Abstract：According to the structures of seal rings in Francis-turbine, the sealing model was simplified and advanced in order to reduce self-excited vibration produced by fluid in seal rings of the Francis-turbine. The experiment rig was manufactured based on the model. By measuring the rotor vibration directly, the vibration amplitude, oscillogram and frequency spectrogram between the simplified sealing model and honeycomb seals were contrasted under the conditions of various rotor eccentricity, and the vibration amplitude features of the two kinds of seals with and without imbalance mass added to the rotor were investigated. The results show that compared with the labyrinth ones, the honeycomb seal can more effectively suppress the vibration caused by rotor eccentricity and mass imbalance. The vibration behaviors are contrasted by installing water pumping device in upstream and downstream of minimal seal clearance, and the water pumping device in upstream of minimal seal clearance can significantly reduce rotor vibration.
何立东， 尹德志， 李承曦， 伍伟. 水轮机应用蜂窝密封的吸水和减振模拟试验[J]. 排灌机械工程学报, 2010, 28(3): 215-218.
He Lidong， Yin Dezhi， Li Chengxi， Wu Wei. Simulation experiment on water pumping and vibration suppression of Francis-turbine applying honeycomb seals. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(3): 215-218.
［1］侯袆华, 齐学义, 常一乐，等.基于Pro/E的水轮机转轮三维造型［J］.排灌机械,2006,24(1):14-16.Hou Yihua, Qi Xueyi, Chang Yile, et al. 3-D design of hydro turbine′s runner based on Pro/E［J］. Drainage and Irrigation Machinery, 2006, 24(1):14-16.（in Chinese）［2］Kumar P, Saini R P. Study of cavitation in hydro turbines—a review［J］. Renewable and Sustainable Energy Reviews，2010,14(1):374-383.［3］吉敬华，孙玉坤，赵文祥，等.转子静态偏心开关磁阻电机径向力计算及补偿［J］.江苏大学学报：自然科学版，2008,29(5):432-436. Ji Jinghua, Sun Yukun, Zhao Wenxiang, et al. Calculation and remedial strategy for radial force in switched reluctance motors with static eccentricity［J］.Journal of Jiangsu University：Natural Science Edition, 2008, 29(5):432-436.（in Chinese）［4］林铭贤.混流式水轮机组振动初探［J］.水力科技，2001(1):52-53. Lin Mingxian. Initial explore of Francis turbine group vibration［J］. Hydraulic Technology, 2001(1):52-53.（in Chinese）［5］Liang Q W， Rodriguez C G, Egusquiza E，et al. Numerical simulation of fluid added mass effect on a Francis turbine runner［J］.Computer & Fluid，2007，36(6)：1106-1118.［6］Wang W Z，Liu Y Z， Meng G，et al. Nonlinear analysis of orbital motion of a rotor subject to leakage air flow through an interlocking seal［J］.Journal of Fluids and Structures，2009，25(5)：751-765.［7］Dowson P，Walker M S， Watson A P. Development of abradable and rub-tolerant seal materials for application in centrifugal compressors and steam turbines［J］. Sealing Technology，2004(12)：5-10.［8］张强，何立东.蜂窝密封动力特性系数的计算方法［J］.中国电机工程学报，2007,27(11):98-102. Zhang Qiang, He Lidong. Study on calculation of the dynamic coefficients of honeycomb seals［J］. Proceedings of the CSEE, 2007, 27(11):98-102.（in Chinese）［9］郭红梅.混流式水轮机振动研究［J］.福建农机，2005(3):17-21. Guo Hongmei. Research of Francis-turbine vibration［J］. Fujian Agricultural Machinery, 2005(3):17-21.（in Chinese）［10］Gbadebo S A， Cumpsty N A， Hynes T P. Control of three-dimensional separations in axial compressors by tailored boundary layer suction［J］. Journal of Turbomachinery，2008，130(1)：011004.1-011004.8
