迁钢1580热轧F2异常震动故障的分析研究

发布时间：2019-05-24 03:32

【摘要】：轧机异常振动故障在薄规格板带生产中经常发生,不仅严重影响连续生产的稳定性,且使生产条件恶化,缩短轧机机械、电器及液压等原件寿命。研究如何预测、分析与消除轧机异常振动故障具有重要的理论与实际意义。本文以迁钢1580热连轧生产线为研究对象展开研究。首先介绍了轧机振动故障的研究现状,然后针对迁钢1580热连轧生产线特点展开故障诊断工作。通过测试方案的设计实现了热连轧生产线振动信息采集系统。通过对产品振动信号的测试,完成轧机不同部位水平、垂直振动加速度信号以及传动系统扭振信号的振动信息采集与存储。在采集振动信息的基础上,对这些信号进行时域和频域分析。分析结果显示,轧机水平振动最为剧烈,扭振和水平振动产生了共振。轧机扭振、垂振为受迫振动,激励源自水平振动。抑制水平振动将能够同时抑制垂直振动和主传动扭振。通过振型的分析得出减小轴承座和机架之间的间隙能有效地抑制水平振动的发生。通过调整轴承座和机架之间的间隙的方法进行了抑振实验,结果显示轧机振动得到了较好的抑制。由于轧机频繁换辊,振动信号采集所用的加速度传感器在每次换辊时都要靠人工去重新安装,影响轧线作业率。为了准确预报振动最为剧烈的轧机水平振动情况和设备间隙情况,采用BP神经网络的方法进行了预报,结果显示此方法能有效预测轧机水平振动的加速度和轧机间隙状况,为设备的状态维修提供了参考。
[Abstract]:The abnormal vibration fault of rolling mill often occurs in the production of thin gauge plate and strip, which not only seriously affects the stability of continuous production, but also aggravates the production conditions and shortens the life of mechanical, electrical and hydraulic parts of rolling mill. It is of great theoretical and practical significance to study how to predict, analyze and eliminate the abnormal vibration fault of rolling mill. In this paper, the 1580 hot strip rolling production line of Qianshan Iron and Steel Co., Ltd. is studied. Firstly, the research status of vibration fault of rolling mill is introduced, and then the fault diagnosis work is carried out according to the characteristics of 1580 hot strip production line of Qianshan Iron and Steel Co., Ltd. The vibration information acquisition system of hot strip production line is realized through the design of test scheme. Through the test of the vibration signal of the product, the vibration information collection and storage of the horizontal and vertical vibration acceleration signal and the torsional vibration signal of the transmission system in different parts of the rolling mill are completed. On the basis of collecting vibration information, these signals are analyzed in time domain and frequency domain. The analysis results show that the horizontal vibration of the rolling mill is the most intense, and the torsional vibration and the horizontal vibration produce resonance. Torsional vibration of rolling mill, vertical vibration is forced vibration, excitation comes from horizontal vibration. Suppression of horizontal vibration will be able to suppress both vertical vibration and main drive torsional vibration. Through the analysis of vibration mode, it is concluded that reducing the gap between bearing seat and frame can effectively restrain the occurrence of horizontal vibration. The vibration suppression experiment is carried out by adjusting the gap between the bearing seat and the rack. The results show that the vibration of the rolling mill is well suppressed. Because of the frequent roll change of the rolling mill, the acceleration sensor used in vibration signal acquisition has to be reinstalled manually every time the roll is changed, which affects the rolling line operation rate. In order to accurately predict the horizontal vibration and equipment gap of the rolling mill with the most severe vibration, the BP neural network method is used to predict the horizontal vibration of the rolling mill and the gap of the rolling mill. The results show that this method can effectively predict the acceleration of the horizontal vibration of the rolling mill and the condition of the gap of the rolling mill. It provides a reference for the condition maintenance of the equipment.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TG333;TH165.3

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