automatic program, the engine firstly opens the 3-7 ignition system under the control of the automatic program, forms an ignition source for ignition in the combustion chamber of the engine, and the front valves of the oxidant supply branch 3-3 and the fuel supply branch 3-6 pump are controlled by the program to LN 2 O and C 2 H 4 Before filling and spraying according to a specific sequence, spraying the atomized fuel into a combustion chamber, igniting the atomized fuel by an ignition source to form continuous combustion, starting an engine to work, collecting various parameters and video data in the process in real time, monitoring the working state of the engine, closing the propellant supply systems 3-3 and 3-6 when the engine works for a specified time, discharging residual propellant in a cavity of the engine, releasing the pressure of the high-pressure containers 3-2 and 3-5, recovering the residual propellant of the high-pressure oxidant container 3-2, the oxidant supply branch 3-3, the fuel high-pressure container 3-5 and the fuel supply branch 3-6, sealing the positive pressure of the high-pressure oxidant container 3-2 and the oxidant supply branch 3-3 system, removing the engine, and ending the test.
The pumping pressure test includes: liquid oxygen for test is filled into the low-pressure container 4-2 through a filling pipeline for storage, the liquid oxygen in the low-pressure container 4-2 is supplied to an engine through a propellant supply 4-3, the output pressure of a 2-3 path of a gas distribution plate pressurizing supply system is set, a gas distribution plate is opened to send out a pneumatic valve, and the output pressure is conveyed to the front of the container 4-2 through a filling pipeline 4-1;
RP-1 for test is filled into a low-pressure container 4-5 through a filling pipeline for storage, RP-1 in the low-pressure container 4-5 is supplied to an engine through a propellant supply 4-6, the output pressure of a gas distribution plate pressurizing supply system 2-4 is set, a gas distribution plate is opened to send out a pneumatic valve, and the output pressure is conveyed to the front of the low-pressure container 4-5 through a fuel pressurizing conveying pipeline 4-4;
the pump pressure test auxiliary gas circuit supply system 4-7 supplies the pressure of a high-pressure gas cylinder for engine test to the engine system through a pipeline, the pump pressure test kerosene vacuumizing system 4-8 is started, a coal oil cavity of the engine is vacuumized, after the engine is vacuumized to a task book required value, a front valve of a fuel supply pipeline 4-6 is opened, and kerosene is filled into the engine under a vacuum condition;
the measuring system starts to collect parameters, opens a pressurizing valve of an oxidant pressurizing conveying pipeline 4-1, starts to pressurize a liquid oxygen low-pressure container 4-2, opens a pressurizing valve of the RP-1 fuel container 4-4 when the pressure is increased to the starting pressure required by a task book, starts to pressurize the RP-1 fuel low-pressure container 4-5, starts an automatic program when the pressure is increased to the starting pressure required by the task book, starts an engine to ignite under the control of the automatic program, collects various parameters and video data in the process in real time, monitors the working state of the engine, closes the engine when the engine works to a designated time, closes an oxidant supply branch 4-3 and a fuel supply pipeline 4-6 of the propellant supply system, discharges residual propellant in an engine cavity, decompresses the liquid oxygen low-pressure container 4-2 and the fuel low-pressure container 4-5, recovers residual propellant of the liquid oxygen low-pressure container 4-3, the oxidant supply branch 4-5 and the fuel low-pressure container 4-6, and the system stores the residual propellant in a normal pressure, removes the engine, and the test is finished.
