In this paper, the failure mechanism of plunger seals for injection pump used in oil field is investigated and the features of existing reciprocating seal structures are evaluated.

对大功率油田注水柱塞泵柱塞密封的失效机理进行了论述，分析了现有几种典型的密封结构。

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A forced-closing-and-opening plunger pump is developed to solve the problems of gas lock and sand inflow and low pump efficiency in steam injection Wells.

针对辽河油田蒸汽吞吐油井存在气锁、出砂、后期油稠泵效降低的状况，研制了强启闭柱塞抽油泵。

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The effects of the wear of plunger pair on delivery fuel characteristic of fuel injection pump is investigated.

通过实验得出了柱塞偶件磨损对喷油泵供油特性的影响规律。

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