金属带式无级变速器钢环摩擦损失

doi:10.3901/JME.2018.14.169

机械工程学报 ›› 2018, Vol. 54 ›› Issue (14): 169-178.doi: 10.3901/JME.2018.14.169

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金属带式无级变速器钢环摩擦损失

傅兵, 周云山, 胡哓岚, 李航洋, 刘云峰, 张飞铁

湖南大学汽车车身先进设计制造国家重点实验室长沙 410082

收稿日期:2017-08-30 修回日期:2018-05-07 出版日期:2018-07-20 发布日期:2018-07-20
通讯作者: 张飞铁(通信作者),男,1978年出生,博士,助理教授。主要研究方向为自动变速器控制、新能源汽车动力总成控制。E-mail:flyiron@126.com
作者简介:傅兵,男,1987年出生,博士研究生。主要研究方向为无级变速器、新能源汽车传动系统。E-mail:fubingemail@163.com;周云山,男,1957年出生,博士,教授,博士研究生导师。主要研究方向为无级变速器、新能源汽车传动系统。E-mail:zys_8888@sina.com
基金资助:
国家国际科技合作专项（2014DFA70170）和国家自然科学基金（51475151）资助项目。

Friction Loss of Steel Rings in Metal V-belt CVT

FU Bing, ZHOU Yunshan, HU Xiaolan, LI Hangyang, LIU Yunfeng, ZHANG Feitie

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082

Received:2017-08-30 Revised:2018-05-07 Online:2018-07-20 Published:2018-07-20

摘要/Abstract

摘要： 针对现有金属带式无级变速器（Continuously variable transmission，CVT）传动效率偏低的问题，以某国产CVT为研究对象，在推导钢环压力模型的和钢环运动学模型的基础上构建钢环摩擦损失计算模型，分析出钢环摩擦损失的分布特性及产生机理。研究表明：钢环摩擦损失随输入转矩及转速的增加而增大，其在中间档（Medium ratio，MED）速比至超速档（Overdrive ratio，OD）速比区间上对输入转速的敏感性高于中间档速比至低速档（Low ratio，LOW）速比区间；整个速比范围内，钢环摩擦损失呈近似V状分布；各层钢环的摩擦损失由内至外逐层减小，首层钢环损失是钢环摩擦损失的主要构成部分，节圆间距是导致首层钢环损失的根本原因。计算模型的可信性得到了台架试验的验证。最后根据分析结果提出一种改进的金属带结构，通过将节圆间距设置为零，可大幅降低钢环摩擦损失。为从金属带结构层面改善CVT传动效率提供了一种新的设计思路。

关键词: 传动效率, 钢环, 节圆间距, 金属带改进, 摩擦损失, 无级变速器

Abstract: In view of the problem of low transmission efficiency of existing continuously variable transmission(CVT), taking a domestic CVT as the research object, the friction loss calculation model of steel ring is established based on the force model and the kinematic model of steel rings, and the distribution characteristics and mechanism of the steel ring friction loss are analyzed. The analysis results show that the friction loss of steel ring increases with the increase of input torque and rotational speed, and the sensitivity of friction loss to input rotational speed is higher in range of MED to OD than that of MED to LOW, the friction loss of steel ring is approximately V-shaped in the whole range of speed ratio, the friction loss of each layer steel ring is reduced from inner to outer, the friction loss in innermost steel ring is the main component of total steel ring friction loss, and the pitch circle distance is the root cause of the loss in innermost steel ring. The reliability of the calculation model is verified by the test. Finally, according to the analysis results, an improved structure of metal belt is proposed, which can greatly reduce the friction loss of steel ring by setting the pitch circle distance to zero. This provides a new design idea for improving CVT transmission efficiency from optimization of metal belt structure.

Key words: continuously variable transmission, friction loss, improved metal v-belt, pitch circle distance, steel ring, transmission efficiency

中图分类号:

U463

傅兵, 周云山, 胡哓岚, 李航洋, 刘云峰, 张飞铁. 金属带式无级变速器钢环摩擦损失[J]. 机械工程学报, 2018, 54(14): 169-178.

FU Bing, ZHOU Yunshan, HU Xiaolan, LI Hangyang, LIU Yunfeng, ZHANG Feitie. Friction Loss of Steel Rings in Metal V-belt CVT[J]. Journal of Mechanical Engineering, 2018, 54(14): 169-178.

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金属带式无级变速器钢环摩擦损失

Friction Loss of Steel Rings in Metal V-belt CVT

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