Low-temperature medium rapid pressurization test operation system and method

Abstract

The invention discloses a low-temperature medium rapid supercharging test operation system and method, and belongs to the field of application of seals for turbine pumps of liquid rocket engines. The system comprises a rapid pressurization gas distribution unit, a medium rapid supply control unit and a pressure feedback rotating speed regulation driving control unit, through double-path pressurization of a large-flow regulating valve and a pore plate and by utilizing the characteristics of the dual-path pressurization of the large-flow regulating valve and the pore plate, accurate pressure stabilization is achieved through the large-flow regulating valve after rapid pre-pressurization is achieved through the pore plate, and rapid supply and accurate regulation of test pressure are achieved; meanwhile, based on the rapid pressurization technology, the rotating speed of the sealing product in the starting process changes along with pressure in a pressure feedback rotating speed adjusting mode, and the pressure is matched with the rotating speed.

Description

Technical Field

[0001] This invention relates to a rapid pressurization test system and method for cryogenic media, belonging to the field of seals for liquid rocket engine turbopumps. Background Technology

[0002] Seals for liquid rocket engine turbopumps are critical components. To assess the sealing performance and stability of these seals, multi-condition testing under high-speed operation in a cryogenic environment is required before assembling the seals into the turbopump. However, traditional cryogenic operation testing systems differ significantly from those for liquid rocket engine turbopumps. Traditional systems require adjusting the sealing chamber pressure to the pressure under test conditions before starting operation, and due to the high speed, it typically takes 20-50 seconds to reach the rated speed – a prolonged, gradual acceleration process. This type of start-up only allows for steady-state testing of the seals under rated conditions. In contrast, on liquid rocket engine turbopumps, the sealing chamber pressure and speed increase synchronously within a short time, reaching the rated conditions almost simultaneously. Therefore, the seals must undergo a rapid start-up process before reaching their rated condition. In order to evaluate the sealing products for liquid rocket engine turbopumps, it is necessary to test both the rapid start-up process and the rated operation conditions. However, traditional cryogenic operation test systems cannot effectively conduct rapid start-up process tests due to limitations in drive capability, pressurization capability, and pressure-speed control logic. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a rapid pressurization test operation system and method for low-temperature media. Based on pressure feedback to adjust the drive speed, it realizes the assessment of the rapid start-up process and rated operation of sealing products for turbopumps in a low-temperature medium environment.

[0004] The technical solution of this invention is: A rapid pressurization test operation system for cryogenic media includes a rapid pressurization gas distribution unit, a media supply control system unit, and a pressure feedback speed regulation drive control unit; The medium supply control system unit includes a medium supply control module, a medium pressure vessel and components; the medium supply control module outputs nitrogen to the pressure vessel and components, and the flow rate of nitrogen is controlled by a valve group; the pressure vessel and components contain a cryogenic medium, and the cryogenic medium is forced into the pressure feedback speed regulation drive control unit under the action of nitrogen; The rapid pressurization and gas distribution unit is used to output control gas, which controls the on / off state of the valve group in the medium supply control module; The pressure feedback speed regulation drive control unit includes a drive module and a low-temperature sealing test device containing the sealing product to be tested. After the low-temperature sealing test device containing the sealing product to be tested is connected to the low-temperature medium, it is rapidly pressurized to the rated pressure. According to the real-time pressure of the sealing product to be tested, the drive module drives the low-temperature sealing test device to rotate at a speed matching the real-time pressure, so that the sealing product to be tested is in the set working condition of low-temperature rotation.

[0005] Furthermore, the media supply control module includes a main media fast supply unit, a media fast supply branch, and an orifice plate fast supply branch; The main circuit of the medium fast supply unit is equipped with a medium fast supply nitrogen source, a medium fast supply filter, a first medium fast supply main circuit pneumatic control valve, a second medium fast supply main circuit pneumatic control valve, a medium fast supply main circuit pressure transmitter, and a medium fast supply main circuit vent valve. The nitrogen output from the medium fast supply nitrogen source is filtered by the medium fast supply filter, and the filtered nitrogen is transported through pipelines to parallel medium fast supply branches and orifice plate fast supply branches. The pipelines are sequentially equipped with a first medium fast supply main circuit pneumatic control valve, a second medium fast supply main circuit pneumatic control valve, and a medium fast supply main circuit pressure transmitter. The medium fast supply main circuit pressure transmitter is used to measure the gas supply pressure. The rear end of the first medium fast supply main circuit pneumatic control valve is connected to the medium fast supply main circuit vent valve. The medium fast supply branch is equipped with a high-flow pneumatic control valve, a medium fast supply branch pressure transmitter, a medium fast supply branch pneumatic control valve, a medium fast supply branch relief valve, and an electronic pressure controller; the high-flow pneumatic control valve is controlled by the electronic pressure controller, which collects the pressure signal after the high-flow pneumatic control valve, drives and controls it through the rapid pressurization and gas distribution unit, and also exhausts its own gas. The orifice plate quick supply branch is equipped with an orifice plate branch pneumatic control valve, a flow orifice plate, and an orifice plate branch pressure transmitter; the orifice plate branch pneumatic control valve is connected to a flow-limiting orifice plate and a pressure transmitter, and then merges with the medium quick supply branch; the pressure signal collected by the pressure transmitter is fed back to the rapid pressurization and gas distribution unit to control the orifice plate branch pneumatic control valve to complete the opening and closing of the orifice plate quick supply branch.

