Carl A Greco

US Patent:

7201560, Apr 10, 2007

Filed:

Dec 6, 2004

Appl. No.:

11/003454

Inventors:

Charles Thomas O'Clair - Waterford NY, US
Richard Jon Chevrette - Troy NY, US
Carl A. Greco - Guilderland NY, US
Jeyaruban Amirtharajah - Niskayuna NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 11/02

US Classification:

4151742, 415231

Abstract:

A packing ring holder assembly for packing seal segments about a steam turbine rotor includes a nozzle box and a holder cooperable to form a dovetail for securing packing ring segments to the nozzle box. A spring is interposed between the nozzle box and packing ring segment to bias the latter radially inwardly for sealing with the rotor. The holder includes a shoulder for preventing axial movement of the spring in one direction.