Gas turbine and method for opening chamber of gas turbine
View Patent ↗A gas turbine includes a rotor rotated by combustion gas produced by a combustor that burns fuel, and a casing that is formed by connecting a plurality of casing members divided in plurality, the casing storing the rotor in an inside thereof, and including a second upper-side second vertical inner flange and a third upper-side first vertical inner flange for connecting a second upper casing member with a third upper casing member different from the second upper casing member among the casing members at the inside.
1. A gas turbine comprising:
a rotator rotated by combustion gas produced by a combustor that burns fuel; and
a casing that is formed by connecting a plurality of casing members divided in plurality, the casing storing the rotator in an inside thereof, and including an inner connection portion for connecting a first casing member with a second casing member different from the first casing member among the casing members at the inside, wherein
the casing is divided by a plane perpendicular to the rotational axis of the rotator,
the inner connection portion is provided at a divided part divided by the plane perpendicular to the rotational axis,
the inner connection portion includes a first inner connection portion formed on the first casing member and projected in a direction toward the rotational axis of the rotator, and a second inner connection portion formed on the second casing member and projected in the direction toward the rotational axis of the rotator,
the first inner connection portion and the second inner connection portion are connected by a connection member, and
the inner connection portion is provided at a portion of a combusting unit chamber in which the combustor is disposed.
2. The gas turbine according to claim 1 wherein the first casing member and the second casing member are connected by the inner connection portion by welding.
3. The gas turbine according to claim 1 , further comprising an outer connection portion, wherein the inner connection portion, in a connection portion of the first casing member and the second casing member, is provided inside the casing at a portion where the outer connection portion connected by a connection member is not disposed.
4. The gas turbine according claim 1 , wherein the casing is divided into an upper casing member and a lower casing member by a plane including the rotational axis of the rotator, and the inner connection portion is not provided on the upper casing member, but only provided on the lower casing member.
5. The gas turbine according to claim 1 , wherein the inner connection portion is circularly provided at an inside of a side periphery of the casing formed in a cylindrical shape along a circumferential direction over an entire periphery.
6. The gas turbine according to claim 5 , further comprising an intermediate shaft cover that includes a portion fitted into the casing, that is supported inside the combusting unit chamber, and that supports the combustor.
7. The gas turbine according to claim 1 , wherein at least one member of members of the casing is connected to a connection portion only provided outside the combusting unit chamber by a connection member.
8. The gas turbine according to claim 1 , further comprising:
a first outer connection portion formed on an outside of the first casing member and projected toward an outside in the radial direction of the rotor; and
a second outer connection portion formed on an outside of the second casing member and projected toward an outside in the radial direction of the rotor, wherein
the first outer connection portion is provided at a rotational axis direction position corresponding to the first inner connection portion,
the second outer connection portion is provided at a rotational axis direction position corresponding to the second inner connection portion, and
the first outer connection portion and the second outer connection portion are connected by a connecting member.
9. A method for opening a chamber of a gas turbine that includes
a rotator rotated by combustion gas produced by a combustor that burns fuel, and
a casing that is formed by connecting a plurality of casing members divided in plurality, the casing storing the rotator in an inside thereof, and including an inner connection portion for connecting a first casing member with a second casing member different from the first casing member among the casing members at the inside, wherein
the casing is divided by a plane perpendicular to a rotational axis of the rotator, and the inner connection portion is provided at a divided part divided by the plane perpendicular to the rotational axis,
the inner connection portion includes a first inner connection portion formed on the first casing member and projected in a direction toward the rotational axis of the rotator, and a second inner connection portion formed on the second casing member and projected in the direction toward the rotational axis of the rotator,
the first inner connection portion and the second inner connection portion are connected by a connection member,
the inner connection portion is provided on a portion of a combusting unit chamber in which the combustor is disposed, and at least one member of members of the casing is connected to a connection portion only provided outside the combusting unit chamber by a connection member, the method comprising:
removing at least one member of members of the combusting unit chamber in which the combustor is disposed, from outside the combusting unit chamber.
10. The method for opening the chamber of the gas turbine according to claim 9 , wherein at least one member of the members of the combusting unit chamber is removed from outside the combusting unit chamber, without removing an intermediate shaft cover that includes a portion fitted into the casing, that is supported inside the combusting unit chamber, and that supports the combustor.