Sealing structure of spindle bolt, and gas turbine

A gas turbine that has a plurality of rotor disks having a rotor blade on a periphery thereof, and a steam feed path for supplying steam which cools the rotor blade or the rotor disks, and other members to be heated, the gas turbine comprising:

• a compressor that compresses air to produce combustion air;
• a combustor that supplies fuel to the combustion air produced by the compressor to generate combustion gas;
• and
• a turbine main spindle having the steam feed path or a recovery path for the steam therein, in which the rotor disks and a connecting member located on the compressor side are fixed by a spindle bolt,
• wherein the spindle bolt is disposed off the rotational axis of the rotor disks, a circumference of the spindle bolt is covered with a tubular member in which a section thereof vertical to an axial direction includes a section of a bolt hole for passing the spindle bolt therethrough, between a first stage rotor disk and the connecting member, and opposite ends of the tubular member are made to abut resiliently on the first stage rotor disk and the connecting member on the compressor side, respectively.

A gas turbine that has a plurality of rotor disks having a rotor blade on a periphery thereof, which cools the rotor blade or the rotor disks, and other hot members by steam, the gas turbine comprising:

• a compressor that compresses air to produce combustion air;
• a combustor that supplies fuel to the combustion air produced by the compressor to generate combustion gas;
• and
• a turbine rotor having a feed path or a recovery path for the steam therein, in which the rotor disks and a connecting member located on the compressor side are fixed by a spindle bolt,
• wherein between a first stage rotor disk and the connecting member, a circumference of the spindle bolt is covered with a tubular member in which a section thereof vertical to an axial direction includes a section of a bolt hole for passing the spindle bolt therethrough, and opposite ends of the tubular member are made to abut on the first stage rotor disk and the connecting member on the compressor side, respectively, wherein a sealant is provided between the end of the tubular member and the connecting member on the compressor side.

A gas turbine comprising:

• a compressor that compresses air to produce combustion air;
• a combustor that supplies fuel to the combustion air produced by said compressor to generate combustion gas;
• a turbine rotor having a path for steam cooling, said turbine rotor including a rotor disk and a connecting member that are fixed by a spindle bolt, said connecting member having an extended portion that is fixed to said rotor disk and forms a gap between said extended portion and the spindle bolt;
• a member provided in the gap and configured to cover a circumference of said spindle bolt, said member having a hole extending therethrough that is configured to allow said spindle bolt to pass therethrough, said member having a first end abutting said rotor disk and a second end abutting said connecting member;
• and
• a sealant provided at said first end of said member, said sealant being arranged between said first end and said rotor disk.

A gas turbine comprising:

• a compressor that compresses air to produce combustion air;
• a combustor that supplies fuel to the combustion air produced by said compressor to generate combustion gas;
• a turbine rotor having a path for steam cooling, said turbine rotor including a rotor disk and a connecting member that are fixed by a spindle bolt, said connecting member having an extended portion that is fixed to said rotor disk and forms a gap between said extended portion and the spindle bolt;
• a member provided in the gap and configured to cover a circumference of said spindle bolt, said member having a hole extending therethrough that is configured to allow said spindle bolt to pass therethrough, said member having a first end abutting said rotor disk and a second end abutting said connecting member;
• and
• a sealant provided at said second end of said member, said sealant being arranged between said second end and said connecting member.