Bearing for conveyor roller bearing for conveyor clearance; refers to the roller without the device in the shaft or bearing box; the inner ring or outer ring of a fixed; do radial or axial move of the moving amount then is not fixed one. According to moving direction; can be divided into radial and axial clearance gap travel.
When the clearance operation (called operation clearance) the size of bearing fatigue life and temperature affect the roll up, noise and oscillations.
Measuring the clearance of bearings; in order to obtain a steady measuring value, the regular load of the bearing is usually applied
Therefore, the measured value is larger than the actual clearance (called theoretical clearance); that is to say, the elastic deformation quantity of the measurement load is increased
But for the roller bearing, because of the elastic deformation, the internal clearance of the bearing for conveyor roller before the device is usually indicated by theoretical clearance
Bearing for conveyor roller clearance selection
From the theoretical clearance minus the bearing device on the shaft or inside the shell, due to the interference of the ring of the expansion of the large or shortened clearance is called "device clearance"
The clearance which is caused by the internal temperature difference in the bearing is added and added to the clearance of the device, called the "useful clearance"
The bearing device has the mechanical clearance of the necessary load when it is placed; that is, the useful clearance and the elastic deformation after the bearing load are called "operation clearance"
When the work gap is negative when the micro bearing for conveyor roller; the fatigue life is the longest but with the increase of fatigue life with negative clearance decreased significantly. Therefore; bearing clearance selection; usually the working clearance is zero or slightly positive is appropriate.