Auxiliary member for assembly/disassembly of gas turbine casing, gas turbine having the same, assembly method of gas turbine casing, and disassembly method of gas turbine casing

Patent metadata

Field	Value
Publication number	US-9539680-B2
Application number	US-201213663576-A
Country	US
Kind code	B2
Filing date	Oct 30, 2012
Priority date	Mar 2, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An auxiliary member for assembly/disassembly includes a fixing portion which is fixed to one half casing of a lower half casing and an upper half casing, and a jack receiving portion which extends from the fixing portion and faces an outer surface of the other half casing. When an interval between both end portions in the radial direction of the upper half casing is widened due to heat deformation, the fixing portion of the auxiliary member for assembly/disassembly is fixed to the lower half casing, a jack is disposed between the jack receiving portion of the auxiliary member for assembly/disassembly and the outer surface of the upper half casing, and the interval between both end portions of the jack is widened.

First claim

The invention claimed is:

1. An auxiliary member for assembly/disassembly of a gas turbine casing which covers an outer circumference of a rotor which rotates about a rotational axis and in which a first casing member forming a portion in a circumferential direction of the gas turbine casing and a second casing member forming the other portion in the circumferential direction of the gas turbine casing are connected by a fastener, the auxiliary member comprising:
a fixing portion which is fixed to a radial outer surface of a flange of one of the first and second casing members; and
a jack receiving portion which extends from the fixing portion and faces a radial outer surface of a flange of the other of the first and second casing members.

2. The auxiliary member for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
the first casing member and the second casing member respectively include flange portions which face each other and which are connected by the fastener,
the fixing portion is fixed to the flange portion of one of the first and second casing members, and
the jack receiving portion faces the flange portion of the other of the first and second casing members.

3. The auxiliary member for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
a radial receiving surface, which faces the outer surface of the other of the first and second casing members with an interval therebetween and which is perpendicular to the radial direction with respect to the rotational axis, is formed on the jack receiving portion.

4. The auxiliary member for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
axial receiving surfaces, which face toward one side in an axial direction in which the rotational axis extends and is perpendicular to the axial direction, is respectively formed on the jack receiving portion and the fixing portion.

5. An auxiliary member set for assembly/disassembly of a gas turbine casing, comprising:
a plurality of the auxiliary members for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
at least one portion of a plurality of the auxiliary members for assembly/disassembly forms first radial auxiliary members which include the fixing portion fixed to the first casing member, and
the other portion of the plurality of the auxiliary members for assembly/disassembly forms second radial auxiliary members which include the fixing portion fixed to the second casing member.

6. The auxiliary member set for assembly/disassembly of a gas turbine casing according to claim 5 , further comprising:
a pair of the first radial auxiliary members and a pair of the second radial auxiliary members, wherein
one of the first radial auxiliary members includes the fixing portion which is fixed to one end in the circumferential direction of the first casing member,
the other of the first radial auxiliary members includes the fixing portion which is fixed to the other end in the circumferential direction of the first casing member,
one of the second radial auxiliary members includes the fixing portion which is fixed to one end in the circumferential direction of the second casing member, and
the other of the second radial auxiliary members includes the fixing portion which is fixed to the other end in the circumferential direction of the second casing member.

7. A gas turbine comprising:
the auxiliary member set for assembly/disassembly of a gas turbine casing according to claim 5 ; and
the gas turbine casing which includes the first casing member and the second casing member.

8. An auxiliary member set for assembly/disassembly of a gas turbine casing, comprising:
at least a pair of the auxiliary members for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
the pair of the auxiliary members for assembly/disassembly form radial auxiliary members,
one of the radial auxiliary members includes the fixing portion which is fixed to one end portion in the circumferential direction of one of the first and second casing members, and
the other of the radial auxiliary members includes the fixing portion which is fixed to the other end portion in the circumferential direction of one of the first and second casing members.

9. An auxiliary member set for assembly/disassembly of a gas turbine casing, comprising:
a plurality of the auxiliary members for assembly/disassembly of a gas turbine casing according to claim 1 , wherein
the plurality of the auxiliary members for assembly/disassembly form axial auxiliary members,
one portion of the axial auxiliary members, as first axial auxiliary members, includes the fixing portion which is fixed to the first casing member,
the other portion of the axial auxiliary members, as second axial auxiliary members, forms a group with any of the first axial auxiliary members, and includes the fixing portion which is fixed to the second casing member with an interval in an axial direction, in which the rotational axis extends, to the first axial auxiliary member which forms the group, and
axial receiving surfaces which face each other with an interval therebetween in the axial direction are formed on the jack receiving portion of the first axial auxiliary member, and the fixing portion of the second axial auxiliary member which form the group with the first axial auxiliary member.

10. The auxiliary member set for assembly/disassembly of a gas turbine casing according to claim 9 , further comprising:
a pair of the first axial auxiliary members, and a pair of the second axial auxiliary members which forms a group with the pair of the first axial auxiliary members, wherein
one of the first axial auxiliary members includes the fixing portion which is fixed to one end in the circumferential direction of the first casing member,
the other of the first axial auxiliary members includes the fixing portion which is fixed to the other end in the circumferential direction of the first casing member,
one of the second axial auxiliary members includes the fixing portion which is fixed to one end in the circumferential direction of the second casing member with an interval in the axial direction to one of the first axial auxiliary members, and
the other of the second axial auxiliary members includes the fixing portion which is fixed to the other end in the circumferential direction of the second casing member with an interval in the axial direction to the other of the first axial auxiliary member.

11. A gas turbine comprising:
the auxiliary member for assembly/disassembly of a gas turbine casing according to claim 1 ; and
the gas turbine casing which includes the first casing member and the second casing member.

12. An assembly method of a gas turbine casing which covers an outer circumference of a rotor which rotates about a rotational axis and in which a first casing member forming a portion in a circumferential direction and a second casing member forming the other portion in the circumferential direction are connected by a fastener, the method comprising:
an auxiliary member preparation step of preparing an auxiliary member for assembly/disassembly in which a fixing portion which is fixed to one of the first and second casing members and a jack receiving portion which extends from the fixing portion and faces a radial outer surface of the other of the first and second casing members are formed;
an auxiliary member fixation step of fixing the fixing portion of the auxiliary member for assembly/disassembly to a radial outer surface of one of the first and second casing members;
a casing member disposition step of disposing

Assignees

• Mitsubishi Heavy Ind Ltd
• Mitsubishi Hitachi Power Sys

Inventors

• Hashimoto Shinya

Classifications

• F01D25/265

  Vertically split casings; Clamping arrangements therefor · CPC title

• F01D25/28 Primary

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

• Y10T29/49229

  Prime mover or fluid pump making · CPC title

• B23P21/00 Primary

  Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with program control · CPC title

• F01D25/243

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title