A method and system for increasing pressure during test run of oxygen box power system

Abstract

An embodiment of the present invention provides a method and system for boosting pressure during a test run of an oxygen box power system, comprising: a pre-launch boosting pipeline, an oxygen box charging pipeline, and an oxygen self-generated boosting pipeline; the pre-launch boosting pipeline is connected in parallel with the oxygen box charging pipeline; the pre-launch boosting pipeline, the oxygen box charging pipeline, and the oxygen self-generated boosting pipeline are all connected to the oxygen box through an oxygen box boosting adapter; a helium flowmeter, a first boosting solenoid valve, a pre-launch boosting solenoid valve, and a one-way valve are sequentially arranged on the pre-launch boosting pipeline; a helium flowmeter, a second boosting solenoid valve, and an oxygen box charging switch are sequentially arranged on the oxygen box charging pipeline; one end of the oxygen self-generated boosting pipeline is connected to the engine, and the other end of the oxygen self-generated boosting pipeline is connected to the oxygen box; a tee is arranged on the pre-launch boosting pipeline, and the three ports of the tee are respectively connected to the helium flowmeter, the helium flowmeter, and a ground helium source.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket power systems, and in particular to a test run pressurization method and system for an oxygen box power system. Background Art

[0002] The new generation launch vehicle power system test is one of the landmark large-scale ground tests in the prototype stage of the launch vehicle. The power system test is a large-scale comprehensive experiment that combines the booster delivery system and the engine of the entire rocket body sub-stage. The main purpose is to verify the rationality, matching and correctness of the booster delivery system and the engine in the power system. After the test, the boost calculation model, boost scheme, boost control logic, etc. are effectively analyzed and improved based on the measurement data, providing a strong basis for flight state design.

[0003] The test run of the rocket propulsion system has the outstanding characteristics of great technical difficulty, many participating systems and high complexity. At present, the booster system of the launch vehicle propulsion system test is relatively complex. There are many types and quantities of on-rocket booster solenoid valves and ground booster solenoid valves. The on-rocket booster pipelines and ground booster pipelines are relatively complex. At the same time, the control logic of the booster solenoid valve is also relatively complex, which not only increases the difficulty of research and design of the booster and booster system, but the ground booster solenoid valve is controlled by the oxygen box air pillow pressure, which also increases the work of cable research and design, production and processing, laying, fixing and installation. At the same time, the large number of valve types and quantities also increases the production and processing costs and cycle of the booster and booster system.

[0004] The applicant found that there are at least the following problems in the prior art: the supplementary pressurization system for the launch vehicle power system test is complex, lacks reliability and controllability, and has a long production and processing cycle. Summary of the invention

[0005] The present invention provides a method and system for boosting pressure during a test run of an oxygen box power system. By integrating the design of a boosting pressure system for a launch vehicle power system test, the reliability and controllability of the system are improved, and the boosting pressure of the power system is accurately achieved. In addition, the efficiency of production and processing is greatly improved, and the processing cost is reduced.

[0006] To achieve the above-mentioned purpose, on the one hand, an embodiment of the present invention provides an oxygen box power system test boosting system, comprising:

[0007] Pre-launch pressurization pipeline, oxygen tank filling pipeline, oxygen self-generating pressurization pipeline;

[0008] The pre-fire boosting pipeline, the oxygen box charging pipeline and the oxygen self-generating boosting pipeline are all connected to the oxygen box through an oxygen box boosting adapter;

[0009] The oxygen box inflation pipeline is provided with a second helium flow meter, a second pressure-compensating solenoid valve and an oxygen box inflation switch in sequence;

[0010] One end of the oxygen self-generating pressurization pipeline is connected to the engine, and the other end of the oxygen self-generating pressurization pipeline is connected to the oxygen box through the oxygen box pressurization adapter;

[0011] The pre-shooting boosting pipeline is sequentially provided with a three-way connection, a first helium flowmeter, a first pressure-compensating solenoid valve, a pre-shooting boosting solenoid valve and a one-way valve; the three ports of the three-way connection are respectively connected to the first helium flowmeter, the second helium flowmeter and a ground helium source.

[0012] On the other hand, an embodiment of the present invention provides an oxygen box power system test pressure boosting method, using an oxygen box power system test pressure boosting system, including the following steps:

[0013] Before the test ignition, the oxygen box is pressurized before firing, the first pressure-compensating solenoid valve is opened, the second pressure-compensating solenoid valve is closed, and the pre-fire pressurization solenoid valve is opened or closed according to the air pillow pressure of the oxygen box;

[0014] At the first set time after the test ignition, the first pressure-compensating solenoid valve is closed, the second pressure-compensating solenoid valve is closed, the pre-fire boost solenoid valve is closed, and the oxygen tank is pressurized through the oxygen self-generating boost pipeline;

[0015] When the second set time is reached after the test ignition, the oxygen self-generated boost pipeline is kept to boost the oxygen tank, the first boost solenoid valve is opened, and the second boost solenoid valve is opened; the pre-fire boost solenoid valve is opened or closed according to the oxygen tank air pillow pressure.

