Reduced-stress compressor blisk flowpath

US6511294B1 · kind B1 · utility

Assignee

• General Electric Company · US

Inventors

• Mark Joseph Mielke · Blanchester, US
• James E. Rhoda · Mason, US
• David Edward Bulman · Cincinnati, US
• Craig P. Burns · Mason, US
• Paul Michael Smith · Toronto, CA
• Daniel G. Suffoletta · Cincinnati, US
• Steven Mark Ballman · Sharonville, US
• Richard P. Zylka · Kamen, DE
• Lawrence J. Egan · Mason, US

Key dates

• Filing date: Sep 23, 1999
• Grant date: Jan 28, 2003
• Expiry date: Sep 23, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/70
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A gas turbine engine rotor assembly including a rotor having a radially outer rim with an outer surface shaped to reduce circumferential rim stress concentration between each blade and the rim. Additionally, the shape of the outer surface directs air flow away from an interface between a blade and the rim to reduce aerodynamic performance losses between the rim and blades. In an exemplary embodiment, the outer surface of the rim has a concave shape between adjacent blades with apexes located at interfaces between the blades and the rim.