A combined structure of a solid rocket motor center-loading charge column and a radial ignition device

Abstract

A combined structure of a centrally loaded charge and a radial ignition device for a solid rocket motor comprises a centrally loaded charge, a rear support, an ignition enhancement cartridge, and an embedded safety ignition device. The embedded safety ignition device adopts a radial ignition design and is fixedly connected to the front end of the centrally loaded charge. The rear end of the centrally loaded charge is connected to the ignition enhancement cartridge to improve ignition characteristics. The charge structure consisting of the centrally loaded charge, the ignition enhancement cartridge, and the embedded safety ignition device is annularly supported by the rear support to provide rigidity and a gas channel during ignition. The centrally loaded charge and the wall-attached charge together realize a combined charge structure, and reliable ignition is achieved through the annular channel.

Description

Technical Field

[0001] The invention relates to a combined structure of a solid motor central loading charge column and a radial ignition device, belonging to the field of solid rocket motors. Background Art

[0002] As the requirements for comprehensive performance such as missile range and environmental adaptability continue to increase, higher requirements are placed on the energy density of solid rocket engines. Achieving a higher propellant loading ratio in a limited envelope space and obtaining stronger power characteristics have become the inevitable way to improve their comprehensive performance.

[0003] Current solid motors typically use an internal bore tube propellant structure to achieve the required thrust characteristics. Especially for solid boosters that require high initial thrust under extreme ambient temperature conditions, the number of m of the grains cast against the wall is limited to a certain range to ensure structural integrity during combustion and ensure normal operation. To increase the energy density of the engine, a large number of m-tube propellants is generally required, which conflicts with the structural integrity requirements of low-temperature conditions. Relying solely on the conventional internal bore tube propellant configuration, the central space cannot be fully utilized, and the propellant filling ratio cannot be further increased, which restricts the improvement of the overall performance of the engine. Summary of the Invention

[0004] The technical problem solved by the present invention is: in view of the problem that the traditional inner bore tube propellant type structural design in the current existing technology cannot take into account the structural integrity of low temperature working conditions and the propellant filling ratio and engine performance, a combined structure of a solid engine central loading column and a radial ignition device is proposed.

[0005] The present invention solves the above technical problems by the following technical solutions:

[0006] A combined structure of a solid rocket motor center-loaded grain and a radial ignition device includes a center-loaded grain, a rear support, an ignition enhancement cartridge, and an embedded safety ignition device, wherein:

[0007] The embedded safety ignition device adopts a radial ignition design and is fixedly connected to the front end of the center-loaded powder column. The rear end of the center-loaded powder column is connected to the ignition enhancement box to improve the ignition characteristics. The powder column structure composed of the center-loaded powder column, the ignition enhancement box, and the embedded safety ignition device is annularly supported by the rear bracket to provide rigidity and a flow field channel during ignition.

[0008] The embedded safety ignition device is fixedly connected to the front end of the center-loaded powder column by radial screws or radial pins. A thermal protection retaining ring is provided at the connection to cover the connection surface for thermal protection. A curing glue layer is provided at the connection between the center-loaded powder column and the ignition enhancement box to enhance the connection strength between the ignition enhancement box and the center-loaded powder column.

[0009] The interior of the central loading charge is provided with a central support structure, a charge, an adhesive layer, and a combustion-limiting insulation layer. The charge is formed on the central support structure, and an adhesive layer is provided at the contact interface between the charge and the central support structure for isolation. After the central support structure, charge, and adhesive layer are set, the outer circle of the charge and the tail end combustion surface can be designed as a combustion surface or a non-combustion surface according to the design requirements of the interior ballistic performance.

[0010] After the embedded safety ignition device is ignited, the central charge column ignites and emits radial gas, which penetrates the annular channel formed by the charge column, the central support structure and the rear support to achieve reliable ignition, and the ignition enhancement cartridge enhances the ignition effect;

[0011] This also includes wall-mounted powder columns, which ignite and spray out gas together with the center-loaded powder columns.

