What is the reason why the household vacuum water pump cannot absorb water?

This self-priming pump in your home must be a double-pipe vacuum self-priming pump, first of all, the air in the pump and suction pipeline is not discharged when it is installed for the first time, so it will cause this phenomenon, you fill up the water in the pump body and pipeline to check whether the water level in the pump body has dropped, there will be a decline, indicating that the bottom valve of water absorption may have leakage. The foot valve is to be replaced.

Check the inlet pipeline to see if there is a dripping phenomenon, which is generally a problem with the inlet pipeline.

The seal is not good, and then the internal parts are aging, it is recommended to remove it and take it to the place where the pump is repaired and let the master disassemble and repair it!

There is no water in the pipe, there is air running in, then install an automatic switch, one is almost 50 yuan, all copper, after installing it, it will definitely not,

The need to add a check valve to the inlet of the pump solves the problem.

When the pump blade rotates at high speed in the pump body, due to the effect of centrifugation, the fluid density increases in the area where the blade is far from the axis, resulting in a certain positive pressure; In the area close to the shaft, the density of the fluid decreases, forming a certain negative pressure (commonly known as "vacuum"), using this mechanism, we make a pump or fan, so that the fluid continuously enters from the negative pressure and continuously presses out from the positive pressure.

If there is a gap between the blades and the pump body, there will be a positive pressure to negative pressure string gas (flow), resulting in a great reduction in the delivery effect of the pump or fan; However, in order to avoid contact between the blades and the pump body, there needs to be a certain gap between them. This gap is sealed by the fluid being transported.

In a water pump, water is not just a fluid to convey, it also acts as a seal in the gap between the pump body and the blades.

When there is no water in the pump body, the seal is not enough, and the vacuum formed is not enough to suck up the well water.

There are several factors influencing the suction power of a vacuum pump: 1. Pipe leakage. 2 Pump leakage 3 Insufficient pump water supply 4 High pump water supply temperature 5 Poor pump exhaust 6 Damaged pump end clearance You can analyze it from the above reasons.

Let's see if we can fix it. In addition, the vacuum pressure of the vacuum pump is the same. It's just the size of the traffic.

If you really don't have enough strength, the easiest way is to make the suction cup bigger. If the air leakage is large during adsorption, the flow rate should be increased by increasing the vacuum pump; If the strength is not enough, the adsorption area should be increased; If the sheet is deformed when the adsorption area is large, it should be multiple adsorption ports.

The reason is that there is air in the inlet pipe and pump body, and the pump speed is too low.

1. There is air in the inlet pipe and pump body.

If the self-priming pump is not filled with water before it starts, it may be that the pump body and the inlet pipe foundation have a high downward slope, or the pump is worn out due to high age, and the closure of long-term latent underwater will also cause corrosion, holes, cracks, etc.

2. The speed of the pump is too low.

The speed of the pump is low and can not achieve the effect of self-priming, and the appearance of no pumping is the phenomenon of insufficient pumping power, resulting in the pump pumping water without water, these factors are common in mechanical failure, improper installation, damage to the motor, improper configuration of the motor and other reasons.

Effect of cavitation on the pump after the occurrence of cavitation:

1. The performance of the pump changes.

When cavitation is first born, there is no significant effect on the external characteristics of the pump. After cavitation develops to a certain extent, parameters such as power, efficiency, flow and head of the pump will suddenly decrease. When cavitation is fully developed, the effective flow area of the water flow will be reduced a lot, resulting in the interruption of the water flow and the failure to work.

2. Cause vibration and noise.

When the bubble bursts, the liquid particles impact each other, resulting in noise and unit vibration, and the two excite each other to produce strong vibration of the pump, which is called cavitation resonance phenomenon.

It's a matter of sealing.

The reason for not being able to absorb water is that there is air in the pump body or gas accumulation in the inlet pipe, or the bottom valve is not closed tightly, the irrigation and water diversion are not satisfied, the packing of the vacuum pump is seriously leaking, and the gate valve or the door is not closed tightly. After passing the inspection one by one, measures such as repairing the foot valve, removing the blockage, correcting the steering, and cleaning the impeller can be taken separately.

There is a leak in the water inlet pipe!

Reasons why the pump can't pump water.

1. There is air in the inlet pipe of the water pump and the pump body of the water pump. The pump is not filled with enough water before starting, and sometimes it looks like the filled water has overflowed through the vent, but the air is completely discharged without turning the pump shaft, leaving a little air in the inlet pipe or pump body.

2. The speed of the pump is too low. Some users are driven by another motor due to the damage of the original motor, resulting in small flow, low head and even no water.

3. The suction stroke of the water pump is too large. Some water sources are deeper, and some water sources are flatter on the periphery, and the allowable suction range of the pump is ignored, resulting in little or no water absorption. It is important to know that there is a limit to the vacuum that can be established at the suction port of the water pump, and the suction stroke of the absolute vacuum is about 10 meters high in the water column, while the water pump cannot establish an absolute vacuum.

Moreover, the vacuum is too large, which is easy to vaporize the water in the pump, which is not conducive to the work of the pump.

Are you talking about not being able to absorb water, or the head is not enough and the water pressure is low. If you can't absorb water, it may be that the pump is not filled with water, or the water inlet end is leaking, and the impeller is seriously worn. The water pressure is low, it may be the outlet end, the water pipe is blocked, and then the impeller is seriously worn.

