CN112431690B

CN112431690B - Embedded thrust adjusting solid engine

Info

Publication number: CN112431690B
Application number: CN202011159329.4A
Authority: CN
Inventors: 季朦; 李晨轩; 王东魏; 罗杨
Original assignee: Beijing Machinery Equipment Research Institute
Current assignee: Beijing Machinery Equipment Research Institute
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2022-04-01
Anticipated expiration: 2040-10-26
Also published as: CN112431690A

Abstract

The invention discloses a nested thrust-regulated solid engine, which comprises a main combustion chamber, a main spray pipe and a plurality of fuel gas generator modules, wherein the main spray pipe is communicated with the main combustion chamber; each fuel gas generator module comprises an igniter, an opening and closing valve, a single-module combustion chamber and a solid propellant arranged in the single-module combustion chamber; the igniter and the opening and closing valve are respectively arranged at two ends of each single-module combustion chamber, and a gas channel is formed inside the solid propellant. The invention adopts a mode of embedding a plurality of fuel gas generator modules, realizes the thrust adjusting effect of the solid engine, realizes the repeated starting of the solid engine by utilizing the ignition of a single fuel gas generator module at different time nodes, and breaks through the defect that the traditional solid engine is difficult to be repeatedly started. By utilizing a plurality of or a plurality of different standard types of cooperative ignition, the output of different thrust magnitudes can be realized, and the application flexibility of the solid engine is improved.

Description

Embedded thrust adjusting solid engine

Technical Field

The invention belongs to the technical field of solid rocket engines, and particularly relates to an embedded type thrust adjusting solid engine.

Background

Missile weaponry is developing towards high maneuverability and rapid defense penetration. In order to meet the requirements of high maneuverability, quick response and high interception capability of missile weapons, the rocket engine is required to have the continuous multiple starting and active and random controllable thrust. The solid rocket engine has the advantages of simple structure, good maneuverability, high propellant density, convenience, reliability and the like, and is commonly used for power devices such as guided missiles, kinetic energy interceptors and the like. However, once the solid rocket engine is ignited, the solid rocket engine cannot be actively flamed out and restarted, and only works according to a preset thrust scheme until the charge combustion is finished, so that repeated starting and random thrust adjustment for multiple times are difficult to realize.

The current solid engine repeated starting and thrust adjusting modes mainly comprise: a regulated nozzle throat solid engine, a staged charge solid engine, a solid pulse engine, etc. The solid engine with the adjustable nozzle throat surface can adjust thrust within a certain range, cannot be started for multiple times, is complex in structure, is still in a test research stage, and has no substantial progress in the application aspect of missile engines. The sectional charging engine and the solid pulse engine are generally prefabricated multistage thrust and multi-pulse thrust and do not have the capability of continuous multi-time starting and random thrust control.

Disclosure of Invention

The invention aims to provide an embedded thrust adjusting solid engine which has the capabilities of continuous multiple starting and active and random thrust controllability.

In order to achieve the above object, according to one aspect of the present invention, there is provided an in-line thrust-modulated solid engine including a main combustion chamber, a main nozzle communicating with the main combustion chamber, and a plurality of gas generator modules embedded in the main combustion chamber; wherein each gas generator module comprises an igniter, an on-off valve, a single-module combustion chamber and a solid propellant disposed inside the single-module combustion chamber; the igniter and the opening and closing valve are respectively arranged at two ends of each single-module combustion chamber, and a gas channel is formed inside the solid propellant.

According to the invention, the gasifier modules are cylindrical, a plurality of cylindrical gasifier modules being arranged in parallel and stacked together.

Preferably, the number of gasifier modules is 15 to 21.

Preferably, the number of modules of the gas generator is 19.

Preferably, the cylindrical gasifier module has a diameter of 10mm to 50 mm.

Preferably, the solid propellant of the gas generator module has a packing density of 90% or more.

The embedded type thrust adjusting solid engine provided by the invention realizes the thrust adjusting effect of the solid engine by embedding the plurality of gas generator modules, realizes repeated starting of the solid engine by igniting the single gas generator module at different time nodes, and overcomes the defect that the traditional solid engine is difficult to be repeatedly started. By utilizing a plurality of or a plurality of different standard types of cooperative ignition, the output of different thrust magnitudes can be realized, and the application flexibility of the solid engine is improved. The scheme of the invention has the advantages of simple and ingenious structure, easy control, mature and reliable technical approach, realization of repeated ignition and thrust adjustment, contribution to improving the maneuverability and flexibility of the solid engine and widening the application range of tasks.

Drawings

FIG. 1 is a side sectional view of a nested thrust modulating solid state engine of the present invention.

