High-temperature-resistant split type easy-to-fall interstage separation structure

Abstract

The invention provides a high-temperature-resistant split type easy-to-fall interstage separation structure which comprises a front cabin, a rear cabin, a front cover plate, a rear cover plate and an interstage separation device, the front cover plate and the rear cover plate are both multi-petal type cover plates, the rear end of the front cabin is fixedly connected with the front end of the rear cabin, the front end of the front cover plate is embedded in the outer side of the front cabin, the rear cover plate is fixedly installed on the outer side of the front cabin, and the interstage separation device is fixedly connected with the front cover plate. The front end of the rear cover plate tightly presses the rear end of the front cover plate, a first cavity is formed between the front cover plate and the forecabin, a second cavity is formed between the rear cover plate and the forecabin, and the interstage separation device is installed on the inner side of the forecabin and corresponds to the first cavity. Reliable connection of the front cabin and the rear cabin is achieved through a simple structure, high-temperature loads can be borne through pressing fit of the front cover plate and the rear cover plate, the inter-stage separation device only needs to cut a small number of the rear end of the front cabin, the occupied space of the inter-stage separation device is reduced, the front cover plate can rapidly fall off after losing constraint, inter-stage rapid separation can be achieved, and the service life of the inter-stage separation device is prolonged. And the interstage separation efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of aircraft body structures, and in particular to a high-temperature resistant petal-type easily detachable inter-stage separation structure. Background Art

[0002] Interstage separation is the process by which the lower stage of a multi-stage vehicle separates from the upper stage after it is shut down, with the purpose of separating and discarding the propellant-depleted stage.

[0003] The existing Chinese patent with publication number CN113883972A discloses an interstage separation device suitable for small-diameter aircraft, which is composed of a connection unlocking device and a separation impulse device, and can be widely used in small-diameter aircraft such as multi-stage rockets and multi-stage target missiles. When the aircraft is flying, the interstage separation device realizes the connection and separation of the booster stage and the upper stage. The connection unlocking device mainly includes an upper stage connection cabin, a lower stage connection cabin, an unlocking top plate, a steel ball, an explosive bolt, a ball pad, and a locking nut; the separation impulse device is mainly a cylindrical spring.

[0004] The development of modern science and technology has put forward new requirements for the separation of aircraft stages. The explosive bolt connection form of the traditional stage separation connection occupies a large space. Therefore, it is necessary to propose a high-temperature resistant split-petal easy-to-detach stage separation structure in response to the new requirements of small space occupation and high temperature resistance. It has a simple structure, high connection reliability, can withstand high temperature loads, and is easy to separate the stages. Summary of the invention

[0005] In view of the defects in the prior art, the object of the present invention is to provide a high temperature resistant petal-type easy-to-detach inter-stage separation structure.

[0006] According to the present invention, a high-temperature resistant split-petal easy-to-detach inter-stage separation structure is provided, comprising: a front cabin, a rear cabin, a front cover plate, a rear cover plate and an inter-stage separation device, the front cover plate and the rear cover plate are both multi-petal covers, the rear end of the front cabin is fastened to the front end of the rear cabin, the front end of the front cover plate is embedded in the outside of the front cabin, the rear cover plate is fastened to the outside of the front cabin, and the front end of the rear cover plate presses the rear end of the front cover plate, a first cavity is formed between the front cover plate and the front cabin, a second cavity is formed between the rear cover plate and the front cabin, and the inter-stage separation device is installed on the inside of the front cabin and is arranged corresponding to the first cavity.

[0007] Preferably, outer sides of the front cover plate and the rear cover plate are both inclined surfaces, and the inclination of the inclined surfaces is consistent with the outer side surface of the front end of the rear cabin, and the rear cover plate is smoothly connected with the rear cabin.

[0008] Preferably, the rear cover plate comprises a plurality of rear sub-cover plates combined to form a circumference, and there is no mechanical connection between any of the rear sub-cover plates.

[0009] Preferably, the front end of any of the rear sub-cover plates is fastened to the front cabin by a first screw, and the first screw is arranged on the rear side of the inter-stage separation device, and the rear end of any of the rear sub-cover plates is fastened to the rear end of the front cabin by a second screw.

[0010] Preferably, a protrusion is formed at the front end of the rear cover plate, and a corner matching the protrusion is provided at the rear end of the front cover plate, and the rear cover plate is pressed against the front cover plate via the protrusion.

[0011] Preferably, the front cover plates are combined to form a circumferential multi-petal front sub-cover plate, and there is no mechanical connection between any of the front sub-cover plates.

