CN105973552B - Combinational environment Coordinated Loading System in cryogenic propellant transfer pipeline vibration test - Google Patents

Abstract

The invention discloses the combinational environment Coordinated Loading Systems in a kind of cryogenic propellant transfer pipeline vibration test, including cryogenic propellant tank, temperature sensor, pressure sensor, experiment pipeline, voltage-stablizer, super-pressure gas cylinder, the first cryogenic high pressure shut-off valve, cryogenic high pressure safety valve, pressure electromagnetic valve for adjusting, four-way switching device, the first pipeline switching tooling, the second pipeline switching tooling, three-dimensional switching device, the second cryogenic high pressure shut-off valve, pressurization solenoid valve.The system can be achieved at the same time cryogenic propellant filling and high pressure loading, it is ensured that accuracy, the controllability of dwell time that experiment pipeline pressurizes during analog vibration is tested are capable of the actual environment of more real simulation test management.The system design is simple, operation is extremely convenient.

Description

Composite Environment Coordinated Loading System in Vibration Test of Cryogenic Propellant Delivery Pipeline

technical field

The invention belongs to the technical field of low-temperature pipeline vibration tests, and in particular relates to a composite environment coordinated loading system in low-temperature propellant delivery pipeline vibration tests.

Background technique

Compared with traditional launch vehicle propellants, the Long March 5 rocket uses liquid hydrogen/liquid oxygen propellants as engine fuel, which has the advantages of no pollution, no toxicity, sufficient combustion and high thrust. At present, liquid hydrogen/liquid oxygen propellants have also become the fuel of choice for new launch vehicles of the world's space powers. The problem that comes with it is that various connecting pipelines need to be arranged between the fuel storage tank and the engine in the rocket body. The pipelines are in a state of low temperature and high pressure during work, and they are subjected to dynamic loads during flight. Therefore, in order to ensure the successful development of the new rocket, the vibration test of the rocket body pipeline is essential, and in the vibration test, it is necessary to simulate the low temperature and high pressure state of the pipeline, so that the reliability of the pipeline under working conditions The assessment is more realistic.

Since the temperatures of liquid hydrogen and liquid oxygen are very low, about 20K (-253°C) and 80K (-193°C) respectively, the hydrogen self-generated pressurized pipeline of the local liquid hydrogen storage tank needs to be tested for its actual working state in the vibration test. The simulation, including the temperature and pressure inside the pipeline. For the environmental simulation of the low-temperature pipeline vibration test with a pressure value of 13.5MPa, it is still blank in the development of the previous launch vehicle models. Moreover, after the low-temperature propellant filling and pressurization equipment of the existing low-temperature propellant is filled, there are various flanges, cut-offs, etc. After the valve and sensor interface are cooled at low temperature (about -193°C), there are different degrees of shrinkage stress, resulting in poor airtightness of the overall equipment. Therefore, the lack of an applicable environmental simulation system has caused great difficulties in environmental testing of pipeline conditions. In addition, due to the insufficient time for the internal pressure of the pipeline in the low temperature state, the real reliability of the pipeline simulation environment is seriously affected. Therefore, the present invention provides a composite environment coordinated loading system to ensure the accuracy of pressurization after the low-temperature propellant is introduced during the vibration test of the pipeline, the controllability of the pressure holding time, and the test equipment, products and The safety of personnel, more realistic simulation of the actual use environment of the pipeline, to achieve the assessment objectives of the pipeline vibration test.

Contents of the invention

The invention provides a composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test. For the low-temperature propellant filling of the pipeline, the physical isolation between the low-temperature propellant filling system and the high-pressure loading system of the pipeline is realized by the three-way switching device and the four-way switching device, and safety is added in the low-temperature propellant high-pressure loading system. The valve and solenoid valve ensure the pressure relief and the release of low-temperature propellant after the vibration test, and a temperature sensor and a pressure sensor are installed on the top of the four-way transfer device to realize accurate measurement of the temperature and pressure in the test pipeline, and remote Controlled data reference.

The composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test provided by the present invention includes a low-temperature propellant tank, a temperature sensor, a pressure sensor, a test pipeline, a voltage stabilizer, an ultra-high pressure gas cylinder, and a first low-temperature High pressure stop valve, low temperature and high pressure safety valve, pressure regulating solenoid valve, four-way transfer device, first pipeline transfer tooling, second pipeline transfer tooling, three-way transfer device, second low temperature and high pressure stop valve, plus pressure solenoid valve; the temperature sensor and pressure sensor are placed on the top of the four-way transfer device, and the four-way transfer device is respectively connected to the first low-temperature and high-pressure stop valve, low-temperature and high-pressure safety valve, pressure regulating solenoid valve and test pipeline, and the four-way transfer device The device is connected to one end of the test pipeline through the first pipeline transfer tooling, and the first low-temperature and high-pressure stop valve is connected to the low-temperature propellant tank through the low-temperature propellant filling hose; the three-way conversion device is respectively connected to the second pipeline transfer The tooling, the second low temperature and high pressure cut-off valve, the pressurized solenoid valve, and the three-way transfer device are connected to the other end of the test pipeline through the second pipeline transfer tooling, and the second low temperature and high pressure stop valve is connected to the The pressure stabilizer is connected, the pressurized solenoid valve is connected with the ultra-high pressure gas cylinder through the ultra-high pressure pressurized hose, the four-way transfer device is connected with the first pipeline transfer tool, and the three-way transfer device is connected with the second pipeline transfer tool. The connecting tooling is connected by an ultra-high pressure filling and pressurizing hose.

The cryogenic propellant is liquid nitrogen, liquid hydrogen, liquid oxygen.

The first low-temperature and high-pressure stop valve, low-temperature and high-pressure safety valve, pressure regulating solenoid valve, four-way switching device, three-way switching device, second low-temperature and high-pressure stop valve, and pressure solenoid valve are all placed on the support tray.

The position of the pressurizer is higher than that of the test pipeline, so as to ensure that the low-temperature propellant in the pressurizer can be backflowed into the test pipeline in time.

The beneficial effects of the present invention are as follows:

The invention can realize low-temperature propellant filling and high-pressure loading at the same time, ensures the accuracy of pressurization and controllability of pressure-holding time of test pipelines in the process of simulating vibration tests, and can more realistically simulate the actual environment of test management. The system is simple in design and extremely convenient in operation.

Description of drawings

Fig. 1 is a schematic diagram of a composite environment coordinated loading system of the present invention;

1-Removable low-temperature propellant tank 2-First low-temperature and high-pressure shut-off valve 3-Four-way transfer device 4-Temperature sensor 5-Pressure sensor 6-Low temperature and high pressure safety valve 7-Cryogenic propellant filling hose 8-Pressure adjustment Solenoid valve 9-Ultra-high pressure filling pressurized hose 10-Pipeline transfer tooling 11-Three-way transfer device 12-Pressure solenoid valve 13-Second low temperature and high pressure cut-off valve 14-Voltage regulator 15-Ultra high pressure booster Pressure hose 16-ultra-high pressure cylinder 17-test pipeline 18-support tray 19-vibration table

Detailed ways

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, the composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test provided by the present invention consists of a movable low-temperature propellant tank (1), a low-temperature high-pressure shut-off valve (2), and a four-way transfer device ( 3), temperature sensor (4), pressure sensor (5), low temperature and high pressure safety valve (6), low temperature propellant filling hose (7), pressure regulating solenoid valve (8), super high pressure filling and pressurizing hose (9), pipeline transfer tooling (10), three-way transfer device (11), pressurized solenoid valve (12), low temperature and high pressure cut-off valve (13), voltage stabilizer (14), ultra-high pressure pressurized soft Tube (15), ultra-high pressure cylinder (16), test pipeline (17), support tray (18), vibration table (19).

1. Cryogenic propellant filling subsystem

When filling the test pipeline with low-temperature propellant, the low-temperature propellant flows through the movable low-temperature propellant tank (1) → low-temperature propellant filling hose (7) → low-temperature and high-pressure shut-off valve (2) → four-way transfer Device (3)→Ultra-high pressure filling and pressurizing hose (9)→Test pipeline (17)→Ultra-high pressure filling and pressurizing hose (9)→Three-way adapter (11)→Low temperature and high pressure cut-off valve ( 13)→low temperature propellant filling hose (7)→pressure regulator (14), after the low temperature propellant in the pressure regulator (14) is filled up (monitored by remote control equipment), due to the pressure regulator (14) The natural height difference between the place where the test pipeline (17) is placed can also ensure that the low-temperature propellant in the pressurizer (14) can flow back in time to supplement the test pipeline.

