微型摆式内燃机动力特性研究  

Transient Dynamics Analysis of Micro Free Piston Swing Engine

作　　者：郭志平[1] 王燕飞 张慧杰[3] 卢彦铮[1] 李冠孚[1] 郭炜[1] 

机构地区：[1]内蒙古工业大学机械学院,呼和浩特010051 [2]内蒙古北重集团新产品研究院,包头014030 [3]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《内燃机工程》2014年第2期119-124,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51065019)

摘　　要：分析了微型摆式内燃机的工作原理,设计了基于间隙密封的滚针式微型摆式内燃机密封结构,建立了中心摆动力学模型,并进行了动力学仿真分析,得出角位移、角速度及角加速度的变化曲线。对中心摆进行了瞬态动力分析,得出最大应力及最大变形所在位置。研究结果表明:中心摆在上止点附近时,燃烧室的压力和应力较大,中心摆应力主要集中在中心孔附近及摆的受力面根部,最大应力位于中心孔键槽处。Analyzed the working principle of micro free piston swing engine, a needle roller type seal structure based on clearance seal was designed. A dynamics model of center pendulum was established and used to conduct dynamic simulation analysis for achieving angular displacement, angular velocity and angular acceleration curves. By transient dynamics analysis of the center pendulum, positions of the max. stress and max. deformation were found. Results show that the combustion chamber high pressure and stress exist near the center pendulum top dead center position and the center pendulum stress mainly concentrates in area near the center hole and pendulum bearing surface root , and the max. stress is in the center hole keyway zone.

关 键 词：内燃机 微型摆式内燃机 间隙密封 动力学模型 瞬态动力 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]