风机振动原因分析及处理方法探讨 鲁素萍1，李慧琴2（1.内蒙古包头钢铁

Fan vibration analysis and treatment methods <br>Lu Suping 1, Li Huiqin 2 <br>(1. Inner Mongolia Baotou Iron and Steel Vocational and Technical College, Inner Mongolia Baotou 014010; <br>2, Inner Mongolia Baosteel Steel Union Co., Ltd. Ironmaking Plant, Baotou Inner Mongolia 014010) <br><br>Abstract: Yes The causes of fan vibration were comprehensively analyzed. Factors that may cause fan vibration were analyzed from the aspects of equipment, process and maintenance, and various preventive measures were proposed to improve the operation status of the fan, solve the problem of fan vibration, and extend the service life of the fan. Knowing the reasons for the vibration of the fan, you can grasp the lifeblood of its safe operation. 【1】<br>Keywords: fan, vibration, dynamic balance <br>CLC number: Document identification code: Article number: <br> <br>Overview of the <br>application of fans in many fields, and during the use of the fan, due to various reasons, the vibration of the fan is increased, resulting in The final damage will cause serious equipment accidents, which will have a great impact on the safety management, production organization and efficiency of the enterprise. The sintering exhaust fan is the key equipment of the sintering plant. The operation status of the fan is monitored in a timely manner. Accurately discover, diagnose, and troubleshoot. Abnormal vibration is the most significant manifestation of the hidden danger of the fan, and also a harbinger of accidents. Therefore, grasping the vibration of the fan, it also grasps the lifeblood of its safe operation. <br>1. The reason of fan vibration <br>Generally speaking, the vibration of the fan is inevitable during operation. Especially in the late stage of the fan operation, due to the deterioration of various parameters, the vibration of the fan is increased, which requires us to fault before the condition of the fan further deteriorates Solve to ensure the normal operation of the fan. <br>1.1. <br>Analysis of the cause of the failure of the fan vibration. The fan failure phenomenon and cause are analyzed according to its rules. Generally speaking, there are the following types:<br>(1) Design reason: The design of the fan is generally designed according to the use environment, temperature, air volume, wind pressure, medium, etc. of the fan, and some companies have not selected the model completely based on these factors, resulting in the following factors: Improper fan design, poor dynamic characteristics, vibration during operation; unreasonable structure, stress concentration; design work speed close to or falling into the critical speed area; inaccurate calculation of thermal expansion, resulting in poor thermal alignment [1]. <br>(2) Manufacturing reasons: The quality requirements of the fan manufacturer for the fan also affect the operation of the fan, such as: poor processing of parts and components, insufficient accuracy; poor quality of parts, insufficient strength, manufacturing defects; rotor dynamic balance does not meet technical requirements, etc. [ 1】. <br>(3) Installation and maintenance reasons: The installation accuracy requirements of the fan play a vital role in the operation of the fan. If the installation accuracy does not meet the installation requirements, it will play a destructive role in the operation of the fan. During the fan installation process, there are the following influencing factors, such as: improper mechanical installation, misaligned parts, large preload; poor alignment of the shaft system; improper adjustment of machine geometric parameters (such as fit clearance, interference and relative position); Improper placement of the rotor for a long time changes the accuracy of the dynamic balance; failure to repair according to the regulations destroys the original matching nature and accuracy of the machine [1]. <br>The installation standard is: the limit deviation of the longitudinal and transverse centerlines of the exhaust fan is plus or minus 2mm. The limit deviation of the height of the exhaust fan is plus or minus 2mm. The level tolerance of the exhaust fan is 0.2/1000. The limit deviation of base elevation is plus or minus 2mm. The limit deviation of the longitudinal and transverse centerlines of the base is plus or minus 2mm. The limit deviation of the center distance between the two bases is plus or minus 2mm. The upper surfaces of the two bases should be on the same level, and the height difference should not be greater than 0.5mm. The horizontal horizontal tolerance of the base is 0.2/1000; the vertical horizontal tolerance is 0.1/1000. <br>(4) Reasons for operation and operation: During the use of the fan, the maintenance and repair of the fan play a decisive role in the operation quality of the fan. Such as: process parameters (such as temperature, pressure, flow, load, etc.) deviate from the design value, and the machine operating conditions are abnormal; the machine operates under overspeed and overload, which changes the working characteristics of the machine; poor lubrication or cooling; The rotor is partially damaged or fouled; improper operation during start-stop or speed-up and speed-down, uneven thermal expansion, or excessive residence time in the critical zone, etc. [1].<br>(5) Reasons for machine deterioration: General equipment has a certain period of time when used, and the performance of the equipment will deteriorate when it reaches a certain period. The same is true for fans, such as: long-term operation, rotor deflection increases or dynamic balance deteriorates; local rotor damage, shedding, or cracks; parts wear, pitting, or corrosion, etc.; the mating surface is deteriorated, resulting in insufficient interference Or loose, etc., destroying the nature and accuracy of the fit; uneven foundation settlement of the machine, deformation of the machine shell [1].

