| 摘要 |
FIELD: designs of centrifugal pumps. ^ SUBSTANCE: welded impeller of centrifugal pump includes driving and covering discs between which blades are arranged. Along outer edges of blades there are spines whose length exceeds by 3 - 5 times thickness value of blades. Said spines are spaced one form another by distance multiple to 1 -1.3 length values of them. Driving and covering discs have through openings in which blade spines are arranged with gaps along width and along length. At outer side of discs along contour openings are chamfered for welded seams. Spines of blades are rectangular, their height exceeds by 1 - 2 mm thickness of disc wall and they are arranged in openings with gaps 0.1 - 0.15 along width and along length. Chamfers along contour of openings consist 0.3 - 0.5 of blade thickness value. Spines of blades assembled with discs are welded around by means of electric arc welding. Inlet portion of blade is tapered along radiuses of cone generatrix. ^ EFFECT: small-cost effective pump impeller, possibly with increased maximum diameter. ^ 4 cl, 4 dwg |