[0012] The central support structure is provided with a front joint and a rear joint, and the wall-attached charge is additionally cast and formed at the upper front joint and rear joint of the central support structure. The wall-attached charge is formed into a cylinder, a truncated cone or an irregular structure according to the internal ballistic performance, and the outer circular surface or the axial end surface forming part of the charge is the burning surface.

[0013] The burning rates of the wall-attached grain and the center-loaded grain are matched with each other, and the wall-attached grain and the center-loaded grain together constitute a combined charge structure. The wall-attached grain and the center-loaded grain reserve space to form an annular gas channel to avoid flow congestion, and after ignition, erosive combustion is used to further adjust the burning surface increment to achieve optimization of the ignition thrust characteristics.

[0014] The embedded safety ignition device is integrally connected to the central support structure, and radial ignition is achieved through the radial ignition holes provided on the embedded safety ignition device. The combined structure consisting of the central loading powder column, the rear bracket, the ignition enhancement box, and the embedded safety ignition device is installed on the engine combustion chamber head, and the rear bracket is socketed with the central support structure and docked with the leading edge of the nozzle through a flexible lining layer.

[0015] The outer circular surface and end surface of the central support structure can be designed as a burning surface or a non-burning surface according to the internal ballistic requirements. The non-burning surface is realized by brushing a lining layer or covering it with an insulation layer.

[0016] The central support structure adopts metal or non-metallic tubes, rods or special-shaped structural parts that meet the load requirements as the skeleton support of the central loading charge. After the embedded safety ignition device is ignited, reliable ignition is achieved through the annular gas channel formed by the wall-attached charge and the central loading charge.

[0017] An ignition enhancement box is added to the tail end of the central loading column according to the free volume requirement to improve the ignition response characteristics. The rear bracket is connected to the central support structure to form a rigid support structure that passes through the central loading column, which is used to improve the mechanical environment adaptability of the combined structure.

[0018] The advantages of the present invention compared with the prior art are:

[0019] (1) The present invention provides a combination structure of a central loading charge column and a radial ignition device for a solid motor. In view of the problem of insufficient utilization of the central channel space in the bore tube propellant configuration of a solid motor, the combination structure of the central loading charge column and the radial ignition device can effectively utilize the space, increase the propellant loading coefficient, and enhance the energy density of the motor. At the same time, the combination structure of the central loading charge column and the radial ignition device can increase the means of regulating the combustion surface of the engine performance through reasonable matching of the burning rate and the erosion combustion law of the annular channel, and can supplement and optimize the engine thrust performance to a certain extent.

[0020] (2) The present invention adopts a central charge that is integrated with the central frame and the rear support frame through the head ignition device, which can ensure the environmental adaptability of the charge and enhance the environmental adaptability of the engine. Due to the increase of the central charge, the number of charge sticking to the combustion chamber wall can be appropriately reduced while meeting the energy density, so as to improve the overall environmental adaptability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the layout principle of the engine with a combined structure of a solid motor center-loaded grain column and a radial ignition device provided by the invention;

[0022] Figure 2 A schematic diagram of the combined structure of the solid motor central grain assembly and the rear support provided by the invention;

[0023] Figure 3 A schematic diagram of the central charge assembly of the radial ignition device provided by the invention;

[0024] Figure 4 A schematic diagram of the central charge column assembly provided for the invention;

[0025] Figure 5 Schematic diagram of the radial ignition device and tail reinforcement cartridge provided for the invention;

[0026] Figure 6 A schematic diagram of the rear support provided for the invention; DETAILED DESCRIPTION

[0027] A combined structure of a centrally loaded charge and a radial ignition device for a solid rocket motor comprises a centrally loaded charge, a rear support, an ignition enhancement cartridge, and an embedded safety ignition device. The embedded safety ignition device adopts a radial ignition design and is fixedly connected to the front end of the centrally loaded charge. The rear end of the centrally loaded charge is connected to the ignition enhancement cartridge to improve ignition characteristics. The charge structure consisting of the centrally loaded charge, the ignition enhancement cartridge, and the embedded safety ignition device is annularly supported by the rear support to provide rigidity and a flow field channel during ignition. The centrally loaded charge and the wall-attached charge jointly realize a combined charge structure, and reliable ignition is achieved through the annular channel.

