| 摘要 |
The bearings (18) fit into the ends of hollow sleeve bodies to define the rollers of the conveyor. The bearings (18) are designed to prevent the ingress of water through the bearings into the interior of the sleeve bodies, because collection of liquid in these bodies in unhygienic in food factory applications. The bearings (18) are designed to act as water seals by on the one hand the design of labyrinth seals between the inner and outer races (24, 26) of the bearings in that the labyrinth gaps (X, Y) are designed to allow outflow of liquid from the bearings, and on the other hand, when stub shaft axes are used, blanking plates to the inside of the sleeve body. The clearances are not made so large as to allow excessive inflow of liquid into the bearing. The labyrinth seal therefore acts in two ways. It limits inflow of liquid into the bearing and also allows outflow of that liquid from the bearing to prevent accumulation of liquid in the bearing. Also, the stub shaft axes, when provided, are spring loaded outwardly and in accordance with another feature, the axle or axles is or are sealed to the bearings by O-rings (44) so that the bearings are movable axially of the axle or axles without loss of sealing. |