The reason is that there is air or air accumulation in the inlet pipe in the pump body, or the bottom valve is not tightly closed, the irrigation and water diversion are not satisfied, the vacuum pump packing is seriously leaking, and the gate valve or the door is not closed tightly. Elimination method: first press the water up, then fill the pump body with water, and then turn on the machine.

At the same time, check whether the check valve is tight, whether there is air leakage in the pipeline and joint, if air leakage is found, apply lubricating oil or blending paint to the joint after disassembly, and tighten the screws. Check the oil seal ring of the pump shaft, if the wear is serious, it should be replaced with a new part. Leaking water or air in the pipes.

It is possible that the nut is not tightened during installation. If the leakage is not serious, cement can be applied to the area of air or water leakage, or cement slurry mixed with asphalt oil. Temporary repairs can be made with wet mud or soft soap.

If there is water leakage at the joint, you can tighten the nut with a wrench, if the water leakage is serious, you must re-disassemble and replace the cracked pipe; The head is lowered and the nozzle of the pump is pressed underwater.

Hello, if your pump can't pump up the water, you first need to check whether there is still water, if there is no water, it is useless to pump for a long time, and on the other hand, whether the connection between your pump and the water pipe is correct, whether there is a connection to the water pipe, if the connection is wrong, the pump will not be able to pump water, and finally you have to see if there is a leak, if the air leaks, the pump pressure will not be large enough, which will also lead to no way to pump water up. You can check them one by one from these three aspects, I hope it can help you.

Reasons why the pump can't pump water.

Reasons and solutions for the pump not being able to pump water:

1. The impeller rotates unbalanced, the coupling is not tight enough, and the parts are loose and broken, etc., resulting in large vibration of the water pump. These problems can be solved by means of adjustments, reinforcements, repairs, or replacements.

2. The nut is not tightened during installation, resulting in water leakage and air leakage of the water pipe. This is a good solution, if it is a slight leak, it will be plugged with cement and asphalt oil in the leakage, and if the leakage is more serious, it must be replaced or reinstalled.

3. Because the packing pressure is too solid, the cold water cannot enter the inside of the packing, or the table of the shaft has been damaged. In this case, it is only necessary to loosen the packing and clean the clogged pipes.

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

Maintenance of the water pump:

1. Once any accident occurs, the pump can not continue to work, even if it is a small accident. If the packing of the pump is worn out, it must be filled up in time, if it is continued to be used, it will lead to air leakage. This will affect the wear and tear of the motor and directly destroy the impeller.

2. If you find that vibration will occur when you use it, you should stop immediately to check the specific cause, and if you still use it in vibration, it will also cause damage.

The reasons why vacuum pumps have no suction are as follows:

1. The vacuum pump model is too small. If the vacuum level is not enough, it may be the wrong model, and it is recommended to change to a larger model.

2. Wrong power supply frequency. Adjust the frequency of the corresponding power supply.

3. Wrong motor rotation direction. Replace the motor in the direction of the vertical shed.

4. Vacuum leakage of system pipelines. Inspect the system tubing and confirm the air tightness.

5. Pump oil failure. Change the pump oil.

6. The exhaust filter is blocked. Replace the exhaust filter with a new one.

7. The air filter is blocked. Clean and replace the air cleaner.

8. The blades are worn and deformed. Replace the blades.

Uses of vacuum pumps:

1. The most direct and objective use of vacuum pump is to generate negative pressure. Devices and equipment that use mechanical, physical, chemical or physicochemical methods to extract air from the pumped container to obtain a vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in an enclosed space.

2. The vacuum pump outputs mainly the pressure generated by the power service system, but when it cannot work normally, it can still drive the hydraulic system by manpower to play a role in assisting. The role of automobile vacuum pump is mainly manifested in increasing the force of molded fiber impulse.

3. From this point of view, the function of the vacuum pump is to extract the gas molecules from the vacuum chamber and reduce the gas pressure in the vacuum chamber to achieve the required vacuum degree. This is particularly evident in the field of vacuum pump packaging, for example. <>

Kiss! Hello, happy to answer your <>

The reasons why the vacuum water pump cannot absorb water are as follows: 1. There is no storage liquid in the pump or the storage liquid is insufficient, and the solution is that you need to add enough storage liquid in the water pump. 2. The solution is to eliminate the phenomenon of air leakage in the suction pipe of the water pump.

3. The voltage of the pump is too low, and the solution is to adjust the voltage. 4. If the suction stroke of the pump is too high or the suction pipeline is too long, the solution is to reduce the suction lift or shorten the pipeline. 5. The filter screen of the inlet pipeline in the pump is blocked by debris, and the solution is to clean up the debris on the filter screen of the inlet pipe of the water pump.

6. The impeller is damaged or worn, and the impeller blades will be worn or damaged after long-term use, which will affect the water pump. The solution is to replace the impeller with a new one. 2. Precautions for the installation of household water pumps 1. The inlet pipeline of the water pump needs to be well sealed, and at the same time, there must be supporting support, and it cannot be hung on the water pump.

2. The pump machine and the pump base should be horizontal, so that it is relatively firm. 3. When the pump is installed, it is very important to determine the appropriate position, which requires the pump to be able to suck up the vacuum height, and at the same time, it is also necessary to ensure that it is in a horizontal state, stable and firm, in addition, it is also necessary to ensure that the rotation direction of the power machinery is consistent with the pump. Hope mine can help you <>

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