Seal arrangement

Details Seal arrangement Seal arrangement

2006-05-17

2008-11-11

Edgar, Richard (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between axial flow runner and vane or vane diaphragm structure

C415S196000

Reexamination Certificate

active

07448851

ABSTRACT:
A seal arrangement30presents a barrier in the form of a combined seal and anti-fret liner36across a shroud ring cavity32in order to inhibit air leakage in the platform gap between platforms33. It will be understood that these gaps are provided for thermal expansion and vibration of vane assemblies but create a leakage path between passage35and cavity32which can increase aerodynamic losses and therefore reduce engine compressor efficiency. By provision of a combined seal and anti-fret liner36such air losses are reduced whilst combining the function of an air leakage seal and an anti-fret liner to prevent abrasive degradation of the mountings37, 39and platform section33ensures that there is a reduced component count as well as cost, weight and assembly time.

REFERENCES:
patent: 4897021 (1990-01-01), Chaplin et al.
patent: 2004/0031270 (2004-02-01), Sileo
patent: 2004/0031271 (2004-02-01), Jorgensen
patent: 1 433 926 (2004-06-01), None
patent: WO 02/33224 (2002-04-01), None

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