Rocket interstage separation guiding pneumatic push rod

Abstract

The invention discloses a rocket interstage separation guiding pneumatic push rod, and relates to the technical field of spaceflight, and the rocket interstage separation guiding pneumatic push rod comprises a first push rod assembly and a second push rod assembly; the first push rod assembly comprises a base, an outer cylinder and an inner cylinder; one end of the base is communicated with the inflation system, and the other end of the base is connected with one end of the outer cylinder; an outer cylinder inner baffle ring is arranged on the inner side of the other end of the outer cylinder; the inner cylinder comprises an inner cylinder annular plate and an inner cylinder end face, and one end of the inner cylinder annular plate is connected with the inner cylinder end face. The inner cylinder is arranged in the outer cylinder, and the outer side of the inner cylinder annular plate is in sliding connection with the inner side of the outer cylinder; the second push rod assembly comprises a guide bolt, a locking nut, a connecting device and a thrust bracket; after extending, the side, away from the inner cylinder annular plate, of the end face of the inner cylinder is separated from the other end of the base, the other end of the inner cylinder annular plate is in limiting connection with the outer cylinder inner baffle ring, and one end of the guide bolt is separated from the inner cylinder and extends out of the outer cylinder. The pneumatic push rod can be guided by itself, and it can be guaranteed that the postures of the two separated substages are stable.

Description

Technical Field

[0001] The present application relates to the field of aerospace technology, and in particular to a rocket stage separation guide pneumatic push rod. Background Art

[0002] The pneumatic push rod is an important device in the separation of rocket stages. The device is located on both sides of the rocket separation surface. Before separation, compressed gas is filled into the pneumatic push rod. During separation, the rocket separation surface is unlocked and separated. Under the action of compressed gas, the pneumatic push rod is quickly pushed out, so that the sub-stages on both sides of the separation surface instantly gain a certain amount of kinetic energy, achieving the purpose of rapid separation.

[0003] In order to ensure the posture of the two sub-stages after separation and not touch other parts of the rocket, the existing pneumatic push rods need to add additional guide mechanisms inside the rocket. However, adding guide mechanisms will increase the weight of the overall structure. Summary of the invention

[0004] The purpose of the present application is to provide a rocket stage separation guiding pneumatic push rod, which can make the pneumatic push rod self-guided and ensure the stability of the postures of the two sub-stages after separation.

[0005] To achieve the above-mentioned purpose, the present application provides a rocket stage separation guide pneumatic push rod, comprising: a first push rod assembly arranged on the first separation body and a second push rod assembly arranged on the second separation body; wherein the first push rod assembly at least comprises: a base, an outer tube and an inner tube; one end of the base is connected to the inflation system, and the other end of the base is connected to one end of the outer tube; an outer tube inner retaining ring is arranged on the inner side of the other end of the outer tube; the inner tube comprises: an inner tube ring plate and an inner tube end face, one end of the inner tube ring plate is connected to the inner tube end face; the inner tube is arranged in the outer tube, and the outer side of the inner tube ring plate is slidably connected to the inner side of the outer tube, and when the rocket is assembled, the inner tube end face away from the inner tube ring plate is in contact with the other end of the base; the second push rod assembly at least comprises: a guide Pin, locking nut, connecting device and thrust bracket; when the rocket is assembled, one end of the guide pin and the side where the end face of the inner tube is connected to the inner tube ring plate are tightly fitted, and a part of the outer side of the guide pin and the inner side of the inner tube ring plate are tightly fitted; the other end of the guide pin is located outside the other end of the outer tube; the other end of the guide pin is connected to one end of the connecting device, and the other end of the connecting device is connected to the thrust bracket; the locking nut is arranged on the connecting device, and the locking nut is located between the guide pin and the thrust bracket; after the inflation system air supply is extended, the side of the inner tube end face away from the inner tube ring plate is separated from the other end of the base, the other end of the inner tube ring plate is connected to the inner retaining ring of the outer tube, and one end of the guide pin is separated from the inner tube and extends out of the outer tube.

[0006] As above, at least one dynamic sealing ring is provided on the outer side of the inner cylinder.

[0007] As above, the dynamic sealing ring is located outside the inner cylinder ring plate.

