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    • 4. 发明授权
    • Gas turbine stationary blade unit
    • 燃气轮机固定叶片单元
    • US6050776A
    • 2000-04-18
    • US152797
    • 1998-09-14
    • Koichi AkagiYukihiro HashimotoMasahito KataokaYasuoki TomitaHiroji Tada
    • Koichi AkagiYukihiro HashimotoMasahito KataokaYasuoki TomitaHiroji Tada
    • F01D5/22F01D9/04F01D9/00
    • F01D5/22F01D9/04F05D2230/60
    • A gas turbine stationary blade unit in which two stationary blades are formed in a single segment by divided shrouds functions to lessen the occurrence of cracks. Two stationary blades 1a, 1b are fixed to an outer shroud and an inner shroud, respectively. Each shroud is divided into two sections 2a, 2b and 3a, 3b. Flanges 4a, 4b are provided to connect the section together by bolts via boltholes 7. Likewise, flanges 5a, 5b are provided to form a similar connection or joint. If the two stationary blades 1a, 1b are fixed in a single segment by the shrouds which are not divided, a restraining force becomes larger, local stress occurs due to thermal stress and the frequency of crack occurrence increases. However, since the shrouds are divided respectively into two parts and jointed together by bolts, the crack occurrence is lessened. Also, pinholes are provided in opposing faces at the divided portion of the shrouds. Also, pins are inserted into the pinholes for connection of the divided shrouds, thereby relative movement between the divided shrouds is prevented and a strong jointed blade unit is provided.
    • 一种燃气轮机固定叶片单元,其中两个固定叶片通过分隔的护罩形成在单个段中,起到减少裂缝发生的作用。 两个固定叶片1a,1b分别固定在外护罩和内护罩上。 每个护罩分为两个部分2a,2b和3a,3b。 凸缘4a,4b被设置成通过螺栓通过螺栓孔7将部分连接在一起。同样,凸缘5a,5b被设置成形成类似的连接或接头。 如果两个固定叶片1a,1b通过未被分割的护罩固定在单个区段中,则约束力变大,由于热应力而产生局部应力,并且裂纹频率增加。 然而,由于护罩被分成两部分并且通过螺栓接合在一起,因此裂纹发生减少。 此外,在护罩的分割部分处的相对面中设置针孔。 此外,销被插入到针孔中以连接分隔的护罩,从而防止分隔的护罩之间的相对运动,并且提供强的接合的刀片单元。