Lightweight test device for liquid rocket engine valve flow resistance liquid flow test

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By designing a modular lightweight liquid rocket engine valve test device, the existing equipment is solved, the problem of bulkiness and non-versatility is achieved, the recycling of media and the adaptability of valves of different lengths is realized, the backpressure environment of the valve on the rocket is simulated, and the efficiency and accuracy of the test are improved.

CN119595274APending Publication Date: 2025-03-11BEIJING AEROSPACE PROPULSION INST

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Patent Information

Application Number: CN202411647356.4
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-11-18
Publication Date: 2025-03-11

AI Technical Summary

Technical Problem

The test device of existing liquid rocket engine valves is bulky and not versatile, and cannot simulate the actual environment in which the upper valve on the rocket works under back pressure, and cannot realize the recycling of the medium.

Method used

A lightweight test device is designed, adopting a modular design, integrating the process system and test station on the mobile car, connecting the process system and the test station through a metal hose to realize the recycling of the medium, and adapting to valves of different lengths through a slide rail design, equipped with a regulating valve to simulate the back pressure environment.

Benefits of technology

It realizes the lightweight and versatility of the test device, can adapt to the test of valves of different lengths of 80mm to 120mm, simulates the backpressure environment of the valve on the rocket, and realizes the recycling of the medium, improving the efficiency and accuracy of the test.

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Abstract

According to the lightweight test device for the liquid rocket engine valve flow resistance liquid flow test, a process system and a test station are integrated on a mobile trolley, and the process system and the test station system can move freely and are not limited by a test site; the process system is connected with the test station system through the metal hose, so that the use is convenient; a sliding rail type design scheme is adopted, the platform is moved back and forth through a sliding rail to meet the flow resistance test of valves with different lengths, and the universality is high; a pumping pressure type scheme is adopted for medium supply, the adjusting valve is arranged to adjust the back pressure of the product valve, and the actual situation that the product valve works in the environment with the back pressure on a rocket is closer to that of the product valve; a backflow scheme design is adopted, and a backflow pipeline is provided with a safety valve, so that the test system can be effectively protected.

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Description

Technical Field

[0001] The invention relates to a lightweight test device for a flow resistance liquid flow test of a liquid rocket engine valve, belonging to the technical field of liquid rocket engine testing. Background Art

[0002] Valves are key components of liquid rocket engines and play a key role in the supply of engine fuel. Traditional valve flow tests are mostly conducted by directly connecting the pipeline to the inlet and outlet of the valve through hard pipes. The test equipment is bulky and not universal. When the product size changes, the test equipment needs to be redesigned, and the test process is cumbersome. At present, most valves are tested for liquid flow through an extrusion system, which cannot achieve the recycling of the medium and cannot simulate the actual environment of the valve working under back pressure on the rocket. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and solve the problem that the test device is bulky and not universal when testing liquid rocket engine valve products.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A lightweight test device for a flow resistance test of a liquid rocket engine valve, comprising a process system and a test station;

[0006] The process system includes a base, a mobile roller, a medium container, a magnetic flap level gauge, a tank safety valve, an air inlet valve, an air inlet line filter a, a liquid inlet valve, a liquid inlet line filter b, an air release valve, a liquid release valve, a pressure sensor, a process pump, a reflux line safety valve, a reflux line regulating valve, a small flow line flow meter, a medium flow line flow meter, a high flow line flow meter, a small flow line regulating valve, a medium flow line regulating valve, a high flow line regulating valve, and a back pressure valve;

[0007] The process system is placed on its own base, and the bottom of the base is equipped with a movable roller; the medium container is used to store the test medium, and a magnetic flap level gauge is installed on the side; the top of the medium container is equipped with a tank safety valve; the medium container is also equipped with an air intake valve, an air intake pipeline filter a, and an air release valve. The air intake valve is connected to the air supply system, and the air release valve is connected to the outside atmosphere. The pressure in the medium container is maintained constant by opening and closing; the air intake pipeline filter a is used to filter impurities in the compressed air; the side of the medium container is equipped with a liquid intake valve and a liquid intake pipeline filter b. The liquid intake valve is opened to add the medium required for the test to the medium container; the bottom of the medium container is equipped with a liquid release valve; the top of the medium container is connected to a pressure sensor to detect the pressure in the medium container;

