航空液压油箱密封结构的改进及可靠性建模分析

Improvement and Reliability Modeling Analysis of Aviation Hydraulic Oil Tank Sealing Structure

为提高航空液压油箱使用寿命,通过分析某液压油箱的密封结构,指出液压油箱中比较关键或容易出现问题的密封结构,并进行一系列改进。根据密封件的失效机制及失效原因,通过对失效条件进行组合、简化,建立密封结构可靠性分析模型,评估密封改进方案的可行性。航空液压油箱寿命试验和实际应用均验证了可靠性模型的正确性。密封件的可靠性建模分析方法,可用于液压油箱密封方案设计、设计方案评估、故障分析等。

In order to improve the service life of a aviation hydraulic oil tank, its sealing structures of the hydraulic tank were performed.According to the failure sealing structure was established sealing structure was analyzed. The which are key or prone to problems were pointed out, and a series of improvements mechanism and the failure reason of the seal, the reliability analysis model of the through combining and simplifying the failure conditions, and the feasibility of the seal improvement scheme was evaluated.The correctness of the reliability model was verified by the life tests and the practical application of aviation hydraulic tank. The reliability analysis method of the seal parts can be used for the design of the sealing scheme ,the design seheme and the fault analysis of the hydraulic oil tank.