摘要
为大幅度提高活塞式发动机的功率密度,提出一种双转子活塞发动机,其功率传输系统主要由能量转换组件和差速驱动组件构成。能量转换组件包含气缸体以及同轴交叉安装在气缸体中的两个转子,转子上均布有多个叶片活塞,两组叶片活塞在气缸体内相互间隔,与气缸体共同形成多个密闭的独立工作腔。差速驱动组件利用内摆线机构和曲柄摇杆机构组合而成,并负责约束气缸中的两个转子以周期性波动的角速度作差速转动,使得工作腔容积周期性地增大、减小。研究该发动机的构成及工作原理,得出发动机能量转换组件部分的基本几何关系及进、压、爆、排条件,推导出发动机排量和瞬时流量的计算公式,建立差速驱动组件部分的运动学模型并进行分析。分析结果表明,由于具备在主轴旋转一周过程中的较多的做功次数和动态扩容等特点,双转子活塞发动机理论上将比现有活塞式发动机的排量更大、功率密度更高、运转更为平稳。
In order to increase the power density of the piston engine,the power transmission system of a twin-rotor piston engine is proposed,which is composed of an energy conversion assembly and a differential velocity drive mechanism assembly.The major parts of the energy conversion assembly include a housing and two interdigitated rotors each having plurality of diagonally opposed vane pistons which separate the housing and form working chambers.The differential velocity drive mechanism is composed of the hypocycloidal mechanism and the crank rock mechanism,which constrain the two rotors fixed inside the housing rotating with periodical nonuniform velocity.Thus the volume of the working chambers varies,and opens and closes periodically.The structure and the working principle of the engine are discussed.The mathematical modeling of the energy conversion assembly and the conditions of intake,compression,combustion,and exhaust are presented.The displacement and the instantaneous flow of the engine are deduced.The kinematic model of the engine mechanism is presented and analyzed.The results show that the twin-rotor piston engine theoretically should be able to generate higher volumetric output and power density due to multiple utilization of work space during one revolution,and higher uniformity of torque due to multiple work strokes during one revolution than the piston engines available.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第1期64-71,共8页
Journal of Mechanical Engineering
基金
总装备部武器装备探索资助项目(7131109)
关键词
双转子
活塞发动机
差速
摆线
Twin-rotor Piston engine Differential velocity Cycloid