[0006] Furthermore, the rapid pressurization and gas distribution unit includes a main gas distribution circuit, a control gas supply circuit, an electronic pressure controller gas supply circuit, a solenoid valve assembly, and a rapid pressurization and gas distribution controller; The main gas distribution line is equipped with a gas distribution source, a main gas distribution line shut-off valve, a main gas distribution line filter, and a main gas distribution line solenoid valve. The gas distribution source outputs control gas, which passes through the main gas distribution line shut-off valve, the main gas distribution line filter, and the main gas distribution line solenoid valve. The control gas is then split into two in the pipeline, with one path flowing into the control gas supply line and the other path flowing into the electronic pressure controller gas supply line. The control gas supply circuit is equipped with a control gas supply manual pressure reducing valve, a control gas supply pressure gauge, and a control gas supply venting solenoid valve. The control gas flows into the solenoid valve assembly after passing through the control gas supply manual pressure reducing valve and the control gas supply pressure gauge. The electronic pressure controller's air supply circuit is equipped with a manual pressure reducing valve and an electronic pressure gauge. Control gas flows into the electronic pressure controller of the medium supply control system unit after passing through the manual pressure reducing valve and the electronic pressure gauge. The rapid pressurization and gas distribution controller receives the pressure signal collected by the pressure transmitter and controls the electronic pressure controller and solenoid valve assembly according to the pressure signal.

[0007] Furthermore, the pressure vessel and its components include a pressure vessel, a vessel pressurization path, a vessel venting path, and a vessel medium supply path; The pressure vessel contains a cryogenic medium. A pressure boosting circuit and a venting circuit are located at the top of the pressure vessel, and a medium supply circuit is located at the bottom. Nitrogen gas output from the medium supply control module flows into the pressure boosting circuit, which is equipped with a pressure boosting valve. The venting circuit is directly connected to the pressure vessel, and a pressure transmitter and a venting valve are sequentially installed in the pipeline to monitor the pressure and vent the pressure vessel. The medium supply circuit supplies the cryogenic medium through a medium supply shut-off valve, a medium supply filter, and a medium inlet valve.

[0008] Furthermore, the solenoid valve assembly consists of nine solenoid valves, which are powered and controlled by a rapid pressurization and gas distribution controller; the nine solenoid valves are: medium inlet solenoid valve, container exhaust solenoid valve, container pressurization solenoid valve, medium fast supply branch venting solenoid valve, medium fast supply branch pressurization solenoid valve, orifice plate branch pressurization solenoid valve, second medium fast supply main line solenoid valve, medium fast supply main line venting solenoid valve, and first medium fast supply main line solenoid valve. The pressurized gas distribution is controlled and distributed to the medium supply control module, medium pressure vessel and components by the various solenoid valves of the solenoid valve assembly; among them, the medium inlet solenoid valve is connected to the medium inlet valve of the container, the container exhaust solenoid valve is connected to the container vent valve, the container pressurization solenoid valve is connected to the container pressurization valve, the medium fast supply branch vent solenoid valve is connected to the medium fast supply branch vent valve, the medium fast supply branch pressurization solenoid valve is connected to the medium fast supply branch pneumatic control valve, the orifice plate branch pressurization solenoid valve is connected to the orifice plate branch pneumatic control valve, the second medium fast supply main line solenoid valve is connected to the second medium fast supply main line pneumatic control valve, the medium fast supply main line vent solenoid valve is connected to the medium fast supply main line vent valve, and the first medium fast supply main line solenoid valve is connected to the first medium fast supply main line pneumatic control valve.

