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The motor (Motor) is a device that converts electrical energy into mechanical energy. It is through the electric coil (i.e. stator winding) and produce a rotating magnetic field acting on the rotor (such as the squirrel cage closed aluminum frame) formed magnetoelectric rotary torque. Well, what are the factors that affect the service life of the motor, and the following Xiaobian will introduce some of the factors that may affect you.
1, the quality of the motor itself is not qualified
(1) there are many manufacturers of motors in China, and the quality of motor produced is also uneven. Some manufacturers in order to save materials, reduce the cost of production, the motor winding coil section is insufficient, the insulation level is not up to the material, the heating of the motor when in normal use, cause the insulation aging rapidly, and finally to the breakdown of interturn insulation, electrical burn.
(2) when the motor is checked and repaired, the maintenance personnel should choose copper wires or various insulating materials of low quality, which will lead to the decrease of the quality of the overhaul of the motor. The common conditions are as follows: (1) the insulation materials are not of enough grade. For example: use bamboo wedge instead of epoxy resin slot wedge...... The quality of oil seal is inferior. Bearing quality is not qualified. The impregnating process is not advanced and the insulation is not up to standard. The connection of the motor is not tight, the welding is not firm, and the connection section is not enough.
2, the motor running environment can not meet the requirements
(2) the motor work in a humid environment, because the underground drenching water, motor damp, especially in fully mechanized coal mining and fully mechanized excavation face of spare motor, due to a long time, moisture insulation performance after its power will be greatly reduced, grounding or short circuit to burn out the motor winding.
(3) the motor works in the poorly ventilated environment. Because of poor ventilation or buried in the half, it will cause bad cooling of the motor or damage of the blade, and burn out the motor.
(4) the water cooling motor will not work in the condition of no cooling or half cooling because of no water supply or little water flow. The workers can not find it in time, and the motor temperature will soon exceed the standard.
3, the installation of motors can not meet the requirements
(1) the connection between the motor and the terminal is not enough when the connection is made in the well, and the heat is generated at the time of operation, and the inter turn insulation of the motor terminal or the same place is burned out.
(2) motor installed in coaxial with the driven equipment can not meet the design requirements or anchor bolt is not tight, vibration when the motor is running, the motor rotor shaft bearing radial load, fatigue failure or reduce bearing life.
The above is the factors that may influence the service life of the motor, of course, this is just one of several points, there are many factors that may affect the service life of the motor, such as motor maintenance and so on, in order to prolong the service life of the motor, or according to their actual situation and the environment to select the appropriate motor, in use process strictly in accordance with the maintenance system enforced, so naturally, the service life of the motor will be extended.
