Pumping problems? 250, Pumping Problems?

The pump is good, but it is overloaded, the motor power of the pump: p = GQH (N1N2), N1 - pump efficiency; n2 – motor efficiency. The reason for the overload is that the power of the p motor is too small, the resistance of the pump pipe is too small, and the number of products of the pump flow and head is too large.

To reduce the motor current, it is best to reduce the flow, that is, the valve at the outlet of the pump is properly closed (generally do not need to adjust the water inlet valve, because the suction head is small, and the adjustment range is limited), so that the motor current is within the rated current. In addition, from the point of view of energy saving, the best thing to do is to reduce the speed of the pump, such as frequency conversion control or replacing the pulley (if any).

Closing the small inlet valve will not cause the motor current to rise, but will only decrease.

In addition

1. One of the reasons why the running current of the pump is too high may be that the outlet pipe is long and thick, resulting in a heavier load at the outlet of the pump and an increase in the operating current.

2. The second reason for the high running current of the pump may be that the inlet of the pump is blocked by debris, and the running resistance of the pump increases, which increases the operating current.

3. In addition, it is not excluded that the motor itself is not appropriate, such as the inappropriate configuration of the motor, the poor quality of motor maintenance (rewinding), and the misalignment of the connection between the pump and the motor.

How high is the pool Whether the pipes entering the pool are above or below the water surface.

**Can't see clearly, turn up the protection current a little higher. , why is your voltage so high?

Cause.

1. The air is not filled with water or the air in the inlet pipeline is not pumped clean; The solution for the centrifugal pump to not produce water: continue to fill the water or pump the air in the inlet pipe.

Cause. Second, the head required for the actual working conditions is too high, and the low head of the centrifugal pump cannot meet the requirements of the working conditions; Solution: Replace the pump with a higher head.

Cause. 3. Serious air leakage from the suction pipeline or sealing device; Solution: Plug or repair the air leak, compress or replace the seal.

Cause. Fourth, during on-site installation, the inlet and outlet directions of the pipeline centrifugal pump are reversed or the motor wiring is incorrect, and the rotation direction of the water pump is incorrect; Solution: Swap the inlet and outlet directions, and the motor wiring is incorrect, and replace any two of the wires to change the direction of rotation.

Cause. 5. The speed of the pump is too low; The solution for centrifugal pumps to produce water: increase the speed of the pump.

Cause. 6. The bottom valve is rusted, and the channel of the water inlet or impeller is blocked; Solution: Repair the foot valve, remove debris, and add a trash rack to the water inlet.

Cause. 7. The inlet pipeline is too long, and the suction lift is too large; Solution: Reduce the installation height of the pump, or reduce the elbow valve on the suction line to shorten the pipe length.

Cause. 8. The impeller is seriously damaged, and the gap between the leakage reduction ring is large; Solution: Replace the impeller and leakage reduction ring.

Cause. 9. The impeller nut and key are out of place; Solution: Repair the fastening.

Cause. 10. The installation of the suction pipeline is incorrect, resulting in the presence of air bags in the pipeline; Solution: Modify the suction pipeline.

Cause. Ten. First, the impeller is reversed; Solution: Reinstall the impeller.

Cause. Ten. 2. The inundation depth of the suction nozzle is insufficient, and air is sucked into the pump; Solution: Increase the depth of inundation, or put a wooden board on the surface of the water around the suction pipe.

1. Measure your voltage, the voltage drop may be too large, causing the speed of the motor to drop;

2. Observe the water level in the well, whether the water level has changed;

1. Changes in water levels.

2. The voltage is not available.

3 Whether the motor is filled with water before the pump is launched.

The reasons why the pump cannot pump water are as follows:

1. When the pump is started for the first time, the air in the pump needs to be discharged;

2. Check whether the inlet and outlet valves of the pump are opened, whether the inlet of the pump is sucked with water, whether there is any foreign body blockage in the inlet and outlet pipes of the pump, whether there is a shortage of water at the inlet of the water source of the pump, and if there is a shortage of water, replenishment can solve the problem;

3. For human reasons, some users have damaged the original motor of the pump, and they feel that it is okay to match a motor at will, resulting in a small flow rate of the pump, low head, and even the result that the pump does not use water;

4. After closing the pump valve, the pump pressure can not go up, disassemble the pump body, check whether the impeller in the pump body has the problem of falling off or damaged, if there is such a phenomenon, it is recommended to replace or repair it as soon as possible;