[0008] The medium in the medium container is transported to the workstation through the process pump; a reflux safety valve and a reflux regulating valve are provided downstream of the process pump, wherein the reflux regulating valve is used to adjust the size of the reflux volume, and the reflux safety valve is used to ensure the safety of the process pump;

[0009] Four flow pipelines are set up behind the process pump, namely, small flow medium supply pipeline, medium flow medium supply pipeline, high flow medium supply pipeline, and medium return pipeline; each medium supply pipeline is equipped with a corresponding pipeline flow meter and pipeline regulating valve; each medium supply pipeline flow meter is used to monitor the flow of the pipeline, and the regulating valve is used to adjust the flow, control the liquid flow and pressure, and simulate the fluid dynamic characteristics of each component; the medium return pipeline is equipped with a back pressure valve, and the back pressure of the product outlet is controlled by the opening of the back pressure valve;

[0010] The test station includes a test station base, a test station moving pulley, a test station filter support, a test station filter, a slide rail moving platform, a slide rail moving limit block, a slide rail rod, a slide rail locking nut, a differential pressure sensor, a test station inlet pipeline, a test station outlet pipeline, a test station pipeline support, a liquid inlet metal hose, and a reflux metal hose;

[0011] The test station is placed on its own test station base, and the bottom of the test station base is equipped with a test station moving pulley; a test station filter is provided at the entrance of the test station; the test station filter is fixed on the test station filter support through a flange connection; the bottom of the test station filter support is fixed on the slide rail moving platform; the slide rail moving platform can slide on the slide rail rod, and the slide rail moving limit block is used to limit the slide rail, and can be locked by the slide rail locking nut after moving to the specified position; by moving the position of the slide rail moving platform, products of different lengths can be used for testing; the external product valve is connected to the test station inlet pipeline and the test station outlet pipeline through the test fixture, and the flow resistance at both ends of the product valve inlet and outlet is measured by the differential pressure sensor;

[0012] The outlet pipeline of the test station is fixed on the pipeline support of the test station; according to different products, the process system is connected to the test station using a liquid inlet metal hose, and different pipelines of the process system are selected according to the product flow requirements; the test station is connected to the process system using a reflux metal hose, and the test medium passing through the product valve is refluxed to the medium container so that the test medium can be recycled.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The device of the present invention adopts a modular design concept, integrating the process system and the test station on a mobile trolley. The process system and the test station system can be freely moved without being restricted by the test site; the process system and the test station system are connected by a metal hose, which is convenient to use.

[0015] (2) The test station of the device of the present invention adopts a slide rail design, which moves the platform back and forth through the slide rail to meet the flow resistance test of valves of different lengths. It has strong versatility and can meet the needs of testing valves of different lengths of 80mm to 120mm.

[0016] (3) The process system of the device of the present invention adopts a pump pressure solution to supply the medium and is equipped with a regulating valve to adjust the back pressure of the product valve, which is closer to the actual situation of the product valve working in an environment with back pressure on the rocket.

[0017] (4) The process system of the device of the present invention adopts a reflux design, and the reflux pipeline is equipped with a safety valve, which can effectively protect the test system.

[0018] (5) The test device of the present invention is equipped with pipelines with small, medium and large flow rates, which can cover a flow rate range of 3 to 300 g / s. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the composition of the process system of the present invention.

[0020] Figure 2 It is a schematic diagram of the test station composition of the present invention.

[0021] Figure 3 It is a schematic diagram of the composition of the liquid flow test device of the present invention.

