Multifunctional test system of liquid oxygen methane engine test bed

Abstract

The invention provides a multifunctional test system for a liquid oxygen methane engine test bed. The multifunctional test system comprises a gas path system, a liquid path system, a test station and a control module. Wherein the gas path system and the liquid path system are connected through a pipeline for gas supply, the liquid path system is connected with the test run station and used for providing liquid fuel needed by testing for the test run station, and the control module is connected with and controls operation of the gas path system and the liquid path system. The liquid path system comprises a liquid oxygen storage module, a liquid methane storage module, a liquid oxygen supercooling module, a liquid methane supercooling module, a liquid oxygen conveying module and a liquid methane conveying module. The multifunctional test system is composed of a set of gas path system, two sets of liquid path systems and two test run stations. The two sets of liquid path systems comprise the high-low pressure liquid oxygen liquid path module and the high-low pressure liquid methane liquid path module, one set of gas path system is adopted for gas supply, medium conveying can be carried out according to requirements, resource sharing of test equipment is improved, the total cost of equipment construction and maintenance is reduced, and the engine test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket engine test benches, in particular to a multifunctional test system for a liquid oxygen-methane engine test bench. Background Art

[0002] In the commercial space sector, driven by growing demand, liquid oxygen / methane launch vehicle technology is developing rapidly. The key to ensuring successful launches of these vehicles lies in reliable liquid oxygen / methane launch vehicle engines. The stability and reliability of liquid oxygen / methane launch vehicle engines are particularly important, necessitating the use of rocket engine test benches for testing and verification, reducing engine failure rates and improving reliability.

[0003] Currently, traditional liquid oxygen / methane liquid rocket engine test benches in China's aerospace sector have relatively simple test system components, with the liquid oxygen / methane low-pressure system and the liquid oxygen / methane high-pressure system often existing independently. The implementation of these two test systems requires the construction of separate test benches, making this type of test bench test system extremely expensive to build. Due to safety distance requirements, a large area of ​​land is required, and some equipment and facilities must be duplicated, resulting in inefficient use of shared infrastructure, increasing construction investment and maintenance costs. With the rapid development of liquid oxygen / methane liquid rocket engines, the pace of engine iteration and update has accelerated, and engine development involves multiple stages and various types of tests. Traditional single-model engine test bench test systems are no longer able to meet and adapt to the development of multiple engine models.

[0004] Therefore, it is necessary to design a liquid oxygen / methane engine test bench system that combines a liquid oxygen / methane low-pressure system, a liquid oxygen / methane high-pressure system, and a liquid oxygen / methane high and low systems. The resulting multifunctional test system and operation method can meet the test requirements of liquid oxygen / methane engines in multiple stages, types, sizes and application scenarios. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a multifunctional test system for a liquid oxygen-methane engine test bench to solve the problems that the engine test bench in the existing technology cannot meet the test requirements of multiple types, multiple stages, different sizes and different application scenarios, as well as the high construction cost.

[0006] The present invention provides a multifunctional test system for a liquid oxygen-methane engine test bench, the multifunctional test system comprising: an air circuit system, a liquid circuit system, a test station and a control module, wherein the air circuit system and the liquid circuit system are connected to each other through a pipeline to supply gas, the liquid circuit system is connected to the test station to provide the test station with liquid fuel required for testing, and the control module is connected to control the operation of the air circuit system and the liquid circuit system; the air circuit system comprises: a first liquid nitrogen storage module, a second liquid nitrogen storage module, a gas production module and a gas distribution module, wherein the pipeline of the first liquid nitrogen storage module is connected to the gas production module for gas production, and the pipeline of the gas production module is connected to the gas distribution module for gas distribution for the liquid circuit system; the liquid circuit system comprises: a liquid oxygen storage module, a liquid methane storage module, a liquid oxygen subcooling module, a liquid methane subcooling module, a liquid oxygen delivery module and a liquid methane delivery module, wherein the first liquid nitrogen storage module is connected to the liquid oxygen subcooling module through a pipeline Provide subcoolant, the liquid oxygen storage module is connected to the liquid oxygen subcooling module through a pipeline to perform liquid oxygen subcooling, and the liquid oxygen storage module and the liquid oxygen subcooling module are both connected to the liquid oxygen delivery module through a pipeline to provide liquid oxygen for test run; the second liquid nitrogen storage module is connected to the liquid methane subcooling module through a pipeline to provide subcoolant, and the liquid methane storage module is connected to the liquid methane subcooling module through a pipeline to perform liquid methane subcooling, and the liquid methane storage module and the liquid methane subcooling module are both The liquid methane delivery module is connected through a pipeline to provide liquid methane for test running; the test running station includes: an engine vehicle test running station and an engine assembly test running station, wherein the engine vehicle test running station is connected with the liquid oxygen delivery module and the liquid methane delivery module for performing low-pressure test running; the engine assembly test running station is connected with the liquid oxygen delivery module and the liquid methane delivery module for performing high-pressure test running and high-low pressure test running.

[0007] Furthermore, the liquid circuit system also includes: a liquid oxygen recovery module and a liquid methane recovery module, wherein the liquid oxygen recovery module is connected to the liquid oxygen delivery module through a pipeline, and is used to recover the liquid oxygen and its vaporized gas in the pipeline; the liquid methane recovery module is connected to the liquid methane delivery module through a pipeline, and is used to recover the liquid methane and its vaporized gas in the pipeline; the liquid oxygen recovery module pressurizes and transports the liquid oxygen recovered inside it through a pipeline to the liquid oxygen storage module or the liquid oxygen storage tank of the liquid oxygen delivery module; the liquid methane recovery module pressurizes and transports the liquid methane recovered inside it through a pipeline to the liquid methane storage module or the liquid methane storage tank of the liquid methane delivery module.

[0008] Furthermore, the liquid oxygen delivery module includes a low-pressure liquid oxygen delivery module and a high-pressure liquid oxygen delivery module, wherein the low-pressure liquid oxygen delivery module includes a low-pressure liquid oxygen storage tank, a low-pressure liquid oxygen main line and a low-pressure liquid oxygen branch line, which is used to deliver low-pressure liquid oxygen for testing to the engine vehicle test station and the engine assembly test station; the liquid oxygen supercooled in the liquid oxygen supercooler of the liquid oxygen supercooling module is delivered to the low-pressure liquid oxygen storage tank through the liquid oxygen supercooler outlet line and the low-pressure liquid oxygen storage tank filling line; the upper part of the low-pressure liquid oxygen storage tank is delivered to the low-pressure liquid oxygen storage tank through the first boosting module The gas distribution module is connected to perform gas distribution and pressurization, and the pressure is released through the first discharge module; the high-pressure liquid oxygen delivery module includes a high-pressure liquid oxygen storage tank and a high-pressure liquid oxygen main line, which is used to deliver high-pressure liquid oxygen for testing to the engine assembly test station; the liquid oxygen supercooled in the liquid oxygen subcooler of the liquid oxygen subcooling module is transported to the high-pressure liquid oxygen storage tank through the liquid oxygen subcooler outlet line and the high-pressure liquid oxygen storage tank filling line; the upper part of the high-pressure liquid oxygen storage tank is connected to the gas distribution module through the second boosting module to perform gas distribution and pressurization, and the pressure is released through the second discharge module.

[0009] Furthermore, the low-pressure liquid oxygen main line, the low-pressure liquid oxygen branch line and the high-pressure liquid oxygen main line are all connected to the liquid oxygen recovery module through pipelines to recover liquid oxygen and vaporized gas.

[0010] In an embodiment of the present invention, the liquid methane delivery module includes a low-pressure liquid methane delivery module and a high-pressure liquid methane delivery module, wherein the low-pressure liquid methane delivery module includes a low-pressure liquid methane storage tank, a low-pressure liquid methane main line and a low-pressure liquid methane branch line, which is used to deliver low-pressure liquid methane for testing to the engine vehicle test station and the engine assembly test station; the liquid methane supercooled in the liquid methane supercooler of the liquid methane supercooling module is delivered to the low-pressure liquid methane storage tank through the liquid methane supercooler outlet line and the low-pressure liquid methane storage tank filling line; the upper part of the low-pressure liquid methane storage tank is connected to the low-pressure liquid methane storage tank through the fourth The boost module is connected to the gas distribution module for gas distribution and boosting, and the pressure is relieved through the fourth emission module; the high-pressure liquid methane delivery module includes a high-pressure liquid methane storage tank and a high-pressure liquid methane main line, which is used to deliver high-pressure liquid methane for test to the engine assembly test station; the liquid methane supercooled in the liquid methane subcooler of the liquid methane subcooling module is transported to the high-pressure liquid methane storage tank through the liquid methane subcooler outlet line and the high-pressure liquid methane storage tank filling line; the upper part of the high-pressure liquid methane storage tank is connected to the gas distribution module through the third boost module for gas distribution and boosting, and the pressure is relieved through the third emission module.

[0011] Furthermore, the low-pressure liquid methane main line, the low-pressure liquid methane branch line and the high-pressure liquid methane main line are all connected to the liquid methane recovery module through pipelines to recover liquid methane and gasified gas.

[0012] Furthermore, the engine vehicle test station is a complete engine for low-pressure test; the low-pressure liquid oxygen storage tank is connected to the liquid oxygen inlet of the complete engine through the low-pressure liquid oxygen main line, providing low-pressure liquid oxygen for test; the low-pressure liquid methane storage tank is connected to the liquid methane inlet of the complete engine through the low-pressure liquid methane main line, providing low-pressure liquid methane for test; the engine assembly test station includes a turbine pump and a gas generator; the low-pressure liquid oxygen storage tank is connected to the liquid methane inlet of the complete engine through the low-pressure liquid oxygen main line and the low-pressure liquid oxygen branch pipe The high-pressure liquid methane storage tank is connected to the liquid methane inlet of the gas generator through the high-pressure liquid oxygen main line to provide low-pressure liquid oxygen for test run; the high-pressure liquid oxygen storage tank is connected to the liquid oxygen inlet of the turbine pump through the high-pressure liquid oxygen main line to provide high-pressure liquid oxygen for test run; the low-pressure liquid methane storage tank is connected to the liquid methane inlet of the gas generator through the low-pressure liquid methane main line and the low-pressure liquid methane branch line to provide low-pressure liquid methane for test run; the high-pressure liquid methane storage tank is connected to the liquid methane inlet of the turbine pump through the high-pressure liquid methane main line to provide high-pressure liquid methane for test run.

[0013] In an embodiment of the present invention, the gas production module includes: a liquid nitrogen storage tank, a liquid nitrogen plunger pump, a liquid nitrogen vaporizer and a high-pressure nitrogen cylinder group, wherein the liquid nitrogen in the first liquid nitrogen storage module is filled into the liquid nitrogen storage tank through the second liquid nitrogen filling pipeline, and then pumped into the liquid nitrogen vaporizer through the liquid nitrogen plunger pump for gasification, and finally the gasified nitrogen is stored in the high-pressure nitrogen cylinder group; the high-pressure nitrogen cylinder group is transported to the nitrogen distribution module through the nitrogen delivery main line.

[0014] Furthermore, the nitrogen gas distribution module includes a first gas distribution plate, a second gas distribution plate, a third gas distribution plate and a fourth gas distribution plate connected in parallel on the nitrogen gas delivery main line, wherein the first gas distribution plate is connected to the first boosting module through a first boosting air supply pipeline for boosting air supply; the second gas distribution plate is connected to the second boosting module through a second boosting air supply pipeline for boosting air supply; the third gas distribution plate is connected to the third boosting module through a third boosting air supply pipeline for boosting air supply; and the fourth gas distribution plate is connected to the fourth boosting module through a fourth boosting air supply pipeline for boosting air supply.

[0015] In an embodiment of the present invention, the first liquid nitrogen storage module provides subcoolant to the liquid oxygen subcooler through a first liquid nitrogen filling pipeline, and the liquid oxygen storage module transports liquid oxygen to the liquid oxygen subcooler through a liquid oxygen subcooler liquid inlet pipeline for liquid oxygen subcooling; the second liquid nitrogen storage module provides subcoolant to the liquid methane subcooler through a third liquid nitrogen filling pipeline, and the liquid methane storage module transports liquid methane to the liquid methane subcooler through a liquid methane subcooler liquid inlet pipeline for liquid methane subcooling.

[0016] As can be seen from the above embodiments, the present invention provides a multifunctional liquid oxygen-methane engine test bench system with at least the following benefits: The liquid oxygen-methane engine test bench of this multifunctional test system comprises a gas system, two liquid systems, and two test stations. The two liquid systems include high- and low-pressure liquid oxygen modules and high- and low-pressure liquid methane modules. Both liquid systems utilize a common gas system for gas supply, enabling medium delivery to different test stations as needed. This allows the test bench to adapt to the gas distribution requirements of different engine models, while also improving resource sharing among test equipment, significantly reducing the overall cost of equipment construction and maintenance, and increasing engine testing efficiency.

[0017] It should be understood that the foregoing general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are a part of the specification of the present invention and illustrate exemplary embodiments of the present invention. Together with the description, the drawings serve to explain the principles of the present invention.

[0019] Figure 1 This is a system connection structure diagram of a multifunctional test system for a liquid oxygen-methane engine test bench provided by the present invention.

[0020] Figure 2 This is a partially enlarged view of the first liquid nitrogen storage module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0021] Figure 3 This is a partially enlarged view of the second liquid nitrogen storage module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0022] Figure 4 This is a partial enlarged view of the gas production module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0023] Figure 5 This is a partial enlarged view of the nitrogen gas distribution module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0024] Figure 6 This is a partial enlarged view of the liquid oxygen storage tank pressurization and discharge module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0025] Figure 7 This is a partial enlarged view of the liquid methane storage tank pressurization and discharge module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0026] Figure 8This is a partial enlarged view of the liquid oxygen delivery module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0027] Figure 9 This is a partial enlarged view of the liquid methane delivery module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0028] Figure 10 This is a partial enlarged view of the test station of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0029] Figure 11 This is a partially enlarged view of the liquid oxygen recovery module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0030] Figure 12 This is a partial enlarged view of the liquid methane recovery module of the multifunctional test system of the liquid oxygen-methane engine test bench provided by the present invention.

[0031] Description of reference numerals:

[0032] A-first liquid nitrogen storage module, B-second liquid nitrogen storage module, C-gas production module, D-nitrogen gas distribution module, E-first boosting module, F-fourth boosting module, G-second boosting module, H-third boosting module, J-first discharge module, K-fourth discharge module, L-second discharge module, M-engine vehicle test station, N-third discharge module, P-liquid oxygen storage module, R-liquid methane storage module, S-liquid oxygen recovery module, U-liquid methane recovery module, V-liquid methane subcooling module, W-liquid oxygen subcooling module, X-liquid methane delivery module, Y-liquid oxygen delivery module, Z-engine assembly test station;

[0033] A1 - first liquid nitrogen storage tank, A2 - first liquid nitrogen filling tank truck, A3 - first liquid nitrogen filling filter, A4 - first liquid nitrogen filling valve, A5 - first self-boosting device liquid inlet regulating valve, A6 - self-boosting device, A7 - first self-boosting device air outlet valve, A8 - first liquid nitrogen outlet valve, A9 - liquid oxygen subcooler inlet filter, A10 - liquid oxygen subcooler liquid nitrogen inlet valve, A11 - first liquid nitrogen storage tank exhaust manual valve, A12 - first safety discharge valve, A13 - first self-operated exhaust valve, A14 - first safety valve, A15 - gas storage tank liquid delivery valve, AL - first liquid nitrogen storage tank liquid level gauge, AP - first liquid nitrogen storage tank pressure sensor;

[0034] B1 - second liquid nitrogen storage tank, B2 - second liquid nitrogen filling tank truck, B3 - second liquid nitrogen filling filter, B4 - second liquid nitrogen filling valve, B5 - second self-boosting device liquid inlet regulating valve, B6 - second self-boosting device, B7 - second self-boosting device air outlet valve, B8 - second liquid nitrogen outlet valve, B9 - liquid methane subcooler inlet filter, B10 - liquid methane subcooler liquid nitrogen inlet valve, B11 - second liquid nitrogen storage tank exhaust manual valve, B12 - second safety discharge valve, B13 - second self-operated exhaust valve, B14 - second safety valve, BL - second liquid nitrogen storage tank level gauge, BP - second liquid nitrogen storage tank pressure sensor;

[0035] C1-liquid nitrogen storage tank, C2-liquid nitrogen plunger pump, C3-liquid nitrogen vaporizer, C4-high-pressure nitrogen cylinder group, C5-high-pressure nitrogen cylinder group air supply valve, C6-high-pressure nitrogen pipeline isolation valve;

[0036] D1-first gas distribution plate, D2-second gas distribution plate, D3-third gas distribution plate, D4-fourth gas distribution plate, D5-liquid oxygen collection tank gas supply valve, D6-liquid methane collection tank gas supply valve;

[0037] E1-first liquid oxygen main boost solenoid valve, E2-first liquid oxygen auxiliary boost solenoid valve, E3-first liquid oxygen main boost orifice plate, E4-first liquid oxygen auxiliary boost orifice plate, E5-liquid oxygen low-pressure boost filter, E6-liquid oxygen low-pressure boost manual valve, EP-liquid oxygen low-pressure tank pressure sensor;

[0038] F1-fourth liquid methane main boost solenoid valve, F2-fourth liquid methane auxiliary boost solenoid valve, F3-fourth liquid methane main boost orifice, F4-fourth liquid methane auxiliary boost orifice plate, F5-liquid methane low-pressure boost filter, F6-liquid methane low-pressure boost manual valve, FP-liquid methane low-pressure tank pressure sensor;

