slide bearing-Plastic bearing-The working principle of the sliding bearings
Bearing workslidPlastic bearinge bearings can be divided into: rolling friction bearings (Rolling) and sliding friction bearing (sliding bearing)。
Plain bearings: sliding bearing surface if the formation of lubricating film on the surface of the deputy campaign separately， the sliding friction can be greatly reduced， as deputy campaign surface without direct contact and， therefore， to avoid the wear and tear。 Carrying capacity of sliding bearings， high precision turning， the lubricating film with shock， therefore， access to a wide range of applications in engineering。
The formation of the lubricating film is the basic conditions of the sliding bearing to normal work， lubrication factors affect the lubricating film formation， the relative velocity of the movement， vice， the physical properties of the lubricant and the surface roughness of deputy campaign。 Sliding bearings should be designed according to the bearing working conditions， to determine the type of bearing structure， select lubricants and lubrication methods and to determine the geometric parameters of the bearing
Sliding bearing the sliding bearing， the sliding friction bearings work。 Sliding bearing is stable，slide bearing reliable， no noise。 Conditions of liquid lubrication， sliding surface lubricant to separate without the risk of direct contact， but also can greatly reduce the friction loss and surface wear， the film also has a certain vibration absorption capacity。 But starting frictional resistance。 Axis of the bearing part is called a journal bearing journal to match the parts is called。 Cast on its inner surface in order to improve the friction properties of the bearing surface and anti-friction material layer is called the bearing liner。 Bearings and bearing liner materials are collectively referred to as the bearing material。 Commonly used bearing material bearing alloy (also known as babbitt or white metal)， cast iron， copper and aluminum alloys， powder metallurgy materials， plastics， rubber， hardwood and carbon - graphite， polytetrafluoroethylene (PTFE )， modified polyoxymethylene (POM)， and so on。
Sliding bearing applications is generally in the low-speed heavy duty conditions， or maintenance difficulties in the maintenance and filling oil operation site。