一种新型液压脉冲发生器的试验研究

提出一种适用于冲击碰撞试验的锥形间隙小孔组合节流液压脉冲发生器。通过调节节流面积和碰撞速度等参数，运用试验方法研究了脉冲发生器的负载自适应性、运动负载制动的高效性、脉冲波形可调性以及油液温升特性等机械动态特性。试验结果表明，采用开环控制方法调节节流口的通流面积来实现脉冲波形的调节正确可行，脉冲发生器可以满足相应冲击试验的要求。

Experimental Investigation on Characteristics of a Novel Hydraulic Shock Pulse Generator

A novel structure of shock pulse generator with combination of throttling by coneshape spool and orifice was presented herein. Its mechanical dynamic properties were demonstrated experimentally such as: being able to selfadapt to the external loads applied to it; with high efficient dissipation of kinetic energy instantly; prompt and easy adjustment of the widths and amplitudes of shock pulses by changing the equivalent flow area of the damping orifices and the gap between the cone and inter wall of the cylinder. The experimental results indicate the feasibility of the openloop control approach by changing the equivalent flow area to control the pulse waveform and the shock pulse generator can meet the requirements of various impact tests.