Fatigue of piston rod caused by unsteady, unbalanced, unsynchronized blade torques in a Kaplan turbine

Luo Yongyao; Wang Zhengwei; Zeng Jidi

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Fatigue of piston rod caused by unsteady, unbalanced, unsynchronized blade torques in a Kaplan turbine

机译：卡普兰汽轮机中的叶片扭矩不稳定，不平衡，不同步引起的活塞杆疲劳

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The stresses in Kaplan turbine piston rod were analyzed to predict failure conditions based on the 3D unsteady flow through the Kaplan turbine. The results show that the predicted stress concentration position in the rod agrees well with the actual fracture position. The mean stress and the dynamic stress in the rod varied greatly with operating conditions. The dynamic stress reached 46.0 MPa at the high head low output condition, which caused the final rod failure. The mean of the dynamic stresses in the rod increase with increasing blade angle error, but the amplitudes decrease.

机译：根据流经Kaplan涡轮机的3D非恒定流，分析了Kaplan涡轮机活塞杆中的应力，以预测故障情况。结果表明，杆中的应力集中预测位置与实际断裂位置吻合良好。杆中的平均应力和动应力会随工作条件而变化很大。在高扬程低输出条件下，动应力达到46.0 MPa，这导致了最终的杆失效。杆中动应力的平均值随叶片角度误差的增加而增加，但幅度减小。

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来源
《Engineering failure analysis》 |2010年第1期|共8页
作者
Luo Yongyao; Wang Zhengwei; Zeng Jidi;
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正文语种 eng
中图分类工程力学;
关键词
Kaplan turbinelt; /keywordgt; lt; keywordgt; Piston rodlt; /keywordgt; lt; keywordgt; Fatigue fracturelt; /keywordgt; lt; keywordgt; Unsynchronizedlt; /keywordgt; lt; keywordgt; Dynamic stress;

机译：Kaplan涡轮/ keyword keyword活塞杆/ keyword keyword疲劳断裂/ keyword keyword不同步/ keyword keyword动态应力;

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专利

1. Fatigue of piston rod caused by unsteady, unbalanced, unsynchronized blade torques in a Kaplan turbine [J] . Luo Yongyao, Wang Zhengwei, Zeng Jidi Engineering failure analysis . 2010,第1期

机译：卡普兰汽轮机中的叶片扭矩不稳定，不平衡，不同步引起的活塞杆疲劳
2. Study on the Reduction of the Resonant Stress of Turbine Blades Caused by the Stage Interaction Force (Simultaneous Optimization of Blade Resonant Stress and Amount of Unbalance) [J] . Yasutomo Kaneko, Toshio Watanabe, Tatsuya Furukawa Journal of Engineering for Gas Turbines and Power . 2021,第6期

机译：阶段相互作用力引起的涡轮叶片谐振应力的减少研究（同时优化叶片共振应力和不平衡量）
3. Computation of dynamic stresses in piston rods caused by unsteady hydraulic loads [J] . Z.W. Wang, Y.Y. Luo, L.J. Zhou Engineering failure analysis . 2008,第1a2期

机译：液压载荷不稳定引起的活塞杆动应力计算
4. STUDY ON THE REDUCTION OF THE RESONANT STRESS OF TURBINE BLADES CAUSED BY THE STAGE INTERACTION FORCE (SIMULTANEOUS OPTIMIZATION OF BLADE RESONANT STRESS AND AMOUNT OF UNBALANCE) [C] . Yasutomo Kaneko, Toshio Watanabe, Tatsuya Furukawa ASME Turbo Expo: Turbomachinery Technical Conference and Exposition . 2020

机译：阶段相互作用力引起的涡轮叶片谐振应力的减少研究（同时优化叶片共振应力和不平衡量）
5. DISCRETE-TIME BLADE PITCH CONTROL FOR WIND TURBINE TORQUE REGULATION WITH DIGITALLY SIMULATED RANDOM TURBULENCE EXCITATION [D] . SHARIF-RAZI, ALI-REZA 1986

机译：数字模拟随机湍流激励的离散时间桨距控制风轮机转矩调节
6. Full-Scale Fatigue Testing of a Wind Turbine Blade in Flapwise Direction and Examining the Effect of Crack Propagation on the Blade Performance [O] . Othman Al-Khudairi, Homayoun Hadavinia, Christian Little, 2017

机译：风力涡轮机叶片沿翼展方向的全尺寸疲劳测试并研究裂纹扩展对叶片性能的影响
7. Influence of Working Environment on Fatigue Life Time Duration for Runner Blades of Kaplan Turbines [O] . Ana-Maria Budai, Vasile Cojocaru, Camelia Jianu 2010

机译：工作环境对轴流式水轮机转轮叶片疲劳寿命的影响

Fatigue of piston rod caused by unsteady, unbalanced, unsynchronized blade torques in a Kaplan turbine

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