Magnetic-foil bearing supporting turbine engine rotating structure

A turbine engine, comprising:

• a shaft rotatable about an axis;
• a mid-turbine frame circumscribing the axis;
• a magnetic-foil bearing rotatably mounting the shaft to the mid-turbine frame, the magnetic-foil bearing including a magnetic bearing rotor, a frame, a magnetic bearing stator and a foil bearing radially between the magnetic bearing rotor and the magnetic bearing stator, the foil bearing including a top foil and a bump foil configured to bias the top foil radially inward towards the axis, the top foil including a top mount flange and a top mount rim, the top mount flange projecting radially outward from the top foil to a radial outer end, the top mount rim projecting laterally outward from the radial outer end of the top mount flange to a lateral distal end, the magnetic bearing rotor mounted with the shaft, the magnetic bearing stator mounted with the mid-turbine frame, the frame including an axially extending retention slot, the frame mounting the foil bearing to the magnetic bearing stator, the top mount rim and a portion of the top mount flange disposed within the retention slot, and the magnetic bearing stator circumscribing the frame;
• and
• a bearing carrier disposed radially between the magnetic-foil bearing and the mid-turbine frame, the bearing carrier mounted to the mid-turbine frame;
• wherein the mid-turbine frame includes an inner frame case axially aligned with and circumscribing the magnetic-foil bearing and the bearing carrier;
• and
• wherein the magnetic-foil bearing is secured to the bearing carrier by a fastener, the fastener projects axially through the magnetic-foil bearing and the bearing carrier.

A turbine engine, comprising:

• a compressor section, a combustor section, a turbine section and a flowpath extending through the compressor section, the combustor section and the turbine section from an inlet to an exhaust, the combustor section comprising a combustor;
• a first rotating structure including a first compressor rotor within the compressor section and a first turbine rotor within the turbine section, the first rotating structure rotatable about an axis;
• a turbine frame circumscribing the axis;
• a bearing carrier secured to the turbine frame;
• and
• a magnetic-foil bearing disposed along the turbine section and rotatably supporting the first rotating structure, the magnetic-foil bearing including a magnetic bearing rotor, a frame, a magnetic bearing stator and a foil bearing axially aligned with and radially between the magnetic bearing rotor and the magnetic bearing stator, the frame extending axially along and circumferentially about the axis, the magnetic bearing stator comprising a stator lamination that circumscribes the foil bearing, the magnetic bearing stator secured to the bearing carrier by a fastener, the fastener projecting axially through the magnetic bearing stator and the bearing carrier, the magnetic bearing stator including a plurality of stator protrusions projecting radially inward into the frame, the foil bearing disposed within an inner bore of the frame, and the foil bearing circumscribing the magnetic bearing rotor, the frame including a plurality of channels, each of the plurality of channels extending within the frame between circumferentially opposing channel sides and axial opposing channel sides, and each of the plurality of channels receiving a respective one of the plurality of stator protrusions.