Modeling and analysis based on AMESim full hydraulic steering system
                                                  ZHANG Yinghe1, GUOFeng1, YANG Shiqiang2
（1.School of Mechatronical Engineering, Xian Railway Vocation & Technical Institute, Xian 710026, China;2.School of Mechanical and Precision Instrument Engineering, Xian University of Technology, Xian 710048, China)

Abstract: Aiming at the problems that the hydraulic transmission system built for the fixed pump has low transmission efficiency, serious pressure and flow loss, etc, the loadsensitive variable displacement pump technology was applied to the full hydraulic steering system. The structure of steering gear, priority valve and loadsensitive variable displacement pump in the steered system was elaborated, and it was modeled by AMESim simulation software. Based on the AMESim simulation model, the full hydraulic steered system was simulated and analyzed. The results indicate that the steering speed is 30 r/min and 40 r/min, the pressure and flow output is relatively stable. The priority valve can adjust the flow of the steering gear. The amount of output flow can be controlled by the variable pump when the inclination angle of the pump is within 20°.The loadsensing full hydraulic steering system minimizes pressure and flow losses and increases transmission efficiency.

Key words: AMESim; full hydraulic steering system; steering gear; load sensitive variable pump