[0016] The above technical solution has the following beneficial effects: the types and number of valves in the boosting and pressure-supplementing system of the present invention are relatively small, and the number of pipelines is relatively small and the length is relatively short. The entire on-arrow boosting and pressure-supplementing system is relatively simple. The pre-launch boosting solenoid valve in the boosting and pressure-supplementing system not only plays the role of pre-launch boosting of the oxygen box before the power system test run and ignition, but also plays the role of logical control of the ground pressure-supplementing system of the oxygen box after the power system test run and ignition. The present invention uses a simple pre-launch boosting solenoid valve for multiple functions. By using the pre-launch boosting solenoid valve for multiple functions, the ground pressure-supplementing system is simplified. The present invention provides a control logic for the pre-launch boosting and pressure-supplementing system of the power system test oxygen box, and explains the opening and closing curves and control decision logic of the solenoid valve. The ground pressure-compensating system of the present invention uses only two pressure-compensating solenoid valves to solve the pressure-compensating problem of the oxygen box during the power system test run, and the two ground pressure-compensating solenoid valves are not controlled by the air pillow pressure of the oxygen box, avoiding the oxygen box boost controller and the ground pressure-compensating solenoid valve connecting the cable to control the pressure-compensating solenoid valve, which not only simplifies the hardware facilities such as electrical, cable, and cable connectors, but also omits the work of ground cable research and design, production and processing, laying, fixing, and installation, and simplifies the oxygen box pressure-compensating control system. The pressure-compensating system of the present invention is a two-way pressure-compensating system, which increases the pressure-compensating flow rate and avoids the situation where the pressure-compensating capacity is insufficient during the power system test run due to the small pressure-compensating flow rate. Adding a helium flowmeter to the oxygen box ground pressure-compensating system can accurately measure the oxygen box ground pressure-compensating flow rate, and provide original data for the oxygen box boost-compensating analysis after the power system test run. The boost-compensating system is relatively simple, and the types of valves and pipelines are single and the number is small. The research and development difficulty is low, and the processing and production cycle is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a test run pressure boosting system of an oxygen box power system provided by an embodiment of the present invention;

[0019] Figure 2 It is a flow chart of a method for increasing pressure during a test run of an oxygen box power system provided by an embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of an oxygen box pressurization adapter provided in an embodiment of the present invention;

[0021] Figure 4 It is a partial three-dimensional structural diagram of an oxygen box power system test boosting system provided by an embodiment of the present invention;

[0022] Figure 5 It is an opening and closing curve of a first pressure boosting solenoid valve of a test boosting pressure boosting system of an oxygen box power system provided by an embodiment of the present invention;

[0023] Figure 6 It is an opening and closing curve of a second pressure boosting solenoid valve of a test boosting pressure boosting system of an oxygen box power system provided by an embodiment of the present invention;

[0024] Figure 7 It is a pressure control band and other pressure distribution diagrams of a pre-fire boost solenoid valve of an oxygen box power system test boost pressure system provided by an embodiment of the present invention;

[0025] Figure 8 The present invention provides a schematic diagram of decision logic of an oxygen box pre-fire pressurization and pressure supplementation control system of an oxygen box power system test pressurization system.

[0026] Description of Figure Numbers:

[0027] 1. Oxygen box; 2. Engine; 3. Oxygen self-generated boost heater; 4. Oxygen self-generated boost pipeline; 5. Oxygen box boost adapter; 6. Oxygen box energy dissipator; 7. Oxygen box exhaust valve; 8. Oxygen box safety valve; 9. Oxygen box pressure measuring tube; 10. Oxygen box air pillow pressure sensor; 11. Oxygen box boost controller; 12. Ground helium source; 13. Filter; 14. Pressure reducing valve; 15. Tee; 16. First helium flowmeter; 17. First pressure compensation solenoid valve; 18. First-stage tail plug-in connector ; 19. Pre-shooting boost solenoid valve; 20. One-way valve; 21. Pre-shooting boost pipeline; 22. Second helium flowmeter; 23. Second compensating solenoid valve; 24. Oxygen tank charging interface; 25. Oxygen tank charging switch; 26. Oxygen tank charging pipeline; 51. Interface between oxygen tank boost adapter and oxygen self-generated boost pipeline; 52. Interface between oxygen tank boost adapter and pre-shooting boost pipeline; 53. Interface between oxygen tank boost adapter and oxygen tank charging pipeline; 54. Interface between oxygen tank boost adapter and oxygen tank. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the booster system of the embodiment of the present invention, the on-rocket pressurization of the oxygen tank is self-generated oxygen pressurization, and no ground pressurization is performed for 0s to 30s after the power system test ignition, thereby providing the power system with the original data of 0s to 30s of self-generated oxygen pressurization. This 0s to 30s original data can provide data for the pressurization calculation during the flight phase (under the condition of no ground booster system).

