Rocket interstage bearing and separating integrated device

Abstract

The invention discloses a rocket interstage bearing and separating integrated device. A first separating part section and a second separating part section are detachably and fixedly connected through a fastener; the fastener comprises a butt-joint bolt and a separation nut; the separation nut is a split type nut which can be separated in the radial direction. When the separation nut is in a locking state, the separation nut is in threaded connection with the thread meshing area of the butt-joint bolt; when the separation nut is in the decomposed state, the butt joint bolt is separated from the threaded connection with the separation nut and has the capability of moving away from a threaded connection area in the axial direction under the action of external force; the radial limiting mechanism is configured to enable the separation nut to be in a stable locking state; the actuating mechanism is configured to drive the radial limiting mechanism to move through movement of the actuating mechanism, so that the separation nut is converted into a decomposition state from a stable locking state. A non-initiating explosive replacement scheme of a pure mechanical mechanism is adopted, interstage connection and separation of the carrier rocket can be achieved, and dependence on initiating explosive devices is greatly eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of launch vehicle separation, in particular to a rocket interstage bearing separation integrated device. BACKGROUND

[0002] The main functions of the interstage connection-separation structure of a launch vehicle include two aspects: one is to transfer the load through reliable connection, and the other is to achieve reliable unlocking and separation when the booster stage separates. Since the traditional separation form is generally unlocked by pyrotechnics, various functions are generally realized through independent structures.

[0003] The traditional separation unlocking mode is mainly designed with pyrotechnics as the core energy source. This mode has certain advantages after years of accumulation. However, due to the special properties of pyrotechnics, the production is limited, and it is difficult to meet the needs of commercial aerospace fields in construction cost, construction cycle and other aspects while ensuring traditional launch tasks.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a rocket interstage bearing separation integrated device, which uses a pure mechanical mechanism to replace pyrotechnics to realize the interstage connection and separation of the launch vehicle, greatly reducing the dependence on pyrotechnics.

[0006] A rocket interstage bearing separation integrated device, comprising a first separation section and a second separation section, a shell, a fastener, a radial limiting mechanism and an actuating mechanism;

[0007] The shell has an installation cavity inside; the radial limiting mechanism and the actuating mechanism are arranged in the installation cavity;

[0008] The first separation section and the second separation section are detachably fixedly connected through the fastener; the fastener comprises a butt joint bolt and a separation nut; the separation nut is arranged in the installation cavity, and the separation nut is a split nut capable of separating in the radial direction, and can be in a locked state and a disassembled state;

[0009] When the separation nut is in the locked state, the separation nut is threadedly connected with the thread engagement area of the butt joint bolt;

[0010] When the separation nut is in the disassembled state, the butt joint bolt is threadedly disconnected with the separation nut, and has the ability to move away from the threaded connection area in the axial direction under the action of an external force;

[0011] The radial limiting mechanism is configured to keep the separation nut in a stable locked state;

[0012] The actuating mechanism is configured to drive the radial limiting mechanism to move through its motion, so that the separating nut changes from a stable locked state to a disassembled state.

[0013] Preferably, the radial limiting mechanism includes a locking sleeve; the locking sleeve is disposed within the mounting cavity; the locking sleeve includes a receiving cavity capable of accommodating the release nut; the release nut is disposed within the receiving cavity;

[0014] There is a movable gap between the axial end of the locking sleeve and the inner wall of the housing, and the locking sleeve can be in a first position and a second position. When the locking sleeve is in the first position, the release nut radially limits the release nut, so that the release nut is in a locked state. When the locking sleeve is in the second position, the release nut is released from the radial limit on the release nut, and the release nut can be in a disassembled state.

[0015] Preferably, the radial limiting mechanism includes an elastic element for axially limiting the locking sleeve so that the locking sleeve is stably in a first position; the elastic element is disposed in the mounting cavity and is located in the gap between the axial end of the locking sleeve and the inner wall of the housing.

[0016] Preferably, the release nut includes a groove disposed on its outer circumference; the locking sleeve includes a protrusion that can be inserted into the groove; when the locking sleeve is in a first position, the protrusion abuts against the non-groove position of the release nut; when the locking sleeve is in a second position, the protrusion is inserted into the groove.

[0017] Preferably, the radial limiting mechanism further includes a limiting bead disposed on the protrusion; the limiting bead is fixedly connected to the locking sleeve by a limiting screw; the limiting bead partially protrudes from the surface of the protrusion; the separating nut includes a ball socket disposed on its outer circumference; the position of the ball socket does not coincide with the position of the groove; when the locking sleeve is in the first position, the limiting bead is located in the ball socket.