FIG. 2 is a front cross-sectional view of the nested thrust modulating solid state engine of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be emphasized that the specific embodiments described herein are merely illustrative of the invention, are some, not all, and therefore do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring collectively to fig. 1 and 2, a nested thrust regulated solid state engine generally comprises a main combustion chamber 1, a main nozzle 6, and a plurality of gas generator modules. The main nozzle 6 is communicated with the main combustion chamber 1, and a plurality of gas generator modules are embedded in the main combustion chamber 1. The main combustion chamber 1 and the main nozzles 6 form the main appearance of the solid engine, and each gas generator module comprises an igniter 2, an opening and closing valve 5, a single-module combustion chamber 3 and a solid propellant 4 arranged inside the single-module combustion chamber 3. The igniter 2 and the opening and closing valve 5 are respectively arranged at two ends of the single-module combustion chamber 3, the solid propellant 4 is filled in the single-module combustion chamber 3 in a high density manner, and a gas channel 7 is formed inside the solid propellant 4. Preferably, the packing density of the solid propellant 4 of the gas generator module is greater than or equal to 90%.

Preferably, each gasifier module is of a small, standard, long cylindrical shape, preferably with a cylindrical gasifier module diameter of 10mm to 50 mm. A plurality of cylindrical gasifier modules are stacked in parallel, with a single in-line gasifier module containing a single igniter 2, a single module combustion chamber 3, a solid propellant 4 and an on-off valve 5. The embedded gasifier modules can be classified into different standard types according to different loading amounts and combustion modes.

Preferably, the number of gasifier modules is 15 to 21. More preferably, the number of gasifier modules is 19. The gas generator module occupies the space of the whole main combustion chamber 1 as much as possible, and a plurality of or a plurality of embedded gas generator modules are integrally assembled in the main combustion chamber according to the requirement, and the integrated gas generator module occupies most space of the main combustion chamber so as to be beneficial to rapid ignition and combustion of the fuel charge. According to the embedded thrust adjusting engine, repeated ignition is realized by controlling ignition of a single fuel gas generator module, and thrust adjustment is realized by controlling a plurality of fuel gas generator modules.

The method of use of the nested thrust modulating solid state engine is described in detail below: when the solid engine works, the opening and closing valve 5 of a single fuel gas generator module is controlled to be opened and the igniter 2 is controlled to ignite to generate thrust; closing the valve 5 after the charge combustion is finished; controlling a plurality of gas generator modules to ignite simultaneously according to the requirement of the thrust, wherein the thrust precision of the engine which can be adjusted is determined by the gas generator module with the smallest diameter; according to the output requirement of the variable thrust curve, different gas generator modules are sequentially controlled to ignite at different time nodes, and the diversity and flexibility of thrust output are improved.

In the specific working process, the thrust adjustment of the engine comprises two forms: firstly, the single embedded gas generator module is started at different time nodes, so that the engine can be started repeatedly and work uninterruptedly for a long time; and secondly, a plurality of embedded gas generator modules or embedded gas generator modules of different standard types are started at different time nodes, so that the variable thrust regulation output of the solid engine is realized, the working maneuverability of the solid engine is effectively enhanced, the application flexibility is improved, and the expansion of the task application range is facilitated.

The foregoing is only a preferred application of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the technical principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A nested thrust modulated solid engine comprising a main combustion chamber (1), main nozzles (6) communicating with the main combustion chamber (1), and a plurality of gas generator modules embedded within the main combustion chamber (1); the integrated gas generator module occupies most of the space of the main combustion chamber, and the main combustion chamber (1) and the main nozzle (6) form the main body appearance of the solid engine; wherein each gas generator module comprises an igniter (2), an on-off valve (5), a single-module combustion chamber (3) and a solid propellant (4) arranged inside the single-module combustion chamber (3); the igniter (2) and the opening and closing valve (5) are respectively arranged at two ends of each single-module combustion chamber (3), and a gas channel (7) is formed inside the solid propellant (4); the fuel gas generator modules are cylindrical, a plurality of cylindrical fuel gas generator modules are arranged in parallel and stacked together, repeated ignition is realized by controlling ignition of a single fuel gas generator module, and thrust adjustment is realized by controlling a plurality of fuel gas generator modules.

2. The nested thrust modulating solid engine of claim 1, wherein the number of gas generator modules is 15 to 21.

3. The nested thrust modulation solid engine of claim 2, wherein the number of modules of the gas generator is 19.

4. The nested thrust modulating solid engine of claim 1, wherein the cylindrical gas generator modules have a diameter of 10mm to 50 mm.

5. The nested thrust modulation solid engine of claim 1, wherein the packing density of the solid propellant (4) of the gas generator module is ≥ 90%.