Analysis of the causes of fan vibration and the method of treatment<br> Lu Suping 1, Li Huiqin 2<br>(1. Inner Mongolia Baotou Iron and Steel Vocational and Technical College, Inner Mongolia Baotou 014010;<br>2, Inner Mongolia Baosteel Co., Ltd. ironmaking plant, Inner Mongolia Baotou 014010)<br><br>Abstract: A comprehensive analysis of the causes of fan vibration, from the equipment, process and maintenance aspects of the factors that may cause fan vibration, put forward a variety of preventive measures, improve the operation of the fan, solve the problem of fan vibration, extend the life of the fan. Understanding the vibration causes of the fan is the lifeblood of its safe operation. 【1】<br>Keywords: Fan, Vibration, Dynamic Balance<br>Medium classification number: Document identification code: article number:<br> <br>Overview<br> Fan application in many areas, and fan in the process of use, due to various reasons, caused by fan vibration intensified, resulting in eventual damage, serious will also cause major equipment accidents, to the enterprise's safety management, production organization and benefits, etc. have a greater impact, sintering fan is the key equipment of sintering plant, the operation of the fan monitoring, can be timely and accurate discovery, diagnosis and troubleshooting. Abnormal vibration is the most significant manifestation of fan hazard and a precursor to accident. Therefore, to master the vibration of the fan, it also grasps its safe operation of the lifeblood.<br>1, fan vibration reasons<br>Generally speaking, fan vibration in operation is inevitable, especially in the late operation of the fan, due to the deterioration of various parameters, resulting in the increase of fan vibration, which requires us to further deteriorate the condition of the fan will solve the problem, to ensure the normal operation of the fan. <br>1.1, cause of failure caused by fan vibration<br>Analysis of fan failure phenomenon and causes, there are rules to follow, generally speaking, there are the following:<br>(1) Design reasons: fan design is generally based on the use of fan environment, temperature, air volume, wind pressure, medium, etc. to design, and some enterprises do not completely according to these factors to select the type, resulting in the existence of the following factors: improper design of the fan, poor dynamic characteristics, operation vibration;<br>(2) Manufacturing reasons: fan manufacturers on the quality requirements of the fan also affect the operation of the fan, such as: parts processing and manufacturing, accuracy is not enough;<br> (3) Installation, maintenance reasons: fan installation accuracy requirements for fan operation plays a vital role, such as installation accuracy does not meet the installation requirements, the operation of the fan will play a destructive role. In the wind turbine installation process, there are the following factors, such as: improper mechanical installation, parts misalignment, large preload, shaft system alignment, machine geometry parameters (such as mating clearance, excess profit and relative position) improper adjustment, rotor long-term improper placement, changed the dynamic balance accuracy, not according to the procedures of maintenance, destroyed the original machine fit nature and accuracy, etc.<br>The installation standard is: the vertical and horizontal center line limit deviation of the fan is plus or minus 2mm. The deviation of the fan's elevation limit is plus or minus 2mm. The fan level tolerance is 0.2/1000. The base elevation limit deviation is plus or minus 2mm. The vertical and horizontal centerline limit deviation of the base is plus or minus 2mm. The center distance limit deviation of the two bases is plus or minus 2mm. The surface of the two bases should be on the same horizontal surface, the difference between high and low should not be greater than 0.5mm. The horizontal horizontal tolerance for the base is 0.2/1000 and the longitudinal horizontal tolerance is 0.1/1000.<br>(4) Operating reasons: in the process of fan use, the fan maintenance, maintenance of good or bad, the running quality of the fan plays a decisive role. Such as: process parameters (such as the temperature of the media, pressure, flow, load, etc.) deviate from the design value, the operation of the machine is not normal, the machine in the over-speed, overload, change the working characteristics of the machine, lubrication or cooling is poor, rotor local damage or fouling, start-down or lift speed process operation is not proper, thermal expansion is uneven or stay in the critical area for a long time.<br>(5) The reason for the deterioration of the machine: the general equipment in use has a certain number of years, to reach a certain number of years equipment performance will deteriorate. The same is true for fans, such as: long-term operation, rotor deflection increase or change balance deterioration, rotor local damage, shedding or cracking, component wear, pitting or corrosion, etc., mating surface underperformance, resulting in insufficient profit or loosening, etc., destroying the nature and precision of the machine base settlement, machine shell deformation 1.

