The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2018
Filed:
Oct. 14, 2014
Techspace Aero S.a., Herstal (Milmort), BE;
Universite Libre DE Bruxelles, Brussels, BE;
Régis Viguié, Waremme, DE;
Damien Verhelst, Liège, BE;
André Preumont, Chastre, BE;
Bilal Mokrani, Brussels, BE;
Renaud Bastaits, Ixelles, BE;
SAFRAN AERO BOOSTERS SA, Herstal (Milmort), unknown;
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.