Bearing angular contact symmetrical arrangement
The fixed fulcrum in the figure Bearing below is symmetrically arranged with two angular contact bearings, which respectively bear the axial force in the left and right directions and jointly bear the radial force. It is suitable for occasions with large axial load. In order to facilitate assembly and adjustment, the fixed fulcrum adopts the cup structure. At this time, when selecting the size of the floating fulcrum bearing, generally make the outer diameter of the bearing equal to the outer diameter of the cup, so as to facilitate the processing of the two bearing seat holes.
When the two fulcrums are designed as floating supports, 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 fulcrum must be designed as floating support, but the shafting components of 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 increases gradually, which will lead to the adverse working condition of shortening the service life of the main shaft.
