Title:
SWIRL-REVERSAL ABRADABLE LABYRINTH SEAL
Document Type and Number:
WIPO Patent Application WO2004113770
Kind Code:
A3
Abstract:
An apparatus for restricting axial flow through the clearance between a rotating shaft and a seal stator comprises an abradable labyrinth seal and swirl-reversal vanes upstream of the labyrinth seal. The shaft comprises a first toothed axial section having a plurality of annular teeth, a second upstream toothed axial section having a few annular teeth from one to three, and a section therebetween having a cylindrical surface of diameter less than the outer edge of the teeth of the toothed sections, the swirl-reversing vanes being fastened to the stator seal between the toothed sections.
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Inventors:
LI JIMING (US)
DE CHOUDHURY PRANABESH (US)
DE CHOUDHURY PRANABESH (US)
Application Number:
PCT/US2004/019496
Publication Date:
January 26, 2006
Filing Date:
June 18, 2004
Export Citation:
Assignee:
ELLIOTT CO (US)
LI JIMING (US)
DE CHOUDHURY PRANABESH (US)
LI JIMING (US)
DE CHOUDHURY PRANABESH (US)
International Classes:
F04D29/10; F04D29/66; F16J15/44; F16J15/447; (IPC1-7): F16J15/40; F01D1/02; F01D11/00; F16J15/447
Foreign References:
| US4273510A | 1981-06-16 | |||
| US4370094A | 1983-01-25 | |||
| US5967746A | 1999-10-19 | |||
| US0881474A | 1908-03-10 | |||
| US3575523A | 1971-04-20 | |||
| US2963307A | 1960-12-06 | |||
| US4420161A | 1983-12-13 |
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