[0012] Preferably, an inclined slot is provided on the front compartment, the front end of any front sub-cover plate is clamped in the inclined slot, and the rear end of any front sub-cover plate is pressed by the rear cover plate.

[0013] Preferably, the inter-stage separation device includes an initial state and a detonation state. When the inter-stage separation device is in the detonation state, the rear end of the front cabin is cut, the rear cover plate and the rear cabin are separated from the front cabin, and the petals of the front cover plate fall off.

[0014] Preferably, the front cover plate includes 10 front sub-cover plates, and the rear cover plate includes 2 rear sub-cover plates.

[0015] Preferably, the inter-stage separation device is fastened to the front cabin via radial screws, and the front cabin is fastened to the rear cabin via axial screws.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention realizes reliable connection between the front cabin and the rear cabin through a simple structure. Through the compression fit of the front cover plate and the rear cover plate, it can withstand high temperature loads. The interstage separation device only needs to cut a small amount of the rear end of the front cabin, which helps to reduce the occupied space of the interstage separation device. The front cover plate can fall off quickly when it loses its constraint, which can realize rapid separation between stages and help improve the interstage separation efficiency.

[0018] 2. The present invention adopts a front cover plate formed by combining multiple front cover plates to form a circumference, and adopts a rear cover plate formed by combining multiple rear cover plates to form a circumference, and there is no mechanical connection between the petals. After the interstage separation device is detonated, the rear end of the front cabin is cut, and the petals automatically fall off after the front cover plate loses the restraint of the rear cover plate. Interstage separation can be achieved through a simple structure, which helps to reduce the use of the interstage separation device and thus improve the interstage separation efficiency.

[0019] 3. The present invention forms an inclined surface through the front cover plate and the rear cover plate to cover the part of the front cabin where the inter-stage separation device is located, and the first cavity and the second cavity formed between the inclined surface and the front cabin can withstand high temperature environment, have a simple structure, and help improve connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 It is a structural schematic diagram of a high temperature resistant petal-type easy-to-fall-off inter-stage separation structure mainly embodied in the present invention.

[0022] As shown in the figure:

[0023] Front cabin 1 Rear cabin 2 Front cover 3

[0024] Rear cover 4 Inter-stage separation device 5 First screw 6

[0025] Second screw 6 DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0027] like Figure 1 As shown, a high-temperature resistant petal-type easy-to-detach inter-stage separation structure provided according to the present invention includes: a front cabin 1, a rear cabin 2, a front cover plate 3, a rear cover plate 4 and an inter-stage separation device 5, the front cover plate 3 and the rear cover plate 4 are both multi-petal covers, the rear end of the front cabin 1 is fastened to the front end of the rear cabin 2, the front end of the front cover plate 3 is embedded in the outside of the front cabin 1, the rear cover plate 4 is fastened to the outside of the front cabin 1, and the front end of the rear cover plate 4 is pressed against the rear end of the front cover plate 3, a first cavity is formed between the front cover plate 3 and the front cabin 1, a second cavity is formed between the rear cover plate 4 and the front cabin 1, and the inter-stage separation device 5 is installed on the inner side of the front cabin 1 and is arranged corresponding to the first cavity.

[0028] The front cabin 1 is fastened to the rear cabin 2 by axial screws. The interstage separation device 5 is fastened to the front cabin 1 by radial screws.

[0029] The front cover plate 3 is combined to form a multi-petal front sub-cover plate of a circle, and there is no mechanical connection between any of the front sub-cover plates. In order to facilitate separation, the front cover plate 3 is preferably a 10-petal front sub-cover plate, and the 10 petals form a circle, and there is no mechanical connection between the petals, and the front end of each petal is clamped on the front cabin 1. The front cabin 1 is provided with an inclined slot, and the front end of any front sub-cover plate is clamped in the inclined slot, and the rear end of any front sub-cover plate is pressed by the rear cover plate 4. As long as the front cover plate 3 is reliably fixed, the inclination angle of the inclined slot can be customized, and the depth of the inclined slot is not too small. A protrusion is formed at the front end of the rear cover plate 4, and a corner matching the protrusion is provided at the rear end of the front cover plate 3, and the rear cover plate 4 presses the front cover plate 3 through the protrusion.

