A pump is a machine that converts mechanical energy into liquid energy and is used to pressurize the liquid. Pumps are the most widely used and common general-purpose machinery in the national economy. Except for the large-scale use of water conservancy, electric power, agriculture, and mines, they are the most used in petrochemical production, and due to the large number of raw materials, semi-finished products, and final products in chemical production. Is a liquid with different properties, such as corrosive, solid-liquid two-phase flow, high temperature or low temperature, requiring a large number of chemical pumps with certain characteristics to meet the process requirements. Product development in this area has always been very active.
First, the Atlantic pump industry to take everyone to analyze the reasons for the pump does not water 1, the inlet pipe and the pump body air (1) the pump is not filled with enough water before the start, sometimes it seems that irrigation water has overflowed from the vent hole, but not Turn the pump shaft so that the air is completely discharged, so that a little air remains in the inlet pipe or the pump body.
(2) The horizontal section of the inlet pipe in contact with the water pump shall be applied with a descending slope of 0.5% or more in the direction of the reverse flow, and the end connected to the pump inlet shall be the highest, and shall not be completely horizontal. If it is lifted upwards, air will remain in the inlet pipe, which will reduce the degree of vacuum in the pipes and the water pump, affecting water absorption.
(3) The filler of the pump has been worn out for a long time or the packing is too loose, causing a large amount of water to be ejected from the clearance between the packing and the shaft sleeve of the pump shaft. As a result, external air enters the interior of the pump from these clearances. Affected the lifting of water.
(4) The water inlet pipe has holes due to long-term potential underwater and corrosion of the pipe wall. After the water pump works, the water surface continues to drop. When these holes are exposed to the water surface, air enters the water inlet pipe from the hole.
(5) There is a crack at the elbow of the inlet pipe, and there is a slight gap between the inlet pipe and the pump, which may cause air to enter the inlet pipe.
2, the pump speed is low (1) human factors. Some users were arbitrarily coupled with another motor due to the damage of the original motor, resulting in the consequences of small flow, low head, and no watering.
(2) The mechanical failure of the pump itself. The loosening of the impeller or the pump shaft fastening nut or the deformation and bending of the pump shaft causes the impeller to move more, directly rubbing against the pump body, or bearing damage, which may reduce the pump speed.
(3) The maintenance of the power machine is not working. The motor is lost due to the windings burned out, and the number of windings, wire diameters, and wiring methods in the maintenance, or failures in the maintenance that are not completely eliminated will also cause the pump speed to change.
3, the pump suction process is too large Some water sources are deeper, some of the water sources of the outer ground is flat, and ignore the water pump's allowable suction process, resulting in little or no water absorption results. It should be noted that the degree of vacuum that can be established at the suction port of the self-priming centrifugal pump is limited. The absolute vacuum suction process is approximately 10 meters of water column height, and it is impossible for the pump to establish an absolute vacuum.
Moreover, if the vacuum degree is too large, the water in the pump is easily vaporized, which is unfavorable to the work of the water pump. So each centrifugal pump has its maximum allowable suction range, generally between 3 and 8.5 meters. The installation of the pump must not be simple and convenient.
4, the flow of water in and out of the water pipe resistance loss is too large Some users have measured, although the vertical distance from the reservoir or water tower to the water source is also slightly smaller than the pump lift, but the amount of water is not lifting or mention water. The reason is often that the pipeline is too long, the water pipe bends more, and the resistance loss of the water flow in the pipeline is too large.
The reason is often that the pipeline is too long, the water pipe bends more, and the resistance loss of the water flow in the pipeline is too large. In general, the 90-degree elbow has a greater resistance than the 120-degree elbow, and each 90-degree elbow head loss is about 0.5 to 1 meter. The resistance of each 20-meter pipe can make the head loss about 1 meter. In addition, some users are also free to enter and exit the pipe diameter of the pump, which also has a certain impact on the lift.