[0039] G1-second liquid oxygen main boost solenoid valve, G2-second liquid oxygen auxiliary boost solenoid valve, G3-second liquid oxygen main boost orifice plate, G4-second liquid oxygen auxiliary boost orifice plate, G5-liquid oxygen high-pressure boost filter, G6-liquid oxygen high-pressure boost manual valve, GP-liquid oxygen high-pressure tank pressure sensor;

[0040] H1-third liquid methane main boost solenoid valve, H2-third liquid methane auxiliary boost solenoid valve, H3-third liquid methane main boost orifice plate, H4-third liquid methane auxiliary boost orifice plate, H5-liquid methane high-pressure boost filter, H6-liquid methane high-pressure boost manual valve, HP-liquid methane high-pressure tank pressure sensor;

[0041] J1-first safety discharge manual valve, J2-first discharge safety valve, J3-first bypass discharge valve, J4-first anti-pressure manual valve, J5-first check valve, J6-first exhaust muffler;

[0042] K1-fourth safety discharge manual valve, K2-fourth discharge safety valve, K3-fourth bypass discharge valve, K4-fourth anti-pressure manual valve, K5-fourth check valve, K6-second methane discharge flame arrester, K7-fourth exhaust muffler;

[0043] L1-second safety discharge manual valve, L2-second discharge safety valve, L3-second bypass discharge valve, L4-second anti-pressure hand valve, L5-second check valve, L6-second exhaust muffler;

[0044] N1-third safety discharge manual valve, N2-third discharge safety valve, N3-third bypass discharge valve, N4-third anti-pressure manual valve, N5-third check valve, N6-first methane discharge flame arrester, N7-third exhaust muffler;

[0045] M1-complete engine;

[0046] O1- low-pressure liquid oxygen storage tank, O2- high-pressure liquid oxygen storage tank, O3- high-pressure liquid methane storage tank, O4- low-pressure liquid methane storage tank, OL1- low-pressure liquid oxygen storage tank level gauge, OL2- high-pressure liquid oxygen storage tank level gauge, OL3- high-pressure liquid methane storage tank level gauge, OL4- low-pressure liquid methane storage tank level gauge;

[0047] P1-Liquid oxygen storage tank, P2-Liquid oxygen filling tank truck, P3-Liquid oxygen filling filter, P4-Liquid oxygen filling valve, P5-Third self-boosting device liquid inlet regulating valve, P6-Third self-boosting device, P7-Third self-boosting device outlet valve, P8-Liquid oxygen outlet valve, P9-Liquid oxygen low-pressure tank inlet filter, P10-Liquid oxygen low-pressure tank inlet valve, P11-Liquid oxygen high-pressure tank inlet filter, P12-Liquid oxygen high-pressure tank inlet valve, P13-Liquid oxygen tank exhaust manual valve, P14-Third safety discharge valve, P15-Third self-operated exhaust valve, P16-Third safety valve, PL-Liquid oxygen tank level gauge, PP-Liquid oxygen tank pressure sensor;

[0048] R1-liquid methane storage tank, R2-liquid methane filling tank truck, R3-liquid methane filling filter, R4-liquid methane filling valve, R5-fourth self-supercharger liquid inlet regulating valve, R6-fourth self-supercharger, R7-fourth self-supercharger outlet valve, R8-liquid methane outlet valve, R9-liquid methane low-pressure tank inlet filter, R10-liquid methane low-pressure tank inlet valve, R11-liquid methane high-pressure tank inlet filter, R12-liquid methane high-pressure tank inlet valve, R13-liquid methane tank exhaust manual valve, R14-fourth safety discharge valve, R15-fourth self-operated exhaust valve, R16-fourth safety valve, RL-liquid methane tank level gauge, RP-liquid methane tank pressure sensor;

[0049] S1-liquid oxygen collecting tank, S2-liquid oxygen collecting tank discharge safety valve, S3-liquid oxygen collecting tank discharge bypass valve, S4-liquid oxygen collecting tank recovery valve, S5-liquid oxygen recovery line filter, SL-liquid oxygen collecting tank level gauge, SP-liquid oxygen collecting tank pressure sensor;

[0050] U1-liquid methane collection tank, U2-liquid methane collection tank discharge safety valve, U3-liquid methane collection tank discharge bypass valve, U4-liquid methane collection tank recovery valve, U5-liquid methane recovery line filter, UL-liquid methane collection tank level gauge, UP-liquid methane collection tank pressure sensor;

[0051] V1-liquid methane subcooler, V2-liquid methane subcooler inlet valve, V3-liquid methane subcooler outlet valve, VT-liquid methane subcooler outlet temperature sensor, VL-liquid methane subcooler liquid level sensor;

[0052] W1-liquid oxygen subcooler, W2-liquid oxygen subcooler inlet valve, W3-liquid oxygen subcooler outlet valve, WT-liquid oxygen subcooler outlet temperature sensor, WL-liquid oxygen subcooler liquid level sensor;

[0053] X1-Low-pressure liquid methane storage tank outlet valve, X2-liquid methane low-pressure turbine flowmeter, X3-whole engine liquid methane low-pressure cut-off valve, X4-whole engine liquid methane low-pressure bellows, X5-whole engine liquid methane pump inlet filter, X6-gas generator liquid methane low-pressure cut-off valve, X7-gas generator liquid methane low-pressure bellows, X8-gas generator liquid methane inlet filter, X9-gas generator liquid methane low-pressure drain valve, X10-liquid methane low-pressure exhaust valve, X11-high-pressure liquid methane storage tank outlet valve, X12-liquid methane high-pressure turbine flowmeter, X13-liquid methane high-pressure Line filter, X14-liquid methane high-pressure line cavitation tube, X15-turbine pump liquid methane inlet valve, X16-liquid methane high-pressure line drain valve, X17-liquid methane high-pressure line exhaust valve, X18-engine liquid methane low-pressure line drain valve, X19-liquid methane collection tank inlet valve, XP1-whole engine liquid methane low-pressure line pressure sensor, XP2-liquid methane high-pressure line pressure sensor, XP3-gas generator liquid methane low-pressure line pressure sensor, XT1-whole engine liquid methane low-pressure line temperature sensor, XT2-liquid methane high-pressure line temperature sensor, XT3-gas generator liquid methane low-pressure line temperature sensor;

[0054] Y1-Low-pressure liquid oxygen storage tank outlet valve, Y2-Liquid oxygen low-pressure line turbine flowmeter, Y3-Complete engine liquid oxygen low-pressure line cut-off valve, Y4-Complete engine liquid oxygen low-pressure line bellows, Y5-Complete engine liquid oxygen pump inlet filter, Y6-Gas generator liquid oxygen low-pressure line cut-off valve, Y7-Gas generator liquid oxygen low-pressure line bellows, Y8-Gas generator liquid oxygen inlet filter, Y9-Gas generator liquid oxygen low-pressure line drain valve, Y10-Liquid oxygen low-pressure line exhaust valve, Y11-High-pressure liquid oxygen storage tank outlet valve, Y12-Liquid oxygen high-pressure line turbine flowmeter, Y13-Liquid oxygen high-pressure line Filter, Y14-liquid oxygen high-pressure circuit cavitation tube, Y15-turbine pump liquid oxygen inlet valve, Y16-liquid oxygen high-pressure circuit drain valve, Y17-liquid oxygen high-pressure circuit exhaust valve, Y18-complete engine liquid oxygen low-pressure circuit drain valve, Y19-liquid oxygen collection tank inlet valve, YP1-complete engine liquid oxygen low-pressure circuit pressure sensor, YP2-liquid oxygen high-pressure circuit pressure sensor, YP3-gas generator liquid oxygen low-pressure circuit pressure sensor, YT1-complete engine liquid oxygen low-pressure circuit temperature sensor, YT2-liquid oxygen high-pressure circuit temperature sensor, YT3-gas generator liquid oxygen low-pressure circuit temperature sensor;

[0055] Z1-turbopump, Z2-gas generator;

[0056] HK1-first control device, HK2-second control device, HK3-third control device, HK4-fourth control device, HK5-fifth control device, HK6-sixth control device;

[0057] a1-first liquid nitrogen storage tank filling pipeline, a2-first liquid nitrogen storage tank self-pressurization pipeline, a3-first liquid nitrogen filling pipeline, a4-first liquid nitrogen storage tank discharge pipeline, a5-second liquid nitrogen filling pipeline;

[0058] b1-second liquid nitrogen storage tank filling pipeline, b2-second liquid nitrogen storage tank self-pressurization pipeline, b3-third liquid nitrogen filling pipeline, b4-second liquid nitrogen storage tank discharge pipeline;

[0059] c0-nitrogen gas delivery main pipeline, c1-first nitrogen gas branch pipeline, c2-second nitrogen gas branch pipeline, c3-third nitrogen gas branch pipeline, c4-fourth nitrogen gas branch pipeline;

[0060] d1-first boost air supply pipeline, d2-second boost air supply pipeline, d3-third boost air supply pipeline, d4-fourth boost air supply pipeline, d5-fifth boost air supply pipeline, d6-sixth boost air supply pipeline;

[0061] e1 - liquid oxygen low-pressure main booster pipeline, e2 - liquid oxygen low-pressure auxiliary booster pipeline; f1 - liquid methane low-pressure main booster pipeline, f2 - liquid methane low-pressure auxiliary booster pipeline; g1 - liquid oxygen high-pressure main booster pipeline, g2 - liquid oxygen high-pressure auxiliary booster pipeline; h1 - liquid methane high-pressure main booster pipeline, h2 - liquid methane high-pressure auxiliary booster pipeline;

[0062] j1-liquid oxygen low-pressure boost discharge pipeline, j2-liquid oxygen low-pressure bypass exhaust pipeline, j3-liquid oxygen low-pressure anti-pressure pipeline;

[0063] k1-liquid methane low-pressure boost discharge pipe, k2-liquid methane low-pressure bypass exhaust pipe, k3-liquid methane low-pressure anti-pressure pipe;

[0064] l1-liquid oxygen high-pressure boost discharge pipeline, l2-liquid oxygen high-pressure bypass exhaust pipeline, l3-liquid oxygen high-pressure anti-pressure pipeline;

[0065] n1-liquid methane high-pressure boost discharge pipeline, n2-liquid methane high-pressure bypass exhaust pipeline, n3-liquid methane high-pressure anti-pressure pipeline;

[0066] p1-liquid oxygen storage tank filling pipeline, p2-liquid oxygen storage tank self-pressurization pipeline, p3-low-pressure liquid oxygen storage tank filling pipeline, p4-high-pressure liquid oxygen storage tank filling pipeline, p5-liquid oxygen storage tank discharge pipeline;

[0067] r1-liquid methane storage tank filling pipeline, r2-liquid methane storage tank self-pressurization pipeline, r3-low-pressure liquid methane storage tank filling pipeline, r4-high-pressure liquid methane storage tank filling pipeline, r5-liquid methane storage tank discharge pipeline;

[0068] s1-liquid oxygen collection tank recovery pipeline, s2-liquid oxygen collection tank safety discharge pipeline, s3-liquid oxygen collection tank discharge bypass pipeline;

[0069] u1-liquid methane collection tank recovery pipeline, u2-liquid methane collection tank safety discharge pipeline, u3-liquid methane collection tank discharge bypass pipeline;

[0070] v1-liquid methane subcooler inlet pipeline, v2-liquid methane subcooler outlet pipeline; w1-liquid oxygen subcooler inlet pipeline, w2-liquid oxygen subcooler outlet pipeline;

[0071] x1 - low-pressure liquid methane main line, x2 - low-pressure liquid methane branch line, x3 - high-pressure liquid methane main line, x4 - gas generator liquid methane low-pressure drain line, x5 - liquid methane high-pressure drain line, x6 - liquid methane low-pressure exhaust line, x7 - liquid methane high-pressure exhaust line, x8 - complete engine liquid methane low-pressure drain line;

[0072] y1- low-pressure liquid oxygen main line, y2- low-pressure liquid oxygen branch line, y3- high-pressure liquid oxygen main line, y4- gas generator liquid oxygen low-pressure line drain line, y5- liquid oxygen high-pressure line drain line, y6- liquid oxygen low-pressure line exhaust line, y7- liquid oxygen high-pressure line exhaust line, y8- complete engine liquid oxygen low-pressure line drain line. DETAILED DESCRIPTION

[0073] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0074] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the present invention. The present description and examples are intended to be illustrative only.

[0075] The present invention provides a multifunctional test system for a liquid oxygen-methane engine test bench. Figures 1 to 12 The figure shows a schematic diagram of the multifunctional test system's structural connections. Specifically, the multifunctional test system includes an air system, a liquid system, a test station, and a control module. The air system and the liquid system are connected via pipelines for air supply. The liquid system is connected to the test station to provide the liquid fuel required for testing. The control module controls the operation of the air and liquid systems, providing fuel to the test station.

[0076] The gas circuit system includes: a first liquid nitrogen storage module A, a second liquid nitrogen storage module B, a gas production module C, and a gas distribution module D. Among them, the first liquid nitrogen storage module A is connected to the gas production module C through a pipeline for gas production, and the gas production module C is connected to the gas distribution module D through a pipeline for gas distribution for the liquid circuit system.

[0077] In this embodiment, the first liquid nitrogen storage module A is used to store and provide liquid nitrogen, and includes a first liquid nitrogen storage tank A1 for storing liquid nitrogen. The first liquid nitrogen storage tank A1 is connected to the first liquid nitrogen filling tank truck A2 via the first liquid nitrogen storage tank filling pipeline a1 for filling liquid nitrogen. The first liquid nitrogen storage tank A1 is connected to the first liquid nitrogen storage tank self-pressurization pipeline a2, which is connected to the bottom of the first liquid nitrogen storage tank A1 upstream and the top of the first liquid nitrogen storage tank A1 downstream. The first liquid nitrogen storage tank A1 is connected to the liquid oxygen supercooling module W via the first liquid nitrogen filling pipeline a3. A discharge pipeline a4 for communication with the first liquid nitrogen storage tank is provided downstream of the first liquid nitrogen storage tank self-pressurization pipeline a2. The first liquid nitrogen filling pipeline a3 is connected to the second liquid nitrogen filling pipeline a5.

[0078] The first liquid nitrogen storage tank filling pipeline a1 is provided with a first liquid nitrogen filling filter A3 for filtering liquid nitrogen and a first liquid nitrogen filling valve A4 for filling control.

[0079] The first self-boosting device liquid inlet regulating valve A5, the first self-boosting device A6 and the first self-boosting device air outlet valve A7 are sequentially provided on the self-boosting pipeline a2 of the first liquid nitrogen storage tank along the direction of the boosting flow.

[0080] The first liquid nitrogen filling pipeline a3 is provided with a first liquid nitrogen outlet valve A8 for liquid outlet control, a liquid oxygen subcooler inlet filter A9 for filtering liquid nitrogen, and a liquid oxygen subcooler liquid nitrogen inlet valve A10 for controlling the liquid nitrogen flow rate in sequence along the liquid outlet direction.

[0081] The first liquid nitrogen storage tank discharge pipelines a4 are parallel lines that merge and connect downstream. One of these lines is equipped with a first liquid nitrogen storage tank exhaust manual valve A11 for manual exhaust and a first self-operated exhaust valve A13, which automatically opens and discharges liquids based on a set pressure. The other line is equipped with a first safety discharge valve A12 for safe manual exhaust. Both lines are connected downstream with a first safety valve A14 for safe discharge of the liquid nitrogen storage tank.

[0082] The upstream end of the second liquid nitrogen filling pipeline a5 is provided with a gas storage tank liquid delivery valve A15 for controlling the supply of liquid nitrogen.

[0083] The first liquid nitrogen storage tank A1 is provided with a first liquid nitrogen storage tank level gauge AL for monitoring the storage tank liquid level. The first liquid nitrogen storage tank is provided with a first liquid nitrogen storage tank pressure sensor AP for monitoring the storage tank pressure at a position downstream of the boosting pipeline a2 near the first liquid nitrogen storage tank A1.

[0084] The second liquid nitrogen storage module B is used to store and provide liquid nitrogen, and includes a second liquid nitrogen storage tank B1 for storing liquid nitrogen. The second liquid nitrogen storage tank B1 is connected to the second liquid nitrogen filling tank truck B2 via the second liquid nitrogen storage tank filling pipeline b1 for filling with liquid nitrogen. The second liquid nitrogen storage tank B1 is connected to the second liquid nitrogen storage tank self-pressurization pipeline b2, which is connected to the bottom of the second liquid nitrogen storage tank B1 upstream and the top of the second liquid nitrogen storage tank B1 downstream. The second liquid nitrogen storage tank B1 is connected to the liquid methane supercooling module V via the second liquid nitrogen filling pipeline b3. The second liquid nitrogen storage tank self-pressurization pipeline b2 is provided downstream with a second liquid nitrogen storage tank discharge pipeline b4.

[0085] The second liquid nitrogen storage tank filling pipeline b1 is provided with a second liquid nitrogen filling filter B3 for filtering liquid nitrogen and a second liquid nitrogen filling valve B4 for filling control.

[0086] The second self-boosting device liquid inlet regulating valve B5, the second self-boosting device B6 and the second self-boosting device air outlet valve B7 are sequentially provided on the self-boosting pipeline b2 of the second liquid nitrogen storage tank along the direction of the boosting flow.

[0087] The third liquid nitrogen filling pipeline b3 is provided with a second liquid nitrogen outlet valve B8 for liquid outlet control, a liquid methane subcooler inlet filter B9 for filtering liquid nitrogen, and a liquid methane subcooler liquid nitrogen inlet valve B10 for controlling the liquid nitrogen flow rate in sequence along the liquid outlet direction.

