CN-117007343-B - Gas injection type accumulator flow state test device and test method

CN117007343BCN 117007343 BCN117007343 BCN 117007343BCN-117007343-B

Abstract

The invention provides a gas injection type accumulator flow state test device and a test method. The test device is characterized by comprising a gas injection type pressure accumulator body (26), a storage tank (11), a pressurizing control assembly (37), a pressure accumulator inflating assembly (38), a filling and discharging assembly (39), a circulation supply assembly (40), a gas supply and distribution assembly (41) and a measurement control assembly (42), wherein the pressurizing control assembly (37) is used for controlling and providing pressurizing gas with different flow rates for the storage tank (11) to realize stable control of the pressure of the storage tank (11), the pressure accumulator inflating assembly (38) is used for providing pressurizing gas with constant flow rate for the gas injection type pressure accumulator body (26), and the filling and discharging assembly (39) is used for providing filling and discharging of liquid for the storage tank (11) and the gas injection type pressure accumulator body (26). The invention can test the influence of the change of the liquid flowing state in the conveying pipe on the performance of the gas injection type pressure accumulator, and can reliably verify the working performance of the gas injection type pressure accumulator under the liquid flowing working condition.

Inventors

WANG BIN
ZHU XIAOFEI
LI YANG
LI CHAO
XU TENG
ZHANG HAO
Sha Zhaoming
HUANG YONGHUA
LI XIAOCI

Assignees

上海宇航系统工程研究所

Dates

Publication Date: 20260508
Application Date: 20230320

Claims (8)

