金属带式无级变速器带轮变形摩擦损失分析

戴兴梦; 胡玉梅; 余媛媛; 何造; 李孟飞

doi:10.13433/j.cnki.1003-8728.20200130

金属带式无级变速器带轮变形摩擦损失分析

doi: 10.13433/j.cnki.1003-8728.20200130

1.
重庆大学机械工程学院, 重庆 400044
2.
重庆大学机械传动国家重点实验室, 重庆 400044

详细信息

作者简介:
戴兴梦(1995-), 硕士研究生, 研究方向为车辆结构分析与计算机辅助设计, xddxwm@126.com

通讯作者:
胡玉梅, 教授, 博士生导师, cdrhym@163.com

中图分类号: TG156
计量
- 文章访问数: 188
- HTML全文浏览量: 31
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-28
- 刊出日期: 2021-06-01

Analysis of Friction Loss Induced by Pulley Deformation of Metal Belt CVT

1.
School of Mechanical Engineering, Chongqing University, Chongqing 400044, China
2.
State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China

摘要

摘要: 金属带式无级变速器(CVT)的带轮变形会导致金属带沿着带轮锥面发生径向偏移, 从而使得系统产生摩擦损失, 严重影响变速机构的传动效率。以某国产CVT为研究对象, 建立了带轮变形摩擦损失模型并利用ANSYS软件对金属带式无级变速器传动部分进行有限元仿真分析。分析结果表明: 速比是影响带轮变形的主要因素, 带轮锥面最大变形量随着工作半径减小而逐渐减小。同时, 从摩擦损失模型可以看出发生在带轮工作半径上的最大变形量是影响摩擦损失的主要因素, 带轮摩擦损失在传动比较大或较小时达到最大值, 并且随着输入转矩的增加摩擦损失也随之而增加。
- 金属带式无级变速器 /
- 带轮变形 /
- 摩擦损失
Abstract: The pulley deformation of metal belt continuously variable transmission (CVT) causes the metal belt to shift radially along the cone surface of the pulley, thereby causing friction losses in the system and seriously affecting the transmission efficiency of the transmission mechanism. In this paper, a domestic CVT is taken as the research object, a model for metal belt deformation friction loss is established and the ANSYS finite element software was used to simulate and analyze the transmission part of the metal belt continuously variable transmission. The analysis results show that the speed ratio is the main factor affecting the pulley deformation. As the working radius decreases gradually, the maximum deformation of the tapered surface of the pulley decreases. At the same time, it can be seen from the friction loss model that the maximum deformation amount occurring on the working radius of the pulley is the main factor affecting the friction loss. The friction loss of the pulley reaches its maximum when the transmission is relatively large or small. And as the input torque increases, the friction loss also increases.
- continuously variable transmission /
- pulley deformation /
- friction loss

HTML全文

图 1 CVT结构示意图

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图 2 金属环微元受力分析

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图 3 金属块微元受力分析

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图 4 从动带轮轴向夹紧力

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图 5 主动带轮轴向夹紧力

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图 6 带轮变形模型

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图 7 金属带运行轨迹示意图

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图 8 金属带有限元模型

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图 9 CVT传动部分有限元模型

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图 10 带与带轮上关键节点的相对距离

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图 11 速比不同时主动带轮可动半轮变形云图

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图 12 主动带轮上金属带工作半径处的轴向变形曲线

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图 13 主动带轮工作半径处最大变形量与传动比、转矩关系

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图 14 从动带轮工作半径处最大变形量与传动比、转矩关系

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图 15 金属带摩擦损失与传动比关系

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图 16 金属带变形损失与转矩关系

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表 1 金属带式CVT结构参数

参数名称及单位	数值
金属带类型	28/10/1.8/229.4
最大输入扭矩/(N·m)	350
装配中心距/mm	173
带轮轴半径/mm	20
周长/mm	714.4
重量/g	1560
金属片数量	397
金属片厚度/mm	1.5
每侧钢环数量	10
锥面距离/mm	38±0.05
带轮锲角/(°)	11
带轮材料	20CrMoH
带与带轮间摩擦因数	0.09

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