Multiplexed liquid rocket separation structure

Abstract

This invention discloses a reusable liquid rocket separation structure, comprising multiple unlocking and locking mechanisms. The unlocking mechanism includes a first housing, a piston cylinder, an elastic element, a separation top block, a separation top rod, a separation nut, an unlocking bolt, and a first base. The elastic element, separation top block, separation top rod, and separation nut are all located within the piston cylinder. The piston cylinder slides relative to the inner wall of the cavity, and its closed end communicates with the air inlet of the first housing. One end of the elastic element is connected to the inner wall of the closed end of the piston cylinder, and the other end is connected to one end of the separation top block. The other end of the separation top block abuts against the separation nut. One end of the separation top rod is located within a hollow portion of the elastic element, and the other end abuts against the unlocking bolt. The other side of the unlocking bolt passes through the first base and connects to the locking structure. The locking structure is used to lock the unlocking bolts after the separation of adjacent stages of the liquid rocket. This structure facilitates rapid separation between rocket stages and is structurally stable, safe, and reliable.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and in particular to a reusable liquid rocket separation structure. Background Technology

[0002] With the rapid development of the aerospace industry, various technologies involved in the rocket field have also made leaps and bounds. Among them, rocket recovery is an important way to reduce rocket launch costs. During rocket recovery, each stage typically needs to be recovered individually. To facilitate the rapid separation of the connected stages, separation devices need to be installed at the connection points of each stage. Currently, these separation devices are mainly based on explosive bolts. However, the storage, transportation, and management of explosive bolts are complex, and the high-pressure gas flow generated during the explosive separation process can damage onboard equipment, thus affecting the safe recovery of each stage.

[0003] There is an urgent need to provide a reusable liquid rocket separation structure that facilitates rapid separation between rocket stages and is structurally stable, safe, and reliable. Summary of the Invention

[0004] The purpose of this invention is to provide a reusable liquid rocket separation structure that facilitates rapid separation between rocket stages, and is structurally stable, safe, and reliable, thereby improving the reliability and efficiency of rocket stage recovery.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] One aspect of the present invention provides a reusable liquid rocket separation structure for rapid separation between adjacent stages of a liquid rocket, comprising multiple unlocking mechanisms and locking mechanisms. The multiple unlocking mechanisms are evenly distributed on one side of the first stage of the liquid rocket and close to the second stage of the rocket. The locking mechanisms are disposed on the second stage of the liquid rocket and correspond one-to-one with the unlocking mechanisms.

[0007] The unlocking mechanism includes at least a first housing, a piston cylinder, an elastic element, a separating top block, a separating top rod, a separating nut, an unlocking bolt, and a first base;

[0008] The first housing and the first base are connected to form a structure with an internal cavity. The piston cylinder is located in the cavity. The elastic element, the separating top block, the separating top rod and the separating nut are all located in the piston cylinder.

[0009] The piston cylinder slides relative to the inner wall of the cavity. The closed end of the piston cylinder is used to communicate with the air inlet of the first housing, and the open end extends to one side of the first base. One end of the elastic element is connected to the inner wall of the closed end of the piston cylinder, and the other end is connected to one end of the separating top block. The other end of the separating top block abuts against the separating nut. One end of the separating rod is located in the hollow part of the elastic element, and the other end abuts against the unlocking bolt. The separating nut is sleeved on one side of the unlocking bolt, and the inner and outer surfaces of the separating nut abut against the surface of the unlocking bolt and the piston cylinder, respectively, to lock the separating nut. The other side of the unlocking bolt passes through the first base and is connected to the locking structure.

[0010] The locking structure is used to lock the unlocking bolts after the separation of adjacent stages of the liquid rocket.

[0011] Furthermore, the air inlet of the first housing includes a first air inlet and a second air inlet communicating with the first air inlet. In the direction extending from the first housing to the first base, the diameter of the first air inlet gradually narrows to the same diameter as the second air inlet.

