Seal assembly mating plate for aircraft powerplant

An assembly for an aircraft powerplant, comprising:

• a rotating seal land extending axially along an axis;
• a seal element axially overlapping, circumscribing and radially sealingly engaging the rotating seal land;
• a stationary seal support axially overlapping and circumscribing the rotating seal land and the seal element, the stationary seal support including a support notch, a support shoulder, a support inner interior surface and a support outer interior surface, the support notch projecting axially into the stationary seal support from a distal end of the stationary seal support to the support shoulder, and the support notch projecting radially outward away from the axis into the stationary seal support from the support inner interior surface to the support outer interior surface;
• and
• a mating plate seated in the support notch and mounted to the stationary seal support, the mating plate axially contacting the support shoulder and the seal element, and the mating plate configured with an asymmetric geometry along the axis, wherein the mating plate includes
• a base seated in the support notch and mounted to the stationary seal support wherein the seal element axially contacts the base;
• and
• an arm projecting axially out from the base in an axial direction away from the seal element, the arm located at a radial inner side of the mating plate.

An assembly for an aircraft powerplant, comprising:

• a rotating seal land extending axially along an axis;
• a seal element axially overlapping, circumscribing and radially sealingly engaging the rotating seal land;
• a stationary seal support axially overlapping and circumscribing the rotating seal land and the seal element, the stationary seal support including a support notch, a support shoulder, a support inner interior surface and a support outer interior surface, the support notch projecting axially into the stationary seal support from a distal end of the stationary seal support to the support shoulder, and the support notch projecting radially outward away from the axis into the stationary seal support from the support inner interior surface to the support outer interior surface;
• a mating plate seated in the support notch and mounted to the stationary seal support, the mating plate axially contacting the support shoulder and the seal element, and the mating plate configured with an asymmetric geometry along the axis;
• and
• a seal ring radially between and engaged with the mating plate and the stationary seal support.

An assembly for an aircraft powerplant, comprising:

• a first seal element extending circumferentially around an axis;
• a second seal element extending circumferentially around the axis;
• a biasing device compressed axially between the first seal element and the second seal element;
• a stationary seal support including a support base and a support flange, the support base axially overlapping and circumscribing the first seal element, the second seal element and the biasing device, the support flange projecting radially inwards towards the axis from the support base, and the support flange abutted axially against the second seal element;
• and
• a mating plate mounted to the support base, the mating plate extending axially between a first end of the mating plate and a second end of the mating plate wherein the second end of the mating plate is axially abutted against the first seal element, and the mating plate configured such that
• when the second end of the mating plate is axially facing the first seal element, the mating plate is operable to be mounted to the support base;
• and
• when the first end of the mating plate is axially facing the first seal element, the mating plate is inoperable to be mounted to the support base.