[0088] The second liquid nitrogen storage tank discharge pipelines b4 are parallel lines that merge and connect downstream. One of these lines is equipped with a second manual exhaust valve B11 for manual exhaust of the liquid nitrogen storage tank and a second self-operated exhaust valve B13 that automatically opens and discharges according to a set pressure. The other line is equipped with a second safety discharge valve A12 for safe manual exhaust. Both lines are connected downstream with a second safety valve B14 for safe discharge of the liquid nitrogen storage tank.

[0089] The second liquid nitrogen storage tank B1 is provided with a second liquid nitrogen storage tank level gauge BL for monitoring the storage tank liquid level. A second liquid nitrogen storage tank pressure sensor BP for monitoring the storage tank pressure is provided downstream of the second liquid nitrogen storage tank boosting pipeline b2 and close to the second liquid nitrogen storage tank B1.

[0090] The liquid circuit system includes a liquid oxygen storage module P, a liquid methane storage module R, a liquid oxygen subcooling module W, a liquid methane subcooling module V, a liquid oxygen delivery module Y, and a liquid methane delivery module X. The first liquid nitrogen storage module A is connected to the liquid oxygen subcooling module W via a pipeline to provide subcoolant. The liquid oxygen storage module P is connected to the liquid oxygen subcooling module W via a pipeline to subcool the liquid oxygen. Both the liquid oxygen storage module P and the liquid oxygen subcooling module W are connected to the liquid oxygen delivery module Y via pipelines to provide liquid oxygen for test runs.

[0091] The second liquid nitrogen storage module B is connected to the liquid methane supercooling module V through a pipeline to provide supercoolant, and the liquid methane storage module R is connected to the liquid methane supercooling module V through a pipeline to supercool liquid methane. Both the liquid methane storage module R and the liquid methane supercooling module V are connected to the liquid methane delivery module X through a pipeline to provide liquid methane for trial operation.

[0092] In this embodiment, the liquid oxygen storage module P is used to store and provide liquid oxygen and includes a liquid oxygen storage tank P1 for storing liquid oxygen. The liquid oxygen storage tank P1 is connected to a liquid oxygen filling tank truck P2 via a liquid oxygen storage tank filling pipeline p1 for refilling. The liquid oxygen storage tank P1 is connected to a liquid oxygen storage tank self-pressurization pipeline p2, which is connected upstream to the bottom of the liquid oxygen storage tank P1 and downstream to the top of the liquid oxygen storage tank P1. The liquid oxygen storage tank P1 is connected to the liquid oxygen delivery module Y via a low-pressure liquid oxygen storage tank filling pipeline p3 and a high-pressure liquid oxygen storage tank filling pipeline p4, respectively, for providing liquid oxygen. A liquid oxygen storage tank discharge pipeline p5 is provided downstream of the liquid oxygen storage tank self-pressurization pipeline p2.

[0093] The liquid oxygen tank filling pipeline p1 is provided with a liquid oxygen filling filter P3 for filtering liquid oxygen and a liquid oxygen filling valve P4 for filling control.

[0094] The liquid oxygen storage tank self-boosting pipeline p2 is provided with a third self-boosting device liquid inlet regulating valve P5, a third self-boosting device P6 and a third self-boosting device gas outlet valve P7 in sequence along the direction of the boosting flow.

[0095] The low-pressure liquid oxygen storage tank filling pipeline p3 is sequentially provided with a liquid oxygen outlet valve P8 for liquid outlet control, a liquid oxygen low-pressure storage tank inlet filter P9 for filtering liquid oxygen, and a liquid oxygen low-pressure storage tank inlet valve P10 for controlling the liquid oxygen flow rate.

[0096] The upstream end of the high-pressure liquid oxygen tank refill line P4 is connected to the low-pressure liquid oxygen tank refill line P3, located downstream of the liquid oxygen outlet valve P8. Along the high-pressure liquid oxygen tank refill line P4, along the outlet direction, are a liquid oxygen high-pressure tank inlet filter P11 for filtering the liquid oxygen and a liquid oxygen high-pressure tank inlet valve P12 for controlling the liquid oxygen flow rate.

[0097] The liquid oxygen tank discharge lines P5 are parallel and merge downstream. One line is equipped with a manual exhaust valve P13 for the liquid oxygen tank, and a third self-operated exhaust valve P15, which automatically opens and discharges according to a set pressure. The other line is equipped with a third safety relief valve P14 for safe manual exhaust. Both lines are connected downstream with a third safety valve P16 for safe discharge of the liquid oxygen tank.

[0098] The liquid oxygen tank P1 is provided with a liquid oxygen tank level gauge PL for monitoring the tank liquid level. A liquid oxygen tank pressure sensor PP for monitoring the tank pressure is provided downstream of the liquid oxygen tank booster line p2 near the liquid oxygen tank P1.

[0099] The liquid methane storage module R is used to store and supply liquid methane. It includes a liquid methane storage tank R1. Liquid methane storage tank R1 is connected to a liquid methane tank truck R2 via a liquid methane tank filling line r1 for refueling. A liquid methane tank self-pressurization line r2 is connected to liquid methane storage tank R1. This line is connected upstream to the bottom of liquid methane storage tank R1 and downstream to the top of liquid methane storage tank R1. Liquid methane storage tank R1 is connected to the liquid methane delivery module X via a low-pressure liquid methane tank filling line r3 and a high-pressure liquid methane tank filling line r4, respectively, for supplying liquid methane. Downstream of this line r2 is a liquid methane tank discharge line r5.

[0100] The liquid methane tank filling pipeline r1 is provided with a liquid methane filling filter R3 for filtering liquid methane and a liquid methane filling valve R4 for filling control.

[0101] The fourth self-boosting device liquid inlet regulating valve R5, the fourth self-boosting device R6 and the fourth self-boosting device gas outlet valve R7 are sequentially provided on the self-boosting pipeline r2 of the liquid methane storage tank along the direction of the boosting flow.

[0102] The low-pressure liquid methane storage tank filling pipeline r3 is sequentially provided with a liquid methane outlet valve R8 for liquid outlet control, a liquid methane low-pressure storage tank inlet filter R9 for filtering liquid methane, and a liquid methane low-pressure storage tank inlet valve R10 for controlling the liquid methane flow rate.

[0103] The upstream end of the high-pressure liquid methane tank filling line r4 is connected to the low-pressure liquid methane tank filling line r3, located downstream of the liquid methane outlet valve R8. Along the high-pressure liquid methane tank filling line r4, along the outlet direction, are a liquid methane high-pressure tank inlet filter R11 for filtering the liquid methane and a liquid methane high-pressure tank inlet valve R12 for controlling the liquid methane flow.

[0104] The liquid methane tank discharge pipelines r5 are parallel lines that merge and connect downstream. One of these lines is equipped with a manual exhaust valve R13 for the liquid methane tank, and a fourth self-operated exhaust valve R15, which automatically opens and releases gas based on a set pressure. The other line is equipped with a fourth safety discharge valve R14 for safe manual exhaust. Both lines are connected downstream with a fourth safety valve R16 for safe discharge of the liquid methane tank.

[0105] The liquid methane tank R1 is provided with a liquid methane tank level gauge RL for monitoring the tank liquid level. A liquid methane tank pressure sensor RP for monitoring the tank pressure is provided downstream of the liquid methane tank booster line r2 near the liquid methane tank R1.

[0106] The liquid oxygen subcooling module W is used to subcool the liquid oxygen flowing out of the liquid oxygen storage tank P1, and includes a liquid oxygen subcooler W1. The first liquid nitrogen storage module A provides subcoolant to the liquid oxygen subcooler W1 through the first liquid nitrogen filling pipeline a3. The liquid oxygen subcooler W1 is connected to the low-pressure liquid oxygen storage tank filling pipeline p3 through the liquid oxygen subcooler liquid inlet pipeline w1, and the liquid oxygen in the liquid oxygen storage tank P1 is introduced into the liquid oxygen subcooler W1 for subcooling. The liquid oxygen subcooler W1 also has a liquid oxygen subcooler liquid outlet pipeline w2, which is connected to the low-pressure liquid oxygen storage tank filling pipeline p3 and the high-pressure liquid oxygen storage tank filling pipeline p4 respectively, and provides subcooled liquid oxygen to the liquid oxygen delivery module Y.

[0107] A liquid oxygen subcooler inlet valve W2 is provided on the liquid oxygen subcooler inlet pipeline w1.

[0108] The liquid oxygen subcooler outlet pipe w2 is provided with a liquid oxygen subcooler outlet valve W3 and a liquid oxygen subcooler outlet temperature sensor WT.

[0109] The liquid oxygen subcooler W1 is provided with a liquid oxygen subcooler liquid level sensor WL for detecting the liquid level height.

[0110] The liquid methane subcooling module V is used to subcool the liquid oxygen flowing out of the liquid methane storage tank R1 and includes a liquid methane subcooler V1. A second liquid nitrogen storage module B provides subcoolant to the liquid methane subcooler V1 via a third liquid nitrogen filling line b3. The liquid methane subcooler V1 is connected to the low-pressure liquid methane storage tank filling line r3 via a liquid methane subcooler liquid inlet line v1, which directs liquid methane from the liquid methane storage tank R1 into the liquid methane subcooler V1 for subcooling. The liquid methane subcooler V1 also includes a liquid methane subcooler liquid outlet line v2, which is connected to the low-pressure liquid methane storage tank filling line r3 and the high-pressure liquid methane storage tank filling line r4, respectively, to provide subcooled liquid methane to the liquid methane delivery module X.

[0111] A liquid methane subcooler liquid inlet valve V2 is provided on the liquid methane subcooler liquid inlet pipeline v1.

[0112] The liquid methane subcooler outlet pipe v2 is provided with a liquid methane subcooler outlet valve V3 and a liquid methane subcooler outlet temperature sensor VT.

[0113] The liquid methane subcooler V1 is provided with a liquid methane subcooler liquid level sensor WL for detecting the liquid level height.

[0114] The test stations include: engine vehicle test station M and engine assembly test station Z. Among them, the engine vehicle test station M is connected to the liquid oxygen delivery module Y and the liquid methane delivery module X for low-pressure test.

[0115] The engine assembly test station Z is connected to the liquid oxygen delivery module Y and the liquid methane delivery module X, and is used for high-pressure test and high-low pressure test.

[0116] In a specific embodiment of the present invention, the control module includes a first control device HK1, a second control device HK2, a third control device HK3, a fourth control device HK4, a fifth control device HK, and a sixth control device HK6. The first control device HK1 controls the connection between the first liquid nitrogen storage module A, the liquid oxygen storage module B, and the liquid oxygen subcooling module W. The second control device HK2 controls the connection between the second liquid nitrogen storage module B, the liquid methane storage module R, and the liquid methane subcooling module V. The third control device HK3 controls the connection between the liquid oxygen delivery module Y, the gas production module C, and the gas distribution module D. The fourth control device HK4 controls the connection between the liquid oxygen delivery module Y and the gas distribution module D. The fifth control device HK5 and the sixth control device HK6 both control the connection between the liquid methane delivery module X and the gas distribution module D.

[0117] In a specific embodiment of the present invention, the liquid circuit system further includes: a liquid oxygen recovery module S and a liquid methane recovery module U. The liquid oxygen recovery module S is connected to the liquid oxygen delivery module Y through a pipeline to recover the liquid oxygen and its vaporized gas in the pipeline.

[0118] The liquid methane recovery module U is connected to the liquid methane delivery module X through a pipeline, and is used to recover the liquid methane and its gasified gas in the pipeline.

[0119] The liquid oxygen recovery module S pressurizes and transports the recovered liquid oxygen to the liquid oxygen storage tank of the liquid oxygen storage module P or the liquid oxygen delivery module Y through a pipeline.

[0120] The liquid methane recovery module U pressurizes and transports the liquid methane recovered inside it through a pipeline to the liquid methane storage module R or the liquid methane storage tank of the liquid methane transportation module X.

[0121] In this embodiment, the liquid oxygen recovery module S includes a liquid oxygen collection tank S1, which is connected to the various infusion pipelines of the liquid oxygen delivery module Y via pipelines to recover the liquid oxygen and vaporized gas from the pipelines. The liquid oxygen collection tank S1 is also connected to the low-pressure liquid oxygen storage tank filling pipeline p3 or the high-pressure liquid oxygen storage tank filling pipeline p4 via the liquid oxygen collection tank recovery pipeline s1, transporting the collected liquid oxygen to the liquid oxygen storage tank of the liquid oxygen reservoir module P or the liquid oxygen delivery module Y. The liquid oxygen collection tank S1 is also equipped with a liquid oxygen collection tank safety discharge pipeline s2 for gas discharge. The liquid oxygen collection tank safety discharge pipeline s2 is equipped with a liquid oxygen collection tank discharge bypass pipeline s3 for auxiliary discharge.

[0122] The liquid oxygen collection tank recovery pipeline s1 is sequentially provided with a liquid oxygen collection tank recovery valve S4 and a liquid oxygen recovery line filter S5.

[0123] A liquid oxygen collecting tank discharge safety valve S2 is provided on the liquid oxygen collecting tank safety discharge pipeline S2 for safely discharging the liquid oxygen collecting tank.

[0124] The liquid oxygen collecting tank discharge bypass line S3 is provided with a liquid oxygen collecting tank discharge bypass valve S3 for controlling the opening and closing of the bypass line.

[0125] The liquid oxygen collecting tank S1 is provided with a liquid oxygen collecting tank level gauge SL and a liquid oxygen collecting tank pressure sensor SP.

[0126] The liquid methane recovery module U includes a liquid methane collection tank U1, which is connected to the various liquid infusion pipelines of the liquid methane delivery module X via pipelines to recover liquid methane in the pipelines and the gas generated by the liquid methane vaporization. The liquid methane collection tank U1 also connects to the low-pressure liquid methane storage tank refill pipeline r3 or the high-pressure liquid methane storage tank refill pipeline r4 via the liquid methane collection tank recovery pipeline u1, transporting the collected liquid methane to the liquid methane storage module R or the liquid methane storage tank of the liquid methane delivery module X. The liquid methane collection tank U1 is also equipped with a liquid methane collection tank safety drain pipeline u2 for gas discharge. This drain pipeline u2 is also equipped with a liquid methane collection tank discharge bypass pipeline u3 for auxiliary discharge.

[0127] The liquid methane collection tank recovery pipeline u1 is sequentially provided with a liquid methane collection tank recovery valve U4 and a liquid methane recovery line filter U5.

[0128] A liquid methane collecting tank discharge safety valve U2 is provided on the liquid methane collecting tank safety discharge pipeline u2 for the safe discharge of the liquid methane collecting tank.

[0129] A liquid methane collection tank discharge bypass valve U3 is provided on the liquid methane collection tank discharge bypass pipeline u3 to control the opening and closing of the bypass pipeline.

[0130] The liquid methane collecting tank U1 is provided with a liquid methane collecting tank level gauge UL and a liquid methane collecting tank pressure sensor UP.

[0131] In a specific embodiment of the present invention, the liquid oxygen delivery module Y comprises a low-pressure liquid oxygen delivery module and a high-pressure liquid oxygen delivery module. The low-pressure liquid oxygen delivery module comprises a low-pressure liquid oxygen storage tank O1, a low-pressure liquid oxygen main line y1, and a low-pressure liquid oxygen branch line y2, which are used to deliver low-pressure liquid oxygen for testing to the complete engine test station M and the engine assembly test station Z. The low-pressure liquid oxygen main line y1 connects the low-pressure liquid oxygen storage tank O1 with the complete engine test station M, providing low-pressure liquid oxygen for testing. The low-pressure liquid oxygen branch line y2 is connected to the low-pressure liquid oxygen main line y1 at its upstream end and to the liquid oxygen inlet of the gas generator Z2 at the engine assembly test station Z at its downstream end, providing low-pressure liquid oxygen for testing. The upstream end of the low-pressure liquid oxygen main line y1 is connected to the liquid oxygen collection tank S1 of the liquid oxygen recovery module S via the low-pressure liquid oxygen exhaust line y6, for recovering liquid oxygen vapor.

[0132] The downstream end of the low-pressure liquid oxygen branch line y2 connects to the downstream of the low-pressure liquid oxygen exhaust line y6 via the gas generator low-pressure liquid oxygen drain line y4, and then to the liquid oxygen collection tank S1 of the liquid oxygen recovery module S for liquid oxygen recovery. The downstream end of the low-pressure liquid oxygen main line y1 connects to the gas generator low-pressure liquid oxygen drain line y4 via the engine low-pressure liquid oxygen drain line y8, and then to the liquid oxygen collection tank S1 of the liquid oxygen recovery module S for liquid oxygen recovery.

[0133] In this embodiment, the upstream end of the low-pressure liquid oxygen main line y1, along the delivery direction, is equipped with a low-pressure liquid oxygen tank outlet valve Y1 for controlling liquid discharge and a low-pressure liquid oxygen turbine flowmeter Y2. Along the downstream end, the engine low-pressure liquid oxygen shut-off valve Y3, a low-pressure liquid oxygen bellows Y4 for eliminating stress and deformation during pipeline pre-cooling, an engine low-pressure liquid oxygen pump inlet filter Y5, a low-pressure liquid oxygen pressure sensor YP1 for monitoring the engine liquid oxygen inlet pressure, and a low-pressure liquid oxygen temperature sensor YT1 for monitoring the engine liquid oxygen inlet temperature are sequentially arranged. The upstream end of the low-pressure liquid oxygen branch line y2 is connected to the low-pressure liquid oxygen main line y1 between the low-pressure liquid oxygen turbine flowmeter Y2 and the low-pressure liquid oxygen shut-off valve Y3. Along the liquid oxygen flow direction, the low-pressure liquid oxygen branch pipeline y2 is sequentially provided with a gas generator liquid oxygen low-pressure circuit cut-off valve Y6, a gas generator liquid oxygen low-pressure circuit bellows Y7 for eliminating stress deformation during pipeline pre-cooling, a gas generator liquid oxygen inlet filter Y8, a gas generator liquid oxygen low-pressure circuit pressure sensor YP3 for monitoring the gas generator liquid oxygen inlet pressure, and a gas generator liquid oxygen low-pressure circuit temperature sensor YT3 for monitoring the gas generator liquid oxygen inlet temperature.