[0030] The embodiment of the present invention provides an oxygen box power system test pressure boosting system, such as Figure 1 As shown, including:

[0031] Pre-launch pressurization pipeline 21, oxygen box charging pipeline 26, oxygen self-generated pressurization pipeline 4;

[0032] As an implementation method, the pre-fire boost pipeline 21 is connected in parallel with the oxygen tank charging pipeline 26;

[0033] The pre-injection pressurization pipeline 21, the oxygen box charging pipeline 26 and the oxygen self-generated pressurization pipeline 4 are all connected to the oxygen box 1 through the oxygen box pressurization adapter 5; Figure 3 As shown, the oxygen box pressurization adapter 5 includes: an interface 51 between the oxygen box pressurization adapter and the oxygen self-generated pressurization pipeline, an interface 52 between the oxygen box pressurization adapter and the pre-injection pressurization pipeline, an interface 53 between the oxygen box pressurization adapter and the oxygen box charging pipeline, and an interface 54 between the oxygen box pressurization adapter and the oxygen box. The oxygen box pressurization adapter 5 is connected to the oxygen box energy dissipator 6, which is at the top of the oxygen box 1.

[0034] The first helium flowmeter 16, the first pressure-compensating solenoid valve 17 (K2), the pre-fire pressure-compensating solenoid valve 19 (K1) and the one-way valve 20 are sequentially arranged on the pre-fire pressure-compensating pipeline 21; before the power system is tested and ignited, the oxygen box is pressurized before firing, specifically including: the helium from the ground helium source 12 is sequentially passed through the filter 13, the pressure reducing valve 14, the three-way 15, the helium flowmeter 16, the pressure-compensating solenoid valve 17, the first-stage tail plug-in connector 18, the pre-fire pressure-compensating solenoid valve 19, the one-way valve 20, the oxygen box pressure-compensating adapter 5, and the oxygen box energy dissipator 6 to pressurize the oxygen box 1 before firing. Among them, the first pressure-compensating solenoid valve 17 is connected to the pre-fire pressure-compensating solenoid valve 19 through the first-stage tail plug-in connector 18.

[0035] A second helium flow meter 22, a second pressure compensation solenoid valve 23 (K3) and an oxygen box filling switch 25 are sequentially arranged on the oxygen box filling pipeline 26;

[0036] One end of the oxygen self-generating pressurizing pipeline 4 is connected to the engine 2, and the other end of the oxygen self-generating pressurizing pipeline 4 is connected to the oxygen tank 1;

[0037] A tee 15 is provided on the pre-shooting pressurization pipeline 21 , and three ports of the tee 15 are respectively connected to the first helium flow meter 16 , the second helium flow meter 22 and the ground helium source 12 .

[0038] In order to further filter out the excess debris in the pressure-compensating helium, the ground helium source 12 is connected to a filter 13; in order to prevent the pressure-compensating gas from being too high and the flow rate from being too large, the filter 13 is connected to a pressure reducing valve 14, and the pressure reducing valve 14 is connected to a three-way valve 15. The function of the filter 13 is to filter out the excess debris in the pressure-compensating helium to prevent the excess debris in the pressure-compensating helium from causing the electromagnetic valve to become stuck. Filtering the excess helium prevents the excess debris from entering the electromagnetic valve, causing the first pressure-compensating electromagnetic valve 17, the second pressure-compensating electromagnetic valve 23, and the pre-shooting boost electromagnetic valve 19 to fail to open or close.

[0039] The pressure reducing valve 14 reduces the pressure of the 35MPa helium source to 5MPa to prevent the pressure of the boosting gas from being too high and the flow rate from being too large; adding the pressure reducing valve 14 can stabilize the pressure of the boosting gas and thus stabilize the flow rate of the boosting helium; adding the pressure reducing valve 14 reduces the pressure of the high-pressure helium from 35MPa to 5MPa, which can prevent the high-pressure gas from entering the oxygen self-generated boosting pipeline 4, which is subjected to high pressure and causes the pipeline to rupture. Adding the pressure reducing valve 14 can reduce the pressure, reduce the boosting flow rate, stabilize the inlet pressure of the solenoid valve, stabilize the boosting flow rate, and prevent the high-pressure gas from entering the self-generated boosting pipeline and causing the self-generated boosting pipeline to rupture.

[0040] In order to further ensure normal oxygen injection and control the pressure of the oxygen box, an oxygen box exhaust valve 7, an oxygen box safety valve 8 and an oxygen box pressure measuring tube 9 are provided on the oxygen box 1.

[0041] The function of the oxygen tank exhaust valve 7 is: during the liquid oxygen filling period, the oxygen tank exhaust valve needs to be opened to fill the liquid oxygen into the oxygen tank. After the test run is completed, the oxygen tank exhaust valve needs to be opened to exhaust the oxygen tank for post-processing.

[0042] The function of the oxygen tank safety valve 8 is: the oxygen tank safety valve is a mechanical valve. The safety valve is a safety device for the oxygen tank. It is mainly used to control the pressure of the oxygen tank to prevent the occurrence of safety accidents such as oxygen tank rupture and excessive pressure caused by overpressure in the oxygen tank. It is a very important safety device.

[0043] The main function of the oxygen tank safety valve is to protect the oxygen tank. When the pressure inside the oxygen tank exceeds the set value, the safety valve will automatically start to discharge the excess gas to keep the pressure inside the oxygen tank within a safe range.

