Patent ID: 8075281
Filing Date: 2011-12-13
Classification: B01D,C02F,F04F

Abstract:
1. A pressure transfer device for transferring pressure energy from a high pressure first liquid to a lower pressure second liquid to provide a pressurized second liquid, which device comprises: a rotatably mounted cylindrical rotor having a pair of opposite planar end faces with a plurality of channels extending axially therethrough between openings located in said planar end faces; and a pair of opposite end covers having axially inward and outward end surfaces, with said axially inward end surfaces of each having flat regions that interface with and slidingly and sealingly engage said respective planar end faces of said rotor, each said end cover having two or more inlet passageways and two or more discharge passageways which at least four passageways open into said axially inward end surfaces, said end covers being aligned so that when one said channel in said rotor is aligned with an inlet passageway opening in one said end cover, it is also aligned with a discharge passageway opening of substantially the same size in said opposite end cover, said inlet passageway openings and said discharge passageway openings in said same end cover being constantly sealed from one another during the operation by a sealing region at an interface between said rotor planar end face and said end cover inward end surface, whereby, at least twice during each revolution of said rotor, said rotor channel openings are, in alternating sequence, brought into full alignment with both one of said inlet passageway openings in one said end cover and one of said discharge passageway openings in the opposite said end cover and then into full alignment with both one of said discharge passageway openings in said one end cover and one of said inlet passageway openings in said opposite end cover, so that each said rotor channel is at least twice during each revolution supplied with the high pressure first liquid and at least twice discharges pressurized second liquid.