[0028] Among them, the embedded safety ignition device is fixedly connected to the front end of the center-loading charge column by radial screws. An elastic heat protection ring is provided at the connection to cover the connection surface for thermal protection. A curing glue layer is provided at the connection between the center-loading charge column and the ignition enhancement cartridge to enhance the connection strength between the ignition enhancement cartridge and the center-loading charge column.

[0029] The embedded safety ignition device is fixedly connected to the front end of the center-loading charge column by radial screws. An elastic heat protection ring is provided at the connection to cover the connection surface for thermal protection. A curing adhesive layer is provided at the connection between the center-loading charge column and the ignition enhancement cartridge to enhance the connection strength between the ignition enhancement cartridge and the center-loading charge column.

[0030] After the embedded safety ignition device is ignited, the central charge column ignites and emits radial gas, which penetrates the annular channel formed by the charge column, the central support structure and the rear bracket to achieve reliable ignition. The ignition enhancement cartridge enhances the ignition effect.

[0031] Among them, it also includes the wall-mounted grain, which ignites and ejects gas together with the central loading grain;

[0032] The central support structure is provided with a front joint and a rear joint, and the wall-attached grain is additionally cast and formed at the upper front joint and the rear joint of the central support structure. The wall-attached grain is formed into a cylinder, a truncated cone or a special-shaped structure according to the internal ballistic performance, and the outer circular surface or the axial end surface of the grain is formed as the burning surface;

[0033] The burning rates of the wall-attached and center-loaded grains are matched, and together they form a combined charge structure. Space between the wall-attached and center-loaded grains forms an annular gas channel to avoid flow congestion. After ignition, erosive combustion is used to further adjust the burning surface increment to achieve optimized ignition thrust characteristics.

[0034] The embedded safety ignition device is integrally connected to the central support structure, and radial ignition is achieved through the radial ignition holes set on the embedded safety ignition device. The combined structure consisting of the central loading column, rear bracket, ignition enhancement cartridge, and embedded safety ignition device is installed on the engine combustion chamber head. The rear bracket is sleeved with the central support structure and connected to the leading edge of the nozzle through a flexible rubber layer.

[0035] The outer circular surface of the central support structure is set as the combustion surface, and the end surface is designed as the combustion surface or non-combustion surface according to the internal ballistic requirements;

[0036] The central support structure uses non-metallic tubes, rods or special-shaped structural parts that meet load requirements as the skeleton support of the central charge. After the embedded safety ignition device is ignited, reliable ignition is achieved through the annular gas channel formed by the wall-attached charge and the central charge.

[0037] An ignition enhancement cartridge is designed at the tail end of the center-loaded charge according to the free volume requirement to adjust the ignition response characteristics. The rear bracket is socketed with the center support structure to form a rigid support structure that runs through the center-loaded charge, which is used to improve the mechanical environment adaptability of the combined structure.

[0038] The following is further described in conjunction with the accompanying drawings and preferred embodiments:

[0039] In the current embodiment, a solid rocket motor combines a centrally loaded grain with a radial ignition device. The head ignition electrical device and the centrally loaded grain form a combined structure, with a propellant charge formed on the combined structure. This, combined with the wall-cast charge, forms a combined charge configuration. This fully utilizes the central space, improving the loading factor and mass ratio of the ignition structure. The head's safety ignition system is designed for radial ignition, with the combustion surface ignited by the gas flow through an annular channel between the central grain and the wall-cast grain. The central grain and the wall-cast annular channel erode combustion to produce an adjustable combustion surface increment, thereby achieving performance optimization and improving the engine's energy density.

