US 11,879,396 B2
Hybrid seal dual runner
Michael A Beinor, Vernon, CT (US); Timothy J. Castaldo, Wethersfield, CT (US); Christopher M. Valva, Manchester, CT (US); Nasr A. Shuaib, Watertown, MA (US); and Mitchell D. Panton, Atlanta, GA (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Nov. 22, 2022, as Appl. No. 17/992,019.
Application 17/992,019 is a continuation of application No. 17/168,768, filed on Feb. 5, 2021, granted, now 11,549,444.
Prior Publication US 2023/0304443 A1, Sep. 28, 2023
Int. Cl. F02C 7/28 (2006.01); F01D 25/18 (2006.01); F02C 7/06 (2006.01)
CPC F02C 7/28 (2013.01) [F01D 25/183 (2013.01); F02C 7/06 (2013.01); F05D 2220/323 (2013.01); F05D 2240/55 (2013.01); F05D 2260/232 (2013.01); F05D 2260/98 (2013.01)] 20 Claims
OG exemplary drawing
1. A turbomachine comprising:
a bearing in a bearing compartment; and
a two-stage first seal system isolating the bearing compartment and comprising:
a runner;
an inner seal encircling the runner; and
an outer seal encircling the runner outward of the inner seal,
wherein the runner has:
a first piece encircled by the inner seal; and
a second piece encircled by the outer seal.