초록 ▼

A high pressure first stage turbine and seal assembly are described. In one embodiment, a high pressure turbine section is provided. The turbine section includes at least one stage, at least one rotor and a bucket assembly. The bucket assembly includes a bucket and an attachment fixture. The stage h

A high pressure first stage turbine and seal assembly are described. In one embodiment, a high pressure turbine section is provided. The turbine section includes at least one stage, at least one rotor and a bucket assembly. The bucket assembly includes a bucket and an attachment fixture. The stage has a high root reaction during operation. An intermediate space is between the bucket assembly and a stationary component of the turbine section. A seal is provided between the stationary member and the rotor to facilitate preventing leakage from the intermediate space toward an end of the stage. Steam balance holes are provided in the rotor or the bucket to facilitate feeding steam towards an end of the turbine stage.

대표청구항 ▼

What is claimed is: 1. A high pressure turbine section comprising:a rotor extending through said high pressure turbine section; andat least one stage having a high root reaction greater than about 0% and less than about 40% during operation, said at least one stage comprising:an end;a bucket assembl

What is claimed is: 1. A high pressure turbine section comprising:a rotor extending through said high pressure turbine section; andat least one stage having a high root reaction greater than about 0% and less than about 40% during operation, said at least one stage comprising:an end;a bucket assembly coupled to said rotor, said bucket assembly comprising a bucket and a root platform extending upstream from said bucket;a stationary component positioned upstream from said bucket assembly and adjacent to said end of said at least one stage such that an intermediate space is defined between said bucket assembly and said stationary component;a plurality of wheel steam balance holes extending through said root platform and beneath said bucket, said plurality of wheel steam balance holes configured to provide a path for shell steam from a cavity defined downstream from said bucket towards a bowl formed at said end of said at least one stage;a first seal coupled to said stationary component; anda second seal defined within said root platform, said first seal and said second seal interconnect to facilitate reducing leakage from said intermediate space toward said end of said at least one stage, wherein said high pressure turbine section channels steam towards said bucket such that a portion of the steam is channeled across said bucket in a first direction, and a portion of the steam is channeled through said first seal and said second seal in a second direction that is opposite the first direction, wherein a portion of the steam channeled across said bucket is channeled through said plurality of wheel steam balance holes in the second direction.