金属带式无级变速器带轮变形损失研究  

Research on Pulley Deflection Losses of Metal Belt CVT

作　　者：傅兵[1] 周云山[1] 高帅 李泉[1] 安颖[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]湖南江麓容大车辆传动股份有限公司,长沙410205

出　　处：《中国机械工程》2017年第12期1420-1426,共7页China Mechanical Engineering

基　　金：国家国际科技合作专项(2014DFA70170)

摘　　要：为了减少金属带式无级变速器变速机构的传动损失,分析了带轮变形损失机理,推导出带轮变形损失计算模型。基于某国产无级变速器的实际参数,引入由有限元方法建立的带轮轴向变形模型,定量分析了带轮变形所导致的楔入损失及进出口损失,获得了金属带速比、输入转矩对带轮变形损失的影响规律。分析结果表明:带轮变形损失随输入转矩的增大而增大,在最小速比和最大速比位置的损失大于中间速比位置的损失,其中楔入损失是构成带轮变形损失的主要部分;可通过提升带轮在最大工作半径处的等效轴向刚度来减小变形损失。最后通过台架试验验证了变形损失计算模型的可信性。In order to reduce the transmission loss of CVT, the loss mechanism of pulley deflec- tions was analyzed and a mathematical model of pulley deflection loss calculaton was derived. Based on the pulley deflection model which was established by using finite element method, the radial penetra- tion loss and the wedge loss caused by pulley deflections were quantitatively analyzed, the influence laws of CVT speed ratios and input torques on pulley deflection losses were concluded. The results show pulley deflection losses increase with the increases of input torques, the pulley deflection losses in maximum speed ratio and minimum speed ratio are greater than that in middle speed ratio, the ra- dial penetration loss is the main contributor to pulley deflection losses. The pulley deflection losses may be reduced by increasing pulley equivalent axial stiffnesses in maximum working radius.The calculation model was validated by the experimental data in test bench.

关 键 词：无级变速器 带轮变形 转矩损失 传动效率 

分 类 号：U463.212[机械工程—车辆工程]