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    • 3. 发明申请
    • 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
    • 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
    • US20070077146A1
    • 2007-04-05
    • US11529231
    • 2006-09-29
    • Fumiyuki SuzukiKunio AsaiTakeshi KudoTateki Nakamura
    • Fumiyuki SuzukiKunio AsaiTakeshi KudoTateki Nakamura
    • F01D5/30
    • F01D5/06F01D5/3007F05D2220/31F05D2250/70
    • 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).
    • 在转子材料的拉伸强度比叶片材料低的涡轮转子中,两种材料之间的拉伸强度差大的情况下,叶片侧的强度边缘适当地分布在转子侧的强度边缘, 旨在减小转子钩中的剪切应力,提高转子钩的刚度,并减少转子颈部的峰值应力,从而提供蒸汽轮机转子和倒fir树式涡轮叶片,其中使应力平衡更合适,取决于 关于刀片材料与转子材料的材料强度比。 在涡轮转子中,从转子的最外周计数的第i转子钩的转子径向钩长度(Hri)和第i个叶片钩的叶片径向钩长度(Hbi)从 叶片的最外周被设定为满足关系(Hri> Hbi)。 在涡轮叶片中,从转子的最外周计数的第i个转子颈部的转子周向颈部宽度(Wri)和第i个叶片颈部的叶片周向颈部宽度(Wbi) 叶片的最内圆周被设定为满足(Wri> Wbi)的关系。
    • 4. 发明授权
    • Blade
    • US09341068B2
    • 2016-05-17
    • US13589233
    • 2012-08-20
    • Kota NaganoKunio Asai
    • Kota NaganoKunio Asai
    • F01D5/30
    • F01D5/30F05D2260/941
    • A blade avoids fretting damage while reducing stress occurring at the neck portion caused by a stress relief groove. The blade is disposed on an outer periphery of a rotor, and includes a blade portion, a dovetail portion for holding the blade on the rotor, a platform portion that connects the dovetail portion and the blade portion, and a stress relief groove that connects a side surface of the platform portion and a blade load bearing surface of the dovetail portion. The dovetail portion has a width that increases toward its bottom side within a range from a connection point between the side surface of the platform portion and the stress relief groove to a connection point between the dovetail portion and the stress relief groove.
    • 刀片避免微动损伤,同时减少由应力消除槽引起的颈部处的应力。 叶片设置在转子的外周,并且包括叶片部分,用于将叶片保持在转子上的燕尾部分,连接燕尾部分和叶片部分的平台部分,以及应力释放槽,其将 平台部分的侧表面和燕尾部分的叶片承载表面。 燕尾部具有在从平台部的侧面与应力消除槽的连接点到燕尾部与应力消除槽的连接点的范围内朝向其底侧增大的宽度。
    • 9. 发明申请
    • TURBINE ROTOR AND TURBINE BLADE
    • 涡轮转子和涡轮叶片
    • US20070237644A1
    • 2007-10-11
    • US11695786
    • 2007-04-03
    • Fumiyuki SuzukiKunio AsaiTakeshi KudoTateki Nakamura
    • Fumiyuki SuzukiKunio AsaiTakeshi KudoTateki Nakamura
    • F01D5/30
    • F01D5/3007F05D2250/70F05D2250/711F05D2250/712
    • The present invention provides a turbine rotor improved in machinability, appropriately balanced in stress, and having rotor hooks and rotor necks constructed to form an attachment structure with respect to an inverted fir tree blade root that has blade hooks and blade necks.The turbine rotor of the present invention has rotor hooks and rotor necks constructed to form an attachment structure with respect to an inverted fir tree blade root that has blade hooks and blade necks with an “n” number of hooks, where n≧3. In this structure, a convex portion of the innermost circumferential rotor hook is formed to be concave in a circumferential direction, with respect to a tangential line that connects a convex portion of the (n−1)th hook from the outermost circumferential rotor hook, and a convex portion of the (n−2)th neck.
    • 本发明提供了一种改进的机械加工性,适当应力平衡的涡轮转子,并且具有构造成相对于具有刀片钩和刀片颈部的倒fir树根根形成附接结构的转子钩和转子颈部。 本发明的涡轮转子具有转子钩和转子颈部,其构造成相对于具有刀片钩和具有“n”个钩子的刀片颈部的倒fir树根部根部形成附接结构,其中n> = 3。 在这种结构中,相对于连接第(n-1)钩从最外周转动钩的凸部的切线,圆周方向上形成有最内圆周转子钩的凸部, 和第(n-2)颈的凸部。