发明名称 |
STEAM TURBINE, TURBINE MOVING BLADE, DISC FOR STEAM TURBINE, TREATMENT METHOD OF STEAM TURBINE |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that a fork shape structure which is one of structures combining a turbine moving blade with a disc requires the improvement of fatigue strength and SCC resistance, since a pin hole and a pin for combining a wing fork with a disc fork are in a corrosive environment and also in an environment affected by a large centrifugal force. <P>SOLUTION: Stress improvement processing is performed on the inner surface of the pin hole 6 provided to penetrate the wing fork 2 provided at the turbine moving blade and the disc fork 4 provided at the disc to form a compression residual stress region. The pin hole 6 is formed by reaming, and by the reaming, tensile stress remaining on the inner surface of the pin hole 6 is eliminated and compression residual stress 7 is generated. Thereby, the fatigue strength and the SCC resistance of the steam turbine can be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
申请公布号 |
JP2010043595(A) |
申请公布日期 |
2010.02.25 |
申请号 |
JP20080207763 |
申请日期 |
2008.08.12 |
申请人 |
TOSHIBA CORP |
发明人 |
SENDA ITARU;SASAKI EIJU;MURAKAMI ITARU;MURAKAMI MASATO |
分类号 |
F01D5/30;B23K26/00;F01D5/28;F01D25/00 |
主分类号 |
F01D5/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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