Imported bearing maintenance needs to deal with the cause of damage

The dovetail guide noise of imported bearings and control measures. The raceway noise is a kind of slippery and continuous sound emitted by the non-standard bearing when the rolling body turns over on the dovetail guide surface when the single-sided bearing is running. It is a unique basic sound that all rolling bearings will produce. The general imported bearing sound is the dovetail guide sound plus other sounds.

The noise of the ball bearing dovetail guide is irregular, with a frequency above 1000Hz. Its main frequency does not change with the speed ratio, but its total noise coefficient increases with the increase of the speed ratio. For bearings with high raceway noise, the noise coefficient of the raceway noise decreases with the increase of viscosity, but when the viscosity of the bearing with low raceway noise increases to more than 20mm^2/s, the noise coefficient changes from decreasing to increasing to a certain extent. The greater the stiffness of the seated bearing, the smaller the total noise coefficient.

When the axial side clearance is too small, the total noise coefficient and main frequency of the drum sound increase greatly with the decrease of the axial side clearance. The way to control the roller sound is to use low-noise imported bearings, that is, small corrugated bearings, and carefully select the application standard. Rolling noise often affects the noise of the entire machine and equipment. Reducing the noise of the dovetail guide can reduce the noise of the entire machine and equipment.

The impact noise of the rolling body and its control measures When large-sized ball bearings or cylindrical roller bearings run at low speed under pure axial load, due to the small centripetal force of the rolling body, the rolling body in the non-load area will hit the ball bearing or dovetail guide and transmit noise. However, as the speed ratio increases, this noise will disappear. The control measures for the impact noise of the rolling body are to appropriately reduce the axial side clearance, use effective structures, and use imported bearings with smooth ball bearings as the raw materials.