[0044] The function of the oxygen box pressure gauge tube 9 is: the temperature of the oxygen box air pillow is relatively low. If the pressure sensor is placed directly in the oxygen box, the pressure sensor cannot withstand low temperature conditions. Adding a pressure lead pipe, the gas at the end of the pressure lead pipe is at room temperature, which avoids the low temperature condition of the pressure sensor. When the oxygen box is pressurized, the gas flow rate in the oxygen box is fast and the kinetic energy is large, which can easily destroy the pressure sensor. The pressure lead pipe can reduce the flow rate of the gas in the pressure lead pipe and reduce the kinetic energy of the pressurized gas. The pressure sensor works in an environment with a very low gas flow rate, which is conducive to improving the working life of the pressure sensor.

[0045] In order to ensure timely detection of the air pillow pressure of the oxygen tank 1 and send the pressure data, the pre-fire boost solenoid valve 19 is connected to the oxygen tank 1 through the oxygen tank pressure measuring tube 9. The oxygen tank pressure measuring tube 9 is connected to the oxygen tank air pillow pressure sensor 10, and the oxygen tank air pillow pressure sensor 10 is connected to the oxygen tank boost controller 11. After the power system test ignition, the oxygen tank air pillow pressure sensor 10 detects the air pillow pressure of the oxygen tank 1 and sends the pressure data to the oxygen tank boost controller 11.

[0046] In order to further control the air pillow pressure of the oxygen box 1, the oxygen box boost controller 11 is connected to the signal of the pre-launch boost solenoid valve 19. After making a decision, the oxygen box boost controller 11 controls the opening and closing of the pre-launch boost solenoid valve 19, thereby controlling the air pillow pressure of the oxygen box 1. The oxygen box air pillow pressure control is to achieve boost flow control. According to the pressure requirements of the engine and the oxygen box at different times of the test run, the boost gas flow entering the oxygen box is controlled so that the boost gas enters the oxygen box at a certain flow rate and temperature, thereby achieving the purpose of controlling the oxygen box air pillow pressure and minimizing the required boost gas volume. When the oxygen box pressure exceeds the rated operating conditions, the safety valve opens the exhaust to discharge the excess boost gas. In closed boosting, the boost gas flow can be controlled by the on-off of the boost solenoid valve and the pressure compensation solenoid valve, and the boost flow is controlled by the downstream orifice plate. No boost gas will be discharged during the test run and flight. The closed boosting method has higher pressure control accuracy, which minimizes the amount of boost gas used, and also makes the design of the oxygen box structural load more refined. The purpose of reducing the structural mass can be achieved through optimization.

[0047] In order to further connect the ground gas source and the on-arrow booster pipeline to each other before the rocket takes off, the first pressure-compensating solenoid valve 17 is connected to the pre-launch booster solenoid valve 19 through the first-stage tail end plug-in connector 18. Before the rocket takes off, the gas from the ground gas source is pressurized through the plug-in connector and the on-arrow booster pipeline oxygen box. When the rocket ignites and flies, the plug-in connector falls off, and the on-arrow booster pipeline is separated from the ground gas source. Therefore, the plug-in connector can realize the booster function of the rocket before launch, so that all the booster gas before the rocket is launched comes from the ground gas source, and the rocket on-arrow gas source is used after the rocket takes off, which can reduce the booster gas on the rocket. The number and structural weight of the on-arrow gas cylinders on the arrow improve the carrying capacity of the rocket.

[0048] In order to further reduce the flow rate of the pressurized gas entering the oxygen box air pillow, the oxygen box pressurization adapter 5 is connected to the oxygen box energy dissipator 6, and the oxygen box energy dissipator 6 is arranged at the top of the inner part of the oxygen box 1. The main implementation principle of the oxygen box energy dissipator 6 to reduce the flow rate of the pressurized gas entering the oxygen box air pillow is: continuously increase the flow cross-section to reduce the speed, reduce the kinetic energy of the pressurized gas entering the oxygen box within a short distance, and ensure that the pressurized gas flow does not cause liquid oxygen splashing; through the multi-stage sieve holes, the small hole group silencer principle is used to reduce noise and make the flow rate uniform.

[0049] The embodiment of the present invention also provides a method for increasing pressure during a test run of an oxygen box power system, using the above-mentioned oxygen box power system test increase pressure system, such as Figure 2 As shown, the following steps are included:

[0050] S101: Before the test ignition, the oxygen tank 1 is pressurized before firing, the first pressure-compensating solenoid valve 17 is opened, the second pressure-compensating solenoid valve 23 is closed, and the pre-fire pressurization solenoid valve 19 is opened or closed according to the oxygen tank air pillow pressure;

[0051] S102: At the first set time after the test ignition (0 to 30 seconds after the test ignition), close the first pressure-compensating solenoid valve 17, close the second pressure-compensating solenoid valve 23, close the pre-fire boost solenoid valve 19, and boost the oxygen tank 1 through the oxygen self-generated boost pipeline 4; after the power system test ignition, the oxygen tank on-arrow boost is oxygen self-generated boost. The high-temperature oxygen passes through the oxygen self-generated boost heater 3, the oxygen self-generated boost pipeline 4, the oxygen tank boost adapter 5, and the oxygen tank energy dissipator 6 to provide the oxygen tank 1 with oxygen self-generated boost.

