Bearings – Rotary bearing – Water lubricated propellor shaft or well shaft
Patent
1997-06-17
1999-03-30
Hannon, Thomas R.
Bearings
Rotary bearing
Water lubricated propellor shaft or well shaft
384247, 384276, 384295, 384315, F16C 300, F16C 2302, F16C 3366
Patent
active
058879820
ABSTRACT:
The present bearing assembly is for use with a wastewater treatment apparatus which is driven by a drive shaft, e.g., cog rake bar screens, or water treatment apparatus, e.g., paddle wheels in flocculation mixing tanks, and submerged, partially submerged or intermittently submerged in a fluid environment. The bearing assembly includes a tubular member keyed against rotation in a bearing housing with the tubular member bore surfaces engaged against the drive shaft surfaces without rolling elements disposed therebetween thus eliminating the need for lubricators to supply the bearings with grease. Accordingly, the present dry bearing assembly is not subject to failures caused by having the grease in the bearings flushed out by wastewater flows or by submerging of the lubricator. In addition, the keyed connection provided between the housing and bearing member allows the bearing member to be slid out from the housing and rotated so as to present a different section of the load bearing surface below the slowly rotating horizontal shaft for taking the downward loads thereof providing an easy method of performing maintenance on the bearing assembly. Clearances provided between the housing and bearing member facilitate this sliding of the bearing member out from the housing, provide flow paths to allow wastewater to flow out from the bearing assembly, and allow for the bearing member when made from a plastic material to expand radially when exposed to varying temperature wastewater environments. An alternative split construction pillow block bearing assembly is disclosed which allows the bearing member inner surfaces to be observed for any wear and to provide an indication of the level of wear on the primary load bearing surface of the lower half of the bearing member.
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Hannon Thomas R.
U.S. Filter Wastewater Group, Inc.
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