金属带-行星齿轮无级变速器动力学研究

发布时间：2018-01-09 01:00

本文关键词：金属带-行星齿轮无级变速器动力学研究　出处：《农业机械学报》2016年12期 　论文类型：期刊论文

【摘要】：提出了一种金属带-行星齿轮无级变速器,能够扩大无级变速调速范围,同时兼顾传动效率。选取XP型顺时针环流型单环路系统,设计了金属带-行星齿轮无级变速器,通过无级变速和顺时针环流的模式切换,允许调速范围为0.5~3,循环功率小于系统输入功率的33%,对比了金属带和XP型顺时针环流型无级变速器效率特性,通过模式切换,该金属带-行星齿轮无级变速器能够有效优化传动效率。以Matlab/Simulink为平台建立整车仿真模型,选取UDDS循环工况,采用最佳燃油经济性控制策略,对金属带-行星齿轮无级变速器进行仿真。仿真结果表明:在整个UDDS循环工况下,金属带-行星齿轮无级变速器在低速大转矩时,工作于顺时针环流模式,高速时,工作于无级变速模式,能够兼顾变速范围和传动效率。同时,模式切换时,流过无级变速支路的功率流方向不变,有效避免了系统振动。
[Abstract]:In this paper, a metal belt planetary gear stepless transmission is proposed, which can enlarge the speed range of stepless speed change and take into account the transmission efficiency. The XP type clockwise circulation single loop system is selected. A continuously variable transmission with metal belt and planetary gear is designed. The speed range is 0. 5 ~ 3, and the cycle power is less than 33% of the input power of the system by the mode switching of the stepless speed change and clockwise circulation. The efficiency characteristics of metal belt and XP clockwise loop CVT are compared, and the mode switching is carried out. The stepless transmission with metal belt and planetary gear can effectively optimize the transmission efficiency. The simulation model of the whole vehicle is established on the platform of Matlab/Simulink, and the UDDS cycle condition is selected. The optimal fuel economy control strategy is used to simulate the stepless transmission with metal belt and planetary gear. The simulation results show that: under the whole UDDS cycle condition. The metal belt planetary gear CVT works in the clockwise circulation model at low speed and high torque, and in the stepless speed mode at high speed, which can take into account the speed range and transmission efficiency. At the same time, when the mode is switched. The direction of power flow through the continuously variable speed branch is invariable, which effectively avoids the system vibration.
【作者单位】：西安理工大学机械与精密仪器工程学院;榆林学院能源工程学院;
【基金】：国家自然科学基金项目(51175419) 陕西省教育厅专项科研计划项目(16JK1898) 榆林学院高层次人才科研启动基金项目(11GK48)
【分类号】：TH132.46
【正文快照】： 引言无级变速器(Continuously variable transmission,CVT)与行星齿轮组的组合称为功率分流无级变速器(Power split continuously variable transmission,PSCVT)[1-2]。在农业机械中,通过自动选择传动比,功率分流无级变速器能够提高田间生产率[3]。PSCVT有2种功率流:功率分流

【相似文献】