[0018] Preferably, the actuating mechanism includes an outer actuating cylinder for pushing the locking sleeve from a first position to a second position; the outer actuating cylinder is slidably disposed within the mounting cavity; an ejector ring is provided at the end of the outer actuating cylinder near the locking sleeve; the inner diameter of the ejector ring is larger than the maximum outer diameter of the release nut.

[0019] Preferably, the separating nut is provided with a second conical groove at one end near the outer actuator cylinder; the outer actuator cylinder is provided with a second conical portion at one end near the separating nut that is adapted to the second conical groove.

[0020] Preferably, the actuation mechanism further includes an outer actuator shaft for guiding the outer actuator cylinder.

[0021] Preferably, the actuating mechanism further includes an inner actuating cylinder for pushing the mating bolt out of the release nut.

[0022] Preferably, it further includes a base fixedly connected to the second separation section; the separation nut is provided with a first conical groove on one end near the base; the base is provided with a first conical part that can adapt to the first conical groove.

[0023] Compared with the prior art, this application has at least the following beneficial effects:

[0024] 1. The present invention adopts a non-pyrotechnic alternative scheme with a purely mechanical mechanism, which can realize the interstage connection and separation of the launch vehicle, greatly eliminating the dependence on pyrotechnics.

[0025] 2. The rocket stage interstage load-bearing separation integrated device of the present invention has extremely low installation requirements, almost no special training requirements for personnel, operators can quickly get started, has good adaptability and can improve installation efficiency.

[0026] 3. The rocket stage interstage load-bearing separation integrated device of the present invention is an independent unit design, which has great design scalability and the potential to carry out multiple redundancy designs, thereby enabling reliability expansion. Attached Figure Description

[0027] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0028] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0029] Fig. 2 This is a schematic diagram of the unlocked state of the present invention;

[0030] Fig. 3 This is a schematic diagram of the structure in the separated state of the present invention.

[0031] The above figures include the following reference numerals:

[0032] 1. Connecting bolt; 2. First separation section; 3. Second separation section; 4. Separation nut; 5. Locking sleeve; 6. Lower outer shell; 7. Outer actuator cylinder; 8. Outer actuator cylinder end cap; 9. Outer actuator cylinder shaft; 10. End cap; 11. Base; 12. Upper outer shell; 13. Elastic element; 14. Limit screw; 15. Limit bead; 16. Guide bead pressure plate; 17. Guide bead; 18. Inner actuator cylinder. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figs. 1-3 As shown, a rocket stage interstage load-bearing separation integrated device includes a first separation section 2, a second separation section 3, a shell, fasteners, a radial limiting mechanism, and an actuation mechanism.

[0035] The housing is fixedly connected to the second separation section 3, and has an installation cavity inside; the radial limiting mechanism and the actuating mechanism are both located in the installation cavity.

[0036] The first separating section 2 and the second separating section 3 are detachably fixedly connected by fasteners. The fasteners include a butt bolt 1 and a separating nut 4. The separating nut 4 is disposed in the mounting cavity and is a split nut that can be separated radially and can be in a locked state and a disassembled state.

[0037] When the release nut 4 is in the locked state, it is threadedly connected to the threaded engagement area of ​​the mating bolt 1. When the release nut 4 is in the disassembled state, the mating bolt 1 is disengaged from the release nut 4 and has the ability to move axially away from the threaded connection area under the action of external force.

[0038] The radial limiting mechanism is configured to keep the release nut 4 in a stable locked state.

[0039] The actuating mechanism is configured to drive the radial limiting mechanism to move through its motion, so that the release nut 4 changes from a stable locked state to a disassembled state.

[0040] Specifically, in this embodiment, the housing includes an upper outer shell 12 and a lower outer shell 6 that are fixedly connected to each other and are internally interconnected to form an installation cavity. The end cap 10 is fixedly connected to the lower outer shell 6 to close the installation cavity.

[0041] The radial limiting mechanism includes a locking sleeve 5, which is disposed within the mounting cavity. The locking sleeve 5 includes a receiving cavity capable of accommodating a release nut 4, which is disposed within the receiving cavity.

[0042] The locking sleeve 5 has a movable gap between its axial end and the inner wall of the housing. The locking sleeve 5 can be in a first position and a second position. When the locking sleeve 5 is in the first position, the release nut 4 radially limits the release nut 4, so that the release nut 4 is in a locked state. When the locking sleeve 5 is in the second position, the release nut 4 is released from the radial limit on the release nut 4, and the release nut 4 can be in a disassembled state.

[0043] The radial limiting mechanism includes an elastic element 13 for axially limiting the locking sleeve 5, so that the locking sleeve 5 is stably in a first position. The elastic element 13 is disposed in the mounting cavity and is located in the gap between the axial end of the locking sleeve 5 and the inner wall of the housing.