[0012] Furthermore, the closed end of the piston cylinder is provided with at least one opening channel, and the diameter of the opening channel is smaller than the diameter of the air inlet.

[0013] Furthermore, the piston cylinder has a first annular groove and a second annular groove at equal intervals on the outer wall of the side away from the first base. A first sealing ring is provided on the first annular groove. The inner wall of the first sealing ring abuts against the bottom of the first annular groove. The outer wall of the first sealing ring is slidably disposed with the inner wall of the first housing. The cross-section of the second annular groove along the axial direction is an isosceles trapezoidal structure, with the larger end close to the inner wall of the first housing and the smaller end recessed towards the piston cylinder axis.

[0014] Furthermore, the piston cylinder has a first annular protrusion and a second annular protrusion at equal intervals on the inner wall of the side near the first base. The first annular protrusion abuts against the release nut to radially limit the release nut before it moves. The first annular protrusion, the second annular protrusion, and the inner wall portion between the first annular protrusion and the second annular protrusion form an annular limiting groove. The annular limiting groove is used to radially unlock the release nut after it moves axially.

[0015] Furthermore, the separating top block is a cylindrical structure with both ends connected, and the separating top block has a conical surface protruding to one side of the separating top block at the end near the separating nut. One end of the separating top rod passes through the separating top block and is connected to the unlocking bolt, while the other end is used to abut against the end face of the separating top block away from the separating nut.

[0016] Furthermore, the release nut is composed of multiple nut flaps with internal threads, and the multiple nut flaps are arranged at equal intervals on the circumferential surface of the unlocking bolt. The nut flaps have an inclined surface that matches the release top block on the side near the release top block, and the inclined surface is close to the conical surface.

[0017] Furthermore, the outer surface of the nut flap is provided with a first annular protrusion and a second annular protrusion at equal intervals. The first annular protrusion is used to abut against the inner wall of the piston cylinder to radially limit the release nut. The first annular protrusion, the second annular protrusion, and the inner wall portion located between the first annular protrusion and the second annular protrusion constitute an annular inner groove for unlocking the radial movement of the nut flap.

[0018] Furthermore, one end of the separating rod passes through the separating block and abuts against the unlocking bolt to drive the unlocking bolt to quickly disengage from the separating nut.

[0019] Furthermore, the first base includes a base plate with holes of the same diameter and a column, wherein the column forms a step at the transition point to the base plate, and a protective pad is provided on the surface of the step.

[0020] Furthermore, the first housing is connected to the first base by bolts.

[0021] Furthermore, one end of the unlocking bolt is connected to the release nut, and the other end is fixedly connected to the locking structure.

[0022] Furthermore, the locking structure includes a second housing, a second base, an anti-disengagement component, a first buffer, and a second buffer. The second housing and the second base form a closed structure with an internal movable cavity. The anti-disengagement component, the first buffer, and the second buffer are located within the movable cavity. The first buffer is connected to the unlocking bolt to buffer the elastic force applied to the second base during the rebound of the unlocking bolt. The second buffer is located within the second housing to buffer the elastic force applied to the second housing by the unlocking bolt. The anti-disengagement component is used to limit the movement of the unlocking bolt towards the unlocking mechanism.

[0023] Furthermore, the anti-detachment component consists of a fixed plate and multiple bent plates. The multiple bent plates are arranged at equal intervals along the circumference of the fixed plate. One end of each bent plate is fixedly connected to the fixed plate, and the other end is bent away from the fixed plate and towards the axis of the fixed plate.

[0024] Furthermore, the outer side of the fixing plate is located between the second housing and the second base and passes through the second housing in sequence by bolts, and the fixing plate and the second base are then fixed.

[0025] This invention provides a reusable liquid rocket separation structure for rapid separation between adjacent stages of a liquid rocket. It consists of multiple unlocking mechanisms and locking mechanisms. The multiple unlocking mechanisms are evenly distributed on the first stage of the liquid rocket and on the side close to the second stage. The locking mechanisms are disposed on the second stage of the liquid rocket and correspond one-to-one with the unlocking mechanisms.

