Turbine nozzle biform repair

US8544173B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Matthew Miller · Maineville, US
• David Edwin Budinger · Loveland, US
• Marek M. Steplewski · Madisonville, US
• Wayne Ray Grady · Hamilton, US
• Robert Ingram Ackerman · Mason, US
• Cary Michael Kinder · Franklin, US
• Ian Craig Linscott · Hamilton, US

Key dates

• Filing date: Aug 30, 2010
• Grant date: Oct 1, 2013
• Expiry date: Oct 31, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49318
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A turbine nozzle may be repaired by severing the inner band from the vanes and outer band, which may then be discarded. A replacement nozzle is cast to include replacement vanes extending between a replacement outer band and an inner web, with the replacement outer band and vanes conforming with the original outer band and vanes. The new web is configured differently than the old inner band and includes a tie bar. The inner band is machined to form vane seats. The web is machined to form plinths atop the tie bar at each of the replacement vanes. The plinths and tie bar are assembled through the vane seats and bonded to the machined inner band to collectively form the repaired turbine nozzle.