热连轧机非线性水平振动抑制研究  

Research on nonlinear horizontal vibration suppression of the hot continuous rolling mill

作　　者：凌启辉[1,2] 闫晓强[1] 张义方[1,3] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]湖南科技大学机电工程学院,湖南湘潭411201 [3]马鞍山钢铁股份有限公司,安徽马鞍山243003

出　　处：《长安大学学报（自然科学版）》2015年第6期145-151,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金青年项目(51505142)

摘　　要：针对热连轧机发生的强烈水平振动现象,结合现场实际情况、轧机实际结构尺寸及工艺技术参数,提出在辊系轴承座水平方向加侧向液压缸来抑制轧机水平振动的方法。以振动最强烈的F3轧机为例,根据轧机辊系的结构特点,建立轧机上工作辊分段非线性水平振动微分方程。经数值仿真,得出在不同油液压力作用下系统的振动加速度有效值,找到了振动加速度最小情况下的油液压力值。为避免系统再次发生主共振、超谐波共振、亚谐波共振和组合共振等现象,通过增大侧向液压缸油液压力来提高水平方向的刚度和阻尼,抑制轧机水平方向振动。最后将该措施应用于工业现场热连轧机,液压缸油液压力调节到8.1 MPa时,水平振动加速度有效值降低75%。仿真和实践结果均表明,该方法可有效抑制热连轧机工作辊水平振动,为研究和抑制轧机振动提供了合理的解决途径。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.3tabs,8figs,17 refs.

关 键 词：机械工程 热连轧机 振动抑制 非线性 水平振动 液压缸 

分 类 号：TH113.1[机械工程—机械设计及理论] TG333.1[金属学及工艺—金属压力加工]