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Analysis of Retaining Ring Leakage During Equipment Operation

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Analysis of Retaining Ring Leakage During Equipment Operation

date:[2022-09-08]     pk_hits:
泵用機(jī)械擋圈經(jīng)過靜試后,運(yùn)轉(zhuǎn)時高速旋轉(zhuǎn)產(chǎn)生的離心力,會避免介質(zhì)的泄漏。因此,運(yùn)轉(zhuǎn)時機(jī)械擋圈泄漏在排除軸間及端蓋密封失效后,基本上都是由于動、靜環(huán)摩擦副受到破壞所引起的密封失效;

引起摩擦副密封失效的因素:
1、操作中,因抽空、氣蝕、憋壓等異常現(xiàn)象,引起較大的軸向力,使動、靜環(huán)接觸面分離;
2、安裝機(jī)械擋圈時壓縮量過大,導(dǎo)致摩擦副端面嚴(yán)重磨損、擦傷;
3、動環(huán)擋圈過緊,彈簧無法調(diào)整動環(huán)的軸向浮動量;
4、靜環(huán)擋圈過松,當(dāng)動環(huán)軸向浮動時,靜環(huán)脫離靜環(huán)座;
5、工作介質(zhì)中有顆粒狀物質(zhì),運(yùn)轉(zhuǎn)中進(jìn)入摩擦副,損傷動、靜環(huán)密封端面;
6、設(shè)計(jì)選型有誤,密封端面比壓偏低或密封材料冷縮性較大等;
上述的情況在試運(yùn)轉(zhuǎn)中經(jīng)常出現(xiàn),有時候可以通過適當(dāng)調(diào)整靜環(huán)座等予以,但多數(shù)需要重新拆裝,更換密封件;
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