[0134] A gas generator liquid oxygen low-pressure line drain valve Y9 for pre-cooling and draining the pipeline is provided upstream of the gas generator liquid oxygen low-pressure line drain pipeline y4.

[0135] A liquid oxygen low-pressure exhaust valve Y10 for exhausting pipeline pre-cooling is provided upstream of the liquid oxygen low-pressure exhaust pipeline y6, and a liquid oxygen collection tank inlet valve Y19 for controlling liquid inlet is provided downstream of the liquid oxygen collection tank S1.

[0136] A complete engine liquid oxygen low-pressure line drain valve Y18 for pre-cooling and draining the pipeline is provided downstream of the complete engine liquid oxygen low-pressure line drain pipeline y8.

[0137] The low-pressure liquid oxygen storage tank O1 is provided with a low-pressure liquid oxygen storage tank level gauge OL1 for detecting the liquid level height.

[0138] The supercooled liquid oxygen in the liquid oxygen supercooler W1 of the liquid oxygen supercooling module W is transported to the low-pressure liquid oxygen storage tank O1 through the liquid oxygen supercooler outlet pipeline w2 and the low-pressure liquid oxygen storage tank filling pipeline p3 to be used during the test run.

[0139] Another filling process without supercooling the liquid oxygen is that the liquid oxygen in the liquid oxygen storage tank P1 is directly transported to the low-pressure liquid oxygen storage tank O1 through the low-pressure liquid oxygen storage tank filling pipeline p3 to be used during the test run.

[0140] The upper part of the low-pressure liquid oxygen storage tank O1 is connected to the gas distribution module D through the first boosting module E for gas distribution and pressure boosting, and is depressurized through the first discharge module J. The third control device HK3 controls the connection between the first boosting module E and the first discharge module J for remote control.

[0141] In this embodiment, the first boosting module E is used to perform low-pressure gas distribution to the low-pressure liquid oxygen storage tank O1. It includes a parallel liquid oxygen low-pressure main boosting pipeline e1 and a liquid oxygen low-pressure auxiliary boosting pipeline e2. The upstream of both pipelines are connected to the gas distribution module D, and the downstream of the liquid oxygen low-pressure auxiliary boosting pipeline e2 is merged and connected to the liquid oxygen low-pressure main boosting pipeline e1. The downstream of the liquid oxygen low-pressure main boosting pipeline e1 is connected to the low-pressure liquid oxygen storage tank O1 for pressurization.

[0142] The first liquid oxygen main boost solenoid valve E1, the first liquid oxygen main boost orifice plate E3, the liquid oxygen low-pressure boost filter E5, the liquid oxygen low-pressure boost manual valve E6 and the liquid oxygen low-pressure tank pressure sensor EP are arranged in sequence along the air flow direction on the liquid oxygen low-pressure main boost pipeline e1.

[0143] The first liquid oxygen auxiliary booster solenoid valve E2 and the first liquid oxygen auxiliary booster orifice plate E4 are sequentially arranged on the liquid oxygen low-pressure auxiliary booster pipeline e2 along the air flow direction.

[0144] The first discharge module J is used to relieve the pressure of the low-pressure liquid oxygen storage tank O1. It includes a liquid oxygen low-pressure boost discharge pipeline j1 connected to the top of the low-pressure liquid oxygen storage tank O1. A liquid oxygen low-pressure bypass exhaust pipeline j2 and a liquid oxygen low-pressure anti-pressure pipeline j3 are arranged in parallel on the liquid oxygen low-pressure boost discharge pipeline j1.

[0145] The liquid oxygen low-pressure boost discharge pipeline j1 is provided with a first safety discharge manual valve J1, a first discharge safety valve J2 and a first exhaust muffler J6 in sequence along the deflation direction.

[0146] A first bypass discharge valve J3 is provided on the liquid oxygen low-pressure bypass exhaust pipeline j2.

[0147] The first anti-pressure holding-up manual valve J4 and the first check valve J5 are sequentially provided on the liquid oxygen low-pressure anti-pressure holding-up pipeline j3 along the deflation direction.

[0148] The high-pressure liquid oxygen delivery module includes a high-pressure liquid oxygen storage tank O2 and a high-pressure liquid oxygen main line y3, which is used to deliver high-pressure liquid oxygen for testing to the engine assembly test station Z. The high-pressure liquid oxygen main line y3 connects the high-pressure liquid oxygen storage tank O2 with the liquid oxygen inlet of the turbo pump Z1 at the engine assembly test station Z, providing high-pressure liquid oxygen for testing. The upstream end of the high-pressure liquid oxygen main line y3 connects to the low-pressure liquid oxygen exhaust line y6 via the high-pressure liquid oxygen exhaust line y7, and then to the liquid oxygen collection tank S1 of the liquid oxygen recovery module S for liquid oxygen vapor recovery.

[0149] The downstream of the high-pressure liquid oxygen main line y3 is connected to the gas generator liquid oxygen low-pressure line drain line y4 through the liquid oxygen high-pressure line drain line y5, and then connected to the liquid oxygen collection tank S1 of the liquid oxygen recovery module S for liquid oxygen recovery.

[0150] In this embodiment, the high-pressure liquid oxygen main line y3 is provided with a high-pressure liquid oxygen tank outlet valve Y11, a liquid oxygen high-pressure line turbine flowmeter Y12, a liquid oxygen high-pressure line filter Y13, a liquid oxygen high-pressure line cavitation tube Y14 for adjusting the liquid oxygen flow rate, a liquid oxygen high-pressure line pressure sensor YP2, a liquid oxygen high-pressure line temperature sensor YT2 and a turbine pump liquid oxygen inlet valve Y15 for liquid inlet control in sequence along the conveying direction.

[0151] A liquid oxygen high-pressure circuit drain valve Y16 for pre-cooling and draining the pipeline is provided on the liquid oxygen high-pressure circuit drain pipeline y5.

[0152] A liquid oxygen high-pressure exhaust valve Y17 is provided on the liquid oxygen high-pressure exhaust pipeline y7 for exhausting the pipeline pre-cooling.

[0153] The high-pressure liquid oxygen storage tank O2 is provided with a high-pressure liquid oxygen storage tank level gauge OL2 for detecting the liquid level.

[0154] The supercooled liquid oxygen in the liquid oxygen supercooler W1 of the liquid oxygen supercooling module W is transported to the high-pressure liquid oxygen storage tank O2 through the liquid oxygen supercooler liquid outlet pipeline w2 and the high-pressure liquid oxygen storage tank filling pipeline p4 to be used during the test run.

[0155] Another filling process without supercooling the liquid oxygen is that the liquid oxygen in the liquid oxygen storage tank P1 is directly transported to the high-pressure liquid oxygen storage tank O2 through the low-pressure liquid oxygen storage tank filling pipeline p3 and the high-pressure liquid oxygen storage tank filling pipeline p4 to be used during the test run.

[0156] The upper part of the high-pressure liquid oxygen storage tank O2 is connected to the gas distribution module D through the second boosting module G for gas distribution and pressure boosting, and is depressurized through the second discharge module L. The fourth control device HK4 controls the connection between the second boosting module G and the second discharge module L for remote control.

[0157] In this embodiment, the second boosting module G is used to distribute high-pressure gas to the high-pressure liquid oxygen storage tank O2. It includes a liquid oxygen high-pressure main boosting pipeline g1 and a liquid oxygen high-pressure auxiliary boosting pipeline g2 connected in parallel. The upstream of both pipelines are connected to the gas distribution module D, and the downstream of the liquid oxygen high-pressure auxiliary boosting pipeline g2 is merged and connected to the liquid oxygen high-pressure main boosting pipeline g1. The downstream of the liquid oxygen high-pressure main boosting pipeline g1 is connected to the high-pressure liquid oxygen storage tank O2 for pressurization.

[0158] The second liquid oxygen main boost solenoid valve G1, the second liquid oxygen main boost orifice plate G3, the liquid oxygen high-pressure boost filter G5, the liquid oxygen high-pressure boost manual valve G6 and the liquid oxygen high-pressure tank pressure sensor GP are arranged in sequence along the air flow direction on the liquid oxygen high-pressure main boost pipeline g1.

[0159] A second liquid oxygen auxiliary booster solenoid valve G2 and a second liquid oxygen auxiliary booster orifice plate G4 are sequentially arranged on the liquid oxygen high-pressure auxiliary booster pipeline g2 along the air flow direction.

[0160] The second discharge module L relieves the pressure of the high-pressure liquid oxygen storage tank O2. It includes a liquid oxygen high-pressure boost discharge pipeline l1 connected to the top of the high-pressure liquid oxygen storage tank O2. A liquid oxygen high-pressure bypass exhaust pipeline l2 and a liquid oxygen high-pressure anti-pressure pipeline l3 are arranged in parallel on the liquid oxygen high-pressure boost discharge pipeline l1.

[0161] The liquid oxygen high-pressure boost discharge pipeline l1 is provided with a second safety discharge manual valve L1, a second discharge safety valve L2 and a second exhaust muffler L6 in sequence along the deflation direction.

[0162] A second bypass discharge valve L3 is provided on the liquid oxygen high-pressure bypass exhaust pipeline L2.

[0163] A second anti-pressure holding manual valve L4 and a second check valve L5 are sequentially provided on the liquid oxygen high-pressure anti-pressure holding pipeline L3 along the direction of gas release.

[0164] In a specific embodiment of the present invention, the liquid methane delivery module X comprises a low-pressure liquid methane delivery module and a high-pressure liquid methane delivery module. The low-pressure liquid methane delivery module comprises a low-pressure liquid methane storage tank O4, a low-pressure liquid methane main line x1, and a low-pressure liquid methane branch line x2, and is used to deliver low-pressure liquid methane for testing to the complete engine test station M and the engine assembly test station Z. The low-pressure liquid methane main line x1 connects the low-pressure liquid methane storage tank O4 and the complete engine test station M, providing low-pressure liquid methane for testing. The low-pressure liquid methane branch line x2 is connected to the low-pressure liquid methane main line x1 at its upstream end and to the liquid methane inlet of the gas generator Z2 at the engine assembly test station Z at its downstream end, providing low-pressure liquid methane for testing. The upstream end of the low-pressure liquid methane main line x1 is connected to the liquid methane collection tank U1 of the liquid methane recovery module U through the liquid methane low-pressure exhaust line x6 to recover the liquid methane gasification gas.

[0165] The downstream end of the low-pressure liquid methane branch line x2 connects to the downstream of the low-pressure liquid methane exhaust line x6 via the gas generator low-pressure liquid methane drain line x4, and then to the liquid methane collection tank U1 of the liquid methane recovery module U for liquid methane recovery. The downstream end of the low-pressure liquid methane main line x1 connects to the gas generator low-pressure liquid methane drain line x4 via the engine low-pressure liquid methane drain line x8, and then to the liquid methane collection tank U1 of the liquid methane recovery module U for liquid methane recovery.

[0166] In this embodiment, the low-pressure liquid methane main line x1 is equipped with a low-pressure liquid methane tank outlet valve X1 for controlling liquid discharge and a low-pressure liquid methane turbine flowmeter X2 at its upstream end along the delivery direction. Along the downstream end, the low-pressure liquid methane shut-off valve X3 for the entire engine, a low-pressure liquid methane bellows X4 for eliminating stress and deformation during pipeline pre-cooling, a low-pressure liquid methane pump inlet filter X5, a low-pressure liquid methane pressure sensor XP1 for monitoring the engine liquid methane inlet pressure, and a low-pressure liquid methane temperature sensor XT1 for monitoring the engine liquid methane inlet temperature are installed. The upstream end of the low-pressure liquid methane branch line x2 is connected to the low-pressure liquid methane main line x1 between the low-pressure liquid methane turbine flowmeter X2 and the low-pressure liquid methane shut-off valve X3. Along the liquid methane flow direction, the low-pressure liquid methane branch pipeline x2 is sequentially provided with a gas generator liquid methane low-pressure circuit cut-off valve X6, a gas generator liquid methane low-pressure circuit bellows X7 for eliminating stress deformation during pipeline pre-cooling, a gas generator liquid methane inlet filter X8, a gas generator liquid methane low-pressure circuit pressure sensor XP3 for monitoring the gas generator liquid methane inlet pressure, and a gas generator liquid methane low-pressure circuit temperature sensor XT3 for monitoring the gas generator liquid methane inlet temperature.

[0167] A gas generator liquid methane low-pressure line drain valve X9 for pre-cooling and draining the pipeline is provided upstream of the gas generator liquid methane low-pressure line drain pipeline x4.

[0168] A liquid methane low-pressure exhaust valve X10 for exhaust during pipeline pre-cooling is provided upstream of the liquid methane low-pressure exhaust pipeline x6, and a liquid methane collection tank inlet valve X19 for controlling liquid inlet is provided downstream of the liquid methane collection tank S1.

[0169] A complete engine liquid methane low-pressure line drain valve X18 for pre-cooling and draining the pipeline is provided downstream of the complete engine liquid methane low-pressure line drain pipeline X8.

[0170] The low-pressure liquid methane storage tank O4 is provided with a low-pressure liquid methane storage tank level gauge OL4 for detecting the liquid level height.

[0171] The liquid methane supercooled in the liquid methane supercooler V1 of the liquid methane supercooling module V is transported to the low-pressure liquid methane storage tank O4 through the liquid methane supercooler outlet pipeline v2 and the low-pressure liquid methane storage tank filling pipeline r3 to be used during the test run.

[0172] Another filling process without supercooling the liquid methane is that the liquid methane in the liquid methane storage tank R1 is directly transported to the low-pressure liquid methane storage tank O4 through the low-pressure liquid methane storage tank filling pipeline r3 to be used during the test run.

[0173] The upper portion of the low-pressure liquid methane storage tank O4 is connected to the gas distribution module D through the fourth boosting module F for gas distribution and pressure boosting, and is depressurized through the fourth discharge module K. The sixth control device HK6 controls the connection between the fourth boosting module F and the fourth discharge module K for remote control.

[0174] In this embodiment, the fourth boosting module F is used to perform low-pressure gas distribution to the low-pressure liquid methane storage tank O4. It includes a parallel liquid methane low-pressure main boosting pipeline f1 and a liquid methane low-pressure auxiliary boosting pipeline f2. The upstream of both pipelines are connected to the gas distribution module D, and the downstream of the liquid methane low-pressure auxiliary boosting pipeline f2 is merged and connected to the liquid methane low-pressure main boosting pipeline f1. The downstream of the liquid methane low-pressure main boosting pipeline f1 is connected to the low-pressure liquid methane storage tank O4 for pressurization.

[0175] The fourth liquid methane main boost solenoid valve F1, the fourth liquid methane main boost orifice plate F3, the liquid methane low-pressure boost filter F5, the liquid methane low-pressure boost manual valve F6 and the liquid methane low-pressure tank pressure sensor FP are arranged in sequence along the airflow direction on the liquid methane low-pressure main boost pipeline f1.

[0176] A fourth liquid methane auxiliary booster solenoid valve F2 and a fourth liquid methane auxiliary booster orifice plate F4 are sequentially provided on the liquid methane low-pressure auxiliary booster pipeline f2 along the airflow direction.

[0177] The fourth discharge module K is used to relieve pressure from the low-pressure liquid methane storage tank O4. It includes a low-pressure liquid methane boost discharge line k1 connected to the top of the low-pressure liquid methane storage tank O4. A low-pressure liquid methane bypass exhaust line k2 and a low-pressure liquid methane pressure-blocking prevention line k3 are connected in parallel to this low-pressure liquid methane boost discharge line k1. Furthermore, a fourth safety discharge manual valve K1, a fourth discharge safety valve K2, a second methane discharge flame arrester K6, and a fourth exhaust muffler K7 are sequentially installed along this low-pressure liquid methane boost discharge line k1 in the discharge direction.

[0178] A fourth bypass discharge valve K3 is provided on the liquid methane low-pressure bypass exhaust pipeline k2.

[0179] The fourth anti-pressure holding-up manual valve K4 and the fourth check valve K5 are sequentially arranged on the liquid methane low-pressure anti-pressure holding-up pipeline K3 along the degassing direction.

[0180] The high-pressure liquid methane delivery module includes a high-pressure liquid methane storage tank O3 and a high-pressure liquid methane main line x3, which is used to deliver high-pressure liquid methane for testing to the engine assembly test station Z. The high-pressure liquid methane main line x3 connects the high-pressure liquid methane storage tank O3 with the liquid methane inlet of the turbine pump Z1 at the engine assembly test station Z, providing high-pressure liquid methane for testing. The upstream end of the high-pressure liquid methane main line x3 connects to the low-pressure liquid methane exhaust line x6 via the high-pressure liquid methane exhaust line x7, and then to the liquid methane collection tank U1 of the liquid methane recovery module U for gaseous liquid methane recovery.

[0181] The downstream of the high-pressure liquid methane main line x3 is connected to the gas generator liquid methane low-pressure line drain line x4 through the liquid methane high-pressure line drain line x5, and then connected to the liquid methane collection tank U1 of the liquid methane recovery module U for liquid methane recovery.

