电机拆装实训（Motor assembly and disassembly training）.doc

电机拆装实训（Motor assembly and disassembly training） Disassembly and repair of motor First, the definition and classification of motor 1, the motor is based on electromagnetic induction principle, the electrical energy into mechanical energy, and output mechanical torque prime mover. 2, classification: Two, motor common fault analysis and judgment The common faults of motor are mainly divided into two categories: mechanical and electrical faults. Current division Direct Communication synchronization asynchronous Single-phase Three-phase Winding type Squirrel cage 3, motor structure: mainly divided into stator and rotor. Mechanical faults mainly include bearing, fan, end cover, rotating shaft, casing and so on. Electrical faults mainly include stator winding, rotor winding and circuit fault. The electrician can see through his own senses to see if the motor is in normal condition - - look, listen, touch, smell and ask. Three 、 motor disassembly Taking the disassembly of small power three-phase cage motor as an example, the removal methods and steps of the motor are introduced. 1. preparation before disassembly (1) common tools such as electrical tools and tools for disassembly are prepared. (2) access to and record the type, appearance and main technical parameters of the dismantled motor. (3) mark the end covers, shafts, screws, connecting posts and so on. 2. disassembly step (1) remove the hood of the tail of the motor. (2) remove the fan blade at the rear of the motor. (3) remove the fastening screws for the front bearing outer cover and front and rear end covers. (4) with wood (copper, lead or pad) in the front end of the rotary shaft, the rotor and the back cover with a hammer from the base type, can be directly on the front end of a rotating shaft of wood hammer. (5) take out the rotor from the stator. (6) with a stick into the stator core to the inner side of the front end, with a hammer to knock off the front cover frame. Finally, pull down the bearing and bearing