Metal film box type low-temperature pressure accumulator for carrier rocket

Abstract

The invention relates to the technical field of aerospace, in particular to a metallic diaphragm type low-temperature pressure accumulator for a carrier rocket, which comprises a pressure accumulator shell, the pressure accumulator shell comprises a multi-way and a plurality of sealing shells, the multi-way is provided with a plurality of interfaces, and the sealing shells are arranged in the multi-way. Any two opposite connectors in the multiple connectors are an inlet and an outlet used for being connected with a carrier rocket low-temperature propellant conveying pipeline, the sealing shells are arranged at the other connectors in the multiple connectors correspondingly, and a pressure adjusting cavity is formed in the inner space of each sealing shell. The metal film box assembly is arranged in the pressure regulating cavity; and the pressure regulating assembly is communicated with the metal film box assembly and is used for regulating the internal pressure of the metal film box assembly. The low-temperature pressure accumulator has the effects that the stability and reliability of the low-temperature pressure accumulator are improved, and vibration suppression requirements under different conditions are met.

Description

Technical Field

[0001] The present application relates to the technical field of aerospace, and in particular to a metal diaphragm box type cryogenic accumulator for a launch vehicle. Background Art

[0002] As an important part of the propellant delivery system of launch vehicles, accumulators play a key role in ensuring the reliability of rocket flight. In the current technological development process, accumulators are not only used to store energy to cope with instantaneous high-pressure requirements, but also to suppress the longitudinal coupling vibration of the rocket to improve the stability and reliability of the rocket during flight. With the increase in the number of launch vehicles and the upgrading of technological requirements, higher requirements are placed on the design and performance of accumulators.

[0003] In the existing accumulator design, an annular diaphragm structure is usually used to achieve longitudinal coupling vibration suppression. The annular diaphragm structure is usually composed of a single layer or multiple layers of film and is installed at a specific position of the rocket delivery pipeline. Although the existing accumulator uses an annular diaphragm to suppress vibration to a certain extent, due to the pressure of the rocket delivery pipeline, the annular diaphragm assembly is easily pressed and loses its vibration suppression effect, resulting in reduced stability during rocket flight. In addition, the traditional annular diaphragm structure cannot adjust the internal inflation pressure and is difficult to adapt to the vibration suppression requirements under different conditions. Summary of the invention

[0004] In order to improve the stability and reliability of the cryogenic accumulator and meet the vibration suppression requirements under different conditions, the present application provides a metal diaphragm box type cryogenic accumulator for a launch vehicle.

[0005] The present application provides a metal diaphragm box type cryogenic accumulator for a launch vehicle using the following technical solution: A metal diaphragm box type cryogenic accumulator for a launch vehicle comprises an accumulator housing, wherein the accumulator housing comprises a multi-way and a plurality of sealing shells, wherein the multi-way has a plurality of interfaces, wherein two upper and lower opposite interfaces among the plurality of interfaces are an inlet and an outlet for connecting to a cryogenic propellant delivery pipeline of the launch vehicle, and the sealing shells are respectively arranged at the remaining interfaces among the plurality of interfaces, wherein the internal space of the sealing shell forms a pressure regulating chamber; a metal diaphragm box assembly, wherein the metal diaphragm box assembly is arranged in the pressure regulating chamber; and a pressure regulating assembly, wherein the pressure regulating assembly is connected to the metal diaphragm box assembly and is used for regulating the internal pressure of the metal diaphragm box assembly.

[0006] By adopting the above technical solution, the metal diaphragm box assembly is located in the pressure regulating chamber, and the pressure regulating assembly is connected thereto to adjust the internal pressure of the metal diaphragm box assembly to ensure that the metal diaphragm box assembly can play a vibration reduction role at a certain pressure state.

[0007] Optionally, the metal diaphragm box assembly comprises a diaphragm box, one end of the diaphragm box is connected to an end of the sealing shell away from the multi-way, and the other end of the diaphragm box is provided with a guide cover.

