某皮卡功率分流式行星排齿轮敲击噪声分析
荆东伟，李凯，孙邦江，何周峰，方贤兵
安徽江淮汽车集团股份有限公司，安徽 合肥 230601
摘要：为解决某皮卡4挡缓加速工况下混合动力变速箱行星排齿轮敲击问题，分析齿轮敲击的产生机理及混合动力变速箱行星排齿轮易发生敲击的原因。通过建立传动系统扭振模型，仿真分析阻尼、刚度、次级惯量等飞轮参数对飞轮减振性能的影响；结合电机转矩控制策略，对比分析普通双质量飞轮、离心摆式双质量飞轮的减振性能，并进行试验验证。结果表明：混合动力变速箱传动系统共振及电机转矩频繁换向造成双质量飞轮减振效果不足，从而引发行星排齿轮敲击；优化齿轮阻尼和刚度对飞轮的减振效果影响较小，而增加飞轮的次级转动惯量对飞轮的减振效果影响较显著，但受空间限制，飞轮次级惯量只能增大至0.05 kg·m2，此时次级飞轮2阶角加速度约为1 000 rad/s2，不满足次级飞轮2阶角加速度限值要求（小于500 rad/s2），齿轮仍存在轻微敲击现象；采用离心摆式双质量飞轮并结合电机转矩控制策略优化的方案，次级飞轮2阶角加速度降至约为400 rad/s2，满足限值要求，有效改善了混合动力变速箱的齿轮敲击现象。
关键词：功率分流式行星排齿轮；齿轮敲击；离心摆式双质量飞轮；角加速度
Gear rattle noise analysis of power-split planetary gear train for a pickup truck
JING Dongwei, LI Kai, SUN Bangjiang, HE Zhoufeng, FANG Xianbing
Anhui Jianghuai Automobile Group Co., Ltd., Hefei 230601, China
Abstract：Aiming to solve the planetary gear rattle issue of the hybrid transmission under the 4th-gear gentle acceleration condition of a pickup truck, the generation mechanism of gear rattle and the inducements for frequent gear rattle of planetary gear trains in hybrid transmissions are analyzed. By establishing the torsional vibration model of the transmission system, the effects of flywheel parameters such as damping, stiffness and secondary inertia on the vibration damping performance are simulated and analyzed. Combined with the motor torque control strategy, the vibration damping performances of the conventional dual mass flywheel and the centrifugal pendulum dual mass flywheel are compared and analyzed, and experimental verification is conducted. The results show that the resonance of the hybrid transmission system and frequent commutation of motor torque lead to insufficient damping effect of the dual mass flywheel, thereby causing planetary gear rattle. Optimizing gear damping and stiffness has a minor influence on flywheel vibration reduction, while increasing the secondary moment of inertia of the flywheel exerts a significant improvement. Restricted by structural space, however, the secondary inertia of the flywheel can only be increased to 0.05 kg·m2. At this moment, the 2nd-order angular acceleration of the secondary flywheel is approximately 1 000 rad/s2, which fails to meet the limit requirement (less than 500 rad/s2), and slight gear rattle still exists. By adopting the centrifugal pendulum dual mass flywheel combined with the optimization of motor torque control strategy, the 2nd-order angular acceleration of the secondary flywheel is reduced to about 400 rad/s2, satisfying the limit standard and effectively suppressing the gear rattle of the hybrid transmission.
Keywords: power-split planetary gear train; gear rattle; centrifugal pendulum dual mass flywheel; angular acceleration
