Recyclable rocket interstage separation pneumatic push rod

Abstract

The invention discloses a recoverable rocket interstage separation pneumatic push rod, and relates to the technical field of spaceflight, the recoverable rocket interstage separation pneumatic push rod comprises a pneumatic push rod arranged on a first separation body and a thrust support arranged on a second separation body; the pneumatic push rod 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; an exhaust pipe is further arranged on the outer cylinder; an inner cylinder outer baffle ring is arranged at one end of the inner cylinder, and an inner cylinder end is arranged at the other end of the inner cylinder; the inner cylinder is arranged in the outer cylinder, and during contraction, the inner cylinder outer baffle ring is in contact with the other end of the base; and after being pushed out, the inner cylinder outer baffle ring and the outer cylinder inner baffle ring are connected in a limiting manner, and the end of the inner cylinder is positioned outside the outer cylinder and is in contact with the thrust bracket, so that separation is realized. After the pneumatic push rod does work, air in the pneumatic push rod and an inflation system can be rapidly exhausted, the separation speed is increased, and safety and reuse of the recovery sublevel are guaranteed.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and in particular to a reusable rocket stage separation aerodynamic push rod. Background Technology

[0002] Pneumatic pushers are crucial components in rocket stage separation. Located on either side of the separation plane, compressed gas is introduced into the pushers before separation. During separation, the separation planes unlock and open, and the pushers, propelled by the compressed gas, rapidly extend, instantly granting the stages on either side of the separation plane kinetic energy for rapid separation.

[0003] After the pneumatic pusher is deployed, there is gas pressure inside the pneumatic pusher and the inflation system. Since the pneumatic pusher is installed on the stage of a reusable rocket, excessively high gas pressure poses a significant risk to the success of recovery.

[0004] In addition, the gas remaining inside the pneumatic actuator and inflation system will also cause some waste. Summary of the Invention

[0005] The purpose of this application is to provide a reusable rocket stage separation pneumatic pusher. After the pneumatic pusher performs work, the exhaust pipe on the pneumatic pusher can quickly vent the gas inside the pneumatic pusher and the gas filling system. The reaction force of the vented gas gives the stages on both sides of the separation surface additional kinetic energy, thereby accelerating the separation speed of the two rocket stages and ensuring the safety and reuse of the recovered stages.

[0006] To achieve the above objectives, this application provides a reusable rocket stage separation pneumatic pusher, comprising at least: a pneumatic pusher mounted on a first separation body and a thrust bracket mounted on a second separation body; wherein the pneumatic pusher comprises at least: a base, an outer cylinder, and an inner cylinder; wherein one end of the base is connected to an inflation system, and the other end of the base is connected to one end of the outer cylinder; an inner retaining ring is provided on the inner side of the other end of the outer cylinder; an exhaust pipe is also provided on the outer cylinder, which is closed when the inflation system supplies gas to perform the separation operation; and opens after the separation operation is completed; an outer retaining ring is provided on one end of the inner cylinder, and an inner cylinder end is provided on the other end of the inner cylinder; the inner cylinder is located inside the outer cylinder, and when it retracts, the outer retaining ring contacts the other end of the base; after the inflation system supplies gas to push it out, the outer retaining ring of the inner cylinder is limited to the inner retaining ring of the outer cylinder, the inner cylinder end is located outside the outer cylinder, and the inner cylinder end contacts the thrust bracket, thereby achieving separation.

[0007] As shown above, a dynamic sealing ring is provided on the outer side of the inner cylinder.

[0008] As shown above, the dynamic sealing ring is located on the outside of the inner cylinder outer retaining ring.

[0009] As shown above, the outer side of the base is provided with a mating ring, and after the other end of the base is connected to one end of the outer cylinder, one end of the outer cylinder is still in contact with the mating ring.

[0010] As shown above, a static sealing ring is provided on the mating ring, and after the other end of the base is connected to one end of the outer cylinder, one end of the outer cylinder is still in contact with the static sealing ring.

[0011] As shown above, the inner cylinder end has an adjustable spherical structure.

[0012] As shown above, the other end of the base is detachably connected to one end of the outer cylinder.

