Bearings – Rotary bearing – Antifriction bearing
Patent
1983-08-11
1985-09-17
Levy, Stuart S.
Bearings
Rotary bearing
Antifriction bearing
184622, 184 31, 384473, 384476, 384572, 384900, F16C 3700, F16C 3366
Patent
active
045417385
ABSTRACT:
A bearing assembly for supporting the spindle of a machine tool includes a single row tapered roller bearing and a closure at each end of the bearing for isolating the interior of the bearing from the surrounding atmosphere. A liquid refrigerant and lubricating oil are mixed in the closure at the small ends of the rollers, and are directed into the space between the tapered raceways. This refrigerant, upon encountering the tapered rollers, the raceways along which the rollers roll, and the thrust rib against which the large ends of the rollers bear, vaporizes and extracts heat from those bearing components, thereby enabling the bearing to operate at a generally uniform temperature close to room temperature. The vaporized refrigerant flows through a port in the closure at the large ends of the rollers and then into a heat exchanger where it is condensed, the liquid refrigerant being then directed to the closure at the small ends of the rollers. The lubricating oil is likewise recirculated from the closure at the large roller ends to the closure at the small roller ends where it is again mixed with the refrigerant. The refrigerant and oil may be mixed in an inwardly opening trough carried by the cage beyond the small roller ends and may be directed through channels in the cage bridges to the outer raceway and the thrust rib.
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Leibensperger Robert L.
Reed Karl W.
Levy Stuart S.
The Timken Company
Werner David
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