[0040] The safety ignition device is a fully embedded design, which is integrated with the central support structure running through the center, and is connected and fixed to the front and rear structural parts such as the front head and the leading edge of the rear nozzle. The central support structure can adopt non-metallic tubes, rods or special-shaped structural parts that meet the load requirements. At the same time, it serves as the skeleton support of the central charge. The outer circular surface is the burning surface, and the end surface is designed as the burning surface or the non-burning surface according to the internal ballistic requirements; the safety ignition device adopts a radial ignition hole design to realize the radial ejection of high-temperature combustion gas, and the annular channel running through the central charge and the wall-cast charge can realize reliable ignition. If necessary, a reinforced ignition box can be used at the end of the charge.

[0041] like Figure 1 As shown in the figure, the engine layout principle diagram of the combined structure of the solid motor center loading column and the radial ignition device is as follows: Figure 2 As shown, it is a specific schematic diagram of the combined structure;

[0042] Among them, 1 is the radial screw (or radial pin, retaining ring, etc.) connection between the radial ignition device and the central charge; 2 is the elastic heat protection ring covering the reconnection surface; 3 is the threaded connection between the reinforcement box and the central bracket and the curing of the glue layer; 4 is the non-metallic central bracket for supporting the charge; 5 is the charge; 6 is the interface bonding layer between the charge and the support frame; 7 is the combustion-limiting insulation layer bonded after the charge is formed (or can be cancelled due to the need of the burning surface); 8 is the radial ignition hole of the safety ignition device, and the direction of the hole axis can be adjusted according to the ignition direction.

[0043] The center charge column is loaded from the head of the combustion chamber and connected and fixed with the head. Then the rear bracket is loaded from the tail of the combustion chamber. After being combined with the center charge column, the nozzle is assembled into place and fixed to the leading edge surface of the nozzle through the lining layer.

[0044] like Figure 3 As shown, it is described in detail that the ignition device and the central loading column are connected as a whole through mechanical connection methods such as screws, and then a thermal protection ring (elastic rubber ring or open hard non-metallic ring) and a heat-resistant adhesive are used for gluing and filling the gap for protection; the enhanced medicine box required according to the free volume is mechanically connected and glued to the tail of the central charge column.

[0045] like Figure 4 As shown, the center-loaded charge utilizes a preformed non-metallic center bracket, a prefabricated connection interface at the front base, and a surface treatment and adhesive coating are applied to the interface between the bracket and the charge. The charge is then poured and cured in a charge forming mold to form a center charge. The rear end face is retained or sealed with an insulating layer as required by the combustion surface.

[0046] like Figure 5 As shown, the fully embedded safety ignition device is designed to be axially connected to the combustion chamber head through a key retaining ring (or flange bolts, etc.). The rear section provides a docking connection interface with the center bracket. The middle section adopts radial ignition holes to realize radial ignition, and the outer cylindrical surface is protected by a high-temperature resistant thermal protection structure to realize ignition and support functions.

[0047] like Figure 6 As shown, the rear bracket design is made of non-metallic or metallic materials that are resistant to short-time ablation, and has a conical frame configuration to ensure the gas flow path; it is supported by a sleeve connection with the center bracket, and is fixed to the leading edge or rear joint of the nozzle through a surface matching design. A flexible cushion layer can be used between them to ensure assembly alignment according to the needs of the support structure.

[0048] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

[0049] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A structure combining a solid rocket motor center-loading charge and a radial ignition device, characterized by: It includes a center-loading charge, a rear support, an ignition enhancement cartridge, and an embedded safety ignition device, including: The embedded safety ignition device adopts a radial ignition design and is fixedly connected to the front end of the center-loaded powder column. The rear end of the center-loaded powder column is connected to the ignition enhancement box to improve the ignition characteristics. The powder column structure composed of the center-loaded powder column, the ignition enhancement box, and the embedded safety ignition device is annularly supported by the rear bracket to provide rigidity and a flow field channel during ignition.

