Our company is a professional manufacturer of fluid machinery, and its products include vacuum pump, gear pump, centrifugal pump and piston pump. Every product has passed strict quality control tests, so its performance is superior and its quality is stable. Pump is the central hub of fluid transportation, and its improper use and maintenance methods will affect the life of the pump, greatly affect the operation of the pump, and even cause irreparable losses. To prevent intangible losses, it depends on your understanding of the pump, correct use and usual maintenance.

If you have any problems in use and maintenance, please contact our company immediately, and our company will provide you with the most cordial and perfect service.

2 installation:

2. 1 Before installation, please check whether all parts of the machine body are complete. If there is any shortage or damage in the processing, please inform our company immediately, and we will finish it immediately or send someone to deal with it.

2.2 The installation site should be dry and ventilated to facilitate loading, unloading and maintenance.

2.3 The foundation for installing the pump must be straight, so that the base can be evenly placed on the foundation platform to avoid deformation and stress of the base.

2.4 When burying the anchor screws, it is necessary to wait for the cement to harden and there is no gap between the base and the foundation before locking the anchor screws.

2.5 Check whether the pump is horizontal, whether the coupling (pulley) is aligned, whether the belt tightness is moderate, and whether the pump and foundation platform are stable.

2.6 The closer the installation position of the pump is to the liquid level, the better.

2.7 The pipe joint should be locked, and the external load of the inlet pipe should not be applied to bend the pipe.

2.8 Inspection essentials of coupling: The coupling pump is generally driven by a flexible coupling, and the angle between the pump and the motor centerline must be correct to avoid abnormal damage to the coupling and noise vibration.

3 pipeline:

3. 1 The suction pipe has negative pressure, so steel pipe or other hard materials should be used.

3.2 The inlet of the pump should be as close to the liquid as possible to reduce the pipeline loss.

3.3 After the pipeline is completed, the tight seal cannot be removed first, and it can only be removed after the pipeline is cleaned up.

3.4 When the inlet pipe is overweight, it should be supported to prevent the pump from being deformed due to load.

3.5 After the gas inlet pipeline is completed, gas leakage detection shall be carried out to avoid gas leakage during use, resulting in reduced flow or inability to self-suck.

3.6 At the joint between the pipeline and the pump outlet, a shockproof hose must be installed, and the pipeline should also be supported and fixed to avoid pump failure caused by external force deformation.

3.7 When the vapor pressure of liquid is too high, it must flow into the pump with positive pressure, and sufficient pressure can avoid insufficient vapor and suction.

3.8 The installation of the inlet vacuum gauge and the outlet pressure gauge is very convenient for use and maintenance, and it is best to install them for standby.

3.9 In principle, the pumps in the suction tank should be installed separately and side by side.

3. 10 When the small tube enters the larger water absorption tank, the water should flow into the water absorption tube evenly.

3. 1 1 The water inlet pipe should be installed in the center of the suction tank as far as possible.

3. 12 When there is only one waterway, try to avoid direct discharge of all water inlet pipes at this intersection.

3. 13 water inlet pipe should be as short as possible. If elbow is needed, elbow with larger radius of curvature should be adopted, and the elbow should not be too close to the pump inlet.

3. 14 intake pipe should not fluctuate in the middle, but slightly incline downward from the pump (the slope is about1/50-1100) to avoid air accumulation in the middle.

3. 15 When the diameter of the suction pipe is different from that of the suction port of the pump, the eccentric reducer should be connected, otherwise the air will stay in the reducer and the upper part of the pipeline. The bottom valve must not be too close to the outlet of the sink, otherwise air will be sucked in. The distance between the water level of the sink and the bottom valve should not be too short, so as to prevent water from swirling and sucking air. In order to prevent foreign objects from blocking the bottom valve or impeller, a filter with sufficient area should be used, and a metal mesh should be installed upstream in places with many branches, leaves and weeds to prevent the filter from blocking.

4 wire:

4. 1 Select the appropriate wiring material according to the rated current capacity of the motor. (According to electrical regulations)

4.2 The capacity of the fuse shall be 2-3 times of the rated current capacity of the motor.

4.3 It is best to start the pump with electromagnetic switch, and start the large-capacity pump with star triangle.

4.4 Check whether the steering is consistent with the arrow.

5 operation:

5. 1 Before operation:

5. 1. 1 Inspection of lubricating oil: If foreign matter exists, the bearing will be damaged in a short time.

A) When using engine oil for lubrication, the amount of oil should be filled to the middle of the oil level, not too much or too little.

B) When grease is used for lubrication, grease cannot fill the bearing box to avoid bearing heating.