In summary, the invention relates to a double-station test bed of an extrusion pump type rocket engine and a test method thereof, wherein the high-pressure high-purity nitrogen preparation and storage subsystem stores and supplies high-pressure nitrogen, and the centralized supply and distribution subsystem supplies nitrogen to the extrusion test subsystem, the pump pressure test subsystem and the fire control subsystem after reducing the high-pressure nitrogen to a set pressure so as to perform the pump pressure test and the extrusion test. According to the invention, the extrusion type and pump type test subsystems are operated in parallel in the same space, the utilization rate of test resources is improved, the test organization efficiency is improved, the test preparation process is carried out in parallel, and the risk of the test process is reduced. The high-pressure nitrogen for the test is directly prepared in a liquid nitrogen volatilization mode, and the test gas is uniformly prepared and stored, so that the reduction of gas purity and the introduction of redundant substances caused by secondary pollution and repeated pressure release of pipelines are reduced, the purity of the test nitrogen is improved, and the reliability of the test is ensured. The high-pressure high-purity nitrogen is multiplexed to prepare the storage subsystem, the centralized gas supply and distribution subsystem and the fire-fighting subsystem, so that resources are saved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (5)
1. The double-station test bed of the extrusion pump type rocket engine is characterized by comprising a high-purity nitrogen acquisition and storage subsystem, a centralized gas supply and distribution subsystem, an extrusion test subsystem, a pump pressure test subsystem and a fire control subsystem;
the high-purity nitrogen acquisition and storage subsystem stores and supplies high-pressure nitrogen;
after the centralized gas supply and distribution subsystem reduces the high-pressure nitrogen to a set pressure, nitrogen is provided for the extrusion test subsystem, the pumping pressure test subsystem and the fire control subsystem;
the extrusion test subsystem utilizes nitrogen to pressurize the fuel storage tank and the oxidant storage tank so as to discharge the fuel and the oxidant to the combustion chamber for combustion;
the pumping pressure test subsystem utilizes nitrogen to pressurize the liquid oxygen storage tank and the kerosene storage tank to perform an engine ignition test;
the fire-fighting subsystem extinguishes a fire by spraying nitrogen;
the engine test piece is fixed to the thrust frame through the transfer frame, and is fixed to the thrust foundation through the thrust frame to restrain thrust generated by the engine during operation; different adapter brackets are adopted for extrusion test and pumping pressure test;
the propellant supply subsystem is used for quantitatively supplying oxidant and fuel to the engine assembly;
the system also comprises a real-time monitoring subsystem which is used for collecting video images of the extrusion test and the pumping pressure test and monitoring;
the high-pressure high-purity nitrogen preparation and storage subsystem comprises a low-temperature liquid nitrogen storage tank, a nitrogen evaporation device and a high-pressure nitrogen storage tank; the low-temperature liquid nitrogen storage tank is used for storing liquid nitrogen; the liquid nitrogen can be gasified by a nitrogen evaporation device and then is conveyed to the high-pressure nitrogen, the high-pressure nitrogen storage tank is used for storing and supplying high-pressure nitrogen, and the nitrogen evaporation device comprises a liquid nitrogen pump and a vaporizer; the liquid nitrogen pump drives liquid nitrogen to boost to a set pressure in the closed cavity, the liquid nitrogen is sent to the vaporizer to be vaporized at high pressure, and the vaporized nitrogen is sent to the high-pressure nitrogen storage tank forwards;
filling liquid nitrogen into a low-temperature liquid nitrogen storage tank through a precision filter and a liquid nitrogen inlet valve for storage, closing the liquid nitrogen inlet valve after filling is finished and isolating the liquid nitrogen inlet valve from the outside, avoiding secondary pollution possibly brought in the storage process, setting a safety valve for the low-temperature liquid nitrogen storage tank to protect the storage tank, detecting the pressure in the storage tank through a pressure gauge, setting a liquid nitrogen discharge valve for conveniently discharging the liquid nitrogen, and setting a liquid nitrogen outlet valve for controlling the liquid nitrogen to enter a nitrogen evaporation device through a liquid nitrogen delivery pipeline;
