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液壓油的換油指標

发表时间：2019-01-08 10:03

　　在大多數情況下，液壓油可使用多年。但是，其他油品的混入，以及外界塵土、金屬碎末、鏽蝕粒子和水的汙染等，都可以急劇的降低液壓油的使用壽命。液壓裝置不同，其汙染度的等級要求也不同。

1. HL液压油的换油标准

? ? ?SH/T0476-1992《L-HL液壓油換油指標》规定，我国HL液壓油的換油指標见下表，当使用中的油品有一项达到換油指標时，即应更换新油。

L-HL液壓油換油指標

項目

換油指標

試驗方法

外觀

不透明或渾濁

目測

40°C運動粘度變化率（%）

>±10

GB11181-2003

色度變化（比新油，號）

≥3

GB/T6540-1986

酸值（mgKOH/g）

>0.3

GB/T264-1983

水分（%）

>0.1

GB/T260-1977

機械雜質（%）

>0.1

GB/T511-1988

銅片腐蝕（100°C，3h級）

≥2

GB/T5096-1985

2. HM液压油換油指標

? ?SH/T0599-1994《L-HM液压油換油指標》规定，我国HM液壓油的換油指標，见下表，使用中的HM液压油

有一项达到換油指標时应更换新油。

L-HM液压油換油指標

項目

換油指標

試驗方法

40°C運動粘度變化率（%）

>+15或>-10

GB/T265-1988及GB11181-2003

色度增加（比新油，號）

≥2

GB/T6540-1986

酸值（降低%）

酸值增加值（mgKOH/g）

>35

GB/T264-1983或GB11181-2003

>0.4

水分（%）

>0.1

GB/T260-1977

正戊烷不溶物（%）

>0.10

GB/T8926-1988A法

銅片腐蝕（100°C，3h，級）

≥2a

GB/T5096-1985

上一篇影響油品體積電阻率的因素？

下一篇抗磨液壓油的組成

文章分類：技術知識

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