Slip ring unit and use of the slip ring unit in a wind power assembly

摘要

The unit has an air conveying device (1.5) for introducing ambient air through a filter (1.4) to remove contaminations such as dust particles, and introducing the filtered air into an inner space (I) of a housing (1.1), so that pressure (pi) higher than ambient pressure is generated in the inner space. A rolling bearing (3) is arranged between a rotatable stator group (1) and a rotatable rotor group (2). The air conveying device is partly arranged within outer diameter (Da) of the rolling bearing and arranged in the inner space.