The multi-load operation condition is usually the feature of hydraulic systems. In order to study the influence of shifting-load on the pressurized valves, internal flow field of the pressurized valves is numerically simulated and experimentally tested. In the experiments, the influence of the flow rate and the inlet pressure on the outlet vibration of the pressurized valve is analyzed. It is found that the vibration acceleration level at the outlet flange of the pressurized valve increases gradually with the increasing of the flow rate and the inlet pressure. In the condition of large flow rate and high inlet pressure, increase of the flow rate and the inlet pressure has only small influence on the outlet vibration acceleration level, and it causes the increase of the vibration acceleration level and decrease of its amplitude. This conclusion has some reference significance for practical engineering.%液压管路系统具有多工况运行的特点,为研究工况对承压阀振动的影响,对承压阀进行了内部流场仿真分析与试验研究,分别以流量与进口压力参数变化对承压阀出口法兰振动总级的影响规律为对象进行综合分析,通过分析发现,随着流量与进口压力的增加,承压阀的出口法兰处振动加速度总级逐渐增大;在大流量与高进口压力状态下,流量与进口压力的增加对承压阀出口法兰处振动加速度总级的影响作用逐渐减弱,振动加速度总级随之增加幅值减小.该结论在现实工程中具有一定的参考意义.
展开▼
