Semi-closed performance test system for hydraulic turbine pump of liquid rocket engine

Abstract

The invention relates to a semi-closed performance test system for a hydraulic turbine pump of a liquid rocket engine. A turbine inlet of the hydraulic turbine pump is connected with an outlet of a centrifugal pump through a turbine inlet pipeline, and an inlet of the centrifugal pump is communicated with a water pool; a pump inlet of the hydraulic turbine pump is connected with an outlet of the water container through a pump inlet pipeline, and a pump outlet of the hydraulic turbine pump is connected with a liquid inlet of the water container through a pump outlet pipeline; the gas distribution table is connected with a gas inlet of the water container through a gas distribution pipeline; a liquid discharge port of the water container is connected with a discharge pipeline; the discharge pipeline, the pump outlet pipeline, the pump inlet pipeline and the turbine inlet pipeline are each provided with a flowmeter, a stop valve and an adjusting valve. And pressure sensors are arranged at a turbine inlet, a pump inlet and a pump outlet of the hydraulic turbine pump. The device has the capabilities of conveying a high-pressure water medium of a liquid flow test system, testing the performance of a hydraulic test system, maintaining the liquid level of a discharge system to be constant and the like, so that the overall performance test requirement of the hydraulic turbine pump can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid rocket engine fluid testing, and relates to a semi-closed performance testing system for a liquid rocket engine hydraulic turbine pump. Background Art

[0002] The hydraulic turbine pump for a hydrogen-oxygen liquid rocket engine uses a high-pressure liquid medium to drive a hydraulic turbine, achieving pressurized delivery of the liquid oxygen medium at the pump end. The overall performance of a two-way inlet and one-way outlet hydraulic turbine pump is a key technology in its development, providing a basis for engine development. Therefore, it is necessary to design a semi-closed hydraulic turbine pump performance test system tailored to the product characteristics of this pump. This system can meet the test requirements for dynamic balance of the liquid level in the water container during the performance test of this pump.

[0003] At present, the performance test system of turbine pumps mainly focuses on the medium simulation test system of gas-driven turbines or the circulation system with relatively independent turbine flow path and pump flow path, and does not involve the semi-closed hydraulic turbine pump performance test system with two liquid inlets and one liquid outlet. Summary of the Invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the existing technology and propose a semi-closed performance test system for a liquid rocket engine hydraulic turbine pump, which has the capabilities of high-pressure water medium transportation in the liquid flow test system, performance testing in the hydraulic test system, and maintaining a constant liquid level in the discharge system, thereby meeting the overall performance test requirements of the hydraulic turbine pump.

[0005] The solution of the present invention is:

[0006] A semi-closed performance test system for a liquid rocket engine hydraulic turbine pump, comprising a hydraulic turbine pump, a water container, a centrifugal pump, a discharge pipeline, a pump outlet pipeline, a pump inlet pipeline, a turbine inlet pipeline, a gas distribution platform, and a gas distribution pipeline;

[0007] The turbine inlet of the hydraulic turbine pump is connected to the centrifugal pump outlet through a turbine inlet pipeline, and the centrifugal pump inlet is connected to the water tank; the pump inlet of the hydraulic turbine pump is connected to the water container outlet through a pump inlet pipeline, and the pump outlet of the hydraulic turbine pump is connected to the liquid inlet of the water container through a pump outlet pipeline; the gas distribution platform is connected to the gas inlet of the water container through a gas distribution pipeline; the liquid discharge port of the water container is connected to the discharge pipeline;

[0008] Flow meters, stop valves and regulating valves are installed on the discharge pipeline, pump outlet pipeline, pump inlet pipeline and turbine inlet pipeline; pressure sensors are installed at the turbine inlet, pump inlet and pump outlet of the hydraulic turbine pump.

[0009] Preferably, the discharge flow of the discharge line is equal to the liquid flow of the turbine inlet line, which is achieved by adjusting the regulating valve.

[0010] Preferably, a liquid level meter is further included, which is installed on the water container and is used to monitor the liquid level in the water container.

