Pitch range for a variable pitch fan

US10288083B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Brandon Wayne Miller · Monroe, US
• Andrew Breeze-Stringfellow · Montgomery, US
• Darek Tomasz Zatorski · Fort Wright, US
• Syed Arif Khalid · Niles, US
• Christopher James Kroger · West Chester, US
• Daniel Alan Niergarth · Cincinnati, US

Key dates

• Filing date: Nov 16, 2015
• Grant date: May 14, 2019
• Expiry date: Sep 19, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variable pitch fan for a propulsion device is provided. The variable pitch fan includes a plurality of fan blades coupled to a disk and a rotatable front hub covering the disk. Each fan blade is rotatable about a pitch axis to vary a pitch of the fan blade. The pitch is variable within a pitch range that is at least about 80° to about 130°. Each fan blade extends radially outward from the disk along a span from a root to a tip. A portion of the span adjacent the root defines a root span region, a portion of the span adjacent the tip defines a tip span region. A solidity of the variable pitch fan is at least 1.0 in the root span region.