5, electric rotor imbalance due to the intense vibration of the pump may lead to unbalanced electric rotor, or poor coupling coupling, bearing wear and bending; may also rotate part of the parts loose, broken; may be due to the pipe bracket is not solid and so on. Can be adjusted, repaired, reinforced, replaced, etc.
Leaks or leaks in the piping may not be tightly tightened during installation. If the leakage is not serious, you can apply cement or cement slurry mixed with asphalt oil in places where there is leakage or water leakage. Temporary repairs may be coated with wet mud or soft soap. If you leak at the joint, you can tighten the nut by hand. Serious leakage must be re-installed.
Filler overheating due to excessive pressure on the packing, cooling water into the packing, or shaft surface damage. You can take appropriate measures such as loosening the packing and cleaning up the plugging of the tube. Filler wear must be replaced with new ones. Soaked in the oil before installation, loaded by the circle, the incision should be staggered, so as to reduce leakage. After the last ring of packing is installed, the cover must be tightly fitted and the tightness adjusted after operation.
The reason why the pump does not absorb water or not drains is that the bottom valve is stuck, the filter water is blocked, the water absorption height is too high, or the water absorption leaks. It may also be due to incorrect steering and blocked impeller passages. After checking one by one, measures such as repairing the bottom valve, removing the plug, correcting the steering, and cleaning the impeller may be taken separately.
6, the pump body vibration or noise due to the pump is not fixed or the pump is installed too high, or motor ball bearing damage, the water pump spindle bending or motor shaft misalignment, not parallel and so on. Should install the steady water pump or reduce the installation height of the water pump, replace the motor ball bearing, correct the curved water pump main shaft or adjust the relative position of the water pump and the electrical machinery. With other factors, the bottom valve cannot be opened. It is usually due to the long time for the pump to stand, the bottom valve gasket is stuck, and the bottom valve without the gasket may rust.
7. Influence of other factors (1) The bottom valve cannot be opened. It is usually due to the long time for the pump to stand, the bottom valve gasket is stuck, and the bottom valve without the gasket may rust.
(2) The bottom valve filter net is blocked; or the bottom valve can cause blockage of the filter in the sludge layer.
(3) The impeller wears badly. Impeller blades wear over a long period of use, affecting the performance of the pump.
(4) Gate valve failure or blockage of the Check Valve will result in reduced flow or even failure to catch water.
(5) The leakage of the outlet pipe will also affect the amount of water pumped.
Second, how to eliminate the drainage pump water failure 1, no water after the start: the pump air or water pipe product gas, or the bottom valve is not closed irrigation water is not filled, the vacuum pump packing serious leakage, valve or flap closed close .
Exclude: remove debris, replace the damaged rubber pad, change the direction of the valve piece; compact or replace the new packing, close the valve or shoot the door; increase the amount of irrigation, until the bleed plug is not bubbling; replacement There is a cracked pipe; reduce the head and press the nozzle of the pump into the water for 0.5 meters.
2. When the pump starts, the pump does not turn: the packing is too tight or the impeller and the pump body are jammed by the debris, or the pump shaft, the bearing, the leakage reduction ring are rusted, or the pump shaft is seriously bent.
Exclude: Relax the packing and unclog the sink; disassemble the pump body to remove impurities and remove rust; remove the shaft calibration or replace the new pump shaft.
3, pump heat bearing damage: rolling bearing or bracket cover gap is too small; the pump shaft is bent or two axes do not care; tape is too tight; lack of oil or oil is not good; impeller balance hole plug, impeller loses balance, increase The thrust to the side.
Exclude: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; adjust the pump shaft or adjust the concentricity of the two shafts; properly loosen the tightness of the tape; add clean butter, butter in the bearing 60% of the void; clear the plug in the balance hole.
4. Insufficient flow after start-up: The speed is not matched or the belt slips to make the speed low; The installation angle of the axial pump blade is too small; The lift is insufficient; The suction process is high; The bottom valve, pipe and impeller are partially blocked or the impeller is missing; Water leaks are serious.
