doi:10.16186/j.cnki.1673-9787.2020010024

Received:2020/01/07

Revised:2020/05/25

Published:2021/05/15

Study on a closed-loop hydraulic energy recovery system

SUN Gang1, HU Wanqiang1, WEI Shiqian2

1.School of Electrical & Mechanical Engineering， Xuchang University， Xuchang  461000 ， Henan， China;2.Editorial Department of Journal， Xuchang University，Xuchang  461000 ， Henan， China

Abstract:At present， the rotating load energy regeneration system have the disadvantages of low efficiency and high cost. Based on the closed-loop hydrostatic transmission system， a new type of hydraulic energy recovery system was proposed ， which was mainly composed of pump ， pump/motor， accumulator， directional control valve and other hydraulic components. The pump/motor was driven to make the load to rotate by the hydraulic pump and accumulator when driving， and the kinetic energy of the load was converted into hydraulic energy and stored in the accumulator when braking. The kinetic energy was recovered without the reversal of fluid flow. Firstly， the system was modeled. Secondly， a hierarchical control system composed of upper controller and main controller was designed. In view of the instability and inaccuracy of the system model， the secondary controller in the main controller was designed as an adaptive fuzzy sliding mode controller. Finally， the energy utilization rate of the system was analyzed， and its influence on the energy recovery potential was also analyzed. The results showed that the energy recovery rate of the system could reach 66.4% in the process of braking， and the energy saving rate could reach 35. 5% in the start-up compared with other schemes， which proved the effec tiveness of the designed scheme and the scientific of the control system.

Key words:energy recovery;closed-loop hydraulic system;hierarchal control system;directional adaptive fuzzy sliding mode control;hydraulic accumulator

一种闭环液压能量再生系统研究_孙刚.pdf