| 摘要 |
FIELD: mechanical engineering; fans and air cleaners. ^ SUBSTANCE: proposed centrifugal fan contains fan plate in form of disk and great number of blades arranged square to plate over edge at constant pitch. When diameter of inscribed circumference which connects inner ends of blades is equal to Di and diameter of described circumference which connects outer of blades is equal to Do, ratio between inner diameter and outer diameter Di/Do is equal to 0.76±0.3, curved line of blade has double arcs of circumference, outlet angle of blades is equal to 165°±10° and number of blades is from 41 to 49. ^ EFFECT: provision of adequate blowing out, reduced noise of centrifugal fan, improved in use. ^ 16 cl, 8 dwg |
