| 摘要 |
Ferro-fluid seals are used to seat rotating parts, for example drive shafts in electric motors. Seals of this type comprise a plurality of parts and necessitate expensive assembly and adjustment operations. However, the seal (20) according to the invention comprises a single part, i.e. the pole ring (25) and the axially shorter of the surfaces delimiting the pole gap expands in cross-section in the direction of the magnetic flux. <IMAGE>
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