1. The gas injection type accumulator flow state test device is characterized by comprising a gas injection type accumulator body (26), a storage tank (11), a pressurizing control assembly (37), a pressure accumulator charging assembly (38), a filling and discharging assembly (39), a circulation supply assembly (40), a gas supply assembly (41) and a measurement control assembly (42), wherein the pressurizing control assembly (37) provides pressurized gas with different flow rates for stable control of the pressure of the storage tank (11) to realize stable control of the pressure of the storage tank (11), the pressure accumulator charging assembly (38) provides pressurized gas with constant flow rate for the gas injection type accumulator body (26), the filling and discharging assembly (39) provides liquid filling and discharging for the storage tank (11) and the gas injection type accumulator body (26), the circulation supply assembly (40) realizes closed circulation flow of liquid in the test device and has an open test and closed circulation test switching function, the gas supply assembly (41) provides gas source pressure with different states for the test device, and the measurement control assembly (42) acquires pressure, flow rate and weight information of the test process, and pressure feedback control is performed on a pressure feedback valve and a pressure control system, so that the liquid level and a solenoid valve of a system are controlled; The circulation supply assembly (40) comprises a second water pump (27) and a second manual stop valve (15), a first manual stop valve (12) is arranged at the bottom of the storage tank (11) and is connected with the gas injection type accumulator body (26) through a metal hard pipe, a branch is led out after the first manual stop valve (12) and connected in series with the second manual stop valve (15) and the second water pump (27), an outlet pipeline of the second water pump (27) is connected with a rear pipeline of the liquid flowmeter (28) to be converged, and a pneumatic ball valve (29) and a pneumatic butterfly valve (30) are connected behind the converged pipeline; When the first manual stop valve (12) is in a closed state and the second manual stop valve (15) is in an open state, the test device is in a closed test mode, the second water pump (27) has a variable frequency speed regulation function, the pulsation change of the liquid flow in the conveying pipe is simulated through the real-time change of the frequency of the circulating water pump in the test process, when the first manual stop valve (12) is in an open state and the second manual stop valve (15) is in a closed state, the test device is in an open test mode, the pneumatic ball valve (29) and the pneumatic butterfly valve (30) are arranged in a liquid discharge pipeline, and the required liquid discharge flow speed is obtained by adjusting the opening of the pneumatic butterfly valve (30).
2. The flow state test device of a gas injection type accumulator according to claim 1, wherein the pressurizing control assembly (37) comprises a first electromagnetic valve (1), a second electromagnetic valve (2), a first orifice plate (3) and a second orifice plate (4), and is connected with a pressurizing check valve (5) and a tank exhaust valve (6) in series through a high-pressure-resistant metal hard pipe, one end of a pipeline of the pressurizing control assembly (37) is connected with a high-pressure outlet of a gas distribution table (33) of the gas distribution assembly (41), the other end of the pipeline is connected with the top of a tank (11) at a position between the pressurizing check valve (5) and the tank exhaust valve (6), a first branch pipe and a second branch pipe which are connected in parallel are arranged between the pressurizing check valve (5) and the gas distribution table (33), the first electromagnetic valve (1) and the first orifice plate (3) are arranged on the first branch pipe, and the second electromagnetic valve (2) and the second orifice plate (4) are arranged on the second branch pipe.
3. The gas injection type accumulator flow state test device according to claim 2, wherein the charging pipeline in the pressurization control assembly (37) is connected through a VCR joint, the first orifice plate (3) and the second orifice plate (4) are both positioned in the charging pipeline, the gas injection type accumulator flow state test device has the functions of disassembly and replacement, the gas injection flow is adjusted through the cooperation of the orifice plates with different apertures, the gas injection type accumulator flow state test device meets the gas injection flow requirement under different liquid flow speed working conditions in the storage tank (11), and the pressure of the storage tank (11) is maintained in a constant range through the opening and closing cooperation of the first electromagnetic valve (1) and the second electromagnetic valve (2).
4. The gas injection type accumulator flow state test device according to claim 1, wherein the accumulator charging assembly (38) comprises a third electromagnetic valve (17), a pressure reducing valve (18), a gas flowmeter (19), a flow regulating valve (20) and a charging check valve (21) which are sequentially connected, the accumulator charging assembly (38) is connected with an accumulator exhaust valve (14) and a pipeline deflation valve (16) in series through metal pipelines, one end of each pipeline is connected with the top of a gas injection type accumulator body (26) at a position between the charging check valve (21) and the accumulator exhaust valve (14), the other end of each pipeline is connected with a high-pressure pipeline outlet of a gas distribution table (33), and a downstream constant pressure output is maintained through the pressure reducing valve (18) and is matched with the flow regulating valve (20) to charge the gas injection type accumulator body (26) with constant flow.
