초록 ▼

A gas turbine engine (10) is provided with a plurality of shafts (18, 19, 20) interconnecting its compressor portions (11, 12, 13) with its turbine portions (15, 16, 17). Each shaft (18, 19, 20) is supported in the hotter part of the engine by electromagnetic bearings (26, 28, 32) and by rolling ele

A gas turbine engine (10) is provided with a plurality of shafts (18, 19, 20) interconnecting its compressor portions (11, 12, 13) with its turbine portions (15, 16, 17). Each shaft (18, 19, 20) is supported in the hotter part of the engine by electromagnetic bearings (26, 28, 32) and by rolling element bearings (24, 27, 29, 31, 33) in the remainder of the engine (10). The arrangement provides a simplified liquid lubrication system for the rolling element bearings (24, 27, 29, 31, 33) which reduces the likelihood of lubricant thermal degradation of the lubricant.

대표청구항 ▼

1. 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 an

1. 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.