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US 4,363,490 AGranted
Crown roll seal arrangement sealed by lubricating oil in labyrinth
AssigneeUSM Corporation
InventorHoward E. Kuehn
Life of this patent
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Abstract
A non-contact seal for the ends of a variable crown calender roll shaft subject to variations in shaft alignment. The seal is a labyrinthian type with a suction system adapted to a sump to recycle the oil. The oil level is maintained and contact between the rotating shaft and the labyrinthian seal is avoided, permitting higher temperature and higher speed use of the roll apparatus.
Claims5
A seal arrangement for a calender roll comprising:
- a stationary roll shaft;
- a roll shell rotatively journalled in a bearing at each end about said roll shaft;
- a fluid passageway for permitting said bearings to receive lubricating fluid from a lubricating chamber;
- a labyrinthian non-contact seal arranged on the outer side of said bearings on said shaft between said shaft and said roll shell;
- and
- a fluid discharge system for maintaining a predetermined level of lubricating fluid about said bearings in said chamber and preventing passage of excess fluid through said labyrinthian seal.
3 more elements
Dependencies are inferred from the claim text.