5. The gas injection type accumulator flow state test apparatus according to claim 1, wherein the measurement control unit (42) includes a measurement controller (36), a tank level sensor (9), a tank pressure sensor (10), an accumulator level sensor (22), an accumulator pressure sensor Pz, a first temperature sensor Tq provided in a gas injection line of an accumulator gas injection unit (38), a second temperature sensor Tj provided in a gas injection line, a first pressure sensor Pq provided in a gas injection line, a second pressure sensor Pj provided in a gas injection line, a gas flow meter (19), a pipe pressure sensor Pc provided in a bottom outlet line of a gas injection type accumulator body (26), a liquid flow meter (28), and an electronic scale (24), the electronic scale (24) is located below an outlet of a gas injection type accumulator exhaust drain for real-time measurement of a weight of the discharged liquid, the measurement controller (36) collects signals of the pressure sensors, the temperature sensors, the liquid level sensor, and the electronic scale, records and stores, and then automatically controls the valves to control the pressure and the liquid level of the system, The electronic scale (24) has remote data transmission and storage functions.
6. The gas injection type accumulator flow state test device according to claim 1, wherein glass observation windows are arranged on the straight barrel section of the gas injection type accumulator body (26) and the side wall of the conveying pipe, a first camera (25) is arranged beside the observation window of the gas injection type accumulator body (26), and a second camera (31) is arranged beside the observation window of the side wall of the conveying pipe for observing the fluctuation of the liquid level of the gas injection type accumulator body (26) and the gas inclusion condition of liquid in the conveying pipe in the test process.
7. The gas injection type accumulator flow state test device according to claim 1, wherein the gas supply and distribution assembly (41) comprises a high-pressure gas cylinder group (35) and a gas distribution table (33), the filling and discharging assembly (39) comprises a first water pump (34) and a filling valve (13), the first water pump (34) of the filling and discharging assembly (39) is connected with the filling valve (13) through a plastic hose, and the filling valve (13) is arranged at the bottom of the storage tank (11).
8. A gas injection type accumulator flow state testing method, characterized in that it uses the gas injection type accumulator flow state testing apparatus according to any one of claims 1 to 7, comprising the steps of: S1, test preparation, which comprises filling a storage tank (11) and an air injection type accumulator body (26) and pre-pressurizing the storage tank (11); The filling of the storage tank (11) and the gas injection type accumulator body (26) comprises the steps of opening a measurement controller (36), detecting and confirming that initial values of measurement parameters are normal, keeping each valve of the test device in a closed state, opening only a storage tank exhaust valve (6), simultaneously opening a first water pump (34) and a filling valve (13), closing the first water pump (34) and the filling valve (13) when the reading of a storage tank liquid level sensor (9) reaches a set value, and closing the storage tank exhaust valve (6) after the liquid level in the storage tank (11) is stable; Opening a switch valve of a high-pressure gas cylinder group (35), conveying high-pressure gas to a pressurizing control assembly (37) and an accumulator inflation assembly (38) through a gas distribution table (33), supplying low-pressure gas to a valve control gas path, alternately controlling a first electromagnetic valve (1), a second electromagnetic valve (2) in the pressurizing control assembly (37) and a third electromagnetic valve (17) in the accumulator inflation assembly (38), respectively inflating the storage tank (11) and the gas injection accumulator body (26) until the reading of a conveying pipe pressure sensor Pc reaches a set value, and paying attention to the liquid level position in the gas injection accumulator body (26) through a first camera (25) so as to keep the liquid level position near a limiting hole; S2, testing, namely an open test mode and a closed test mode; The open test mode comprises the steps of closing a second manual stop valve (15), opening a first manual stop valve (12), opening a pneumatic ball valve (29), adjusting a pneumatic butterfly valve (30) to control current, observing the indication of a liquid flowmeter (28), keeping the opening degree of the pneumatic butterfly valve (30) unchanged when the flow reaches a set value, recording the current value, closing the pneumatic ball valve (29), supplementing air to a storage tank (11) and an air injection type accumulator body (26) to Pc to the set value, simultaneously keeping the liquid level in the air injection type accumulator body (26) to be near a limit hole, controlling the first electromagnetic valve (1), the second electromagnetic valve (2), the third electromagnetic valve (17), the fourth electromagnetic valve (23) and the pneumatic ball valve (29) in sequence through a measurement control assembly (42), enabling high-pressure air to enter the storage tank (11) through a pressurizing control assembly (37), enabling the other high-pressure air to enter the air injection type accumulator body (26) through an accumulator inflation assembly (38) in a constant amount, enabling liquid and air in the air injection type accumulator body (26) to pass through an exhaust hole, observing and recording the liquid and the liquid level in the air injection type accumulator body (26) in each test process, the pressure accumulation type accumulator body and the weight, and the first camera head (25) and the second camera head (31) in the test process, and observing the weight of the air in the first camera head and the air injection type accumulator body (25) in the test mode, ending the test when the running time of the test device reaches a set value; The closed test mode comprises the steps of opening a second manual stop valve (15), closing a first manual stop valve (12), sequentially controlling a third electromagnetic valve (17), a fourth electromagnetic valve (23) and a second water pump (27) through a measurement control assembly (42), enabling high-pressure gas to enter a gas injection type pressure accumulator body (26) through a pressure accumulator inflation assembly (38) at a constant flow rate, enabling liquid and gas in the gas injection type pressure accumulator body (26) to be discharged through a gas discharge hole, adjusting the frequency of the second water pump (27), changing the liquid flow state, observing and recording the temperature, pressure and weight parameters of each measuring point in the test process and the liquid level state in the gas injection type pressure accumulator body (26) through a second camera (31), and ending the test when the running time of the test device reaches a set value.

