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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Reciprocating plunger pump is a kind of major equipment for oil production in oilfield, and its technique function directly influences the normal safe operating of oil unit.

往复式柱塞泵设备是油田采油单位的主要生产 设备，其技术性能的好坏直接影响到采油单位安全生 产的正常运行。

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The shortcoming of top valve housing for standard type oil well pump plunger is wear and rupture of oil flow pore wall.

标准型抽油泵柱塞上阀罩的工作缺陷是出油孔壁磨损断裂。

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