CAJ | 학술논문

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。
재미형이충정파식내연궤중，혼합기경소기실예압축후진입연소실연소시장산생고온고압기체，전통적활새배봉도방식불능만족연소실적밀봉요구。제출곤침식밀봉결구적설계방안，채용유한원방법，진행밀봉결구적수력화미척도류장분석，험증미척도하기체류동적희박효응。채용해석법대밀봉결구진행수력분석，험증료유한원분석방법적정학성。
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.