An open-closed switchable two-way liquid flow test device

Abstract

The utility model provides a kind of open, closed switchable two-way liquid flow test device, including first pressure tank, second pressure tank, first pump test pipeline, second pump test pipeline and to be measured thrust chamber;Third manual ball valve is equipped between first pressure tank and second pressure tank;The output end of first pressure tank is connected with the input end of first pump test pipeline by first output branch, and the output end of second pressure tank is connected with the input end of second pump test pipeline by second output branch;The return end of second pressure tank is connected with the output end of first pump test pipeline and second pump test pipeline by return branch in parallel.The utility model discloses a kind of open, closed switchable two-way liquid flow test device, solve the problem that existing liquid flow test technology is difficult to consider the differentiated performance test demand of component such as thrust chamber and turbopump on the same test platform.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace technology, and in particular relates to a dual-path liquid flow test device that can switch between open and closed modes. Background Technology

[0002] The development of liquid rocket engines relies on fluid flow tests to verify the performance (including flow-pressure characteristics, dynamic response, and cavitation characteristics) of fluid circuit components such as the thrust chamber, turbopump, valves, and pipelines, and to compare these results with design and simulation results. Currently, fluid flow test benches are mainly divided into two types: open-loop and closed-loop. Open-loop test benches have a simple structure, with the medium discharged or recycled after use. They are suitable for flow tests of components such as valves, injectors, and cooling channels, but suffer from drawbacks such as high medium consumption, weak temperature and pressure control, and difficulty in conducting long-term, multi-condition tests. Closed-loop test benches use the medium in a recirculating manner and are equipped with pressurized exhaust and heat exchange systems. They are suitable for testing the cavitation performance, dynamic characteristics, and long-term stable operation of turbopumps. However, their structure is complex, fluid replacement and cleaning are difficult, and the operating mode is limited, making them unsuitable for conditions such as the thrust chamber that require one-time discharge.

[0003] Due to the limitations of open-circulation test benches in related technologies, such as high medium consumption, poor temperature and pressure control, and difficulty in long-term multi-condition testing, as well as closed-circulation test benches, such as complex structure, difficulty in fluid replacement and cleaning, single mode and inability to simulate one-time discharge conditions, existing fluid flow testing technologies are unable to meet the differentiated performance testing needs of components such as thrust chambers and turbopumps on the same test platform. This results in problems such as limited testing capabilities, poor test repeatability, increased costs and cycles. Utility Model Content

[0004] In view of this, the present invention aims to at least partially solve one of the related technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A dual-path liquid flow test device that can switch between open and closed modes includes a first pressure tank, a second pressure tank, a first pump test pipeline, a second pump test pipeline, and a thrust chamber to be tested.

[0007] A third manual ball valve is provided between the first pressure tank and the second pressure tank;

[0008] The output end of the first pressure tank is connected to the input end of the first pump test pipeline through the first output branch, and the output end of the second pressure tank is connected to the input end of the second pump test pipeline through the second output branch.

[0009] The reflux end of the second pressure tank is connected in parallel with the output ends of the first pump test pipeline and the second pump test pipeline through the reflux branch;

[0010] The first pump test pipeline contains a first three-way valve, and the second pump test pipeline contains a second three-way valve. Both the first three-way valve and the second three-way valve are connected to the inlet of the thrust chamber to be tested.

[0011] Furthermore, the first pump test pipeline is connected to the first output branch and the return branch, and includes the following components arranged sequentially along the medium flow direction: an outlet electric ball valve, a first filter, a flow meter, a first pump under test, a first electric flow regulating valve, a first three-way valve, and a first return electric ball valve. A first pressure sensor and a first temperature sensor are provided at both the input and output ends of the first pump under test.

[0012] Furthermore, the first pump test pipeline also includes a first high-point vent valve, which is located between the liquid outlet electric ball valve and the first filter.

[0013] Furthermore, the second pump test pipeline is connected to the second output branch and the return branch, and includes the following components arranged sequentially along the medium flow direction: a first electric ball valve, a second high-point exhaust valve, a second filter, a second pump under test, a second electric flow regulating valve, a second three-way valve, and a second return electric ball valve. A second pressure sensor and a second temperature sensor are provided at both the input and output ends of the second pump under test.

