What should I do if the pump motor does not rotate for a long time?

The buzzing of the water pump and the motor does not rotate, first of all, you can judge from the "buzzing" sound whether the power supply is out of phase or the pump or the motor is stuck. The "hum" sound of the power supply is relatively loud and a little hoarse, accompanied by vibrations. If the pump or motor is stuck, the "buzz" sound is relatively small and brittle.

If you can't judge from the sound, in line with the principle of simple maintenance.

1.Without starting the pump, use a multimeter.

The AC voltage level measures whether the three-phase power supply at the input end of the contactor is normal. If the power supply is normal, then use the multimeter ohmic gear in the thermal relay.

The output measures the resistance of the stator coil of the motor. Suppose a phase is measured to be open. That is, if the line is disconnected, the next step of inspection will be carried out.

2.Open the motor junction box cover, or use a multimeter to measure the three-phase resistance on the motor binding post. In this way, it is judged whether the wire is broken or there is an open circuit in the internal coil of the motor.

3.When the above checks are normal, open the motor fan cover. Coiled the fan blades to see if the motor shaft can rotate. Do not rotate and further check whether the impeller of the pump is stuck and whether the motor is stuck.

After these steps, the inspection will generally find the fault point.

In this case, if it is a three-phase pump, it should be that the power supply is out of phase, or it is possible that the impeller is stuck, and it is possible to use a hand or a screwdriver.

Take a turn to see if the rotation is normal, if it is a single-phase water pump, it may also be stuck, and the other possibility is that the capacitor is broken. It is easy to find the cause of this kind of failure, manually turn the car, measure the power supply, and basically judge the problem.

1. The impeller is stuck: In this case, it is possible that it is stuck by foreign bodies, at this time, it is only necessary to remove the foreign matter on the circulating pump, and then add some lubricant.

2. Motor damage: Once such a situation occurs, then you can only replace a new motor.

3. Cavitation: Due to the large pipe resistance at the inlet of the circulating pump, it is very easy to produce cavitation, and the pump body will vibrate, and the inside of the pump body needs to be cleaned at this time.

To sum up, it is about how to deal with the circulating pump without turning, I believe that after reading the above content, the next time you encounter such a situation, you can also solve it according to the above methods.

Dismantle! Disassemble and clean the rotor shaft bearing. If the bearing is corroded, it must be replaced. The impeller and rotor shaft are cleaned with oil and sandpaper.

If the water pump has not been used for a long time, the first thing to check is whether the motor and circuit are normal. Then the pump should be dismantled to check the bearing, re-replace the butter, and take out the old stalk and replace it with a new stalk.

Then you can use your hand to move whether it is normal. At the same time, the gasket should be replaced to prevent air leakage.

That's because the rust is dead, you have to disassemble and remove the rust, or it may be that the line is aging for a long time, and then check and check the line.

After the pump is energized, there is only a hum but no turn fault analysis is as follows: if it is a single-phase pump motor, then the fault may be that the starting capacitor is broken, the contact is poor, or the starting winding is burned out If it is a three-phase water pump, the fault may be a lack of phase, low voltage, poor line contact, short circuit inside the winding, etc. So it is recommended to find a professional electrician or.

In this case, it is also possible that the motor is rusty, so you should check it carefully to see if it is due to the problem of the power supply or the rust caused by rust.

If the pump motor is not used for a long time, it is necessary to test whether the insulation of the pump is qualified, and if the insulation is unqualified, it must be rewound to the motor.

If the pressure switch is broken, it will automatically stop when the pressure is enough, and if it is broken, it will not stop. Or the check valve of the pump body fails, it can not effectively prevent the water from backflowing, so that the pressure of the water cannot reach the pressure it set, and it will keep turning. It could also be a leak from the check valve.

The function of the check valve is to make the water pressure that has been increased and pressed in the early reed not to block the belt and then return to lead to the pressure drop, if the check valve is not well sealed, resulting in water leakage, it will never reach the set upper limit, and it will also lead to the pump not stopping.

