【作者】 孙振中；

【导师】 崔亚辉；

【作者基本信息】 西安理工大学 ， 机械设计及理论， 2010， 硕士

【摘要】 本文通过对并联混合动力汽车的动力合成装置——差动轮系进行了理论分析与试验研究,从差动轮系稳态特性和动态特性两个方面出发,系统地验证了差动轮系稳态特性理论的正确性；从能量的角度建立了差动轮系动力学方程并提出了求解办法,与试验结合,得到了系统在能量变换过程中的瞬态变化情况。为实际工程应用提供理论与试验支持。首先对差动轮系稳态特性理论进行了全面详细的理论研究,并通过差动轮系试验,对差动轮系稳态特性基础理论进行试验研究。在试验台上搭建了2K-H型WW式差动轮系,采集在不同转速、扭矩下的试验数据,通过对试验数据与理论计算结果的对比分析,研究并讨论了传动比、转矩、功率及效率等差动轮系稳态特性指标,为理论基础研究提供依据。在此基础上,对差动轮系的转速和转矩灵敏度问题进行了详细的分析,并通过试验研究加以分析。进而从差动轮系转速、转矩灵敏度的角度提出了试验台的改进方案。其次从能量的角度出发,应用分析力学耗散理论,从全新的角度对差动轮系进行了动力学分析。基于摩擦学及弹性流体动力润滑等理论,将耗散函数引入到差动轮系动力学方程中。通过运用拉格朗日第二类方程,应用变分原理,求解广义坐标下的广义力,建立起完整系统的动力学方程,并提出动力学方程的仿真求解办法及耗散力参数的参数识别方法。通过对动力学方程组的求解、仿真分析,结合试验所得数据,得出了试验用差动轮系瞬态变化特性,从而考察了差动轮系转速、转矩的瞬态灵敏度,为实际应用提供了理论和试验依据。更多还原

【Abstract】 The theoretical analysis and experimental study of the power synthesis device of the parallel hybrid electric vehicle-differential gear train is accomplished in the thesis, the correctness of the Theory of Steady State Characteristics of the differential gear train is systematically verified in this thesis in two different aspects of steady-state and dynamic characteristics. The establishment and solve method of kinetic equation of the differential gear train is achieved from the energy point. The transient change of the system in the process of energy transformation is acquired combined with the experiment, which provide a theoretical and experimental support for the practical engineering applications.A comprehensive and detailed theoretical research on steady-state characteristics theory of differential gear train is accomplished at first, its experimental study is then finished by differential gear train testing. A 2K-H type WW-like differential gear train is built in test bench to acquire the experimental data under different rotational speed and torque, the parameters of steady-state characteristics of the differential gear train such as transmission ratio, torque, power and efficiency are studied and discussed, which lay a foundation to the basic theoretical research. Based on this, the sensitivity issue of the rotational speed and torque of the differential gear train is analyzed in detail by the experimental study. A work bench improvement plan is proposed from the aspect of system rotational speed and torque sensitivity of the differential gear train.Second, from the energy point, the dynamic analysis on the differential gear train is carried out in a new perspective using dissipation theory of analytical mechanics. Based on tribology and flexibility hydrodynamic lubrication theory, the dissipation function is introduced to the system dynamics equations of the differential gear train. The establishment of complete system dynamic equations and simulation solving approach and dissipative force parameter identification methods are achieved using second category Lagrange equation and variational principle. The transient change characteristics of the tested differential gear train are achieved by solving dynamic equation, simulation results combined with the test data, which examined the system rotational speed and transient sensitivity torque to provide a theoretical and experimental support for the practical engineering applications.更多还原