Gas-cooled rotor for a turbo-generator

A gas cooled rotor for a turbo-generator, said rotor including a plurality of winding slots comprising:

• a rotor winding containing a conductor bundle partially disposed in said winding slots, said conductor bundle being traversed by a plurality of substantially tangentially directed cooling channels;
• a slot wedge for retaining said conductor bundle in said slots, said slot wedge including a plurality of at least three inlet channels, and outlet channels for a cooling gas, said inlet channels communicating with said cooling channels at one side of said conductor bundle and having an opening at the rotor periphery in a direction of rotation for the rotor, said outlet channels communicating with said cooling channels at the other side of said conductor bundle and being evenly distributed among wedge portions located between said inlet channels, said inlet channels having projections in a radial plane crossing corresponding projections of said outlet channels;
• a radially outer electrical insulating spacing member, including a plurality of first spacing bodies between a first wall of said slot and said conductor bundle having first axial interspaces therebetween, each being connected to at least three of said inlet channels, and a plurality of second spacing bodies between a second wall of said slot and said conductor bundle having second axial interspaces in between, each of said second axial interspaces being connected to at least three of said outlet channels;
• a radially inner electrically insulating spacing member means comprising at least one bar having a substantially U-shaped cross-section for clasping a radial inner portion of said conductor bundle;
• said outer spacing member and inner spacing member means retain said conductor bundle in a tangential direction with said inner spacing means abutting said walls and
• a plurality of locking members for locking a number of conductors in said conductor bundle to each other.