[0008] As mentioned above, a docking ring is arranged on the outer side of the base, and after the other end of the base is connected to one end of the outer tube, the one end of the outer tube is also in contact with the docking ring.

[0009] As above, a static sealing ring is arranged on the docking ring, and after the other end of the base is connected to one end of the outer tube, the one end of the outer tube is also in contact with the static sealing ring.

[0010] As above, one end of the outer tube is further provided with a first outer tube outer retaining ring, and after the other end of the base is connected to one end of the outer tube, the first outer tube outer retaining ring contacts the static sealing ring.

[0011] As above, the other end of the base is threadedly connected to one end of the outer tube.

[0012] As above, wherein the connecting device is a threaded device, one end of the threaded device is threadedly connected to the other end of the guide pin, and the other end of the threaded device is threadedly connected to the thrust bracket.

[0013] As above, wherein the locking nut is threadedly connected to the threaded device.

[0014] As above, the gas filled into the first push rod assembly by the inflation system is nitrogen, helium or compressed air.

[0015] The beneficial effects achieved by this application are as follows:

[0016] (1) The rocket stage separation guide pneumatic push rod of the present application can make the pneumatic push rod self-guided, without the need to add an additional guide mechanism inside the rocket, thereby reducing the weight of the overall structure and ensuring that the postures of the two sub-stages are stable after separation and do not touch other parts of the rocket.

[0017] (2) The rocket stage separation and guidance pneumatic push rod of the present application inserts the guide pin of the second push rod assembly into the interior of the first push rod assembly, and can achieve guidance using the outer tube and the inner tube.

[0018] (3) The rocket stage separation guide pneumatic push rod of the present application can be applied not only to the two separation sub-stages of the rocket, but also to other positions of the rocket that need to be separated, such as fairing separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1It is a structural schematic diagram of an embodiment of the rocket stage separation guide pneumatic push rod in a retracted state;

[0021] Figure 2 It is a schematic structural diagram of an embodiment of the rocket stage separation guide pneumatic push rod in the extended state. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-2 As shown, the present application provides a rocket stage separation guide pneumatic push rod, including: a first push rod assembly 1 arranged on a first separation body and a second push rod assembly 2 arranged on a second separation body. Among them, the first push rod assembly 1 at least includes: a base 11, an outer tube 12 and an inner tube 13. One end of the base 11 is connected to the inflation system 3, and the other end of the base 11 is connected to one end of the outer tube 12; an outer tube inner retaining ring 121 is arranged on the inner side of the other end of the outer tube 12. The inner tube 13 includes: an inner tube ring plate 131 and an inner tube end face 132, one end of the inner tube ring plate 131 is connected to the inner tube end face 132; the inner tube 13 is arranged in the outer tube 12, and the outer side of the inner tube ring plate 131 is slidably connected to the inner side of the outer tube 12. When the rocket is assembled, the inner tube end face 132 is away from the inner tube ring plate 131. The side of the other end of the base 11 contacts the inner tube end face 132. The second push rod assembly 2 at least includes: a guide pin 21, a locking nut 22, a connecting device 23 and a thrust bracket 24; when the rocket is assembled, one end of the guide pin 21 and the side where the inner tube end face 132 is connected to the inner tube ring plate 131 are tightly fitted, and a part of the outer side of the guide pin 21 is tightly fitted to the inner side of the inner tube ring plate 131; the other end of the guide pin 21 is located outside the other end of the outer tube 12; the other end of the guide pin 21 is connected to one end of the connecting device 23, and the other end of the connecting device 23 is connected to the thrust bracket 24; the locking nut 22 is arranged on the connecting device 23, and the locking nut 22 is located between the guide pin 21 and the thrust bracket 24; after the inflation system 3 is extended, the inner tube end face 132 is separated from the side of the inner tube ring plate 131 and the other end of the base 11, the other end of the inner tube ring plate 131 is limitedly connected to the inner retaining ring 121 of the outer tube, and one end of the guide pin 21 is separated from the inner tube 13 and extends out of the outer tube 12.