[0026] In use, a portion of the high-pressure gas enters through the air inlet of the first housing and is used to push the piston cylinder along the inner wall of the cavity toward the first base, so that there is enough space between the separating nut and the piston cylinder for the separating nut to move radially. The other portion enters the piston cylinder and pushes the separating top block and the separating top rod toward the first base. The separating top block applies pressure to the separating nut, causing the separating nut to move radially, thereby completing the rapid radial unlocking of the separating nut and the unlocking bolt. The separating top rod is subjected to the pressure applied by the piston cylinder, so that the separating top rod applies axial pressure to the unlocking bolt after unlocking, thereby causing the unlocking bolt to quickly separate from the unlocking mechanism along with the locking mechanism.

[0027] The entire reusable liquid rocket separation structure facilitates rapid separation between rocket stages, and is structurally stable, safe, and reliable, improving the reliability and efficiency of rocket stage recovery.

[0028] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the invention. Attached Figure Description

[0029] Figure 1 This is a cross-sectional schematic diagram of the reusable liquid rocket separation structure of the present invention;

[0030] Figure 2 This is a cross-sectional schematic diagram of the unlocking mechanism of the present invention;

[0031] Figure 3 This is a top view of the separation nut and unlocking bolt of the present invention.

[0032] Figure label:

[0033] 1. First housing 2. Piston cylinder

[0034] 3 elastic element 4 separation top block

[0035] 5. Release rod 6. Release nut

[0036] 7 Unlocking bolts 8 First base

[0037] 9. Air intake 10. First annular protrusion

[0038] 11 Second annular protrusion 12 First annular protrusion

[0039] 13 Second annular protrusion 14 Second housing

[0040] 15 Second base 16 Anti-slip components

[0041] 17 First buffer 18 Second buffer Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0046] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0047] like Figure 1 and Figure 2 As shown, a reusable liquid rocket separation structure is used for rapid separation between adjacent stages of a liquid rocket. It includes multiple unlocking mechanisms and locking mechanisms. The multiple unlocking mechanisms are evenly distributed on one side of the first stage of the liquid rocket and close to the second stage. The locking mechanisms are set on the second stage of the liquid rocket and correspond one-to-one with the unlocking mechanisms.

[0048] The unlocking mechanism includes at least a first housing 1, a piston cylinder 2, an elastic element 3, a separating top block 4, a separating top rod 5, a separating nut 6, an unlocking bolt 7, and a first base 8.

[0049] The first housing 1 and the first base 8 are connected to form a structure with an internal cavity. The piston cylinder 2 is located inside the cavity, and the elastic element 3, the separating top block 4, the separating top rod 5 and the separating nut 6 are all located inside the piston cylinder 2.

[0050] The piston cylinder 2 slides relative to the inner wall of the cavity. The closed end of the piston cylinder 2 is used to communicate with the air inlet 9 of the first housing 1, and the open end extends towards one side of the first base 8. One end of the elastic element 3 is connected to the inner wall of the closed end of the piston cylinder 2, and the other end is connected to one end of the separation top block 4. The other end of the separation top block 4 abuts against the separation nut 6. One end of the separation top rod 5 is located in the hollow part of the elastic element 3, and the other end abuts against the unlocking bolt 7. The separation nut 6 is sleeved on one side of the unlocking bolt 7. The inner and outer surfaces of the separation nut 6 abut against the surfaces of the unlocking bolt 7 and the piston cylinder 2, respectively, so that the separation nut is locked. The other side of the unlocking bolt 7 passes through the first base 8 and is connected to the locking structure. The locking structure is used to lock the unlocking bolt 7 after the separation of adjacent stages of the liquid rocket.