2. Cryogenic propellant high pressure loading subsystem

After the test pipeline (17) is filled with liquid nitrogen, close the low-temperature and high-pressure shut-off valve (2) and the low-temperature and high-pressure shut-off valve (13), so that the ultra-high pressure gas cylinder (16) is in the open state, and the pressurized solenoid valve (12) Pressurize the test pipeline (17), and monitor the pressure value of the test pipeline (17) by the pressure sensor (5), and make necessary adjustments. When the system is pressurized, it avoids the flow of high-pressure gas through the regulator, reduces the circulation of high-pressure gas, and ensures the stability and adjustability of the pressure value.

3. Cryogenic propellant real-time monitoring subsystem

The temperature sensor (4) and the pressure sensor (5) are arranged on the top of the four-way transfer device (3) which is relatively close to the test pipeline (17), so that the temperature and pressure in the test pipeline (17) can be monitored in real time, and the data can be updated. It has research and reference value for authenticity and reliability. After the test pipeline (17) simulates the low-temperature and high-pressure working conditions, the low-temperature propellant and high-pressure release can be performed through the pressure-regulating solenoid valve (8) and the release port of the pressurizer (14), which makes the propellant of the present invention more quickly. The composite environment coordinates the loading system to return to the normal temperature and pressure state.

Aiming at the actual situation of simulating the low-temperature and high-pressure working state of the first-stage pipeline of the CZ-5 launch vehicle core, the low-temperature propellant is liquid nitrogen as an example, the design pressure value is 20MPa, and the design temperature is -196°C.

When filling the test pipeline (17) with liquid nitrogen, open the first low-temperature and high-pressure cut-off valve (2) and the second low-temperature and high-pressure cut-off valve (13), and close the The first low temperature and high pressure stop valve (2) and the second low temperature and high pressure stop valve (13). Open the ultra-high pressure gas cylinder (16), pressurize the test pipeline (17) through the pressurization solenoid valve (12), remotely monitor the pressure sensor (5) during pressurization, and close the ultra-high pressure gas cylinder (16) after the pressure value meets the test requirements. The high-pressure gas cylinder (16), the working environment simulation of the test pipeline (17) is basically completed, and the vibration table (19) is opened to carry out the vibration assessment test. If the pressure in the pipeline increases in the follow-up test, the pressure regulating solenoid valve (8) can be opened remotely to regulate the pressure.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. The composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test, including low-temperature propellant tanks, temperature sensors, pressure sensors, test pipelines, pressure stabilizers, and ultra-high pressure gas cylinders, is characterized in that it also includes the first A low-temperature and high-pressure stop valve, a low-temperature and high-pressure safety valve, a pressure regulating solenoid valve, a four-way transfer device, a first pipeline transfer tool, a second pipeline transfer tool, a three-way transfer device, and a second low-temperature and high-pressure stop valve , pressurized solenoid valve; the temperature sensor and pressure sensor are placed on the top of the four-way transfer device, and the four-way transfer device is respectively connected to the first low-temperature and high-pressure stop valve, low-temperature and high-pressure safety valve, pressure regulating solenoid valve and test pipeline, four-way The conversion device is connected to one end of the test pipeline through the first pipeline conversion tooling, and the first low-temperature and high-pressure stop valve is connected to the low-temperature propellant tank through the low-temperature propellant filling hose; the three-way conversion device is respectively connected to the second pipeline The transfer tooling, the second low temperature and high pressure cut-off valve, the pressurized solenoid valve, and the three-way transfer device are connected to the other end of the test pipeline through the second pipeline transfer tool, and the second low temperature and high pressure stop valve is filled with soft The tube is connected with the regulator, the pressurized solenoid valve is connected with the ultra-high pressure cylinder through the ultra-high pressure pressurized hose, between the four-way transfer device and the first pipeline transfer tooling, and between the three-way transfer device and the second pipe The road transfer tooling is connected by an ultra-high pressure filling and pressurizing hose. 2. The composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test according to claim 1, wherein the low-temperature propellant is liquid nitrogen or liquid hydrogen or liquid oxygen. 3. The composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test according to claim 1 or 2, characterized in that, the first low-temperature high-pressure stop valve, low-temperature high-pressure safety valve, pressure regulating solenoid valve, The four-way switching device, the three-way switching device, the second low-temperature and high-pressure stop valve, and the pressurized solenoid valve are all placed on the support tray. 4. The composite environment coordinated loading system in the low-temperature propellant delivery pipeline vibration test according to claim 1 or 2, characterized in that, the position of the voltage stabilizer is higher than that of the test pipeline.