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控制或降低液压系统油液的污染度和提高液压元件的污染耐受能力是确保液压系统可靠工作的两个重要方面，本文分析了液压柱塞泵所在系统油液污染特性一定时影响泵污染耐受能力的诸多因素，指出了在结构形式确定的条件下设计高污染耐受度液压柱塞泵所要求的摩擦副材料与主要表面工艺。
Control or reduce the hydraulic system of oil pollution and improve the ability of hydraulic components to withstand contamination is to ensure the reliable operation of the hydraulic system are two important aspects of this paper analyzes the system where the hydraulic plunger pump oil contamination characteristics of a certain impact on pump resistance According to many factors of capability, the friction pair material and main surface technology required by the design of high pollution tolerance hydraulic piston pump under the condition of structural form are pointed out.