(EN) PROBLEM TO BE SOLVED: To provide a method and device for simulation testing on the centrifugal stress of a turbine blade, accurately testing the inherent defect of a portion with erosion-resistant material welded and overlayed to the boundary between a blade and a shroud in a single turbine blade by a static method.
SOLUTION: While the blade root 18 of the turbine blade 10 is loaded in a blade root retaining portion 20 and the fitting looseness of the blade root 18 into the blade root retaining portion 20 is removed by adding a force in a centrifugal direction from the outside of the blade root retaining portion 20 to the blade root 18, a pressing force equivalent to a centrifugal force during operation of a turbine is added to the shroud 12, and while the portion of the shroud 12, opposed to a portion applied with the pressing force, is fixed, the pressing force equivalent to the centrifugal force and the torsional return deformation of the turbine blade 10 caused by the operation of the turbine is added to the shroud 12. Then, the simulation testing is performed on the centrifugal stress of the welded and overlayed portion.
COPYRIGHT: (C)2011,JPO&INPIT
【課題】翼部とシュラウドの境界部に耐エロージョン性材料を溶接肉盛した部分における、内在欠陥を静的な方法で、タービン翼単体で精度良くテストできる、タービン翼の遠心応力模擬試験方法及び装置を提供することが課題である。
【解決手段】タービン翼１０における翼根１８を翼根保持部２０に装填し、翼根保持部２０外から翼根１８に遠心力方向の力を加えて翼根１８の翼根保持部２０への嵌合ガタを排除した状態で、シュラウド１２にタービン運転中の遠心力に相当する押圧力を加えると共に、前記シュラウド１２における押圧力印加部位と対向する部位を固定し、タービンの運転により生じるタービン翼１０のねじり戻り変形と遠心力とに相当する押圧力をシュラウド１２に加え、前記溶接肉盛部の遠心応力模擬試験を実施するようにした。
【選択図】 図１