Face seal assembly with composite rotor

A seal rotor for use in a face seal assembly for sealing between rotating components of a gas turbine engine mounted on a rotating shaft and a housing circumscribing the rotating components comprising:

• a metal base portion having a radially extending flange with first and second axially facing surfaces;
• a first ring mounted to the first axially facing surface of the flange by a first braze joint;
• and
• a second ring mounted to the second axially facing surface of the flange by a second braze joint.

A face seal assembly for sealing between rotating components of a gas turbine engine mounted on a rotating shaft and a housing circumscribing the rotating components comprising:

• an annular seal rotor adapted for mounting to the shaft, the seal rotor having
• a metal base portion having a radially extending flange with first and second axially facing surfaces,
• a first braze ring coupling the first axially facing surface of the flange to a first nickel ring,
• a second braze ring coupling the first nickel ring to a first molybdenum ring,
• a third braze ring coupling the first molybdenum ring to a first sealing ring,
• a fourth braze ring coupling the second axially facing surface of the flange to a second nickel ring,
• a fifth braze ring coupling the second nickel ring to a second molybdenum ring, and
• a sixth braze ring coupling the second molybdenum ring to a second sealing ring;
• and
• an annular stator adapted for mounting to the housing and having an axially facing surface that sealingly engages an axially facing surface of the first sealing ring.

A face seal assembly for sealing between rotating components of a gas turbine engine mounted on a rotating shaft and a housing circumscribing the rotating components comprising:

• an annular seal rotor adapted for mounting to the shaft, the seal rotor having
• a metal base portion having a radially extending flange with first and second axially facing surfaces,
• a first braze ring coupling the first axially facing surface of the flange to a first nickel ring,
• a second braze ring coupling the first nickel ring to a first molybdenum ring,
• a third braze ring coupling the first molybdenum ring to a first sealing ring, the first sealing ring formed from a ceramic,
• a fourth braze ring coupling the second axially facing surface of the flange to a second sealing ring, said second sealing ring is formed from low expansion metal and balancing at least said first sealing ring, and
• an annular stator adapted for mounting to the housing and having an axially facing surface that sealingly engages an axially facing surface of the first sealing ring.

A seal rotor for use in a face seal assembly for sealing between rotating components of a gas turbine engine mounted on a rotating shaft and a housing circumscribing the rotating components comprising:

• a metal base portion having a radially extending flange with first and second axially facing surfaces;
• a first braze ring coupling the first axially facing surface of the flange to a first nickel ring;
• a second braze ring coupling the first nickel ring to a first molybdenum ring;
• a third braze ring coupling the first molybdenum ring to a first sealing ring;
• a fourth braze ring coupling the second axially facing surface of the flange to a second nickel ring;
• a fifth braze ring coupling the second nickel ring to a second molybdenum ring;
• and
• a sixth braze ring coupling the second molybdenum ring to the second sealing ring.

A seal rotor for use in a face seal assembly for sealing between rotating components of a gas turbine engine mounted on a rotating shaft and a housing circumscribing the rotating components comprising:

• a metal base portion having a radially extending flange with first and second axially facing surfaces;
• a first braze ring coupling the first axially facing surface of the flange to a first nickel ring;
• a second braze ring coupling the first nickel ring to a first molybdenum ring;
• a third braze ring coupling the first molybdenum ring to a first sealing ring, the first sealing ring formed from a ceramic;
• a fourth braze ring coupling the second axially facing surface of the flange to a second sealing ring, the second sealing ring formed from low expansion metal and balancing at least said first sealing ring.