[0022] Figure numerals: 1-base, 2-moving roller, 3-medium container, 4-magnetic flap level gauge, 5-tank safety valve, 6-inlet valve, 7-inlet pipeline filter a, 8-liquid inlet valve, 9-liquid inlet pipeline filter b, 10-vent valve, 11-drain valve, 12-pressure sensor, 13-process pump, 14-return line safety valve, 15-return line regulating valve, 16-small flow pipeline flowmeter, 17-medium flow pipeline flowmeter, 18-high flow pipeline flowmeter, 19-small flow pipeline regulating valve, 20-medium flow 1-Measurement pipeline regulating valve, 21-High flow pipeline regulating valve, 22-Back pressure valve, 23-Test station base, 24-Test station moving pulley, 25-Test station filter support, 26-Test station filter, 27-Slide rail moving platform, 28-Slide rail moving limit block, 29-Slide rail rod, 30-Slide rail locking nut, 31-Differential pressure sensor, 32-Test station inlet pipeline, 33-Test station outlet pipeline, 34-Test station pipeline support, 35-Liquid inlet metal hose, 36-Return metal hose, 37-Product valve. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] A lightweight test device for a liquid rocket engine valve flow resistance test includes a process system and a test station. Figure 1 As shown, the test station is as follows Figure 2 As shown, the overall device is Figure 3 shown.

[0025] The process system includes a base 1, a moving roller 2, a medium container 3, a magnetic flap level gauge 4, a tank safety valve 5, an air inlet valve 6, an air inlet pipeline filter 7, a liquid inlet valve 8, a liquid inlet pipeline filter 9, an air release valve 10, a liquid release valve 11, a pressure sensor 12, a process pump 13, a reflux line safety valve 14, a reflux line regulating valve 15, a small flow line flow meter 16, a medium flow line flow meter 17, a high flow line flow meter 18, a small flow line regulating valve 19, a medium flow line regulating valve 20, a high flow line regulating valve 21, and a back pressure valve 22.

[0026] The test station includes a test station base 23, a test station moving pulley 24, a test station filter support 25, a test station filter 26, a slide rail moving platform 27, a slide rail moving limit block 28, a slide rail rod 29, a slide rail locking nut 30, a differential pressure sensor 31, a test station inlet pipeline 32, a test station outlet pipeline 33, a test station pipeline support 34, a liquid inlet metal hose 35, and a reflux metal hose 36.

[0027] The process system is placed on the base 1. The bottom of the base 1 is equipped with four movable rollers 2. The integrated process system can be moved. The process system is equipped with a medium container 3 with a pressure bearing capacity of 5MPa and a volume of 30L to store the test medium. A magnetic flap level gauge 4 is provided on the side of the medium container 3, which can display the liquid level in the medium container in real time. A 1MPa tank safety valve 5 is provided on the top of the medium container 3. When the system is overpressured, it automatically opens to discharge the pressure to ensure the safety of the medium container. The medium container 3 is also equipped with an intake valve 6, an intake pipeline filter a7 with an accuracy of 14μm, and a vent valve 10. The intake valve 6 is connected to the air supply system, and the vent valve 10 is connected to the outside atmosphere. The pressure in the medium container is maintained constant by opening and closing. The intake pipeline filter a7 is used to filter impurities in the compressed air. A liquid inlet valve 8 and a 14μm liquid inlet pipeline filter b9 are provided on the side of the medium container 3. The liquid inlet valve 8 is opened to add the medium required for the test into the medium container 3. A discharge valve 11 is provided at the bottom of the medium container 3 to discharge the medium stored in the medium container. A pressure sensor 12 is connected to the top of the medium container 3 to detect the pressure in the medium container.

[0028] The process system is equipped with a process pump 13 with a rated flow rate of 380g / s, through which the medium in the medium container 3 is transported to the workstation. The process system adopts a reflux solution design, and a reflux safety valve 14 with an opening pressure of 1MPa and a reflux regulating valve 15 are provided downstream of the process pump 13, wherein the reflux regulating valve 15 is used to adjust the size of the reflux volume, and the reflux safety valve 14 is used to ensure the safety of the process pump 13. When the pressure exceeds the rated value of 1MPa, the reflux safety valve 14 automatically opens to ensure the flow of the reflux.

