发明申请
US20070077146A1 Steam turbine rotor, inverted fir-tree turbine blade, low pressure steam turbine with those rotors and blades, and steam turbine power plant with those turbines
有权
蒸汽涡轮转子，倒fir树叶片，带有这些转子和叶片的低压蒸汽轮机，以及具有这些涡轮机的汽轮机发电厂
- 专利标题： Steam turbine rotor, inverted fir-tree turbine blade, low pressure steam turbine with those rotors and blades, and steam turbine power plant with those turbines
- 专利标题（中）： 蒸汽涡轮转子，倒fir树叶片，带有这些转子和叶片的低压蒸汽轮机，以及具有这些涡轮机的汽轮机发电厂
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申请号： US11529231申请日： 2006-09-29
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公开(公告)号： US20070077146A1公开(公告)日： 2007-04-05
- 发明人: Fumiyuki Suzuki , Kunio Asai , Takeshi Kudo , Tateki Nakamura
- 申请人： Fumiyuki Suzuki , Kunio Asai , Takeshi Kudo , Tateki Nakamura
- 优先权： JP2005-285734 20050930
- 主分类号： F01D5/30
- IPC分类号： F01D5/30
摘要：
In a turbine rotor in which a rotor material has lower tensile strength than a blade material and the difference in tensile strength between both the materials is large, a strength margin on the blade side is properly distributed to a strength margin on the rotor side with the aim of reducing shear stress in a rotor hook, increasing stiffness of the rotor hook, and reducing peak stress in a rotor neck, to thereby provide a steam turbine rotor and an inverted fir-tree turbine blade in which stress balance is made more appropriate depending on a material strength ratio of the blade material to the rotor material. In the turbine rotor, a rotor radial-direction hook length (Hri) of an i-th rotor hook counting from the outermost circumference of the rotor and a blade radial-direction hook length (Hbi) of an i-th blade hook counting from the outermost circumference of the blade are set to satisfy the relationship of (Hri>Hbi). In the turbine blade, a rotor circumference-direction neck width (Wri) of an i-th rotor neck counting from the outermost circumference of the rotor and a blade circumference-direction neck width (Wbi) of an i-th blade neck counting from the innermost circumference of the blade are set to satisfy the relationship of (Wri>Wbi).