Fountain submersible pump is composed of asynchronous motors and pumps, widely used in agricultural irrigation and drainage and industrial water supply industry. There are dry, oil-immersed, water-cooled, and several other. As the pump into the water long-term work, coupled with poor water quality in some areas, poor quality of the power grid, maintenance, lack of experience, so a higher failure rate, maintenance is also large.
First, the fountain submersible pump common faults
1, leakage
Leakage is the most common failure of the fountain submersible pump, but also one of the most dangerous factors endangering personal safety. Symptom To close the knife, the transformer in the distribution room of the leakage protector will trip (if there is no leakage protector will be very dangerous, will cause the motor burned). This is mainly due to fountain submersible pump pump body water, resulting in fountain submersible pump motor winding insulation resistance decreases, resulting in protector action. At this point with a shake table or multimeter R × 10kΩ block, measuring the motor windings have a certain leakage resistance of the shell. Pump long-term use, resulting in serious mechanical seal face wear, water infiltration, wetting the motor winding to form leakage. Can be removed fountain submersible pump motor on the drying room, or 100-200W incandescent bulb drying; measuring insulation resistance infinity, and then replace the mechanical seal, and then pump can be put into use.
2, oil spills
Fountain submersible pump oil leakage is mainly due to severe sealing box, resulting in sealed box oil chamber leakage or outlet box sealed bad.
Sealed box oil chamber oil spills, visible in the water section at the oil traces. In the water section there is a filling hole, unscrew the screw, observe the oil chamber is water. If the oil chamber into the water, it is sealed bad, should replace the sealed box to prevent the oil chamber serious water infiltration into the motor. If the fountain submersible pump cable has the phenomenon of oil at the root, are motor oil leakage. Seal is generally poor sealing plugs or re-winding of the motor caused by the use of lead failure; some of the water pump wiring board rupture caused. Check to determine, for qualified new products can be. And measure the degree of insulation of the motor, if the insulation is not good should be promptly treated, while the oil inside the motor.
3, power, the impeller does not turn
Electric pump buzzing after the exchange of sound, the impeller does not turn. Cut off the power, dial the impeller at the water inlet, if the dial does not move, indicating the rotor was stuck. If the rotor impeller, but the impeller does not turn after power, the fault may be due to serious wear and tear, power is generated when the stator magnetic rotor will be sucked while the rotor is not the rotor, Can not turn. Replace the bearing assembly pump, toggle impeller flexibility, troubleshooting.
4, pump water is weak, small flow
Remove the pump, check the rotor rotation is flexible, power rotor can turn. Open the pump found that the pump shaft and bearing between the lower end of the loose, and the rotor down, so the rotor is unable to turn, the output power is small. Use the appropriate gasket pad between the rotor and the bearing, so that the rotor move, install the test machine, the fault can be ruled out.
Second, fountain submersible pump maintenance matters needing attention
1, the demolition method to be correct
Before the demolition, in the front and rear cover and the base of the joints with a chisel marked. Because the motor at the factory assembly is quite reasonable, if not repaired as is after assembly, may cause a slight error caused by the shaft is not flexible. Remove the winding to carefully observe the extent of the burned, a preliminary analysis of the causes of burn, pay attention to a slight sweep chamber, ball breakage and other easy to see the fault. In the demolition of bad windings, we should pay attention to protect the core and plastic retaining ring. If the method is not suitable, it may cause the iron core to rise and disability. When the motor is electrified, the electromagnetic effect may be generated, which will cause the core vibration and the winding itself vibration, which will lead to the insulation damage of the insulation paper and the electromagnetic wire. The removal method is to use a diagonal pliers cut from one end, the other end with pliers out.
2, self-made line mode should be appropriate, embedded line to be correct
To embed a good phase, and then embedded in another phase, so that the end of the formation of three-plane, the end must be bandaged to prevent scratches when assembling.
3, adjust the position of the screw
Adjustment should be carefully, so that the rotor rotation freely, and the minimum no-load current. Then tighten the lock nut.
4, the joints of the waterproof insulation to deal with
Stripped jacket and insulation layer, and remove the copper surface of the paint layer, the oxide layer, after soldering tinning. Then remove the sharp corners, burrs and soldering fluid, with a half-stack with a polyethylene layer 6, and then with nylon tape Polyester half-stack 2 layers, as a mechanical protective layer.
5, power-on preparation before the test
Before testing the motor cavity must be filled with water or anti-rust buffer, the role of cooling the winding and lubricating bearings, or the motor winding will soon burn. Winter when not in use to drain the water within the motor, to prevent cracking of the pump body.
