液压机械无级变速器的反求设计
Reverse Design of A Hydro-mechanical Continuously Variable Transmission

对大马力拖拉机进行运动学和动力学分析,根据性能参数,设计一种等比式双行星排汇流液压机械无级变速器,包括换挡机构齿轮、双行星齿轮传动比的设计,发动机、离合器和液压调速机构的选择。通过对变速器无级调速特性曲线试验值和理论值的比较,进行了误差分析,证明设计方案的合理性。模拟拖拉机3种作业模式,对液压机械无级变速器和发动机进行匹配试验,验证了变速器的无级调速性和动态响应特性。
We analyzed the kinematics and dynamics of a large horsepower tractor according to its performance parameters and then designed a geometric type hydro-mechanical continuously variable transmission (HMCVT) with a double-planetary gear, including the transmission ratio of shifting mechanism, diesel engine, clutches and hydraulic speed regulator. We compared the experimental and theoretical curves of the stepless speed regulator, and analyzed the causes of error and the rationality of the design scheme. In three operation modes of the tractor, the experimental results for matching the HMCVT and the engine verify the continuously stepless speed regulation characteristics and the dynamic response performance