[0051] Specifically, the reusable liquid rocket separation structure provided by this invention is used for rapid separation between adjacent stages of a liquid rocket, and consists of multiple unlocking mechanisms and locking mechanisms. The multiple unlocking mechanisms are evenly distributed on one side of the first stage of the liquid rocket, close to the second stage, while the locking mechanisms are located on the second stage and correspond one-to-one with the unlocking mechanisms.

[0052] In use, high-pressure gas enters through the air inlet 9 of the first housing 1. A portion of the high-pressure gas is used to push the piston cylinder 2 along the inner wall of the cavity towards the first base 8. There is sufficient space between the separating nut 6 and the piston cylinder for the separating nut 6 to move radially. The other portion enters the piston cylinder 2 to push the separating top block 4 and the separating top rod 5 towards the first base 8. The separating top block 4 applies pressure to the separating nut 6, causing the separating nut 6 to move radially, thereby completing the rapid radial unlocking of the separating nut 6 and the unlocking bolt 7. The separating top rod 5 is subjected to the pressure applied by the piston cylinder 2, causing the separating top rod 5 to apply axial pressure to the unlocked unlocking bolt, thereby causing the unlocking bolt 7 to quickly separate from the unlocking mechanism along with the locking mechanism.

[0053] The entire reusable liquid rocket separation structure facilitates rapid separation between rocket stages, and is structurally stable, safe, and reliable, improving the reliability and efficiency of rocket stage recovery.

[0054] It should be noted that, in order to facilitate the entry of high-pressure gas into the interior of the first housing 1 and to increase the gas output pressure, for example, the air inlet 9 of the first housing 1 includes a first air inlet and a second air inlet connected to the first air inlet. Extending from the first housing 1 towards the first base 8, the diameter of the first air inlet gradually narrows to the same diameter portion as the second air inlet. This narrowing of the air inlet diameter increases the pressure per unit area of ​​the piston cylinder, allowing for rapid axial movement of the piston cylinder. This facilitates pressure control and further improves the radial unlocking speed of the release nut 6.

[0055] It is worth mentioning that, in order to facilitate the entry of high-pressure gas into the piston cylinder 2 and ensure a stable thrust on the separating top block 4 and the separating top rod 5, for example, the closed end of the piston cylinder 2 is provided with at least one opening channel, and the diameter of the opening channel is smaller than the diameter of the air inlet. Furthermore, when multiple opening channels are present, the sum of the areas of the opening portions of the multiple opening channels is smaller than the area of ​​the air inlet. In this embodiment, the number of opening channels is described as one. To facilitate the movement of the piston cylinder, for example, the axis of the opening channel and the air inlet are located on the same center line. Part of the high-pressure gas enters the piston cylinder 2 through the through hole, and the other part acts on the surface of the piston cylinder, rapidly pushing the piston cylinder to move axially, thus creating a space inside the piston cylinder for the radial movement of the separating nut 6, thereby facilitating the rapid radial movement of the separating nut 6.

[0056] In addition, the outer wall of the piston cylinder 2, away from the first base 8, is provided with a first annular groove and a second annular groove at equal intervals. To reduce the leakage of high-pressure gas from the gap between the piston cylinder 2 and the first housing 1, which would affect the rapid movement of the piston cylinder 2 (leakage reduces the pressure difference between the two ends of the piston cylinder, especially the pressure difference between the closed end of the piston cylinder 2 and the second annular groove, thus reducing the pressure on the piston cylinder towards the first base), for example, a first sealing ring is provided on the first annular groove. The inner wall of the first sealing ring abuts against the bottom of the first annular groove, and the outer wall of the first sealing ring is slidably disposed against the inner wall of the first housing. The second annular groove reduces the weight of the piston cylinder 2, further improving the piston cylinder's movement speed under pressure. To ensure the structural stability of the second annular groove, for example, the cross-section of the second annular groove along its axial direction is an isosceles trapezoid, with the larger end close to the inner wall of the first housing 1 and the smaller end recessed towards the axis of the piston cylinder 2. Furthermore, to further reduce the weight of the piston cylinder 2, for example, the slot volume of the first annular groove is smaller than the slot volume of the second annular groove.

