Low pressure section steam turbine bucket
    3.
    发明专利
    Low pressure section steam turbine bucket 审中-公开
    低压部分蒸汽涡轮机

    公开(公告)号:JP2009216089A

    公开(公告)日:2009-09-24

    申请号:JP2009038781

    申请日:2009-02-23

    摘要: PROBLEM TO BE SOLVED: To improve rigidity, damping characteristics, and vibration stress by using long blades.
    SOLUTION: The bucket has blades 118 of which length is about 45 inches or more. The bucket 102 includes a dovetail part 121 disposed close to a radially inward position of the bucket, a tip shroud disposed close to a radially outward position of the bucket, and an intermediate span shroud 610 disposed at a radially intermediate position between the radially inward position and outward position. The bucket 102 is formed of titanium base alloy comprising aluminum by about 2-6.25 wt.%, vanadium by about 3.5 wt.% or less, tin by about 2.25 wt.% or less, zirconium by about 2.25 wt.% or less, molybdenum by about 1.75-5.0 wt.%, chrome by about 2.25 wt.% or less, silicon by about 0.7 wt.% or less, iron by about 2.3 wt.% or less, and titanium for the rest.
    COPYRIGHT: (C)2009,JPO&INPIT

    摘要翻译: 要解决的问题:通过使用长叶片来提高刚性,阻尼特性和振动应力。 解决方案:铲斗具有长度为约45英寸或更大的刀片118。 铲斗102包括靠近铲斗的径向向内位置设置的燕尾部分121,靠近铲斗的径向向外位置设置的尖端罩,以及设置在径向向内位置之间的径向中间位置的中间跨度护罩610 和向外的位置。 桶102由包含约2-6.25重量%的铝,约3.5重量%或更少的铝,约2.25重量%或更少的锡,约2.25重量%或更少的约0.225重量%的铝的钛基合金形成, 钼为约1.75-5.0重量%,铬为约2.25重量%或更少,硅为约0.7重量%或更少,铁为约2.3重量%或更少,其余为钛。 版权所有(C)2009,JPO&INPIT