金属带式无级变速器摩擦传动模型分析

On Friction-drive Model of Metal Belt Continuously Variable Transmission

根据金属带式无级变速器(CVT)中带及带轮的运动传递关系,推导了传动过程中金属片推力、带环张力及主、从动带轮夹紧力的力学关系。以此为基础,综合考虑CVT运行过程中金属带偏斜、多向运动、滑移等因素对金属带及带轮受力的影响,同时考虑了金属片间隙以及金属片在主动带轮静弧段和动弧段的受力特点,建立了CVT摩擦传动模型,分析了金属带运行路径、摩擦因数、滑移率等因素对传动性能的影响。研究结果为进一步研究金属带式无级变速器滑移控制模式下的瞬态动力学模型建立了基础。

Through the analysis of the motion transmission relationship between the V-belt and pulleys of the metal belt continuously variable transmission(CVT), it was derived that the mechanical relationship between compressive force in the belt elements, tensile force in the band pack and axial clamping force of driver and driven pulley in the transmission process. On the basis of the mechanical relation that was derived before, some influence factors on the force in the metal V-belts and pulleys were overall considered in the model, including the metal V-belt deflection and multi-direction movement and the slipping in the operation process, etc, the gap of belt elements and the force characteristic of belt elements between the idle and active arcs of the touching section of the drive pulley were also taken into consideration, the CVT friction-drive model was established, and the effect that some factors such as metal V-belt operating path and friction coefficient and slip rate acted on the transmission function was analysised. The study results laid fundamental for further research of the transient model development for the metal belt continuously variable transmission(CVT).