5. 1.2 Check whether there is friction between rotating bodies.

A) If foreign matter enters, it will cause friction and affect the operation.

B) Check the rotating direction of the motor. If the rotation direction is opposite, it is easy to make the impeller lock nut installed on the shaft fall off. Before the test run, it is necessary to fill water before the test run to avoid damaging the shaft seal.

5. 1.3 after the trial operation is completed:

A) Fill the pump body and water inlet pipe with water and exhaust air, otherwise the water cannot be pumped out and the shaft seal will be burnt out.

B) Open the valve slowly during operation, and pay attention to the reading of ammeter. Do not unscrew the valve quickly to avoid overloading the motor.

5.2 In operation:

5.2. 1 Bearing part:

A) During the initial operation of about one hour, pay close attention to overheating, and the bearing temperature shall not exceed the ambient temperature+40 C.. In general, it is recommended to keep it below 75 C. ..

B) Confirm again whether all bearings are lubricated with lubricating oil.

Packaging part:

A) Packing should not be too tight to avoid overheating, damage or spindle wear.

B) The tightness of the packing is usually suitable for the packing cover to leak a small amount of water.

C) The temperature of the stuffing box is usually kept below 40℃.

5.2.3 Body parts:

A) When running, unscrew the air cock at the top of the machine body at any time to check whether the air leaks in.

B) If there is air leakage, check whether there is crack at the inlet or eddy current in the suction tank.

5.3 Stop:

5.3. 1 When the self-priming pump stops running, the outlet valve should be closed first, and then the power supply should be turned off, otherwise water hammer will occur, which will increase the load of the pump.

5.3.2 When using the scroll pump, a check valve should be installed at the outlet pipe to prevent the liquid from flowing backwards.

5.4 Other operating precautions:

5.4. 1 The sealing water used for the stuffing box must be clean water, otherwise the spindle and stuffing will be damaged. If the packing is damaged, it should be replaced quickly according to the nature of the liquid.

5.4.2 Pay attention to the pollution degree of bearing lubricating oil at any time, and replace it every two weeks during initial operation. Be sure to check the degree of bearing wear. Uneven bearing wear is the main cause of vibration.

5.4.3 Long-term operation of the pump far from the design point must be avoided.

5.4.4 Avoid closing the outlet valve and running for a long time, otherwise the water temperature will rise and steam will be generated.

5.4.5 In the climate where liquid is easy to solidify, discharge the liquid. When the operation needs to stop, open the drain cock at the bottom of the machine body.

5.4.6 When the outlet valve is closed and operated for a long time, the temperature in the pump body will rise. If the temperature continues to rise, the pressure will increase to the point where it cannot be loaded, and the pump body will burst, which is quite dangerous.

6 Long-term shutdown treatment:

6. 1 Cut off the main power supply.

6.2 Remove the residual liquid in the pump.

6.3 Please apply antirust oil to the rust-prone parts of the pump.

6.4 Run for three to five minutes every half month.

6.5 Please follow the operating instructions when reusing.

7 Regular inspection and maintenance projects:

7. 1 check the shaft seal, pressure, bearing, current and screws of each part every week.

7.2 The devices of inlet vacuum gauge and outlet pressure gauge are very convenient to use and maintain. It is closed at ordinary times, and then opened when measuring.

7.3 Inject proper amount of butter into each butter nozzle every month.

7.4 If there is any abnormality in the operation, please stop and check immediately, and then continue to use it after troubleshooting.

7.5 For the pumping of high-temperature liquid, the gaps between different parts should be properly coordinated. Please contact our company for details.

7.6 Maintenance of packing and mechanical shaft seal:

7.6. 1 packing: the function of packing (tightening) is to prevent the shaft seal from leaking, and its maintenance directly affects the performance and shaft life of the pump. Attention should be paid to the following matters:

A) When the packing is worn after long-term use, it needs to increase the number of turns or completely replace it.

B) A small amount of packing leaks during operation, which is beneficial to lubrication and does not need to be locked frequently.

C) When locking the packing, it is best to stop and adjust it evenly, not unilaterally, so as to avoid the packing cover getting stuck in the shaft or even the gland breaking.

D) When replacing the packing, the old packing must be taken out, and the stuffing box should be cleaned without residue.

E) When packaging, the incisions of the package should be closely connected, and each circle of incisions should be staggered by about 120 degrees, which are not in the same straight line.

7.6.2 Mechanical shaft seal: When using mechanical shaft seal to prevent leakage, it must be fully maintained, so as to prolong the service life. Precautions:

A) It is absolutely forbidden to rotate in space-time without liquid.