[0030] The rear cover plate 4 includes a plurality of rear sub-cover plates combined to form a circumference, and there is no mechanical connection between any of the rear sub-cover plates. In order to facilitate processing and installation, the rear cover plate 4 is preferably a two-petal rear sub-cover plate, and the two petals form a circumference. There is no mechanical connection between the petals, and each petal is connected to the front cabin 1 through two rows of radial screws. The front end of any rear sub-cover plate is fastened to the front cabin 1 through the first screw 6, and the first screw 6 is arranged on the rear side of the inter-stage separation device 5, and the rear end of any rear sub-cover plate is fastened to the rear end of the front cabin 1 through the second screw 7.

[0031] The outer sides of the front cover plate 3 and the rear cover plate 4 are both inclined surfaces, and the inclination of the inclined surfaces is consistent with the outer side surface of the front end of the rear cabin 2, and the rear cover plate 4 is smoothly connected with the rear cabin 2. The inclined surface formed by the front cover plate 3 and the rear cover plate 4 covers the part of the front cabin 1 where the interstage separation device 5 is located; the first cavity and the second cavity formed between the inclined surface and the front cabin can withstand high temperature environment, and the outer wall temperature is generally 800-1200℃.

[0032] The inter-stage separation device 5 includes an initial state and a detonation state. When the inter-stage separation device 5 is in the detonation state, that is, the inter-stage separation device 5 is detonated after receiving a signal, the rear end of the front cabin 1 is cut, and the rear cover plate 4 and the rear cabin 2 are separated from the front cabin 1 under the action of aerodynamic force. After losing the constraint of the rear cover plate 4, the petals of the front cover plate 3 automatically fall off, and the stages are successfully separated.

[0033] The present application can reliably connect the front cabin 1 and the rear cabin 2, occupies a small space, has a simple structure, has high connection reliability, can withstand high temperature loads, and is easy to separate between stages.

[0034] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A high temperature resistant petal-type easy-to-fall-off inter-stage separation structure, characterized in that: include: A front cabin (1), a rear cabin (2), a front cover plate (3), a rear cover plate (4) and an inter-stage separation device (5), wherein the front cover plate (3) and the rear cover plate (4) are both multi-petal cover plates, the rear end of the front cabin (1) is fastened to the front end of the rear cabin (2), the front end of the front cover plate (3) is embedded in the outer side of the front cabin (1), the rear cover plate (4) is fastened to the outer side of the front cabin (1), and the front end of the rear cover plate (4) presses the rear end of the front cover plate (3), a first cavity is formed between the front cover plate (3) and the front cabin (1), a second cavity is formed between the rear cover plate (4) and the front cabin (1), and the inter-stage separation device (5) is installed on the inner side of the front cabin (1) and is arranged corresponding to the first cavity.

2. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The outer sides of the front cover plate (3) and the rear cover plate (4) are both inclined surfaces, and the inclination of the inclined surfaces is consistent with the outer side surface of the front end of the rear cabin (2), and the rear cover plate (4) is smoothly connected with the rear cabin (2).

3. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The rear cover plate (4) comprises a plurality of rear sub-cover plates which are combined to form a circumference, and there is no mechanical connection between any of the rear sub-cover plates.

4. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 3, characterized in that: The front end of any of the rear sub-cover plates is fastened to the front cabin (1) by means of a first screw (6), and the first screw (6) is arranged on the rear side of the inter-stage separation device (5), and the rear end of any of the rear sub-cover plates is fastened to the rear end of the front cabin (1) by means of a second screw (7).

5. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: A protrusion is formed at the front end of the rear cover plate (4), and a corner matching the protrusion is provided at the rear end of the front cover plate (3), and the rear cover plate (4) is pressed against the front cover plate (3) via the protrusion.

6. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The front cover plates (3) are combined to form a circumferential multi-petal front sub-cover plate, and there is no mechanical connection between any of the front sub-cover plates.

7. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 6, characterized in that: The front compartment (1) is provided with an inclined slot, the front end of any front sub-cover plate is clamped in the inclined slot, and the rear end of any front sub-cover plate is pressed by the rear cover plate (4).

8. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The inter-stage separation device (5) includes an initial state and a detonation state. When the inter-stage separation device (5) is in the detonation state, the rear end of the front cabin (1) is cut, the rear cover plate (4) and the rear cabin (2) are separated from the front cabin (1), and the petals of the front cover plate (3) fall off.

9. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The front cover plate (3) comprises 10 front sub-cover plates, and the rear cover plate (4) comprises 2 rear sub-cover plates.

10. The high temperature resistant petal-type easy-to-fall-off inter-stage separation structure according to claim 1, characterized in that: The inter-stage separation device (5) is fastened to the front cabin (1) via radial screws, and the front cabin (1) is fastened to the rear cabin (2) via axial screws.

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