Voith Patent Gmbh

Jonas Steegmaier

Daniel Ludwig

A rotor rim for an electric machine, having at least two solid annular plates and axially oriented tension bolts connecting the annular plates with each other, wherein on the outer circumference of annular plates grooves are arranged for accommodating rotor poles, for each rotor pole at least two tension bolts are provided, between each two adjacent annular plates a layer of intermediate ring elements is arranged, each layer includes exactly one intermediate ring element per rotor pole, intermediate ring elements are arranged such that between each two adjacent intermediate ring elements a ventilation duct is formed which extends from the inside of the rotor rim to the outer circumference of the rotor rim where it opens into space between the rotor poles, and each intermediate ring element is penetrated by at least two tension bolts and only abuts with a part of its axially oriented surface against adjacent annular plates.

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Lonsee, Germany

Jonas Steegmaier