[0013] As shown above, the other end of the base is threaded to one end of the outer cylinder.

[0014] As described above, the exhaust pipe includes a vertical pipe and a horizontal pipe; one end of the vertical pipe is connected to and communicates with the outer cylinder; one end of the vertical pipe is connected to and communicates with one end of the horizontal pipe, and after connection, the vertical pipe and the horizontal pipe have a connection angle; the other end of the horizontal pipe faces the end of the outer cylinder where the inner retaining ring of the outer cylinder is provided.

[0015] As shown above, the connection angle is 90°.

[0016] The beneficial effects achieved by this application are as follows:

[0017] (1) After the reusable rocket stage separation pneumatic pusher of this application performs its work, the exhaust pipe on the pneumatic pusher can quickly vent the gas inside the pneumatic pusher and the gas filling system. The reaction force of the vented gas gives the stages on both sides of the separation surface additional kinetic energy, thereby accelerating the separation speed of the two stages of the rocket. At the same time, after the gas is vented, it is convenient for the reusable rocket to collect and reuse the gas, ensuring the safety of the recovered stages.

[0018] (2) The reusable rocket stage separation aerodynamic pusher of this application, by fitting the inner cylinder inside the outer cylinder, can reduce the external dimensions of the aerodynamic pusher structure, which is beneficial to optimizing the rocket structure layout. In addition, reducing the external dimensions of the outer and inner cylinders into a multi-section form is beneficial to manufacturing.

[0019] (3) The reusable rocket stage separation aerodynamic push rod of this application is equipped with an adjustable spherical structure, which can ensure the stability of the separation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the structure of one embodiment of the retracted state of the interstage separation aerodynamic pusher of a reusable rocket.

[0022] Figure 2 This is a schematic diagram of one embodiment of a reusable rocket stage separation aerodynamic pusher in the extended state. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1-2 As shown, this application provides a reusable rocket stage separation pneumatic pusher, comprising at least: a pneumatic pusher 1 disposed on a first separation body and a thrust bracket 2 disposed on a second separation body. The pneumatic pusher 1 comprises at least: a base 11, an outer cylinder 12, and an inner cylinder 13. One end of the base 11 is connected to an inflation system 3, and the other end of the base 11 is connected to one end of the outer cylinder 12. An inner retaining ring 121 is disposed on the inner side of the other end of the outer cylinder 12. An exhaust pipe 122 is also disposed on the outer cylinder 12. When the inflation system 3 supplies air to perform the separation operation, the exhaust pipe 122 is closed; when the separation operation is completed, the exhaust pipe 122 is opened. One end of the inner cylinder 13 is provided with an inner cylinder outer retaining ring 131, and the other end of the inner cylinder 13 is provided with an inner cylinder end 132. The inner cylinder 13 is located inside the outer cylinder 12. When it is contracted, the inner cylinder outer retaining ring 131 contacts the other end of the base 11. After the air supply system 3 pushes out, the inner cylinder outer retaining ring 131 is limited and connected to the outer cylinder inner retaining ring 121. The inner cylinder end 132 is located outside the outer cylinder 12 and contacts the thrust bracket 2, thereby achieving separation.

[0025] Specifically, the outer cylinder 12 has a larger size (e.g., diameter) than the inner cylinder 13. Fitting the inner cylinder 13 inside the outer cylinder 12 reduces the overall size of the aerodynamic pusher structure, which is beneficial for optimizing the rocket's structural layout. Furthermore, reducing the overall size of the outer cylinder 12 and inner cylinder 13 into a multi-section form facilitates manufacturing. The thrust bearing 2 is installed on the other side of the rocket stage, enabling the force of the aerodynamic pusher 1 to be transmitted to the other side of the rocket stage, thus ensuring a smooth separation process.

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

[0027] Furthermore, the inflation system 3 is used to provide compressed air to the pneumatic actuator 1 and to increase the inflation volume. The gas provided by the inflation system 3 is a working gas such as nitrogen, helium, or compressed air.

[0028] Furthermore, the base 11 can be a one-piece structure or a separate structure, and this application preferably uses a one-piece structure.

[0029] Furthermore, the outer cylinder 12 can be a one-piece structure or a separate structure, and this application preferably uses a one-piece structure.

