大型回转窑支承轴断裂在线诊断技术  

Online diagnosing technique of support shaft crack of large-scale rotary kiln

作　　者：李学军[1] 王梅松[2] 万世红[2] 阳小燕[1] 

机构地区：[1]湖南科技大学振动冲击与诊断研究所,湖南湘潭411201 [2]湖南韶峰水泥集团有限公司,湖南湘潭411423

出　　处：《湘潭矿业学院学报》2003年第1期60-63,共4页Journal of Xiangtan Mining Institute

基　　金：湖南省科技厅制造业信息化示范工程课题(编号:Hnmie A 050);湖南省教育厅科研计划:02C440

摘　　要：针对回转窑载荷和刚度分布复杂、各支承运行中存在偏移,造成支承载荷分配严重不均,使得支承的托轮轴运行中突然断裂,严重影响生产的正常进行,造成重大的经济损失和安全事故的情况,通过分析回转窑托轮轴疲劳断裂过程刚度的变化,提出一种回转窑托轮轴断裂在线诊断方法.该方法采用对托轮基座的振动进行检测与分析,利用托轮轴疲劳断裂过程中刚度和振动信号特征发生较大变化来判别疲劳裂纹的发生、扩展情况.用超低频加速度传感器、电荷放大器、数据采集卡和计算机等组成在线测试系统,对现场回转窑进行振动测试与分析,得出一些有益的分析结论,从而为合理安排窑的维护、检修提供依据.图8,参9.Because of the complexity of load and stiffness distribution of the rotary kiln as well as the support deflection in the operation, the support load will become very uneven, which will probably result to shaft crack of support wheel suddenly when they are working. These faults will impact normal product line seriously and bring large economic losses and safety accidents. In this paper,a novel approach of online diagnosing support wheel shaft crack of the rotary kiln during its operating has been presented by analyzing the stiffness change in the process of support wheel crack. The method gets information from the vibration of base seat of supporting wheel and analyzes them. The crack extending condition and time fatigue life of support wheel can be diagnosed and deduced.Online measurement system is made up of lowfrequency acceleration sensors, charge amplifier, data acquisition board and computer. The measurement system was used in the practice and some helpful analysis results are obtained.That will provide some conferences for technicians to arrange maintenance and repair the rotary kiln reasonably and effectively. It will make good economic benefit.8figs.,9refs.

关 键 词：断裂 在线诊断技术 回转窑 托轮轴 刚度 振动信号 

分 类 号：TQ05[化学工程]