Shroud block with enhanced cooling

Details Shroud block with enhanced cooling Shroud block with enhanced cooling

2007-10-23

2007-10-23

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Between blade edge and static part

C416S191000

Reexamination Certificate

active

10906377

ABSTRACT:
A shroud for surrounding a portion of a turbine flow path having improved cooling and durability is disclosed. The shroud includes a plurality of generally axial cooling holes spaced a substantially equal distance apart and a plurality of generally circumferential cooling holes oriented generally perpendicular to the generally axial cooling holes. The generally circumferentially cooling holes are spaced a non-uniform distance apart so as to provide cooling to selected portions of shroud sidewalls to lower shroud operating temperatures and improve shroud durability.

REFERENCES:
patent: 4013376 (1977-03-01), Bisson et al.
patent: 4752184 (1988-06-01), Liang
patent: 5486090 (1996-01-01), Thompson et al.
patent: 6126389 (2000-10-01), Burdgick
patent: 6340285 (2002-01-01), Gonyou et al.
patent: 6393331 (2002-05-01), Chetta et al.
patent: 7033138 (2006-04-01), Tomita et al.

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