[0024] Specifically, the size of the outer tube 12 (e.g., diameter and length) is larger than the size of the inner tube 13 (e.g., diameter and length). The inner tube 13 is sleeved inside the outer tube 12, which can reduce the external dimensions of the pneumatic push rod structure, and is beneficial to optimizing the rocket structure layout. In addition, reducing the external dimensions of the outer tube 12 and the inner tube 13 into a multi-section form is beneficial to production and processing. The second push rod assembly 2 is installed on one side of the rocket sub-stage, and the guide pin 21 of the second push rod assembly 2 is inserted into the first push rod assembly 1 installed on the other side of the rocket sub-stage. The outer tube 12 and the inner tube 13 can be used for guidance, and the force of the first push rod assembly 1 can be transmitted to the side of the rocket sub-stage where the second push rod assembly 2 is set, thereby ensuring a smooth separation process, and the two sub-stages are stable after separation and do not touch other parts of the rocket.

[0025] Furthermore, one side of the locking nut 22 contacts the other end of the guide pin 21 , and the locking nut 22 increases the structural stability.

[0026] Furthermore, the first separation body is rocket sub-stage 1, and the second separation body is rocket sub-stage 2, but it is not limited to the first separation body being rocket sub-stage 1 and the second separation body being rocket sub-stage 2, and it can also be a separation body at other positions of the rocket that need to be separated, such as fairing separation.

[0027] Furthermore, at least one dynamic sealing ring 133 is disposed on the outer side of the inner cylinder 13 .

[0028] Specifically, the dynamic sealing ring 133 is used to ensure the sealing performance of the inner tube 13 when it moves.

[0029] Furthermore, the specific location of the dynamic sealing ring 133 is determined according to actual conditions. In the present application, it is preferred that the dynamic sealing ring 133 is located outside the inner cylinder ring plate 131 .

[0030] Furthermore, a docking ring 111 is provided on the outer side of the base 11 , and after the other end of the base 11 is connected to one end of the outer tube 12 , the one end of the outer tube 12 is also in contact with the docking ring 111 .

[0031] Specifically, the docking ring 111 can limit the connection position between the outer tube 12 and the base 11 .

[0032] Furthermore, a static sealing ring 112 is provided on the docking ring 111 , and after the other end of the base 11 is connected to one end of the outer tube 12 , the one end of the outer tube 12 is also in contact with the static sealing ring 112 .

[0033] Specifically, the static sealing ring 112 can ensure the sealing of the connection position between the outer tube 12 and the base 11 .

[0034] Furthermore, a first outer tube outer retaining ring 122 is provided at one end of the outer tube 12 . After the other end of the base 11 is connected to one end of the outer tube 12 , the first outer tube outer retaining ring 122 contacts the static sealing ring 112 .

[0035] Furthermore, a second outer cylinder outer retaining ring 123 is provided at the other end of the outer cylinder 12 for easy installation.

[0036] Furthermore, the other end of the base 11 is threadedly connected to one end of the outer tube 12, but is not limited to threaded connection. The present application preferably uses threaded connection for ease of installation, disassembly or replacement.

[0037] Furthermore, the other end of the guide pin 21 is provided with an internal thread.

[0038] Furthermore, the thrust bracket 24 is provided with an internal thread.

[0039] Furthermore, the connecting device 23 is a threaded device, one end of the threaded device is threadedly connected to the other end of the guide pin 21, and the other end of the threaded device is threadedly connected to the thrust bracket 24, but is not limited to a threaded connection. The present application preferably uses a threaded connection for ease of installation, disassembly or replacement.

[0040] Furthermore, the locking nut 22 is threadedly connected to the threaded device, but is not limited to threaded connection. The present application preferably uses threaded connection for ease of installation, disassembly or replacement.

[0041] Furthermore, the locking nut 22 is provided with an internal thread.

[0042] Furthermore, the threaded device is provided with an external thread that is compatible with the internal thread of the guide pin 21 , the internal thread of the thrust bracket 24 , and the internal thread of the locking nut 22 .

[0043] Furthermore, the inflation system 3 is used to provide compressed gas to the first push rod assembly 1 and increase the inflation volume. The gas that the inflation system 3 fills into the first push rod assembly 1 is: nitrogen, helium or compressed air, but is not limited to nitrogen, helium or compressed air, and can also be other working gases.

[0044] The beneficial effects achieved by this application are as follows:

[0045] (1) The rocket stage separation guide pneumatic push rod of the present application can make the pneumatic push rod self-guided, without the need to add an additional guide mechanism inside the rocket, thereby reducing the weight of the overall structure and ensuring that the postures of the two sub-stages are stable after separation and do not touch other parts of the rocket.

