Research on Maneuverability Optimization of Negative Control Excavator

IEEE Access

卷:10

Xiaoming Yuan¹  Wenbo Fu¹  Zhaoliang Meng¹  Lijie Zhang¹ 

[1] Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao, China;

关键词: Excavator;    electro-hydraulic valve;    swing braking stability;    flow distribution;    optimization;   

DOI  :  10.1109/ACCESS.2022.3174200

来源: DOAJ

【 摘 要 】

In order to improve the swing braking stability and flow distribution characteristics of negative control excavator, this paper proposes a hybrid electro-hydraulic main valve, which sets a pressure reducing valve in each of the two control chambers of main valve to adjust its control pressure difference, so that the valve opening can be adjusted to optimize the excavator maneuverability. For the braking oscillation tendency of swing action, an anti-reverse control strategy is designed, which actively releases the motor brake pressure by adjusting the flow area of oil return orifice, thereby preventing the brake pressure from outputting power to the motor in the reverse direction. For the uncoordinated flow distribution of swing-boom compound action, an action priority control strategy is designed, which redistributes the dual-pump flow to swing motor and boom cylinder according to the operator’s manipulation needs. Based on the key hydraulic-structural parameters and test data, a simulation model of a 37-ton negative control excavator that can accurately simulate the swing action and boom lifting action is built, and the system operating characteristics before and after optimization are analyzed, the results show the proposed control strategies can suppress the swing rebound phenomenon and improve the controllability of actuator flow ratio.

【 授权许可】

Unknown