초록 ▼

An improved combined cycle plant with a gas turbine, a steam turbine and a generator arranged in tandem on a single shaft system in the order aforementioned, including a single thrust bearing with rigidly coupled rotor members. A thrust bearing for the shaft system is supported in a bearing standard

An improved combined cycle plant with a gas turbine, a steam turbine and a generator arranged in tandem on a single shaft system in the order aforementioned, including a single thrust bearing with rigidly coupled rotor members. A thrust bearing for the shaft system is supported in a bearing standard keyed to the foundation on the side of the steam turbine toward the gas turbine to restrain axial movement. The thrust bearing is preferably located in the compressor inlet of the gas turbine. The steam turbine comprises a first casing with the hihg pressure section supported in a bearing standard keyed to the foundation adjacent the thrust bearing. The second casing with the low pressure section is keyed to the foundation at its outlet in the center of the exhaust hood. In a preferred arrangement with a single flow low pressure turbine section, the second casing combines an intermediate pressure turbine section adjacent the generator receiving steam from the reheater. In a modified arrangement with a double flow low pressure section, the intermediate pressure turbine section turbine section is combined with the high pressure turbine section in the first casing.

대표청구항 ▼

In a combined cycle plant having a gas turbine, a steam turbine, and a generator all being disposed on a foundation and arranged in tandem in the order aforementioned on a single shaft system having a single thrust bearing and a plurality of rigidly coupled rotor members, the improvement comprising:

In a combined cycle plant having a gas turbine, a steam turbine, and a generator all being disposed on a foundation and arranged in tandem in the order aforementioned on a single shaft system having a single thrust bearing and a plurality of rigidly coupled rotor members, the improvement comprising: said thrust bearing being supported on first means keyed to said foundation on the side of said steam turbine toward said gas turbine to restrain axial movement of said single shaft system, said steam turbine comprising a reheat steam turbine having a first casing supported at one end thereof on second means keyed to said foundation adjacent said thrust bearing to be restrained against axial movement, said reheat turbine having an exhaust hood and having a second casing supported at least in part within said exhaust hood, said second casing being supported on third means keyed to said foundation near the center of the exhaust hood outlet, whereby said first and second casings grow thermally independently of one another and independently of said single shaft system.