Combustor liner flexible support and method

Patent metadata

Field	Value
Publication number	US-2017350599-A1
Application number	US-201515536224-A
Country	US
Kind code	A1
Filing date	Nov 30, 2015
Priority date	Dec 15, 2014
Publication date	Dec 7, 2017
Grant date	—

Abstract

A combustor for a gas turbine is described. The combustor comprises a combustor liner, a metering plate attached to an end of the combustor liner and a combustor casing at least partially surrounding the combustor liner. An end cover is further connected to the combustor casing. The combustor liner is connected to the combustor casing by means of a retainer arranged between the metering plate and the end cover, and attached to the metering plate and to the end cover.

First claim

What is claimed is:

1 . A combustor for a gas turbine comprising:
a combustor liner having a first end, a second end and a side wall extending between the first end and the second end; a metering plate attached to the first end of the combustor liner; a combustor casing at least partially surrounding the combustor liner; an end cover connected to the combustor casing; and a retainer, connecting the combustor liner to the combustor casing, arranged between the metering plate and the end cover, and attached to the metering plate and to the end cover, the retainer comprising a first ring element constrained to the metering plate and a second ring element arranged between the first ring element and the end cover, and wherein a first elastic arrangement is located between the first ring element and the second ring element, and wherein a second elastic arrangement is located between the second ring element and the end cover.

2 . The combustor of claim 1 , wherein at least one of the first elastic arrangement and the second elastic arrangement is pre-loaded and provides a frictional damping action.

3 . The combustor of claim 1 , wherein the second elastic arrangement is in surface contact with the end cover.

4 . The combustor of claim 1 , wherein the second ring element is provided with resiliently deformable and radially projecting members, in surface contact with the end cover.

5 . The combustor of claim 1 , wherein the metering plate is provided with a plurality of metering holes extending therethrough, and wherein the first ring element is attached to a surface portion of the metering plate devoid of metering holes.

6 . A method for mounting a combustor liner in a combustor casing of a gas turbine combustor, the method comprising:
providing a combustor liner and a metering plate attachable to the combustor liner; providing a combustor casing; providing an end cover attachable to an end of the combustor casing; attaching a metering plate of a combustor liner to a retainer, wherein the retainer comprises a first ring element constrained to the metering plate and a second ring element arranged between the first ring element and the end cover, a first elastic arrangement located between the first ring element and the second ring element, a second elastic arrangement in surface contact with the end cover; attaching the retainer to the end cover and to the metering plate; introducing the combustor liner in the combustor casing; and connecting the end cover to the combustor casing, such that the combustor liner is supported approximately concentrically in the combustor casing.

7 . The method of claim 6 , further comprising resiliently pre-loading at least one of the first elastic arrangement and the second elastic arrangement.

8 . The method of claim 6 , further comprising pre-loading the elastic arrangement against the end cover, thus generating a frictional force therebetween.

9 . The method of claim 6 , further comprising providing a vibration-damping arrangement between the metering plate and the end cover.

10 . The method of claim 6 , further comprising locating the elastic arrangement at least between the second ring element and the end cover.

Assignees

• Nuovo Pignone Srl

Inventors

• Jangid Biharilal

Classifications

• F23R2900/00014

  Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators · CPC title

• F23R2900/00017

  Assembling combustion chamber liners or subparts · CPC title

• F23R3/60 Primary

  Support structures; Attaching or mounting means · CPC title

• F23R3/48 Primary

  Flame tube interconnectors, e.g. cross-over tubes · CPC title

• F23R3/002

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title