[0052] S103: When the second set time is reached after the test ignition (30 seconds after the test ignition), the oxygen self-generated booster pipeline 4 is kept to boost the oxygen tank 1, the first pressure-compensating solenoid valve 17 is opened, and the second pressure-compensating solenoid valve 23 is opened, and the pre-shooting booster solenoid valve 19 is opened or closed according to the oxygen tank air pillow pressure.

[0053] The ground helium source 12 is connected to a filter 13, the filter 13 is connected to a pressure reducing valve 14, and the pressure reducing valve 14 is connected to a three-way valve 15; the first pressure supplement solenoid valve 17 is connected to the pre-injection pressure boosting solenoid valve 19 through a first-stage tail end plug-in connector 18;

[0054] Before the test ignition, the oxygen tank 1 is pressurized before firing, specifically including:

[0055] The helium of the ground helium source 12 is controlled to pass through the filter 13, the pressure reducing valve 14, the tee 15, the first helium flowmeter 16, the first pressure compensation solenoid valve 17, the first-stage tail end plug-in connector 18, the pre-fire boost solenoid valve 19, the one-way valve 20, the oxygen box boost adapter 5, and the oxygen box energy dissipator 6 to boost the oxygen box 1 before firing.

[0056] 30s after the power system test ignition (second set time), the oxygen tank is ground pressure replenished. The ground pressure replenishment is divided into two ways, such as Figure 1 and Figure 4 As shown:

[0057] One path of ground pressure replenishment is as follows: the ground helium source 12 passes through the filter 13, the pressure reducing valve 14, the tee 15, the first helium flowmeter 16, the pressure replenishment solenoid valve 17, the first-stage tail end plug-in connector 18, the pre-fire boost solenoid valve 19, the one-way valve 20, the pre-fire boost pipeline 21, the oxygen box boost adapter 5, and the oxygen box energy dissipator 6 to replenish the oxygen box 1 with ground pressure.

[0058] Another ground pressure replenishment route is: the ground helium source 12 is passed through the filter 13, the pressure reducing valve 14, the tee 15, the second helium flowmeter 22, the second pressure replenishment solenoid valve 23, the oxygen box charging interface 24, the oxygen box charging switch 25, the oxygen box charging pipeline 26, the oxygen box booster adapter 5, and the oxygen box energy dissipator 6 to replenish the oxygen box 1 with ground pressure.

[0059] like Figure 7 As shown, P min is the minimum air pillow pressure required by the engine, P1 is the opening threshold of the pre-fire boost solenoid valve, P2 is the closing threshold of the pre-fire boost solenoid valve, when the air pillow pressure P0 of oxygen tank 1 is lower than P1, the pre-fire boost solenoid valve will be opened, when the air pillow pressure P0 of oxygen tank 1 is higher than P2, the pre-fire boost solenoid valve will be closed.

[0060] In order to ensure timely detection of the air pillow pressure of the oxygen tank 1 and sending of the pressure data, after the power system test run is ignited, the oxygen tank air pillow pressure sensor 10 detects the air pillow pressure of the oxygen tank 1 and sends the pressure data to the oxygen tank boost controller 11. After making a decision, the oxygen tank boost controller 11 controls the opening and closing of the pre-fire boost solenoid valve 19, thereby controlling the air pillow pressure of the oxygen tank 1.

[0061] Before the power system test run and ignition, the oxygen tank is pressurized before firing, specifically including: the helium from the ground helium source 12 passes through the filter 13, the pressure reducing valve 14, the three-way valve 15, the first helium flowmeter 16, the pressure replenishing solenoid valve 17, the first-stage tail end plug-in connector 18, the pre-fire boost solenoid valve 19, the one-way valve 20, the oxygen tank boost adapter 5, and the oxygen tank energy dissipator 6 to boost the oxygen tank 1 before firing.

[0062] When the second set time is reached after the test ignition, the oxygen box air pillow pressure sensor 10 is used to detect the air pillow pressure of the oxygen box 1, and the pressure data is sent to the oxygen box boost controller 11. The oxygen box boost controller 11 controls the air pillow pressure of the oxygen box 1 by controlling the opening and closing of the pre-fire boost solenoid valve 19.

[0063] The above technical solution has the following advantages:

[0064] The boosting pressure system of the embodiment of the present invention has fewer types and quantities of valves, fewer pipes, and shorter lengths. The entire on-arrow boosting pressure system is relatively simple. The pre-launch boosting solenoid valve in the boosting pressure system not only plays the role of pre-launch boosting of the oxygen box before the power system test ignition, but also plays the role of logical control of the ground boosting pressure system of the oxygen box after the power system test ignition.

[0065] The embodiment of the present invention uses a simple pre-shooting boost solenoid valve for multiple functions, thereby simplifying the ground pressure replenishment system.

[0066] The embodiment of the present invention provides a control logic of a pre-fire pressurization and pressure compensation system of a power system test oxygen box, and describes the opening and closing curves of the solenoid valve and the control decision logic.

