The difference between sliding bearing and motor rolling bearing

Motor bearing types are divided into: rolling bearings, sliding bearings. Today, I will briefly introduce the difference between sliding bearings and motor rolling bearings.

　　 Sliding bearing has the advantages of long service life, large shaft diameter and rotation speed. Compared with rolling bearings, small size plain bearing bearings are more expensive.

The lubrication methods of sliding bearings are divided into self-lubrication and forced lubrication. According to the general selection principle, self-lubrication can be used without forced lubrication. If the main engine has a shared oil station, it is better to choose forced lubrication, but there are complicated and complicated oil pipe arrangements. The possibility of oil leakage.

Generally for 2-pole motors, self-lubricating is used for motors below 1000kW; forced lubrication and lubricating oil are used for motors above 1000kW. The lubricating oil is L-TSA32# turbine oil.

　　 For motors with 4 poles and above, self-lubrication is used for motors below 2000KW, and forced lubrication is used for motors above 2000KW. The lubricating oil is L-TSA46# turbine oil.

　　The selection range of rolling bearings is 63~710 with center height; For motors with center height above 710mm, sliding bearings should be selected due to the heavy weight of the rotor. Due to the limitation of the volume of sliding bearings, sliding bearings should not be used for motors with a center height below 450.

　　Rolling bearings are standard parts, which have the advantages of convenient use and maintenance, interchangeability, multiple supply channels, and low prices for small sizes. However, large-size bearings are limited by limited speed and small usage, and the price is relatively high.

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