RADIAL IMPELLER, ELECTRIC BLOWER AND VACUUM CLEANER

• Main Authors: ADACHI NAHO, KATO YASUAKI
• Format: Patent
• Language: English; Japanese
• Published: 27.10.2014
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a high efficiency radial impeller capable of reducing a loss of an inlet part by equalizing an airflow quantity distribution at the inlet of a moving blade.SOLUTION: A radial impeller 11 comprises: a hub 23; a shroud 24 provided to face the hub; and a plurality of moving blades 25 provided between the hub and the shroud. An axial height of each rear edge 27 of the moving blades is the half of the axial height of each leading-edge 26; in a region from each leading-edge of the moving blades to an intermediate position of the cord length of the moving blades, the region on the shroud side from an intermediate height is tilted in a direction of rotation; each leading-edge of the moving blades is tilted to separate from each rear edge as the leading-edge comes closer to the shroud side from the intermediate height; and an inlet installation angle of the leading-edge of the region, which is tilted in a direction of rotation of each of the moving blades, is smaller than the inlet installation angle of the leading-edge on the hub side from the intermediate height. 【課題】動翼入口の風量分布を均一化し、入口部の損失を低下させることができる、高効率な遠心羽根車等の提供。【解決手段】遠心羽根車１１は、ハブ２３と、ハブと対向するように設けられたシュラウド２４と、ハブ及びシュラウドの間に設けられた複数の動翼２５とを備え、動翼それぞれの後縁２７の軸方向高さは、前縁２６の軸方向高さの半分であり、動翼それぞれの前縁から、動翼の翼弦長の中間位置までの領域であって、中間高さよりもシュラウド側の領域は、回転方向に傾けられており、動翼それぞれの前縁は、中間高さよりもシュラウド側に近づくにつれ、後縁から離れるように傾けられており、それぞれの動翼における回転方向に傾けられている上記領域の、前縁の入口設置角は、中間高さよりもハブ側の、前縁の入口設置角よりも小さい。【選択図】図４