[0009] Furthermore, the pressure feedback speed regulation drive control system unit includes a drive module, a low-temperature sealing test device, a sealing cavity pressure transmitter, a pressure speed controller, and a media supply module; The low-temperature sealing test device includes a housing, a sealing product to be tested, a shaft system, and a sealing cavity pressure transmitter. The sealing product to be tested is installed inside the housing and is fixed on the shaft system. The sealing product to be tested is equipped with a sealing cavity pressure transmitter, which collects the pressure signal of the sealing cavity and feeds it back to the pressure speed controller. The drive module is controlled by the pressure speed controller to output driving force, which drives the low temperature sealing test device to rotate, so that the time from the start of the test sealing product to the rated speed meets the time requirement of rapid start-up. The medium supply module is connected to a pressure vessel, which quickly squeezes the medium from the pressure vessel into the sealing product to be tested, so that the pressure in the sealing product to be tested quickly reaches the target pressure. The pressure-speed controller controls the speed of the drive module based on the pressure of the sealing product under test, according to a preset correspondence between pressure and speed.

[0010] Furthermore, in the pressure feedback speed regulation drive control unit, after the pressure vessel is rapidly pressurized, the medium is squeezed into the low-temperature sealing test device. After the sealing cavity pressure transmitter detects the pressure, it feeds back to the pressure speed controller. Then, the drive module drives according to the speed matching the feedback pressure. When the test sealing product reaches the rated pressure condition, the drive module drives to reach the rated speed.

[0011] A rapid pressurization method for cryogenic medium rapid pressurization testing, applied to a cryogenic medium rapid pressurization testing operating system, comprising: After the main gas distribution line is connected, gas is supplied to the control gas supply line and the electronic pressure device gas supply line. The control gas is adjusted to a fixed range by the manual pressure reducing valve of the control gas supply and the pressure reducing valve of the electronic pressure device. The control gas is supplied to the inlet of the solenoid valve group and the electronic pressure controller in the medium rapid supply control unit. The first medium fast supply main air control valve and the second medium fast supply main air control valve are open, the medium fast supply main vent valve is kept closed, the nitrogen from the high-pressure medium fast supply nitrogen source is introduced into the two branches, the container vent valve is closed, the container medium supply shut-off valve is open, and the container medium inlet valve is open. The high-flow pneumatic control valve controls its opening degree under the pressure input control of the electronic pressure controller and the rapid boosting gas distribution controller. After the medium fast supply branch pneumatic control valve is opened, the medium fast supply branch will control the pressure after the high-flow pneumatic control valve of the pressure vessel according to the input pressure. At the same time, the orifice plate branch pneumatic control valve is opened, and high pressure is introduced into the orifice plate branch. The vessel boosting valve is opened, and the orifice plate branch and the medium fast supply branch merge and flow into the pressure vessel for dual-path pre-pressurization. The pressure signal fed back by the orifice plate branch pressure transmitter is sent to the rapid pressurization gas distribution controller. When the pressure reaches the preset threshold of the rapid pressurization gas distribution controller, the orifice plate branch gas control valve is automatically shut off, and the medium rapid supply branch supplies gas to boost the pressure. The electronic pressure controller performs high-precision pressure stabilization and regulation on the container pressure.

[0012] The advantages of this invention compared to the prior art are: This invention discloses a cryogenic medium rapid pressurization test operation system based on pressure feedback-regulated drive speed. On one hand, it optimizes existing pressurization methods by using an electronic pressure controller as a pilot valve to control a high-flow-rate pneumatic control valve, ensuring a high-precision, high-flow-rate medium supply. An orifice plate branch is used for rapid pressurization in the initial stage, and a rapid pressurization gas distribution controller monitors and controls the downstream pressure of the orifice plate branch, simultaneously controlling the rapid supply branch to precisely regulate the downstream pressure. On the other hand, it optimizes the drive mechanism by selecting a high-speed motor with rapid start-up capability. The pressure of the test product in the sealed cavity is used as the speed input condition. A pressure-speed controller matches the speed with the pressure, and by utilizing the rapid pressurization condition, the speed and pressure quickly reach the rated operating conditions, simulating the rapid start-up of a liquid rocket engine. Attached Figure Description

[0013] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the low-temperature medium rapid pressurization test operation system according to an embodiment of the present invention. Detailed Implementation

[0014] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0015] This invention proposes a rapid pressurization test operation system for cryogenic media, such as... Figure 1 As shown, it includes a rapid pressurization and gas distribution unit, a medium supply control system unit, and a pressure feedback speed regulation drive control system unit.

[0016] (1) Rapid boost valve distribution unit 1 The rapid pressurization and gas distribution unit 1 includes a main gas distribution line 12, a control gas supply line 13, an electronic pressure controller gas supply line 14, a solenoid valve assembly 15, and a rapid pressurization and gas distribution controller 16.

