Traction motor ventilation bellows are products specially developed for the particular application. The connections can be designed depending on the installation situation on the wagon body or on the bogie. The connections (flanges) of the folding bellows have circumferential sealing surfaces. Backing flanges attached to the folding bellows by vulcanisation provide a homogeneous self-sealing secure connection. The number of folds is determined by the installation space and the expected movement sequences. The geometry of the traction motor ventilation bellows is defined by the connections and the pressure losses. The basic parameter is thereby the volume flow rate of air through the bellows. The folding bellows consist of a rugged silicone-aramid-fabric. The defined geometries are moulded on specially designed tools and tested where required. The folding bellows are stabilised with wire rings if necessary according to the operating requirements.
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