Method for influencing, damping, or suppressing mechanical vibrations occurring during operation in a turbomachine blade, a turbomachine blade useful for carrying out the method, and a piezoelectric damping element

US8569928B2 · kind B2 · utility

Assignee

• ALSTOM Technology Ltd · CH

Inventors

• Jaroslaw Leszek Szwedowicz · Bad Zurzach, CH
• Wolfgang Kappis · Fislisbach, CH
• Lars Panning · Hannover, DE
• Sebastian Marc Schwarzendahl · Hannover, DE
• Marcus NEUBAUER · Hannover, DE
• Andreas Hohl · Hannover, DE
• Jorg Wallaschek · Paderborn, DE

Key dates

• Filing date: Nov 17, 2011
• Grant date: Oct 29, 2013
• Expiry date: Mar 5, 2032

Classification

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

Abstract

In a method for influencing, in particular damping or suppressing, mechanical vibrations occurring during operation in a turbomachine blade (10), the mechanical vibratory energy of the turbomachine blade (10) is first converted into electrical energy and the electrical energy generated is then converted into heat loss. Effective damping which can be used especially simply and in a versatile way is achieved in that the piezoelectric effect is used in order to convert mechanical vibratory energy into electrical energy.