AN ARRANGEMENT FOR DIRECT SUPPLY OF PUMPED MEDIUM TO A TWIN-SCREW PUMP

摘要

An arrangement for a twin-screw pump (1) is disclosed, the pump comprising a pair of rotors (2, 3) having opposite pairs of intermeshing helical gears which are journalled and driven in rotation in a pump chamber defined by a rotor liner (4) provided with upper and lower feeding openings (8, 9) to the pump rotors, wherein upper and lower fluid supply chambers (6, 7) are each respectively provided as a fluid passage (6, 7) that opens laterally in the inner periphery of a centrally open ring-shaped flange (12, 13), the flange being connectable by its inner periphery to the rotor liner in position to establish direct flow communication between the fluid passage (6, 7) and the upper or lower feeding openings (8, 9), as the case may be, to the pump chamber.