落锤式压力发生器气动控制系统设计

Design of pneumatic control system of drop weight impact pressure generator

在进行高压动态标定或模拟各种新型材料冲击载荷试验时,通常采用落锤式试验装置。为了便于落锤式压力发生器使用、操作和实验室布置,对其托锤、挂锤、二次接锤结构进行改进,提出采用一对无杆汽缸进行驱动,设计了气动控制系统,重点研究二次接锤过程动力学特性,建立其数学模型。试验结果表明,设计的气动控制系统响应时间小于0.1 s,能够进行二次托锤的最小落高为30 mm,不仅满足使用要求,而且整体结构紧凑。

Drop weight impact device is used in high pressure dynamic calibration or new material impact load testing.For convenient operation and lab using,the lifting,hanging and secondary holding weight structures of the device are improved.Two rodless cylinders are adopted to drive the component movement and the pneumatic control system is designed.The dynamic characteristic of the secondary holding weight is studied emphatically and its mathematic model is established.Experiment results indicate that the pneumatic control system can meet the requirements of the drop weight impact pressure generator.The response time of the pneumatic control system is less than 0.1 s.Under the condition of effective secondary holding weight,the minimum drop height is less than 30 mm.