[0182] In this embodiment, the high-pressure liquid methane main line x3 is provided with a high-pressure liquid methane tank outlet valve X11, a liquid methane high-pressure line turbine flowmeter X12, a liquid methane high-pressure line filter X13, a liquid methane high-pressure line cavitation tube X14 for adjusting the liquid methane flow rate, a liquid methane high-pressure line pressure sensor XP2, a liquid methane high-pressure line temperature sensor XT2 and a turbine pump liquid methane inlet valve X15 for liquid inlet control in sequence along the conveying direction.

[0183] The liquid methane high-pressure circuit drain pipeline x5 is provided with a liquid methane high-pressure circuit drain valve X16 for pre-cooling and draining the pipeline.

[0184] The liquid methane high-pressure exhaust pipeline x7 is provided with a liquid methane high-pressure exhaust valve X17 for exhausting the pipeline pre-cooling.

[0185] The high-pressure liquid methane storage tank O3 is provided with a high-pressure liquid methane storage tank level gauge OL3 for detecting the liquid level.

[0186] The liquid methane supercooled in the liquid methane supercooler V1 of the liquid methane supercooling module V is transported to the high-pressure liquid methane storage tank O3 through the liquid methane supercooler outlet pipeline v2 and the high-pressure liquid methane storage tank filling pipeline r4 to be used during the test run.

[0187] Another filling process without supercooling the liquid methane is that the liquid methane in the liquid methane storage tank R1 is directly transported to the high-pressure liquid methane storage tank O3 through the low-pressure liquid methane storage tank filling pipeline r3 and the high-pressure liquid methane storage tank filling pipeline r4 to be used during the test run.

[0188] The upper portion of the high-pressure liquid methane storage tank O3 is connected to the gas distribution module D through the third boosting module H for gas distribution and pressure boosting, and is depressurized through the third discharge module N. The fifth control device HK5 controls the connection between the third boosting module H and the third discharge module N for remote control.

[0189] In this embodiment, the third boosting module H is used to distribute high-pressure gas to the high-pressure liquid methane storage tank O3. It includes a parallel liquid methane high-pressure main boosting pipeline h1 and a liquid methane high-pressure auxiliary boosting pipeline h2. The upstream of both pipelines are connected to the gas distribution module D, and the downstream of the liquid methane high-pressure auxiliary boosting pipeline h2 is merged and connected to the liquid methane high-pressure main boosting pipeline h1. The downstream of the liquid methane high-pressure main boosting pipeline h1 is connected to the high-pressure liquid methane storage tank O3 for pressurization.

[0190] The third liquid methane main boost solenoid valve H1, the third liquid methane main boost orifice plate H3, the liquid methane high-pressure boost filter H5, the liquid methane high-pressure boost manual valve H6 and the liquid methane high-pressure storage tank pressure sensor HP are arranged in sequence along the airflow direction on the liquid methane high-pressure main boost pipeline h1.

[0191] A third liquid methane auxiliary increase solenoid valve H2 and a third liquid methane auxiliary increase orifice plate H4 are sequentially arranged on the liquid methane high-pressure auxiliary increase pipeline h2 along the air flow direction.

[0192] The third emission module N relieves the pressure of the high-pressure liquid methane storage tank O3, which includes a liquid methane high-pressure boost discharge pipeline n1 connected to the top of the high-pressure liquid methane storage tank O3, and a liquid methane high-pressure bypass exhaust pipeline n2 and a liquid methane high-pressure anti-pressure pipeline n3 are arranged in parallel on the liquid methane high-pressure boost discharge pipeline n1.

[0193] The liquid methane high-pressure boost discharge pipeline n1 is provided with a third safety discharge manual valve N1, a third discharge safety valve N2, a first methane discharge flame arrester N6 and a third exhaust muffler N7 in sequence along the discharge direction.

[0194] A third bypass discharge valve N3 is provided on the liquid methane high-pressure bypass exhaust pipeline n2.

[0195] A third anti-pressure holding manual valve N4 and a third check valve N5 are sequentially provided on the liquid methane high-pressure anti-pressure holding pipeline n3 along the direction of gas release.

[0196] In a specific embodiment of the present invention, the engine vehicle test station M is a complete engine M1 for low-pressure test.

[0197] The low-pressure liquid oxygen storage tank O1 is connected to the liquid oxygen inlet of the complete engine M1 through the low-pressure liquid oxygen main line y1 to provide low-pressure liquid oxygen for test running.

[0198] The low-pressure liquid methane storage tank O4 is connected to the liquid methane inlet of the complete engine M1 through the low-pressure liquid methane main line x1 to provide low-pressure liquid methane for test running.

[0199] The engine assembly test station Z comprises a turbo pump Z1 and a gas generator Z2.

[0200] The low-pressure liquid oxygen storage tank O1 is connected to the liquid oxygen inlet of the gas generator Z2 through the low-pressure liquid oxygen main line y1 and the low-pressure liquid oxygen branch line y2 to provide low-pressure liquid oxygen for the test run.

[0201] The high-pressure liquid oxygen storage tank O2 is connected to the liquid oxygen inlet of the turbo pump Z1 through the high-pressure liquid oxygen main line y3 to provide high-pressure liquid oxygen for the test run.

[0202] The low-pressure liquid methane storage tank O4 is connected to the liquid methane inlet of the gas generator Z2 through the low-pressure liquid methane main line x1 and the low-pressure liquid methane branch line x2 to provide low-pressure liquid methane for test operation.

[0203] The high-pressure liquid methane storage tank O3 is connected to the liquid methane inlet of the turbo pump Z1 through the high-pressure liquid methane main line x3 to provide high-pressure liquid methane for test operation.

[0204] In a specific embodiment of the present invention, the gas production module C includes a liquid nitrogen storage tank C1, a liquid nitrogen plunger pump C2, a liquid nitrogen vaporizer C3, and a high-pressure nitrogen cylinder assembly C4. Liquid nitrogen from the first liquid nitrogen storage module A is added to the liquid nitrogen storage tank C1 via a second liquid nitrogen filling pipeline a5. The liquid nitrogen is then pumped into the liquid nitrogen vaporizer C3 by the liquid nitrogen plunger pump C2 for vaporization. The vaporized nitrogen is then stored in the high-pressure nitrogen cylinder assembly C4.

[0205] High-pressure nitrogen gas from the cylinder group C4 is delivered to the nitrogen distribution module D via the nitrogen delivery main line C0. A high-pressure nitrogen gas delivery valve C5 is installed at the delivery port of the high-pressure nitrogen cylinder group C4 to control gas discharge from the cylinders. A high-pressure nitrogen pipeline isolation valve C6 is also installed on the nitrogen delivery main line C0 to isolate and cut off the high-pressure nitrogen pipeline. In this embodiment, the nitrogen gas source main line C0 is the high-pressure nitrogen gas source main line from the high-pressure nitrogen cylinder group C4 to the nitrogen distribution system D, with a gas source pressure of 30-35 MPa.

[0206] Furthermore, the nitrogen distribution module D includes a first distribution plate D1, a second distribution plate D2, a third distribution plate D3, and a fourth distribution plate D4, which are connected in parallel to the main nitrogen delivery line c0. The first distribution plate D1 is connected to the main nitrogen delivery line c0 via a first nitrogen branch line c1, and is also connected to the first boosting module E via a first boosting air supply line d1 for boosting air supply. Furthermore, the first distribution plate D1 is connected to the liquid oxygen collection tank recovery line s1 via a fifth boosting air supply line d5, which is used to pressurize the liquid oxygen collection tank S1. A liquid oxygen collection tank air supply valve D5 is provided downstream of the fifth boosting air supply line d5.

[0207] The second gas distribution plate D2 is connected to the nitrogen delivery main line c0 through the second nitrogen branch line c2, and the second gas distribution plate D2 is connected to the second boosting module G through the second boosting air supply line d2 for boosting air supply.

[0208] The third gas distribution plate D3 is connected to the nitrogen delivery main line c0 through the third nitrogen branch line c3, and the third gas distribution plate D3 is connected to the third supercharging module H through the third supercharging air supply line d3 for supercharging air supply.

[0209] The fourth gas distribution plate D4 is connected to the main nitrogen delivery line c0 via the fourth nitrogen branch line c4. Furthermore, the fourth gas distribution plate D4 is connected to the fourth booster module F via the fourth booster air supply line d4 for boosted air supply. Furthermore, the fourth gas distribution plate D4 is connected to the liquid methane collection tank recovery line u1 via the sixth booster air supply line d6, which is used to pressurize the liquid methane collection tank U1. A liquid methane collection tank air supply valve D6 is located downstream of the sixth booster air supply line d6.

[0210] The operation process of the multifunctional test system of the liquid oxygen-methane engine test bench is as follows:

[0211] (1) Filling or supercooling the liquid oxygen and liquid methane system propellants.

[0212] 1. When filling or subcooling the liquid oxygen system propellant.

[0213] The design pressure of the liquid oxygen storage module P is 1.6 MPa. The liquid oxygen storage tank exhaust manual valve P13 and the third safety discharge valve P14 remain normally open. The third self-operated exhaust valve P15 is set to a self-operated discharge pressure of 1.0 to 1.5 MPa. When the liquid oxygen storage tank P1 reaches the set discharge pressure value, the third self-operated exhaust valve P15 automatically opens to exhaust the liquid oxygen storage tank discharge pipeline P5, preventing the third safety valve P16 from tripping due to overpressure and protecting the service life of the third safety valve P16. The first control device HK1 automatically controls the operation of the liquid oxygen storage module P: the liquid oxygen filling valve P4 opens, and the liquid oxygen filling tank truck P2 fills the liquid oxygen storage tank P1 with liquid oxygen through the liquid oxygen storage tank filling pipeline P1. When the liquid level reaches the maximum value set by the liquid oxygen storage tank level gauge PL, the liquid oxygen filling valve P4 is interlocked and closed to stop filling. Open the third self-boosting device liquid inlet regulating valve P5 and the third self-boosting device outlet valve P7. Liquid oxygen is self-pressurized by the third self-boosting device P6 through the liquid oxygen storage tank self-boosting pipeline p2 to the liquid oxygen storage tank P1. The third self-boosting device liquid inlet regulating valve P5 adjusts the inlet flow of the third self-boosting device P6. When the liquid oxygen storage tank pressure sensor PP monitors the self-boosting pressure to be 0.5-0.9, the third self-boosting device liquid inlet regulating valve P5 and the third self-boosting device outlet valve P7 are closed. The third control device HK3 is used to open the first bypass drain valve J3, and the fourth control device HK4 is used to open the second bypass drain valve L3 to connect the low-pressure liquid oxygen storage tank O1 and the high-pressure liquid oxygen storage tank O2 to the atmosphere, facilitating the refilling of liquid oxygen. The first control device HK1 is used to open the liquid oxygen outlet valve P8, the liquid oxygen low-pressure tank inlet valve P10, and the liquid oxygen high-pressure tank inlet valve P12. Liquid oxygen is then added to the low-pressure liquid oxygen tank O1 through the low-pressure liquid oxygen tank filling pipeline P3, and to the high-pressure liquid oxygen tank O2 through the high-pressure liquid oxygen tank filling pipeline P4.

[0214] During supercooling filling, the first control device HK1 is used to control the liquid nitrogen to be filled into the first liquid nitrogen storage tank A1 by the first liquid nitrogen filling tank truck A2 through the first liquid nitrogen storage tank filling pipeline a1, and to self-pressurize the storage tank through the first self-boosting device liquid inlet regulating valve A5, the self-boosting device A6, the first self-boosting device outlet valve A7 and the first liquid nitrogen storage tank self-pressurizing pipeline a2. Then, the liquid nitrogen is provided to the liquid oxygen subcooler W1 through the first liquid nitrogen filling pipeline a3, the first liquid nitrogen outlet valve A8 and the liquid oxygen subcooler liquid nitrogen inlet valve A10. At the same time, liquid oxygen is supplied from liquid oxygen storage tank P1 via the low-pressure liquid oxygen storage tank refill line P3, the liquid oxygen subcooler inlet line W1, and the liquid oxygen subcooler inlet valve W2. The subcooling temperature is monitored by the liquid oxygen subcooler outlet temperature sensor WT. The subcooled liquid oxygen is then delivered from liquid oxygen subcooler W1 through the liquid oxygen subcooler outlet valve W3, the liquid oxygen subcooler outlet line W2, the low-pressure liquid oxygen storage tank refill line P3, and the high-pressure liquid oxygen storage tank refill line P4 to the low-pressure liquid oxygen storage tank O1 and high-pressure liquid oxygen storage tank O2, respectively. The subcooling process monitors the liquid level set by the liquid oxygen subcooler level sensor WL. If the liquid level exceeds this value, the liquid nitrogen refill to the liquid oxygen subcooler liquid nitrogen inlet valve A10 is shut off.

[0215] During filling or subcooling filling, the first control device HK1 is used for monitoring. When the low-pressure liquid oxygen storage tank level gauge OL1 and the high-pressure liquid oxygen storage tank level gauge OL2 reach the set maximum liquid level value, the liquid oxygen filling of the liquid oxygen outlet valve P8, the liquid oxygen low-pressure tank inlet valve P10 and the liquid oxygen high-pressure tank inlet valve P12 are closed, and the liquid nitrogen supply of the first liquid nitrogen outlet valve A8 and the liquid oxygen subcooler liquid nitrogen inlet valve A10 are closed. After the liquid oxygen filling or subcooling filling is completed, the first bypass discharge valve J3 and the second bypass discharge valve L3 are closed.

[0216] 2. When filling or supercooling the liquid methane system propellant.

[0217] The design pressure of the liquid methane storage module R is 1.6MPa. The liquid methane storage tank exhaust manual valve R13 and the fourth safety discharge valve R14 remain normally open. The fourth self-operated exhaust valve R15 is set to a self-operated discharge pressure of 1.0-1.5MPa. When the liquid methane storage tank R1 reaches the set discharge pressure value, the fourth self-operated exhaust valve R15 automatically opens to exhaust gas through the liquid methane storage tank discharge pipeline r5, preventing the fourth safety valve R16 from overpressure and tripping, thereby protecting the service life of the fourth safety valve R16. The second control device HK2 automatically controls the operation of the liquid methane storage module R: the liquid methane filling valve R4 is opened, and the liquid methane filling tank truck R2 fills the liquid methane storage tank R1 with liquid methane through the liquid methane storage tank filling pipeline r1. When the liquid level reaches the maximum value set by the liquid methane storage tank level gauge RL, the liquid methane filling valve R4 is interlocked and closed to stop filling. The fourth self-boosting device's liquid inlet regulating valve R5 and fourth self-boosting device's outlet valve R7 are opened. Liquid methane flows through the liquid methane storage tank's self-boosting pipeline r2 and is supplied to the liquid methane storage tank R1 for self-boosting using the third self-boosting device R6. The fourth self-boosting device's liquid inlet regulating valve R5 regulates the inlet flow rate to the third self-boosting device R6. When the liquid methane storage tank's pressure sensor RP detects a self-boosting pressure of 0.5-0.9, the fourth self-boosting device's liquid inlet regulating valve R5 and fourth self-boosting device's outlet valve R7 are closed. The fifth control device HK5 is used to open the third bypass drain valve N3, and the sixth control device HK6 is used to open the fourth bypass drain valve K3, allowing the high-pressure liquid methane storage tank O3 and the low-pressure liquid methane storage tank O4 to communicate with the atmosphere, facilitating liquid methane refilling. The second control device HK2 is used to open the liquid methane outlet valve R8, the liquid methane low-pressure tank inlet valve R10 and the liquid methane high-pressure tank inlet valve R12. Liquid methane is added to the low-pressure liquid methane storage tank O4 through the low-pressure liquid methane storage tank filling pipeline r3, and to the high-pressure liquid methane storage tank O3 through the high-pressure liquid methane storage tank filling pipeline r4.

[0218] During supercooling filling, the second control device HK2 is used to control the second liquid nitrogen filling tank truck B2 and the second liquid nitrogen storage tank filling pipeline b1 to fill the second liquid nitrogen storage tank B1 with liquid nitrogen, and after the storage tank is self-pressurized through the second self-boosting device liquid inlet regulating valve B5, the second self-boosting device B6, the second self-boosting device outlet valve B7, and the second liquid nitrogen storage tank self-pressurizing pipeline b2, the liquid nitrogen is supplied to the liquid methane subcooler V1 through the third liquid nitrogen filling pipeline b3, the second liquid nitrogen outlet valve B8, and the liquid methane subcooler liquid nitrogen inlet valve B10. At the same time, liquid methane is provided by the second liquid nitrogen storage tank B1 through the low-pressure liquid methane storage tank filling pipeline r3, the liquid methane subcooler inlet pipeline v1, and the liquid methane subcooler V1. The subcooling temperature value is monitored by the liquid methane subcooler outlet temperature sensor VT. The subcooled liquid methane is transported from the liquid methane subcooler V1 through the liquid methane subcooler outlet valve V3, the liquid methane subcooler outlet pipeline v2, the low-pressure liquid methane storage tank filling pipeline r3, and the high-pressure liquid methane storage tank filling pipeline r4 to the high-pressure liquid methane storage tank O3 and the low-pressure liquid methane storage tank O4. The liquid level value set by the liquid methane subcooler liquid level sensor VL is monitored during the subcooling process. If the liquid methane subcooler liquid level sensor VL exceeds the liquid level value, the liquid nitrogen filling of the liquid methane subcooler liquid nitrogen inlet valve B10 is chained and closed.

