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Flexible knitting soft interlayer used for pulse engine and manufacturing method

An engine and interlayer technology, applied in the direction of machines/engines, rocket engine devices, mechanical equipment, etc., can solve problems such as stiffness and bearing capacity requirements, and achieve the effect of meeting the pressure resistance and solving the stiffness and bearing capacity requirements of different positions.

Active Publication Date: 2020-07-14
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic material of the present invention is heterocyclic aramid fiber and heat-insulating and corrosion-resistant rubber matrix. The column section of the interlayer of the prefabricated body and the cone section of the interlayer of the prefabricated body are respectively three-dimensionally woven and two-dimensionally knitted, and are molded with the rubber matrix to realize The preparation of the flexible braided soft interlayer of the pulse engine to meet the pressure resistance, heat insulation and load-bearing requirements of the soft interlayer of the pulse engine, and to solve the problem of stiffness and load-bearing capacity requirements at different positions of the soft interlayer

Method used

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  • Flexible knitting soft interlayer used for pulse engine and manufacturing method
  • Flexible knitting soft interlayer used for pulse engine and manufacturing method
  • Flexible knitting soft interlayer used for pulse engine and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The length of the horizontal section of the prefabricated interlayer of the pulse engine soft interlayer in this embodiment is 30mm, the length of the prefabricated interlayer cone section is 150mm, and the length of the prefabricated interlayer column section is 460mm; the maximum diameter of the prefabricated interlayer cone section is 324mm, and the prefabricated The minimum diameter of the cone section of the body compartment is 103mm, and the diameter of the column section of the prefabricated body compartment is 103mm; the lateral projection length of the cone section of the prefabricated body compartment is 93.1mm, and the connection angle is 47.7°; the fiber is selected from aramid 1414, and the rubber matrix is ​​selected from EPDM rubber. The matrix content is 60%.

[0044] Concrete preparation steps are:

[0045] (1) if figure 1 Shown is a schematic diagram of the structure of the soft compartment. from figure 1 It can be seen that the soft interlayer of t...

Embodiment 2

[0053] The length of the horizontal section of the prefabricated interlayer of the pulse engine soft interlayer in this embodiment is 50mm, the length of the prefabricated interlayer cone section is 300mm, and the length of the prefabricated interlayer column section is 800mm; the maximum diameter of the prefabricated interlayer cone section is 600mm, and the prefabricated The minimum diameter of the cone section of the body compartment is 220mm, and the diameter of the column section of the prefabricated body compartment is 220mm; the lateral projection length of the cone section of the prefabricated body compartment is 180mm, and the connection angle is 47.7°; the fiber selection is aramid fiber 1414, and the rubber matrix is ​​EPDM rubber. The content is 60%.

[0054] (1) A composite material soft interlayer for solid rocket multi-pulse motors, the soft interlayer of the pulse engine mainly includes three parts: the interlayer horizontal section, the interlayer cone section,...

Embodiment 3

[0062] The length of the horizontal section of the prefabricated interlayer of the pulse engine soft interlayer in this embodiment is 50mm, the length of the prefabricated interlayer cone section is 300mm, and the length of the prefabricated interlayer column section is 800mm; the maximum diameter of the prefabricated interlayer cone section is 600mm, and the prefabricated The minimum diameter of the cone section of the body compartment is 220mm, and the diameter of the column section of the prefabricated body compartment is 220mm; the lateral projection length of the cone section of the prefabricated body compartment is 180mm, and the connection angle is 47.7°; the fiber is selected from aramid 1313 fiber, and the rubber matrix is ​​selected from polyurethane rubber. The content of the matrix is 60%.

[0063] The preparation method is the same as in Example 2. The pressure of the obtained flexible braided soft interlayer for pulse engines is 38MPa, the pressure time is 44s, an...

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Abstract

The invention discloses a flexible knitting soft interlayer used for a pulse engine and a manufacturing method and belongs to the field of function materials. The flexible knitting soft interlayer used for the pulse engine comprises an interlayer columnar section, an interlayer conical section and an interlayer horizontal section; the interlayer columnar section and the interlayer conical sectionare connected through a connecting component, wherein the interlayer columnar section, the interlayer conical section and the interlayer horizontal section are obtained by applying a compression molding process to a preform interlayer columnar section, a preform interlayer conical section and a preform interlayer horizontal section correspondingly; and the preform interlayer columnar section adopts integral variable-thickness 2.5 D structure knitting, and the preform interlayer horizontal section and the preform interlayer conical section adopts warp knitting or weft knitting integrated knitting. The flexible knitting soft interlayer used for the pulse engine bears pressure above 20 MPa, the pressure bearing time is over 30 s, and the heat-resistance temperature is above 560 DEG C.

Description

technical field [0001] The invention relates to a flexible braided soft interlayer for a pulse engine and a manufacturing method, belonging to the field of functional materials. Background technique [0002] The multi-pulse motor is a new type of solid rocket motor that can be started and stopped multiple times. It has high controllability, can effectively reduce the flight speed of the missile and the peak value of aerodynamic resistance, and improve the speed, range, hit rate and penetration of the missile in the final stage. ability. Among them, the pulse isolation device is the core component of the multi-pulse solid motor, which isolates the propellant in the combustion chamber into multiple propellant units, and each propellant unit can be ignited and burned separately. The main function of the isolation device is to prevent the gas of a certain propellant unit from intruding into other propellant units after being ignited, so as to ensure the independence of each pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34F02K9/34
CPCB29C70/34F02K9/34
Inventor 张典堂袁琼钱坤
Owner JIANGNAN UNIV
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