[0014] Furthermore, it also includes a pressure control system and two filling systems, which are respectively connected to a first pressure tank and a second pressure tank, and both the first pressure tank and the second pressure tank are connected to the pressure control system.

[0015] Furthermore, it also includes two third pressure sensors and two third temperature sensors. The first three-way valve is connected to the thrust chamber through one third pressure sensor and one third temperature sensor, and the second three-way valve is connected to the thrust chamber through one third pressure sensor and one third temperature sensor.

[0016] Furthermore, it also includes a recovery water tank, and the output end of the thrust chamber to be tested is connected to the recovery water tank.

[0017] Compared with existing technologies, the dual-channel liquid flow testing device with switchable open and closed modes described in this utility model has the following advantages:

[0018] 1. The first and second pump test pipelines allow for independent parameter control (pressure, flow rate, and temperature do not interfere with each other). In closed-loop mode, two turbopumps can be tested simultaneously (e.g., the left pipeline tests the liquid oxygen pump, and the right pipeline tests the fuel pump), significantly improving test efficiency. In open-loop mode, the two pipelines correspond to the oxygen and fuel supply lines of the thrust chamber, respectively, accurately simulating the actual operating conditions of a rocket engine.

[0019] 2. The dual-pipeline design provides redundancy and backup capabilities. If one pipeline fails, the other can still continue testing. It also supports mixed testing scenarios: for example, the left pipeline operates a closed-loop test pump A, while the right pipeline operates an open-loop system to supply liquid to the thrust chamber. One device can simultaneously meet the testing needs of two types of components, covering more R&D verification scenarios.

[0020] 3. The operating position can be switched (closed circulation position → open circulation position) via a three-way valve, allowing for function conversion within the same pipeline without disassembly:

[0021] When testing the pump: the three-way valve connects to the second pressure tank to form a closed circulation loop, which meets the requirements for long-term stability and cavitation characteristics testing of the pump;

[0022] When testing the thrust chamber: the three-way valve is switched to the thrust chamber inlet, converting the pipeline into an open liquid supply channel, directly delivering the medium to the thrust chamber. Core components are reused in both modes to avoid redundant construction. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a schematic diagram of a dual-channel liquid flow test device that can switch between open and closed modes, as described in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. First pressure tank; 2. Manual ball valve for liquid discharge; 3. Electric ball valve for liquid discharge; 4. First high-point vent valve; 5. First filter; 6. Flow meter; 7. First pressure sensor; 8. First temperature sensor; 9. First pump under test; 10. First electric flow regulating valve; 11. First three-way valve; 12. Thrust chamber under test; 13. First electric return ball valve; 14. Third filter; 15. First manual ball valve; 16. Third manual ball valve; 17. Pressure control system; 18. Filling system; 19. Recycle water tank. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] A dual-channel fluid flow testing device that can switch between open and closed modes, such as... Figure 1 As shown, the system includes a first pressure tank 1, a second pressure tank, a first pump test pipeline, a second pump test pipeline, and a thrust chamber 12 to be tested. A third manual ball valve 16 is provided between the first pressure tank 1 and the second pressure tank. The output end of the first pressure tank 1 is connected to the input end of the first pump test pipeline through a first output branch, and the output end of the second pressure tank is connected to the input end of the second pump test pipeline through a second output branch. The return end of the second pressure tank is connected in parallel with the output ends of the first pump test pipeline and the second pump test pipeline through a return branch. The first pump test pipeline contains a first three-way valve 11, and the second pump test pipeline contains a second three-way valve. Both the first three-way valve 11 and the second three-way valve are connected to the inlet of the thrust chamber 12 to be tested.

[0032] It also includes a pressure control system 17 and two filling systems 18, which are respectively connected to a first pressure tank 1 and a second pressure tank. Both the first pressure tank 1 and the second pressure tank are connected to the pressure control system 17. It also includes two third pressure sensors and two third temperature sensors. A first three-way valve 11 is connected to the thrust chamber through one third pressure sensor and one third temperature sensor, and a second three-way valve is also connected to the thrust chamber through one third pressure sensor and one third temperature sensor. It also includes a recovery water tank 19, and the output end of the thrust chamber 12 under test is connected to the recovery water tank 19.

