The use and maintenance of long shaft pumps, what causes long shaft pumps to pick

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1. The maintenance items can be determined according to the technical status monitoring data of the operation, and preventive inspections can also be carried out on a periodic basis to repair or replace the problematic parts.

2. When dismantling and replacing the main parts, the quality standards of major maintenance should be met.

Major maintenance items, content, and quality shall comply with the following provisions:

1) Remove scale and rust, and non-toxic water-resistant and anti-rust coatings can be applied to non-processed surfaces;

2) The cooling water hole, pressure gauge hole and exhaust hole should be unobstructed;

3) When the corrosion thickness of the shell wall or guide vane exceeds the original wall thickness 1 3, it should be repaired or replaced;

4) The shape and fitting tolerance meet the technical requirements of the drawings.

5) After the impeller is repaired or replaced with a new impeller, the static balance test should be done, and the allowable deviation of the static balance on the maximum diameter of the impeller is in line with the current situation.

6) When removing the static unbalanced weight, it should be ground evenly and kept smooth, and the maximum grinding thickness should not be greater than 1 3 of the original cover plate thickness

7) The fitting tolerance between the closed impeller and the shaft meets the H8 H7 fitting requirements in the current national standard "Tolerance and Fit";

8) The taper of the semi-open impeller and the tapered sleeve should be consistent, and the contact area should not be less than 60% of the mating area;

9) The operation clearance of the closed impeller sealing ring and the impeller, the single-stage double-suction centrifugal water pump shall comply with the regulations; Long-shaft deep well pumps and well submersible pumps should comply with the regulations. When the wear exceeds the specified clearance in the table by more than 50%, a new sealing ring should be replaced. 1. No need to adjust after installation.

2. No maintenance is required during operation during the design life.

Summary. Hello dear, thank you for taking the time to wait for me<> the so-called long shaft pump, which means that the shaft of the pump is longer than the average pump. The design of the long shaft pump is mainly to adapt to certain special working environments and requirements.

Here are some reasons why a long-shaft pump might be chosen: The distance between the pump and the drive unit is long and a long-shaft pump is required to better suit the layout of the equipment. The pump needs to be installed in underground environments such as deep wells or deep pits, and the use of long-shaft pumps can ensure that the mechanical parts of the pump will not touch the ground or water surface, so as to ensure the normal operation and service life of the pump.

Pumps need to work in high or low temperature environments, and the use of long shaft pumps can isolate the mechanical parts of the pump from the driving parts to reduce the impact of heat or cold transfer on the pump.

Hello dear, thank you for taking the time to wait for me<> the so-called long shaft pump, which means that the shaft of the pump is longer than the average pump. The design of the long shaft pump is mainly to adapt to certain special working environments and requirements. Here are some reasons why you might choose a long-shaft pump:

The distance between the pump and the drive unit required a long-axis pump to better meet the layout requirements of the equipment. The pump needs to be installed in underground environments such as deep wells or deep pits, and the use of long-shaft pumps can ensure that the mechanical parts of the pump will not touch the ground or water surface, so as to ensure the normal operation and service life of the pump. The pump needs to work in a high or low temperature environment, and the use of a long shaft pump can isolate the mechanical parts of the pump from the driving parts to reduce the influence of heat or cold transfer on the pump.

The pump needs to be used in the fields of chemical industry, medicine and other fields, and the long-axis pump can be bridged to produce a certain isolation effect between the mechanical parts of the pump and the driving parts, so as to reduce the contact between the pump and the medium and avoid the corrosion of the mechanical parts of the pump or the pollution of the medium. It should be noted that although the long-shaft pump has some special advantages, it is manufactured to have a high cost of seepage and defect, and special attention needs to be paid to some details when using, such as the strength, speed, torque and other parameters of the shaft, so as to ensure the normal operation and service life of the long-shaft pump.

Summary. Hello, it is a pleasure to serve you, first remove the front and rear bearing covers on the bearing box, and then use a wooden block to pad the shaft end of the impeller, and hit it with a hammer, you can disassemble the pump shaft and the bearing together. Generally, use a pull to remove the bearing from the shaft, pay attention to the hook of the pull to grasp the inner ring of the bearing, otherwise it is easy to pull the bearing ring.

Measures to replace the pump shaft.

Hello, it is a pleasure to serve you, first remove the front and rear bearing covers on the bearing box, and then use a wooden block to pad the shaft end of the impeller, and hit it with a hammer, you can disassemble the pump shaft and the bearing together. Generally, use a pull to remove the bearing from the shaft, pay attention to the hook of the pull to grasp the inner ring of the bearing, otherwise it is easy to pull the bearing ring.

Replace the twin wheel loops.

Large circulating pump. Does the impeller need to be heated?

Let the impeller heat up, so it's easy to replace.

It's a good match, and it's easy to remove.

1. Axial thrust bearing mode:

1) When the pump is driven by an ordinary vertical motor, the weight of the rotor and axial thrust of the pump are borne by the thrust bearing installed on the upper part of the pump.

