Research on the Performance of Hydraulic Excavator with Pump and Valve Combined Separate Meter In and Meter Out Circuits

doi:10.3901/JME.2016.12.173

Abstract

Abstract: Conventional hydraulic actuator is controlled by mechanically connected orifices valve. This controllability of this method is poor and the energy consumption is huge especially under the over-running condition. So a novel system configuration is presented, in which boom cylinder, stick cylinder and swing motor are controlled with separate meter in and meter out technology, bucket cylinder and travel motors are controlled with conventional valves. A virtual prototype is established,which consists of the hydraulic excavator mechanical structure with multi-body dynamics and electro-hydraulic system. The dynamic, static performances as well as the energy consumption characteristics of the boom, arm and swing actuators are investigated under the condition of load sensing hydraulic system and the proposed system. After that, the physical prototype based on the proposed configuration system is established and its performance is tested. The experimental results show that the accuracy of the virtual prototype is validated, the proposed configuration system can significantly decreases the pressure losses through the valve and improve the energy efficiency of the machine; the pressure shocks within hydraulic actuators is decreased as well, thus the stationarity of the whole machine is improved accordingly.

Key words: flow matching, pressure and flow combined control, pump and valve hybrid control, separate meter in and meter out

CLC Number:

TH137

DONG Zhixin, HUANG Weinan, GE Lei, QUAN Long, HUANG Jiahai, YANG Jing. Research on the Performance of Hydraulic Excavator with Pump and Valve Combined Separate Meter In and Meter Out Circuits[J]. Journal of Mechanical Engineering, 2016, 52(12): 173-180.

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