| 摘要 |
<p>An axial fan comprises a casing (1) in which are mounted a driving electric motor (2) and a working wheel (3) secured to it and provided with blades (4). Each blade (4) has a curved surface formed by a linear generatrix oriented perpendicularly to the surface of the working wheel (3) and moving on that surface along the rotation axis of the working wheel along an arc whose radius (R) exceeds the length (L) of its chord. Besides, the surface of the blade (4) is so curved that the angle β of inclination of this chord of the arc which limits the surface of the blade (4) along its periphery is equal to 50-70° in relation to the rotation axis of the working wheel (3).</p> |
