Mounting and dismounting device for a liner of a gas turbine and a related method

Patent metadata

Field	Value
Publication number	US-10132243-B2
Application number	US-201615068294-A
Country	US
Kind code	B2
Filing date	Mar 11, 2016
Priority date	Mar 12, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A mounting and dismounting device for a liner of a gas turbine includes two inner rails attached at the turbine housing and each one having a first straight portion, two straight outer rails releasably attached at the turbine housing, wherein the adjacent free ends of the inner and outer rails can be positioned in full alignment one to the other. The rails are adapted to support the liner to be moveable in its axial direction. The inner rails include a second straight portion connected to the first straight portion through a curved portion wherein the axis of the second straight portion is parallel to the axis of the combustion gas passageway.

First claim

The invention claimed is:

1. A mounting and dismounting device for a liner of a gas turbine wherein a front end of the liner is to be connected or disconnected to an inlet portion of a combustion gas passageway, comprising:
two inner rails, arranged essentially parallel one to the other, each one attachable to the turbine housing and each one having a first straight portion, two outer rails, arranged essentially parallel one to the other and attachable to the turbine housing, wherein the adjacent free ends of the inner and outer rails are adjustably positioned to be in full alignment or out of full alignment one to the other, wherein the inner and outer rails are configured to support the liner to be moveable in its axial direction, wherein the inner rails include a second straight portion connected to the first straight portion through a curved portion.

2. The device according to claim 1 , wherein the front free ends of the inner rails are attachable at the turbine housing, preferably to reception holes in the housing, and/or the base free ends of the inner rails are attachable to the turbine housing via connection plates.

3. The device according to claim 1 , wherein the outer rails are attachable to the housing via connection plates.

4. The device according to claim 1 , comprising:
an advancing and retracting mechanism to advance and reject the liner along the inner and outer rails;
an actuation unit connected with the outer rails;
a pulley to be attached at the turbine housing near the inlet portion of the combustion gas passageway;
a cable or wire provided between said pulley and the actuation unit and
attachment elements to connect the cable or wire with the liner.

5. A device according to claim 1 , comprising:
rotatable fixtures to be attached at the turbine housing, the two outer rails being fixedly attached at said rotatable fixtures allowing rotation of the free ends of the outer rails adjacent to the free ends of the inner rails between a first rotational position having full alignment of said free ends one to the other and a second rotational position, wherein the outer rails have a predetermined position to load and/or unload of the liner.

6. The device according to claim 5 , wherein the rotatable fixtures are slidably positioned on a guiding bar in a non-detachable manner and wherein said guiding bar is attachable in a detachable manner at the turbine housing.

7. The device according to claim 5 , wherein the rotatable fixtures are slidably positioned on a guiding bar in a detachable manner and wherein said guiding bar is fixedly attached at the turbine housing.

8. The device according to claim 5 , wherein an actuation element of the rotatable fixtures engages turning elements connecting the guiding bar, wherein friction coatings or friction disks are provided between the actuation element and surfaces of the rotatable fixtures as well as between the rotatable fixtures and the guiding bar, whereas a breaking force defining screw optionally provided with a force exerting spring is provided between respective flange surfaces of the actuation element, the rotatable fixtures and the guiding bar.

9. The device according to claim 5 , wherein the guiding bar is a guiding ring provided at the circumference of the associated liner opening in the turbine housing.

10. The device according to claim 5 , wherein the guiding bar comprises:
a gear rod or a friction surface engaged by one or more complementary gear wheels or friction wheels, respectively.

11. The device according to claim 1 , wherein the free opposite ends of the inner rails and outer rails are hollow, wherein one of the hollow ends in one of the rails comprises:
a positioning device for a connecting retractable pin having a spring pushing the pin in a specific length outside the associated free end to enable it to be inserted in the complementary hollow end of the associated other rail for a continuity connection between the rails.

12. The device according to claim 11 , wherein the one hollow end in one rail comprises:
a slit in the cylinder surface of the hollow end allowing retracting the retractable pin, optionally through a tool which can be engaged in an actuation slot in the pin.

13. A method of mounting a liner in a gas turbine to connect it with an inlet portion of a combustion gas passageway via a mounting device, wherein the mounting device includes two inner guide rails, arranged essentially parallel one to the other, each one attachable to the turbine housing and each one having a first straight portion, two outer guide rails, arranged essentially parallel one to the other and attachable to the turbine housing, wherein the adjacent free ends of the inner and outer guide rails can be positioned in full alignment one to the other, wherein the inner and outer guide rails are configured to support the liner to be moveable in its axial direction, wherein the inner rails include a second straight portion connected to the first straight portion through a curved portion, the method comprising:
positioning the liner in a predetermined position near an intended liner opening,
attaching the outer guide rails at the liner,
rotating the attachment fixtures connected with the guide rails into a position to be fastened at the turbine casing,
fastening the attachment fixtures at the turbine casing,
rotating the outer guide rails with the attached liner supported by the attachment fixtures to align the inner free ends of the outer guide rails with adjacent free ends of the inner guide rails,
optionally connecting said free ends of inner guide rails and outer guide rails,
optionally connecting an advancing and retracting mechanism between the liner and turbine casing, and
advancing the liner along the inner and outer guide rails to connect it with an inlet portion of the combustion gas passageway.

14. A method of dismounting a liner in a gas turbine connected with an inlet portion of a combustion gas passageway via a dismounting device, wherein the dismounting device includes two inner guide rails, arranged essentially parallel one to the other, each one attachable to the turbine housing and each one having a first straight portion, two outer guide rails, arranged essentially parallel one to the other and attachable to the turbine housing, wherein the adjacent free ends of the inner and outer guide rails can be positioned in full alignment one to the other, wherein the inner and outer guide rails are configured to support the liner to be moveable in its axial direction, wherein the inner guide rails include a second straight portion connected to the first straight portion through a curved portion, the method comprising:
fastening the attachment fixtures at the turbine casing,
rotating the outer guide rails to align the inner free ends of the outer guide rails with adjacent free ends of the inner guide rails,
optionally connecting said free ends of inner guide rails and outer guide rails,
optionally connecting an advancing and retracting mechanism between liner and turbine casing,
retracting the liner along the inner and outer guide rails from the connection with an inlet portion of the combustion gas passageway, into a position where it is only positioned on the outer guide rails,
optionally disconnecting said free ends of inner rails from the free ends of the outer guide rails,
optionally disconnecting the advancing and retracting mechanism from the turbine casing,
rotating the attachment fixtures connected with the guide rails with the attached liner-supported by the attachment fixtures into a position to dismount the liner in a predetermined angular po

Assignees

• Ansaldo Energia Switzerland AG

Inventors

• Jorgensen Stephen Wilder
• Mcnally Joshua R
• Gerber Heinz
• Aratori Davide
• Pennel Douglas Anthony
• Seng Daniel

Classifications

• F02C3/14

  characterised by the arrangement of the combustion chamber in the plant (combustion chambers per se F23R; F02C3/205 takes precedence) · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F05D2230/70

  Disassembly methods · CPC title

• F02C7/20 Primary

  Mounting or supporting of plant; Accommodating heat expansion or creep · CPC title

• F02C5/02

  characterised by the arrangement of the combustion chamber in the chamber in the plant (combustion chambers per se F23R) · CPC title