[0008] By adopting the above technical solution, when the pressure of the pressure medium in the diaphragm box changes, the diaphragm box will deform accordingly. Through the expansion and contraction movement of the diaphragm box, the pressure change can be accurately converted into mechanical displacement, thereby achieving vibration suppression under different pressure conditions.

[0009] Optionally, the diaphragm box includes a plurality of diaphragm groups capable of elastically expanding and contracting along the axial direction of the diaphragm box, and the diaphragm group includes two oppositely arranged annular metal diaphragms capable of axial elastic expansion and contraction.

[0010] By adopting the above technical solution, multiple diaphragm boxes that can elastically expand and contract along their own axial direction enable the metal diaphragm box assembly to expand and contract according to changes in internal inflation pressure. The design of the annular metal diaphragm ensures that the diaphragm box still maintains good sealing and elasticity under different pressures, thereby improving the working reliability and service life of the accumulator.

[0011] Optionally, a guide frame is provided inside the sealing shell near the multi-channel position, a guide hole is provided on the guide frame, and a guide rod matching the guide hole is provided on a side of the guide cover away from the membrane box.

[0012] By adopting the above-mentioned technical solution, the guide frame and the guide holes thereon arranged near the multi-way position inside the sealing shell cooperate with the guide rod arranged on the guide cover, which can provide precise guiding effect during the operation of the metal diaphragm box assembly, ensure the stable extension and contraction of the diaphragm box, avoid displacement or skew, thereby improving the overall reliability and stability of the accumulator.

[0013] Optionally, the pressure regulating assembly includes an inflation valve and a pipe connection nozzle, wherein the pipe connection nozzle is disposed at an end of the sealing shell away from the multi-way and is connected to the interior of the metal diaphragm box assembly, and the inflation valve is connected to the pipe connection nozzle via a conduit tube group.

[0014] By adopting the above technical solution, the pressure regulating assembly composed of the inflation valve and the nozzle can realize the inflation and deflation of the metal diaphragm box assembly, and then adjust the internal pressure, ensuring that the metal diaphragm box assembly can work effectively under different vibration suppression requirements, thereby improving the longitudinal coupling vibration suppression effect of the launch vehicle.

[0015] Optionally, the pressure regulating assembly further includes a pressure sensor, and the pressure sensor is connected to any of the pipe nozzles via a conduit tube set.

[0016] By adopting the above technical solution, the pressure sensor realizes real-time monitoring of the internal pressure of the metal diaphragm box assembly, ensuring that the inflation pressure is maintained within the required range, thereby improving the reliability and stability of the accumulator operation.

[0017] Optionally, the charging valve is fixed to the accumulator housing via a thermal insulation pad, and the pressure sensor is fixed to the accumulator housing via a thermal insulation bracket.

[0018] By adopting the above technical solution, effective fixation and thermal insulation protection of the inflation valve and the pressure sensor are achieved, ensuring the reliability of the inflation valve and the pressure sensor in a low-temperature environment.

[0019] Optionally, the sealing shell and the multi-way are sealed by a low-temperature seal, and the catheter tube set and the inflation valve, the pressure sensor and the take-over nozzle are sealed by a low-temperature seal.

[0020] By adopting the above technical solution, reliable sealing between the internal components of the accumulator is achieved, leakage of cryogenic propellant during transportation is prevented, the overall sealing performance and safety of the accumulator are improved, and stable operation of the system in a low-temperature environment is ensured.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. A certain pressure of gas medium is filled into the metal diaphragm assembly through the inflation valve, and the internal pressure is monitored by the pressure sensor, so that the metal diaphragm assembly can effectively suppress the longitudinal coupling vibration of the launch vehicle, thereby improving the stability and reliability of the rocket during flight; 2. The pressure regulating assembly is connected to the metal diaphragm assembly, which can adjust the internal pressure of the metal diaphragm assembly to meet the vibration suppression requirements under different working conditions; 3. A guide frame is provided inside the sealing shell. The cooperation between the guide hole and the guide rod ensures the smooth movement of the guide cover, thus enhancing the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a metal diaphragm box type cryogenic accumulator for a launch vehicle provided in an embodiment of the present application; Figure 2 It is a schematic diagram of the internal structure of a metal diaphragm box type cryogenic accumulator for a launch vehicle provided in an embodiment of the present application.

