Self-ventilated electrical machine with arrangement to facilitate assembly and dismantling of the ventilator disk

Abstract

In a self-ventilated electrical machine with vertical shaft, the ventilator is centered and releasably fastened to a hub on the rotor shaft below the stack of rotor plates. The ventilator must be detached from the hub before it can be removed from the housing of the machine. To facilitate assembly and dismantling of the ventilator disk on the hub, the hub has an annular protuberance which can be gripped radially from behind. At least three mobile clamping pieces are distributed uniformly around its circumference and can be engaged by interlocking or friction. The clamping pieces are carried by the ventilator disk and at least one limit stop for each clamping piece is arranged on the holding device for each clamping piece. This clamping connection of the ventilator to the hub of the rotor shaft is particularly suitable for self-ventilated high-voltage motors with high output and with a vertical rotor shaft.

Dependencies are inferred from the claim text.