5. Check whether the pump has a reversal problem, sometimes the pump can not be on the water, adjust the pump steering problem can be solved, if the water is controlled by the inverter, it needs to be checked manually or automatically respectively;

6. Due to the burning or loss of magnetism of the motor winding of the water pump, the change of the number of winding turns, wire diameter and wiring method during the maintenance of the motor, or the change of the speed of the electric water pump due to the failure of the motor during maintenance, resulting in the sound of the water pump not being able to get water;

7. The resistance of water flow in and out of the pipeline is too large, and the pump pipeline is too long or there are many curves, resulting in too much resistance of the water flow pipe, although the vertical distance from the outlet to the water source is less than the rated head of the pump, but there will still be the problem that the pump can not lift water or water.

Cause analysis and solutions:

Changzhi 1, the bottom valve of the water pump is stuck, there is silt inside, the high degree of water is too high or leaking, the road is blocked, after checking one by one, you can take measures to repair the bottom valve, take out the blockage, correct steering, clean the impeller and other measures to deal with;

2. The violent vibration of the water pump combined with the unbalance of the electric rotor or the poor coupling, the bearing is worn and bent, the rotating parts are loose, and the broken pipeline support is not firm, which can be adjusted, repaired, reinforced, straightened, replaced and other methods can be taken to deal with them;

3. The installation of the screw cap is not tight, you can tighten the nut by hand, and in serious cases, it must be re-disassembled;

4. If the packing and packaging are too tight and cause overheating, you can take appropriate packing blue cover, clean up the sealing blockage and other measures, and new filler.

1.The impeller rotates unbalanced, the coupling is not tight enough, and the parts are loose and broken, resulting in large vibration of the water pump.

These problems can be solved by means of adjustments, reinforcements, repairs, or replacements.

2.Mostly because the packing is pressed too tightly, the cooling water cannot enter the packing, or the shaft surface is damaged. Measures such as appropriately relaxing the packing and cleaning up the sealing tube can be taken.

Wear-out packing must be replaced with a new one. Before installation, soak in the oil and fill it in one circle at a time, and the cuts should be staggered, so as to reduce water leakage.

3.The pump is not full of water or there is air in the inlet pipe. If this is the case, fill the water and pump the air out of the pipes.

The small pump pumping water upwards all the time will not directly cause damage, but long-term use in this way may have some adverse effects on the pump. Here are some factors to consider and explanations:

1.Air stuck: When the pump is pumping upwards, the pumping efficiency of the pump decreases because the liquid needs to overcome gravity to move.

When the pump is unable to pump out enough liquid quickly, air jamming can occur. In this case, the pump may run for a while, but eventually it will stop working.

2.Overheating: The small water pump is usually driven by a motor, and running for a long time will generate heat. If the pump is pumping upwards all the time, the working load of the pump will increase, causing the motor to overheat. Overheating may damage the motor or cause deformation of mechanical parts.

3.Reduced service life: Pumps are often designed to operate under normal operating conditions. When the pump is pumping upwards, the workload increases, which can accelerate the wear and damage of the pump. Long-term use in this way may result in a shortened pump life.

In order to ensure the normal operation of the small water pump and prolong the service life, it is recommended to take the following measures:

1.Make sure you have enough water: Before using a small pump, make sure that the water is sufficient and that it is able to provide the required water pressure. This ensures that the pump can pump enough water quickly without air jamming.

2.Reduce the working load of the water pump appropriately: If you need to use a small water pump continuously for a long time, you can consider installing a pressurization device to reduce the working load of the water pump, thereby reducing the damage to the water pump.

3.Regular maintenance and cleaning: Maintain and clean the small water pump on a regular basis to ensure its normal operation. Remove debris and dirt that may clog the pump to reduce the load on the pump.

In summary, the small pump pumping water all the way up will not directly cause damage, but long-term use in this way may adversely affect the pump. Therefore, it is advisable to take some precautions to ensure the proper operation and longevity of the pump.

Hello, happy to answer for you, <

The pump, that is, the centrifugal pump, can discharge the water of the centrifugal pump through high-speed rotation, so that a certain vacuum degree can be formed in the centrifugal pump, so that the external air pressure can press the water into the centrifugal pump1, before opening the pump, the suction pipe and the pump must be filled with liquid. After the pump is opened, the impeller rotates at high speed, and the liquid in it rotates with the blades, and under the action of centrifugal force, it flies away from the impeller and shoots outward, and the injected liquid gradually slows down in the pump casing diffusion chamber, and the pressure gradually increases, and then flows out from the pump outlet and discharge pipe. At this time, at the center of the blade, because the liquid is thrown around, a vacuum low-pressure area with no air and no liquid is formed, and the liquid in the liquid pool flows into the pump through the suction pipe under the action of the atmospheric pressure on the pool surface, and the liquid is continuously sucked up from the liquid pool and continuously flows out of the discharge pipe.