[0067] The ground pressure replenishing system of the embodiment of the present invention only uses two pressure replenishing solenoid valves to solve the pressure replenishing problem of the oxygen tank during the power system test run, and the two ground pressure replenishing solenoid valves are not controlled by the air pillow pressure of the oxygen tank, avoiding the connection cable between the oxygen tank boost controller and the ground pressure replenishing solenoid valve to control the pressure replenishing solenoid valve, which not only simplifies the hardware facilities such as electrical, electrical cables, and cable connectors, but also omits the work of research, design, production, processing, laying, fixing, and installation of ground cables, while simplifying the oxygen tank pressure replenishing control system.

[0068] The pressure replenishment system of the embodiment of the present invention is a two-way pressure replenishment system, which increases the pressure replenishment flow rate and avoids the situation where the pressure replenishment capacity is insufficient during the power system test run due to too small a pressure replenishment flow rate.

[0069] The embodiment of the present invention adds a helium flowmeter to the oxygen box ground pressure replenishment system, which can accurately measure the oxygen box ground pressure replenishment flow, and provide raw data for the oxygen box boost and pressure replenishment analysis after the power system test. The boost and pressure replenishment system device is relatively simple, with a single type of valves and pipelines and a small number. The research and development difficulty is low, and the processing and production cycle is short.

[0070] The present invention provides a method for increasing pressure during a test run of an oxygen box power system. Figure 8 As shown, specifically including:

[0071] S1: Before the test ignition, the oxygen tank 1 is pressurized before firing, the first pressure-compensating solenoid valve K2 is opened, the second pressure-compensating solenoid valve K3 is closed, and the pre-fire pressurization solenoid valve 19 is opened or closed according to the oxygen tank air pillow pressure;

[0072] Power system test run pre-ignition pre-fire boost process:

[0073] Before the power system test ignition is called 0 seconds, the oxygen box needs to be pressurized before firing, and the pre-fire pressurization pipeline 21 is not connected to the engine. During the pre-fire pressurization, the ground helium source 12 is pressurized before firing the oxygen box through the filter 13, the pressure reducing valve 14, the three-way 15, the first helium flowmeter 16, the first pressure-compensating solenoid valve K2, the first-stage tail plug-in connector 18, the pre-fire pressurization solenoid valve 19, the one-way valve 20, the pre-fire pressurization pipeline 21, the oxygen box pressurization adapter 5, and the oxygen box energy dissipator 6. P1 is the opening threshold of the pre-fire pressurization solenoid valve, and P2 is the closing threshold of the pre-fire pressurization solenoid valve. When the air pillow pressure P0 of the oxygen box 1 is lower than P1, the pre-fire pressurization solenoid valve is opened, and when the air pillow pressure P0 of the oxygen box 1 is higher than P2, the pre-fire pressurization solenoid valve is closed. When P2≥P0>P1, the previous state of the pre-fire pressurization solenoid valve K1 is maintained, the first pressure-compensating solenoid valve K2 is opened, and the second pressure-compensating solenoid valve K3 is closed.

[0074] S2: 0 to 30 seconds after the test ignition, close the first pressure-compensating solenoid valve K2, close the second pressure-compensating solenoid valve K3, close the pre-launch boost solenoid valve K1, and boost the oxygen tank 1 through the oxygen self-generated boost pipeline 4; after the power system test ignition, the oxygen tank on-arrow boost is oxygen self-generated boost. The high-temperature oxygen passes through the oxygen self-generated boost heater 3, the oxygen self-generated boost pipeline 4, the oxygen tank boost adapter 5, and the oxygen tank energy dissipator 6 to provide the oxygen tank 1 with oxygen self-generated boost.

[0075] The process of boosting after the power system test run and ignition:

[0076] The oxygen self-generating pressurization pipeline 4 is connected to the engine and the whole process is carried out after 0 seconds. After the power system test ignition, the oxygen box arrow pressurization is oxygen self-generating pressurization. The high-temperature oxygen is fed to the oxygen box through the oxygen self-generating pressurization heater 3, the oxygen self-generating pressurization pipeline 4, the oxygen box pressurization adapter 5, and the oxygen box energy dissipator 6 for oxygen self-generating pressurization.

[0077] Power system test run without pressure replenishment process after ignition:

[0078] like Figure 5 , Figure 6 As shown, the horizontal axis is the test ignition time, and the vertical axis is the opening or closing state of the solenoid valve. When the vertical axis is 0, the corresponding solenoid valve is closed; when the vertical axis is 1, the corresponding solenoid valve is opened;

[0079] Before the test ignition, the oxygen tank 1 is pressurized before firing, the first pressure-compensating solenoid valve K2 is opened, the second pressure-compensating solenoid valve K3 is closed, and the pre-fire pressurization solenoid valve K1 is opened or closed according to the oxygen tank air pillow pressure;

[0080] When the power system is tested and ignited within 0s to 30s, the oxygen tank does not perform ground pressure replenishment. At this time, the first pressure replenishment solenoid valve K2 and the second pressure replenishment solenoid valve K3 are both kept closed, and the pre-fire boost solenoid valve K1 is kept closed.

[0081] 30 seconds after the test ignition, the oxygen self-generating pressurization pipeline 4 is kept to pressurize the oxygen tank 1, the first pressure-compensating solenoid valve K2 is opened, and the second pressure-compensating solenoid valve K3 is opened.