[0017] The main gas distribution line 12 is led out from the nitrogen source 121, passes through the main gas distribution line shut-off valve 122, the main gas distribution line filter 123, and the main gas distribution line solenoid valve 124, which are divided into two: one is the control gas supply line 13, which supplies gas to the inlet of the solenoid valve assembly 15, and the other is the electronic pressure control gas line, which supplies gas to the electronic pressure controller.

[0018] A manual pressure reducing valve 131 and a pressure gauge 132 for controlling the air supply are installed between the air supply circuit 13 and the solenoid valve assembly. At the same time, a control air vent circuit is connected in parallel, and the air is vented through the control air vent solenoid valve 133.

[0019] The air supply circuit 14 of the electronic pressure controller is connected to the electronic pressure controller 225 of the medium supply control system unit 2 via the manual pressure reducing valve 141 and the electronic pressure gauge 142.

[0020] The solenoid valve assembly consists of nine solenoid valves. The control air path is distributed to the pneumatic control valves of other units through the solenoid valve assembly. The power supply and control of the solenoid valve assembly are completed by the rapid pressurization and distribution controller 16, which performs remote opening and closing control functions. The nine solenoid valves are: medium inlet solenoid valve 151, container exhaust solenoid valve 152, container pressurization solenoid valve 153, medium fast supply branch venting solenoid valve 154, medium fast supply branch pressurization solenoid valve 155, orifice plate branch pressurization solenoid valve 156, second medium fast supply main line solenoid valve 157, medium fast supply main line venting solenoid valve 158, and first medium fast supply main line solenoid valve 159.

[0021] (2) Media rapid supply unit 2 The medium rapid supply unit 2 consists of a medium supply control module, a medium pressure vessel, and components.

[0022] The media supply control module is divided into two parts by the main line 21 of the media fast supply unit. The media fast supply branch and the orifice plate fast supply branch are connected in parallel to complete the pressurization. After the media fast supply nitrogen source 211 is led out from the media fast supply nitrogen source 211, it passes through the media fast supply filter 212 and then the first media fast supply gas control valve 213 controls the on and off of the nitrogen source of the media fast supply unit main line 21. Then, the second media fast supply gas control valve 214 controls the supply of gas to the gas supply branch. A media fast supply pressure transmitter 215 is installed after the valve to measure the gas supply pressure. A media fast supply main line vent valve 216 is installed between the first media fast supply gas control valve 213 and the second media fast supply gas control valve 214 to release the pressure in the high-pressure long gas supply pipeline.

[0023] The fast-supply branch 22 supplies a high-flow-rate pressurized medium via a high-flow-rate pneumatic control valve 221, a fast-supply branch pressure transmitter 222, and a fast-supply branch pneumatic control valve 223. A fast-supply branch relief valve 224 is connected in parallel after the fast-supply branch pneumatic control valve 223 to release pressure in the fast-supply branch 22. The high-flow-rate pneumatic control valve 221 is controlled by an electronic pressure controller 225 as a pilot valve, controlling a large-flow-rate pressurization through a small-flow-rate control. The electronic pressure controller 225 acquires the pressure signal after the high-flow-rate pneumatic control valve 221 and achieves high-precision control of the high-pressure, high-flow-rate operating conditions after the high-flow-rate pneumatic control valve 221 through the drive control of the fast-pressurization distribution controller 16 and its own self-venting.

[0024] The orifice plate quick supply branch 23 is controlled by the orifice plate branch pneumatic control valve 231, which connects to a flow-limiting orifice plate 232 to quickly supply a large flow rate of pressurized medium. It then merges with the medium quick supply branch 22. Before merging with the orifice plate quick supply branch 23, an orifice plate branch pressure transmitter 233 is connected to monitor the pressurization pressure after the orifice plate. The pressure signal is fed back to the rapid pressurization gas distribution controller 16, which controls the orifice plate branch pneumatic control valve 231 to open and close the orifice plate quick supply branch.

[0025] The pressure vessel and assembly 24 stores the cryogenic medium via pressure vessel 241. A pressure boosting line and a venting line are located at the top of the pressure vessel, and a medium supply line is located at the bottom. The medium fast supply branch and the orifice plate fast supply branch merge and connect to the pressure boosting line, which is equipped with a pressure boosting valve 242 for remote pressure switching. The venting line is directly connected to the pressure vessel, and a pressure transmitter 243 is installed on the pipeline, followed by a venting valve 244, enabling pressure monitoring and remote venting of pressure vessel 241. The medium supply line supplies the cryogenic medium through a medium supply shut-off valve 245, a medium supply filter 246, and a medium inlet valve 247.

[0026] The nine pneumatic shut-off valves 231, 216, 223, 214, 213, 244, 242, 224, and 247 of the rapid medium supply control unit are all remotely controlled by the solenoid valve group 15 of the rapid pressurization and distribution unit.