[0057] Furthermore, the two ends of the release nut 6 are respectively in close contact with the inner end face of the first base and the end face of the release block 4 away from the elastic element 3. The first base is used to provide axial support for the release nut, preventing the release nut from moving to one side of the first base. In order to facilitate the radial movement of the release nut and quickly unlock the release nut from the unlocking bolt, for example, the inner wall of the piston cylinder 2 near the first base 8 is provided with a first annular protrusion 10 and a second annular protrusion 11 at equal intervals. The first annular protrusion 10 abuts against the release nut 6 to radially limit the release nut 6 before it moves. The first annular protrusion 10, the second annular protrusion 11, and the inner wall portion between the first annular protrusion 10 and the second annular protrusion 11 form an annular limiting groove. The annular limiting groove provides space for the radial movement of the release nut 6 (the second annular protrusion 11 of the release nut moves radially within the annular limiting groove). When the piston cylinder 2 moves downward, the first annular protrusion 10... The first annular protrusion 10 separates from the second annular protrusion 12, meaning the first annular protrusion 12 is located on the side of the first annular protrusion 10 away from the second annular protrusion 11 (there is a first movable gap between the top end face of the first annular protrusion and its corresponding piston cylinder inner wall). The second annular protrusion moves into the annular limiting groove. The location of the first annular protrusion on the side of the first annular protrusion 10 away from the second annular protrusion 11 and the annular limiting groove provide sufficient movable space for the separation nut, so that the separation nut can move radially (the first base provides axial support for the separation nut), ensuring that the separation nut and the unlocking bolt can be quickly unlocked, thereby facilitating the quick movement of the unlocking bolt to the locking mechanism side and ensuring the rapid separation between adjacent rocket stages.

[0058] It should be further explained that, to ensure the stability of the separating top block 4, for example, the separating top block 4 is a cylindrical structure with both ends open. The separating top rod 5 passes through the cylindrical structure, and the separating top block 4 acts as a guide to facilitate the axial movement of the separating top rod 5. In addition, to enable the separating nut 6 to move radially quickly, for example, the separating top block 4 has a conical surface protruding towards one side of the separating top block 4 near the separating nut 6. Through the design of the conical surface, it can be ensured that the separating top block 4 applies radial pressure to the separating nut 6, so that the separating nut 6 moves radially quickly, thereby completing the radial unlocking of the unlocking bolt 7. In addition, one end of the separating top rod 5 passes through the separating top block 4 and connects to the unlocking bolt 7, while the other end is used to abut against the end face of the separating top block 4 away from the separating nut 6 to limit the axial movement of the separating top rod 5 and prevent the separating top rod 5 from the separating top block 4. In this embodiment, one end of the separating top rod 5 passes through the separating top block 4 and abuts against the unlocking bolt 7 to drive the unlocking bolt 7 to quickly disengage from the separating nut 6.

[0059] like Figure 1 , Figure 2 and Figure 3 As shown, to facilitate the rapid opening of the release nut 6, i.e., the radial movement of the release nut 6, for example, the release nut 6 is composed of multiple nut flaps with internal threads, and the multiple nut flaps are evenly spaced on the circumferential surface of the unlocking bolt 7. To facilitate the application of radial pressure to the nut flaps, so that the nut flaps open quickly, for example, the side of the nut flaps near the release top block is provided with an inclined surface that matches the release top block 4, i.e., the inclined surface and the conical surface are close to each other. According to the force decomposition, the inclined surface can decompose a part of the radial force, thereby accelerating the radial movement of the nut flaps.

[0060] To ensure that the piston cylinder 2 quickly applies elastic force to the separating top block 4 (the elastic force applied by the elastic element to the separating top block precedes the pressure applied by the separating rod to the unlocking bolt), for example, the elastic element 3 is located between the piston cylinder 2 and the separating top block 4, and the elastic element 3 is a spring structure. In practical applications, to enhance the flexibility of the elastic element 3 and improve its compressive strength, for example, the elastic element 3 can also be a double-layer bellows structure.