[0023] Explanation of the reference numerals: 1-multi-way; 101-upper interface; 102-lower interface; 103-left interface; 104-right interface; 105-front interface; 2-sealing shell; 3-diaphragm box; 301-diaphragm group; 3011-annular metal diaphragm; 4-guide cover; 401-guide rod; 5-guide frame; 501-guide hole; 6-inflating valve; 7-take-off nozzle; 8-pressure sensor; 9-pressure regulating conduit; 10-pressure measuring conduit; 11-four-way; 12-connecting conduit; 13-left conduit; 14-right conduit; 15-low-temperature seal. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 This application is described in further detail.

[0025] The embodiment of the present application discloses a metal diaphragm box type cryogenic accumulator for a launch vehicle.

[0026] like Figure 1 and Figure 2 As shown, the metal diaphragm box type cryogenic accumulator used in the launch vehicle includes an accumulator housing, which is composed of a multi-pass 1 and a plurality of sealed shells 2. The multi-pass 1 has a plurality of interfaces. In the present embodiment, the multi-pass 1 has five interfaces, namely an upper interface 101, a lower interface 102, a left interface 103, a right interface 104 and a front interface 105. Among the multiple interfaces of the multi-pass 1, any two relative interfaces are designed as an air inlet interface and an air outlet interface so as to be connected to the cryogenic propellant delivery pipeline of the launch vehicle. In the present embodiment, the upper interface 101 is an air outlet interface, and the lower interface 102 is an air inlet interface. The remaining interfaces, namely the left interface 103, the right interface 104 and the front interface 105, are provided with a sealed shell 2, and the internal space of the sealed shell 2 forms a pressure regulating chamber. The metal diaphragm assembly is placed in the pressure regulating chamber, and the pressure regulating assembly is connected to the metal diaphragm assembly and is responsible for regulating the pressure inside the metal diaphragm assembly. By connecting the pressure regulating assembly with the metal diaphragm assembly, it can be ensured that the metal diaphragm assembly can perform its vibration reduction function under a specific pressure state.

[0027] like Figure 2As shown, specifically, the metal diaphragm box assembly includes a diaphragm box 3, one end of which is connected to the end of the sealing shell 2 away from the multi-way 1, and the other end is provided with a guide cover 4. The diaphragm box 3 contains a plurality of diaphragm groups 301 (some of the diaphragm groups 301 are not shown in the figure), and these diaphragm groups 301 can elastically expand and contract along the axial direction thereof. Each diaphragm group 301 is composed of two annular metal diaphragms 3011 arranged opposite to each other, and the annular metal diaphragms 3011 have the characteristics of axial elastic expansion and contraction. When the pressure medium pressure inside the diaphragm box 3 changes, the diaphragm box 3 will deform accordingly. Through the expansion and contraction movement of the diaphragm box 3, the pressure change can be accurately converted into mechanical displacement, thereby realizing the vibration suppression function under different pressure conditions. The elastic expansion and contraction ability of the plurality of diaphragm groups 301 enables the metal diaphragm box assembly to be adjusted accordingly according to the change of the internal inflation pressure. The two annular metal diaphragms 3011 of the diaphragm group 301 are welded and connected to each other, thereby ensuring that the diaphragm box 3 still maintains excellent sealing performance and elasticity under different pressure conditions, thereby improving the working reliability of the accumulator and extending the service life.

