Rotary kinetic fluid motors or pumps – Axially opposed working fluid paths to or from runner – Pump impeller means
Patent
1992-10-13
1993-12-07
Look, Edward K.
Rotary kinetic fluid motors or pumps
Axially opposed working fluid paths to or from runner
Pump impeller means
415102, 415143, 37195, 37320, 37329, 37337, F01D 302
Patent
active
052678300
ABSTRACT:
A pump for handling abrasive materials includes a housing having two chambers. A shaft mounts a high pressure impeller and a high volume impeller in respective chambers of the housing, each chamber having a separate and opposite inlet. A channel is provided to divert a portion of the flow generated by the high pressure impeller to a purge ring adjacent the primary inlet corresponding to the high volume impeller. The purge ring directs a flow of relatively abrasive-free liquid toward the inlet to reduce wear on the housing and high-volume impeller. Another part of the flow from the high pressure impeller is diverted through the housing to isolate portions of the housing and the high volume impeller from the abrasive material laden intake through the primary inlet. The invention also includes a method of dredging abrasive materials which includes immersing a pump into a liquid in proximity to a deposit of abrasive materials, directing a first flow of liquid containing abrasive materials into a primary inlet of the pump and directing a second, relatively abrasive-free flow of liquid into a secondary inlet, circulating a portion of the abrasive-free flow toward the intake, and combining the first and second flows in the pump before discharging the combined flow to a remote location.
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Dellinger Ronald L.
Gardner Lawrence R.
Klote Lawrence E.
Pennington Troy L.
Wickoren Dean R.
Innovative Material Systems, Inc.
Larson James A.
Look Edward K.
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