What are the lubrication methods for rolling bearings

The lubrication method of rolling bearings has an important impact on their performance, life and stability.

Oil lubrication:

Oil-Immersed Lubrication: In oil-immersed lubrication, the bearing is soaked in lubricating oil, and the internal lubrication of the bearing is maintained through soaking. This method is suitable for high-speed running bearings. Oil lubrication can effectively reduce friction and help cool the bearings.

Oil mist lubrication: Oil mist lubrication atomizes lubricating oil into tiny particles and then sprays it into the bearing to form a lubricating film. This method is suitable for high-speed and high-temperature environments and can effectively form a uniform lubricating film inside the bearing.

Grease lubrication:

Grease selection: Grease is a semi-fluid lubricant, usually composed of base oil and thickener. Grease is more suitable than lubricating oil for low-speed and high-load bearings. Grease selection needs to consider factors such as operating conditions, temperature range and load.

Filling amount: The control of grease filling amount is very critical. Too much filling can result in too much friction and heat, while too little filling can result in insufficient lubrication. Precise filling amount control helps form a proper lubricating film, improving bearing life and performance.

Formation of lubricating film:

Lubricating film thickness: The thickness of the lubricating film is directly related to the friction and wear of the bearing. Through appropriate lubricant selection and lubricating film formation, friction can be effectively reduced and bearing efficiency improved.

Uniform distribution: A uniformly distributed lubricating film can ensure that the entire bearing surface is effectively lubricated and prevent local overheating and wear. Therefore, lubricant selection and lubricating film formation need to be precisely controlled during the design phase.

Self-lubricating bearings:

Embedded Lubricant: Self-lubricating bearings often have a lubricant embedded in their structure, such as a solid lubricant or grease. When the bearing is running, these embedded lubricants will gradually be released to form a long-lasting lubricating film and reduce the friction of the bearing.

Other lubrication methods:

Liquid lubrication: In some special applications, liquid lubrication may also be used, such as in some high-speed and high-temperature environments.

Dry lubrication: Dry lubrication usually uses solid lubricants, such as solid coatings applied to the bearing surface, to reduce friction and improve wear resistance.