Exclude: restore the rated speed, remove the belt grease, adjust the tightness of the belt; adjust the blade angle, reduce the installation position of the pump; seal the leakage point of the pump, compress the packing; clear the plug, replace the impeller; replace the leakage reduction ring, plug the leak Department.
First, the Atlantic pump industry to take everyone to analyze the reasons for the pump does not water 1, the inlet pipe and the pump body air (1) the pump is not filled with enough water before the start, sometimes it seems that irrigation water has overflowed from the vent hole, but not Turn the pump shaft so that the air is completely discharged, so that a little air remains in the inlet pipe or the pump body.
(2) The horizontal section of the inlet pipe in contact with the water pump shall be applied with a descending slope of 0.5% or more in the direction of the reverse flow, and the end connected to the pump inlet shall be the highest, and shall not be completely horizontal. If it is lifted upwards, air will remain in the inlet pipe, which will reduce the degree of vacuum in the pipes and the water pump, affecting water absorption.
(3) The filler of the pump has been worn out for a long time or the packing is too loose, causing a large amount of water to be ejected from the clearance between the packing and the shaft sleeve of the pump shaft. As a result, external air enters the interior of the pump from these clearances. Affected the lifting of water.
(4) The water inlet pipe has holes due to long-term potential underwater and corrosion of the pipe wall. After the water pump works, the water surface continues to drop. When these holes are exposed to the water surface, air enters the water inlet pipe from the hole.
(5) There is a crack at the elbow of the inlet pipe, and there is a slight gap between the inlet pipe and the pump, which may cause air to enter the inlet pipe.
2, the pump speed is low (1) human factors. Some users were arbitrarily coupled with another motor due to the damage of the original motor, resulting in the consequences of small flow, low head, and no watering.
(2) The mechanical failure of the pump itself. The loosening of the impeller or the pump shaft fastening nut or the deformation and bending of the pump shaft causes the impeller to move more, directly rubbing against the pump body, or bearing damage, which may reduce the pump speed.
(3) The maintenance of the power machine is not working. The motor is lost due to the windings burned out, and the number of windings, wire diameters, and wiring methods in the maintenance, or failures in the maintenance that are not completely eliminated will also cause the pump speed to change.
3, the pump suction process is too large Some water sources are deeper, some of the water sources of the outer ground is flat, and ignore the water pump's allowable suction process, resulting in little or no water absorption results. It should be noted that the degree of vacuum that can be established at the suction port of the self-priming centrifugal pump is limited. The absolute vacuum suction process is approximately 10 meters of water column height, and it is impossible for the pump to establish an absolute vacuum.
Moreover, if the vacuum degree is too large, the water in the pump is easily vaporized, which is unfavorable to the work of the water pump. So each centrifugal pump has its maximum allowable suction range, generally between 3 and 8.5 meters. The installation of the pump must not be simple and convenient.
4, the flow of water in and out of the water pipe resistance loss is too large Some users have measured, although the vertical distance from the reservoir or water tower to the water source is also slightly smaller than the pump lift, but the amount of water is not lifting or mention water. The reason is often that the pipeline is too long, the water pipe bends more, and the resistance loss of the water flow in the pipeline is too large.
The reason is often that the pipeline is too long, the water pipe bends more, and the resistance loss of the water flow in the pipeline is too large. In general, the 90-degree elbow has a greater resistance than the 120-degree elbow, and each 90-degree elbow head loss is about 0.5 to 1 meter. The resistance of each 20-meter pipe can make the head loss about 1 meter. In addition, some users are also free to enter and exit the pipe diameter of the pump, which also has a certain impact on the lift.
5, electric rotor imbalance due to the intense vibration of the pump may lead to unbalanced electric rotor, or poor coupling coupling, bearing wear and bending; may also rotate part of the parts loose, broken; may be due to the pipe bracket is not solid and so on. Can be adjusted, repaired, reinforced, replaced, etc.
