How to check the vibration fault of the oil pump motor? The Dalan oil pump motor manufacturer tells you that you can refer to the following steps for maintenance: 1. Visual inspection 1 When the motor is running, use the vibrometer to check the vibration value of each part. For areas with high vibration, test and record in detail in vertical and horizontal directions. 2 If the anchor bolt is loose or the bearing screw is loose, it can be directly tightened, and then the vibration value is re-tested after tightening to see if it is eliminated or lightened. 3 Check whether the three-phase power supply is balanced, whether the three-phase fuse is blown, and if there is a problem with the power supply, stop it in time and contact the relevant department to solve it. 2. Inspection of the joint part 1 If the load machine and the motor itself are checked, if they are normal, the cause of the motor vibration is caused by the joint. At this time, check the basic level, inclination and strength of the motor. 2 Check whether the center is normal, whether the coupling itself is balanced, and whether the connection gap is uniform and correct. Whether the opening of the coupling is correct, etc. Generally, it should be the lower opening, that is, the axial clearance of the lower part of the coupling is larger than the axial clearance of the upper part. 3, stand-alone experiment 1 If the motor vibration can not be solved from the external surface, you need to disconnect the power supply, disassemble the coupling, separate the motor from the connected load, and test the motor separately. 2 If the motor itself does not vibrate, the vibration source is caused by the installation of the coupling and the load mechanism. 3 If the motor itself vibrates, it is inherently defective, and the coupling and the load machine may have little problem. 4 The instantaneous power failure method is used to distinguish whether it is an electrical cause or a mechanical cause, or is caused by a mixture of the two. When the power is turned off, the vibration of the motor is immediately weakened or lightened, indicating that the electrical cause is dominant. Otherwise, the possibility of mechanical reasons is high. 4. Inspection of electrical reasons 1 Test whether the resistance of the three-phase winding of the stator is balanced. If it is unbalanced, it indicates that there is a welded part. 2 Check the winding ground fault with a solid lamp. The motor is then disassembled, the rotor is withdrawn, and the cage rotor is used to check for cage breaks. 3 The inter-turn short-circuit fault of the stator winding can be judged by observing the burnt marks on the insulation surface of the winding. It can also be checked by slot transformer. 5. Inspection of mechanical causes 1 Regarding vibration and noise caused by mechanical causes, it is first necessary to detect whether the air gap of the motor is uniform. 2 Check the bearing, clean it after removal, measure the radial clearance, and the gap size should not exceed the specified. 3 Check the stator core deformation and loose fitting. The loose iron core can be bonded with epoxy resin, and the looseness between the sheets needs to be re-pressed. 4 Check if the shaft is bent, and if necessary, check the rotor core and do the balance test. ----- Responsible Editor: Dalan Oil Pump Motor 02- Purchasing Consultant Copyright http:/(Dalan Motor) Reprint, please indicate the source http://news.chinawj.com.cn

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