水力除焦三通阀阀芯改造对水泵出口压力的影响  

Effect of Trim Modification of Hydraulic Decoking Three-way Valve on the Pump-outlet Pressure

作　　者：王渭[1,2] 杨善文 陈凤官[1,2] 明友[1,2] 郝伟沙[1,2] 

机构地区：[1]合肥通用机械研究院,安徽合肥230031 [2]安徽压力容器与管道安全技术省级实验室,安徽合肥230031 [3]中国石油化工股份有限公司安庆分公司,安徽安庆246002

出　　处：《流体机械》2013年第12期48-53,共6页Fluid Machinery

摘　　要：分析了水力除焦工艺过程中,快开型水力除焦三通阀的启闭对水泵出口压力的影响,指出该型除焦三通阀的快开流量特性导致泵出口压力的大幅度变化,对频繁启动的高压离心泵不利。为抑制水泵出口压力的变化幅度,对原三通阀的阀芯进行改造,使阀门流量特性类似线性。三通阀改造后,在水力除焦工艺的启泵、充水阶段,预测泵出口压力变化幅度较阀芯改造前下降74.8%,而泵出口压力实际变化幅度较阀芯改造前下降了82.68%,与预测的阀芯改造对水泵出口压力变化幅度的抑制程度基本一致。The effect of travel of on-off characteristic of hydraulic decoking three-way valve on the pump-outlet pressure was an- alyzed, and it was pointed out that on-off characteristic led to the pump-outlet pressure violent change. In order to restrain ampli- tude of pump-outlet pressure variation, on-off trim was changed to get linear-characteristic. It was forecasted that amplitude of pump-outlet pressure variation will fall by up to 74.8% compared with the rangeability caused by the travel of trim changed be- fore,and the real amplitude of pump-outlet pressure variation fell by up to 82.68% which is in accord with the predicted value.

关 键 词：水力除焦三通阀 阀芯 流量特性 泵出口压力 

分 类 号：TH138[机械工程—机械制造及自动化]