[0029] Four flow pipelines are set after the process pump 13, namely, a small flow medium supply pipeline, a medium flow medium supply pipeline, a high flow medium supply pipeline, and a medium return pipeline. The small flow medium supply pipeline is equipped with a small flow pipeline flow meter 16 and a small flow pipeline regulating valve 19. The medium flow medium supply pipeline is equipped with a medium flow pipeline flow meter 17 and a medium flow pipeline regulating valve 20. The high flow medium supply pipeline is equipped with a high flow pipeline flow meter 18 and a high flow pipeline regulating valve 21. The flow meters of each medium supply pipeline are used to monitor the flow of the pipeline, and the regulating valve is used to adjust the flow, control the liquid flow and pressure, and simulate the fluid dynamic characteristics of each component. The medium return pipeline is equipped with a back pressure valve 22, and the back pressure of the product outlet is controlled by the opening of the back pressure valve 22.

[0030] The test station is placed on the test station base 23, and the bottom of the test station base 23 is equipped with 4 test station moving pulleys 24, so that the integrated test station can move freely. The entrance of the test station is provided with a test station filter 26 with a filtration accuracy of 14μm. The test station filter 26 is fixed to the test station filter support 25 through a flange connection. The bottom of the test station filter support 25 is fixed on the slide rail moving platform 27. The slide rail moving platform 27 can slide on the slide rail rod 29, and the slide rail moving limit block 28 can limit the slide rail. After moving to the specified position, it can be locked by the slide rail locking nut 30. By moving the position of the slide rail moving platform 27, the test can be carried out using products of different lengths. The product valve 37 is connected to the test station inlet pipeline 32 and the test station outlet pipeline 33 through the test fixture, and the flow resistance at both ends of the inlet and outlet of the product valve 37 is measured by the differential pressure sensor 31.

[0031] The test station outlet pipeline 33 is fixed on the test station pipeline support 34. According to different products, the process system and the test station can be connected using the liquid inlet metal hose 35. According to the product flow requirements, different pipelines of the process system can be selected. The test station is connected to the process system using the reflux metal hose 36, and the test medium passing through the product valve 37 is refluxed to the medium container 3, so that the test medium can be recycled.

[0032] The working process of the device of the present invention is:

[0033] a. Before the test begins, the liquid level of the medium container must be confirmed, the drain valve 11 must be closed, the air inlet valve 6 must be closed, the liquid inlet valve 8 must be opened, the air vent valve 10 must be opened, pure water must be added to the medium container 3 using a pure water preparation device, the medium must be filtered through the inlet line filter 9, and the magnetic flap level gauge 4 must be observed to ensure that the liquid level is not lower than 2 / 3.

[0034] b. After filling, close the air release valve 10 and the liquid inlet valve 8;

[0035] c. The translation stage 27 is moved by moving the slide rail to adapt the length of the product valve, and the product valve 37 is connected to the test station inlet pipeline 32 and the test station outlet pipeline 33;

[0036] d. Tighten the slide rail locking nut 30, fix the slide rail moving platform 27, and connect the differential pressure sensor 31 to the inlet and outlet of the product valve 37;

[0037] e. Move the mobile process system and the test station system to a suitable position through the mobile roller 2 of the process system and the mobile pulley 24 of the test station;

[0038] f. Select the process system with the appropriate pipeline according to the flow rate required by the product valve 37, and connect the process system to the test station using the liquid inlet metal hose 35;

[0039] g. Use the reflux metal hose 36 to connect the test station to the process system to circulate the medium;

[0040] h Before starting the process pump 13, it is necessary to check the reflux valve regulating valve 15 to ensure that the reflux regulating valve 15 is in an open state; check the back pressure valve 22 to ensure that the back pressure valve 22 is in an open state;

[0041] i Start the process pump 13, adjust the corresponding pipeline regulating valve (19 or 20 or 21) according to the selected flow pipeline, adjust the back pressure valve 22, so that the inlet pressure and flow of the product valve reach the required values, and record the test flow and the inlet pressure of the product valve;

[0042] After the test is completed, close the process pump 13, open the air release valve 10, and open the liquid release valve 11 to discharge the test medium;

[0043] k Remove the liquid inlet metal hose 35 and the return metal hose 36 to separate the process system and the test station;

[0044] l Remove the product valve 37, move the test station and process system to the designated location, and complete the test.