[0061] In addition, the outer surface of the nut flap is provided with a first annular protrusion 12 and a second annular protrusion 13 at equal intervals. The first annular protrusion 12 is used to abut against the first annular protrusion 10 to radially limit the release nut 6. The first annular protrusion 12, the second annular protrusion 13, and the inner wall portion located between the first annular protrusion 12 and the second annular protrusion 13 constitute an annular inner groove for unlocking the radial movement of the nut flap. The annular inner groove can provide sufficient movement space for the first annular protrusion 10, so that the nut flap can move radially (move away from the unlocking bolt).

[0062] In the same embodiment, to ensure a tight connection between the first housing 1 and the first base 8, for example, the first housing 1 and the first base 8 are connected by bolts. To buffer vibrations between the first housing 1 and the first base 2 and reduce wear on components, for example, the first base 8 includes a base plate with holes of the same diameter and a column. A step is formed at the transition point of the column to the base plate, and a protective gasket is provided on the surface of the step. The protective gasket serves both a buffering function and a sealing function to prevent external impurities from entering the cavity. In addition, to limit the axial movement of the piston cylinder 2, for example, the distance between the outer wall of the column and the inner wall of the first housing 1 is smaller than the distance between the inner wall of the piston cylinder 2 near the first base 8 and the inner wall of the first housing 1. When the piston cylinder 2 moves axially, the end face of the piston cylinder 2 near the first base 8 is in close contact with the end face of the column away from the base plate, thus completing the axial limitation of the piston cylinder 2.

[0063] Additionally, the end face of the column away from the base plate is used to support the nut flap to prevent axial movement of the nut flap. Further, to facilitate radial movement of the nut flap, for example, the end face of the column away from the base plate is a beveled end face, inclined from the inner wall of the column to the outer wall. The nut flap has a beveled surface matching the beveled end face, and the end of the nut flap near the column is subjected to radial pressure, causing the nut flap to quickly separate from the unlocking bolt 7.

[0064] In the same embodiment, one end of the unlocking bolt 7 is connected to the release nut 6, and the other end is fixedly connected to the locking structure. The unlocking bolt 7 includes an upper column and a lower column, and the diameter of the upper column is smaller than the diameter of the lower column. The upper column is used to connect to the release nut 6, and the lower column is fixedly connected to the locking structure. To make the connection between the upper and lower columns tighter and the fixation more secure, for example, the upper and lower columns are integrally molded. To reduce the weight of the unlocking bolt 7, for example, the unlocking bolt 7 is a cylinder with at least one weight-reducing channel. The weight-reducing channel is arranged along the axial direction of the unlocking bolt 7, and the inner diameter of the weight-reducing channel is smaller than the diameter of the release rod 5.

[0065] Specifically, the locking structure includes a second housing 14, a second base 15, an anti-detachment component 16, a first buffer 17, and a second buffer 18. The second housing 14 and the second base 15 form a closed structure with an internal movable cavity (one end of the unlocking bolt 7 is fixed inside the movable cavity). The anti-detachment component 16, the first buffer 17, and the second buffer 18 are located inside the movable cavity. The first buffer 17 is connected to the unlocking bolt 7 to buffer the elastic force applied to the second base 15 during the rebound of the unlocking bolt 7 (wherein, the first buffer 17 and the unlocking bolt 7 are connected and fixed by a fuse, the fuse passes through the first buffer and the unlocking bolt, and one end of the unlocking bolt 7 passes through the anti-detachment component 16 before rebounding). The second buffer 18 is located inside the second housing 14 to buffer the elastic force applied to the second housing 14 by the unlocking bolt 7, and can also prevent the unlocking bolt 7 from being damaged due to direct contact with the second housing 14.

