液压自由活塞发动机动态特性的仿真研究  

Simulation Study of Dynamic Characteristics for a Hydraulic Free Piston Engine

作　　者：夏必忠[1] 张辉[1] 段广洪[1] 傅新[2] 杨华勇[2] 

机构地区：[1]清华大学精密仪器与机械学系制造工程研究所,北京100084 [2]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《机械科学与技术》2005年第11期1331-1333,1386,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50375078);国家"863"高技术发展计划项目(2001AA423150)资助

摘　　要：液压自由活塞发动机(hydrau lic free p iston engine,以下简称HFPE)是将内燃机和液压泵集成为一体,以液体为工作介质实现动力非刚性传输的一种特种发动机。在左、右动力腔的交替驱动下,HFPE的活塞组件在腔体中作往复直线运动,同时泵出液压油驱动负载工作。与曲轴式发动机不同,由于不受曲柄连杆机构的约束,HFPE活塞组件的运动规律完全取决于其本身的质量及所受到的作用力。本文通过建立所研制的HFPE样机各子系统的数学模型,重点研究了HFPE样机的动态特性,以期为系统的结构及控制系统提供理论依据。A dual piston hydraulic free piston engine （DHFPE） integrates internal combustion engines and hydraulic pumps into one compact unit, As a special engine, it uses liquid as its work medium, and non-stiff power transmission is realized through hydraulic pressure energy. In a HFPE, the free piston assembly is driven back and forth between two outer dead centers by fuel energy, and at the same time hydraulic oil is pumped out for energy. Owing to the absence of a flywheel, the motion of piston assembly is different from crankshaft engines and depends on the mass and the different forces acting on it. The dynamic characteristics of HFPE are studied to provide a theoretical basis for structural design and control systems.

关 键 词：自由活塞发动机 液压 动态特性 仿真研究 

分 类 号：TH137.5[机械工程—机械制造及自动化]