The role of shaft sleeve: 1, reduce the wear of shaft and seat; 2, fixed position; 3, bearing slip; 4, heat dissipation; 5, reduce friction. The shaft sleeve is a cylindrical mechanical part set on the rotating shaft, which is a component of the sliding bearing. In general, interference fit is used for the bushing and the bearing seat, and clearance fit is used for the shaft.

 

Bushing refers to the sleeve on propeller shaft or stern shaft. And the bearing is fixed in the mechanical transmission process and reduce the load friction coefficient of the components. The bushing and the bearing have in common that both bear the load of the shaft. The difference between the two is that the shaft sleeve is an integral structure, rotation is the relative movement between the shaft and the shaft sleeve; The bearing is split, and the inner and outer rings of the bearing itself move relatively when rotating. But in essence, the sleeve is actually a kind of sliding bearing. The bearing bush is equivalent to the outer ring of the sliding bearing, the bushing is integral, and the relative axis is moving, and the bearing bush is pieced, the relative axis is rotating.

 

The composition of the shaft sleeve: 1, journal: the part of the shaft supported by the bearing; 2, bearing bush: matching parts with the journal; 3, sleeve: make the whole cylindrical sleeve.