公开(公告)号：CA2562434A1

公开(公告)日：2007-05-03

申请号：CA2562434

申请日：2006-10-03

Applicant: UNITED TECHNOLOGIES CORP

Inventor： CRAIG COLIN D ,  DIBENEDETTO ENZO ,  KMETZ CHRISTOPHER P ,  MILLER JONATHAN L ,  SONDEEN MARK R

IPC: F16J15/34 ,  F02C7/28 ,  F16J15/30

Abstract: A face seal includes a seal seat 24 and a seal element 52 carried by a seal housing 32. The seal element cooperates with the seal seat to establish a seal. The housing includes a support 44 for the seal element and a shroud 42 for effecting a gradual transition between a normal condition and a deteriorated condition. The shroud 42 may have a tip 74 whose properties differ in lubricity, hardness or abradability relative to other portions of the seal housing.