Exciter-current lead-through bolt interconnecting rotor shaft-enclosed lead-in conductor bar and terminal conductor bar leading to rotor winding

摘要

An exciter current lead-through bolt which is passed through a radial bore in the rotor shaft of a dynamo-electric machine, especially a turbo-generator, and screwed into an exciter-current lead-in conductor bar which lies in a longitudinally extending bore within the shaft. The radially outer part of the lead-through bolt is mechanically and electrically connected with a terminal conductor bar leading to the exciter winding located on the rotor. In order to reinforce the lead-through bolt and minimize the danger of breakage, a radially inwardly directed resilient force is applied to the outer end of the bolt. Provision is also made for internal as well as external cooling of the through-bolt by air which is taken in by respective air pick-up devices located on the surface of the shaft.