阅读说明：本技术 发动机级间防护材料烧蚀模拟固定装置 (Ablation simulation fixing device for engine interstage protective material ) 是由 黄波 李映坤 陈雄 于 2019-08-18 设计创作，主要内容包括：本发明公开了一种发动机级间防护材料烧蚀模拟固定装置,包括堵盖(1)、试件固定端盖(2)、试件(3)、发动机壳体(4)和内衬(5)；发动机壳体(4)两端头部均设有外螺纹,堵盖(1)内部设有内螺纹与发动机壳体(4)一端连接,试件固定端盖(2)内部开有环形槽,槽内安装有试件(3)；堵盖(1)内部中心处有一凸台,凸台外侧有外螺纹,试件固定端盖(2)内侧设有内螺纹,与凸台外侧的外螺纹连接。本发明解决了双脉冲发动机Ⅱ脉冲径向软质隔层工作烧蚀过程难以模拟和观测的问题,利用该装置可实现径向软质隔层工作烧蚀过程的安装和固定。(The invention discloses an ablation simulation fixing device for an engine interstage protective material, which comprises a blocking cover (1), a test piece fixing end cover (2), a test piece (3), an engine shell (4) and a lining (5); the head parts of two ends of the engine shell (4) are respectively provided with an external thread, an internal thread is arranged in the plug cover (1) and is connected with one end of the engine shell (4), an annular groove is formed in the test piece fixing end cover (2), and a test piece (3) is arranged in the groove; a boss is arranged at the center of the inner part of the plug cover (1), an external thread is arranged on the outer side of the boss, and an internal thread is arranged on the inner side of the test piece fixing end cover (2) and connected with the external thread on the outer side of the boss. The invention solves the problem that the working ablation process of the radial soft interlayer of the II pulse of the double-pulse engine is difficult to simulate and observe, and the device can be used for realizing the installation and fixation of the working ablation process of the radial soft interlayer.)

1. The utility model provides an engine interstage protective material ablation simulation fixing device which characterized in that: the device comprises a blocking cover (1), a test piece fixing end cover (2), a test piece (3), an engine shell (4) and a lining (5); the head parts of two ends of the engine shell (4) are respectively provided with an external thread, an internal thread is arranged in the plug cover (1) and is connected with one end of the engine shell (4), an annular groove is formed in the test piece fixing end cover (2), and a test piece (3) is arranged in the groove; a boss is arranged at the center of the inner part of the plug cover (1), an external thread is arranged on the outer side of the boss, and an internal thread is arranged on the inner side of the test piece fixing end cover (2) and connected with the external thread on the outer side of the boss.

2. The double-pulse engine compartment type interstage protective material ablation simulation engine of claim 1, wherein: the plug cover (1), the test piece fixing end cover (2) and the engine shell (4) are made of 45 steel materials; the inner liner (5) is made of ethylene propylene diene monomer rubber.

3. The double-pulse engine compartment type interstage protective material ablation simulation engine of claim 1, wherein: the blanking cover (1), the test piece fixing end cover (2), the test piece (3), the engine shell (4) and the lining (5) are all of a single-shaft rotating body structure.

4. The double-pulse engine compartment type interstage protective material ablation simulation engine of claim 1, wherein: the section of the blocking cover (1) is E-shaped.

5. The double-pulse engine compartment type interstage protective material ablation simulation engine of claim 1, wherein: the lining (5) is sleeved in the engine shell (4) and connected in an adhesion mode.

Technical Field

The invention belongs to the field of test research of a thermal protection system of a double-pulse engine, and particularly relates to an ablation simulation fixing device for an interstage protection material of an engine.

Background

The solid rocket engine has the excellent characteristics of simple structure, convenient use, reliable work and the like, and can be widely applied to various weapon systems. However, with the gradual development of the aerospace field, the inherent defects that the thrust of the traditional solid rocket engine cannot be interrupted and regulated become more prominent, especially when the thrust is compared with the excellent controllability of the liquid rocket engine. Therefore, the research on the controllability technology of the solid rocket engine is particularly important.

Through the two-way promotion between the modern war and the missile weapon system, the latest research result of the solid rocket engine technology, namely the double-pulse solid rocket engine, comes. The double pulse engine has the capability of multiple starts, highlights out-of-range missions, emphasizes ballistic variability, and undoubtedly, provides a good solution to the inherent drawbacks of solid rocket engines. The double-pulse engine divides the solid rocket engine into two relatively independent combustion chambers by the interstage isolation device with the flame-retardant and heat-insulating functions, the combustion chambers are provided with independent ignition systems, and the control system can respectively control the two combustion chambers to be ignited and started successively, so that the effect of controllable thrust and repeated starting is achieved.