[0028] like Figure 1 and Figure 2 As shown, in order to ensure that the metal diaphragm box assembly obtains accurate guidance during operation, a guide frame 5 is configured at a position near the multi-channel 1 inside the sealing shell 2, and a guide hole 501 is provided on the guide frame 5. At the same time, a guide rod 401 matching the guide hole 501 is provided on the side away from the diaphragm box 3 of the guide cover 4. The guide frame 5 and its guide hole 501 cooperate with the guide rod 401 on the guide cover 4 to provide accurate guiding function when the metal diaphragm box assembly is in operation, ensure the stable expansion and contraction of the diaphragm box 3, prevent it from being offset or skewed, and thus improve the overall reliability and stability of the accumulator.

[0029] like Figure 1As shown, the pressure regulating assembly includes a charging valve 6, a pressure sensor 8 and a take-over nozzle 7. The take-over nozzle 7 is arranged at one end of the sealing shell 2 away from the multi-way 1 and is connected to the inside of the metal diaphragm box assembly. The charging valve 6 is connected to the take-over nozzle 7 through a conduit tube set. At the same time, the charging valve 6 is fixed to the accumulator housing through an insulating pad, and the pressure sensor 8 is fixed to the accumulator housing through an insulating bracket. In this embodiment, there are three take-over nozzles 7, which are respectively arranged on three sealing shells 2. The charging valve 6 is fixed to the sealing shell 2 corresponding to the front interface 105 through an insulating pad, and the pressure sensor 8 is also fixed to the sealing shell 2 corresponding to the front interface 105 through an insulating bracket. Specifically, the conduit tube set includes a pressure regulating conduit 9, a pressure measuring conduit 10, a four-way 11, a connecting conduit 12, a left-direction conduit 13 and a right-direction conduit 14. The four interfaces of the four-way 11 are respectively connected to the pressure regulating conduit 9, the pressure measuring conduit 10, the connecting conduit 12 and the conduit nozzle at the sealing shell 2 corresponding to the front interface 105, the other end of the pressure regulating conduit 9 is connected to the inflation valve 6, the other end of the pressure measuring conduit 10 is connected to the pressure sensor 8, and the other end of the connecting conduit 12 is connected to any one of the interfaces of the three-way. The remaining two interfaces of the three-way are respectively connected to the left conduit 13 and the right conduit 14, the other end of the left conduit 13 is connected to the conduit nozzle at the sealing shell 2 corresponding to the left interface 103, and the other end of the right conduit 14 is connected to the conduit nozzle at the sealing shell 2 corresponding to the right interface 104.

[0030] The pressure regulating assembly composed of the inflation valve 6 and the nozzle 7 is responsible for realizing the inflation and deflation operations inside the metal diaphragm assembly, thereby adjusting its internal pressure. This ensures the effective operation of the metal diaphragm assembly in response to different vibration suppression requirements, thereby improving the suppression efficiency of the longitudinal coupled vibration of the launch vehicle. The pressure sensor 8 is responsible for real-time monitoring of the internal pressure of the metal diaphragm assembly to ensure that the inflation pressure is maintained within the established demand range, thereby enhancing the reliability and stability of the accumulator. The insulating pad and the insulating bracket are responsible for the firm fixation and thermal insulation protection of the inflation valve 6 and the pressure sensor 8, ensuring the stable performance of the inflation valve 6 and the pressure sensor 8 in a low temperature environment.

[0031] like Figure 2 As shown, in order to achieve reliable sealing between the various components inside the accumulator, the sealing shell 2 and the multi-way 1 are sealed by a low-temperature seal 15, and the conduit tube group and the charging valve 6, the pressure sensor 8 and the nozzle 7 are sealed by a low-temperature seal 15. The low-temperature seal 15 can be an ultra-low-temperature rubber seal ring or a fluororubber seal ring. The low-temperature seal 15 can prevent the low-temperature propellant from leaking during the transportation process, improve the overall sealing performance and safety of the accumulator, and ensure the stable operation of the system in a low-temperature environment.

