US 12,448,904 B1
Seal assembly mating plate for aircraft powerplant
Rose-Elizabeth Banville, Longueuil (CA); Hugo Quintin, Varennes (CA); Michel Labbe, Montreal (CA); Simon Cartier, St-Bruno-de-Montarville (CA); Cedric Chan Chuen, Laval (CA); and Sebastien Gagne, Longueuil (CA)
Assigned to Pratt & Whitney Canada Corp., Longueuil (CA)
Filed by Pratt & Whitney Canada Corp., Longueuil (CA)
Filed on Sep. 27, 2024, as Appl. No. 18/899,959.
Int. Cl. F01D 25/18 (2006.01)
CPC F01D 25/183 (2013.01) [F05D 2220/323 (2013.01); F05D 2240/55 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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 extends axially along the axis from a first end of the mating plate to a second end of the mating plate;
wherein a surface finish of a first surface of the mating plate at the first end of the mating plate is rougher than a surface finish of a second surface of the mating plate at the second end of the mating plate; and
wherein the seal element axially contacts the second surface of the mating plate.