the nitrogen evaporation device comprises a liquid nitrogen pump and a vaporizer; the liquid nitrogen is conveyed to a liquid nitrogen pump through a pipeline to boost the liquid, the liquid nitrogen pump drives the liquid nitrogen to boost the use pressure of 20MPa in the closed cavity, the liquid nitrogen is conveyed to a vaporizer to carry out high-pressure vaporization, the vaporized nitrogen is conveyed to a high-pressure nitrogen storage tank forwards, the vaporizer is pressurized in a self-pressurization mode, no external gas is introduced, secondary pollution is avoided, a one-way valve and a nitrogen relief valve are arranged on a pipeline of nitrogen output by a nitrogen evaporation device, the one-way valve prevents high-pressure nitrogen from returning to the evaporation device, the nitrogen relief valve carries out nitrogen discharge, and overpressure is avoided;
the centralized gas supply and distribution subsystem directly supplies the pressure of high-pressure nitrogen to a gas distribution plate main gas collecting pipe from 30MPa, realizes the pressurized supply of nitrogen of an extrusion test bed and the pressurized supply of nitrogen of a pump pressure test bed through the remote control of a PLC, and regulates and reduces the pressure to 4.5MPa through a high-pressure reducer to supply the pressurized supply of nitrogen to the fire-fighting subsystem;
the centralized gas supply and distribution subsystem consists of a filter, a pressure reducer, a control valve and a sensor, high-pressure gas is conveyed to an inlet of the gas distribution subsystem, pressure distribution is carried out through the gas pressure reducer, the high-pressure gas is conveyed to different gas demand parts through the control valve and a pipeline, large-range variable pressure and adjustable flow supply is realized through controlling the parallel quantity of the gas pressure reducer, the requirements of large-flow high-pressure gas supply in extrusion test and small-flow low-pressure accurate supply in whole machine pumping pressure test are realized, six-pressure nitrogen output is provided, 2-1 process nitrogen for blowing is supplied to a combustion chamber and an engine, 2-2 paths of nitrogen fire control is supplied to 4.5MPa,2-3 paths of oxidizer storage tank pressurization is 8MPa,2-4 fuel storage tank pressurization is 8MPa, other pneumatic valves of a 2-5 test bed are supplied to 5MPa, and driving gas of a 2-6 gas distribution platform is 0.6MPa, before the high-pressure nitrogen is sent to each sub-path through the filter, firstly, a manual valve in front of a 2-6 branch is opened, the high-pressure air is sent to the pressure reducer through the filter, after the pressure is regulated by the pressure reducer to be 0.6MPa, the pneumatic valve of the air distribution plate obtains driving air, the driving air can act under the control of the electromagnetic valve, the working principles of 2-5 and 2-1 are the same, the high-pressure nitrogen in 2-3 paths is sent to the pneumatic valve, after the pneumatic valve is remotely controlled to be opened, the high-pressure nitrogen is sent to the main pressure reducer, the driving air in 2-6 paths regulates a primary pressure reducing valve, the secondary pressure reducing valve is controlled to apply pressure to the main pressure reducer, so that the high-pressure pressurizing air source regulated to be 8MPa by the main pressure reducer is sent to an outlet pneumatic valve, after the outlet pneumatic valve is opened, the high-pressure pressurizing air is supplied to a test bed, and the working principles of 2-4 paths are the same.
2. The extrusion pump compression rocket engine double-station test bed of claim 1, wherein the extrusion test subsystem comprises an extrusion test oxidant pressurization nitrogen delivery line, an extrusion test oxidant high pressure vessel, an extrusion test oxidant supply branch, an extrusion test fuel pressurization delivery line, an extrusion test fuel high pressure vessel, an extrusion test fuel supply branch, an ignition system, and an extrusion test acquisition module;
the oxidant is supplied to the front of the engine through an extrusion test oxidant supply branch; fuel is supplied to the front of the engine through the extrusion test fuel supply branch; nitrogen is injected into the extrusion test oxidant high-pressure container for pressurization through the extrusion test oxidant pressurization nitrogen conveying pipeline, nitrogen is injected into the extrusion test fuel high-pressure container for pressurization through the extrusion test fuel pressurization conveying pipeline, an ignition system is opened, an ignition source for ignition is formed in an engine combustion chamber, an oxidant is opened through a valve in front of an extrusion test oxidant supply branch and an extrusion test fuel supply branch pump, so that the oxidant and fuel enter the combustion chamber for continuous combustion, the engine starts to work, and an extrusion test acquisition module acquires engine data.
