Reciprocating fluid pumps with chromium nitride coated components in contact with non-metallic packing and gasket materials for increased seal life
    7.
    发明授权
    Reciprocating fluid pumps with chromium nitride coated components in contact with non-metallic packing and gasket materials for increased seal life 失效
    往复式流体泵与氮化铬涂层组件接触非金属填料和衬垫材料,增加密封寿命

    公开(公告)号:US06212997B1

    公开(公告)日:2001-04-10

    申请号:US09243517

    申请日:1999-02-01

    Abstract: Chromium nitride coating of machine components such as reciprocating pump plungers for continuous sliding contact with non-metallic packing and gasket materials greatly increases the performance life of fluid seals. In an air driven reciprocating constant pressure pump, exterior surfaces of the pump plunger are coated with chromium nitride to a thickness of seven to ten microns. The coating resists failure from repeated sliding contact against non-metallic packing and gasket materials for at least four million pump cycles, with no evidence of cracking or release of metallic particles which would embed in the packing or gasket material and score the plunger. In lower pressure pumps, interior walls of a housing against which a sliding gasket bears, when coated with chromium nitride, greatly increase the seal life of the sliding gasket.

    Abstract translation: 用于与非金属填料和衬垫材料连续滑动接触的往复式泵柱塞等机械部件的氮化铬涂层大大增加了流体密封件的使用寿命。 在空气驱动的往复式恒压泵中,泵柱塞的外表面涂覆有氮化铬,厚度为7至10微米。 该涂层可抵抗非金属填料和垫片材料反复滑动接触至少四百万泵循环的故障,没有任何迹象表明会嵌入填料或垫圈材料中的金属颗粒的破裂或释放,并使柱塞得分。 在低压泵中,当涂覆有氮化铬时,滑动垫圈承受的外壳的内壁大大增加了滑动垫圈的密封寿命。

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