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Solid rocket motor seal life prediction method based on seal life cycle

A solid rocket, life cycle technology, applied in computer-aided design, instrumentation, geometric CAD, etc., can solve problems such as limited reference value and analysis of the rebound phenomenon of rubber seals, to facilitate calculation and analysis, improve reliability and accuracy , the effect of simplifying the processing

Inactive Publication Date: 2017-09-22
CHONGQING UNIV
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Problems solved by technology

[0005] In the existing prediction methods for the seal life of solid rocket motors, the influence of the aging phenomenon of the rubber seal ring on the seal life in the storage stage is mainly considered, and the springback phenomenon of the rubber seal ring in the working stage is not analyzed.
This results in a large difference between the obtained life prediction results and the actual life, and the reference value is relatively limited.

Method used

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  • Solid rocket motor seal life prediction method based on seal life cycle
  • Solid rocket motor seal life prediction method based on seal life cycle
  • Solid rocket motor seal life prediction method based on seal life cycle

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Embodiment Construction

[0067] The implementation process of the present invention includes: 1) determining the aging model of the silicone rubber at room temperature; 2) determining the compression deformation rate of the silicone rubber sealing ring after aging; 3) determining the compression deformation rate of the silicone rubber sealing ring after aging and rebound; 4) Determine the engineering stress of the silicone rubber sealing ring when the solid rocket motor is working; 5) Determine the life prediction model of the solid rocket motor based on the life cycle of the seal; 6) Determine the aging storage time under the maximum allowable leakage rate.

[0068] (1): Determine the aging model of silicone rubber at room temperature

[0069] The expression of aging reaction rate and aging temperature of silicone rubber is:

[0070] K=7863.6exp(-4706.3 / T)

[0071] Then at room temperature, the aging model of silicone rubber is:

[0072] f(P)=0.9603exp(-0.0027t 0.57 )

[0073] (2): Determine the compression de...

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Abstract

The present invention relates to a solid rocket motor seal life prediction method based on a seal life cycle. The method specifically comprises: 1) determining an aging model under a rubber normal temperature; 2) determining a compression deformation rate after a rubber seal ring is aged; 3) determining a compression deformation rate after the rubber seal ring is aged and rebound; 4) determining an engineering stress of the rubber seal ring when a solid rocker motor is operated; 5) determining a life prediction model of the solid rocket motor based on a seal life cycle; and 6) determining aging storage time under a maximum allowable leak rate. According to the method, on the basis of a rubber aging model, a relation between a seal ring compression permanent deformation rate and a compression deformation rate, a simplified seal ring rebound model, a rubber Mooney-Rivlin model and an asbestos rubber leakage rate model, the storage life of the solid rocket motor can be effectively predicted, maintenance of the stored solid rocket motor is facilitated, and secure and reliable operation of the solid rocket motor is ensured.

Description

Technical field [0001] The invention relates to the technical field of solid rocket motor sealing, in particular to a solid rocket motor sealing life prediction method based on the sealing life cycle. Background technique [0002] The solid rocket motor (SRM) is an important component of missiles and space rockets, and its research work is closely related to space safety. During the assembly process of solid rockets, there are requirements for sealing performance. Its sealing performance is of great significance to the safe operation of solid rockets. [0003] In order to prolong the service life of the solid rocket motor, prevent the leakage of high temperature and high pressure gas in the shell when the engine is working, and ensure the moisture and corrosion protection of the shell during storage and transportation, the connection parts of each structural system should be well sealed. Otherwise, when the engine is ignited, the leaked gas will not only destroy the internal ball...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20G06F2119/04
Inventor 李昕桐赵玺林景栋黄锦林黄立
Owner CHONGQING UNIV
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