两级液压缸换级缓冲仿真与研究

摘要

A kind of two-stage hydraulic cylinder with buffering in the rodless cavity is proposed to reduce the hydraulic impact caused by stage change of multi-stage hydraulic cylinder. The working principle is introduced and the mathematical model of the buffering process is established while stage changing in the extension mode, and then, the two-stage cylinder model was established by AMESim software for simulation to study the pressure of the rodless cavity,the acceleration of the cylinder and the buffering effect while related structural parameters changing. The results in certain working conditions show that the two-stage hydraulic cylinder with buffering has weaker hydraulic impact and smaller vibration acceleration than the one with no buffering.In the end,the buffering effects of related structural parameters are analyzed.%针对多级液压缸换级时存在较大冲击的问题,提出一种无杆腔缓冲两级液压缸,介绍其工作原理,对缸筒伸出运动过程中的换级缓冲过程进行分析并建立数学模型,然后在AMESim中建立两级缓冲液压缸模型并仿真,观察换级前后无杆腔压力及缸筒加速度变化,对比研究不同结构参数下的缓冲情况.一定工况下的仿真结果表明:同普通两级缸相比,该两级缓冲液压缸具有较小的换级压力冲击,换级振动加速度小.最后对相关结构参数对换级缓冲的影响进行了分析.