The electric water pump does not work because the water inlet and outlet are exposed, the inlet and outlet pipes are leaking, the liquid is problematic, and the cooling pool is too tightly sealed. It is best to carry out comprehensive maintenance of the car water pump for 60,000 kilometers, and it is the most appropriate time to replace the water pump at this time. Of course, not only the pump needs to be replaced, but also the belt and tensioner, the oil filter and antifreeze need to be replaced.

In the automobile engine, there will be a water channel for cooling water circulation in the car cylinder block, it will be placed in front of the car radiator is the well-known water tank, the connection required here is carried out through the water pipe, so as to form a water circulation system, and in the upper water outlet of the engine, there will be a car water pump, driven by the fan skin, and then pump out the hot water in the engine block waterway, and pump the cold water into the waterway of the cylinder block.

Of course, there is also a thermostat next to the water pump, when the car just starts, do not open, so that the cooling water will not pass through the water tank, just circulate in the engine, when the temperature of the engine enters more than 80 degrees, it will be opened, so that the hot water in the engine will be pumped into the water tank, of course, the cold wind will blow through the water tank when the car is moving forward, so that the corresponding heat can be taken away.

Photo by Chen Fang1) @2019

Summary. The motor is no problem, the pump head can't rotate What's going on Hello dear, the household water pump doesn't rotate, but the motor has a reason for energizing: a:

There was a buzzing sound inside, but it didn't turn and it didn't freeze. It is likely that the starting capacitor is broken, and the capacitor can be measured with a universal meter. Two:

If the motor is sure that there is electricity, check whether there is a low voltage or phase loss (three-phase motor). These conditions will also cause the motor to not rotate, or the speed is low (easily stuck), so it should be measured with a universal meter. Three:

You can smell whether there is a burning smell, it may be a short circuit between the motor windings. The bearing should be difficult to break, it is recommended to find a repair yourself may not be good. If you want to replace the capacitor, it is best to use a capacitor with the same parameters as the original configuration.

If the capacitor is damaged, and you don't know or can't see the labeled parameters clearly, you can calculate and choose according to the following formula: c=8js(f) formula, c-the capacitance used, the unit is micromethod (f); J-motor starting winding current density, generally selected 5 7A (mm)2;s-Boot winding wire cross-sectional area (mm2). Generally, it can be selected according to 1000W 40 F.

The motor is fine, but the pump head doesn't rotate.

The motor is no problem, the pump head can't rotate, what's going on, hello dear, the household water pump doesn't rotate, but the motor has a reason for energizing: one: there is a sound of humming Ling Chi inside, but it can't rotate and it is not stuck.

It is likely that the starting capacitor is broken, and the capacitor can be measured with a universal meter. 2: If the electric machine is determined to have electricity, check whether there is a low voltage or phase break (three-phase motor).

These conditions will also cause the motor to not rotate, or the speed of rotation is low (easy to get stuck), so it should be measured with a universal meter. Three: You can smell whether there is a burning smell, it may be a short circuit between the motor windings.

The bearing should be difficult to break, it is recommended to find a repair yourself may not be good. If you want to replace the capacitor, it is best to use a capacitor with the same parameters as the original configuration. If the capacitor is damaged, and you don't know or can't see the annotated parameters clearly, you can calculate the option according to the following formula:

c=8js( f) where c - the capacitance of the distribution, the unit is micromethod (f); J-motor starting winding current density, generally selected 5 7A (mm)2;s-Boot winding wire cross-sectional area (mm2). Generally, it can be selected according to 1000W 40 F. Hope it helps.

It's an air pump. 1. Problems caused by cavitation in circulating pumps: The main reasons for cavitation in the pump are large resistance of the pump inlet pipe, more vapor phase of the conveying medium, insufficient irrigation pump, insufficient pump inlet energy and other reasons.

Cavitation is the most harmful to the pump, when cavitation occurs, the pump vibrates violently, the balance is seriously damaged, and the attitude will cause damage to the pump bearing, rotor or impeller. This is a common cause of magnetic pump failure. Hope it helps.