[0011] Preferably, the liquid level gauge is used to monitor the liquid level in the water container to prevent the liquid level in the water container from continuously rising and causing an overpressure risk.

[0012] Preferably, liquid enters the turbine inlet and the pump inlet of the hydraulic turbine pump at the same time, and the liquids are mixed and flow out from the pump outlet at the same time.

[0013] Preferably, the flow meter is used to measure the water medium delivery flow in the discharge pipeline, the pump outlet pipeline, the pump inlet pipeline, and the turbine inlet pipeline.

[0014] Preferably, the stop valve is used to control the flow of water in the discharge pipeline, the pump outlet pipeline, the pump inlet pipeline, and the turbine inlet pipeline.

[0015] Preferably, the regulating valve is used to regulate the flow of the discharge pipeline, the pump outlet pipeline, the pump inlet pipeline, and the turbine inlet pipeline.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] The present invention realizes the supply of high-pressure water medium to the turbine inlet of the hydraulic turbine pump through a centrifugal pump, a turbine inlet pipeline, a stop valve, and a regulating valve. The water medium is supplied to the pump inlet of the hydraulic turbine pump through a water container and a pump inlet pipeline. The water medium is transported to the pump outlet through a water container, a pump outlet pipeline, and a regulating valve. The water container, discharge pipeline, and regulating valve of the present invention realize the discharge of water medium from the discharge pipeline, and simultaneously monitor the liquid level gauge, thereby achieving dynamic balance of the liquid level height of the water container. The water container pressure is constant through the gas distribution table and gas distribution pipeline, thereby achieving the regulation of the pump inlet pressure. The water medium flow rate of the turbine inlet pipeline, the pump inlet pipeline, and the pump outlet pipeline is measured by a flow meter. The present invention realizes the overall performance analysis of the hydraulic turbine pump through data collection of the turbine inlet pressure measuring point, the pump inlet pressure measuring point, and the pump outlet pressure measuring point of the hydraulic turbine pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] The present invention discloses a semi-closed hydraulic turbine pump performance test system. The hydraulic turbine pump product is divided into two liquid inlets and one liquid outlet. The two liquid inlets are the hydraulic turbine inlet and the pump inlet respectively, and the one liquid outlet is the pump outlet. The two liquid inlets are combined inside the hydraulic turbine pump and then flow out from the pump outlet. A set of liquid flow test system is required to provide high-pressure water medium to drive the hydraulic turbine, and a set of pump hydraulic test system is required to complete the pump performance test. Due to the product characteristics of a certain type of hydraulic turbine pump with two liquid inlets and one liquid outlet, the liquid level of the water container in the traditional closed-circulation pump hydraulic test system will continue to increase, and the container will be at risk of overpressure. During the test, it is necessary to discharge the water medium in the pump hydraulic test system to the outside at the same time to keep the liquid level of the water container constant and achieve dynamic balance to form a semi-closed pump hydraulic test system.

[0021] The invention provides a liquid rocket engine hydraulic turbine pump performance test system, which involves several aspects including high-pressure water medium supply, hydraulic test system, water container liquid discharge, and water container pressure stabilization.

[0022] like Figure 1 As shown, the liquid rocket engine hydraulic turbine pump performance test system includes a hydraulic turbine pump 1, a flow meter 2, a water container 3, a stop valve 4, a regulating valve 5, a centrifugal pump 6, a liquid level gauge 7, a discharge pipeline 8, a pump outlet pipeline 9, a pump inlet pipeline 10, a turbine inlet pipeline 11, an air distribution pipeline 12, and an air distribution platform 13.

[0023] The hydraulic turbine pump 1 has three interfaces, namely a turbine inlet, a pump inlet, and a pump outlet. Liquid enters the turbine inlet and the pump inlet at the same time, and after mixing, flows out from the pump outlet at the same time.