[0027] (3) Pressure feedback speed regulation drive control system unit 3 The pressure feedback speed regulation drive control unit 3 includes a drive module, a low temperature sealing test device 33, a pressure speed controller 35, a media supply module, and a measurement module.

[0028] The drive module should be selected as a high-speed motor 31 direct drive mode, and connected to the low temperature sealing test device 33 by a high-speed coupling 32. The drive capability should meet the requirements of drive speed, drive power and drive time. That is, while ensuring the speed and power of the product under test, it is necessary to ensure that the time from the start of the start to the rated speed meets the requirements of rapid start time.

[0029] The low-temperature sealing test device 33 needs to have a housing and shaft system for assembling the product to meet the requirements of stable operation and low-temperature environment of the sealed product under test.

[0030] The pressure signal of the sealing cavity provided by the sealing cavity pressure transmitter 34 needs to be fed back to the pressure speed controller 35. Based on the preset correspondence between pressure and speed, the motor is driven at the corresponding speed according to the current sealing cavity pressure.

[0031] The medium supply module supplies medium to the sealing cavity of the cryogenic sealing test device. After the medium is introduced into the medium inlet valve of the container in the medium rapid supply control unit, the cryogenic high-pressure medium of the pressure vessel is rapidly squeezed into the sealing cavity of the cryogenic sealing test device, so that the pressure in the sealing cavity quickly reaches the target pressure.

[0032] The rapid pressurization method of the present invention is as follows: After the main gas distribution line 12 in the rapid pressurization gas distribution unit 1 is turned on, gas is supplied to the control gas supply line 13 and the electronic pressure device gas supply line 14. The control gas supply manual pressure reducing valve 131 and the electronic pressure device gas supply pressure reducing valve 141 are adjusted to control gas within a fixed range. The control gas supply venting solenoid valve 133 is kept closed. Control gas is supplied to the inlet of the solenoid valve group 15 and the electronic pressure controller 225 in the medium rapid supply control unit 2. The rapid pressurization gas distribution unit is then adjusted to the test state.

[0033] To meet the requirement of rapid start-up within 10 seconds, the present invention sets two pressurized air paths from the medium rapid supply main path 21 in the medium rapid supply control unit 2: one is the medium rapid supply branch path 22, and the other is the orifice plate rapid supply branch path 23.

[0034] When rapid startup is required, in the medium rapid supply control unit 2, the first medium rapid supply main line pneumatic control valve 213 and the second medium rapid supply main line pneumatic control valve 214 are opened, while the medium rapid supply main line vent valve 216 remains closed, allowing the high-pressure medium rapid supply nitrogen source 211 to be supplied to both branches. The pressure vessel must ensure that the vessel vent valve 244 is closed, the vessel medium supply shut-off valve 245 is open, and the vessel medium inlet valve 247 is open to guarantee the flow of liquid nitrogen.

[0035] Under the pressure input control of the electronic pressure controller 225 and the rapid pressurization distribution controller 16, the large-flow pneumatic control valve of the medium fast supply branch controls the opening of the large-flow pneumatic control valve 221 through the small-flow control gas. After the pneumatic control valve 223 of the medium fast supply branch 22 is opened, the medium fast supply branch 22 will control the pressure after the large-flow pneumatic control valve 221 of the pressure vessel according to the input pressure. At the same time, the orifice plate branch pneumatic control valve 231 is opened, the orifice plate branch 23 is supplied with high pressure, the container pressurization valve 242 is opened, and the orifice plate branch 23 and the medium fast supply branch 22 merge and flow into the pressure vessel for dual-path pre-pressurization.

[0036] The pressure signal fed back by the orifice plate branch pressure transmitter 233 is sent to the rapid pressurization gas distribution controller 16. After the pressure reaches the preset threshold of the rapid pressurization gas distribution controller 16, the orifice plate branch gas control valve 231 is automatically shut off, and the medium fast supply branch 22 supplies gas to boost the pressure. The electronic pressure controller 225 performs high-precision pressure stabilization and regulation on the container pressure.

[0037] The pneumatic control valves in the rapid medium supply control unit 2 are all opened and closed by controlling the on / off of the control gas through the solenoid valve switch of the rapid pressurization gas distribution unit 1. All the pneumatic control valves correspond one-to-one with the solenoid valve group 15, and can be remotely controlled on / off by the rapid pressurization gas distribution controller 16.

