Title:
INTERSHAFT SEAL WITH ASYMMETRIC SEALING RING
Document Type and Number:
WIPO Patent Application WO/2016/179608
Kind Code:
A3
Abstract:
An intershaft seal assembly (30) for use between an inner shaft (32) and an outer shaft (31) rotatable within a turbine engine is presented. The seal assembly (30) includes a sealing ring (33), an inner ring (39), and a pair of end rings (37, 38). The sealing ring (33) further includes a plurality of asymmetric ring segments (34) whereby each asymmetric ring segment (34) further includes a vertical flange (46) and a pair of horizontal flanges (47) extending from the vertical flange (46) in a non-symmetric arrangement. The non- symmetric seal geometry provides an axial force balance thereby reducing wear and increasing seal life. The sealing ring (33) is disposed about the inner ring (39). The inner ring (39) includes a plurality of ridges (43) that engage the asymmetric ring segments (34) so as to prevent rotation of the asymmetric ring segments (34) with respect to the inner shaft (32). The end rings (37, 38) are disposed about the sealing ring (33) and the inner ring (39). The horizontal flanges (47) separately contact the end rings (37, 38) so that the vertical flange (46) extends from and between the end rings (37, 38) in the direction of the outer shaft (31). A non-contact seal is formed between an outer sealing surface (62) along the vertical flange (46) and an inner sealing surface (63) along the outer shaft (31).
Inventors:
GARRISON GLENN M (US)
Application Number:
PCT/US2016/033165
Publication Date:
February 23, 2017
Filing Date:
May 19, 2016
Export Citation:
Assignee:
STEIN SEAL CO (US)
International Classes:
F01D11/00; F01D25/16; F16J15/44
Foreign References:
| US20120261887A1 | 2012-10-18 | |||
| US20100164180A1 | 2010-07-01 | |||
| US20070085278A1 | 2007-04-19 | |||
| US4405134A | 1983-09-20 | |||
| US4750746A | 1988-06-14 |
Attorney, Agent or Firm:
CRILLY, Michael, G. (US)
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