The foundation of the motor must be particularly strong, and the basic design department must account for the foundation itself
The natural vibration frequency prevents resonance when the motor is near the rated speed.
3.1.2 The motor must be installed on the foundation plate or bottom plate. If the foundation plate is used, the foundation bolts can be used to
Fill it with cement while tightening, and the bottom plate can be directly fixed with foundation bolts.
3.2 Installation of generator
3.2.1 If the motor is assembled and shipped out of the factory, the air gap of the motor and the rotation of the rotor must be checked.
No brisk.
3.2.2 If the motor is disassembled, the motor must be assembled as a whole, or the motor needs to be disassembled
When reinstalling, you must first protect the coil from damage. In order to avoid damaging the inner warp of the iron core, it is best to
Pad the inner circle of the stator core with 0.5～0.8mm cardboard, use steel wire rope or add a sleeve on the rotor,
Insert the rotor into the stator core, use jacks on both sides of the rotor shaft extension, (or use
Other supports are padded), and then take out 0.5～0.8mm cardboard, and assemble the front and rear end cover bearings respectively
Install it on both sides of the stator frame and screw on the fixing bolts.
4 Preparation of the generator before starting
4.1 Before starting the motor, the following preparations must be made:
4.1.1 Remove rubbish, dust and stolen goods near the motor.
4.1.2 Carefully remove any objects that may enter the inside of the motor.
4.1.3 Blow the inside of the motor with compressed air at 2 to 3 atmospheres. In order to avoid damage to the winding insulation,
Metal blowpipes should not be used.
4.1.4 Check the grease and brand.
4.1.5 Check the air gap between the stator and rotor with a feeler gauge, and allow the eccentricity to not exceed 10% of the average breath.
4.1.6 Check whether the voltage and frequency meet the values specified on the motor nameplate, and allow short-term voltage
The deviation is ±10%, and the winding temperature can slightly exceed the allowable temperature.
4.1.7 Check whether the motor outlet and power connection are correct, and check whether the phase sequence is correct.
4.1.8 Check protection devices and signal devices (stator temperature measurement, bearing temperature signal, etc.).
4.1.9 Check the winding insulation, use 500 or 1000V high resistance meter to check the insulation of the winding against the base or between phases.
The total number of the old base map is blocked. When the terminal voltage is 1000V and below, the cold insulation resistance of the winding should not be less than 1MΩ. and
The insulation resistance of the rotor of a winding motor should not be lower than 0.5MΩ. If the insulation resistance is not enough, the motor must be dried until the resistance reaches the standard.
5 Drying of the motor
New motors and motors that have not been used for a long time must be dried before starting. It is recommended to use short
Circuit current method or external heating method.