Rotor damping devices for a turbomachine

Patent metadata

Field	Value
Publication number	US-11879498-B2
Application number	US-202117140925-A
Country	US
Kind code	B2
Filing date	Jan 4, 2021
Priority date	Jan 4, 2021
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

A rotor damping device for a turbomachine is provided. The rotor damping device includes a first fluid damper; and a second damper in communication with the first fluid damper, the second damper comprising a wire mesh, wherein the first fluid damper is transitionable between a working condition and an interruption condition, and wherein, during the interruption condition, the wire mesh of the second damper dampens vibration of the turbomachine.

First claim

What is claimed is:

1. A rotor damping device for a turbomachine, comprising:
a first fluid damper;
a second damper in communication with the first fluid damper, the second damper comprising a wire mesh;
a sidewall portion radially inside a static structure; and
a squirrel cage configured to take up an axial load, the second damper mounted on the squirrel cage,
wherein the first fluid damper transitions between a working condition in which the first fluid damper dampens vibration of the turbomachine and an interruption condition in which the first fluid damper does not dampen vibration of the turbomachine,
wherein, during the interruption condition, the wire mesh of the second damper dampens vibration of the turbomachine; and
wherein the wire mesh is contained within the sidewall portion to constrain axial deflection and apply a preload,
wherein the second damper is in parallel configuration with the first fluid damper.

2. The rotor damping device of claim 1 , further comprising:
a ball bearing mounted on a first portion of the squirrel cage; and
a roller bearing mounted on a second portion of the squirrel cage.

3. The rotor damping device of claim 1 , wherein the first fluid damper includes a film of fluid squeezed between a first non-rotating surface and a second non-rotating surface.

4. The rotor damping device of claim 3 , wherein the film of fluid is oil.

5. The rotor damping device of claim 1 , wherein the first fluid damper includes a damper housing having an outer rim, an inner rim, and a first cavity defined between the outer rim and the inner rim.

6. The rotor damping device of claim 5 , wherein a damper oil is contained within the first cavity and the wire mesh is contained within the first cavity immersed in the damper oil.

7. The rotor damping device of claim 6 , wherein the wire mesh is metal.

8. The rotor damping device of claim 1 , wherein the wire mesh is a shape memory material.

9. The rotor damping device of claim 1 , wherein the first fluid damper transitions to the interruption condition when a fluid runs out or when bottomed out.

10. A rotor damping device for a turbomachine, comprising:
a first fluid damper comprising a damper housing having an outer rim, an inner rim, and a first cavity defined between the outer rim and the inner rim;
a second damper in communication with the first fluid damper, the second damper comprising a wire mesh; and
a squirrel cage configured to take up an axial load, the second damper mounted on the squirrel cage,
wherein the first fluid damper transitions between a working condition in which the first fluid damper dampens vibration of the turbomachine and an interruption condition in which the first fluid damper does not dampen vibration of the turbomachine,
wherein, during the interruption condition, the wire mesh of the second damper dampens vibration of the turbomachine; and
wherein the second damper is in parallel configuration with the first fluid damper.

11. The rotor damping device of claim 10 , wherein a damper oil is contained within the first cavity and the wire mesh is contained within the first cavity immersed in the damper oil.

12. The rotor damping device of claim 11 , wherein the wire mesh is metal.

13. A method for damping vibration of a turbomachine, the method comprising:
providing a rotor damping device comprising a first fluid damper and a second damper in communication with the first fluid damper, the second damper comprising a wire mesh, the second damper mounted on a squirrel cage configured to take up an axial load, wherein the first fluid damper transitions between a working condition in which the first fluid damper dampens vibration of the turbomachine and an interruption condition in which the first fluid damper does not dampen vibration of the turbomachine; and
damping vibration of the turbomachine with the second damper during the interruption condition,
wherein the second damper is in parallel configuration with the first fluid damper.

Assignees

• Gen Electric

Inventors

• Schmidt Richard
• Payyoor Narayanan
• Pankaj Peeyush

Classifications

• F16C27/045 Primary

  with a fluid film, e.g. squeeze film damping · CPC title

• F01D5/26

  Antivibration means not restricted to blade form or construction or to blade-to-blade connections {or to the use of particular materials} · CPC title

• F01D25/164 Primary

  Flexible supports; Vibration damping means associated with the bearing · CPC title

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F01D25/16 Primary

  Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F16C) · CPC title