[0219] During filling or subcooling filling, when the high-pressure liquid methane storage tank level gauge OL3 and the low-pressure liquid methane storage tank level gauge OL4 reach the set maximum liquid level value, close the liquid methane outlet valve R8, the liquid methane low-pressure storage tank inlet valve R10 and the liquid methane high-pressure storage tank inlet valve R12 for liquid methane filling, close the second liquid nitrogen outlet valve B8 and the liquid methane subcooler liquid nitrogen inlet valve B10 for liquid nitrogen supply, and the filling or subcooling filling of liquid methane is completed, and close the fourth bypass discharge valve K3 and the third bypass discharge valve N3.

[0220] (2) Carry out gas production of liquid nitrogen gas production system and gas distribution of nitrogen gas distribution system.

[0221] Gas production module C is activated. Liquid nitrogen is supplied from liquid nitrogen tank C1. The resulting nitrogen, after passing through liquid nitrogen plunger pump C2 and liquid nitrogen vaporizer C3, is stored in high-pressure nitrogen cylinder assembly C4. When liquid nitrogen in liquid nitrogen tank C1 is insufficient, first liquid nitrogen storage module A1 delivers liquid nitrogen to liquid nitrogen tank C1 via first liquid nitrogen filling line a3, gas production tank liquid delivery valve A15, and second liquid nitrogen filling line a5. High-pressure nitrogen pipeline isolation valve C6 remains open, and third control device HK3 controls the opening of high-pressure nitrogen cylinder assembly delivery valve C5. High-pressure nitrogen is then delivered to nitrogen distribution module D via nitrogen main delivery line C0 and first nitrogen branch line C1. High-pressure nitrogen is then delivered from nitrogen main delivery line C0 and first nitrogen branch line C1 to first distribution panel D1, where it distributes liquid oxygen to the low-pressure system. The first gas distribution panel D1 is equipped with a pressure reducing valve. Based on the pressurization requirements of the liquid oxygen low-pressure test system, the gas distribution pressure is set to 4-5 MPa after decompression through the first gas distribution panel D1. The fourth control device HK4 controls the delivery of high-pressure nitrogen from the nitrogen main line c0 and the second nitrogen branch line c2 to the second gas distribution panel D2 for gas distribution to the liquid oxygen high-pressure system. The second gas distribution panel D2 is equipped with a pressure reducing valve. Based on the pressurization requirements of the liquid oxygen high-pressure test system, the gas distribution pressure is set to 21-23 MPa after decompression through the second gas distribution panel D2. The fifth control device HK5 controls the delivery of high-pressure nitrogen from the nitrogen main line c0 and the third nitrogen branch line c3 to the third gas distribution panel D3 for gas distribution to the liquid methane high-pressure system. The third gas distribution panel D3 is equipped with a pressure reducing valve. Based on the pressurization requirements of the liquid methane high-pressure test system, the gas distribution pressure is set to 21-23 MPa after decompression through the third gas distribution panel D3. Controlled by the sixth control device HK6, high-pressure nitrogen is delivered from the nitrogen main line c0 and the fourth nitrogen branch line c4 to the fourth gas distribution panel D4, which distributes gas to the liquid methane low-pressure system. The fourth gas distribution panel D4 is equipped with a pressure reducing valve. Based on the required pressure increase for the liquid methane low-pressure test system, the pressure at the fourth gas distribution panel D4 is set to 4-5 MPa after decompression.

[0222] (3) Conducting nitrogen pressurization of the liquid oxygen and methane low-pressure system, the liquid oxygen and methane high-pressure system, and the liquid oxygen and methane high and low systems, and conducting engine tests through the pressurization delivery system.

[0223] 1. When conducting the complete engine M1 test of the liquid oxygen-methane low-pressure system.

[0224] (1) First, pre-cool the medium in the liquid oxygen and methane low-pressure booster transmission system pipeline.

[0225] Low-pressure liquid oxygen delivery module: The first safety discharge manual valve J1 remains normally open, and pre-cooling is automatically controlled by the third control device HK3. The gas generator low-pressure liquid oxygen line shut-off valve Y6 is closed. First, the low-pressure liquid oxygen storage tank outlet valve Y1 and the complete engine low-pressure liquid oxygen line shut-off valve Y3 are opened. Liquid oxygen is delivered from the low-pressure liquid oxygen storage tank O1 via the low-pressure liquid oxygen main line y1 to the oxygen inlet of the complete engine M1 for pipeline pre-cooling. The liquid oxygen collection tank inlet valve Y19 is normally open. Then, the low-pressure liquid oxygen line exhaust valve Y10 is opened to pre-cool and release the gas generated by the vaporization heat exchange in the low-pressure liquid oxygen main line y1 during the initial pre-cooling process. The exhaust gas is delivered to the liquid oxygen collection tank S1 via the low-pressure liquid oxygen line exhaust line y6. When the engine's liquid oxygen low-pressure line temperature sensor YT1 shows that the oxygen inlet temperature is 91K~94K, the medium pre-cooling of the low-pressure liquid oxygen main line y1 pipeline basically meets the requirements, and the liquid oxygen low-pressure line exhaust valve Y10 is closed to stop exhaust.

[0226] Low-pressure liquid methane delivery module: The fourth safety discharge manual valve K1 remains normally open, and automatic pre-cooling is controlled by the sixth control device HK6. The gas generator liquid methane low-pressure line shut-off valve X6 is closed. First, the low-pressure liquid methane storage tank outlet valve X1 and the complete engine liquid methane low-pressure line shut-off valve X3 are opened. Liquid methane is delivered from the low-pressure liquid methane storage tank O4 via the low-pressure liquid methane main line x1 to the methane inlet of the complete engine M1 for pipeline pre-cooling. The liquid methane collection tank inlet valve X19 is normally open. Then, the liquid methane low-pressure line exhaust valve X10 is opened to pre-cool and release the gas generated by the vaporization heat exchange during the pre-cooling of the low-pressure liquid methane main line x1. The exhaust gas is delivered via the liquid methane low-pressure line exhaust line x6 to the liquid methane collection tank U1. When the engine liquid methane low-pressure line temperature sensor XT1 shows that the temperature of the methane inlet is 111K~114K, the medium pre-cooling of the low-pressure liquid methane main line x1 basically meets the requirements, and the liquid methane low-pressure line exhaust valve X10 is closed to stop exhaust.

[0227] (2) Then, the nitrogen in the liquid oxygen and methane low-pressure system tank is pressurized.

[0228] Low-pressure liquid oxygen storage tank: Keep the low-pressure liquid oxygen boost manual valve E6 open, close the low-pressure liquid oxygen anti-pressure congestion line J3, and open the air supply valve in the first air distribution panel D1 to deliver pressurized nitrogen gas to the front of the first liquid oxygen main boost solenoid valve E1 and the first liquid oxygen auxiliary boost solenoid valve E2. The third control device HK3 automatically controls the boost pressure, opens the first liquid oxygen main boost solenoid valve E1, and the distributed pressurized nitrogen gas flows from the first air distribution panel D1 through the first boost air supply line d1 and the low-pressure liquid oxygen main boost line e1 to the low-pressure liquid oxygen storage tank O1 for rapid nitrogen boosting at a high flow rate. Once the low-pressure liquid oxygen tank pressure sensor EP reaches the stable pressure value required for the test, the pressure is maintained at a stable state.

[0229] Low-pressure liquid methane storage tank: Keep the tank's low-pressure boost manual valve F6 open, close the fourth bypass drain valve K3, and open the air supply valve in the fourth air distribution panel D4 to deliver pressurized nitrogen gas to the fourth liquid methane main boost solenoid valve F1 and the fourth liquid methane auxiliary boost solenoid valve F2. The sixth control device HK6 automatically controls the boost pressure, opening the fourth liquid methane main boost solenoid valve F1. The distributed pressurized nitrogen flows from the fourth air distribution panel D4 through the fourth boost air supply line d4 and the liquid methane low-pressure main boost line f1 to the low-pressure liquid methane storage tank O4 for rapid, high-flow nitrogen boost. Once the liquid methane low-pressure tank pressure sensor FP reaches the stable pressure value required for the test, the pressure is maintained steady.

[0230] (3) Finally, an ignition test is conducted in which the liquid oxygen and methane low-pressure system medium is pressurized and transported to the engine.

[0231] When the nitrogen boost pressure in low-pressure liquid oxygen tank O1 and low-pressure liquid methane tank O4 reaches the set test value, the automatic sequence for the engine ignition test is initiated. Liquid oxygen and liquid methane are delivered through boost and compression, simultaneously transported to the complete engine M1 via low-pressure liquid oxygen main line y1 and low-pressure liquid methane main line x1, respectively, for ignition test. During the ignition test, the liquid levels in low-pressure liquid oxygen tank O1 and low-pressure liquid methane tank O4 are monitored simultaneously by low-pressure liquid oxygen tank level gauges OL1 and OL4.

[0232] During the ignition test, if the test operating conditions need to be changed and the nitrogen boost pressure needs to be rapidly increased, and if the boost pressure of the liquid oxygen low-pressure main booster line e1 does not meet the boosting capacity, the first liquid oxygen auxiliary booster solenoid valve E2 is opened, and the liquid oxygen low-pressure main booster line e1 and the liquid oxygen low-pressure auxiliary booster line e2 are used for simultaneous boosting. If the boost pressure of the liquid methane low-pressure main booster line f1 does not meet the boosting capacity, the fourth liquid methane auxiliary booster solenoid valve F2 is opened, and the liquid methane low-pressure main booster line f1 and the liquid methane low-pressure auxiliary booster line f2 are used for simultaneous boosting.

[0233] Upon completion of the ignition test of engine M1, the third control unit HK3 of the liquid oxygen low-pressure system opens the liquid oxygen low-pressure anti-pressure hold-up line J3 to vent the low-pressure liquid oxygen storage tank O1. The complete engine liquid oxygen low-pressure line drain valve Y18 is opened to drain the low-pressure liquid oxygen main line y1. The drained medium is discharged into the liquid oxygen collection tank S1 via the complete engine liquid oxygen low-pressure line drain line y8, the gas generator liquid oxygen low-pressure line drain line y4, and the liquid oxygen low-pressure line exhaust line y6. When the exhaust and discharge pressures to the liquid oxygen low-pressure tank pressure sensor EP and the complete engine liquid oxygen low-pressure line pressure sensor YP1 indicate values ​​within a reasonable range, the first bypass drain valve J3 and the complete engine liquid oxygen low-pressure line drain valve Y18 are closed, and the first anti-pressure hold-up manual valve J4 is manually opened to prevent residual medium in the low-pressure liquid oxygen storage tank O1 from evaporating and causing pressure buildup.

[0234] Liquid methane low-pressure system: The sixth control unit HK6 opens the fourth bypass drain valve K3 to vent the low-pressure liquid methane storage tank O4 and opens the engine low-pressure liquid methane line drain valve X18 to drain the low-pressure liquid methane main line x1. The drained medium is discharged through the complete engine low-pressure liquid methane line drain line x8, the gas generator low-pressure liquid methane line drain line x4, and the liquid methane low-pressure line exhaust line x6 into the liquid methane collection tank U1. When the exhaust gas is discharged to the liquid methane low-pressure tank pressure sensor FP and the complete engine low-pressure liquid methane line pressure sensor XP1 and displays values ​​within the acceptable range, the fourth bypass drain valve K3 and the engine low-pressure liquid methane line drain valve X18 are closed, and the fourth anti-pressure pressure manual valve K4 is manually opened to prevent residual medium in the low-pressure liquid methane storage tank O4 from evaporating and causing pressure buildup.

[0235] (4) Recover and reuse the emission media from the liquid oxygen emission collection system and the liquid methane emission collection system.

[0236] Liquid oxygen recovery in the liquid oxygen collection tank: The liquid oxygen collection tank discharge bypass valve S3 is closed, and the liquid oxygen collection tank air supply valve D5 is opened. Pressurized nitrogen is supplied to the liquid oxygen collection tank S1 via the fifth pressurized air supply line d5 from the first air distribution panel D1. When the pressure in the liquid oxygen collection tank S1 reaches the pressure sensor SP value, the liquid oxygen collection tank air supply valve D5 is closed. The first control device HK1 opens the liquid oxygen collection tank recovery valve S4 and the low-pressure liquid oxygen tank inlet valve P10 or the high-pressure liquid oxygen tank inlet valve P12. The liquid oxygen in the liquid oxygen collection tank S1 is compressed by the pressurization and recovered from the liquid oxygen collection tank recovery line s1 through the liquid oxygen collection tank recovery valve S4, the liquid oxygen recovery line filter S5, and the low-pressure liquid oxygen tank inlet valve P10 or the high-pressure liquid oxygen tank inlet valve P12, and then transported to the low-pressure liquid oxygen storage tank O1 or the high-pressure liquid oxygen storage tank O2. When the liquid oxygen collection tank level gauge SL shows no liquid level value, after recovery is completed, close the liquid oxygen collection tank recovery valve S4, the liquid oxygen low-pressure storage tank inlet valve P10 or the liquid oxygen high-pressure storage tank inlet valve P12, and then open the liquid oxygen collection tank discharge bypass valve S3 to prevent the residual medium in the liquid oxygen collection tank S1 from volatilizing and causing pressure buildup.

[0237] Recovery of liquid oxygen from the liquid methane collection tank: The liquid methane collection tank discharge bypass valve U3 is closed, and the liquid methane collection tank air supply valve D6 is opened. Pressurized nitrogen is supplied to the liquid methane collection tank U1 via the sixth pressurized air supply line d6 from the fourth air distribution panel D4. Once the pressure in the liquid methane collection tank U1 reaches the UP value, the liquid methane collection tank air supply valve D6 is closed. The second control device HK2 opens the liquid methane collection tank recovery valve U4, the low-pressure liquid methane tank inlet valve R10, or the high-pressure liquid methane tank inlet valve R12. The liquid methane in the liquid methane collection tank U1 is compressed by the pressurization and then recovered from the liquid methane collection tank recovery line u1 through the liquid methane collection tank recovery valve U4, the liquid methane recovery line filter U5, and the low-pressure liquid methane tank inlet valve R10 or the high-pressure liquid methane tank inlet valve R12, and transported to the low-pressure liquid methane storage tank O4 or the high-pressure liquid methane storage tank O3. When the liquid methane collection tank level gauge UL shows no liquid level value, after recovery is completed, close the liquid methane collection tank recovery valve U4, the liquid methane low-pressure storage tank inlet valve R10 or the liquid methane high-pressure storage tank inlet valve R12, and then open the liquid methane collection tank discharge bypass valve U3 to prevent the residual medium in the liquid methane collection tank U1 from volatilizing and causing pressure buildup.

[0238] 2. When testing a separate gas generator assembly of a liquid oxygen-methane high pressure system.

[0239] (1) First, pre-cool the medium in the liquid oxygen and methane high-pressure booster transmission system pipeline.

[0240] High-pressure liquid oxygen delivery module: The second safety discharge manual valve L1 remains normally open, and the fourth control device HK4 is used for automatic control pre-cooling. The liquid oxygen high-pressure circuit drain valve Y16 is closed. First, the high-pressure liquid oxygen tank outlet valve Y11 and the turbine pump liquid oxygen inlet valve Y15 are opened. The liquid oxygen medium is transported from the high-pressure liquid oxygen storage tank O2 through the high-pressure liquid oxygen main line y3 to the oxygen inlet of the separate gas generator Z2 at the engine assembly test station Z for pipeline medium pre-cooling. The liquid oxygen collection tank inlet valve Y19 is normally open, and then the liquid oxygen high-pressure circuit exhaust valve Y17 is opened to pre-cool and discharge the gas generated by the gasification heat exchange when the high-pressure liquid oxygen main line y3 pipeline starts pre-cooling. The exhaust gas is transported to S1 through the liquid oxygen high-pressure circuit exhaust line y7 and the liquid oxygen low-pressure circuit exhaust line y6. When the liquid oxygen high-pressure circuit temperature sensor YT2 shows that the temperature value of the oxygen inlet is 91K~94K, the medium pre-cooling of the high-pressure liquid oxygen main line y3 pipeline basically meets the requirements, and the liquid oxygen high-pressure circuit exhaust valve Y17 is closed to stop exhaust.

[0241] High-pressure liquid methane delivery module: The third safety discharge manual valve N1 remains normally open, and the fifth control device HK5 is used for automatic control pre-cooling. The liquid methane high-pressure circuit drain valve X16 is closed. First, the high-pressure liquid methane tank outlet valve X11 and the turbine pump liquid methane inlet valve X15 are opened. The liquid methane medium is transported from the high-pressure liquid methane storage tank O3 through the high-pressure liquid methane main line x3 to the methane inlet of the individual gas generator assembly at the Z station for pipeline medium pre-cooling. The liquid methane collection tank inlet valve X19 is normally open, and then the liquid oxygen high-pressure circuit exhaust valve X17 is opened to pre-cool and discharge the gas generated by the gasification heat exchange when the high-pressure liquid methane main line x3 pipeline starts pre-cooling. The exhaust gas is transported to the liquid methane collection tank U1 through the liquid methane high-pressure circuit exhaust pipeline x7 and the liquid methane low-pressure circuit exhaust pipeline x6. When the liquid methane high-pressure circuit temperature sensor XT2 shows that the temperature of the methane inlet is 111K~114K, the medium pre-cooling of the low-pressure liquid methane main circuit x1 basically meets the requirements, and the liquid oxygen high-pressure circuit exhaust valve X17 is closed to stop exhaust.

[0242] (2) Then, the nitrogen in the liquid oxygen and methane high pressure system tank is pressurized.

