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本发明是在内部和外部超压条件下脉动的波纹管的动态试验装置。波纹管是相当易于破坏的机械部件之一。评定破坏特性所需要的基本数据,一般是在改变行程及在恒定的压力和温度条件下通过动态试验获得的。在恒定压力下进行的试验,只是给予波纹管以保守的评价,为了获得波纹管使用可靠性的更准确的数据,必须在恒定行程内改变压力进行试验。波纹管可能由于脉动加载(从0到100%最大工作压力)而承受外部超压负荷。提供这种情况下
The present invention is a dynamic test device for a bellows pulsating under both internal and external overpressure conditions. Bellows is one of the more mechanical parts that can be easily damaged. The basic data required to assess the failure characteristics are typically obtained by dynamic testing with varying stroke and at constant pressure and temperature. The tests carried out under constant pressure are given conservatively for the bellows. In order to obtain more accurate data on the reliability of the bellows, the pressure must be changed during a constant stroke to be tested. The bellows may sustain an external overpressure load due to pulsating loading (from 0 to 100% of maximum working pressure). Provided in this case