流体机械

2013, v.41;No.498(12) 48-53

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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

王渭;杨善文;陈凤官;明友;郝伟沙;
WANG Wei;YANG Shan-wen;CHEN Feng-guan;MING You;HAO Wei-sha;Hefei General Machinery Research Institute;Anhui Provincial Laboratory for Safety Technology of Pressure Vessels and Pipelines;Sinopec Anqing Company;

摘要(Abstract):

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 analyzed,and it was pointed out that on-off characteristic led to the pump-outlet pressure violent change. In order to restrain amplitude 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 before,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(KeyWords): 水力除焦三通阀;阀芯;流量特性;泵出口压力
hydraulic decoking three-way valve;trim;flow characteristic;pump-outlet pressure

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作者(Authors): 王渭;杨善文;陈凤官;明友;郝伟沙;
WANG Wei;YANG Shan-wen;CHEN Feng-guan;MING You;HAO Wei-sha;Hefei General Machinery Research Institute;Anhui Provincial Laboratory for Safety Technology of Pressure Vessels and Pipelines;Sinopec Anqing Company;

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