[0033] By switching the operating position (closed circulation position → open circulation position) using the first and second three-way valves, the function can be switched on the same pipeline without disassembly:

[0034] When testing the pump: the three-way valve connects to the second pressure tank to form a closed circulation loop, which meets the requirements for long-term stability and cavitation characteristics testing of the pump;

[0035] When testing the thrust chamber: the three-way valve is switched to the thrust chamber inlet, converting the pipeline into an open liquid supply channel, directly delivering the medium to the thrust chamber. Core components are reused in both modes to avoid redundant construction.

[0036] Both the first and second output branches are equipped with manual ball valves for liquid discharge, and the first and second output branches are connected by the first manual ball valve 15; the return branch is equipped with a third filter and a third high-point exhaust valve.

[0037] The first pump test pipeline connects the first output branch and the return branch, and includes, in sequence along the medium flow direction: an electric ball valve 3 for liquid outlet, a first filter 5, a flow meter 6, a first pump under test 9, a first electric flow regulating valve 10, a first three-way valve 11, and a first electric ball valve 13 for return flow. A first pressure sensor 7 and a first temperature sensor 8 are installed at both the input and output ends of the first pump under test 9. The first pump test pipeline also includes a first high-point vent valve 4, which is located between the electric ball valve 3 for liquid outlet and the first filter 5.

[0038] The second pump test pipeline is connected to the second output branch and the return branch, and includes the following components arranged sequentially along the medium flow direction: a first electric ball valve, a second high-point exhaust valve, a second filter, a second pump under test, a second electric flow regulating valve, a second three-way valve, and a second return electric ball valve. A second pressure sensor and a second temperature sensor are installed at both the input and output ends of the second pump under test.

[0039] The first and second pump test pipelines allow for independent parameter control (pressure, flow rate, and temperature do not interfere with each other). In closed-loop mode, two turbopumps can be tested simultaneously (e.g., the left pipeline tests the liquid oxygen pump, and the right pipeline tests the fuel pump), significantly improving test efficiency. In open-loop mode, the two pipelines correspond to the oxygen and fuel supply lines of the thrust chamber, respectively, accurately simulating the actual operating conditions of a rocket engine.

[0040] The dual-pipeline design provides redundancy and backup capabilities; if one pipeline fails, the other can still continue testing. It also supports mixed testing scenarios: for example, the left pipeline operates a closed-loop test pump A, while the right pipeline operates an open-loop system to supply liquid to the thrust chamber. A single device can simultaneously meet the testing needs of two types of components, covering more R&D verification scenarios.

[0041] How this example works

[0042] Step 1: Install the first pump under test 9 into the first pump test pipeline, and seal its inlet end with the pipe section where the first pressure sensor 7 and the first temperature sensor 8 are located, and connect its outlet end to the first electric flow regulating valve 10. At the same time, switch the first three-way valve 11 to the direction of connecting the first return electric ball valve 13, close the first manual ball valve 15 (parallel valve), and open the third manual ball valve 16 (series valve) so that the first pressure tank on the left and the first pressure tank on the right form a series circuit. The first pressure tank on the left serves as the return medium collection unit, and the first pressure tank on the right serves as the pressure-stabilized liquid supply source.

[0043] The test medium is injected into the first pressure tank on the right through the filling system 18. The pressure control system 17 is activated to pressurize the first pressure tank on the right to the target pressure value. The manual ball valve 2 and the electric ball valve 3 are opened simultaneously. The gas in the pipeline is discharged using the first high point exhaust valve 4. After the medium flows through the first filter 5 to complete the impurity interception, the initial flow rate is monitored by the flow meter 6.

[0044] Closed-loop test execution

[0045] The medium flows along the path: first pressure tank → first filter 5 → flow meter 6 → first pressure sensor 7 / first temperature sensor 8 → first pump under test 9 → first electric flow regulating valve 10 → first three-way valve 11 → first return electric ball valve 13 → third filter 14 → first pressure tank → second pressure tank → third manual ball valve 16 → first pressure tank in a cycle. The operating conditions are changed by adjusting the first electric flow regulating valve 10. The cavitation characteristics and dynamic response of the pump are analyzed by combining sensor data acquisition.

