Three parameter damper anisotropic vibration isolation mounting assembly

Patent metadata

Field	Value
Publication number	US-9297438-B2
Application number	US-201213358239-A
Country	US
Kind code	B2
Filing date	Jan 25, 2012
Priority date	Jan 25, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

An anisotropic vibration isolation mounting assembly includes at least two three-parameter vibration isolators each having a first end configured for attachment to a rotating member assembly or a rotating member assembly housing and each having a second, opposing end configured for attachment to the rotating member assembly housing where the first end is configured for attachment to the rotating member assembly or to a system interface member where the first member is configured for attachment to the rotating member assembly housing. The at least two three-parameter vibration isolators are tuned anisotropically to minimize the transmission of vibrations during operation of the rotating machine.

First claim

What is claimed is:

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.

2. The anisotropic vibration isolation mounting assembly of claim 1 , wherein one of the at least three three-parameter vibration isolators has the first end thereof configured for attachment to the rotating member assembly and the second end thereof configured for attachment to the rotating member assembly housing, and wherein another of the at least three three-parameter vibration isolators has the first end thereof configured for attachment to the rotating member assembly housing and the second end thereof configured for attachment to the system interface member.

3. The anisotropic vibration is isolation mounting assembly of claim 1 , wherein each of the at least three three-parameter vibration isolators comprises a mounting portion and a strut portion.

4. The anisotropic vibration isolation mounting assembly of claim 1 , wherein the at least three three-parameter vibration isolators are mounted at non-equal circumferential distances from one another circumferentially about the rotating machine at the same axial position with respect to the axis of rotation.

5. The anisotropic vibration isolation mounting assembly of claim 4 , wherein one of the at least three three-parameter vibration isolators is configured having vibration damping parameters that differ from at least one other of the at least three three-parameter vibration isolators.

6. The anisotropic vibration isolation mounting assembly of claim 1 , wherein one of the at least three three-parameter vibration isolators is configured having vibration damping parameters that differ from at least one other of the at least three three-parameter vibration isolators.

7. The anisotropic vibration isolation mounting assembly of claim 1 , wherein the at least three three-parameter vibration isolators are tuned anisotropically to minimize the transmission of low-frequency vibrations during operation of rotating machine.

8. The anisotropic vibration isolation mounting assembly of claim 1 , wherein the at least three three-parameter vibration isolators are tuned anisotropically to minimize the transmission of critical speed-induced vibrations during operation of rotating machine.

9. The anisotropic vibration isolation mounting assembly of claim 1 , wherein the at least three three-parameter vibration isolators are tuned anisotropically to minimize the transmission of maneuver deflection-induced vibrations during operation of rotating machine.

10. A gas turbine engine assembly configured to be mounted to an airframe, the gas turbine engine assembly comprising:
a gas turbine engine, the gas turbine engine comprising a rotor bearing assembly that rotates about an axis of rotation, a rotor bearing housing, and an engine casing; and
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, each first end is attached to the rotor bearing assembly or the rotor bearing housing, each second end is attached to the rotor bearing housing when the first end is attached to the rotor bearing assembly or to the engine casing when the first end is attached to the rotor bearing housing, the at least three three-parameter vibration isolators tuned anisotropically to minimize transmission of vibrations from the gas turbine engine to the airframe during operation of the gas turbine engine, wherein anisotropic tuning comprises 1) the at least three three-parameter vibration isolators are unequally spaced circumferentially about the rotor bearing assembly or the rotor bearing 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 vib

Assignees

• Meacham Walter Lee
• Bridges Eric
• Margolis Alan
• Honeywell Int Inc

Inventors

• Meacham Walter Lee
• Bridges Eric
• Margolis Alan

Classifications

• Y10T29/49826

  Assembling or joining · CPC title

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F16F15/023 Primary

  using fluid means · CPC title

• F01D25/28

  Supporting or mounting arrangements, e.g. for turbine casing · CPC title

• F16F15/131

  the rotating system comprising two or more gyratory masses · CPC title