Leaks or leaks in the piping may not be tightly tightened during installation. If the leakage is not serious, you can apply cement or cement slurry mixed with asphalt oil in places where there is leakage or water leakage. Temporary repairs may be coated with wet mud or soft soap. If you leak at the joint, you can tighten the nut by hand. Serious leakage must be re-installed.
Filler overheating due to excessive pressure on the packing, cooling water into the packing, or shaft surface damage. You can take appropriate measures such as loosening the packing and cleaning up the plugging of the tube. Filler wear must be replaced with new ones. Soaked in the oil before installation, loaded by the circle, the incision should be staggered, so as to reduce leakage. After the last ring of packing is installed, the cover must be tightly fitted and the tightness adjusted after operation.
The reason why the pump does not absorb water or not drains is that the bottom valve is stuck, the filter water is blocked, the water absorption height is too high, or the water absorption leaks. It may also be due to incorrect steering and blocked impeller passages. After checking one by one, measures such as repairing the bottom valve, removing the plug, correcting the steering, and cleaning the impeller may be taken separately.
6, the pump body vibration or noise due to the pump is not fixed or the pump is installed too high, or motor ball bearing damage, the water pump spindle bending or motor shaft misalignment, not parallel and so on. Should install the steady water pump or reduce the installation height of the water pump, replace the motor ball bearing, correct the curved water pump main shaft or adjust the relative position of the water pump and the electrical machinery. With other factors, the bottom valve cannot be opened. It is usually due to the long time for the pump to stand, the bottom valve gasket is stuck, and the bottom valve without the gasket may rust.
7. Influence of other factors (1) The bottom valve cannot be opened. It is usually due to the long time for the pump to stand, the bottom valve gasket is stuck, and the bottom valve without the gasket may rust.
(2) The bottom valve filter net is blocked; or the bottom valve can cause blockage of the filter in the sludge layer.
(3) The impeller wears badly. Impeller blades wear over a long period of use, affecting the performance of the pump.
(4) Gate valve failure or blockage of the Check Valve will result in reduced flow or even failure to catch water.
(5) The leakage of the outlet pipe will also affect the amount of water pumped.
Second, how to eliminate the drainage pump water failure 1, no water after the start: the pump air or water pipe product gas, or the bottom valve is not closed irrigation water is not filled, the vacuum pump packing serious leakage, valve or flap closed close .
Exclude: remove debris, replace the damaged rubber pad, change the direction of the valve piece; compact or replace the new packing, close the valve or shoot the door; increase the amount of irrigation, until the bleed plug is not bubbling; replacement There is a cracked pipe; reduce the head and press the nozzle of the pump into the water for 0.5 meters.
2. When the pump starts, the pump does not turn: the packing is too tight or the impeller and the pump body are jammed by the debris, or the pump shaft, the bearing, the leakage reduction ring are rusted, or the pump shaft is seriously bent.
Exclude: Relax the packing and unclog the sink; disassemble the pump body to remove impurities and remove rust; remove the shaft calibration or replace the new pump shaft.
3, pump heat bearing damage: rolling bearing or bracket cover gap is too small; the pump shaft is bent or two axes do not care; tape is too tight; lack of oil or oil is not good; impeller balance hole plug, impeller loses balance, increase The thrust to the side.
Exclude: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; adjust the pump shaft or adjust the concentricity of the two shafts; properly loosen the tightness of the tape; add clean butter, butter in the bearing 60% of the void; clear the plug in the balance hole.
4. Insufficient flow after start-up: The speed is not matched or the belt slips to make the speed low; The installation angle of the axial pump blade is too small; The lift is insufficient; The suction process is high; The bottom valve, pipe and impeller are partially blocked or the impeller is missing; Water leaks are serious.
Exclude: restore the rated speed, remove the belt grease, adjust the tightness of the belt; adjust the blade angle, reduce the installation position of the pump; seal the leakage point of the pump, compress the packing; clear the plug, replace the impeller; replace the leakage reduction ring, plug the leak Department.
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