落锤对立柱与安全阀系统冲击的计算

CALCULATION OF DROP HAMMER IMPACT TO LEG AND SAFETY VALVE

通过对具有不同伸出长度的立柱、安全阀系统作不同荷重、不同落体高度的落锤冲击计算，并进行分析、比较，得出：冲击引起液体压力升高某瞬间，立柱上、下端液体压差达７ＭＰａ，抗冲击安全阀应置立柱上端；立柱容纳液体越多越好；尽可能将活柱制成无活塞筒状；安全阀阀芯受液压作用面积应尽可能大，以提高其动态响应能力等重要结论．

Drop hammer impact calculation was conducted to legs of different length and safety valves with various loads and falling heights, and based on analyzing and comparing, it was obtained that: in the moment of hydraulic pressure increasing caused by impact, the pressure difference of liquid reached to 7MPa, impact resistance safety valve should fixed on top of leg; the more liquid contained in leg, the better;the cylinder type leg without piston should be made as for as possible; the spool area of safety valve should be as bigger as possible to increase dynamic response capability.