The rolling element is the core element in the rolling bearing. Due to its existence, there is rolling friction between the relative moving surfaces. The types of rolling elements include balls, cylindrical rollers, tapered rollers, needle rollers, etc. The rolling elements of rolling bearings mainly include steel balls and rollers.
Basic structure of rolling bearings
Rolling bearings developed on the basis of sliding bearings, whose working principle is to replace sliding friction with rolling friction, generally consist of two rings, a set of rolling elements and a cage; it is highly versatile, standardized and serialized Very tall mechanical base pieces. Due to the different working conditions of various machines, various requirements are put forward for rolling bearings in terms of load capacity, structure and performance. For this reason, rolling bearings require various structures. However, the most basic structure is composed of inner ring, outer ring, rolling elements and cage.
The role of parts in bearingsFor radial bearings, the inner ring usually fits tightly with the shaft and runs together with the shaft, and the outer ring usually forms a transition fit withthe bearing housing or the mechanical housing hole to play a supporting role. However, in some occasions, the outer ring is also running, and the innerring is fixed to act as a support, or both the inner ring and the outer ring are running at the same time.For thrust bearings, it is called the shaft ring that fits tightly with the shaft and moves together, and it is called the seat ring that is in transition fitwith the bearing seat or the hole of the mechanical housing and plays a supporting role.Rolling elements (steel balls, rollers or needle rollers) are usually evenly arranged between two rings by means of cages in the bearing for rollingmotion. Its shape, size and quantity directly affect the load capacity and performance of the bearing.In addition to separating the rolling elements evenly, the cage can also play a role in guiding the rotationof the rolling elements and improving the internal lubrication performance of the bearing.