[0038] The method for pressure feedback speed regulation in this invention is as follows: In the pressure feedback speed regulation drive control unit 3, after the pressure vessel 241 is rapidly pressurized, the high-pressure medium is squeezed into the sealing cavity 33. After the pressure transmitter 34 of the low-temperature sealing test device 33 detects the pressure, it feeds back to the pressure speed controller 35, which then drives the high-speed motor 31 to the rated speed through the high-speed coupling 32 according to the speed matched with the feedback pressure. When the sealing cavity of the low-temperature sealing test device 33 reaches the rated pressure condition, the high-speed motor 31 is driven to reach the rated speed.

[0039] This invention utilizes a dual-path pressurization system, combining a high-flow regulating valve and an orifice plate, to rapidly pre-pressurize the product before precisely stabilizing it via the high-flow regulating valve. This allows for rapid supply and precise adjustment of the test pressure. Furthermore, based on rapid pressurization technology, a pressure feedback speed regulation method ensures that the rotational speed of the sealing product changes in tandem with the pressure during startup, achieving a perfect match between pressure and speed. This invention has been successfully applied multiple times in tests involving rapid pressure and speed startup of liquid rocket engines, demonstrating at least the following effects: (1) By setting up a combination of a large flow regulating valve and an electronic pressure controller, the supply of large flow gas is met. Based on the feedback of the downstream pressure measurement value, the large flow regulating valve is remotely controlled with high precision and automatic pressure boosting through a pneumatic pilot valve and a pneumatic control valve.

[0040] (2) By using the pressure sensors in the flow-limiting orifice plate and the high-flow-rate regulating circuit, the gas control valve is automatically controlled under the control of the rapid pressurization gas distribution unit and the gas control controller to complete the initial fast response and high-flow-rate pressurization medium supply.

[0041] (3) In the rapid pressurization condition, the downstream cavity of the medium is large. The medium fast supply branch and the orifice plate branch can be opened at the same time to carry out the initial rapid pressurization. When the downstream pressure of the orifice plate reaches the specified pressure range, the orifice plate branch is disconnected and the medium fast supply branch works alone to carry out high-precision pressure regulation. The medium fast supply branch and the orifice plate branch cooperate with each other to achieve the effects of rapid pressurization and high-precision pressurization at different stages.

[0042] (4) The drive speed is controlled by the pressure feedback of the sealed cavity. The pressure speed driver is set with multiple pressure ranges corresponding to multiple speed ranges. When the pressure of the sealed cavity reaches the pressure range, the motor reaches the corresponding speed range, and finally achieves the purpose of matching pressure and speed, simulating the start-up condition of the product on the liquid rocket engine turbopump.

[0043] (5) By setting a high-speed motor to drive directly, the driving efficiency and slow driving response caused by multi-stage transmission are eliminated, and the fast response start under pressure feedback conditions is met.

[0044] The embodiments described above are merely preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid pressurization test system for cryogenic media, characterized in that, It includes a rapid pressurization and gas distribution unit (1), a medium supply control system unit (2), and a pressure feedback speed regulation drive control unit (3). The medium supply control system unit (2) includes a medium supply control module, a medium pressure vessel and component (24); the medium supply control module outputs nitrogen to the pressure vessel and component (24), and the flow rate of nitrogen is controlled by a valve group; the pressure vessel and component (24) contains a cryogenic medium, and the cryogenic medium is squeezed into the pressure feedback speed regulation drive control unit (3) under the action of nitrogen. The rapid pressurization gas distribution unit (1) is used to output control gas, and the control gas controls the opening and closing of the valve group in the medium supply control module; The pressure feedback speed regulation drive control unit (3) includes a drive module and a low-temperature sealing test device (33) containing the sealing product to be tested. After the low-temperature sealing test device (33) containing the sealing product to be tested is connected to the low-temperature medium, it is quickly pressurized to the rated pressure. According to the real-time pressure of the sealing product to be tested, the drive module drives the low-temperature sealing test device (33) to rotate at a speed matching the real-time pressure, so that the sealing product to be tested is in the set working condition of low-temperature rotation.

