金属波纹管静密封技术研究

【作者】 袁磊；

【导师】 李东波； 刘晓刚；

【作者基本信息】 南京理工大学 ， 机械工程， 2008， 硕士

【摘要】 现代歼击机具有超音速巡航能力、高机动性能力、隐身能力等,为满足这些要求就促使了高性能液压作动系统的发展,现代歼击机液压系统具有向大功率、高压技术发展以及日趋恶劣的工作环境等趋势,液压系统的工作温度范围越来越宽,工作压力越来越高。大功率与小体积之间的矛盾比较突出,必须寻求新的技术来协调。液压密封就存在这样的问题,一方面,由于航空产品空间结构紧凑限制了产品的设计,传统橡胶密封在结构上很难保证产品密封要求;另一方面,处于高、低温等恶劣的工作环境下会加快橡胶制品的老化,从而影响产品的性能、寿命和可靠性,而密封失效造成液压油的泄漏又会对环境造成污染。因此,传统密封技术已逐渐不能适应现代歼击机的发展需求。本文从传统密封的特点以及局限性进行分析,针对某新型歼击机液压系统密封的要求,从金属密封技术研究、计算机辅助工程分析,介绍了金属密封加工中的技术难点,并进行了试验验证,使其能满足现代飞机静密封的技术要求。通过本文的研究,得出了一些对实际工程设计具有参考价值的设计方法和结论,可以对液压系统的密封设计提供有意义的参考。更多还原

【Abstract】 Modern fighter is characteristic of supersonic cruise, high maneuver and stealth, which results in high performance hydraulic actuation system. Therefore, hydraulic system shows the trends of high-power, high-pressure and severe operating environment such as higher operating temperature and higher operating pressure. New technique must be developed to overcome the conflict between high-power and small volume.High pressure results in a hydro-seal problem. Due to design restriction to compact product structure, traditional rubber seal can’t meet the requirements of product structural seal. On the other hand, severe operating environment such as high temperature, low temperature and etc. may accelerate rubber aging, which may affect performance, life and reliability of the product, as well as, seal failure may result in oil leakage and environmental pollution. Therefore, traditional sealing techniques have gradually inadaptable for modern fighter.This paper describes features and limitations of traditional seal. Taken the hydraulic system of a certain new fighter as an example, machining problems of metallic seal are detailed based on metallic seal technical study and CAE analyses. Experimental verification has been performed to satisfy the static seal requirements of modern fighter.This paper lists several significant design methods and conclusions as the reference to the seal design of hydraulic system.更多还原