XNUMX. Visual inspection:

1. Check the control motor casing and whether there are cracks, open welding, deformation, whether the spare parts enterprises are complete, and whether there is damage.Explosion proofMotorA type of motor that can be used in flammable and explosive plants, and it does not generate sparks during operation.Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.

2. Explosion-proof parts have complete firmware, solid screws and holes with or without sliding buckles.

Rotor inspection: After pulling out the rotor, remove the inner and outer small covers to check whether the rotor is damaged. The rotor cage bar and the end ring are welded firmly and reliably. No welding or virtual welding is required.

Bearing inspection: remove the rear wheel, check for damage, remove the bearing, check for cracks, peeling, pitting, discoloration and more rustExplosion-proof motorsThe relevant information is on the China Explosion-proof Motor Trading Network.

XNUMX. Stator inspection:

1. Clean the stator core and winding surface, and the windings should be insulated, and there should be no obvious damage and development.

As shown in Figure 2, when the windings are all rewinds, the insulation grade winding pitch, etc. should be the same conductor cross-section as the original design.

3. The number of dipping: no less than 3 dipping.

Fifth, the cooling system: Check the water-cooled motor for smooth waterway, good sealing, no leakage, and good pressure test.

Explosion-proof surface inspection: The maintenance of the explosion-proof parts of the explosion-proof motor conforms to the gb3836.2-2000 standard.

XNUMX. Test:

1、绕组的绝缘电阻值：应在低于己与5MΩ（660V，380V），1140V不低于10MΩ。

2、耐压性能试验：380V—2000v/min，660V—2500v/min，1140V—3000v/min。

3. Load test: The three-phase unbalanced load current value does not exceed 10%, and it runs smoothly without abnormal noise.