A solid rocket motor charge grain structure

A technology of solid rockets and motors, applied in rocket motor devices, machines/engines, mechanical equipment, etc., can solve problems such as uneven distribution of stress and strain, increase slot size, reduce filling fraction, etc., to achieve increased volumetric energy density, The effect of reducing the slot width and increasing the filling ratio

Active Publication Date: 2015-09-23
BEIJING POWER MACHINERY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in engineering practice, the slotted bottom structure basically adopts a semicircular bottom ( figure 1 ), both of these two grooved bottom structures have the problem of uneven distribution of stress and strain, resulting in excessive local stress and strain. Fraction

Method used

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  • A solid rocket motor charge grain structure
  • A solid rocket motor charge grain structure
  • A solid rocket motor charge grain structure

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Embodiment Construction

[0018] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 2 As shown, the present invention provides a solid rocket motor charge grain structure, including the charge grain inner tube 1 and the slot 2 connected to each other, and the charge grain inner tube 1 and the slot 2 pass through the transition chute 3 connection, such as image 3 , Figure 4 As shown, the longitudinal section of the groove bottom of the slot 2 is an axisymmetric structure, and the left half of the axisymmetric structure includes sequentially connected: a first arc with a radius of R1 and a second arc with a radius of R2 , and a straight line with a length of L / 2, wherein, R1 is not equal to R2, and the first arc is tangent to the second arc, L is 0.1K-0.15K, R1 is 0.15K-0.2K, ...

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Abstract

The invention relates to a charging grain structure of a solid rocket engine, and belongs to the technical field of solid rocket engines. Under the condition that a design limiting boundary is constant, a groove bottom structure can be in an isostress-strain state, local stress concentration is prevented from appearing on the groove bottom structure, and the grooving width can be effectively reduced on the premise that integrity of the charging structure is ensured, so that the charge-weight ratio of a charging combustion chamber is improved, and the purpose of improving the overall performance namely the volume energy density of the solid rocket engine is achieved.

Description

technical field [0001] The invention relates to the technical field of solid rocket motors, in particular to a charge column structure of a solid rocket motor. Background technique [0002] Solid rocket motor is a power device widely used in weapons and equipment, and the structure design of grain is one of the key technologies of solid rocket motor. During decades of engineering applications of solid rocket motors, a large number of related design technologies have been accumulated. [0003] The tube-groove charge type is a commonly used charge structure for solid rocket motors with large slenderness ratio and relatively stable burning surface variation law. It achieves the expected burning surface by optimizing the structural parameters such as the number of grooves and the structure size of the tube-groove transition chute. Changes with the thickness of the meat. [0004] The above-mentioned drug type structure has been applied in a large number of solid rocket motors, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K9/10
Inventor 赖谋荣苏华吴华祯何海燕刘顶新
Owner BEIJING POWER MACHINERY INST
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