多楔带传动系统振动建模及带段横向振动控制的研究

Dynamic modeling of serpentine belt drive systems and the tranverse vibration control of the belt

单根多楔带驱动附属设备被广泛应用到汽车工业中,这种驱动方式的显著特点是装有自动弥补带中张力波动的张紧器。文中利用Hamilton原理建立多楔带传动系统的梁耦合振动模型;研究稳定状态下,张紧器设计参数对各带段横向变形的影响;以稳定状态下带段的最大横向变形最小和张紧器有效性系数最大为目标,通过优化张紧器设计参数,实现对带段横向振动的控制。计算结果表明,通过对张紧器设计参数的优化,各带段的横向振动变形显著降低,系统中的旋转振动和横向振动间的相互影响减弱。文中建立的多楔带传动系统振动模型、带段横向振动控制方法及相关求解技术可用于带传动系统和张紧器的设计与优化。

Serpentine belt with multi-ribbed driven system are wiedly used in the automotive industry to drive engine front end accessories, such as the alternator, air conditioner, power steering pump, and so on. An important component in a serpentine belt driven system is a tensioner that can automatically compensate for tension changes in the belt. In this paper, a serpentine belt system model incorporating bending stiffness of the belt is established using Hamilton equation. The influences of design variables of a tensioner on the equilibrium deflections are investigated using the model. An optimization method to reduce the maximum transverse deflections of the belt span and increase the tensioner effectiveness is presented. The calculated results show that with the optimized tensioner, the maximum transverse deflection of the system is suppressed effectively, and the coupling between the pulley vibration and the span vibration is also reduced. The dynamic modeling method for the serpentine belt driven systems and the belt transverse vibration control method presented in this paper can be used for the optimization design of the belt driven system. And also it is useful to estimate the design parameters of a tensioner.