| 摘要 |
PURPOSE: An impeller blade and an impeller equipped with the same are provided to reduce fluid resistance force on a root portion, thereby reducing stress concentration and saving required power. CONSTITUTION: An impeller blade(4) includes multiple blade surfaces(45 to 48). The blade surface is curved so that pitch angles become smaller from a root portion(44) toward an end portion(43). Initial points for curving the blade surface are dispersed on the blade surface. The width of the root portion is smaller than that of the blade surface. The blade surfaces have identical thicknesses with one another. |