[0045] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0046] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A lightweight test device for liquid rocket engine valve flow resistance test, characterized in that: It includes two parts: process system and test station; The process system comprises a base (1), a movable roller (2), a medium container (3), a magnetic flap liquid level gauge (4), a storage tank safety valve (5), an air intake valve (6), an air intake pipeline filter a (7), a liquid intake valve (8), a liquid intake pipeline filter b (9), an air release valve (10), a liquid release valve (11), a pressure sensor (12), a process pump (13), a return line safety valve (14), a return line regulating valve (15), a small flow line flow meter (16), a medium flow line flow meter (17), a high flow line flow meter (18), a small flow line regulating valve (19), a medium flow line regulating valve (20), a high flow line regulating valve (21), and a back pressure valve (22); The process system is placed on its own base (1), and the bottom of the base (1) is provided with a movable roller (2); the medium container (3) is used to store the test medium, and a magnetic flap liquid level gauge (4) is provided on the side; the top of the medium container (3) is provided with a tank safety valve (5); the medium container (3) is also provided with an air intake valve (6), an air intake pipeline filter a (7), and an air release valve (10), the air intake valve (6) is connected to the air supply system, and the air release valve (10) is connected to the outside atmosphere, and the pressure in the medium container (3) is maintained constant by opening and closing; the air intake pipeline filter a (7) is used to filter impurities in the compressed air; the side of the medium container (3) is provided with a liquid intake valve (8) and a liquid intake pipeline filter b (9), and the liquid intake valve (8) is opened to add the medium required for the test into the medium container (3); the bottom of the medium container (3) is provided with a liquid release valve (11); the top of the medium container (3) is connected with a pressure sensor (12) for detecting the pressure in the medium container; The medium in the medium container (3) is transported to the workstation via a process pump (13); a return path safety valve (14) and a return path regulating valve (15) are provided downstream of the process pump (13), wherein the return path regulating valve (15) is used to adjust the size of the return flow, and the return path safety valve (14) is used to ensure the safety of the process pump (13); Four flow pipelines are arranged behind the process pump (13), namely a small flow medium supply pipeline, a medium flow medium supply pipeline, a high flow medium supply pipeline, and a medium return pipeline; Each medium supply pipeline is equipped with a corresponding pipeline flow meter and pipeline regulating valve; The flowmeter of each medium supply pipeline is used to monitor the flow of the pipeline, and the regulating valve is used to adjust the flow, control the flow and pressure of the liquid circuit, and simulate the fluid dynamic characteristics of each component; the medium return pipeline is equipped with a back pressure valve (22), and the back pressure of the product outlet is controlled by the opening of the back pressure valve (22); The test station comprises a test station base (23), a test station moving pulley (24), a test station filter support (25), a test station filter (26), a slide rail moving platform (27), a slide rail moving limit block (28), a slide rail rod (29), a slide rail locking nut (30), a differential pressure sensor (31), a test station inlet pipeline (32), a test station outlet pipeline (33), a test station pipeline support (34), a liquid inlet metal hose (35), and a return metal hose (36); The test station is placed on its own test station base (23), and the bottom of the test station base (23) is equipped with a test station moving pulley (24); the entrance of the test station is provided with a test station filter (26); the test station filter (26) is fixed on the test station filter support (25) through a flange connection; the bottom of the test station filter support (25) is fixed on the slide rail moving platform (27); the slide rail moving platform (27) can slide on the slide rail rod (29), and the slide rail moving limit block (28) is used to limit the slide rail, and can be locked by the slide rail locking nut (30) after moving to the specified position; by moving the position of the slide rail moving platform (27), the test can be carried out using products of different lengths; the external product valve (37) is connected to the test station inlet pipeline (32) and the test station outlet pipeline (33) through the test fixture, and the flow resistance at both ends of the inlet and outlet of the product valve (37) is measured by the differential pressure sensor (31); The test station outlet pipeline (33) is fixed on the test station pipeline support (34); the process system is connected to the test station using a liquid inlet metal hose (35) according to different products, and different pipelines of the process system are selected according to product flow requirements; the test station is connected to the process system using a reflux metal hose (36), and the test medium passing through the product valve (37) is refluxed into the medium container (3), so that the test medium can be circulated.

