微型摆式内燃机密封结构的设计及分析  

Design and Analysis on Micro Free Swing Piston Engine Seal Structure

作　　者：郭志平[1] 王燕飞[1] 李冠孚[1] 卢彦铮[1] 郭炜[1] 陈远飞[1] 

机构地区：[1]内蒙古工业大学机械学院内蒙古呼和浩特010051

出　　处：《润滑与密封》2013年第8期83-86,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(51065019)

摘　　要：在微型二冲程摆式内燃机中,混合气经扫气室预压缩后进入燃烧室燃烧时将产生高温高压气体,传统的活塞环封堵方式不能满足燃烧室的密封要求。提出滚针式密封结构的设计方案,采用有限元方法,进行密封结构的受力和微尺度流场分析,验证微尺度下气体流动的稀薄效应。采用解析法对密封结构进行受力分析,验证了有限元分析方法的正确性。In two-stroke micro free swing piston engine, the burning of the gas mixture coming from the scavenging chamber after pre-compression will produce high temperature and high pressure gas in the combustion chamber, and the traditional piston ring sealing method can not meet the requirements to seal the combustion chamber. The roller-needle type seal structure was designed for the combustion chamber of two-stroke micro free swing piston engine. The stress and the mi- cro-scale flow field were analyzed, verifying the rarefied effect of micro scale gases flow. The stress of the seal structure was analyzed by the analytical method, which verifies the correctness of the finite element analysis results.

关 键 词：微型摆式内燃机 密封结构 微尺度 

分 类 号：TH136[机械工程—机械制造及自动化]