Foil insert in a joint between machine components

US4980241A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union München GmbH · DE

Inventors

• Wilhelm Hoffmueller · Munich, DE
• Josef Eichner · Scheyern, DE

Key dates

• Filing date: May 2, 1989
• Grant date: Dec 25, 1990
• Expiry date: May 2, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12993
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A foil intermediate layer is arranged between machine parts forming a joint to protect the machine parts against fretting corrosion. The foil intermediate layer includes at least two foils or plies of which the respective inner contact surfaces contacting each other, have a lower coefficeint of friction and a higher resistance to wear and abrasion, than the respective outer surfaces of the foils or plies contacting the joint forming surfaces of the machine parts. Thus, relative motion between the machine parts forming the joint under oscillating loads or vibrations, is transmitted to the easily gliding wear resistant contact surfaces of the plies so that the machine parts are protected from fretting corrosion, whereby their operating lifetime is increased.