Sliding bearings are generally used in low speed and heavy load conditions, or in the operation parts where it is difficult to maintain and add lubricating oil. The common sliding bearing materials are bearing alloy (also called Babbitt alloy or white alloy), wear-resistant cast iron, copper base and aluminum base alloy, powder metallurgy material, plastic, rubber, hardwood and carbon graphite, polytetrafluoroethylene (Teflon, PTFE), modified Polyoxymethylene (POM), etc.
So, how does the sliding bearing move when it works?
Sliding friction occurs when the sliding bearing works; the large rolling friction and the small sliding bearing mainly depend on the manufacturing accuracy; and the friction of the sliding bearing mainly depends on the material of the sliding surface of the bearing. The general working face of sliding bearing has self-lubricating function; sliding bearing is divided into non-metallic sliding bearing and metal sliding bearing according to material.
A bearing that works under sliding friction. The sliding bearing works stably, reliably and without noise. Under the lubrication condition of liquid self-lubricating bearing body, the sliding surface is separated by lubricating oil without direct contact, which can greatly reduce the friction loss and surface wear, and the oil film also has a 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 part matched with the journal is called the bearing bush. In order to improve the friction properties of the bearing surface, the antifriction material layer cast on the inner surface is called bearing liner. The materials of bearing bush and bearing liner are called sliding bearing materials. Sliding bearings are generally used in high speed and light load conditions.
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