[0044] The elastic element 13 is preferably a compression spring.

[0045] The release nut 4 includes a groove on its outer circumference; the locking sleeve 5 includes a protrusion that can be inserted into the groove; when the locking sleeve 5 is in a first position, the protrusion abuts against the non-grooved position of the release nut 4; when the locking sleeve 5 is in a second position, the protrusion is inserted into the groove.

[0046] In another embodiment of the present invention, the radial limiting mechanism further includes a limiting bead 15 disposed on the protrusion, the limiting bead 15 being fixedly connected to the locking sleeve 5 by a limiting screw 14. The limiting bead 15 partially protrudes from the surface of the protrusion. The separating nut 4 includes a ball socket disposed on its outer circumference, and the position of the ball socket does not coincide with the position of the groove. When the locking sleeve 5 is in the first position, the limiting bead 15 is located in the ball socket, further limiting and fixing the locking sleeve 5 and the separating nut 4, ensuring the stability between the two.

[0047] The actuating mechanism includes an outer actuating cylinder 7 for pushing the locking sleeve 5 from a first position to a second position; the outer actuating cylinder 7 is slidably disposed in the mounting cavity. An ejector ring is provided at the end of the outer actuating cylinder 7 near the locking sleeve 5, and the inner diameter of the ejector ring is larger than the maximum outer diameter of the release nut 4, so that it can effectively push the locking sleeve 5.

[0048] The separating nut 4 is provided with a second conical groove on one end near the outer actuator cylinder 7, and the outer actuator cylinder 7 is provided with a second conical part that is adapted to the second conical groove on one end near the separating nut 4.

[0049] In another embodiment of the present invention, the actuation mechanism further includes an outer actuation cylinder shaft 9 for guiding the outer actuation cylinder 7. The bottom end of the outer actuation cylinder 7 is open, and an outer actuation cylinder end cap 8 is fixedly connected to this end. The outer actuation cylinder end cap 8 is provided with a circular opening that corresponds to the outer actuation cylinder shaft 9, and the outer actuation cylinder end cap 8 is fitted onto the outer circumference of the outer actuation cylinder shaft 9 through this circular opening. The outer actuation cylinder shaft 9 can guide the outer actuation cylinder 7, ensuring the accuracy of its movement trajectory and preventing deviation.

[0050] Furthermore, the actuating mechanism also includes an inner actuating cylinder 18 for pushing the mating bolt 1 out of the release nut 4.

[0051] Furthermore, the end of the inner actuator cylinder 18 near the end of the mating bolt 1 has a guide bead pressure plate 16 and a guide bead 17, and the end of the mating bolt 1 near the end of the inner actuator cylinder 18 has a hemispherical groove that can cooperate with the guide bead 17 to guide the mating bolt 1 to disengage.

[0052] As another embodiment of the present invention, a rocket stage bearing separation integrated device further includes a base 11 fixedly connected to the second separation section 3. The separation nut 4 is provided with a first conical groove on one end near the base 11. The base 11 is provided with a first conical part that can adapt to the first conical groove. By relying on the cooperation between the first conical part and the first conical groove, the separation nut 4 can be separated, thereby improving its separation success rate.

[0053] As another embodiment of the present invention, a rocket stage inter-bearing separation integrated device further includes a pressure plate for fixing the docking bolt 1 to the first separation section 2. Under the fixing action of the pressure plate, the docking bolt 1 and the first separation section 2 are fixedly connected and can move synchronously to improve the unlocking effect.

[0054] Before separation begins, the entire system is in a self-locking state. At this time, the two separation nuts 4 are in a stable state under the shape restriction of the locking sleeve 5. At this time, the section docking connection operation is very simple; just tighten the docking bolt 1 in the same way as ordinary bolts.

[0055] During the separation of the launch vehicle stages, an external gas source supplies gas to the interior through a nozzle on the lower outer shell 6. The gas creates internal pressure, pushing the outer actuator 7 to move axially. As the outer actuator 7 moves, it first pushes the locking sleeve 5 upwards axially. When it reaches a preset position, the central conical surface of the outer actuator 7 presses against the separation nut 4, causing it to separate to both sides. The threads disengage, unlocking the system. Fig. 2 As shown.