Cause analysis and treatment of fan vibration<br>Lu Suping 1, Li Huiqin 2<br>(1) Inner Mongolia Baotou Iron and steel vocational and technical college, Inner Mongolia Baotou 014010;<br>2. Iron making plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou, Inner Mongolia 014010)<br>Abstract: This paper comprehensively analyzes the causes of fan vibration, analyzes the factors that may lead to fan vibration from the aspects of equipment, technology and maintenance, and puts forward a variety of preventive measures to improve the working condition of the fan, solve the vibration problem of the fan, and prolong the service life of the fan. To understand the cause of vibration of the fan, we can grasp the lifeblood of its safe operation. 【1】<br>Key words: fan, vibration, dynamic balance<br>CLC No.: document identification code: Article No<br>summary<br>Fan is used in many fields, and in the process of using, due to various reasons, the vibration of the fan intensifies, resulting in final damage, and even serious equipment accidents, which has a great impact on the safety management, production organization and efficiency of the enterprise. Sintering exhaust fan is the key equipment of sintering plant, and the operation status of the fan can be monitored timely and accurately Identify, diagnose and correct the faults. Abnormal vibration is the most significant manifestation of fan hidden danger and the precursor of accident. Therefore, to master the vibration of the fan is the lifeblood of its safe operation.<br>1. Causes of fan vibration<br>Generally speaking, the vibration of the fan in operation is inevitable, especially in the later stage of the fan operation, due to the deterioration of various parameters, the fan vibration is intensified, which requires us to solve the fault before the further deterioration of the fan condition to ensure the normal operation of the fan.<br>1.1 fault causes of fan vibration<br>In general, there are the following types of fan failure analysis: 1<br>(1) Design reasons: fan design is generally based on the use of the environment, temperature, air volume, air pressure, medium, and so on, but some enterprises have not completely based on these factors, resulting in the following factors: improper design of the fan, poor dynamic characteristics, vibration during operation; unreasonable structure, stress concentration; design speed close or fall In the critical speed region; the calculation of thermal expansion is inaccurate, resulting in poor thermal alignment.<br>(2) Manufacturing reasons: the fan manufacturer's quality requirements on the fan also affect the operation of the fan, such as: poor manufacturing of parts and components, insufficient precision; poor material, strength and manufacturing defects of parts; rotor dynamic balance does not meet the technical requirements, etc.<br>(3) Reasons for installation and maintenance: the installation accuracy requirements of the fan play an important role in the operation of the fan. If the installation accuracy fails to meet the installation requirements, it will damage the operation of the fan. In the process of fan installation, there are the following influencing factors, such as: improper mechanical installation, parts dislocation, large preload; poor alignment of shafting; improper adjustment of machine geometric parameters (such as fit clearance, interference and relative position); improper placement of rotor for a long time, which changes the accuracy of dynamic balance; failure to carry out maintenance according to regulations damages the original matching nature and accuracy of the machine.<br>The installation standard is: the limit deviation of the longitudinal and transverse center lines of the exhaust fan is ± 2mm. The elevation limit deviation of exhaust fan is ± 2mm. The levelness tolerance of exhaust fan is 0.2/1000. The limit deviation of base elevation is ± 2mm. The limit deviation of longitudinal and transverse center line of the base is ± 2mm. The limit deviation of the center distance between the two bases is plus or minus 2mm. The upper surface of the two bases shall be on the same horizontal plane, and the height difference shall not be greater than 0.5mm. The horizontal levelness tolerance of the base is 0.2/1000 and the longitudinal levelness tolerance is 0.1/1000.<br>(4) Reasons for operation and operation: in the process of using the fan, the maintenance of the fan plays a decisive role in the operation quality of the fan. For example: the process parameters (such as medium temperature, pressure, flow, load, etc.) deviate from the design value, the machine operation condition is abnormal; the machine operates under the over speed and overload conditions, which changes the working characteristics of the machine; poor lubrication or cooling; local damage or scaling of the rotor; improper operation in the start-up and shutdown or speed up and down process, uneven thermal expansion or long stay in the critical area, etc 【1】。<br>(5) Reasons for machine deterioration: the general equipment has a certain number of years in use, and the performance of the equipment will deteriorate when reaching a certain number of years. The same is true for fans, such as: long-term operation, the rotor deflection increases or the dynamic balance deteriorates; the rotor is locally damaged, detached or cracked; parts are worn, pitted or corroded; the stress on the mating surface is deteriorated, resulting in insufficient interference or looseness, which destroys the matching property and accuracy; the machine foundation settlement is uneven, and the machine shell is deformed [1].<br>