How to maintain and maintain centrifugal pumps?

1. Check whether there is loosening in the pipeline and joint of the centrifugal pump. Turn the centrifugal pump by hand to see if the centrifugal pump is flexible.

2. Add bearing lubricating oil to the bearing body, observe the oil level should be at the center line of the oil mark, and the lubricating oil should be replaced or replenished in time.

3. Unscrew the water diversion plug of the centrifugal pump body and pour the water diversion (or slurry).

4. Close the gate valve of the outlet pipeline, the outlet pressure gauge and the inlet vacuum gauge.

5. Jog the motor to see if the motor is steering correctly.

6. Start the motor, when the centrifugal pump is running normally, open the outlet pressure gauge and the inlet vacuum pump to show the appropriate pressure, gradually open the gate valve, and check the motor load at the same time.

7. Try to control the flow and head of the centrifugal pump within the range indicated on the sign, so as to ensure that the centrifugal pump runs at the highest efficiency point, so as to obtain the greatest energy-saving effect.

8. During the operation of the centrifugal pump, the bearing temperature shall not exceed the ambient temperature of 35C, and the maximum temperature shall not exceed 80C.

9. If you find that the centrifugal pump has abnormal sound, you should stop it immediately to check the cause.

10. When the centrifugal pump is to be stopped, close the gate valve and pressure gauge first, and then stop the motor.

11. The centrifugal pump should change the lubricating oil after 100 hours within the first month of work, and then change the oil once every 500 hours.

12. Adjust the packing gland frequently to ensure that the dripping situation in the packing room is normal (it is advisable to leak out the drops).

13. Regularly check the wear and tear of the shaft sleeve, and replace it in time after the wear is large.

14. When the centrifugal pump is used in the cold winter, after stopping, the lower part of the pump body needs to be unscrewed with [1] water screw plug to clean the medium. Prevents freeze cracking.

15. If the centrifugal pump is out of service for a long time, it is necessary to disassemble all the pumps, wipe off the water, coat the rotating parts and joints with grease, and keep them properly.

The maintenance and maintenance of centrifugal pumps mainly include the following aspects:

Regularly check the operation status of the centrifugal pump, including the operation of the motor, whether there is water leakage in the pump body and pipeline, and whether the pump shaft has abnormal vibration.

Clean the filter, keep the water inlet clean, and regularly clean the chamber and impeller inside the pump body to ensure smooth water flow.

Lubricate the pump bearings, replace the lubricating oil regularly, and maintain the pump bearings.

Regularly check the insulation resistance of the motor to ensure that the motor has good insulation performance.

Check and adjust the outlet pressure and flow rate of the pump frequently to ensure the efficiency and stability of the pump's operation.

If the pump is not used for a long time, the water in the pump should be emptied and the pump should be maintained to prevent the pump impeller from rusting or damage due to not rotating for a long time.

For pumps stored for a long time, the pump should be wrapped in a moisture-proof cloth and stored in a dry and ventilated place.

In short, regular inspection, cleaning and maintenance can ensure the operating efficiency and stability of centrifugal pumps, and prolong their service life.

1.Inspect and replenish lubricating oil (grease) every six months.

2.Pay attention to the leakage of the shaft seal of the water pump during operation, generally the number of drips per minute should be less than 25 drops, if the dripping is too much, the packing gland should be adjusted appropriately, so that the shaft is not overheated, and the amount of dripping water will not exceed the standard.

3.Keep the centrifugal pump and motor clean and tidy, and the motor has good heat dissipation.

4.Bearings are generally replaced during annual overhauls.

5.The maintenance of the motor shall be carried out according to the "Motor Maintenance Regulations".

6.Deal with each leakage point in a timely manner.

7.The pump inlet is strictly forbidden to enter the pump.

8 Rollback is strictly prohibited.

The maintenance of centrifugal pumps is very important for maintaining their performance and life. The following is the maintenance method of centrifugal pump:

Clean the pump body and impeller regularly: The pump body and impeller are easy to accumulate debris and dirt inside, affecting the flow and head of the pump. Therefore, regular cleaning is required so as not to affect the performance of the pump.

Check the bearings and seals: Bearings and seals are key components of centrifugal pumps, and they should be checked regularly for wear or damage. If necessary, it should be replaced in time.

Prevent the pump from freezing and cracking: In winter or low temperatures, the water in the pump body will freeze, causing the pump body to freeze and crack. To prevent this from happening, drain the water inside the pump or use antifreeze.

Regularly check the motor: The motor is the driving force source of the centrifugal pump, and its operation status and maintenance should be checked regularly.