B) Welding slag, iron filings and sundries in the pipeline must be removed to prevent them from entering the pump and shaft seal.

C) Turn the pump by hand to ensure that there is no abnormality in the pump, and then start the pump.

D) Be sure to prevent the liquid in the shaft seal from solidifying, so as not to damage the shaft seal.

E) When the operation is stopped for a long time, be sure to remove the liquid in the shaft seal and rinse it clean.

8 Troubleshooting:

8. 1 Cannot lift water:

A) the pump is not filled with water.

B) the speed is lower than the rated speed.

C) The lift of the system is too high.

D) the entrance height is higher than the original design.

E) impeller is blocked.

F) reverse operation.

G) air leakage in the intake pipe.

H) The stuffing box leaks into the air.

I) The inlet and outlet are blocked or the bottom valve is stuck.

8.2 Water shortage:

A) the air inlet pipe or stuffing box leaks.

B) the speed is lower than the rated speed.

C) The lift of the system is too high.

D) NPSH(a) is insufficient.

E) the entrance height is higher than the original design.

F) the inlet pipe is blocked.

G) When using high temperature or volatile liquid, the suction lift is not enough.

H) The bottom valve is too small or the bottom valve is faulty.

I) impeller is blocked.

J) the impeller is damaged.

K) The immersion depth of the bottom valve or the bottom of the water inlet pipe is not enough.

L) reverse operation.

8.3 Insufficient pressure:

A) the speed is too low.

B) The lift of the system is too low.

C) gas is mixed in the liquid.

D) damaged impeller.

E) The outer diameter of the impeller is too small.

F) reverse operation.

8.4 Small suction range:

A) the inlet pipe leaks.

B) the filler leaks into the air.

C) entrance height is too high or NPSH(a) is insufficient.

D) damaged impeller.

E) the body lining is damaged.

F) the inlet pipe is blocked.

8.5 horsepower overload:

A) the speed is too high.

B) the head of the system is lower than the rated value.

C) The specific gravity or viscosity of the liquid is too high.

D) The current increases with the decrease of voltage.

E) bending deformation of the shaft.

F) The packing cover is locked too tightly.

G) The rotating element is too tight.

H) wrong choice of pump.

I) reverse operation.

8.6 horsepower is too small:

A) Impeller blocked, unable to deliver water.

B) the inlet side is blocked.

C) no liquid idling.

D) Bottom valve failure and insufficient fuel injection.

E) the pressure is too high and the water volume is small.

8.7 bearing temperature overheating:

A) The circulating oil is not complete enough, and the circulating system is poor.

B) insufficient oil.

C) The lubricating oil is of poor quality and contains impurities.

D) too much butter.

8.8 Abnormal readings of pressure gauge, vacuum gauge and ammeter:

A) When the pressure is too high:

A) pressure gauge failure.

B) the actual lift is greater than the design lift.

C) the outlet is blocked.

B) When the pressure is too low and the vacuum is too low:

A) the speed is reduced.

B) impeller is blocked.

C) reverse operation.

D) air leakage.

E) the actual lift is less than the design lift.

Insufficient npsha.

G) damaged impeller.

C) When the pressure is too low and the vacuum is too high:

A) the water level drops.

B) the inlet pipe is blocked.

C) bottom valve failure.

D) liquid viscosity change.

D) ammeter is not normal:

A) When it is too high:

The voltage drops.

Internal failure of the pump.

The frequency rises.

B) When it is too low:

The voltage rises.

There is too little water.

Idle.

The air leaked in.

E) the pointer swings irregularly:

A) pitting occurs.

B) air leaks to the suction side.

C) the entrance loss is large.

8.9 Vibration and noise:

A) mechanical reasons:

A) spindle bending.

B) poor installation.

C) the coupling is damaged.

D) damaged impeller.

E) bearing damage.

B) hydraulic reasons:

A) pitting occurs.

B) inhale air.

SKH ontology decomposition and assembly process

The assembly steps are as follows: (Part number of construction drawing)

1 bearing and shaft combination 9000 and 2 10

2 Bearing seat installation 500

3 Clearance adjustment bolt installation 9903

4 Install the water retaining ring 94 10

5 Packing cover and middle seat combination 9906 and 1 10

6 Combination of intermediate seat and bearing seat 1 10&500

7 impeller installation 200

8 impeller key installation 90 15. 1

9 Installation of impeller fixing washer 92 16

10 impeller fixing nut locking 9205

1 1 press fit 400

12 Chassis Installation 100

13 Add filler 9430

14 key installation 90 15

15 coupling installation

Decomposition is the reverse of the above steps, and the packing and the packing cover can be removed.