| 摘要 |
Method for manufacturing blades to flow machines of axial type, such as axial fans, comprising the steps of:
providing a unit (8) which has at least one along a longitudinal axis (A-A) extended main part (1), which unit (8) has at least one longitudinal side portion (10) extending between two opposite ends of the unit (8), each side portion (10) comprising a first longitudinal surface (13a) facing an opposite second longitudinal surface (13b),
turning one end of the unit (8) around the longitudinal axis relative to another end of the unit (8) so that the first longitudinal surface (13a) of said side portion or side portions (10) moves/move relative to the opposite second longitudinal surface (13b) in the direction of said longitudinal axis (A-A), and
after turning to desired angle difference between both ends of the unit (8), fixation of the first longitudinal surface (13a) of said side portion or side portions (10) in its new, relative to the opposite second longitudinal surface (13b) of the side portion (10), position, whereby the achieved twisting is made permanent. A blade for flow machines of the axial type manufactured according tto the above method and a rotor for flow machines comprising a set of such blades are also claimed |
