Low-frequency Resonance of Mold Driven by Oval Gears

LI Xiankui¹  YANG Hongpu^{1, 2}  YANG Ladao³

(1. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004;
2. Center of Technology, Zhengzhou Yutong Heavy Industry Co. Ltd., Zhengzhou 450051;
3. China Heavy Mechinery Research Institute, Xi’an 710032)

Abstract: In production practice, some continuous casters suffer from severe resonance during their starting although the vibration frequency of mold is much lower than the natural frequency of the vibration system. The resonance can cause shake of liquid steel level and, more seriously, even industrial accident such as breakout. In view of this phenomenon, the torsional vibration model of non-sinusoidal oscillation system driven by oval gears is built up. And the dynamics equations are deduced. Low-frequency resonance is discussed. Factors which influence the resonance frequency are considered. A solid foundation for solving the running smooth problem of the mold and for better application of the oscillation device is laid.

Key words: Continuous casting  Mold  Oval gears  Non-sinusoidal oscillation  Low-frequency resonance

CLC No: TF341.6

Received 200770519, received in revised form 20080120

References

[1] LI Xiankui, ZHENG Xueran. Vibration device of zigzag wave for mold: China, ZL98211614.4[P]. 1999-08-18.
[2] ZHANG Xingzhong, LI Xiankui, ZHENG Xueran, et al. Study of non-sinusoidal oscillation of mold driven by ellipse gears[J]. Chinese Journal of Mechanical Engineering, 2004, 40(11): 178-182.
[3] LI Fusheng. Non-circular gear[M]. Beijing: China Machine Press, 1975.
[4] JI Wenmei, FANG Tong, CHEN Songqi. Mechanical
vibration[M]. Beijing: Science Press, 1985.
[5] LI Xiankui, ZHANG Deming. Technology of mold oscillation in continuous casting[M]. Beijing: Metallurgical Industry Press, 2000.
[6] ZOU Huijun, DONG Shimao. Modern design of cam mechanism[M]. Shanghai: Shanghai Jiaotong University Press, 1991.
[7] FAN Y. CHEN. Mechanics and design of cam mechanisms [M]. New York: Pergamon Press, 1982.
[8] TANG Xikuan, JIN Dewen. Dynamics of machinery[M]. Beijing: Higher Education Press, 1983.
[9] KONG Wuguang. High-speed cam[M]. Beijing: Higher Education Press, 1986.
[10] HOMER D. ECKHARDT. Kinematics design of machines and mechanisms [M]. Beijing: China Machine Press, 2002.
[11] LIU Hongzhao, WANG Jianping, YUAN Daning, et al. Dynamic characteristics analysis and resonances research on mold oscillator mechanism for continuous casting[J]. Chinese Journal of Mechanical Engineering, 2002, 38(3): 79-82.