Ovate band turbine stage

Rotary kinetic fluid motors or pumps – With passage in blade – vane – shaft or rotary distributor...

Reexamination Certificate

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Details

Other Related Categories

C415S173700, C415S174500, C415S189000, C415S191000, C415S209200, C415S210100, C416S095000, C416S09700R

Type

Reexamination Certificate

Status

active

Patent number

07578653

Description

ABSTRACT:
A turbine stage includes a stator nozzle having a row of vanes mounted between inner and outer bands. The inner band terminates in an ovate ledge converging aft from the vanes with radially outer and inner convex surfaces joined at a convex apex. The ovate ledge reduces aerodynamic losses at the rotary seal with a row of following turbine rotor blades.

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patent: 7507069 (2009-03-01), Kizuka et al.
Co-pending U.S. Appl. No. 11/642,002, filed Dec. 19, 2006.

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