[0082] Power system test run and ignition after pressure replenishment process:

[0083] S3: 30 seconds after the power system test ignition, the oxygen tank is ground pressure replenished, and the ground pressure replenishment is divided into two ways. The first pressure replenishment solenoid valve K2 is opened, and the second pressure replenishment solenoid valve K3 is opened.

[0084] One path of ground pressure replenishment is as follows: the ground helium source 12 passes through the filter 13, the pressure reducing valve 14, the tee 15, the first helium flowmeter 16, the first pressure replenishment solenoid valve K2, the first-stage tail end plug-in connector 18, the pre-fire boost solenoid valve K1, the one-way valve 20, the pre-fire boost pipeline 21, the oxygen box boost adapter 5, and the oxygen box energy dissipator 6 to replenish the oxygen box with ground pressure.

[0085] Another ground pressure replenishment route is: the ground helium source 12 is passed through the filter 13, the pressure reducing valve 14, the tee 15, the second helium flowmeter 22, the second pressure replenishment solenoid valve K3, the oxygen box charging interface 24, the oxygen box charging switch 25, the oxygen box charging pipeline 26, the oxygen box booster adapter 5, and the oxygen box energy dissipator 6 to replenish the oxygen box with ground pressure.

[0086] After the power system test run is ignited, the oxygen box air pillow pressure sensor 10 detects the air pillow pressure of the oxygen box 1 and sends the pressure data to the oxygen box boost controller 11. The oxygen box boost controller 11 makes a decision and controls the opening and closing of the pre-fire boost solenoid valve 19, thereby controlling the air pillow pressure of the oxygen box 1. At this time, when P2≥P0>P1, the previous state of the pre-fire boost solenoid valve K1 is maintained, the first boost solenoid valve K2 is opened, and the second boost solenoid valve K3 is opened.

[0087] The boosting and pressure-replenishing system of the present invention has fewer types and quantities of valves, fewer pipelines, and shorter lengths. The entire on-arrow boosting and pressure-replenishing system is relatively simple. The pre-launch boosting solenoid valve in the boosting and pressure-replenishing system not only plays the role of pre-launch boosting of the oxygen box before the power system test run and ignition, but also plays the role of logical control of the ground pressure-replenishing system of the oxygen box after the power system test run and ignition. The invention uses a simple pre-launch boosting solenoid valve for multiple functions. By using the pre-launch boosting solenoid valve for multiple functions, the ground pressure-replenishing system is simplified. The present invention provides the control logic of the pre-launch boosting and pressure-replenishing system of the power system test run oxygen box, and explains the opening and closing curves and control decision logic of the solenoid valve. The ground pressure-compensating system of the present invention uses only two pressure-compensating solenoid valves to solve the pressure-compensating problem of the oxygen box during the power system test run, and the two ground pressure-compensating solenoid valves are not controlled by the air pillow pressure of the oxygen box, avoiding the oxygen box boost controller and the ground pressure-compensating solenoid valve connecting the cable to control the pressure-compensating solenoid valve, which not only simplifies the hardware facilities such as electrical, cable, and cable connectors, but also omits the work of ground cable research and design, production and processing, laying, fixing, and installation, and simplifies the oxygen box pressure-compensating control system. The pressure-compensating system of the present invention is a two-way pressure-compensating system, which increases the pressure-compensating flow rate and avoids the situation where the pressure-compensating capacity is insufficient during the power system test run due to the small pressure-compensating flow rate. Adding a helium flowmeter to the oxygen box ground pressure-compensating system can accurately measure the oxygen box ground pressure-compensating flow rate, and provide original data for the oxygen box boost-compensating analysis after the power system test run. The boost-compensating system is relatively simple, and the types of valves and pipelines are single and the number is small. The research and development difficulty is low, and the processing and production cycle is short.

[0088] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0089] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0090] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined in this application may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given in this application, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0091] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described in this application are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0092] Those skilled in the art may also understand that the various illustrative logical blocks, units, and steps listed in the embodiments of the present invention may be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly demonstrate the interchangeability of hardware and software, the various illustrative components, units, and steps described above have generally described their functions. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present invention.

[0093] The various illustrative logic blocks or units described in the embodiments of the present invention can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination of the above. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0094] The steps of the method or algorithm described in the embodiments of the present invention can be directly embedded in hardware, a software module executed by a processor, or a combination of the two. The software module can be stored in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or other storage media of any form in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a user terminal. Optionally, the processor and the storage medium can also be arranged in different components in the user terminal.

[0095] In one or more exemplary designs, the above functions described in the embodiments of the present invention can be implemented in hardware, software, firmware or any combination of the three. If implemented in software, these functions can be stored on a computer-readable medium, or transmitted in the form of one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media that facilitate the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by any general or special computer. For example, such computer-readable media can include but are not limited to RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program codes in the form of instructions or data structures and other forms that can be read by general or special computers, or general or special processors. In addition, any connection can be appropriately defined as a computer-readable medium, for example, if the software is transmitted from a website site, server or other remote resource through a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wirelessly, such as infrared, wireless and microwave, it is also included in the defined computer-readable medium. The disk and disc include compact disk, laser disk, optical disk, DVD, floppy disk and blue-ray disk. Disks usually copy data magnetically, while discs usually copy data optically with lasers. The above combination can also be included in computer readable media.

