What's the difference between plain bearings and oilless bearings?
Compared with plain bearings, the advantages of rolling bearings:1, the general condition, the rolling efficiency and hydrodynamic bearing lubrication bearing, but higher than the mixed lubrication bearing; 2 radial clearance is relatively small, the centripetal angular contact bearing preload available available pretightening force to eliminate the clearance, operation and high precision; 3, for the same size of the shaft diameter, bearing width ratio the sliding bearing is small, the axial structure of machine is compact; 4, most of the rolling bearing can be both radial and axial load, the bearing assembly has the advantages of simple structure, less consumption of lubricants;
5, easy sealing, easy maintenance; 6, do not need useful non-ferrous metals; 7, high degree of standardization, mass production, low cost.Compared with plain bearings, the disadvantages of rolling bearings:1, the ability to withstand shock loading is poor; 2, high speed and heavy load bearing life is low; 3, vibration and noise is larger; 4, radial size than sliding bearings.
The sliding bearing has the following characteristics: 1, long service life, suitable for high speed; 2, can withstand the shock and vibration load; 3, high running precision, work balance, no noise; 4, simple structure, convenient assembly and disassembly; 5, large carrying capacity, can be used for heavy-duty; 6, non friction sliding friction bearing liquid. Loss of fluid friction; sliding bearing, rolling bearing friction loss and not much difference, but the design and manufacture of lubrication and maintenance requirements of high.