[0046] (2) The rocket stage separation and guidance pneumatic push rod of the present application inserts the guide pin of the second push rod assembly into the interior of the first push rod assembly, and can achieve guidance using the outer tube and the inner tube.

[0047] (3) The rocket stage separation guide pneumatic push rod of the present application can be applied not only to the two separation sub-stages of the rocket, but also to other positions of the rocket that need to be separated, such as fairing separation.

[0048] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the scope of protection of the present application is intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application. Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the protection scope of the present application and its equivalent technology, the present application is also intended to include these modifications and variations.

Claims

1. A rocket stage separation guide pneumatic push rod, characterized in that: include: A first push rod assembly disposed on the first separation body and a second push rod assembly disposed on the second separation body; Wherein, the first push rod assembly at least comprises: a base, an outer cylinder and an inner cylinder; One end of the base is connected to the inflation system, and the other end of the base is connected to one end of the outer tube; an outer tube inner retaining ring is arranged on the inner side of the other end of the outer tube; The inner cylinder comprises: an inner cylinder ring plate and an inner cylinder end surface, and one end of the inner cylinder ring plate is connected to the inner cylinder end surface; The inner tube is arranged in the outer tube, and the outer side of the inner tube ring plate is slidably connected to the inner side of the outer tube. When the rocket is assembled, the end face of the inner tube away from the inner tube ring plate contacts the other end of the base. The second push rod assembly at least includes: a guide pin, a locking nut, a connecting device and a thrust bracket; During the final assembly of the rocket, one end of the guide pin is tightly fitted with the end surface of the inner tube and the side where the inner tube ring plate is connected, and a part of the outer side of the guide pin is tightly fitted with the inner side of the inner tube ring plate; The other end of the guide pin is located outside the other end of the outer tube; the other end of the guide pin is connected to one end of the connecting device, and the other end of the connecting device is connected to the thrust bracket; the locking nut is arranged on the connecting device, and the locking nut is located between the guide pin and the thrust bracket; After the inflation system air supply is extended, the end face of the inner cylinder is separated from one side of the inner cylinder ring plate and the other end of the base, the other end of the inner cylinder ring plate is limitedly connected with the inner retaining ring of the outer cylinder, and one end of the guide pin is separated from the inner cylinder and extended out of the outer cylinder.

2. The rocket stage separation guide pneumatic push rod according to claim 1, characterized in that: At least one dynamic sealing ring is arranged on the outer side of the inner cylinder.

3. The rocket stage separation guide pneumatic push rod according to claim 2, characterized in that: The dynamic sealing ring is located on the outside of the inner cylinder ring plate.

4. The rocket stage separation guide pneumatic push rod according to claim 1, characterized in that: A docking ring is arranged on the outer side of the base, and after the other end of the base is connected with one end of the outer tube, the one end of the outer tube is also in contact with the docking ring.

5. The rocket stage separation guide pneumatic push rod according to claim 4, characterized in that: A static sealing ring is arranged on the docking ring, and after the other end of the base is connected with one end of the outer tube, the one end of the outer tube is also in contact with the static sealing ring.

6. The rocket stage separation guide pneumatic push rod according to claim 5, characterized in that: One end of the outer cylinder is also provided with a first outer cylinder outer retaining ring. After the other end of the base is connected to one end of the outer cylinder, the first outer cylinder outer retaining ring contacts the static sealing ring.

7. The rocket stage separation guide pneumatic push rod according to claim 1, characterized in that: The other end of the base is threadedly connected to one end of the outer cylinder.

8. The rocket stage separation guide pneumatic push rod according to claim 1, characterized in that: The connecting device is a threaded device, one end of the threaded device is threadedly connected to the other end of the guide pin, and the other end of the threaded device is threadedly connected to the thrust bracket.

9. The rocket stage separation guide pneumatic push rod according to claim 8, characterized in that: The locking nut is threadedly connected to the threaded device.

10. The rocket stage separation guide pneumatic push rod according to claim 1, characterized in that: The gas filled into the first push rod assembly by the inflation system is nitrogen, helium or compressed air.

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