[0030] Furthermore, the inner cylinder 13 can be a one-piece structure or a separate structure, and this application preferably uses a one-piece structure.

[0031] Furthermore, a dynamic sealing ring 133 is provided on the outer side of the inner cylinder 13.

[0032] Specifically, the sealing performance of the inner cylinder 13 is ensured by the dynamic sealing ring 133 when the cylinder 13 moves.

[0033] Furthermore, the specific location of the dynamic sealing ring 133 depends on the actual situation. In this application, it is preferred that the dynamic sealing ring 133 is located on the outside of the inner cylinder outer retaining ring 131.

[0034] Furthermore, a docking ring 111 is provided on the outer side of the base 11. After the other end of the base 11 is connected to one end of the outer cylinder 12, one end of the outer cylinder 12 is also in contact with the docking ring 111.

[0035] Specifically, the docking ring 111 can limit the connection position between the outer cylinder 12 and the base 11.

[0036] Furthermore, a static sealing ring 112 is provided on the docking ring 111. After the other end of the base 11 is connected to one end of the outer cylinder 12, one end of the outer cylinder 12 is also in contact with the static sealing ring 112.

[0037] Specifically, the static sealing ring 112 ensures the sealing of the connection between the outer cylinder 12 and the base 11.

[0038] Furthermore, a first outer cylinder outer retaining ring 123 is provided at one end of the outer cylinder 12. After the other end of the base 11 is connected to one end of the outer cylinder 12, the first outer cylinder outer retaining ring 123 contacts the static sealing ring 112.

[0039] Furthermore, the inner cylinder end 132 is an adjustable spherical structure, but is not limited to an adjustable spherical structure. In this application, an adjustable spherical structure is preferred to ensure the stability of the separation system.

[0040] Specifically, the adjustable spherical structure allows the two rocket stages on both sides of the separation surface to be in close contact with the aerodynamic push rod 1 before separation. The spherical structure can prevent the different attitudes of the two stages during separation from affecting the stroke of the aerodynamic push rod 1.

[0041] Furthermore, the other end of the base 11 is detachably connected to one end of the outer cylinder 12.

[0042] Furthermore, the other end of the base 11 is threaded to one end of the outer cylinder 12, but is not limited to threaded connection. In this application, threaded connection is preferred to facilitate installation, disassembly or replacement.

[0043] Furthermore, the exhaust pipe 122 includes: a vertical pipe 1221 and a horizontal pipe 1222; one end of the vertical pipe 1221 is connected to and communicates with the outer cylinder 12; one end of the vertical pipe 1221 is connected to one end of the horizontal pipe 1222 and communicates with the horizontal pipe 1222, and after connection, the vertical pipe 1221 and the horizontal pipe 1222 have a connection angle α; the other end of the horizontal pipe 1222 faces the end of the outer cylinder 12 where the inner retaining ring 121 of the outer cylinder is provided.

[0044] Specifically, the exhaust pipe 122 ensures that after the reusable rocket stage separation pneumatic push rod completes the separation work, the gas in the pneumatic push rod 1 and the inflation system 3 is quickly discharged. The reaction force of the discharged gas on the air is used to do secondary work, thereby increasing the kinetic energy of the two rocket stages. In addition, the stage with discharged gas is more convenient for the reusable rocket to collect and reuse, and can ensure the safety of the recovered stage.

[0045] Furthermore, the exhaust pipe 122 can be an integral structure or a separate structure, and in this application, it is preferably an integral structure.

[0046] Furthermore, the specific value of the connection angle α is set according to the actual situation. In this application, it is preferably 90°, with the horizontal tube 1222 parallel to the outer cylinder 12.

[0047] Furthermore, a second outer cylinder retaining ring 124 is provided on the outer side of the other end of the outer cylinder 12 for easy installation.

