Integrated transmission vibration reduction technology based on the 'isolating-reducing-optimizing' method

摘要

Hydro-mechanical transmission devices that can transfer power from the engine to the actionmechanism are widely used in heavy-duty vehicles. It has many components, and the operatingconditions are complex and changeable. Multi-source excitations and load disturbances easilyaggravate vehicle vibrations, which has an adverse impression on the running quality of thewhole vehicle. Therefore, it is necessary to carry out research on the vibration problems caused bymultiple excitation sources. Thus, in this paper, a new vibration reduction method of “isolatingreducing-optimizing” for hydro-mechanical transmission devices is proposed to optimize suchdevices in multiple dimensions to improve their dynamic responses. This novel method optimizedthe coupling stiffness to isolate the vibration caused by the engine fluctuating torque. Moreover,the vibration energy decoupling method and optimization method are used to decouple the rigidbody vibration of the mounting system, and gear profile modification method based on a dynamicmodel is used to attenuate the internal high frequency vibration caused by the gear meshingexcitation. Finally, the steady-state conditions and cycle conditions vibration tests of the transmissionsystem before and after optimization are carried out. The time and frequency domainvibration responses of the transmission system before and after optimization are compared toverify the effectiveness of the optimization method.