[0066] To facilitate the connection between the unlocking bolt 7 and the locking structure and to prevent the unlocking bolt 7 from detaching from the locking structure, for example, the anti-detachment component 16 is used to limit the movement of the unlocking bolt 7 towards the unlocking mechanism side, which can ensure that the unlocking bolt 7 is tightly connected to the locking structure.

[0067] Furthermore, to facilitate the capture (fixation) of the separated unlocking bolt 7, for example, the anti-detachment component 16 consists of a fixed plate and multiple bent plates. The multiple bent plates are arranged at equal intervals along the circumference of the fixed plate. One end of the bent plate is fixedly connected to the fixed plate, and the other end is bent away from the fixed plate and towards the axis of the fixed plate. The unlocking bolt 7 is located at one end of the locking structure and can move along the movable cavity towards the second buffer 18. After one end of the unlocking bolt 7 pushes open the bent plate (the bent plate is elastic, so that the end of the bent plate away from the fixed plate opens away from the axis), it abuts against the second buffer 18. During the rebound process after the unlocking bolt 7 abuts against the second buffer 18, the multiple bent plates limit one end of the unlocking bolt (the bent plates are elastic, so that the end of the bent plate away from the fixed plate retracts towards the axis), preventing the locking bolt from rebounding, thereby capturing the locking bolt.

[0068] In addition, to ensure that the fixing plate is firmly fixed and to prevent it from shifting, for example, the outer side of the fixing plate is located between the second housing 14 and the second base 15 and is fixed by bolts passing through the second housing 14 in sequence, and then the fixing plate and the second base 15.

[0069] To increase the contact area between the bent plate and the unlocking bolt 7 and prevent the unlocking bolt 7 from swinging when it rebounds, for example, an extension plate is provided at the end of the bent plate away from the fixed plate and on the outside of the bent plate. One end of the extension plate is fixedly connected to the bent plate, and the other end extends away from the bent plate. By increasing the contact area between the bent plate and the unlocking bolt 7, and preventing the unlocking bolt 7 from swinging after being captured, the probability of deformation of multiple bent plates due to uneven pressure can be reduced, ensuring the structural stability of the anti-detachment component.

[0070] To ensure a tighter connection and more secure fixation between the fixed plate and the bending plate, for example, the fixed plate and the bending plate are designed as a single piece.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A reusable liquid rocket separation structure for rapid separation between adjacent stages of a liquid rocket, characterized in that, It includes multiple unlocking mechanisms and locking mechanisms. The unlocking mechanisms are evenly distributed on the first stage of the liquid rocket, and the locking mechanisms are located on the second stage of the liquid rocket and correspond one-to-one with the unlocking mechanisms. The unlocking mechanism includes at least a first housing, a piston cylinder, an elastic element, a separating top block, a separating top rod, a separating nut, an unlocking bolt, and a first base. The first housing and the first base are connected to form a structure with an internal cavity. The piston cylinder is located inside the cavity, and the elastic element, the separating top block, the separating top rod, and the separating nut are all located inside the piston cylinder. The piston cylinder slides relative to the inner wall of the cavity. The closed end of the piston cylinder communicates with the air inlet of the first housing, and the open end extends towards one side of the first base. One end of the elastic element is connected to the inner wall of the closed end of the piston cylinder, and the other end is connected to one end of the separating top block. The other end of the separating top block abuts against the separating nut. One end of the separating rod is located in the hollow part of the elastic element, and the other end abuts against the unlocking bolt. The separating nut is sleeved on one side of the unlocking bolt, and the inner and outer surfaces of the separating nut abut against the surface of the unlocking bolt and the piston cylinder, respectively, to lock the separating nut. The other side of the unlocking bolt passes through the first base and connects to the locking structure. The locking structure is used to lock the unlocking bolts after the separation of adjacent stages of the liquid rocket. In use, a portion of the high-pressure gas enters through the air inlet of the first housing and is used to push the piston cylinder along the inner wall of the cavity toward the first base, so that there is enough space between the separating nut and the piston cylinder for the separating nut to move radially. The other portion enters the piston cylinder and pushes the separating top block and the separating top rod toward the first base. The separating top block applies pressure to the separating nut, causing the separating nut to move radially, thereby completing the rapid radial unlocking of the separating nut and the unlocking bolt. The separating top rod is subjected to the pressure applied by the piston cylinder, so that the separating top rod applies axial pressure to the unlocking bolt after unlocking, thereby causing the unlocking bolt to quickly separate from the unlocking mechanism along with the locking mechanism.