[0048] Furthermore, the exhaust pipe 122 is positioned close to the outer retaining ring 124 of the second outer cylinder. When the reusable rocket interstage separation pneumatic push rod is in the retracted state, the inner cavity of the inner cylinder 13 is connected to the inner cavity of the base 11, and the exhaust pipe 122 is not connected to the inner cavity of the inner cylinder 13 or the inner cavity of the base 11. Therefore, the exhaust pipe 122 is in the closed state, and gas will not be discharged from the exhaust pipe 122 when the inflation system supplies gas to perform the separation operation. When the reusable rocket interstage separation pneumatic push rod is in the extended state (i.e., after the separation operation is completed), the inner cavity of the inner cylinder 13, the inner cavity of the outer cylinder 12, and the inner cavity of the base 11 are connected, and the exhaust pipe 122 is connected to the inner cavity of the inner cylinder 13, the inner cavity of the outer cylinder 12, and the inner cavity of the base 11. Therefore, the exhaust pipe 122 is in the open state, which can quickly discharge the gas inside the pneumatic push rod 1 and the inflation system 3.

[0049] The beneficial effects achieved by this application are as follows:

[0050] (1) After the reusable rocket stage separation pneumatic pusher of this application performs its work, the exhaust pipe on the pneumatic pusher can quickly vent the gas inside the pneumatic pusher and the gas filling system. The reaction force of the vented gas gives the stages on both sides of the separation surface additional kinetic energy, thereby accelerating the separation speed of the two stages of the rocket. At the same time, after the gas is vented, it is convenient for the reusable rocket to collect and reuse the gas, ensuring the safety of the recovered stages.

[0051] (2) The reusable rocket stage separation aerodynamic pusher of this application, by fitting the inner cylinder inside the outer cylinder, can reduce the external dimensions of the aerodynamic pusher structure, which is beneficial to optimizing the rocket structure layout. In addition, reducing the external dimensions of the outer and inner cylinders into a multi-section form is beneficial to manufacturing.

[0052] (3) The reusable rocket stage separation aerodynamic push rod of this application is equipped with an adjustable spherical structure, which can ensure the stability of the separation system.

[0053] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the scope of protection of this application is intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application. Obviously, those skilled in the art can make various alterations and variations to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of protection of this application and its equivalents, this application also intends to include these modifications and variations.

Claims

1. A recyclable rocket interstage separation pneumatic push rod, characterized in that: At least: A pneumatic push rod disposed on the first separation body and a thrust bracket disposed on the second separation body; Wherein, the pneumatic push rod at least comprises: a base, an outer cylinder and an inner cylinder; Among them, 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; the inner side of the other end of the outer tube is provided with an outer tube inner retaining ring; the outer tube is also provided with an exhaust pipe, when the inflation system supplies air to perform the separation work, the exhaust pipe is closed; when the separation work is completed, the exhaust pipe is opened; An inner tube outer retaining ring is provided at one end of the inner tube, and an inner tube end head is provided at the other end of the inner tube; the inner tube is arranged in the outer tube, and when contracted, the inner tube outer retaining ring contacts the other end of the base; after the inflation system supplies air and pushes it out, the inner tube outer retaining ring is limitedly connected with the outer tube inner retaining ring, the inner tube end head is located outside the outer tube, and the inner tube end head contacts the thrust bracket, thereby achieving separation.

2. The recyclable rocket interstage separation pneumatic push rod according to claim 1, characterized in that: A dynamic sealing ring is arranged on the outer side of the inner cylinder.

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

4. The recyclable rocket interstage separation 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 recyclable rocket interstage separation pneumatic push rod according to claim 4, characterized in that: A static sealing ring is arranged on the butt joint 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 recyclable rocket interstage separation pneumatic push rod according to claim 1, characterized in that: The end of the inner cylinder is an adjustable spherical structure.

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

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

9. The recyclable rocket interstage separation pneumatic push rod according to claim 1, characterized in that: The exhaust pipe includes: Vertical tube and horizontal tube; one end of the vertical tube is connected to the outer tube and communicated with the outer tube; one end of the vertical tube is connected to one end of the horizontal tube and communicated with the horizontal tube. After the connection, there is a connection angle between the vertical tube and the horizontal tube; the other end of the horizontal tube faces one end of the outer tube where an inner retaining ring of the outer tube is provided.

10. The recyclable rocket interstage separation pneumatic push rod according to claim 9, characterized in that: The connection angle is 90°.

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