2. The cryogenic medium rapid pressurization test operation system according to claim 1, characterized in that, The media supply control module includes a main road (21) for the media fast supply unit, a branch road (22) for the media fast supply unit, and a branch road (23) for the orifice plate fast supply unit. The main circuit (21) of the medium fast supply unit is equipped with a medium fast supply nitrogen source (211), a medium fast supply filter (212), a first medium fast supply main circuit pneumatic control valve (213), a second medium fast supply main circuit pneumatic control valve (214), a medium fast supply main circuit pressure transmitter (215), and a medium fast supply main circuit vent valve (216). The nitrogen gas output from the medium fast supply nitrogen source (211) is filtered by the medium fast supply filter (212), and the filtered nitrogen gas is transported through pipelines to the parallel medium fast supply branch circuit (22) and the orifice plate fast supply branch circuit (23). The pipeline is equipped with the first medium fast supply main circuit pneumatic control valve (213), the second medium fast supply main circuit pneumatic control valve (214), and the medium fast supply main circuit pressure transmitter (215) in sequence. The medium fast supply main circuit pressure transmitter (215) is used to measure the gas supply pressure. The rear end of the first medium fast supply main circuit pneumatic control valve (213) is connected to the medium fast supply main circuit vent valve (216). The medium fast supply branch (22) is equipped with a high-flow pneumatic control valve (221), a medium fast supply branch pressure transmitter (222), a medium fast supply branch pneumatic control valve (223), a medium fast supply branch relief valve (224), and an electronic pressure controller (225). The high-flow pneumatic control valve (221) is controlled by the electronic pressure controller (225). The electronic pressure controller (225) collects the pressure signal after the high-flow pneumatic control valve (221), drives and controls it through the rapid pressurization distribution unit (1), and exhausts its own gas. The orifice plate quick supply branch (23) is equipped with an orifice plate branch pneumatic control valve (231), a flow orifice plate (232), and an orifice plate branch pressure transmitter (233). The orifice plate branch pneumatic control valve (231) is connected to the flow-limiting orifice plate (232) and the pressure transmitter (233), and then merges with the medium quick supply branch (22). The pressure signal collected by the pressure transmitter (233) is fed back to the rapid pressurization and gas distribution unit (1) to control the orifice plate branch pneumatic control valve (231) to complete the opening and closing of the orifice plate quick supply branch.

3. The cryogenic medium rapid pressurization test operation system according to claim 2, characterized in that, The rapid pressurization gas distribution unit (1) includes a main gas distribution line (12), a control gas supply line (13), an electronic pressure controller gas supply line (14), a solenoid valve assembly (15), and a rapid pressurization gas distribution controller (16). The main gas distribution line (12) is equipped with a gas distribution source (121), a main gas distribution line shut-off valve (122), a main gas distribution line filter (123), and a main gas distribution line solenoid valve (124). The gas distribution source (121) outputs control gas, which passes through the main gas distribution line shut-off valve (122), the main gas distribution line filter (123), and the main gas distribution line solenoid valve (124). The control gas is then split into two in the pipeline, one of which flows into the control gas supply line (13), and the other flows into the electronic pressure controller gas supply line (14). The control gas supply circuit (13) is equipped with a control gas supply manual pressure reducing valve (131), a control gas supply pressure gauge (132), and a control gas supply venting solenoid valve (133). The control gas flows into the solenoid valve assembly (15) after passing through the control gas supply manual pressure reducing valve (131) and the control gas supply pressure gauge (132). The electronic pressure controller gas supply circuit (14) is equipped with a manual pressure reducing valve (141) and an electronic pressure gauge (142). After the control gas passes through the manual pressure reducing valve (141) and the electronic pressure gauge (142), it flows into the electronic pressure controller (225) of the medium supply control system unit (2). The rapid pressurization gas distribution controller (16) receives the pressure signal collected by the pressure transmitter (233) and controls the electronic pressure controller (225) and the solenoid valve assembly (15) according to the pressure signal.

4. The cryogenic medium rapid pressurization test operation system according to claim 3, characterized in that, The pressure vessel and components (24) include a pressure vessel (241), a vessel pressurization circuit, a vessel exhaust circuit, and a vessel medium supply circuit; The pressure vessel (241) contains a cryogenic medium. A pressure boosting path and a venting path are set above the pressure vessel (241), and a medium supply path is set below the pressure vessel (241). Nitrogen gas is output from the medium supply control module and flows into the pressure boosting path. A pressure boosting valve (242) is set in the pressure boosting path. The venting path is directly connected to the pressure vessel. A pressure transmitter (243) and a venting valve (244) are set in sequence in the pipeline to complete the pressure monitoring and venting of the pressure vessel (241). The medium supply path supplies the cryogenic medium through a medium supply shut-off valve (245), a medium supply filter (246), and a medium inlet valve (247).

