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
Patent
1998-02-24
1999-10-19
Verdier, Christopher
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
4151744, 4151745, F01D 1102
Patent
active
059677457
ABSTRACT:
A gas turbine shroud and platform seal system, which is constructed so that the flow of sealing air does not disturb a combustion gas flow, and thus any aerodynamic loss is reduced. The leaking air (60) leaks from between a platform (2) of moving blade (1) and an inside shroud (12) in a stationary blade (11). At a front or upstream side of the moving blade (1), the leaking air (60) flows along a S-shaped path within a space (8, 17) formed by a projecting end portion (12b) of the shroud, a honeycomb seal (14) and a projecting portion (4) of the platform. The air eventually flows out in the same flow direction as that of the combustion gas (50) along a surface of the platform (2). At a rear side of the moving blade (1), the leaking air (60) flows along an S-shaped path within a space (6, 9) formed by a projecting end portion (2b) of the platform, a projecting end portion (12b) of the shroud, a honeycomb seal (13) and a seal plate (3). The air eventually flows out in the same direction as that of the combustion gas (50) along a surface of the shroud (12). The air (60) flows in the same direction as the combustion gas (50), and thus a flow loss is reduced. Also, the air is not easily leaked, and a cooling effect of the platform and the shroud is increased due to a film cooling effect.
REFERENCES:
patent: 4507052 (1985-03-01), Thompson
patent: 4820119 (1989-04-01), Joyce
patent: 5313786 (1994-05-01), Chlus et al.
patent: 5522698 (1996-06-01), Butler et al.
patent: 5555721 (1996-09-01), Bourneuf et al.
Fukuno Hiroki
Ito Eisaku
Suenaga Kiyoshi
Tomita Yasuoki
Mitsubishi Heavy Industries Ltd.
Verdier Christopher
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