| 摘要 |
The bearing arrangement is suitable in particular for the mounting of molds for the production of plastic pipes by the centrifugal molding process. It has a ball bearing whose inner bearing ring (5) sits on the pipe (3) which is to be freely rotatably mounted and whose outer bearing ring (7) is held in a support ring (13). Covering rings, one (17, 19) of which on each bearing side is coordinated with the inner (5) bearing ring and one (11, 12) with the outer (7) bearing ring, serve for protection from water and humidity. These covering rings (17, 18, 11, 12) are such that, in pairs, they form a labyrinth seal. The covering rings (11) coordinated with the outer, i.e. the fixed, bearing ring (7) are provided with an injection nozzle (31) for lubricating oil and compressed air and with an outflow orifice (22) for water which has entered and a discharge orifice (36) for the lubricating oil. It is therefore possible to prevent the penetration of splashes, continuously to lubricate the bearing and to generate in the bearing a positive pressure which prevents air or water from being sucked in by heating or cooling with water. |