There can be a variety of reasons why a pump can't pump water, and here are some possible scenarios:

Leaking or clogged inlet pipes: If there is a leak or blockage in the inlet pipe, the pump can't pick up enough water to work properly.

Poor sealing of the water pump: If the water pump is not well sealed, there will be an imbalance of pressure in the pump casing, which will cause the pump to be unable to absorb water normally.

The suction height exceeds the maximum suction depth of the pump: Different types of pumps have different maximum suction depths, and if the suction height exceeds the maximum suction depth of the pump, the pump will not be able to absorb water.

Pump impeller blockage: If the pump impeller is clogged or there are foreign objects to enter, it will cause the pump to be unable to absorb water normally.

Incorrect Pump Direction: If the pump is running in the wrong direction, it will result in the pump not being able to suction water.

Insufficient power supply: If the power supply is insufficient, the pump will not function properly, which will also result in the inability to absorb water.

The above are some common reasons why the pump cannot pump water, and the specific reasons need to be analyzed according to the specific situation.

There are generally two that the pump can't pump water:

1.The inlet pipe and the pump body memory belt are trapped in the air.

2.The centrifugal speed pump speed in the metering diaphragm pump is too low.

The principle of pumping water from a water pump is as follows:

The impeller installed on the pump shaft rotates at high speed, and the force interaction between the blades and the conveyed liquid occurs, so that the liquid can obtain energy to achieve the purpose of conveying liquid.

According to the working principle of the impeller, vane pumps are divided into three basic types: centrifugal pumps, axial flow pumps and mixed-flow pumps. Centrifugal pumps are often used for horizontal pumps, and axial and mixed-flow pumps are often used for vertical pumps.

Centrifugal pump because the impeller is constantly rotating in the pump casing filled with water, the water between the blades on the impeller is subjected to centrifugal force to do centrifugal motion, rushes to the casing at a certain speed and pressure, and flows into the outlet pipeline of the pump through the flow channel in the casing, at the same time, the center of the impeller forms a vacuum, and the water of the stupid Hu suction pipeline flows into the center of the impeller to fill the vacuum area under the action of atmospheric pressure, and the water that flows into the center of the impeller is subjected to the action of centrifugal force. It also flows into the outlet pipe of the pump through the housing. In this way, as long as the suction line can maintain the replenishment of water and the impeller keeps rotating, the process of continuous water transfer of the water pump is completed.

First, the pump cannot pump water.

1. If there is air in the inlet pipe and pump body, in order to make the pump operate, it is necessary to do irrigation in advance for treatment, first empty some air in the inlet pipe and pump body, so that the pump can get greater pressure, so as to pump the water out, once there is air exists, it will directly affect its poor pressure, simply put, there is no power, once there is no power, the water can not be pumped up.

2. The speed of the centrifugal speed pump in the metering diaphragm pump is too low, and the centrifugal speed pump is to rotate the driven water, so it produces a huge centrifugal force, resulting in a pressure difference. If the speed of the centrifugal pump is too low, it will cause a pressure difference, and the water will naturally not come up.

Water source problem: If the water source is not deep enough, it is difficult for the pump to pump water; Or the water source is too far away from the pump, and the pipeline resistance is large, which affects the pumping effect.

Pump body problems: Pump body blockage, corrosion, wear, seal failure and other problems will affect the working efficiency of the pump.

Pump inlet problem: whether the inlet pipe of the pump inlet is leaked or damaged, etc., will affect the filling of the water flow at the pump inlet, thereby affecting the pumping effect.

Water pipeline problems: whether there are impurities, foreign bodies and other blockages that affect the water flow in the water pipeline, as well as the bending and rust of the water pipeline, will affect the pumping effect.

Motor problems: Factors such as motor damage, improper wiring, and unstable voltage will affect the working efficiency of the pump.

Solution: Inspect and clean the pump body, repair or replace the inlet pipeline and water pipeline, and replace or repair the motor. If the problem is more serious, you need to find a professional maintenance personnel to deal with it.