Mechanical coupling for a rotor shaft assembly of dissimilar materials

US7527479B2 · kind B2 · utility

Assignee

• Hamilton Sundstrand Corporation (HSC) · US

Inventors

• Jun Shi · Carmel, US
• David J. Bombara · 3a Avenida SO, US
• Kevin E. Green · Broad Brook, US
• Connic Bird · Rocky Hill, US
• John E. Holowczak · South Windsor, US

Key dates

• Filing date: Sep 8, 2005
• Grant date: May 5, 2009
• Expiry date: Apr 16, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/292
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A mechanical coupling for coupling a ceramic disc member to a metallic shaft includes a first wedge clamp and a second wedge clamp. A fastener engages a threaded end of a tie-bolt to sandwich the ceramic disc between the wedge clamps. An axial spring is positioned between the fastener and the second wedge clamp to apply an axial preload along the longitudinal axis. Another coupling utilizes a rotor shaft end of a metallic rotor shaft as one wedge clamp. Still another coupling includes a solid ceramic rotor disc with a multiple of tie-bolts radially displaced from the longitudinal axis to exert the preload on the solid ceramic rotor disc.