【摘要】 为提高航空作动器的往复密封性能,对其新型密封结构进行特性分析.通过分析液压往复密封机理,指出接触压力分布对往复密封泄漏和摩擦的影响,并获得高性能密封的接触压力分布方法.对航空作动器新型密封VL密封结构进行仿真分析,获得4种流体压力下的接触压力分布,以此揭示流体压力建立过程中密封结构与接触压力分布的变化关系,并指出VL密封对高压流体的密封适应性,以及其结构对产生不同接触压力分布的特殊性规律.将VL密封与O形密封和斯特封进行性能对比,分别计算摩擦力与泄漏量,证明VL密封具有密封性能好、可靠性高的特点.更多还原

【Abstract】 A new cylinder seal was investigated to improve the performance of reciprocating seal installed in the aircraft hydraulic cylinder.Firstly,the analysis of the working principle of general hydraulic reciprocating seal pointed out the effect of contact pressure distribution on seal leakage and friction,and the most suitable contact pressure distribution method was obtained.Secondly,the VL seal was modeled and simulated,and the contact pressure distributions at different fluid pressures were obtained to reveal the relationship between the construction and contact pressure distribution during the process of building fluid pressure.The adaption of the seal structure against high fluid pressure and the principle of the special pressure distribution of the VL seal were pointed out.Finally,comparison among the VL seal,O-ring seal and step seal was carried out by analyzing their frictions and leakages,respectively.Results show that the VL seal has the best performance of leakage and liability.更多还原