Rotary expansible chamber devices – Shaft or trunnion lubrication or sealing by diverted working...
Patent
1995-11-20
1997-06-24
Vrablik, John J.
Rotary expansible chamber devices
Shaft or trunnion lubrication or sealing by diverted working...
418131, 4182067, F04C 218
Patent
active
056412819
ABSTRACT:
An improved self-lubricating bearing arrangement for gear pumps utilizes a system of material feed channels and reservoir pockets to divert a portion of the material being pumped from the pressure side of the intermeshing gears to lubricate the gear-supporting shafts within the bearing arrangement. At each gear shaft, a linear material feed channel is formed in the radial face of the bearing between a pressure relief recess and an axial opening supporting the shaft and a parabolic reservoir pocket is formed within the bearing opening adjacent the shaft to apply diverted polymer to the shaft. Each material feed channel and reservoir pocket is polished to a mirror finish to minimize any tendency of suspended additives in the polymer from adhering to or collecting within the channels or pockets, thereby to prevent unusual or localized wearing of the gear shafts.
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Russell Charles R.
Williams Fernie E.
LCI Corporation
Vrablik John J.
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