Piezoelectric damper system for an axial turbomachine rotor

US10125794B2 · kind B2 · utility

Assignee

• SAFRAN AERO BOOSTERS · BE

Inventors

• Régis Viguié · Premnitz, DE
• Damien Verhelst · Meerhout, BE
• André Preumont · Chastre, BE
• Bilal Mokrani · Brussels, BE
• Renaud Bastaits · Ixelles - Elsene, BE

Key dates

• Filing date: Oct 14, 2014
• Grant date: Nov 13, 2018
• Expiry date: Jun 26, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2270/62
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The present application relates to a rotor of a compressor or axial turbomachine comprising a vibration-damping system equipped with piezoelectric transducers distributed circularly and connected to dissipative resonant electric circuits. The circuits are closed and are equipped with a resistor and a coil. The piezoelectric transducers are divided into two sets of alternated transducers, each set being connected to a passive RLC circuit. In order to ensure a pooling of capacitances and currents thereof, the piezoelectric transducers are connected in parallel. During operation, the rotor is subjected to a turning excitation and is likely to vibrate and to deform in accordance with a modal shape with diameters with orthogonal deformation waves. The number of transducers is equal to the quadruple of the number of diameters of the mode, so as to be able to utilize the symmetrical character of this mode with diameters. The grouping of the piezoelectric transducers that deform in the same way makes it possible to damp the piezoelectric transducers with identical means thus pooled.