WELDED DOUBLE-SUCTION IMPELLER FOR CENTRIFUGAL PUMP Russian patent published in 2004 - IPC

FIELD: centrifugal parts. SUBSTANCE: proposed welded double-suction impeller includes drive disk and two cover disks with blades located in between them. Located over outer edges of blades are rectangular tenons whose length exceeds thickness of blades by 3-5 times at distance of multiple of 1-3 of tenon length. Cover disks have through holes over line of conjugation with blades where tenons are mounted forming clearances in width and length. On the external side of cover disks, chamfers are made over contour of holes for welded seams. Height of blade tenons exceeds thickness of cover disk walls by 1-2 mm+ADs- they form clearances of 0.1-0.15 mm. Chamfers made over contour of holes are equal to 0.3-0.5 of thickness of blades. EFFECT: low cost+ADs- enhanced efficiency and reliability of impeller due to improved quality of weld seams. 5 cl, 4 dwg