蓄能器式安全阀冲击试验压力梯度的分析

Analysis of Pressure Gradient in Accumulator Type Impact Test of Safety Valve

为了提高蓄能器式矿用安全阀的冲击压力安全性,对其在蓄能器式冲击试验下的压力梯度演化规律进行了研究,基于由蓄能器气体、加载缸液体和活塞组成的简化模型建立了微分方程,分别使用了数值求解、振动分析和AMESim仿真3种求解方法。对比了3种求解方法得出振动频率、振幅和压力梯度曲线,3种分析方法结果间的最大相对极值分别为1.895%、1.986%和1.740%,可以相互验证。同时,基于振动分析推导出了压力梯度预测函数。结果表明,3种方法可以对安全阀冲击压力安全性试验过程进行分析,压力梯度可以通过预测函数进行预测,其结果间的相对极值误差小于2%。

In order to improve the impact pressure safety of accumulator type mine safety valve,the pressure gradient evolution law of accumulator type mine safety valve under accumulator type impact test was studied.Based on the simplified model composed of accumulator gas,loading cylinder liquid and piston,the differential equation was established.Three solving methods,namely numerical solution,vibration analysis and AMESim simulation were used.Comparing the vibration frequency,amplitude and pressure gradient curves obtained by the three methods,the maximum relative extremum values of the three analysis methods were 1.895%,1.986%and 1.740%,which could be verified by each other.At the same time,the pressure gradient prediction function was derived based on the vibration analysis.The results showed that the three methods could be used to analyze the safety test process of the safety valve impact pressure,and the pressure gradient could be predicted by the prediction function,and the relative extreme value error between the results was less than 2%.