Regularly inspect the pipeline: The pipeline is the delivery path of the pump, and should be regularly checked for rupture, water leakage or blockage, etc., and dealt with in time.

Reasonable use: In the process of using centrifugal pumps, they should be used reasonably to avoid overload operation, so as not to affect the performance and life of the pump.

In short, regular maintenance of centrifugal pumps can extend their service life, ensure their normal operation, and reduce the failure rate.

The centrifugal pump is composed of: pump casing, impeller, pump cover, seal, bearing, pump shaft, bearing box, coupling, motor, floor and other parts. In the process of using the centrifugal pump, when there is a fault and needs to be repaired, what should be done, and what should be paid attention to?

1. When the centrifugal pump is disintegrated.

1. Before disassembling the thrust bearing, the balance disc clearance should be measured by a dial gauge and recorded;

2. When the multistage pump is disassembled, each part must be marked in the original assembly order to avoid confusion and wrong installation during reassembly;

3. Small parts (such as keys) that are not convenient for marking can be put together with impellers or guide vanes (middle section) of the same level;

4. When disintegrating, you can intuitively feel whether there are abnormal parts, such as loose fit.

Second, the centrifugal pump overhaul.

1. Visually inspect whether the surface of each part is normal, and each mating surface must be free of bumps and scratches, no rust, etc.;

2. Whether the tolerance of the key fitting parts measured by the measuring tool is qualified;

3. Measure whether the clearance of the impeller sealing ring, shell sealing ring, guide vane sealing ring, interstage shaft sleeve, etc. is within the tolerance range, and the excessive wear needs to be replaced;

4. Check whether the bearing is in good condition; All seals and gaskets are replaced.

3. When the pump is reloaded.

1. Install the rotor first and re-carry out the dynamic balance test;

2. Reinstall each part in the reverse order of dismantling the pump, and pay attention to the clearance value of each sealing ring again when reinstalling to ensure that it is correct;

3. The total string volume of the rotor should be measured before installing the balance plate;

4. After installing the balance plate, measure the half-string volume of the rotor; Compared with the total string quantity and half string quantity required on the manufacturer's ** drawing, it should basically meet the requirements of the drawing. In general, the half-string volume is about half of the total string volume;

5. Tighten the main bolts evenly, and pay attention to the corresponding angles; Suck a dial gauge on the shaft, rotate the shaft to play the balance plate, and the tolerance shall not exceed the requirements of the drawing;

6. When installing the thrust bearing, attention should be paid to adjusting the clearance of the balance plate, and the adjustment ring in front of the bearing should be used to adjust the balance plate clearance to the requirements of the drawing.

The maintenance of centrifugal water pumps requires the following attention:

Regular inspection: Inspect the centrifugal pump during the constant excitation period to ensure that it is working properly.

Check the lubricating oil:

Check the lubricant regularly to make sure it is adequate, and if it is not, it needs to be refilled.

Cleaning the inside of the pump:

Clean the inside of the pump regularly to prevent the inside of the pump from being blocked, so as to ensure the normal operation of the pump.

Check the motor: Check the motor regularly to ensure that the motor is working properly, if the motor is faulty, it needs to be repaired in time.

Check the bearing: Inspect the bearing regularly to ensure that the bearing is working properly, and if the bearing is faulty, it needs to be repaired in time.

Precautions: When maintaining a centrifugal pump, the pump instructions and safety specifications should be followed.

When maintaining the centrifugal water pump, the clear socks should be made with appropriate tools to avoid damage to the pump caused by improper tools.

If you are not familiar with the maintenance work of centrifugal pumps, it is recommended to ask a professional to carry out maintenance to ensure the quality of maintenance.

1. Check whether there is loosening in the pump pipeline and joint. Turn the pump by hand to see if it is flexible.

2. Add bearing lubricating oil to the bearing body, and the oil level should be at the center line of the oil standard, and the lubricating oil should be replaced or replenished in time.

3. Unscrew the water diversion plug of the pump body and pour the water infusion.

4. Close the gate valve and outlet pressure gauge of the outlet pipeline.

5. Jog the motor, and test the welding pipe to see if the motor is turned correctly.

6. Start the motor, when the water centrifugal pump is running normally, open the outlet pressure gauge to see that it shows the appropriate pressure, gradually open the gate valve, and check the load of the motor at the same time.

7. Try to control the flow and head of the pump within the range indicated on the sign, so as to ensure that the pump runs at the highest efficiency point, so as to obtain the greatest energy-saving effect.

