Blade for rotor blade variable type axial-flow blower

Abstract

Abstract PURPOSE: To promote the reliability of the coupling concerning the strength and the work efficiency by coupling a rotor blade proper and a blade shaft respectively provided with a convex or concave part with a polygonal section in their centres, by means of a box nut. CONSTITUTION: An axial part 4b of the rotor blade proper is processed into a screw on its cylindrical outside. Meanwhile, a disk-shaped collar 5a is provided on the top of a blade shaft to be fitted into a ring-shaped box nut 13 inserted from the inner end of the blade shaft. The axial part 4b of the rotor blade proper and the collar 5a of the blade shaft are respectively provided with a convex or concave part with a polygonal (rice-ball shaped) section on their end faces as Figure "a" shows. A so- called polygonal joint is constructed by fitting these parts with each other. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Masa Ito

Bibliographic Details