2. The lightweight test device according to claim 1, characterized in that: The magnetic flap liquid level gauge (4) is used to display the liquid level height in the medium container (3) in real time.

3. The lightweight test device according to claim 1, characterized in that: When the system is over-pressured, the tank safety valve (5) automatically opens to discharge the pressure, thereby ensuring the safety of the medium container (3).

4. The lightweight test device according to claim 1, characterized in that: The discharge valve (11) is used to discharge the stored medium in the medium container (3).

5. The lightweight test device according to claim 1, characterized in that: The small flow medium supply pipeline is equipped with a small flow pipeline flow meter (16) and a small flow pipeline regulating valve (19); the medium flow medium supply pipeline is equipped with a medium flow pipeline flow meter (17) and a medium flow pipeline regulating valve (20); and the high flow medium supply pipeline is equipped with a high flow pipeline flow meter (18) and a high flow pipeline regulating valve (21).

6. The lightweight test device according to claim 1, characterized in that: The pressure bearing capacity of the medium container (3) is not less than 5MPa, and the volume is not less than 30L.

7. The lightweight test device according to claim 1, characterized in that: The precision of the air inlet pipe filter a (7) and the liquid inlet pipe filter b (9) is not less than 14 μm.

8. The lightweight test device according to claim 1, characterized in that: The rated flow rate of the process pump (13) is not less than 380 g / s.

9. The lightweight test device according to claim 1, characterized in that: The opening pressure of the return line safety valve (14) does not exceed 1 MPa.

10. The lightweight test device according to any one of claims 1 to 9, characterized in that: The working process of the lightweight test device is as follows: a. Before the test begins, confirm the liquid level in the medium container, close the drain valve (11), close the air inlet valve (6), open the liquid inlet valve (8), open the air vent valve (10), use the pure water preparation device to add pure water to the medium container (3), filter the medium through the inlet line filter b (9), observe the magnetic flap level gauge (4), and ensure that the liquid level is not lower than 2 / 3. b. After filling is completed, close the air release valve (10) and close the liquid inlet valve (8); c. By moving the slide rail to move the translation stage (27) to adapt the length of the product valve, the product valve (37) is connected to the test station inlet pipeline (32) and the test station outlet pipeline (33); d. Tighten the rail locking nut (30), fix the rail moving platform (27), and connect the differential pressure sensor (31) to the inlet and outlet of the product valve (37); e. Move the mobile process system and the test station system to a suitable position through the mobile roller (2) of the process system and the mobile pulley (24) of the test station; f. According to the flow rate required by the external product valve (37), select a suitable pipeline process system, and use a liquid inlet metal hose (35) to connect the process system to the test station; g. Use a reflux metal hose (36) to connect the test station to the process system to circulate the medium; h. Before starting the process pump (13), check the reflux valve regulating valve (15) to ensure that the reflux regulating valve (15) is in an open state; check the back pressure valve (22) to ensure that the back pressure valve (22) is in an open state; i. Start the process pump (13), adjust the corresponding pipeline regulating valve according to the selected flow line, adjust the back pressure valve (22), so that the inlet pressure and flow of the product valve reach the required values, and record the test flow and product valve inlet pressure; j. After the test is completed, close the process pump (13), open the air release valve (10), and open the liquid release valve (11) to discharge the test medium; k. Remove the liquid inlet metal hose (35) and the return metal hose (36) to separate the process system and the test station; l. Remove the external product valve (37), move the test station and process system to the designated location, and complete the test.