3. The extrusion pump rocket engine double-station test bed of claim 2, wherein the pumping test subsystem comprises a pumping test oxidant boost delivery line, a pumping test oxidant low pressure vessel, a pumping test oxidant supply branch, a pumping test fuel boost delivery line, a pumping test fuel low pressure vessel, a pumping test fuel supply line, a pumping test auxiliary gas circuit supply system, a pumping test kerosene evacuation system, and a pumping test collection module;
the oxidant is supplied to the front of the engine through a pump pressure test oxidant supply branch; fuel is supplied to the front of the engine through a pump pressure test fuel supply branch;
the auxiliary gas circuit supply system for the pumping pressure test supplies the pressure of the high-pressure gas cylinder for the engine test to the engine system, the kerosene vacuumizing system for the pumping pressure test is started to vacuumize the coal oil cavity of the engine, the front valve of the fuel supply pipeline pump is opened, and kerosene is filled into the engine under the vacuum condition;
nitrogen is injected into the pumping pressure test oxidant low-pressure container through the pumping pressure test oxidant pressurizing and conveying pipeline for pressurizing, and nitrogen is injected into the pumping pressure test fuel low-pressure container through the pumping pressure test fuel pressurizing and conveying pipeline for pressurizing; the engine starts to work, and the extrusion test acquisition module acquires engine data.
4. A method of testing with the extrusion pump rocket motor double station test bed of claim 3, comprising: extrusion tests and pump pressure tests were performed.
5. A method for performing an assay according to claim 4, wherein,
the extrusion test includes: the oxidant is supplied to the front of the engine through an extrusion test oxidant supply branch; fuel is supplied to the front of the engine through the extrusion test fuel supply branch; nitrogen is injected into the extrusion test oxidant high-pressure container for pressurization through the extrusion test oxidant pressurization nitrogen conveying pipeline, nitrogen is injected into the extrusion test fuel high-pressure container for pressurization through the extrusion test fuel pressurization conveying pipeline, an ignition system is opened, an ignition source for ignition is formed in an engine combustion chamber, an oxidant is opened through a valve in front of a pump of an extrusion test oxidant supply branch and an extrusion test fuel supply branch, so that the oxidant and fuel enter the combustion chamber for continuous combustion, the engine starts to work, and an extrusion test acquisition module acquires engine data; closing the engine when the engine works for a designated time, closing the extrusion test oxidant supply branch and the extrusion test fuel supply branch, discharging the residual propellant in the engine cavity, releasing the pressure of the extrusion test oxidant high-pressure container and the extrusion test fuel high-pressure container, recovering the oxidant and the fuel, sealing the extrusion test subsystem at normal pressure, dismantling the engine, and ending the test;
the pumping pressure test includes: the oxidant is supplied to the front of the engine through a pump pressure test oxidant supply branch; fuel is supplied to the front of the engine through a pump pressure test fuel supply branch; the auxiliary gas circuit supply system for the pumping pressure test supplies the pressure of the high-pressure gas cylinder for the engine test to the engine system, the kerosene vacuumizing system for the pumping pressure test is started to vacuumize the coal oil cavity of the engine, the front valve of the fuel supply pipeline pump is opened, and kerosene is filled into the engine under the vacuum condition; nitrogen is injected into the pumping pressure test oxidant low-pressure container through the pumping pressure test oxidant pressurizing and conveying pipeline for pressurizing, and nitrogen is injected into the pumping pressure test fuel low-pressure container through the pumping pressure test fuel pressurizing and conveying pipeline for pressurizing; the engine starts to work, and the extrusion test acquisition module acquires engine data; and when the engine works for a designated time, closing an oxidant supply branch of the propellant supply system and a pump pressure test fuel supply pipeline, discharging residual propellant in an engine cavity, recovering the oxidant and the fuel, sealing the pump pressure test subsystem at normal pressure, dismantling the engine, and ending the test.
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