According to the direction of bearing load: sliding bearings can be divided into radial (to the heart) sliding bearings and axial thrust sliding bearings two types.
According to the type of lubricant: sliding bearings can be divided into oil-lubricated bearings, grease bearings, water-lubricated bearings, gas bearings, solid-lubricated bearings, magnetic fluid bearings and electromagnetic bearings 7 categories.
According to the lubrication film thickness: sliding bearings can be divided into film lubrication bearing and thick film lubrication bearing two categories.
According to the shaft material: sliding bearings can be divided into bronze bearings, cast iron bearings, plastic bearings, jewel bearings, powder metallurgy bearings, self-lubricating bearings and oil bearings, etc.
According to the structure of the shaft tile: sliding bearing can be divided into round bearing, elliptical bearing, three oil leaf bearing, stepped surface bearing, tiltable tile bearing and foil bearing, etc.
Sliding bearings, bearings that work under sliding friction. Sliding bearings work smoothly, reliably and without noise. Under the condition of liquid lubrication, the sliding surface is separated by lubricating oil without direct contact, which can also greatly reduce the friction loss and surface wear, and the oil film also has certain vibration absorption ability. But the starting friction resistance is large.
The part of the shaft supported by the bearing is called the journal, and the parts matched with the journal are called the shaft tile. In order to improve the frictional properties of the surface of the shaft tile and cast in its inner surface of the friction reducing material layer called bearing lining. Shaft shingles and bearing lining materials are collectively referred to as sliding bearing materials. Sliding bearing applications are generally in high-speed light load conditions.
Commonly used sliding bearing materials are bearing alloys (also known as Bachmann alloy or white alloy), wear-resistant cast iron, copper and aluminum-based alloys, powder metallurgical materials, plastics, rubber, hardwood and carbon-graphite, polytetrafluoroethylene (Teflon, PTFE), modified polyformaldehyde (POM), etc.
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