Research And Application of Multi-wedge Belt Drive

The multi-wedge belt drive system has been widely used in the engine front end accessory drive system since the 1970s.

Because of its excellent performance, the wedge belt drive system is widely used as the front end accessory drive system of the engine. As a key component of the engine, the vibration and noise of the multi-wedge belt transmission system has a key influence on the vibration and noise of the engine.

According to the vibration and noise phenomenon of the multi-wedge belt drive system, the general model of the rotating vibration of the multi-wedge belt drive system is established based on the factors such as the creep of the belt and the damping of the wheel shaft. This model can be used to calculate the rotational vibration of a multi-wedge belt drive system with any type of arrangement. This paper introduces in detail how to linearize the motion equation of the wheel train by using Taylor expansion, so as to obtain the natural frequency and vibration response of the wheel train. Then, the vibration response of a six-wheel belt system is calculated and compared with some experimental results, and a good agreement is obtained.

Some measures and methods for controlling the rotating vibration of multi-wedge belt drive system are analyzed. The torsional shock absorber can reduce the input excitation of the train and thus reduce the vibration response of the train. Changing the position of the generator wheel can adjust the first-order resonance frequency of the wheel train. The unidirectional clutch device can greatly reduce the band tension fluctuation of the wheel train.

A set of software for calculating rotary vibration of multi-wedge belt drive system is developed and designed by using Matlab platform. This software can be used to calculate the rotating vibration of any type of multi-wedge belt gear train. This software uses the human-computer interactive input and output interface, which has a relatively good use convenience.