[0024] The turbine inlet of hydraulic turbine pump 1 is connected to the outlet of centrifugal pump 6 via turbine inlet pipeline 11, and the inlet of centrifugal pump 6 is connected to the water tank. The pump inlet of hydraulic turbine pump 1 is connected to the outlet of water container 3 via pump inlet pipeline 10, and the pump outlet of hydraulic turbine pump 1 is connected to the liquid inlet of water container 3 via pump outlet pipeline 9. The gas distribution station 13 is connected to the gas inlet of water container 3 via gas distribution pipeline 12. The liquid discharge port of water container 3 is connected to discharge pipeline 8. Flowmeters, shutoff valves, and regulating valves are all installed on discharge pipeline 8, pump outlet pipeline 9, pump inlet pipeline 10, and turbine inlet pipeline 11. Pressure sensors are installed at the turbine inlet, pump inlet, and pump outlet of hydraulic turbine pump 1. Liquid level gauge 7 is installed on water container 3 to monitor the liquid level in water container 3.

[0025] The centrifugal pump 6 draws water from the water pool, pressurizes and transports the water medium, and transports it to the hydraulic turbine inlet of the hydraulic turbine pump 1 through the turbine inlet pipeline, providing the high-pressure water medium required to drive the hydraulic turbine. The rotation of the hydraulic turbine in the hydraulic turbine pump 1 drives the pump-end turbine to rotate to complete the pump-end water pumping.

[0026] Water container 3 is used to store the aqueous medium for testing. The aqueous medium maintains a constant liquid level in water container 3, which is monitored by liquid level gauge 7. The aqueous medium is supplied to the pump inlet of hydraulic turbine pump 1 via pump inlet pipe 10. After being pressurized by the pump in hydraulic turbine pump 1, the aqueous medium flows through pump outlet pipe 9, passes through regulating valve 5, and is then depressurized before returning to water container 3.

[0027] The water medium in the water container 3 maintains a certain liquid level height, and compressed air of a certain pressure is supplied above the liquid level by the gas distribution platform 13 to maintain a constant pressure in the water container 3 to avoid cavitation when the test pump rotates at high speed.

[0028] The water flow at the turbine inlet of hydraulic turbine pump 1 and the water flow at the pump end inlet merge internally and then flow back from the pump outlet of hydraulic turbine pump 1 to water container 3, causing the water capacity of the water container to continuously increase. The aqueous medium in water container 3 is simultaneously discharged externally through discharge pipe 8. The discharge flow rate is adjusted by regulating valve 5 to be equal to the turbine inlet flow rate. At the same time, the liquid level height of liquid level gauge 7 is monitored to maintain dynamic balance of the liquid level height of liquid level gauge 7, preventing the risk of overpressure caused by the continuous rise of the liquid level in water container 3.

[0029] The flowmeter 2 is used to measure the water medium delivery flow of the discharge pipeline 8, the pump outlet pipeline 9, the pump inlet pipeline 10, and the turbine inlet pipeline 11 respectively.

[0030] The stop valve 4 is used to control the flow of water in the discharge pipeline 8, the pump outlet pipeline 9, the pump inlet pipeline 10, and the turbine inlet pipeline 11.

[0031] The regulating valve 5 is used to control the flow of the discharge pipeline 8, the pump outlet pipeline 9, the pump inlet pipeline 10, and the turbine inlet pipeline 11 respectively.

[0032] The turbine inlet pressure measuring point 15, the pump inlet pressure measuring point 16, and the pump outlet pressure measuring point 17 are used to measure the turbine inlet pressure, the pump inlet pressure, and the pump outlet pressure, respectively.

[0033] The installation and working process of the present invention are as follows:

[0034] a. Install the hydraulic turbine pump 1 at the test station, connect the turbine inlet to the turbine inlet pipeline 11 , connect the pump inlet to the pump inlet pipeline 10 , and connect the pump outlet to the pump outlet pipeline 9 .

[0035] b. The pressure in the water container 3 is adjusted to be constant through the gas distribution station 13.

[0036] c. Start the centrifugal pump 6 to pressurize the water medium in the water pool and deliver it to the turbine inlet of the hydraulic turbine pump 1 through the turbine inlet pipe 11. The water flow rate of the turbine inlet pipe 11 is adjusted by the regulating valve 5 in the turbine inlet pipe 11.