2. The reusable liquid rocket separation structure according to claim 1, characterized in that, The piston cylinder has at least one opening at its closed end.

3. The reusable liquid rocket separation structure according to claim 1, characterized in that, The piston cylinder has a first annular groove and a second annular groove at equal intervals on the outer wall of the side away from the first base. A first sealing ring is provided on the first annular groove. The inner wall of the first sealing ring abuts against the bottom of the first annular groove, and the outer wall of the first sealing ring is slidably disposed with respect to the inner wall of the first housing.

4. The reusable liquid rocket separation structure according to claim 1, characterized in that, The piston cylinder has a first annular protrusion and a second annular protrusion at equal intervals on the inner wall of the side near the first base. The first annular protrusion abuts against the release nut to radially limit the release nut before it moves. The first annular protrusion, the second annular protrusion, and the inner wall portion between the first annular protrusion and the second annular protrusion form an annular limiting groove. The annular limiting groove is used to radially unlock the release nut after it moves axially.

5. The reusable liquid rocket separation structure according to claim 1, characterized in that, The separating top block is a cylindrical structure with both ends connected. The separating top block has a conical surface protruding to one side of the separating top block at the end near the separating nut. One end of the separating top rod passes through the separating top block and is connected to the unlocking bolt. The other end is used to abut against the end face of the separating top block away from the separating nut.

6. The reusable liquid rocket separation structure according to claim 5, characterized in that, The release nut is composed of multiple nut flaps with internal threads. The multiple nut flaps are arranged at equal intervals on the circumferential surface of the unlocking bolt. The nut flaps have an inclined surface that matches the release top block on the side near the release top block. The inclined surface and the conical surface are close to each other.

7. The reusable liquid rocket separation structure according to claim 6, characterized in that, The outer surface of the nut flap is provided with a first annular protrusion and a second annular protrusion at equal intervals. The first annular protrusion is used to abut against the inner wall of the piston cylinder to radially limit the release nut. The first annular protrusion, the second annular protrusion, and the inner wall portion located between the first annular protrusion and the second annular protrusion constitute an annular inner groove for unlocking the radial movement of the nut flap.

8. The reusable liquid rocket separation structure according to claim 1, characterized in that, The first base includes a base plate with holes of the same diameter and a column. The column forms a step at the transition point to the base plate, and a protective pad is provided on the surface of the step.

9. The reusable liquid rocket separation structure according to claim 1, characterized in that, The locking structure includes a second housing, a second base, an anti-disengagement component, a first buffer, and a second buffer. The second housing and the second base form a closed structure with an internal movable cavity. The anti-disengagement component, the first buffer, and the second buffer are located within the movable cavity. The first buffer is connected to the unlocking bolt to buffer the elastic force applied to the second base during the rebound of the unlocking bolt. The second buffer is located within the second housing to buffer the elastic force applied to the second housing by the unlocking bolt. The anti-disengagement component limits the movement of the unlocking bolt toward the unlocking mechanism.

10. The reusable liquid rocket separation structure according to claim 9, characterized in that, The anti-detachment component consists of a fixed plate and multiple bent plates. The multiple bent plates are arranged at equal intervals along the circumference of the fixed plate. One end of each bent plate is fixedly connected to the fixed plate, and the other end is bent away from the fixed plate and towards the axis of the fixed plate. The outer side of the fixing plate is located between the second housing and the second base and passes through the second housing in sequence by bolts. The fixing plate and the second base are then fixed.

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