Patent ID: 6378293
Filing Date: 2002-04-30
Classification: F01D,F02C,F05D,F16C,Y02T

Abstract:
A gas turbine engine comprising at least one shaft having an axis of rotation providing a driving interconnection between two portions of said engine, said at least one shaft being primarily supported from the remainder of said engine during normal engine operation by a rolling element bearing and at least one electromagnetic bearing, said bearings being axially spaced apart from each other so that said at least one electromagnetic bearing is positioned in a portion of said engine that is operationally at a higher temperature than the portion of said engine in which said at least one rolling element bearing is positioned, said portion of said engine that is, in operation, at a higher temperature being free of any rolling element bearing and the other of said portions in which said at least one rolling element bearing is positioned being free of any electromagnetic bearing.