The combustion chamber needs to bear the action of heat load of more than 3000K and internal pressure load of more than 10MPa for a long time in the working process of the double-pulse engine, and the temperature and pressure load in the combustion chamber must be further improved along with the use of high-energy propellant and the design of a high specific impulse engine. In order to ensure the reliable work of the double-pulse engine, the design of a soft interlayer of the pulse isolation device is crucial, and the thickness of the heat-proof structure is insufficient, so that the temperature of the shell is excessively increased, and the structural integrity is endangered; on the contrary, the design redundancy of the heat-proof structure can cause the negative mass of the engine to be increased, and the working performance of the engine is seriously influenced. Therefore, a double-pulse engine interlayer type interstage protection material ablation simulation engine needs to be designed, and reference is provided for the design of a thermal protection structure of the double-pulse engine.

Disclosure of Invention

The invention aims to provide an engine interstage protective material ablation simulation fixing device, which solves the problem that the working ablation process of a II-pulse radial soft interlayer of a double-pulse engine is difficult to simulate and observe, and can realize the installation and the fixation of the working ablation process of the radial soft interlayer by utilizing the device.

The technical solution for realizing the purpose of the invention is as follows: an engine interstage protective material ablation simulation fixing device comprises a plugging cover, a test piece fixing end cover, a test piece, an engine shell and a lining; the head parts of two ends of the engine shell are respectively provided with an external thread, an internal thread is arranged in the plug cover and connected with one end of the engine shell, an annular groove is formed in the test piece fixing end cover, and a test piece is arranged in the groove; a boss is arranged at the center inside the plug cover, an external thread is arranged on the outer side of the boss, and an internal thread is arranged on the inner side of the test piece fixing end cover and connected with the external thread on the outer side of the boss.

The plug cover, the test piece fixing end cover and the engine shell are made of 45 steel materials; the inner liner is made of ethylene propylene diene monomer rubber.

The blanking cover, the test piece fixing end cover, the test piece, the engine shell and the lining are all of a single-shaft rotating body structure.

The section of the blocking cover is in an E shape.

The inner lining is sleeved in the engine shell and connected in a bonding mode.

Compared with the prior art, the invention has the remarkable advantages that:

(1) the device can simulate the work engineering of the II pulse radial soft interlayer of the double-pulse engine more truly, and the nearly stagnant flow field in front of the radial soft interlayer is reproduced without acceleration.

(2) The device has strong universality and is suitable for the test simulation of thermal protection materials with various diameters and thicknesses.

(3) The device has simple structure, easy assembly, reliable fixation and large ablation area of the radial soft interlayer.

Drawings

FIG. 1 is a schematic diagram of an engine interstage protective material ablation simulation fixing device.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

With reference to fig. 1, the ablation simulation fixing device for the interstage protection material of the engine is used for researching the mass and heat transfer ablation process of the heat insulation material, and has important reference value for the design of the heat protection structure of the engine.

The device comprises a plugging cover 1, a test piece fixing end cover 2, a test piece 3, an engine shell 4 and a lining 5.

The plug cover 1, the test piece fixing end cover 2 and the engine shell 4 are made of 45 steel materials so as to ensure the strength and meet the requirement of long-time working of the double-pulse engine; the lining 5 is made of ethylene propylene diene monomer rubber, and aims to resist flame and insulate heat and avoid overhigh temperature of the shell.

Referring to fig. 1, the blanking cover 1, the test piece fixing end cover 2, the test piece 3, the engine case 4 and the lining 5 are all single-shaft rotating body structures.

The blanking cover 1 is provided with an internal thread and is connected with the ablation cavity shell 4, a boss is arranged in the middle of the blanking cover and used for supporting the test piece 3, an external thread is arranged on the outer side of the boss and connected with the test piece fixing end cover 2, and the test piece 3 is completely limited and fixed.

The test piece fixing end cover 2 is provided with an internal thread connected with the plugging cover 1, and the inner side of the test piece fixing end cover is provided with a step for limiting and fixing the test piece.

And the left and right sides of the shell 4 are respectively provided with an external thread which is connected with the ablation cavity blocking cover 1 and the pulse engine I arranged outside.

The liner 5 is bonded to the engine case 4.