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    • 6. 发明授权
    • High and low pressure sides-integrating system turbine, long blades thereof and combined cycle power generation system
    • 高低压侧系统涡轮,长叶片和联合循环发电系统
    • US06182439B2
    • 2001-02-06
    • US09385139
    • 1999-08-31
    • Masao SigaTakeshi OnodaShigeyoshi NakamuraRyo Hiraga
    • Masao SigaTakeshi OnodaShigeyoshi NakamuraRyo Hiraga
    • F01D528
    • F01D5/142C22C38/001C22C38/46C22C38/48F01D5/141F01D5/28F05D2240/60F05D2300/171
    • A combined cycle power generation system in which a generator is driven by a steam turbine and a gas turbine includes a steam turbine rotor having a mono-block rotor shaft with blades mounted thereon in multi-stages from a high pressure side to a low pressure side and a casing covering the rotor. An inlet temperature of steam to first stage blades is not less than 530° C. and the rotor shaft is made of a Ni—Cr—Mo—V low alloy steel of bainitic structure having a higher creep rupture strength at the high pressure side than at the low pressure side and a 538° C. and 105 h creep rupture strength not less than 12 kg/mm2 at a central portion, and having mounted thereon at the central portion, first stage blades at the high pressure side or FATT of not more than 20° C. Final stage blades are mounted at the low pressure side having a room temperature V-notch impact value of not less than 4 kg/m, and blades of at least a final stage have a value of blade length in inches times revolution in rpm of not less than 125,000 and are made of martensite stainless steel including 8-13 wt. % Cr.
    • 发电机由蒸汽轮机和燃气轮机驱动的联合循环发电系统包括具有单块转子轴的汽轮机转子,该单块转子轴具有从高压侧到低压侧多级安装的叶片 以及覆盖转子的壳体。 第一级叶片的蒸汽入口温度不低于530℃,转子轴由高压侧具有较高蠕变断裂强度的贝氏体组织的Ni-Cr-Mo-V低合金钢制成, 在低压侧,538℃和105h蠕变断裂强度在中心部分不小于12kg / mm2,并且在中心部分安装在其上,在高压侧的第一级叶片或不是FATT的FATT 超过20℃。最终级叶片安装在低压侧,其室温V形缺口冲击值不小于4kg / m,并且至少最后一级的叶片具有以英寸为单位的叶片长度的值 转速不低于125,000 rpm,由马氏体不锈钢制成,包括8-13wt。 %Cr。