Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1996-12-19
1998-10-27
Look, Edward K.
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415180, 415231, 277 65, 277 81R, F04D 2910
Patent
active
058270426
ABSTRACT:
For fitment into the stuffing box of a centrifugal pump. A spiral-groove is cut on the outer surface of the rotor of a pair of tapered bearing surfaces. The groove is 0.02 mm deep, 2 mm wide, and its circumferential length is 50 cm. Barrier-liquid is fed to an entry-mouth of the spiral-groove, and groove generates a pressure in the stuffing box high enough to overcome process pressure. The barrier-liquid may be water. The interface between the bearing surfaces is sealed from the process-fluid and from the outside.
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Muijderman, "Analysis And Design of Spiral Groove Bearings," Journal of Lubrication Technology, Jul. 1967.
Stair, "Effect Of Groove Geometry On Viscoseal Performance," Journal of Engineering for Power, Oct. 1967.
McGrew et al, "Analysis And Test Of The Screw Seal In Caminar and Turbulent Operation," Journal of Basic Engineering, Mar. 1995.
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A. W. Chesterton Co.
Look Edward K.
Woo Richard
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