【摘要】 目前气液增力缸的力行程一般只有10~30 mm,使其应用受到了较大限制。为扩大其使用范围,设计了一款力行程达100 mm的气液增力缸,采用淡水作为液压介质。通过仿真软件AMESim对气液增力缸一个工作周期的主要工作特性进行了建模及数值计算仿真,得到了气液增力缸主要工作参数在各个工作过程中的变化特征。针对采用气控节流阀在大力行程气液增力缸控制上存在的问题,提出一种更优的采用电磁控制换向阀的控制方案,并提出增加弹射弹簧的新结构,有效地提高了气液增力缸的工作效率。更多还原

【Abstract】 The application of pneumatic-hydraulic intensifier cylinder is restricted due to its rather short power stroke of only about 10 ~ 30 mm. A pneumatic-hydraulic intensifier cylinder with a power stroke of 100 mm is designed,and fresh water is used as the working medium. Simulations by the software AMESim are conducted on a complete work cycle of pneumatic-hydraulic intensifier cylinder,and the change characteristics of the main performance parameters are clearly shown. To overcome the drawbacks of the present control design in which a flow control valve is used,an optimal control scheme is put forward and validated by simulation. A new structure of adding an ejection spring is devised,and it can shorten the time of power stroke and improve the efficiency.更多还原