[0056] Furthermore, the air vents on the end cap 10 are inflated, causing the inner cavity of the inner actuator cylinder 18 to begin inflating. The air pressure pushes the inner actuator cylinder 18 to move. When it reaches the end face of the connecting bolt 1, the end face of the connecting bolt 1 moves and pushes the connecting bolt 1 out, entering the separation state. Fig. 3 As shown.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rocket stage interstage load-bearing separation integrated device, comprising a first separation section (2) and a second separation section (3), characterized in that, Also includes: Housing, fasteners, radial limiting mechanism, and actuating mechanism; The housing has an internal mounting cavity; both the radial limiting mechanism and the actuating mechanism are disposed within the mounting cavity; The first separation section (2) and the second separation section (3) are detachably fixedly connected by the fasteners; the fasteners include a butt bolt (1) and a separation nut (4); the separation nut (4) is disposed in the mounting cavity, and the separation nut (4) is a split nut that can be separated radially, and can be in a locked state and a disassembled state; When the release nut (4) is in the locked state, the release nut (4) is threadedly connected to the thread engagement area of ​​the mating bolt (1); When the separating nut (4) is in the disassembled state, the mating bolt (1) is disengaged from the separating nut (4) and has the ability to move away from the threaded connection area along its axial direction under the action of external force; The radial limiting mechanism is configured to keep the separating nut (4) in a stable locked state; The actuating mechanism is configured to drive the radial limiting mechanism to move through its motion, so that the separating nut (4) changes from a stable locked state to a disassembled state.

2. The integrated rocket stage load-bearing separation device as described in claim 1, characterized in that, The radial limiting mechanism includes a locking sleeve (5); the locking sleeve (5) is disposed in the mounting cavity; the locking sleeve (5) includes a receiving cavity capable of accommodating the separating nut (4); the separating nut (4) is disposed in the receiving cavity; The locking sleeve (5) has a movable gap between its axial end and the inner wall of the housing, and the locking sleeve (5) can be in a first position and a second position. When the locking sleeve (5) is in the first position, the release nut (4) radially limits the release nut (4), so that the release nut (4) is in a locked state. When the locking sleeve (5) is in the second position, the release nut (4) is released from the radial limit on the release nut (4), and the release nut (4) can be in a disassembled state.

3. The integrated rocket stage load-bearing separation device as described in claim 2, characterized in that, The radial limiting mechanism includes an elastic element (13) for axially limiting the locking sleeve (5) so that the locking sleeve (5) is stably in a first position; the elastic element (13) is disposed in the mounting cavity and is located in the gap between the axial end of the locking sleeve (5) and the inner wall of the housing.

4. The integrated rocket stage load-bearing separation device as described in claim 2 or 3, characterized in that, The release nut (4) includes a groove disposed on its outer circumference; the locking sleeve (5) includes a protrusion that can be inserted into the groove; when the locking sleeve (5) is in the first position, the protrusion abuts against the non-groove position of the release nut (4); When the locking sleeve (5) is in the second position, the protrusion is inserted into the groove.

5. The integrated rocket stage load-bearing separation device as described in claim 4, characterized in that, The radial limiting mechanism further includes a limiting bead (15) disposed on the protrusion; the limiting bead (15) is fixedly connected to the locking sleeve (5) by a limiting screw (14); the limiting bead (15) protrudes from the surface of the protrusion; the separating nut (4) includes a ball socket disposed on its outer circumference; the position of the ball socket does not coincide with the position of the groove; when the locking sleeve (5) is in the first position, the limiting bead (15) is located in the ball socket.

6. The integrated rocket stage load-bearing separation device as described in claim 4, characterized in that, The actuating mechanism includes an outer actuating cylinder (7) for pushing the locking sleeve (5) from a first position to a second position; the outer actuating cylinder (7) is slidably disposed in the mounting cavity; an ejector ring is provided at the end of the outer actuating cylinder (7) near the locking sleeve (5); the inner diameter of the ejector ring is larger than the maximum outer diameter of the release nut (4).

7. The integrated rocket stage load-bearing separation device as described in claim 6, characterized in that, The separating nut (4) is provided with a second conical groove on one end near the outer actuator cylinder (7); the outer actuator cylinder (7) is provided with a second conical part that is adapted to the second conical groove on one end near the separating nut (4).

8. The integrated rocket stage load-bearing separation device as described in claim 6, characterized in that, The actuation mechanism also includes an outer actuation cylinder shaft (9) for guiding the outer actuation cylinder (7).

9. The integrated rocket stage load-bearing separation device as described in claim 6, characterized in that, The actuating mechanism also includes an inner actuating cylinder (18) for pushing the mating bolt (1) out of the release nut (4).

10. The integrated rocket stage load-bearing separation device as described in claim 1, characterized in that, It also includes a base (11) fixedly connected to the second separation section (3); the separation nut (4) is provided with a first conical groove on one end near the base (11); the base (11) is provided with a first conical part that can adapt to the first conical groove.

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