发电厂锅炉引风机防磨与振动处理.doc

发电厂锅炉引风机防磨与振动处理 专 业 作者姓名 指导教师 定稿日期： 摘 要 火电厂中使用的主要风机有引风机、排粉机和鼓风机等。其中引风机和排粉机作为电厂的主要辅机之一，因为磨损而严重影响其出力并带来频繁的更新维修，已成为火力发电厂锅炉安全运行的隐患之一。多年来，虽然使用过许多表面强化方法，包括表面堆焊耐磨材料、热喷涂喷焊、表面涂覆各种高分子涂料、表面淬火等，效果均不十分理想。针对耐磨胶粘剂主要是利用胶粘剂高粘接强度粘接耐磨颗粒材料，由耐磨材料提供抗磨力的特点，考虑利用胶粘剂粘接耐磨陶瓷用于风机叶轮的耐磨防磨。该项技术先后在几十台引、排粉风机叶轮上得到应用，最长使用时间已达到3年以上，取得了较好的经济效益。随着科技的进步，火力发电厂的单机装机容量也越来越大，而引风机作为火力发电厂不可缺少的一部分，其运行状况的好坏直接关系到火力发电厂的经济效益。文章对造成火力发电厂引风机振动故障的原因及其基本特征进行了分析，介绍了如何运用这些振动故障的基本特征对引风机常见振动故障进行简易诊断，判断振动故障产生的根源。 关键词：风机；磨损；陶瓷叶轮引风机振动；故障分析 Abstract In the article, the main fan has used the machine and induced fan, etc. Among the draft and the main auxiliary machine as power, because wear one serious influence its output and frequent updates maintenance, has become the coal-fired power plant boiler operation safety of the hidden trouble. For many years, although use many surface strengthening methods, including surface heat resistant materials, buttering welding and surface spraying coated with various polymer coating, surface hardening, etc, are not very ideal effect. According to wear adhesive was mainly used for high adhesive bonding strength adhesive wear particle materials, wear-resistant materials provided by the anti-wear force, consider using adhesive used for fan wear-resisting ceramics impeller wear-resisting mill. The technology successively in tens, exhaust fan is applied on the impeller powder, and the longest time has reached 3 years, and have achieved good economic benefit. With the progress of science and technology, coal-fired power plants installed capacity of single increasing, and induced as an indispensable part of thermal power plant, the operation condition of leakproofness is directly related to the economic benefits. The draft for coal-fired power plants vibration fault reason and its basic characteristics are analyzed, and introduces how to apply the basic characteristics of the vibration fault of induced vibration fault diagnosis of common simple, the root causes of vibrat