8. During the operation of the pump, the temperature of the bearing of the stove shall not exceed 35 ambient temperature, and the maximum temperature of the welded pipe shall not exceed 80.

9. If you find that the pump has abnormal sound, you should stop immediately to check the reason.

10. When the pump is to be stopped, close the gate valve and pressure gauge first, and then stop the motor.

11. The lubricating oil of the pump shall be changed after 100 hours within the first month of work, and the oil shall be changed once every 500 hours thereafter.

12. Adjust the packing gland frequently to ensure that the dripping situation in the packing chamber is normal.

13. Regularly check the wear and tear of the shaft sleeve, and replace it in time after the wear is large.

14. When the pump is used in the cold winter season, after stopping, the lower part of the pump body needs to be unscrewed to release the medium. Prevents freeze cracking.

15. If the pump is out of tin-free welded pipe for a long time, it is necessary to disassemble all the pumps, wipe off the water, coat the rotating parts and joints with grease, and keep them properly.

1. Whether the temperature of the bearing and stuffing box is too high, whether the amount of lubricating oil is sufficient, and whether the oil quality is good.

2. Pay attention to the oil ring, so that it can rotate freely with the pump shaft. Maintain the bearing oil level at the required height. After running for a period of time, change the oil again.

3. Pay attention to the tightness of the packing gland so that a small amount of water drips out.

4. Pay attention to the fact that there is no friction sound, noise, vibration and other phenomena in the empty mind of the water pump.

5. Pay attention to observe whether the various accounting instruments are in a normal state to ensure the safe operation of the trapped pump in front of the bucket.

Centrifugal pump is a common type of water pump in the industry, and it will cause some failures or need maintenance when used frequently. The following is the repair and maintenance of centrifugal pumps:

Clean the inlet and outlet of the centrifugal pump: During the use of the centrifugal pump, the inlet and outlet may be blocked due to impurities in the medium and other reasons, which will affect the normal operation of the pump. Therefore, regular cleaning of inlets and outlets is key to keeping centrifugal pumps working properly.

Replace the seals: The seals of centrifugal pumps will wear out during use, resulting in increased leakage and noise of the pump. Therefore, regularly checking and replacing the seals of the pump is an important measure to ensure the normal operation of the centrifugal pump.

Replacement of bearings and mechanical seals: Bearings and mechanical seals of centrifugal pumps wear out during use and need to be replaced regularly to ensure the normal operation of the pump.

Check the motor: The motor of the centrifugal pump may fail during use and need to be checked and repaired regularly.

Regular lubrication: Centrifugal pumps need to be filled with lubricating oil regularly during use to keep bearings and other mechanical parts lubricated and working properly.

Check and adjust the flow and head of the pump: The flow rate and head of the centrifugal pump are the key parameters of the pump, which need to be checked and adjusted regularly to ensure the performance of the pump.

Check and clean the filter regularly: If the centrifugal pump comes with a filter, you need to check and clean the filter regularly to ensure the proper operation of the pump.

<> general centrifugal pumps have a service life, but manufacturers rarely tell customers when they buy. In the use of the pump equipment, the continuous operation, the friction between the impeller and the water, and the cavitation phenomenon generated by the pump, constantly exert pressure and erosion on the overflow part of the pump body. The vibration of the motor and the influence of the audio for a long time, the rust of the atmosphere on the iron surface, and the increase of the power consumption of the motor as the assembly gap increases, so we can consider purchasing a new water pump.

1.The service life of centrifugal pumps is generally five to seven years, mechanical seals.

One or two years can be replaced, depending on the frequency of use, it is recommended that the pipeline pump impeller be replaced once every five years, if you hear a very strong friction sound in the motor, then you can replace the bearing, disassemble the pump, take out the bearing to see the model above to buy.

2.Cleaning centrifugal pump is a kind of high-pressure pump, low flow, its age is four to five years, the pump components are more affected by cavitation, the rubber sealing ring inside must be replaced with the drop of pressure, the life of the hard plastic hammer is three months - five months, the connecting rod shaft is one year, and the motor is five years.

3.The flow rate of multi-stage centrifugal pump is small to large, a multi-type pump, the head is from more than 20 meters to more than 300 meters, the motor is from kilowatts to 160 kilowatts, the life of the multi-stage pump is 5-8 years, the main wearing parts are plum blossom pads and mechanical seals, plum blossom pads can be damaged and visible, mechanical seal wear will produce water, and some multi-stage centrifugal pumps are sealed with packing packing, and the water output can be controlled with screw caps, and it is better to seal 6 drops of water per minute.