JZ21系列压力机专用气压式过载保护系统原理

The Principle of the Overload-Protective System Applied in Series JZ21 Barometric Press

根据JZ21系列机械压力机过载保护的工况要求，介绍了一种以气动油泵和安全保护阀为核心的气压式过载保护系统．

Based on the overload-protective working demands of series JZ21 Baromectric Press,the paper introduces a overload-protective system of Barometric Press,the core of which is pneumatic pump and safety protective valve.