摘要
建立了电控液驱车辆能量再生系统各元件蓄能器、变量泵/马达、飞轮以及液压回路的分析模型和系统模型.以蓄能器压力和温度、泵/马达的转矩和效率、压力损失和飞轮的转速为时间参变量,采用四阶Runge-Kutta算法求解微分方程.用以此计算的系统变量确定能量损耗和循环效率.实验结果表明：能量损耗主要产生于液压泵/马达,约占总能量损失的32.64%;系统循环效率在62%～89%;损失能量回收率76%,能量损耗与蓄能器的有效容积、飞轮的初速度和转动惯量有关.
The models of the energy regeneration system that consist of an accumulator, a variable displacement pump/motor, connecting lines and flywheel have been set up. In order to solve the differential equations, the fourth order Runge-Kutta integration method was selected. The results showed that of the 32. 64 % of the total energy loss was attributable to the hydraulic pump/motor. The variation in constant-volume specific heat of gas was less than 2%, constant thermal time was 60 s, accumulator was found to operate essentially and adiabatically with little thermal loss. During a series of experiments, energy was repeatedly transferred between the hydraulic accumulator and the flywheel through the pump/motor. Computed system varied favorably in comparison with the experimental results. At moderate and high motor/pump displacement, the round trip efficiency varied from 62%- 89%. It was lower at small displacement. Efficient saving rate of the loss energy was 76%, and related to the effective volume of accumulator, initial speed and inertia of flywheel.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2006年第10期31-34,共4页
Transactions of the Chinese Society for Agricultural Machinery
关键词
车辆
静液压传动
能量回收
循环效率
Vehicle, Hydrostatic transmission, Energy regeneration, Round trip efficiency