[0046] Step 2: Disassemble the first pump under test 9, connect the oxygen inlet of the thrust chamber 12 under test to the first pump test pipeline and the fuel inlet to the second pump test pipeline, switch the first three-way valve 11 to the direction of connecting the thrust chamber 12 under test, close the first manual ball valve 15 and the third manual ball valve 16 to isolate the two tanks in series, and deploy the recovery water tank 19 at the nozzle of the thrust chamber.

[0047] Dual-channel independent parameter control

[0048] The pressure control system 17 pressurizes the second pressure tank to the target pressure of the oxygen circuit and the first pressure tank to the target pressure of the fuel circuit. The first electric flow regulating valve 10 of the first pump test pipeline is independently adjusted to the set flow rate of the oxygen circuit, and the corresponding regulating valve of the second pump test pipeline is adjusted to the set flow rate of the fuel circuit. After the medium is purified by the filter, the parameters are monitored in real time by the flow meter 6 and the sensor.

[0049] Open-type test execution

[0050] The medium is input synchronously along the path: first pressure tank → first filter 5 → flow meter 6 → first pressure sensor 7 / first temperature sensor 8 → first three-way valve 11 → thrust chamber 12 under test (oxygen path) and second pressure tank → corresponding filter → flow meter → pressure / temperature sensor → three-way valve → thrust chamber 12 under test (fuel path). The mixed medium is injected into the thrust chamber and then flows into the recovery water tank 19. The performance is verified by comparing the pressure difference-flow curves of the two paths.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-channel liquid flow testing device that can switch between open and closed modes, characterized in that: It includes a first pressure tank (1), a second pressure tank, a first pump test pipeline, a second pump test pipeline, and a thrust chamber to be tested (12); a third manual ball valve (16) is provided between the first pressure tank (1) and the second pressure tank; The output end of the first pressure tank (1) is connected to the input end of the first pump test pipeline through the first output branch, and the output end of the second pressure tank is connected to the input end of the second pump test pipeline through the second output branch; The reflux end of the second pressure tank is connected in parallel with the output ends of the first pump test pipeline and the second pump test pipeline through the reflux branch; The first pump test line contains a first three-way valve (11), and the second pump test line contains a second three-way valve. Both the first three-way valve (11) and the second three-way valve are connected to the inlet of the thrust chamber (12) to be tested.

2. The dual-channel liquid flow testing device that can switch between open and closed modes according to claim 1, characterized in that: The first pump test pipeline is connected to the first output branch and the return branch, and includes the following components arranged in sequence along the medium flow direction: liquid outlet electric ball valve (3), first filter (5), flow meter (6), first pump under test (9), first electric flow regulating valve (10), first three-way valve (11) and first return electric ball valve (13). The first pump under test (9) is equipped with a first pressure sensor (7) and a first temperature sensor (8) at both the input and output ends.

3. The dual-channel liquid flow test device that can switch between open and closed modes according to claim 2, characterized in that: The first pump test pipeline also includes a first high-point exhaust valve (4), which is located between the liquid outlet electric ball valve (3) and the first filter (5).

4. The dual-channel liquid flow testing device that can switch between open and closed modes according to claim 1, characterized in that: The second pump test pipeline is connected to the second output branch and the return branch, and includes the following components arranged sequentially along the medium flow direction: a first electric ball valve, a second high-point exhaust valve, a second filter, a second pump under test, a second electric flow regulating valve, a second three-way valve, and a second return electric ball valve. A second pressure sensor and a second temperature sensor are installed at both the input and output ends of the second pump under test.

5. A dual-channel liquid flow testing device with open and closed switching as described in any one of claims 1-4, characterized in that: It also includes a pressure control system (17) and two filling systems (18), the two filling systems (18) being connected to a first pressure tank (1) and a second pressure tank respectively, and both the first pressure tank (1) and the second pressure tank being connected to the pressure control system (17).

6. The dual-channel liquid flow test device with switchable open and closed operation according to claim 5, characterized in that: It also includes two third pressure sensors and two third temperature sensors. The first three-way valve (11) is connected to the thrust chamber through one third pressure sensor and one third temperature sensor, and the second three-way valve is connected to the thrust chamber through one third pressure sensor and one third temperature sensor.

7. The dual-channel liquid flow test device with open and closed switching as described in claim 5, characterized in that: It also includes a recovery water tank (19), and the output end of the thrust chamber to be tested (12) is connected to the recovery water tank (19).

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