Frictional damper and method for installing the frictional damper

Patent metadata

Field	Value
Publication number	US-2019249738-A1
Application number	US-201916262222-A
Country	US
Kind code	A1
Filing date	Jan 30, 2019
Priority date	Feb 13, 2018
Publication date	Aug 15, 2019
Grant date	—

Abstract

The present application relates to a frictional damper, a frictional damper assembly and method for installing the frictional damper. The frictional damper comprises a split ring; and a disk spring positioned against the split ring and tensioned by the split ring in an installed state.

First claim

What is claimed is:

1 . A frictional damper, comprising:
a split ring; and a disk spring configured to be against the split ring and tensioned by the split ring in an installed state.

2 . A frictional damper in accordance with claim 1 , wherein the disk spring comprises a stack of disk springs.

3 . A frictional damper in accordance with claim 1 , wherein the split ring comprises a gap cut at an angle therein.

4 . A frictional damper in accordance with claim 1 , wherein the disk spring has a general nonlinear spring rate to provide a uniform axial force.

5 . A frictional damper in accordance with claim 1 , wherein the disk spring is configured to be able to move radially relative to the split ring in the installed state.

6 . A frictional damper in accordance with claim 1 , wherein the split ring is configured substantially as a stair-step form.

7 . A frictional damper in accordance with claim 6 , wherein the split ring comprises a higher portion and a lower portion extending from the higher portion forwardly, such that an access is defined by the higher portion and the lower portion, and wherein the higher portion comprises a groove opposite to the lower portion at a radially inner distal end thereof.

8 . A frictional damper in accordance with claim 7 , wherein the groove comprises an accurate slip surface for allowing a radial movement of the disk spring relative to the split ring in the installed state.

9 . A frictional damper in accordance with claim 1 , wherein the split ring comprises a higher surface, a lower surface, a first side wall connecting the higher surface with the lower surface, a second side wall opposite to the first side wall, a base wall opposite to at least a portion of the higher surface, a third side wall connecting the lower surface with the base wall and a groove arranged to connect the second side wall with the base wall, wherein an access is defined by the first side wall and the lower surface.

10 . A frictional damper in accordance with claim 9 , wherein the split ring comprises a recess section connecting the first side wall with the lower surface.

11 . A frictional damper in accordance with claim 9 , wherein the split ring comprises an inclined surface connecting the lower surface with the third side wall.

12 . A frictional damper in accordance with claim 1 , wherein the frictional damper comprises at least one slip surface perpendicular to an axial direction defined by the frictional damper, and wherein the at least one slip surface is located at least between the split ring and the disk spring.

13 . A frictional damper in accordance with claim 1 , wherein the split ring and the disk spring are arranged together to contact with an outer conduit and an inner conduit of an inlet duct of a gas turbine and be configured as a seal.

14 . A conduit assembly, comprising:
an outer conduit including an outer seat; an inner conduit including an inner seat and coupled with the outer conduit; a split ring; and a disk spring positioned against the split ring and tensioned by the split ring in an installed state; wherein the split ring is placed between and contact with the disk spring and the outer seat of the outer conduit, and the disk spring is placed between and contact with the split ring and the inner seat of the inner conduit.

15 . A conduit assembly in accordance with claim 14 , wherein the split ring and the disk spring are arranged together to provide a substantially 360 degree contact with the outer seat of the outer conduit and the inner seat of the inner conduit, respectively.

16 . A conduit assembly in accordance with claim 14 , wherein the outer conduit is a shell of an inlet duct of a gas turbine and the outer conduit is a seal support coupled to the outer conduit, and wherein the split ring and the disk spring are configured together as a circumferential seal between the inner conduit and the outer conduit.

17 . A conduit assembly in accordance with claim 14 , wherein the split ring is configured as a stair-step form and comprises a higher portion and a lower portion extending from the higher portion forwardly, such that an access is defined by the higher portion and the lower portion to receive the outer seat of the outer conduit, and wherein the higher portion comprises a groove opposite to the lower portion at a radially inner distal end thereof to receive an end portion of the disk spring, such that the split ring is restrained outward by the outer seat of the outer conduit and radially inward by the disk spring.

18 . A conduit assembly in accordance with claim 17 , wherein the receiving channel comprises an accurate slip surface for allowing a radial movement of the disk spring relative to the split ring in the installed state.

19 . A method of installing a frictional damper, comprising:
inserting a disk spring onto an inner seat of an inner conduit; pushing a split ring around between an outer seat of an outer conduit and the disk spring until the split ring snaps in place fully around the disk spring, such that the disk spring is tensioned by the split ring, and the disk spring and the split ring are in an installed state between the inner conduit and the outer conduit.

20 . A method in accordance with claim 19 comprising, allowing a relative movement of the disk spring on at least one slip surface in the installed state, the at least one slip surface positioned at least between the split ring and the disk spring and perpendicular to an axial direction defined by the frictional damper, and arranging the split ring and the disk spring to provide a substantially 360 degree contact with the outer seat of the outer conduit and the inner seat of the inner conduit, respectively.

21 . A method in accordance with claim 19 comprising, closing a gap cut at an angle in the split ring when the split ring snaps in place fully around the disk spring.

22 . A method in accordance with claim 19 , wherein the split ring is configured substantially as a stair-step form and comprising a higher portion and lower portion, and when installing, a second side wall of the higher portion presses the disk spring downwardly until there is a sufficient gap between the outer seat of the outer conduit and the disk spring, and then the higher portion of the disk spring goes outwardly through the gap until a first side wall opposite to the second side wall and a lower surface of the lower portion couple with the outer seat of the outer conduit, then the disk spring is tensioned by the split ring in the installed state.

Assignees

• Gen Electric

Inventors

• Rzeszutek Leszek Marek
• Glynn Christopher Charles
• Zatorski Darek Tomasz
• Broniszewski Jakub Jan

Classifications

• F16L55/041

  specially adapted for preventing vibrations (flexible pipe connections F16L27/10) · CPC title

• F01D25/04

  Antivibration arrangements · CPC title

• F05D2260/38

  by a spring, i.e. spring loaded or biased towards a certain position · CPC title

• F16F7/08 Primary

  with friction surfaces rectilinearly movable along each other (F16F7/01 takes precedence {; one of the members being a spring F16F13/02}) · CPC title

• F16F2226/04

  Assembly or fixing methods; methods to form or fashion parts · CPC title