Description

Gas injection type accumulator flow state test device and test method Technical Field The invention relates to the technical field of accumulator test, in particular to a gas injection type accumulator flow state test device and a test method. Background The liquid rocket POGO vibration is a dynamic instability problem generated by coupling pressure pulsation of a power system and longitudinal vibration of a structure, affects the low-frequency vibration environment and flight reliability of a carrier rocket, and generally adopts a method of installing an accumulator between a propellant conveying pipe and an engine, reduces the natural frequency of a pipeline system, staggers the natural frequency of the pipeline system and the natural frequency of an rocket body structure, and achieves the effect of inhibiting the rocket POGO effect. With the increase of the carrier rocket scale, the whole rocket frequency is lower, the required accumulator volume is larger, the use requirement is not met by adopting the traditional metal bellows type accumulator, and the gas injection type accumulator with simple processing technology, high structural efficiency and larger volume can be applied to a new generation of large carrier rocket. The existing pressure cycle test method adopted by the performance test of the metal bellows type pressure accumulator is not suitable for the dynamic performance test of the gas injection type pressure accumulator. Through searching the prior art, patent CN113820136A 'a pressure balance test device and a test method thereof' discloses a pressure balance test device and a test method of a gas injection type pressure accumulator based on excitation equipment, but the test device is only suitable for the condition that liquid in the pressure accumulator is in a non-flowing state, belongs to the static test category, and cannot test the influence of the change of the flowing state of the liquid in a conveying pipe on the performance of the gas injection type pressure accumulator. Therefore, a test device capable of reliably verifying the working performance of the gas injection type pressure accumulator under the liquid flow working condition is needed to be applied to the development test of the gas injection type pressure accumulator. Disclosure of Invention The invention aims to provide a flow state test device and a flow state test method for an air injection type pressure accumulator, which can test the influence of the change of the flow state of liquid in a conveying pipe on the performance of the air injection type pressure accumulator and reliably verify the working performance of the air injection type pressure accumulator under the working condition of liquid flow. In order to achieve the above purpose, the invention provides a flow state test device for an air injection type accumulator, which is characterized by comprising an air injection type accumulator body 26, a storage tank 11, a pressurization control assembly 37, an accumulator inflation assembly 38, an injection and release assembly 39, a circulation supply assembly 40, an air supply assembly 41 and a measurement control assembly 42, wherein the pressurization control assembly 37 provides pressurized air with different flow rates for stable control of the pressure of the storage tank 11 to realize stable control of the pressure of the storage tank 11, the accumulator inflation assembly 38 provides pressurized air with constant flow rate for the air injection type accumulator body 26, the injection and release assembly 39 provides liquid injection and release for the storage tank 11 and the air injection type accumulator body 26, the circulation supply assembly 40 realizes closed circulation flow of liquid in the test device and has an open test and closed circulation test switching function, the air supply assembly 41 provides air source pressure with different states for the test device, and the measurement control assembly 42 collects pressure, flow rate and weight information of a test process, and controls the opening and closing of an electromagnetic valve through pressure feedback control so as to control the pressure and liquid level of the system. Further, the pressurization control assembly 37 includes a first electromagnetic valve 1, a second electromagnetic valve 2, a first orifice plate 3 and a second orifice plate 4, and is connected in series with a pressurization check valve 5 and a storage tank exhaust valve 6 through a high-pressure resistant metal hard pipe, one end of a pipeline of the pressurization control assembly 37 is connected with a high-pressure path outlet of a gas distribution table 33 of the gas distribution assembly 41, the other end of the pipeline is connected with the top of a storage tank 11 at a position between the pressurization check valve 5 and the storage tank exhaust valve 6, a first branch pipe and a second branch pipe which are connected in parallel are included between the