基于恒压液压系统的ZL50装载机节能技术

为解决ZL50装载机油耗高的问题,构建了新的液压系统.首先阐明了恒压液压系统的节能原理,引出一种新型二次调节元件--液压变压器.随后建立液压变压器排量及压力的数学模型,并在液压变压器配流盘控制角-90°～90°内仿真,分析其排量与压力特性.在此基础上构建装载机新的液压系统,分析其工作过程并与原液压系统比较,得出其节能原...

Energy-saving technique for loader ZL50 based on constant pressure hydraulic system

A new hydraulic system was built for the wheel loader ZL50 to save its energy consumption. The energy-saving principle of the constant pressure hydraulic system was described and a new secondary regulation component hydraulic transformer(HT) was introduced. A mathematical model was established for the displacement and pressure of the HT, and the simulation was performed for the HT under its port plate control angle -90°~90° to analyze its displacement and pressure characteristics. A new hydraulic system was built on this basis and its working process was analyzed and compared with the original hydraulic system to reveal its energy-saving potential. The parameters of the main components of the new hydraulic system were defined by the power consumptions of the loader under different operating conditions. The simulation under main pump speeds 0~2200 r/min indicates that the installation power of the new system was reduced to 43% of the original system, showing the clear energy-saving benefit.