Lubrication requirements for sliding bearing systems
author: Leila
2025-05-09
Moderate viscosity
When lubricants are used under low temperature conditions, lubricant viscosity, lubricant viscosity index and pour point are important. According to lubrication theory, a proper oil film is the basis for establishing sufficient oil film thickness.
Oxidation stability
When lubricants are used continuously or intermittently for a long time, or when used under high temperature or other conditions that make lubricants prone to oxidation and deterioration, it is also very important for lubricants to have good oxidation stability and/or thermal stability.
Rust resistance
When there is steam or moisture at the work site, such as in the petrochemical, steel, papermaking and other industries, the machine will easily get damp and rust, and the lubricant needs to have good rust resistance.
Anti-foaming property
Sliding bearings are often lubricated by circulating oil or splash lubrication. When the lubricant is stirred or circulated in the oil system, some foam will naturally form due to mechanical movement. However, if there is too much foam, it may lead to insufficient oil supply to the bearing and cause the lubricant to overflow from the oil tank.
Oil-water separation (anti-emulsification)
If a large amount of water enters the lubricant, it is important that the lubricant can resist emulsification and easily separate the water.
Extreme pressure
In some cases of heavy load and low speed, it is difficult to maintain sufficient oil film thickness and keep the lubricant in a liquid state by viscosity alone. This makes the bearing easy to sinter. At this time, it is necessary to maintain oil supply and improve extreme pressure by adding oil additives.
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