2) When the pump is driven by a vertical motor with thrust bearing, the weight and axial thrust of the pump rotor are borne by the thrust bearing in the motor.

3) When the water pump is driven by a right-angle gearbox, the weight and axial thrust of the rotor of the pump are borne by the thrust bearing installed in the right-angle gearbox.

2. Lubrication of thrust bearings: thrust bearings are generally lubricated with thin oil (small pumps can also be lubricated with grease). A cooling jacket can be set on the outside of the bearing body, and the oil temperature can be cooled by cooling water.

3. Lubrication mode of guide bearing: self-lubrication: if the medium conveyed by the water pump is a clean liquid, the guide bearing can be directly lubricated by using the conveyed medium.

External pressure water lubrication: If the medium conveyed by the pump contains a small amount of impurities, it needs to be lubricated by clean pressure water from the outside (the pump has a self-closing sealing system, and the self-closing sealing system can prevent impurities from entering the guide bearing after the pump is stopped).

3. Installation method: Generally, the pump unit is installed on the same base layer.

4. Location of the water outlet: Under normal circumstances, the water outlet is located above the base layer, and it can also be located below the base layer if the user needs. (1) Weld the bench of the new submerged pump with the manhole cover.

2) Bolt the flange on the bench to the flange on the pump head.

The long-axis submersible pump is suitable for conveyor belt particles, high viscosity, strong acids, alkalis, salts, strong oxidants and other corrosive media. The new crude positive submerged pump is suitable for conveying a variety of lightweight media such as flammable and explosive. The shell, outlet pipe and flow parts of the traditional submerged pump are all made of corrosion-resistant materials, the motor part is placed on the liquid level, and the pump part is placed under the liquid level, which has the characteristics of strong corrosion resistance, no clogging and high temperature resistance.

The pump body, motor and overflow parts of the new submerged pump are all made of special materials, and the motor part and the pump part are coaxially connected as a whole and placed under the liquid level, which has the characteristics of maintenance-free 1, high rock regret explosion-proof, zero area use, and low energy consumption.

The long-shaft pump is a kind of centrifugal pump, and from the perspective of centrifugal pump, it is improved in the performance of the submersible pump, which can be used to transport rainwater, iron oxide water, sewage, corrosive industrial wastewater, seawater and other liquids. It is widely used in water supply companies, sewage treatment plants, iron and steel plants, mines and other industrial and mining enterprises, as well as municipal water supply and drainage, farmland irrigation, flood control and drainage projects.

The long-axis pump is mainly used to transport clean water and sewage containing certain solid particles (such as iron filings, sand particles, pulverized coal, etc.), corrosive industrial wastewater, and seawater. It is widely used in primary water treatment plants, sewage treatment plants, metallurgical iron and steel industry (especially in the industry whirlpool to transport iron oxide water), power plants, mines, municipal projects and farmland water conservancy projects. The motor and the pump are coaxially connected, which is composed of the pump body, the pump head, the connecting pipeline and the control device, the pump body includes the shielded motor and the centrifugal pump, the motor and the centrifugal pump are coaxially connected, and the external suction cover forms an inseparable whole

The ExSDIB4 standard is designed to be Class GA equipment [3], which is suitable for use in the zero zone. The main advantages of the design are: the bearings of the pump are only a few hundred millimeters, there are no long shafts, there are no swing problems, the operation is smooth, the sound is low, and there is almost no wear.

The parts in contact with the medium are generally made of special materials, and are widely used in chemical plants, pharmaceutical plants, factory production lines, generator sets and other flammable and explosive media transportation places.

Summary. Causes: The reasons why the long-shaft pump cannot vibrate include motor or power supply system failure, foreign matter in the rotor parts, bearing jamming, and unsatisfactory starting conditions.

The solution: to overhaul the motor or power supply system, clean the rotor components, clean or replace the bearings, check that the conditions that should be met are insufficient flow or no water. 2. Insufficient flow or no water Reason:

Generally, there is debris blockage on the suction side or outlet side or impeller, excessive wear of the sealing ring, damage to the impeller, wrong steering, too low accommodation, insufficient flooding depth, and inhalation of air.

Hello, it is my honor to answer your questions about what reasons for the long shaft pump can not be provoked, and the following is the solution, I hope to help you.

Reason: The reasons why the long-shaft pump cannot vibrate blindly include the failure of the motor or power supply system, the presence of foreign objects in the rotor parts, the stuck bearing, and the unsatisfactory starting conditions of the Huiqing family. Workaround:

It is to overhaul the motor or power supply system, clean the rotor parts, clean or replace the bearings, and check the conditions that should be met, insufficient flow or no water. 2. Insufficient disadvantages or no water before flow Reason: Generally, there are debris blockages on the suction side or outlet side or impeller, excessive wear of the sealing ring, damage to the impeller, wrong steering, too low accommodation, insufficient flooding depth, and inhalation of air.