Patent ID: 8148868
Filing Date: 2012-04-03
Classification: H01R,H02K,Y02E

Abstract:
1. A slip ring assembly for providing electricity to or from a rotor rotating in relation to a stator in a generator or an electrical motor, comprising: a slip ring unit rotating around a centre axis and having at least one first slip ring with an outer surface, a diameter, a periphery and a width, at least one conductive means having conductive contact with the surface of the slip ring, a housing in which the slip ring unit and the conductive means are situated, a suction means in connection with the housing for suction of gas from within the housing out through a suction outlet in the housing and causing a negative pressure within the housing, wherein the suction outlet is in connection with a second guiding means having a second aperture facing the slip ring surface, wherein the housing has a suction inlet which is in connection with a first guiding means, the first guiding means has a first aperture facing the slip ring surface, and the first aperture is positioned at a predetermined distance from the surface of the slip ring so that the gas is able to cool the surface of the slip ring, wherein the slip ring, the first aperture, and the second aperture are located in substantially the same axial location along the length of the centre axis.