What are the advantages of rolling bearings and plain bearings
Rolling bearings are easy to use and maintain, work reliably, have good starting performance, and have high bearing capacity at moderate speeds. Compared with sliding bearings, rolling bearings have larger radial dimensions, poorer vibration damping ability, lower lifespan at high speeds, and louder noises. The radial bearing in rolling bearing (mainly bearing radial force) usually consists of four parts: inner ring, outer ring, rolling body and rolling body cage. The inner ring is tightly sleeved on the journal and rotates with the shaft, and the outer ring is installed in the bearing seat hole.
The difference between rolling bearings and sliding bearings is first of all in the structure. Rolling bearings rely on the rotation of rolling elements to support the rotating shaft, so the contact part is a point. The more rolling elements, the more contact points. Sliding bearings rely on smooth surfaces. to support the rotating shaft, so the contact part is a face. Secondly, the movement mode is different. The movement mode of the rolling bearing is rolling; the movement mode of the sliding bearing is sliding, so the friction situation is completely different.