VENTILATION DEVICE, ESPECIALLY FOR A MOTOR VEHICLE ALTERNATOR

摘要

The invention relates to a ventilation device which is adapted to be fixed to a rotor of a rotating electrical machine and comprises a first ventilator (62a) provided with a flange (64a), at least one second ventilator (62b) provided with a flange (64b), and means for fixing the two ventilators (62a,62b). The external periphery of each ventilator (62a, 62b) respectively comprises radially outwardly extending first limbs (78a) and second limbs (78b), at least some of the limbs comprising a blade (68a,68b), and at least one first limb (78a) and at least one second limb (78b) comprising a first (78a) and a second (78b) mutual covering part for forming a covering region (Z) on which at least part of the fixing means (80, 82) is arranged.