Patent ID: 9074478
Filing Date: 2015-07-07
Classification: F01D,F04D,F05D

Abstract:
1. A damped assembly for a gas turbine engine, comprising: a first member and a second member mechanically connected via an intermediate vibration dampener which has at least first and second surfaces for contacting the first and second members respectively, wherein either or both of the first and second surfaces include a plurality of raised portions in direct contact with the respective member and a plurality of recessed portions which contain adhesive for bonding the intermediate vibration dampener to the respective member, wherein the ratio of the raised portion surface area to the recessed portion surface area for each of the first and second surfaces is predetermined so as to provide a required dampening for a predetermined frequency range, wherein a distribution of the raised portions and recessed portions on either or both of the first and second surfaces is non-uniform, wherein the second member is an elongate member and the intermediate vibration dampener is a sleeve positioned over an end of the elongate member, and wherein a dimension, with respect to a longitudinal axis of the second member, of at least one of the recessed and/or raised portions is extended as compared to at least one other of the recessed and/or raised portions, along the longitudinal axis of the second member.