Ignition powder damping structure for solid engine ignition device

Abstract

The ignition powder damping structure for the solid engine ignition device comprises a damping support and a damping ring, the damping support is a cylindrical body, the top end face, the bottom end face and the cylindrical face of the cylindrical body are each of a hollowed-out structure, ignition powder is placed in the cylindrical body, and the inner shape face of the cylindrical body is matched with the outer shape face of the ignition powder; the damping ring is an annular body matched with the cross section of the damping support in shape. The damping support is installed in a shell of the ignition device, and the damping ring is installed between the damping support and a top cover of the ignition device. According to the technical scheme, the ignition powder of the ignition device can be prevented from being damaged by cracks, fragmentation and the like due to vibration, impact, overload and the like under the transportation and use working conditions, and the structural integrity of the ignition powder of the ignition device is ensured.

Description

Technical Field

[0001] The utility model relates to the field of solid rocket engines, in particular to an ignition powder shock-absorbing structure used for a solid engine ignition device. Background Art

[0002] The ignition device is an important component of a solid rocket engine. Its main function is to reliably ignite when the engine needs to work, and to ensure that it meets the requirements of environmental conditions such as vibration, impact, and overload during daily transportation and use. Before starting the ignition action, its structure (including the ignition powder) cannot produce cracks or fragmentation and other damage. The ignition device is mainly composed of a shell, ignition powder, and a top cover. The ignition powder is a non-metallic material. Its structural integrity in the shell is related to the reliable realization of the ignition function of the ignition device. If cracks, fragments, and other damage occur during transportation and related environmental conditions, it may cause a sudden increase in the ignition powder surface, and the output performance deviates from the design expectations, causing abnormalities in the ignition process. In severe cases, it may cause ignition failure, resulting in economic and time costs for the engine and rocket. Utility Model Content

[0003] The technical problem solved by the utility model is: to overcome the deficiencies of the prior art and to provide an ignition powder shock-absorbing structure for a solid engine ignition device, especially a shock-absorbing structure between a shell, a top cover and the ignition powder, so as to prevent the ignition powder of the ignition device from being damaged by cracks and fragments due to vibration, impact, overload and other working conditions during transportation and use, thereby ensuring the structural integrity of the ignition powder of the ignition device.

[0004] The technical solution of the utility model is: an ignition powder shock-absorbing structure for a solid engine ignition device, comprising a shock-absorbing bracket and a shock-absorbing ring, the shock-absorbing bracket is a cylindrical body, the top and bottom end faces and the cylindrical surface of the cylindrical body are all hollow structures, the interior is used to place the ignition powder and the inner surface and the outer surface of the ignition powder cooperate with each other; the shock-absorbing ring is an annular body matching the cross-sectional shape of the shock-absorbing bracket; the shock-absorbing bracket is installed in the shell of the ignition device, and the shock-absorbing ring is installed between the shock-absorbing bracket and the top cover of the ignition device.

[0005] Furthermore, the shock absorbing bracket is a cylinder, and the shock absorbing ring is a ring.

[0006] Furthermore, the outer diameter of the cylinder of the shock-absorbing bracket is the same as the outer diameter of the circular ring of the shock-absorbing ring.

[0007] Furthermore, the bottom and top of the cylinder are circular ring structures, one or more supporting circular ring structures are arranged between the bottom and the top, and the circular ring structures are connected by multiple arc strips to form a hollow structure.

[0008] Furthermore, each arc-shaped strip has a cross section perpendicular to the axial direction of the shock-absorbing bracket that is an arc surface.

[0009] Furthermore, the hollow structure consists of three circular rings at the bottom, middle and top and twelve arc-shaped bars.

[0010] Furthermore, the outer shape of the bottom end surface of the shock-absorbing bracket matches the inner surface of the bottom of the shell of the ignition device.

[0011] Furthermore, the shock absorbing bracket and the shock absorbing ring are made of rubber material.

[0012] The advantages of the utility model compared with the prior art are:

[0013] 1) The ignition powder shock-absorbing structure for the solid engine ignition device designed by the utility model solves the problem of ignition powder structure damage caused by vibration, impact, overload and other working conditions during the transportation and use of the ignition device, ensures the structural integrity of the ignition powder, and provides the necessary conditions for the realization of the ignition function of the ignition device;

[0014] 2) The shock absorbing device designed in the utility model adopts a hole-shaped structure on both the end face and the cylindrical surface, which ensures reliable shock absorption while allowing the combustion gas to smoothly pass through the combustion gas hole of the ignition device housing after the ignition powder is ignited;

[0015] 3) The shock absorbing device designed by the utility model can adopt an integrated processing and compression molding process. The raw materials used in manufacturing are commonly used industrial rubber materials, and the production economy is good. At the same time, the rubber material used is also a combustible material, which will not have an adverse effect on the realization of the ignition function;

