Measures for the location of bearing components
When the two fulcrums are designed as floating support, Bearing the position of shafting components must be positioned by other measures. For example, the position of the shafting components supporting the herringbone gear can be determined by the geometry of the herringbone gear. At this time, the two fulcrums need to be designed as floating support, but the shafting components where the herringbone gear (above the figure) used to mesh with it must be fixed at both ends, so that both shafts can be axially positioned.
Points for attention in group configuration of angular contact ball bearings
Any arrangement using bearing face-to-face (DF) installation is not recommended because it has the lowest stiffness. In addition, when the operating speed is relatively high, such installation will increase the bearing preload due to the temperature difference between the bearing seat, bearing and shaft. With the increase of this temperature gradient, the preload of the bearing gradually increases, which will lead to the adverse working condition of shortening the service life of the main shaft.
In the installation of the main shaft, the temperature of the shaft usually changes faster than Bearing that of the bearing seat, forming a temperature difference between the two parts. This is due to their different quality and heat dissipation capacity. Therefore, the shaft and inner ring spacer expand faster than the bearing pedestal and outer ring spacer. With the axial expansion of the shaft and the elongation of the inner ring spacer, the axial load on each bearing increases and continues to increase until the thermal balance is reached. When the heat transferred by the bearing is balanced with the heat generated by the system, the temperature of the bearing seat can be stable. Therefore, if the temperature of the bearing seat is too high, the temperature of the bearing is also very high.
