Development and Verification of 3000 Rpm 48 Inch Integral Shroud Blade for Steam Turbine(<Special Issue>International Conferences on Power and Energy)
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概要
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The 3000rpm 48 inch blade for steam turbine was developed as one of the new standard series of LP end blades. The new LP end blades are characterized by the ISB (Integral Shroud Blade) structure. In the ISB structure, blades are continuously coupled by blade untwist due to centrifugal force when the blades rotate at high speed. Therefore, the number of the resonant vibration modes can be reduced by virtue of the vibration characteristics of the circumferentially continuous blades, and the resonant stress can be decreased due to the additional friction damping generated at shrouds and stubs. In order to develop the 3000rpm 48 inch blade, the latest analysis methods to predict the vibration characteristics of the ISB structure were applied, after confirming their validity to the blade design. Moreover, the verification tests such as rotational vibration tests and model turbine tests were carried out in the shop to confirm the reliability of the developed blade. As the final verification test, the field test of the actual steam turbine was carried out in the site during the trial operation, and the vibration stress of the 3000rpm 48 inch blade was measured by use of telemetry system. In the field test, the vibratory stress of the blade was measured under various operating conditions for more than one month. This paper first presents the up-to-date design technology applied to the design of the 3000rpm 48 inch blade. In the second place, the results of the various verification tests carried out in the shop are presented as well as their procedure. Lastly, the results of the final verification tests of 3000 rpm 48 inch blade carried out in the site are presented.
- 一般社団法人日本機械学会の論文
- 2006-05-15
著者
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Mori Kazushi
Mitsubishi Heavy Industries
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Kaneko Yasutomo
Takasago R & D Center, Mitsubishi Heavy Industries, Ltd.
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Ohyama Hiroharu
Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd.
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Kaneko Yasutomo
Takasago R&d Center Mitsubishi Heavy Industries Ltd.
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MORI Kazushi
Takasago R&D Center, Mitsubishi Heavy Industries, Ltd.
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Mori Kazushi
Takasago R&d Center Mitsubishi Heavy Industries Ltd.
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Mori Kazushi
Takasago R & D Center Mitsubishi Heavy Industries Ltd.
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Ohyama Hiroharu
Takasago Machinery Works Mitsubishi Heavy Industries Ltd.
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- Study on Vibration Characteristics of Mistuned Bladed Disk(Vibration Response Analysis by Reduced Model FMM)
- Analysis and Measurement of Damping Characteristics of Integral Shroud Blade for Steam Turbine
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