[0096] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oxygen box power system test boost pressure system, characterized in that: include: Pre-launch pressurization pipeline (21), oxygen box charging pipeline (26), oxygen self-generating pressurization pipeline (4); The pre-injection pressurization pipeline (21), the oxygen box charging pipeline (26) and the oxygen self-generated pressurization pipeline (4) are all connected to the oxygen box (1) via an oxygen box pressurization adapter (5); The oxygen box charging pipeline (26) is provided with a second helium flow meter (22), a second pressure compensation solenoid valve (23) and an oxygen box charging switch (25) in sequence; One end of the oxygen self-generating pressurizing pipeline (4) is connected to the engine (2), and the other end of the oxygen self-generating pressurizing pipeline (4) is connected to the oxygen box (1) via the oxygen box pressurizing adapter (5); The pre-shooting pressurization pipeline (21) is provided with a three-way valve (15), a first helium flowmeter (16), a first pressure compensation solenoid valve (17), a pre-shooting pressurization solenoid valve (19) and a one-way valve (20) in sequence; the three ports of the three-way valve (15) are respectively connected to the first helium flowmeter (16), the second helium flowmeter (22) and the ground helium source (12); The oxygen box boost controller (11) is connected to the pre-injection boost solenoid valve (19) by signal; The oxygen box pressurization adapter (5) is connected to an oxygen box energy dissipator (6), and the oxygen box energy dissipator (6) is arranged at the top end of the interior of the oxygen box (1).

2. The oxygen box power system test boost pressure system according to claim 1, characterized in that: The ground helium source (12) is connected to a filter (13), the filter (13) is connected to a pressure reducing valve (14), and the pressure reducing valve (14) is connected to the three-way valve (15).

3. The oxygen box power system test boost pressure system according to claim 1, characterized in that: The oxygen box (1) is provided with an oxygen box exhaust valve (7), an oxygen box safety valve (8) and an oxygen box pressure measuring tube (9).

4. The oxygen box power system test boost pressure system according to claim 3, characterized in that: The oxygen box pressure measuring tube (9) is connected to an oxygen box air pillow pressure sensor (10), and the oxygen box air pillow pressure sensor (10) is signal-connected to an oxygen box boost controller (11).

5. The oxygen box power system test boost pressure system according to claim 1, characterized in that: The first pressure-compensating solenoid valve (17) is connected to the pre-fire pressure-boosting solenoid valve (19) via a first-stage tail-end plug-in connector (18).

6. A method for increasing pressure during a test run of an oxygen box power system, using the oxygen box power system test increase pressure system as claimed in claim 1, characterized in that: The following steps are involved: Before the test ignition, the oxygen box (1) is pressurized before firing, the first pressure-compensating solenoid valve (17) is opened, the second pressure-compensating solenoid valve (23) is closed, and the pre-fire pressurization solenoid valve (19) is opened or closed according to the oxygen box air pillow pressure; At a first set time after the test ignition, the first pressure-compensating electromagnetic valve (17) is closed, the second pressure-compensating electromagnetic valve (23) is closed, the pre-fire boosting electromagnetic valve (19) is closed, and the oxygen tank (1) is pressurized through the oxygen self-generating boosting pipeline (4); When the second set time is reached after the test ignition, the oxygen self-generated pressurization pipeline (4) is maintained to pressurize the oxygen box (1), the first pressure-compensating solenoid valve (17) is opened, and the second pressure-compensating solenoid valve (23) is opened; the pre-fire pressurization solenoid valve (19) is opened or closed according to the oxygen box air pillow pressure; When the second set time is reached after the test ignition, the oxygen box air pillow pressure sensor (10) is used to detect the air pillow pressure of the oxygen box (1), and the pressure data is sent to the oxygen box boost controller (11). The oxygen box boost controller (11) controls the air pillow pressure of the oxygen box (1) by controlling the opening and closing of the pre-fire boost solenoid valve (19).

7. A method for increasing pressure during test run of an oxygen box power system according to claim 6, characterized in that: The ground helium source (12) is connected to a filter (13), the filter (13) is connected to a pressure reducing valve (14), and the pressure reducing valve (14) is connected to the three-way valve (15); the first pressure supplement solenoid valve (17) is connected to the pre-injection pressure boosting solenoid valve (19) via a first-stage tail end plug-in connector (18); The method of pre-fire pressurizing the oxygen box (1) before the test ignition specifically includes: The helium of the ground helium source (12) is controlled to pass through a filter (13), a pressure reducing valve (14), a three-way valve (15), a first helium flow meter (16), a first pressure compensation electromagnetic valve (17), a first-stage tail end plug-in connector (18), a pre-launch pressurization electromagnetic valve (19), a one-way valve (20), an oxygen box pressurization adapter (5), and an oxygen box energy dissipator (6) in sequence to supply the oxygen box (1) with pre-launch pressurization.

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