5. The cryogenic medium rapid pressurization test operation system according to claim 4, characterized in that, The solenoid valve assembly (15) consists of 9 solenoid valves, which are powered and controlled by a rapid pressurization and gas distribution controller (16); the 9 solenoid valves are: medium inlet solenoid valve (151), container exhaust solenoid valve (152), container pressurization solenoid valve (153), medium fast supply branch venting solenoid valve (154), medium fast supply branch pressurization solenoid valve (155), orifice plate branch pressurization solenoid valve (156), second medium fast supply main line solenoid valve (157), medium fast supply main line venting solenoid valve (158), and first medium fast supply main line solenoid valve (159). The pressurized gas distribution is controlled and distributed to the medium supply control module, medium pressure vessel and components by the various solenoid valves of the solenoid valve assembly; among them, the medium inlet solenoid valve (151) is connected to the medium inlet valve (247) of the container, the container exhaust solenoid valve (152) is connected to the container vent valve (244), the container pressurization solenoid valve (153) is connected to the container pressurization valve (242), and the medium fast supply branch vent solenoid valve (154) is connected to the medium fast supply branch vent valve (224). The booster solenoid valve (155) is connected to the medium fast supply branch pneumatic control valve (223), the orifice branch booster solenoid valve (156) is connected to the orifice branch pneumatic control valve (231), the second medium fast supply main line solenoid valve (157) is connected to the second medium fast supply main line pneumatic control valve (214), the medium fast supply main line venting solenoid valve (158) is connected to the medium fast supply main line venting valve (216), and the first medium fast supply main line solenoid valve (159) is connected to the first medium fast supply main line pneumatic control valve (213).

6. The cryogenic medium rapid pressurization test operation system according to claim 4, characterized in that, The pressure feedback speed regulation drive control system unit (3) includes a drive module, a low temperature sealing test device (33), a sealing cavity pressure transmitter (34), a pressure speed controller (35), and a medium supply module. The low-temperature sealing test device (33) includes a housing, a sealing product to be tested, a shaft system, and a sealing cavity pressure transmitter. The sealing product to be tested is installed inside the housing and fixed on the shaft system. A sealing cavity pressure transmitter (34) is installed inside the sealing product to be tested. The sealing cavity pressure transmitter (34) collects the pressure signal of the sealing cavity and feeds it back to the pressure speed controller (35). The drive module is controlled by the pressure speed controller (35) to output driving force, which drives the low temperature sealing test device (33) to rotate, so that the time from the start of the test sealing product to the rated speed meets the time requirement of rapid start-up. The medium supply module is connected to the pressure vessel (241) and quickly squeezes the medium from the pressure vessel (241) into the sealing product to be tested, so that the pressure in the sealing product to be tested quickly reaches the target pressure. The pressure-speed controller (35) controls the speed of the drive module based on the pressure of the sealed product under test by using a preset pressure-speed correspondence.

7. The cryogenic medium rapid pressurization test operation system according to claim 6, characterized in that, In the pressure feedback speed regulation drive control unit (3), after the pressure vessel (241) is rapidly pressurized, the medium is squeezed into the low temperature sealing test device (33). After the sealing cavity pressure transmitter (34) detects the pressure, it feeds back to the pressure speed controller (35). Then the drive module drives according to the speed matching the feedback pressure. When the sealed product under test is raised to the rated pressure condition, the drive module drives to reach the rated speed.

8. A rapid pressurization method for a cryogenic medium rapid pressurization test, applied to the cryogenic medium rapid pressurization test operating system as described in claim 4, characterized in that, include: After the main gas distribution line (12) is connected, gas is supplied to the control gas supply line (13) and the electronic pressure device gas supply line (14). The control gas supply manual pressure reducing valve (131) and the electronic pressure device gas supply pressure reducing valve (141) are adjusted to control gas within a fixed range. Control gas is supplied to the inlet of the solenoid valve group (15) and the electronic pressure controller (225) in the medium rapid supply control unit (2). The first medium fast supply main air control valve (213) and the second medium fast supply main air control valve (214) are opened, the medium fast supply main vent valve (216) is kept closed, the nitrogen from the high pressure medium fast supply nitrogen source (211) is introduced into the two branches, the container vent valve (244) is closed, the container medium supply shut-off valve (245) is opened, and the container medium inlet valve (247) is opened; The large flow pneumatic control valve controls the opening degree under the pressure input control of the electronic pressure controller (225) and the rapid boosting gas distribution controller (16). After the medium fast supply branch pneumatic control valve (223) is opened, the medium fast supply branch (22) will control the pressure after the pressure vessel large flow pneumatic control valve (221) according to the input pressure. At the same time, the orifice branch pneumatic control valve (231) is opened, and the orifice branch (23) is supplied with high pressure. The container boosting valve (242) is opened, and the orifice branch (23) and the medium fast supply branch (22) merge and flow into the pressure vessel for dual-path pre-pressurization. The pressure signal fed back by the orifice plate branch pressure transmitter (233) is sent to the rapid boost gas distribution controller (16). After the pressure reaches the preset threshold of the rapid boost gas distribution controller (16), the orifice plate branch gas control valve (231) is automatically cut off. The medium fast supply branch (22) supplies gas to boost the pressure in a single channel. The electronic pressure controller (225) performs high-precision pressure regulation on the container pressure.

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