2. The solid rocket motor center-loading charge and radial ignition device combined structure according to claim 1, characterized in that: The embedded safety ignition device is fixedly connected to the front end of the center-loaded powder column by radial screws or radial pins. A thermal protection retaining ring is provided at the connection to cover the connection surface for thermal protection. A curing glue layer is provided at the connection between the center-loaded powder column and the ignition enhancement box to enhance the connection strength between the ignition enhancement box and the center-loaded powder column.

3. The solid rocket motor center-loading charge and radial ignition device combination structure according to claim 2, characterized in that: The interior of the central loading charge is provided with a central support structure, a charge, an adhesive layer, and a combustion-limiting insulation layer. The charge is formed on the central support structure, and an adhesive layer is provided at the contact interface between the charge and the central support structure for isolation. After the central support structure, charge, and adhesive layer are set, the outer circle of the charge and the tail end combustion surface can be designed as a combustion surface or a non-combustion surface according to the design requirements of the interior ballistic performance.

4. The solid rocket motor center-loading charge and radial ignition device combination structure according to claim 3, characterized in that: After the embedded safety ignition device is ignited, the central charge column ignites and emits radial gas, which penetrates the annular channel formed by the charge column, the central support structure and the rear support to achieve reliable ignition, and the ignition enhancement cartridge enhances the ignition effect; This also includes wall-mounted powder columns, which ignite and spray out gas together with the center-loaded powder columns.

5. The combined structure of a solid rocket motor center-loading charge and a radial ignition device according to claim 4, characterized in that: The central support structure is provided with a front joint and a rear joint, and the wall-attached charge is additionally cast and formed at the upper front joint and rear joint of the central support structure. The wall-attached charge is formed into a cylinder, a truncated cone or an irregular structure according to the internal ballistic performance, and the outer circular surface or the axial end surface forming part of the charge is the burning surface.

6. The solid rocket motor center-loading charge and radial ignition device combined structure according to claim 5, characterized in that: The burning rates of the wall-attached grain and the center-loaded grain are matched with each other, and the wall-attached grain and the center-loaded grain together constitute a combined charge structure. The wall-attached grain and the center-loaded grain reserve space to form an annular gas channel to avoid flow congestion, and after ignition, erosive combustion is used to further adjust the burning surface increment to achieve optimization of the ignition thrust characteristics.

7. The combined structure of a solid rocket motor center-loading charge and a radial ignition device according to claim 6, characterized in that: The embedded safety ignition device is integrally connected to the central support structure, and radial ignition is achieved through the radial ignition holes provided on the embedded safety ignition device. The combined structure consisting of the central loading powder column, the rear bracket, the ignition enhancement box, and the embedded safety ignition device is installed on the engine combustion chamber head, and the rear bracket is socketed with the central support structure and docked with the leading edge of the nozzle through a flexible lining layer.

8. The combined structure of a solid rocket motor center-loading charge and a radial ignition device according to claim 7, characterized in that: The outer circular surface and end surface of the central support structure can be designed as a burning surface or a non-burning surface according to the internal ballistic requirements. The non-burning surface is realized by brushing a lining layer or covering it with an insulation layer.

9. The combined structure of a solid rocket motor center-loading charge and a radial ignition device according to claim 8, characterized in that: The central support structure adopts metal or non-metallic tubes, rods or special-shaped structural parts that meet the load requirements as the skeleton support of the central loading charge. After the embedded safety ignition device is ignited, reliable ignition is achieved through the annular gas channel formed by the wall-attached charge and the central loading charge.

10. The combined structure of a solid rocket motor center-loading charge and a radial ignition device according to claim 9, characterized in that: An ignition enhancement box is added to the tail end of the central loading column according to the free volume requirement to improve the ignition response characteristics. The rear bracket is connected to the central support structure to form a rigid support structure that passes through the central loading column, which is used to improve the mechanical environment adaptability of the combined structure.

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