速度-转矩控制橡胶V-带变速器设计新方法

A New Approach to the Design of A Speed-Torque-Controlled Rubber V-Belt Variator

本文对一个转矩-速度-传感橡胶V-带变速器提出了一个新的模型,在驱动侧作动器是个离心滚子,而一个斜转矩凸轮加一个压缩扭力弹簧则在从动侧。方程式许可设计作动器几何学,以便保持传递转矩在要求的整个工作区间内尽可能转矩闭合。此外,推荐了这类自动变速器最合适的一种设计方法,它许可选择变速器要求的变程,即发动机和变速器之间的匹配以及作动器设计:滚子质量,壳体形状,离心滚子作动器接触扳角度,转矩凸轮作动器斜导轨的斜率。而且发动机变速器匹配对于固定作动器可以作部分负荷计算。本方法已在合适的台架上进行试验证实。

This paper presents a new model for a torque-speed-sensing rubber V-belt variator. The actuators are of the centrifugal roller kind on the driver side and a helical to torque cam plus a compression-torsion spring on the driven side. The equations permit designing the actuator geometry in order to keep the transmissible torque as close as possible to the torque request in the whole operative field. Moreover, a procedure is suggested for the most proper design of an automatic variator of this kind. It permits choosing the required variogram of the transmission, i.e. the matching between the engine and the transmission, and designing the actuators： roller mass, housing shape, contact plate angle for the centrifugal roller actuator, and helical guide slope for the torque cam actuator. Furthermore, the degree of engine transmission matching can be calculated at part load for fixed actuators. Extensive experimental tests were carried out on a proper bench test to validate the procedure.