Research on nonlinear horizontal vibration suppression of the hot continuous rolling mill(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2015年06期
- Page:
- 145-151
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Research on nonlinear horizontal vibration suppression of the hot continuous rolling mill
- Author(s):
- LING Qi-hui; YAN Xiao-qiang; ZHANG Yi-fang
- 1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. College of Mechanical and Electric Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China; 3.Maanshan Iron and Steel Co. Ltd. Maanshan 243003, Anhui, China
- Keywords:
- mechanical engineering; hot strip mill; vibration suppression; nonlinear; horizontal vibration; hydraulic cylinder
- PACS:
- TH113.1；TG333.1
- DOI:
- -
- Abstract:
- For a strong horizontal vibration phenomenon in hot strip mill, a method was proposed to suppress the mill horizontal vibration, which added lateral hydraulic cylinder in the side of horizontal direction of the roll system bearing seats according to the field situation, practical mill structure size and technological parameters. Taking the F3 stand whose vibration is the strongest for instance, a differential equation of the rolling mill top work roll vibration which is piecewise nonlinear was established according to the structural characteristics of the rolling mill roll system. The numerical simulation method was adopted to obtain the effective value of vibration acceleration of the system under different oil pressures, and then to find the oil pressure value in the case of minimum vibration acceleration. In order to avoid the occurrence of primary resonance, super-harmonic resonance, sub-harmonic resonance and combined resonance again, the horizontal vibration of the rolling mill was suppressed by selecting the increased lateral hydraulic cylinder oil pressure to improve the horizontal stiffness and damping. Finally the measures were applied to hot continuous rolling mill in the industrial field, and when the hydraulic cylinder oil pressure was regulated to 8.1 MPa, the horizontal vibration acceleration RMS reduced by 75%. So the simulation results and practice both show that this method can effectively restrain the work roll horizontal vibration of hot continuous rolling mill, and provide a reasonable solution to research and inhibition rolling mill vibration.
Last Update: 2015-11-23