| Contaminant control influencing on equipment life length in hydraulic and lubricant system
According to the research made by Dr. E Rabinowlcz from Massachusetts Institute of Technology, 70% of the damage in the hydraulic or lubricant equipment is caused by flaking or corrosion from the equipment surface; In this element, 20% comes from part surface corrosion. The other 50% comes from part or equipment wear off. Therefore if the oil cleanness is well controlled, it will effectively expand equipment life span.
Contaminant types in oil and lubricant
1. Solid contaminant: Metal grinding grain, dust contaminant etc.
2. Fluid contaminant: cooling water, condensate water, process water or process liquid etc
3. Other foreign contaminant: acid substances produced by oil degradation, carbon residue; resin formed by oil oxidation, oil mud etc
Source for contaminant in oil and lubricant
1. Contaminant produced by wear off of rotation parts or joint cup gap;
2. Erosion, impact or abrasion by adherence of Equipment valve operation.
3. Extension pole in moving cylinder brings grain or liquid contaminant while going through oil seal gap.
4. Iron debris was left in new machine installation or grained contaminant was left in pipe washing.
5. Unsuitable air breather brings contaminant
6. Contaminant was brought in while pouring new oil
7. Condensate water contaminant is produced by temperature decrease in oil groove.
8 .Water or grained contaminant is produced by leaking heat exchanger in water cooling.
Oil or lubricant degradation
1. Chemical change:
Regular oil is organic compound. It will easily produce oxygen ion while operated in air under high temperature and high speed rotation. However in this way it will bring chemical compound which is soluble in water, and then be formed into organic acid substance. Finally it will produce resins which cannot dissolve in water.
2. Contaminant reaction: solid substance and liquid contaminant will interreact and produce acid stuff , oxide, colloid, resin, oil mud or carbon laydown.
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