[0037] d. After the hydraulic turbine is driven, the pump in the hydraulic turbine pump 1 draws the water medium in the water container 3 into the pump inlet through the pump inlet pipe 10 .

[0038] e. The water medium at the turbine inlet of the hydraulic turbine pump 1 is mixed with the water medium at the pump inlet and output from the pump outlet, and flows back to the water container 3 through the pump outlet pipeline 9. The pump outlet flow rate of the hydraulic turbine pump 1 is adjusted by the regulating valve 5 in the pump outlet pipeline 9.

[0039] f. The water medium in the water container 3 is continuously discharged through the discharge pipe 8, and the discharge flow rate is adjusted to be equal to the water flow rate of the turbine inlet pipe 11 through the regulating valve 5 in the discharge pipe 8. The liquid level height of the liquid level gauge 7 is monitored in real time to achieve dynamic balance of the liquid level in the water container 3.

[0040] g. Measure the flow rates of the turbine inlet pipe 11, the pump inlet pipe 10, and the pump outlet pipe 9 through the flow meter 2.

[0041] h. The overall performance test of the hydraulic turbine pump 1 is achieved by measuring the pressure at the turbine inlet pressure measuring point 14, the pump inlet pressure measuring point 15, and the pump outlet pressure measuring point 16 of the hydraulic turbine pump 1.

[0042] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

Claims

1. A semi-closed performance test system for a liquid rocket engine hydraulic turbopump, characterized by: It comprises a hydraulic turbine pump (1), a water container (3), a centrifugal pump (6), a discharge pipeline (8), a pump outlet pipeline (9), a pump inlet pipeline (10), a turbine inlet pipeline (11), a gas distribution platform (13), and a gas distribution pipeline (12); The turbine inlet of the hydraulic turbine pump (1) is connected to the outlet of the centrifugal pump (6) through a turbine inlet pipeline (11), and the inlet of the centrifugal pump (6) is connected to the water tank; the pump inlet of the hydraulic turbine pump (1) is connected to the outlet of the water container (3) through a pump inlet pipeline (10), and the pump outlet of the hydraulic turbine pump (1) is connected to the liquid inlet of the water container (3) through a pump outlet pipeline (9); the gas distribution platform (13) is connected to the gas inlet of the water container (3) through a gas distribution pipeline (12); and the liquid discharge port of the water container (3) is connected to the discharge pipeline (8); The discharge pipeline (8), the pump outlet pipeline (9), the pump inlet pipeline (10), and the turbine inlet pipeline (11) are all provided with flow meters, stop valves, and regulating valves; and the turbine inlet, pump inlet, and pump outlet of the hydraulic turbine pump (1) are all provided with pressure sensors.

2. A semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: The discharge flow of the discharge line is equal to the liquid flow of the turbine inlet line, which is achieved by adjusting the regulating valve.

3. A semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: The invention also comprises a liquid level meter (7), which is installed on the water container (3) and is used to monitor the liquid level in the water container (3).

4. A semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 3, characterized in that: The liquid level meter (7) is used to monitor the liquid level in the water container (3) to prevent the liquid level in the water container (3) from continuously rising and causing an overpressure risk.

5. The semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: Liquid enters the turbine inlet and pump inlet of the hydraulic turbine pump at the same time, and after mixing, flows out from the pump outlet at the same time.

6. A semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: The flow meter is used to measure the flow rate of water media in the discharge pipeline, pump outlet pipeline, pump inlet pipeline and turbine inlet pipeline.

7. The semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: The stop valve is used to control the flow of water in the discharge pipeline, pump outlet pipeline, pump inlet pipeline and turbine inlet pipeline.

8. The semi-closed performance test system for a liquid rocket engine hydraulic turbopump according to claim 1, characterized in that: The regulating valve is used to adjust the flow of the discharge pipeline, pump outlet pipeline, pump inlet pipeline and turbine inlet pipeline.

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