In the electromagnetic environments, the mechanical electrical hydraulic control system of engineering machinery's electromagnetic sense organs is susceptible to electromagnetic interference, which will in turn cause failures due to the change of the mechanical electrical hydraulic control system's input and output. According to engineering machinery hydraulic system control principle, based on the study of the structural features and the non-linear magnetic properties of shell materials, this paper analyzes the change of electromagnetism in the proportional solenoid around the output air gap in the electromagnetic environments, the electro-hydraulic proportional variable displacement pump's load sensing control system, the electric-hydraulic proportional control mediation, with respect to the hydraulic system property and affecting factors on the system performance, and proposes a mechanical model of proportional solenoid in the electromagnetic environments. System output performance will be changed by the action of the output force change in the proportional solenoid for the load sensing control component. Using antennas to emit electromagnetic wave to generate the electromagnetic environments, we analyze the proportional solenoid changes on the impact of the variable pump performance in the electromagnetic environments, by testing the electric proportional variable pump's output pressure. Experimental results show that the electric proportional variable pump's output pressure is elevated and the mechanical electrical hydraulic control system's control performance will become unstable. One should improve the anti-jamming capability of electromagnetic sense organs.
Effect of Electromagnetic Environment on the Performance of Electric Proportional Variable-capacity Pump[J]. Science & Technology Review, 2010, 28(05): 91-95
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