6, fountain submersible pumps to use the regular manufacturers of QYW-type polyethylene insulation nylon sheath water-resistant magnet wire
First, the fountain submersible pump common faults
1, leakage
Leakage is the most common failure of the fountain submersible pump, but also one of the most dangerous factors endangering personal safety. Symptom To close the knife, the transformer in the distribution room of the leakage protector will trip (if there is no leakage protector will be very dangerous, will cause the motor burned). This is mainly due to fountain submersible pump pump body water, resulting in fountain submersible pump motor winding insulation resistance decreases, resulting in protector action. At this point with a shake table or multimeter R × 10kΩ block, measuring the motor windings have a certain leakage resistance of the shell. Pump long-term use, resulting in serious mechanical seal face wear, water infiltration, wetting the motor winding to form leakage. Can be removed fountain submersible pump motor on the drying room, or 100-200W incandescent bulb drying; measuring insulation resistance infinity, and then replace the mechanical seal, and then pump can be put into use.
2, oil spills
Fountain submersible pump oil leakage is mainly due to severe sealing box, resulting in sealed box oil chamber leakage or outlet box sealed bad.
Sealed box oil chamber oil spills, visible in the water section at the oil traces. In the water section there is a filling hole, unscrew the screw, observe the oil chamber is water. If the oil chamber into the water, it is sealed bad, should replace the sealed box to prevent the oil chamber serious water infiltration into the motor. If the fountain submersible pump cable has the phenomenon of oil at the root, are motor oil leakage. Seal is generally poor sealing plugs or re-winding of the motor caused by the use of lead failure; some of the water pump wiring board rupture caused. Check to determine, for qualified new products can be. And measure the degree of insulation of the motor, if the insulation is not good should be promptly treated, while the oil inside the motor.
3, power, the impeller does not turn
Electric pump buzzing after the exchange of sound, the impeller does not turn. Cut off the power, dial the impeller at the water inlet, if the dial does not move, indicating the rotor was stuck. If the rotor impeller, but the impeller does not turn after power, the fault may be due to serious wear and tear, power is generated when the stator magnetic rotor will be sucked while the rotor is not the rotor, Can not turn. Replace the bearing assembly pump, toggle impeller flexibility, troubleshooting.
4, pump water is weak, small flow
Remove the pump, check the rotor rotation is flexible, power rotor can turn. Open the pump found that the pump shaft and bearing between the lower end of the loose, and the rotor down, so the rotor is unable to turn, the output power is small. Use the appropriate gasket pad between the rotor and the bearing, so that the rotor move, install the test machine, the fault can be ruled out.
Second, fountain submersible pump maintenance matters needing attention
1, the demolition method to be correct
Before the demolition, in the front and rear cover and the base of the joints with a chisel marked. Because the motor at the factory assembly is quite reasonable, if not repaired as is after assembly, may cause a slight error caused by the shaft is not flexible. Remove the winding to carefully observe the extent of the burned, a preliminary analysis of the causes of burn, pay attention to a slight sweep chamber, ball breakage and other easy to see the fault. In the demolition of bad windings, we should pay attention to protect the core and plastic retaining ring. If the method is not suitable, it may cause the iron core to rise and disability. When the motor is electrified, the electromagnetic effect may be generated, which will cause the core vibration and the winding itself vibration, which will lead to the insulation damage of the insulation paper and the electromagnetic wire. The removal method is to use a diagonal pliers cut from one end, the other end with pliers out.
2, self-made line mode should be appropriate, embedded line to be correct
To embed a good phase, and then embedded in another phase, so that the end of the formation of three-plane, the end must be bandaged to prevent scratches when assembling.
3, adjust the position of the screw
Adjustment should be carefully, so that the rotor rotation freely, and the minimum no-load current. Then tighten the lock nut.
4, the joints of the waterproof insulation to deal with
Stripped jacket and insulation layer, and remove the copper surface of the paint layer, the oxide layer, after soldering tinning. Then remove the sharp corners, burrs and soldering fluid, with a half-stack with a polyethylene layer 6, and then with nylon tape Polyester half-stack 2 layers, as a mechanical protective layer.
5, power-on preparation before the test
Before testing the motor cavity must be filled with water or anti-rust buffer, the role of cooling the winding and lubricating bearings, or the motor winding will soon burn. Winter when not in use to drain the water within the motor, to prevent cracking of the pump body.
6, fountain submersible pumps to use the regular manufacturers of QYW-type polyethylene insulation nylon sheath water-resistant magnet wire
Manufacturers recommend: Shenlong stainless steel fountain pump
Keywords:Fountain submersible pumps, failure and maintenance, agricultural irrigation and
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