[0016] 4) The assembly process between the shock absorbing device designed by the utility model, the ignition powder, the ignition device housing, and the top cover is simple, without special and complicated processes and procedures, which is conducive to improving the consistency of assembly quality and the improvement of assembly efficiency;

[0017] 5) The shock absorbing device designed in the utility model eliminates the risk of potential safety hazards caused by the generation of agent debris when the ignition powder is in direct contact with rigid materials such as the shell and the top cover, thereby substantially improving the inherent safety of the ignition device throughout its entire service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a structural sectional view of the utility model;

[0020] Figure 3 This is an assembly diagram of the utility model with the shell, ignition powder and top cover. DETAILED DESCRIPTION

[0021] In order to better understand the technical solution of the present utility model, the embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1 , 2 As shown, the shock absorbing structure provided in this embodiment is composed of a shock absorbing bracket 1 and a shock absorbing ring 2, wherein the shock absorbing bracket is an integral cylindrical structure with holes, and is respectively composed of a bottom shock absorbing ring, a middle shock absorbing ring, a top shock absorbing ring, and 12 radial shock absorbing arc strips, each arc strip having a circular arc surface in a cross section perpendicular to the axial direction of the shock absorbing bracket, which is used for shock absorbing the bottom and radial direction of the ignition charge of the ignition device; the shock absorbing ring is annular, which is used for shock absorbing the top of the ignition charge of the ignition device. The outer cylindrical diameter of the shock absorbing bracket is the same as the outer diameter of the shock absorbing ring. The shock absorbing bracket and the shock absorbing ring are made of rubber material.

[0023] Preferably, the shock-absorbing bracket and the shock-absorbing ring are made of rubber that meets the performance requirements of grade 1164 rubber in GJB5037-2001 "Specifications for Aviation Rubber Sheets, Ropes, Tubes and Profiles".

[0024] When using, Figure 3 As shown, when the ignition device needs to be loaded, first bond the ignition powder 3 along the cylindrical end faces in sequence (if the ignition powder is an integral powder column structure, bonding is not required), and then load it into the shock-absorbing bracket 1, ensuring that the end face of the ignition powder 3 loaded into the shock-absorbing bracket is in close contact with the inner surface of the shock-absorbing ring at the bottom of the shock-absorbing bracket 1, and then load the assembled shock-absorbing bracket 1 and ignition powder 3 into the ignition device housing 4, ensuring that the bottom end face of the shock-absorbing bracket 1 is in close contact with the bottom inner surface of the housing 4 during assembly. Finally, place the shock-absorbing ring 2 on the exposed end face of the ignition powder 3 and the shock-absorbing bracket 1 assembly, install the top cover 5 and press the shock-absorbing ring 2 to complete the installation of the shock-absorbing device.

[0025] When the ignition device experiences transportation, vibration, impact, overload and other working conditions, the shock absorbing device can play a buffering role to avoid direct rigid collision between the ignition powder and the shell, so that the ignition powder structure remains intact, and ultimately ensures the reliable realization of the ignition function.

[0026] It is understood that the present invention is described by way of embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and embodiments that can fall within the scope of the claims of this application are within the scope of protection of the present invention.

[0027] The contents not described in detail in the utility model specification belong to the common knowledge of those skilled in the art.

Claims

1. An ignition charge shock absorbing structure for a solid engine ignition device, characterized in that: It includes a shock-absorbing bracket and a shock-absorbing ring. The shock-absorbing bracket is a cylindrical body. The top and bottom end faces and the cylindrical surface of the cylindrical body are all hollow structures. The interior is used to place ignition powder, and the inner surface and the outer surface of the ignition powder match each other. The shock-absorbing ring is an annular body that matches the cross-sectional shape of the shock-absorbing bracket. The shock-absorbing bracket is installed in the shell of the ignition device, and the shock-absorbing ring is installed between the shock-absorbing bracket and the top cover of the ignition device.

2. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 1, characterized in that: The shock-absorbing bracket is a cylinder, and the shock-absorbing ring is a ring.

3. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 2, characterized in that: The outer diameter of the cylinder of the shock-absorbing bracket is the same as the outer diameter of the circular ring of the shock-absorbing ring.

4. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 2, characterized in that: The bottom and top of the cylinder are circular ring structures, one or more supporting circular ring structures are arranged between the bottom and the top, and the circular ring structures are connected by multiple arc strips to form a hollow structure.

5. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 4, characterized in that: The cross section of each arc strip perpendicular to the axial direction of the shock-absorbing bracket is an arc surface.

6. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 4, characterized in that: The hollow structure consists of three circular rings at the bottom, middle and top and twelve arc-shaped bars.

7. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 1, characterized in that: The outer shape surface of the bottom end surface of the shock-absorbing bracket matches with the inner surface of the bottom of the shell of the ignition device.

8. The ignition charge shock absorbing structure for a solid motor ignition device according to claim 1, characterized in that: The shock-absorbing bracket and the shock-absorbing ring are made of rubber material.

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