金属推块V型带CVT在高速的非稳态动力学

On the Transient Dynamics of A Metal Pushing V-Belt CVT at High Speeds

CVT(无级变速器)提供的连续速比间的要求有限。目前已经开发了许多稳态模型,说明CVT的动力学,但它们不能阐述带高速时惯性对CVT性能产生的影响。本研究将着重于开发一种详细的非稳态模型来探索和了解不同的动力特性对金属推块V型带CVT的相互影响,本文采用连续的库仑(Coulomb)摩擦理论近似模拟带和带轮之间的摩擦。许多研究旨在观测惯量和滑动情况下的载荷状态对CVT传递转矩能力的影响。讨论了计算简图数学模型和不同载荷方案的相应结果。该结果表明惯性对CVT转矩传递特性的显著影响。

A CVT offers a continuum of gear ratios between desired limits. A number of steady-state models have been developed in recent years to explain the dynamics of CVT; however, they are unable to capture the influence of high-speed inertial effects of the belt on the performance characteristics of a CVT. The present research focuses on developing a detailed transient model to explore and understand the various dynamic interactions in a metal pushing V-belt CVT. This paper uses continuous Coulomb friction approximation theory to model friction between the belt and the pulleys. Studies were conducted to observe the influence of inertial and loading conditions on the slip behaviour and torque transmitting ability of the CVT. The computational scheme, the mathematical models, and the results corresponding to different loading scenarios are discussed. The results indicate the significance of inertial effects on the torque transmission characteristics of a CVT.