论文部分内容阅读
通过理论分析和计算得出传统液压挖掘机回转系统在运动过程中各部分能量损失大小,证明了液压挖掘机回转系统节能的必要性。以此为基础提出了一种基于制动能量回收的混合动力挖掘机回转系统设计方案,通过采用二次元件液压泵/电机的四象限工作特性以及加装液压蓄能器来实现能量的充放,同时采用速度和压力双控的控制策略来控制蓄能器能量的释放。运用MATLAB/Simulink建立其仿真模型对设计方案可行性、节能性进行验证。仿真结果表明该设计方案节能效果明显,为今后混合动力挖掘机回转机构能耗分析和方案设计提供了参考。
Through the theoretical analysis and calculation, the energy loss of each part of the traditional hydraulic excavator slewing system during the movement is obtained, which proves the necessity of energy saving for the hydraulic swing excavator. Based on this, a design scheme of hybrid excavator rotary system based on braking energy recovery is proposed. By using the four-quadrant working characteristic of the secondary pump / motor and the hydraulic accumulator, the energy charging and discharging , While using speed and pressure control strategy to control the energy storage of the release of energy. The use of MATLAB / Simulink to establish its simulation model of the feasibility of the design, energy-saving verification. The simulation results show that the design scheme has obvious energy-saving effect and provides a reference for the energy consumption analysis and scheme design of the rotary mechanism of the hybrid excavator in the future.