[0032] The implementation principle of a metal diaphragm type cryogenic accumulator for a launch vehicle in the embodiment of the present application is: by precisely controlling the pressure inside the metal diaphragm assembly, the longitudinal coupling vibration of the launch vehicle can be effectively suppressed. The metal diaphragm assembly performs telescopic movement in the accumulator housing, and the mechanical displacement conversion of the pressure change is realized through the multiple diaphragm groups 301 inside it. The pressure regulating assembly is responsible for regulating the pressure inside the metal diaphragm assembly to ensure that it performs the vibration reduction function under a specific pressure state.

[0033] In addition, the use of the cryogenic seal 15 effectively prevents leakage of cryogenic propellant and improves the safety of the system. The provision of the thermal insulation pad and the thermal insulation bracket ensures the stable performance of the inflation valve 6 and the pressure sensor 8 in a low temperature environment, thereby ensuring the reliability and stability of the accumulator.

[0034] During the launch of the launch vehicle, the metal diaphragm type cryogenic accumulator can be quickly inflated and deflated according to actual needs, and the internal pressure can be adjusted to effectively suppress the longitudinal coupling vibration. The pressure sensor 8 monitors the pressure inside the metal diaphragm assembly in real time to ensure that it is maintained within the established demand range. The precise control of the pressure regulating assembly enables the accumulator to operate stably under different vibration suppression requirements, thereby improving the overall performance of the launch vehicle.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A metal diaphragm type cryogenic accumulator for a launch vehicle, characterized in that: include: An accumulator housing, the accumulator housing comprising a multi-port (1) and a plurality of sealed shells (2), the multi-port (1) having a plurality of interfaces, any two opposite interfaces among the plurality of interfaces being an inlet and an outlet for connecting to a cryogenic propellant delivery pipeline of a launch vehicle, the sealed shells (2) being respectively arranged at the remaining interfaces among the plurality of interfaces, and the internal space of the sealed shells (2) forming a pressure regulating chamber; A metal diaphragm box assembly, wherein the metal diaphragm box assembly is arranged in the pressure regulating chamber; A pressure regulating assembly is connected to the metal diaphragm box assembly and is used to regulate the internal pressure of the metal diaphragm box assembly.

2. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 1, characterized in that: The metal diaphragm box assembly comprises a diaphragm box (3), one end of the diaphragm box (3) is connected to an end of the sealing shell (2) away from the multi-channel (1), and the other end of the diaphragm box (3) is provided with a guide cover (4).

3. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 2, characterized in that: The membrane box (3) comprises a plurality of membrane groups (301) capable of elastically expanding and contracting along the axis direction of the membrane group (301), wherein the membrane group (301) comprises two oppositely arranged annular metal membranes (3011) capable of axially elastic expansion and contraction.

4. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 2, characterized in that: A guide frame (5) is provided inside the sealing shell (2) near the multi-channel (1), and a guide hole (501) is provided on the guide frame (5). A guide rod (401) matching with the guide hole (501) is provided on the side of the guide cover (4) away from the membrane box (3).

5. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 2, characterized in that: The pressure regulating assembly comprises an air filling valve (6) and a connecting nozzle (7). The connecting nozzle (7) is arranged at one end of the sealing shell (2) away from the multi-way (1) and is connected to the interior of the metal diaphragm box assembly. The air filling valve (6) is connected to the connecting nozzle (7) through a conduit tube group.

6. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 5, characterized in that: The pressure regulating assembly further comprises a pressure sensor (8), and the pressure sensor (8) is connected to any one of the nozzles (7) via a conduit tube set.

7. The metal diaphragm type cryogenic accumulator for a launch vehicle according to claim 6, characterized in that: The charging valve (6) is fixed to the accumulator housing via a heat-insulating pad, and the pressure sensor (8) is fixed to the accumulator housing via a heat-insulating bracket.

8. The metal diaphragm box type cryogenic accumulator for a launch vehicle according to claim 6, characterized in that: The sealing shell (2) and the multi-port (1) are sealed via a low-temperature seal (15), and the conduit tube assembly and the inflation valve (6), the pressure sensor (8) and the nozzle (7) are sealed via a low-temperature seal (15).

Images