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Three parameter damper anisotropic vibration isolation mounting assembly

  • US 9,297,438 B2
  • Filed: 01/25/2012
  • Issued: 03/29/2016
  • Est. Priority Date: 01/25/2012
  • Status: Active Grant
First Claim
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1. An anisotropic vibration isolation mounting assembly that is mounted on and provides vibration isolation to a rotating machine, wherein the rotating machine is selected from the group consisting of:

  • a gas turbine engine, a spacecraft navigational component, a pump, a turbocharger, and a generator, the rotating machine comprising a rotating member assembly that rotates about an axis of rotation, a rotating member assembly housing, and a system interface member, the vibration isolation mounting assembly comprising;

    at least three three-parameter vibration isolators that each comprise a first spring element that is mechanically configured in parallel with a second spring element that is mechanically configured in series with a damper element, each three-parameter vibration isolator having a first end and a second end, wherein each first end is attached to the rotating member assembly or the rotating member assembly housing, each second end is attached to the rotating member assembly housing when the first end is attached to the rotating member assembly or to the system interface member when the first end is attached to the rotating member assembly housing, and further wherein the at least three three-parameter vibration isolators are tuned anisotropically to minimize transmission of vibrations during operation of the rotating machine, wherein anisotropic tuning comprises

         1) the at least three three-parameter vibration isolators are unequally spaced circumferentially about the rotating member assembly or the rotating member assembly housing such that at least one of the vibration isolators is differently spaced circumferentially with respect to its nearest two neighboring vibration isolators, or

         2) the tuning parameters of one of the first spring element, the second spring element, or the damper element of one of the at least three three-parameter vibration isolators differ from the tuning parameters of a respective one of the first spring element, the second spring element, or the damper element of another one of the at least three three-parameter vibration isolators, wherein the at least three three-parameter vibration isolators cooperate to anisotropically minimize transmission of vibrations by damping vibrations in accordance with a first tuning in a first axis and in accordance with a second tuning in a second axis, the first tuning being different from the second tuning, each of the first and second axes being orthogonal to the axis of rotation, and each of the first and second axes being orthogonal to one another, and wherein the at least three three-parameter vibration isolators at different radial elevations with respect to the rotating member assembly, such that at least a first vibration isolator is located radially-outward from the rotating member assembly with respect to at least a second vibration isolator, the at least a second vibration isolator being circumferentially off-set from the at least a first vibration isolator.

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