基于AMESim和Simulink的水压机空行程-提升过程液压冲击仿真分析

Hydraulic Impact Simulation on the Progress of Descending Changing to Lifting Stroke in 300MN Hydraulic Press Based on AMESim and Simulink

水压机水路系统各管道存在液压冲击现象。根据AMESim和Simulink软件各自特点及接口技术,建立了水路系统的AMESim仿真模型和主分配器阀的Simulink开启控制模型,并使用"Co-simulation"接口实现两模型的联合仿真。仿真分析了活动横梁速度在空行程时随凸轮转角变化的规律,以及空行程突然改变到提升状态时提升缸管道内液压冲击的变化过程。仿真结果表明:当空行程时凸轮转角不超过活动横梁最大速度时的角度值,空行程改变到提升状态过程中提升缸管道内液压冲击值较小,并且活动横梁速度减小则液压冲击值减小。

Hydraulic impact exists in each pipe of the hydraulic press. According to respective features of AMESim and Simulink, simulation model based on AMESim and controlling model based on Simulink were established. Co-simulation was realized by Co- Simulation interface. The progress of the velocity of moving beam firstly increasing and then decreasing during the cam angle increasing was analyzed. In addition, the hydraulic impact in the situation of descending stroke changing to lifting stroke was analyzed. Results shows that： in order to decrease the hydraulic impact of descending stroke changing to lifting stroke, to control cam angle less than the angle which makes the greatest velocity of moving beam is a good method, moreover, hydraulic impact weakens when the velocity of moving beam decreases.