中国机械工程

• 机械基础工程 • 上一篇    下一篇

金属带式无级变速器带轮变形损失研究

傅兵1;周云山1;高帅2;李泉1;安颖1   

  1. 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
  • 出版日期:2017-06-25 发布日期:2017-06-22
  • 基金资助:
    国家国际科技合作专项(2014DFA70170)

Research on Pulley Deflection Losses of Metal Belt CVT

FU Bing1;ZHOU Yunshan1;GAO Shuai2;LI Quan1;AN Ying1   

  1. 1.State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082
    2.Hunan Jianglu & Rundar Vehicle Transmission Co.,Ltd.,Changsha,410205
  • Online:2017-06-25 Published:2017-06-22

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。

关键词: 无级变速器, 带轮变形, 转矩损失, 传动效率

Abstract: In order to reduce the transmission loss of CVT,the loss mechanism of pulley deflections 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 penetration 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 radial 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.

Key words: continuously variable transmission (CVT), pulley deflection, torque loss, transmission efficiency

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