[0243] High-pressure liquid oxygen storage tank: Keep the liquid oxygen high-pressure boost manual valve G6 normally open, close the second bypass discharge valve L3, open the air supply valve in the second gas distribution board D2 to deliver the pressurized nitrogen to the second liquid oxygen main boost solenoid valve G1 and the second liquid oxygen auxiliary boost solenoid valve G2, use the fourth control device HK4 to automatically control the boosting, open the second liquid oxygen main boost solenoid valve G1, and the pressurized nitrogen after distribution passes through the second gas distribution board D2 to the high-pressure liquid oxygen storage tank O2 for rapid nitrogen boosting with a large flow rate. When the liquid oxygen high-pressure tank pressure sensor GP reaches the stable pressure value required by the test, maintain the stable pressure state.

[0244] High-pressure liquid methane storage tank: Keep the liquid methane high-pressure boost manual valve H6 normally open, close the third bypass discharge valve N3, open the air supply valve in the third gas distribution board D3 to deliver the pressurized nitrogen to the third liquid methane main boost solenoid valve H1 and the third liquid methane auxiliary boost solenoid valve H2, use the fifth control device HK5 to automatically control the boosting, open the third liquid methane main boost solenoid valve H1, and the pressurized nitrogen after gas distribution is delivered from the third gas distribution board D3 through the third boost air supply pipeline d3 and the liquid methane high-pressure main boost pipeline h1 to the high-pressure liquid methane storage tank O3 for large-flow rapid nitrogen boosting. When the liquid methane high-pressure tank pressure sensor HP reaches the stable pressure value required by the test, maintain the stable pressure.

[0245] (3) Finally, an ignition test is conducted in which the liquid oxygen and methane high-pressure system medium is pressurized and transported to a separate gas generator assembly.

[0246] When the nitrogen boost pressure in high-pressure liquid methane tank O3 reaches the set value, the automatic sequence for the individual gas generator assembly ignition test is initiated. Liquid oxygen and liquid methane are delivered through booster extrusion, simultaneously via line y3 and the high-pressure liquid methane main line x3 to the individual gas generator assembly for ignition test. During the ignition test, the liquid levels in high-pressure liquid oxygen tank O2 and high-pressure liquid methane tank O3 are monitored.

[0247] During the ignition test, if the test operating conditions need to be changed and the nitrogen boost pressure needs to be rapidly increased, and if the boost pressure of the liquid oxygen high-pressure main booster line g1 cannot meet the boosting capacity, the second liquid oxygen auxiliary booster solenoid valve G2 is opened, and the liquid oxygen high-pressure main booster line g1 and the liquid oxygen high-pressure auxiliary booster line g2 are used for simultaneous boosting. If the boost pressure of the liquid methane high-pressure main booster line h1 cannot meet the boosting capacity, the third liquid methane auxiliary booster solenoid valve H2 is opened, and the liquid methane high-pressure main booster line h1 and the liquid methane high-pressure auxiliary booster line h2 are used for simultaneous boosting.

[0248] Upon completion of the individual gas generator assembly ignition test, the fourth control unit HK4 of the liquid oxygen high-pressure system opens the second bypass drain valve L3 to vent the high-pressure liquid oxygen storage tank O2 and opens the liquid oxygen high-pressure line drain valve Y16 to drain the high-pressure liquid oxygen main line y3. The drained medium is discharged into the liquid oxygen collection tank S1 via the liquid oxygen high-pressure line drain line y5, the gas generator liquid oxygen low-pressure line drain line y4, and the liquid oxygen low-pressure line exhaust line y6. When the exhaust and liquid discharge to the liquid oxygen high-pressure tank pressure sensor GP and the liquid oxygen high-pressure line pressure sensor YP2 indicates values ​​within a reasonable range, the second bypass drain valve L3 and liquid oxygen high-pressure line drain valve Y16 are closed, and the second anti-pressure hold-up manual valve L4 is manually opened to prevent the volatilization of residual medium in the high-pressure liquid oxygen storage tank O2 and the resulting pressure build-up. Liquid methane high-pressure system: The fifth control device HK5 opens the third bypass drain valve N3 to vent the high-pressure liquid methane storage tank O3 and opens the liquid methane high-pressure line drain valve X16 to drain the high-pressure liquid methane main line x3. The drained medium is discharged into the liquid methane collection tank U1 via the liquid methane high-pressure line drain line x5, the gas generator liquid methane low-pressure line drain line x4, and the liquid methane low-pressure line exhaust line x6. When the exhaust and discharge to the liquid methane high-pressure tank pressure sensor HP and the liquid methane high-pressure line pressure sensor XP2 indicate values ​​within the acceptable range, the third bypass drain valve N3 and the liquid methane high-pressure line drain valve X16 are closed, and the third anti-pressure build-up manual valve N4 is manually opened to prevent residual medium in the high-pressure liquid methane storage tank O3 from evaporating and causing pressure build-up.

[0249] (4) Recover and reuse the emission media from the liquid oxygen emission collection system and the liquid methane emission collection system.

[0250] Liquid oxygen recovery in the liquid oxygen collection tank: Close the liquid oxygen collection tank discharge bypass valve S3, open the liquid oxygen collection tank air supply valve D5, and supply pressurized nitrogen to the liquid oxygen collection tank S1 via the fifth pressurized air supply line d5 from the first air distribution panel D1. When the liquid oxygen collection tank S1 is pressurized to the set value, the liquid oxygen collection tank air supply valve D5 is closed. The first control device HK1 opens the liquid oxygen collection tank recovery valve S4 and the low-pressure liquid oxygen storage tank inlet valve P10 or the high-pressure liquid oxygen storage tank inlet valve P12. The liquid oxygen in the liquid oxygen collection tank S1 is compressed by the pressurization and then recovered and transported to the low-pressure liquid oxygen storage tank O1 or the high-pressure liquid oxygen storage tank O2 via the liquid oxygen collection tank recovery line s1. When the liquid oxygen collection tank level gauge SL shows no liquid level value, after recovery is completed, close the liquid oxygen collection tank recovery valve S4, the liquid oxygen low-pressure storage tank inlet valve P10 or the liquid oxygen high-pressure storage tank inlet valve P12, and then open the liquid oxygen collection tank discharge bypass valve S3 to prevent the residual medium in the liquid oxygen collection tank S1 from volatilizing and causing pressure buildup.

[0251] Recovery of liquid oxygen from the liquid methane collection tank: The liquid methane collection tank discharge bypass valve U3 is closed, and the liquid methane collection tank air supply valve D6 is opened. Pressurized nitrogen is supplied to the liquid methane collection tank U1 from the fourth gas distribution panel D4 via the sixth pressurized air supply line d6. Once the pressure in the liquid methane collection tank U1 reaches the set value, the liquid methane collection tank air supply valve D6 is closed. The second control device HK2 opens the liquid methane collection tank recovery valve U4, the low-pressure liquid methane storage tank inlet valve R10, or the high-pressure liquid methane storage tank inlet valve R12. The liquid methane in the liquid methane collection tank U1 is compressed by the pressurization and then recovered and transported from the liquid methane collection tank recovery line u1 to the low-pressure liquid methane storage tank O4 or the high-pressure liquid methane storage tank O3. When the liquid methane collection tank level gauge UL shows no liquid level value, after recovery is completed, close the liquid methane collection tank recovery valve U4, the liquid methane low-pressure storage tank inlet valve R10 or the liquid methane high-pressure storage tank inlet valve R12, and then open the liquid methane collection tank discharge bypass valve U3 to prevent the residual medium in the liquid methane collection tank U1 from volatilizing and causing pressure buildup.

[0252] 3. When testing the turbine pump and gas generator components of the liquid oxygen and methane high and low systems.

[0253] (1) First, pre-cool the medium of the booster transmission system pipeline of the liquid oxygen and methane high and low systems.

[0254] High-pressure liquid oxygen delivery module: The second safety discharge manual valve L1 remains normally open, and pre-cooling is automatically controlled by the fourth control device HK4. The liquid oxygen high-pressure line drain valve Y16 is closed. First, the high-pressure liquid oxygen tank outlet valve Y11 and the turbo pump liquid oxygen inlet valve Y15 are opened. Liquid oxygen is transferred from the high-pressure liquid oxygen storage tank O2 via the high-pressure liquid oxygen main line Y3 to the oxygen inlet of the turbo pump Z1 for pipeline pre-cooling. The liquid oxygen collection tank inlet valve Y19 is normally open. Then, the liquid oxygen high-pressure line exhaust valve Y17 is opened to pre-cool and release the gas generated by the vaporization heat exchange during the initial pre-cooling of the high-pressure liquid oxygen main line Y3. The exhaust gas is then transferred to the liquid oxygen collection tank S1 via the liquid oxygen high-pressure line exhaust line Y7 and the liquid oxygen low-pressure line exhaust line Y6. When the liquid oxygen high-pressure line temperature sensor YT2 indicates an oxygen inlet temperature of 91K to 94K, pre-cooling of the liquid oxygen main line Y3 is basically satisfactory, and the liquid oxygen high-pressure line exhaust valve Y17 is closed to stop exhaust.

[0255] Low-pressure liquid oxygen delivery module: The first safety discharge manual valve J1 remains normally open, and pre-cooling is automatically controlled by the third control device HK3. The engine's low-pressure liquid oxygen shut-off valve Y3 is closed. First, the low-pressure liquid oxygen storage tank outlet valve Y1 and the gas generator low-pressure liquid oxygen shut-off valve Y6 are opened. Liquid oxygen is transported from O1 through the low-pressure liquid oxygen main line y1 and the low-pressure liquid oxygen branch line y2 to the oxygen inlet of the gas generator Z2 for pipeline pre-cooling. The liquid oxygen collection tank inlet valve Y19 is normally open. Then, the low-pressure liquid oxygen line exhaust valve Y10 is opened to pre-cool and release the gas generated by the vaporization heat exchange in the low-pressure liquid oxygen main line y1 and the low-pressure liquid oxygen branch line y2 during the initial pre-cooling process. The exhaust gas is transported to the liquid oxygen collection tank S1 via the low-pressure liquid oxygen line exhaust line y6. When the gas generator liquid oxygen low-pressure circuit temperature sensor YT3 shows that the temperature value of the oxygen inlet is 91K~94K, the medium pre-cooling of the low-pressure liquid oxygen main line y1 and the low-pressure liquid oxygen branch line y2 basically meets the requirements, and the liquid oxygen low-pressure circuit exhaust valve Y10 is closed to stop exhaust.

[0256] High-pressure liquid methane transmission module: The third safety discharge manual valve N1 remains normally open, and the fifth control device HK5 is used for automatic control precooling. The liquid methane high-pressure circuit drain valve X16 is closed. First, the high-pressure liquid methane tank outlet valve X11 and the turbine pump liquid methane inlet valve X15 are opened. The liquid methane medium is transported from the high-pressure liquid methane storage tank O3 to the methane inlet of the turbine pump Z1 through the high-pressure liquid methane main line x3 for pipeline medium precooling. The liquid methane collection tank inlet valve X19 is normally open, and then the liquid methane high-pressure circuit exhaust valve X17 is opened to precool and discharge the gas generated by the gasification heat exchange when the high-pressure liquid methane main line x3 pipeline starts precooling. The exhaust gas is transported to the liquid methane collection tank U1 through the liquid methane high-pressure circuit exhaust line x7 and the liquid methane low-pressure circuit exhaust line x6. When the liquid methane high-pressure circuit temperature sensor XT2 shows that the temperature of the methane inlet is 111K~114K, the medium pre-cooling of the low-pressure liquid methane main circuit x1 basically meets the requirements, and the liquid oxygen high-pressure circuit exhaust valve X17 is closed to stop exhaust.

[0257] Low-pressure liquid methane delivery module: The fourth safety release manual valve K1 remains normally open, and automatic pre-cooling is controlled by the sixth control device HK6. The engine's low-pressure liquid methane shut-off valve X3 is closed. First, the low-pressure liquid methane storage tank outlet valve X1 and the gas generator's low-pressure liquid methane shut-off valve X6 are opened. Liquid methane is delivered from the low-pressure liquid methane storage tank O4 via the low-pressure liquid methane main line x1 and the low-pressure liquid methane branch line x2 to the methane inlet of the gas generator Z2 for pipeline pre-cooling. The liquid methane collection tank inlet valve X19 is normally open. Then, the low-pressure liquid methane line exhaust valve X10 is opened to pre-cool and release the gas generated by the gasification heat exchange in the low-pressure liquid methane main line x1 and the low-pressure liquid methane branch line x2 during pre-cooling. The exhaust gas is delivered via valve x6 to the liquid methane collection tank U1. When the gas generator liquid methane low-pressure line temperature sensor XT3 shows that the temperature value of the methane inlet is 111K~114K, the medium pre-cooling of the low-pressure liquid methane main line x1 and the low-pressure liquid methane branch line x2 basically meets the requirements, and the liquid methane low-pressure line exhaust valve X10 is closed to stop exhaust.

[0258] (2) Then, the nitrogen in the liquid oxygen and methane high and low pressure system tanks is pressurized.

[0259] High-pressure liquid oxygen storage tank: Keep the liquid oxygen high-pressure boost manual valve G6 normally open, close the second bypass discharge valve L3, open the air supply valve in the second gas distribution board D2 to deliver the pressurized nitrogen to the second liquid oxygen main boost solenoid valve G1 and the second liquid oxygen auxiliary boost solenoid valve G2, use the fourth control device HK4 to automatically control the boosting, open the second liquid oxygen main boost solenoid valve G1, and the pressurized nitrogen after distribution passes through the second gas distribution board D2 to the high-pressure liquid oxygen storage tank O2 for rapid nitrogen boosting with a large flow rate. When the liquid oxygen high-pressure tank pressure sensor GP reaches the stable pressure value required by the test, maintain the stable pressure state.

[0260] Low-pressure liquid oxygen storage tank: Keep the low-pressure liquid oxygen boost manual valve E6 open, close the low-pressure liquid oxygen anti-pressure congestion line J3, and open the air supply valve in the first air distribution panel D1 to deliver pressurized nitrogen gas to the front of the first liquid oxygen main boost solenoid valve E1 and the first liquid oxygen auxiliary boost solenoid valve E2. The third control device HK3 automatically controls the boost pressure, opens the first liquid oxygen main boost solenoid valve E1, and the distributed pressurized nitrogen gas flows from the first air distribution panel D1 through the first boost air supply line d1 and the low-pressure liquid oxygen main boost line e1 to the low-pressure liquid oxygen storage tank O1 for rapid nitrogen boosting at a high flow rate. Once the low-pressure liquid oxygen tank pressure sensor EP reaches the stable pressure value required for the test, the pressure is maintained at a stable state.

[0261] High-pressure liquid methane storage tank: Keep the liquid methane high-pressure boost manual valve H6 normally open, close the third bypass discharge valve N3, open the air supply valve in the third gas distribution board D3 to deliver the pressurized nitrogen to the third liquid methane main boost solenoid valve H1 and the third liquid methane auxiliary boost solenoid valve H2, use the fifth control device HK5 to automatically control the boosting, open the third liquid methane main boost solenoid valve H1, and the pressurized nitrogen after gas distribution is delivered from the third gas distribution board D3 through the third boost air supply pipeline d3 and the liquid methane high-pressure main boost pipeline h1 to the high-pressure liquid methane storage tank O3 for large-flow rapid nitrogen boosting. When the liquid methane high-pressure tank pressure sensor HP reaches the stable pressure value required by the test, maintain the stable pressure.

[0262] Low-pressure liquid methane storage tank: Keep the tank's low-pressure boost manual valve F6 open, close the fourth bypass drain valve K3, and open the air supply valve in the fourth air distribution panel D4 to deliver pressurized nitrogen gas to the fourth liquid methane main boost solenoid valve F1 and the fourth liquid methane auxiliary boost solenoid valve F2. The sixth control device HK6 automatically controls the boost pressure, opening the fourth liquid methane main boost solenoid valve F1. The distributed pressurized nitrogen flows from the fourth air distribution panel D4 through the fourth boost air supply line d4 and the liquid methane low-pressure main boost line f1 to the low-pressure liquid methane storage tank O4 for rapid, high-flow nitrogen boost. Once the liquid methane low-pressure tank pressure sensor FP reaches the stable pressure value required for the test, the pressure is maintained steady.

[0263] (3) Finally, an ignition test is conducted to pressurize the liquid oxygen and methane high and low pressure system media and transport them to the turbine pump and gas generator components.

[0264] When the nitrogen boost pressure in the liquid oxygen and methane high- and low-pressure modules' tanks reaches the test setpoints, the automatic sequence for the turbine pump and gas generator assembly ignition test is initiated. Liquid oxygen and liquid methane are then pumped through the low-pressure liquid oxygen branch line y2, the high-pressure liquid oxygen main line y, and the low-pressure liquid methane branch line x2 and high-pressure liquid methane main line x3, respectively, to the turbine pump and gas generator assembly for ignition test. During the ignition test, the liquid levels of the low-pressure liquid oxygen tank level gauges OL1, OL2, OL3, and OL4 are simultaneously monitored in the high-pressure liquid oxygen tank O1, the high-pressure liquid methane tank O2, the high-pressure liquid methane tank O3, and the low-pressure liquid methane tank O4.

[0265] During the ignition test, if the test operating conditions need to be changed and the nitrogen boost pressure needs to be rapidly increased, and if the boost pressure in the liquid oxygen high-pressure tank g1 fails to meet the boosting capacity, the second liquid oxygen auxiliary booster solenoid valve G2 is opened, and the liquid oxygen high-pressure main booster pipe g1 and the liquid oxygen high-pressure auxiliary booster pipe g2 are used for simultaneous boosting. If the boost pressure in the liquid oxygen low-pressure main booster pipe e1 fails to meet the boosting capacity, the first liquid oxygen auxiliary booster solenoid valve E2 is opened, and the liquid oxygen low-pressure main booster pipe e1 and the liquid oxygen low-pressure auxiliary booster pipe e2 are used for simultaneous boosting. If the boost pressure in the liquid methane high-pressure main booster pipe h1 fails to meet the boosting capacity, the third liquid methane auxiliary booster solenoid valve H2 is opened, and the liquid methane high-pressure main booster pipe h1 and the liquid methane high-pressure auxiliary booster pipe h2 are used for simultaneous boosting. When the boost pressure of the liquid methane low-pressure main boost pipe f1 cannot meet the boost capacity, the fourth liquid methane auxiliary boost solenoid valve F2 is opened, and the liquid methane low-pressure main boost pipe f1 and the liquid methane low-pressure auxiliary boost pipe f2 are used for simultaneous boosting.

