伺服系统超高速机械密封热力变形分析与研究  

Analysis and study on thermal deformation of ultra high speed mechanical of servo system

作　　者：郭军刚[1] 宋振坤[1] 高春峰 郝小龙[1] 张明根 GUO Jungang;SONG Zhenkun;GAO Chunfeng;HAO Xiaolong;ZHANG Minggen(Beijing Research Institute of Precise Mechanical and Electronic Control Equipment, Beijing 100076, China)

机构地区：[1]北京精密机电控制设备研究所,北京100076

出　　处：《重庆理工大学学报（自然科学）》2022年第4期306-312,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目:航天先进制造技术研究联合基金重点项目(U1737202)。

摘　　要：超高速机械密封作为运载火箭伺服系统中的核心基础元件,其密封石墨镶嵌环镶装后引起的密封端面变形及残余应力释放,导致密封环蠕变变形,可能使机械密封在长期带压贮存条件下发生渗漏。针对现役机械密封石墨镶嵌密封环结构,采用数值分析与试验研究相互补充、相互验证的方式,研究机械密封副端面变形规律和静环座残余应力分布,获得了镶嵌环最大接触应力与端面变形最大值的位置,分析了影响镶嵌环端面变形的关键因素,揭示其密封副界面慢渗特性。通过机械密封在温度应力下的变形分析以及密封静环座残余应力分布测试验证,为超高速机械密封试件可靠性试验筛选提供一个合理的、高效费比的技术途径。Ultra high speed mechanical seal structure is the core basic component of launch vehicle servo system.After the seal graphite inlay ring and creep deformation of seal ring caused by the release of residual stress,the deformation of seal face is one of the possible reasons for the leakage of mechanical seal under the condition of long-term storage with pressure.In this paper,based on the structure of graphite inlaid seal ring used in the mechanical seal on active service,the numerical analysis method and experimental study method are complemented and verified.To study the deformation law of the end face of the mechanical seal pair and the residual stress distribution of the static ring seat.the positions of the maximum contact stress and the maximum deformation of the end face of the inlaid ring are obtained.the key factors affecting the end face deformation of the inlaid ring are analyzed.and the slow permeability characteristics of the sealing pair interface are revealed.Through the deformation analysis of mechanical seal under temperature stress and the test verification of the residual stress distribution of the static ring seat,a reasonable,efficient and cost-effective technical way is provided for the reliability test screening of ultra-high speed mechanical seal specimens.

关 键 词：机械密封 热力变形 残余应力 影响分析 

分 类 号：V433[航空宇航科学与技术—航空宇航推进理论与工程]