Motor fault and bearing failure

Motor bearing is to ensure that the motor can be a very important part of the operation of the stability of bearing failure is more common motor failure, occupies very large proportion in all motor fault. Therefore, the choice of bearing and motor installation and maintenance is critical in the model selection and application of the motor. Motor bearing malfunction during the period, usually accompanied by noise, vibration and temperature change, so the maintenance personnel can according to the sight, listening to the sounds, the traditional way, such as hand to touch or offline application equipment, on-line monitoring and contemporary methods to carry out the accurate measurement inspection, timely processing anomalies, achieve the overall goal of fault early warning information, and thus are able to carry out relatively early, to prevent the occurrence of unexpected shutdown and destroyed equipment. A motor bearing failure caused by common cause: 1 motor bearing type selection and wrong operation on the basis of using the working conditions, choose suitable types of bearing, also pay attention to the initial conditions of motor bearing applications. The application of the natural environment, such as: motor motor installation method, the rate of category and the way of slave unit type and interface level, for rotating machinery and equipment of motor bearings have different provisions, applied to the motor model should give consideration to the choice. Pulley drive system, for example, must consider the bearing axial bearing capacity of the problem, and then choose increase bearing or cylindrical roller bearings. 2 motor transport improper storage, installation and the poor in the motor bearing during installation and conversion to keep clean, prevent bearing partial become warped and wounded. Motor transport and store must be in accordance with the relevant standards to prevent vibration impact and erosion. The slave unit ( Such as shafts, pulley, etc. ) Installation and dismantling, avoid violent action, in addition to ensure timely installation. Electrical installation, ensure the neatness of the base surface leveling. Other rules base compressive strength is enough, can bear the motor operation dynamic and static load; Base frequency bypass motor of course 1 and 2 times in the operation frequency, double frequency switch power supply, etc. The actual operating frequency. Motor shaft rotor dynamic balancing is not very good and installation of the poor, will cause the motor vibration, bearing impact and damage increase. Motor factory, motor rotor will be in accordance with the technical standards for the rotor dynamic balance. Generally half a key equilibrium ( H） , the whole key equilibrium ( F) And without key equilibrium ( Linear axis) 。 Installation, make sure of the precision is good, accord with the requirement of the coupling manufacturer. Poor 3 motor bearing RunHua for reusable RunHua bearing, normal maintenance, pay attention to: grease model agree with motor regulation, to prevent the different types of lubrication grease interoperability lubricating grease, appropriate to prevent too little or too much, and immediately remove waste vegetable oil. Filling, maintain the fuel injector cleaning, prevent the dust and dirt into the bearing seal is in good condition, prevent erosion. 4 motor bearing power flow for a large power application of dc variable frequency drives, will because of motor manufacturing or soft starter to the working voltage of the single pulse output, electricity flow through the motor bearings, etching bearing components and lubrication oil, the service life of the bearing were less serious. Therefore proposed to pick equipped with insulation bearing; And standard of EMC on the line, create soft starter motor, load machinery equipment of high frequency in the middle of the equipotential connection. Note: in the motor maintenance and changing bearing, don't destroy the original insulation parts, to ensure excellent insulating layer. Results: motor bearing selection, installation, application and maintenance of the motor poor maintenance, etc. , will cause the motor bearing load, temperature rise, the damage is aggravating, reduced life expectancy, failure to produce early. Machinery and equipment operation and lead to instability or unexpected fault shutdown, harm to production and manufacturing, so should be very important in many advertent, enhance the credibility of the motor operation. Above is the content, the author has given you today want to know more about bearing please focus on bearing website, updated daily bearing different knowledge.