[0266] Upon completion of the turbopump and gas generator assembly ignition test, the fourth control unit HK4 of the liquid oxygen high-pressure system opens the second bypass drain valve L3 to vent the high-pressure liquid oxygen storage tank O2 and opens the liquid oxygen high-pressure line drain valve Y16 to drain the high-pressure liquid oxygen main line y3. The drained medium is discharged into the liquid oxygen collection tank S1 via the liquid oxygen high-pressure line drain line y5, the gas generator liquid oxygen low-pressure line drain line y4, and the liquid oxygen low-pressure line exhaust line y6. When the exhaust and liquid discharge to the liquid oxygen high-pressure tank pressure sensor GP and the liquid oxygen high-pressure line pressure sensor YP2 indicates values ​​within a reasonable range, the second bypass drain valve L3 and liquid oxygen high-pressure line drain valve Y16 are closed, and the second anti-pressure hold-up manual valve L4 is manually opened to prevent the evaporation of residual medium in the high-pressure liquid oxygen storage tank O2 and the resulting pressure build-up. Liquid oxygen low-pressure system: The third control device HK3 opens the low-pressure liquid oxygen anti-pressure back-up line J3 to vent the low-pressure liquid oxygen storage tank O1 and opens the gas generator low-pressure liquid oxygen line drain valve Y9 to drain the low-pressure liquid oxygen branch line y2. The discharged medium is discharged into the liquid oxygen collection tank S1 through the gas generator low-pressure liquid oxygen line drain line y4 and the low-pressure liquid oxygen line exhaust line y6. When the exhaust and liquid are discharged to the liquid oxygen low-pressure storage tank pressure sensor EP and the gas generator low-pressure liquid oxygen line pressure sensor YP3 and display values ​​within the reasonable range, the first bypass drain valve J3 and the gas generator low-pressure liquid oxygen line drain valve Y9 are closed, and the first anti-pressure back-up manual valve J4 is manually opened to prevent the residual medium in the low-pressure liquid oxygen storage tank O1 from evaporating and causing pressure back-up.

[0267] Liquid methane high-pressure system: The fifth control device HK5 opens the third bypass drain valve N3 to vent the high-pressure liquid methane storage tank O3 and opens the liquid methane high-pressure line drain valve X16 to drain the high-pressure liquid methane main line x3. The drained medium is discharged into the liquid methane collection tank U1 via the liquid methane high-pressure line drain line x5, the gas generator liquid methane low-pressure line drain line x4, and the liquid methane low-pressure line exhaust line x6. When the exhaust and liquid are discharged to the liquid methane high-pressure tank pressure sensor HP and the liquid methane high-pressure line pressure sensor XP2, the third bypass drain valve N3 and the liquid methane high-pressure line drain valve X16 are closed and manually opened. Liquid methane low-pressure system: The sixth control device HK6 opens the fourth bypass drain valve K3 to vent the low-pressure liquid methane storage tank O4 and opens the gas generator low-pressure liquid methane line drain valve X9 to drain the low-pressure liquid methane branch line x2. The drained medium is discharged through the gas generator low-pressure liquid methane line drain line x4 and the liquid methane low-pressure line exhaust line x6 to the liquid methane collection tank U1. When the exhaust and discharge pressure sensors FP and XP3 indicate values ​​within the acceptable range, the fourth bypass drain valve K3 and the gas generator low-pressure liquid methane line drain valve X9 are closed, and the fourth anti-pressure pressure manual valve K4 is manually opened to prevent residual medium in the low-pressure liquid methane storage tank O4 from evaporating and causing pressure buildup.

[0268] (4) Recover and reuse the emission media from the liquid oxygen emission collection system and the liquid methane emission collection system.

[0269] Liquid oxygen recovery in the liquid oxygen collection tank: The liquid oxygen collection tank discharge bypass valve S3 is closed, and the liquid oxygen collection tank air supply valve D5 is opened. Pressurized nitrogen is supplied to the liquid oxygen collection tank S1 via the fifth pressurized air supply line d5 from the first air distribution panel D1. When the liquid oxygen collection tank S1 reaches the pressure sensor SP value, the liquid oxygen collection tank air supply valve D5 is closed. The first control device HK1 opens the liquid oxygen collection tank recovery valve S4 and the low-pressure liquid oxygen storage tank inlet valve P10 or the high-pressure liquid oxygen storage tank inlet valve P12. The liquid oxygen in the liquid oxygen collection tank S1 is compressed by the pressurization and then recovered and transported to the low-pressure liquid oxygen storage tank O1 and the high-pressure liquid oxygen storage tank O2 via the liquid oxygen collection tank recovery line s1. When the liquid oxygen collection tank level gauge SL shows no liquid level value, after recovery is completed, close the liquid oxygen collection tank recovery valve S4, the liquid oxygen low-pressure storage tank inlet valve P10 or the liquid oxygen high-pressure storage tank inlet valve P12, and then open the liquid oxygen collection tank discharge bypass valve S3 to prevent the residual medium in the liquid oxygen collection tank S1 from volatilizing and causing pressure buildup.

[0270] Recovery of liquid oxygen from the liquid methane collection tank: The liquid methane collection tank discharge bypass valve U3 is closed, and the liquid methane collection tank air supply valve D6 is opened. Pressurized nitrogen is supplied to the liquid methane collection tank U1 from the fourth gas distribution panel D4 via the sixth pressurized air supply line d6. Once the pressure in the liquid methane collection tank U1 reaches the set value, the liquid methane collection tank air supply valve D6 is closed. The second control device HK2 opens the liquid methane collection tank recovery valve U4, the low-pressure liquid methane storage tank inlet valve R10, or the high-pressure liquid methane storage tank inlet valve R12. The liquid methane in the liquid methane collection tank U1 is compressed by the pressurization and then recovered and transported from the liquid methane collection tank recovery line u1 to the low-pressure liquid methane storage tank O4 or the high-pressure liquid methane storage tank O3. When the liquid methane collection tank level gauge UL shows no liquid level value, after recovery is completed, close the liquid methane collection tank recovery valve U4, the liquid methane low-pressure storage tank inlet valve R10 or the liquid methane high-pressure storage tank inlet valve R12, and then open the liquid methane collection tank discharge bypass valve U3 to prevent the residual medium in the liquid methane collection tank U1 from volatilizing and causing pressure buildup.

[0271] The above description is merely an illustrative embodiment of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A liquid oxygen-methane engine test bench multifunctional test system, characterized in that: The multifunctional test system includes: air circuit system, liquid circuit system, test station and control module, among which, The gas circuit system and the liquid circuit system are connected through pipelines to supply gas, the liquid circuit system is connected to the test station to provide the liquid fuel required for testing for the test station, and the control module is connected to control the operation of the gas circuit system and the liquid circuit system; The gas circuit system comprises: a first liquid nitrogen storage module (A), a second liquid nitrogen storage module (B), a gas production module (C) and a gas distribution module (D), wherein the first liquid nitrogen storage module (A) is connected to the gas production module (C) through a pipeline for gas production, and the gas production module (C) is connected to the gas distribution module (D) through a pipeline for gas distribution for the liquid circuit system; The liquid circuit system includes: a liquid oxygen storage module (P), a liquid methane storage module (R), a liquid oxygen subcooling module (W), a liquid methane subcooling module (V), a liquid oxygen delivery module (Y) and a liquid methane delivery module (X), wherein the first liquid nitrogen storage module (A) is connected to the liquid oxygen subcooling module (W) through a pipeline to provide a subcoolant, the liquid oxygen storage module (P) is connected to the liquid oxygen subcooling module (W) through a pipeline to subcool the liquid oxygen, and the liquid oxygen storage module (P) and the liquid oxygen subcooling module (W) are both connected to the liquid oxygen delivery module (Y) through a pipeline to provide liquid oxygen for commissioning; The second liquid nitrogen storage module (B) is connected to the liquid methane supercooling module (V) through a pipeline to provide a supercoolant, and the liquid methane storage module (R) is connected to the liquid methane supercooling module (V) through a pipeline to supercool the liquid methane. The liquid methane storage module (R) and the liquid methane supercooling module (V) are both connected to the liquid methane delivery module (X) through a pipeline to provide liquid methane for trial operation; The test station includes: an engine vehicle test station (M) and an engine assembly test station (Z), wherein the engine vehicle test station (M) is connected to the liquid oxygen delivery module (Y) and the liquid methane delivery module (X) for performing a low-pressure test; The engine assembly test station (Z) is connected to the liquid oxygen delivery module (Y) and the liquid methane delivery module (X) and is used to perform high-pressure test and high-low pressure test.

2. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 1, characterized in that: The liquid circuit system further comprises: a liquid oxygen recovery module (S) and a liquid methane recovery module (U), wherein the liquid oxygen recovery module (S) is connected to the liquid oxygen delivery module (Y) via a pipeline, and is used to recover the liquid oxygen and its vaporized gas in the pipeline; The liquid methane recovery module (U) is connected to the liquid methane delivery module (X) through a pipeline, and is used to recover the liquid methane and its gasified gas in the pipeline; The liquid oxygen recovery module (S) transports the liquid oxygen recovered therein to the liquid oxygen storage module (P) or the liquid oxygen storage tank of the liquid oxygen delivery module (Y) through a pipeline by pressurizing; The liquid methane recovery module (U) transports the liquid methane recovered therein to the liquid methane storage module (R) or the liquid methane storage tank of the liquid methane delivery module (X) through a pipeline by pressurizing.

3. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 2, characterized in that: The liquid oxygen delivery module (Y) includes a low-pressure liquid oxygen delivery module and a high-pressure liquid oxygen delivery module, wherein: The low-pressure liquid oxygen delivery module comprises a low-pressure liquid oxygen storage tank (O1), a low-pressure liquid oxygen main line (y1) and a low-pressure liquid oxygen branch line (y2), and is used to deliver low-pressure liquid oxygen for testing to the engine vehicle testing station (M) and the engine assembly testing station (Z); The liquid oxygen supercooled in the liquid oxygen supercooler (W1) of the liquid oxygen supercooling module (W) is transported to the low-pressure liquid oxygen storage tank (O1) through the liquid oxygen supercooler liquid outlet pipeline (w2) and the low-pressure liquid oxygen storage tank filling pipeline (p3); The upper portion of the low-pressure liquid oxygen storage tank (O1) is connected to the gas distribution module (D) through the first boosting module (E) for gas distribution and pressurization, and is depressurized through the first discharge module (J); The high-pressure liquid oxygen delivery module comprises a high-pressure liquid oxygen storage tank (O2) and a high-pressure liquid oxygen main line (y3), and is used to deliver high-pressure liquid oxygen for testing to the engine assembly testing station (Z); The liquid oxygen supercooled in the liquid oxygen supercooler (W1) of the liquid oxygen supercooling module (W) is transported to the high-pressure liquid oxygen storage tank (O2) through the liquid oxygen supercooler liquid outlet pipeline (w2) and the high-pressure liquid oxygen storage tank filling pipeline (p4); The upper portion of the high-pressure liquid oxygen storage tank (O2) is connected to the gas distribution module (D) through the second boosting module (G) for gas distribution and pressurization, and is depressurized through the second discharge module (L).

4. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 3, characterized in that: The low-pressure liquid oxygen main line (y1), the low-pressure liquid oxygen branch line (y2) and the high-pressure liquid oxygen main line (y3) are all connected to the liquid oxygen recovery module (S) through pipelines to recover liquid oxygen and gasified gas.

5. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 3, characterized in that: The liquid methane delivery module (X) includes a low-pressure liquid methane delivery module and a high-pressure liquid methane delivery module, wherein: The low-pressure liquid methane delivery module comprises a low-pressure liquid methane storage tank (O4), a low-pressure liquid methane main line (x1) and a low-pressure liquid methane branch line (x2), and is used to deliver low-pressure liquid methane for testing to the engine vehicle testing station (M) and the engine assembly testing station (Z); The liquid methane supercooled in the liquid methane supercooler (V1) of the liquid methane supercooling module (V) is transported to the low-pressure liquid methane storage tank (O4) through the liquid methane supercooler liquid outlet pipeline (v2) and the low-pressure liquid methane storage tank filling pipeline (r3); The upper portion of the low-pressure liquid methane storage tank (O4) is connected to the gas distribution module (D) through the fourth boosting module (F) for gas distribution and pressure boosting, and is depressurized through the fourth discharge module (K); The high-pressure liquid methane delivery module comprises a high-pressure liquid methane storage tank (O3) and a high-pressure liquid methane main line (x3), and is used to deliver high-pressure liquid methane for testing to the engine assembly testing station (Z); The liquid methane supercooled in the liquid methane supercooler (V1) of the liquid methane supercooling module (V) is transported to the high-pressure liquid methane storage tank (O3) through the liquid methane supercooler liquid outlet pipeline (v2) and the high-pressure liquid methane storage tank filling pipeline (r4); The upper portion of the high-pressure liquid methane storage tank (O3) is connected to the gas distribution module (D) through the third boosting module (H) for gas distribution and boosting, and is depressurized through the third discharge module (N).

6. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 5, characterized in that: The low-pressure liquid methane main line (x1), the low-pressure liquid methane branch line (x2) and the high-pressure liquid methane main line (x3) are all connected to the liquid methane recovery module (U) through pipelines to recover liquid methane and gasified gas.

7. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 5, characterized in that: The engine vehicle test station (M) is a complete engine (M1) for low-pressure test; The low-pressure liquid oxygen storage tank (O1) is connected to the liquid oxygen inlet of the complete engine (M1) through the low-pressure liquid oxygen main line (y1) to provide low-pressure liquid oxygen for test running; The low-pressure liquid methane storage tank (O4) is connected to the liquid methane inlet of the complete engine (M1) through the low-pressure liquid methane main line (x1) to provide low-pressure liquid methane for test running; The engine assembly test station (Z) comprises a turbine pump (Z1) and a gas generator (Z2); The low-pressure liquid oxygen storage tank (O1) is connected to the liquid oxygen inlet of the gas generator (Z2) through the low-pressure liquid oxygen main line (y1) and the low-pressure liquid oxygen branch line (y2) to provide low-pressure liquid oxygen for test operation; The high-pressure liquid oxygen storage tank (O2) is connected to the liquid oxygen inlet of the turbo pump (Z1) through the high-pressure liquid oxygen main line (y3) to provide high-pressure liquid oxygen for test operation; The low-pressure liquid methane storage tank (O4) is connected to the liquid methane inlet of the gas generator (Z2) through the low-pressure liquid methane main line (x1) and the low-pressure liquid methane branch line (x2) to provide low-pressure liquid methane for test operation; The high-pressure liquid methane storage tank (O3) is connected to the liquid methane inlet of the turbine pump (Z1) through the high-pressure liquid methane main line (x3) to provide high-pressure liquid methane for test operation.

8. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 5, characterized in that: The gas production module (C) includes: a liquid nitrogen storage tank (C1), a liquid nitrogen plunger pump (C2), a liquid nitrogen vaporizer (C3) and a high-pressure nitrogen cylinder group (C4), wherein: The liquid nitrogen in the first liquid nitrogen storage module (A) is added to the liquid nitrogen storage tank (C1) through the second liquid nitrogen filling pipeline (a5), and then pumped into the liquid nitrogen vaporizer (C3) by the liquid nitrogen plunger pump (C2) for gasification, and finally the gasified nitrogen is stored in the high-pressure nitrogen cylinder group (C4); The high-pressure nitrogen cylinder group (C4) is transported to the nitrogen distribution module (D) through the nitrogen delivery main line (c0).

9. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 8, characterized in that: The nitrogen gas distribution module (D) comprises a first gas distribution plate (D1), a second gas distribution plate (D2), a third gas distribution plate (D3) and a fourth gas distribution plate (D4) connected in parallel on the nitrogen gas delivery main line (c0), wherein: The first air distribution plate (D1) is connected to the first boosting module (E) via the first boosting air supply pipeline (d1) to perform boosting air supply; The second air distribution plate (D2) is connected to the second boosting module (G) via the second boosting air supply pipeline (d2) to perform boosting air supply; The third air distribution plate (D3) is connected to the third boosting module (H) via a third boosting air supply pipeline (d3) to perform boosting air supply; The fourth air distribution plate (D4) is connected to the fourth boosting module (F) via a fourth boosting air supply pipeline (d4) for boosting air supply.

10. The multifunctional test system for liquid oxygen-methane engine test bench according to claim 5, characterized in that: The first liquid nitrogen storage module (A) provides a subcoolant to the liquid oxygen subcooler (W1) through a first liquid nitrogen filling pipeline (a3), and the liquid oxygen storage module (P) transports liquid oxygen to the liquid oxygen subcooler (W1) through a liquid oxygen subcooler liquid inlet pipeline (w1) for subcooling. The second liquid nitrogen storage module (B) provides a subcoolant to the liquid methane subcooler (V1) through a third liquid nitrogen filling pipeline (b3), and the liquid methane storage module (R) transports liquid methane to the liquid methane subcooler (V1) through a liquid methane subcooler liquid inlet pipeline (v1) for subcooling of the liquid methane.

Images