基于AMESim全液压转向系统的建模与分析

Modeling and analysis based on AMESim full hydraulic steering system

针对定量泵构建的全液压转向系统工作时传动效率低、压力和流量损失严重等问题,将负载敏感式变量泵技术应用到全液压转向系统中。对转向系统中转向器、优先阀及负载敏感式变量泵的结构进行了详细阐述;利用AMESim仿真软件对转向系统进行了建模;基于AMESim仿真模型对负载敏感式全液压转向系统进行了仿真分析。研究结果表明:转向器转速在30r/min和40r/min时,压力和流量输出相对稳定;优先阀对转向器可起到流量调节作用;负载敏感式变量泵倾斜角在20°内能够控制输出流量的大小;负载敏感式全液压转向系统能够最大限度地减少压力和流量损失,从而提高传动效率。

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.