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Mass offset for damping performance

  • US 10,641,109 B2
  • Filed: 03/11/2014
  • Issued: 05/05/2020
  • Est. Priority Date: 03/13/2013
  • Status: Active Grant
First Claim
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1. A gas turbine engine rotor assembly comprising:

  • a plurality of blades spaced apart from each other for rotation about an axis, each of the blades including a platform having an inner surface and an outer surface, and wherein adjacent platforms are separated from each other by a gap; and

    a damper defined by a center of mass and positioned to have an outer surface that abuts directly against the inner surfaces of the adjacent platforms across the gap, and wherein a first portion of the outer surface of the damper contacts the inner surface of one of the adjacent platforms at a first edge of the gap and a second portion of the outer surface of the damper contacts the inner surface of the other of the adjacent platforms at a second edge of the gap that is opposite of the first edge of the gap such that the damper is in contact with the first and second edges while extending across the gap, and wherein the center of mass of the damper is aligned with the gap between adjacent platforms and is positioned closer to one of the adjacent platforms than the other of the adjacent platforms, and wherein the center of mass is offset from a centerline of the gap between adjacent platforms.

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