Pipeline pump maintenance, please note the following knowledge

Key points for rapid maintenance of pipeline pump:
1) every 500 hours of operation, should release the sealing plug seat, out of residual oil cavity with a syringe; added to the sealed cavity qualified 20 mechanical oil to the cavity half of the volume (add the appropriate method: the oil quantity of running pumps, oil can not smoke outside); plug tight to prevent leakage occurred.
2) it is found that the motor mechanical noise increases and the temperature rise of the bearing is abnormal, and the lubrication condition of the motor bearing should be checked. Such as grease discoloration, dirty should be replaced in a timely manner.
3) when there is leakage sealing seat, you can release the sealed plug seat, running pumps, oil field and aviation fuel smoke flavor can be determined: mechanical seal failure. Stop using the pipeline pump for quick replacement of mechanical seals.
Method for replacing failure mechanical seal with 4:
(1) table ready to place the pump parts (ground) and disassembly tool, do not leave around any indiscriminate use, so as not to damage the pump parts.
(2) confirmed before the overhaul in the electrical state; unscrew the gas plug, with Straw put the oil seal seat cavity aspiration.
(3) demolition of the fractional coupling: the first coupling of the fixed six angle screws, and then gently pull the shaft coupling half from the shaft slowly down (note not to fall off). Use plum blossom wrench shaft fasten bolt and block the impeller to the pump body slowly sink, remove the other half of the coupling, pump shaft with ring.
(4) demolition sealed block: block compress sealed screw nut and gently remove seal seat (Note: do not destroy the seat of rubber oil seal) and cleaning.
(5) removing and cleaning bearing: first gently loosen bearing seat after the demolition of the top bearing bolts, and put up along the shaft and unloaded; with jet fuel cleaning bearings and a pre loaded and dry coated with a little 20 mechanical oil lubrication protection.
(6) removal of mechanical seals: to seize the seal spring along the pump shaft to lift, you can remove.
(7) mechanical seal assembly: in the dynamic and static ring surface coated with a layer of clean 20 lubricating oil; add lubricant bearing guided, first gently positioning ring static load bearing guide; then on the pump shaft with lubricating oil, the mechanical seal ring part gently into the pump shaft on the seal ring should be retractable hand push (note that dynamic and static ring part rotation preventing part assembly in place).
(8) to install the sealing seat: the seal seat is first filled with rubber oil seal, and then the sealing seat into the pump cover and press on the bearing seat, tighten the nut.
(9): the first coupling ring on the motor shaft mounted on the head, with half of the coupling, then the pump shaft end and coupling slot is arranged on the block and plum wrench tightening bolts (lifting shaft 3~5 mm and pre-stressed mechanical seal); the other half of the coupling screw angle of six screws and then loaded on to tighten. Installation of coupling the correct inspection requirements: the fraction of the gap between the joint clearance is uniform; the number of dynamic coupling with the hand disc to check the rotation flexible.
(10) according to the point of use test run to check the replacement of mechanical seal is correct, the pump group is normal operation.

Analysis on the reasons of overload of stainless steel submersible pump

Stainless steel submersible pump material both stainless steel or cast iron, motor overload are Never mind and material, so what are the reasons lead to the submersible motor overload, we analyzed the following points:
1, the power supply voltage is too low
The submersible pump is lower than in the rural areas in more rated voltage under the conditions of operation, the current in the stator windings more cause stator winding temperature rise increased and more overheating burn out.
2, pump type selection
The actual use of the load conditions and the choice of submersible pump form does not match; the choice of the submersible pump head is too high or too low.
3, mechanical failure
Stainless steel submersible pump bearing damage, the stator and rotor friction "sweeping" aquatic or water pump impeller and other debris stuck and mechanical failure will cause the submersible sewage pump stator winding.
4, manufacturers or repair of quality factors
Stainless steel submersible pump manufacturers and repair the quality of the cause of the submersible pump overload.

Submersible pump abrasion resistant surface protection technology requirements

Study of metallic coatings
Protection technology in submersible pump abrasion resistant surface is also widely used in metal surface protective layer. Use the most is the welding rod and wire coating. Using the welding method of stainless steel welding rod can ensure the welding layer and the substrate has a high bonding strength, but the dilution rate of welding process is large, and the thickness of the welding layer is not uniform and the machining allowance is large. By surfacing welding process of the surface of the submerged pump blade, the general in the welding department did not happen before the cavitation damage, the solder joints around the pile and the rapid occurrence of new cavitation damage, until the bottom of the surfacing layer. The stainless steel spray coating formed by wire spraying is mainly based on mechanical bonding, which is not suitable for the shock loading and anti cavitation of the submersible pump. For some large submersible pump such as the workpiece, large diameter (diameter 3 meters) axial flow pump impeller chamber, can be embedded in the surface layer of stainless steel to increase abrasion resistance. But this method will be sent to a large workpiece submersible pump factory specialized in processing, cutting, welding, mosaic, expensive, long cycle, non general submersible pump can pump out. Alloy powder coating is developed on the basis of on-line material spraying. Compared with the welding process, the formation of beautiful appearance, easy to control the thickness, the dilution rate is small, the method is simple, the heat source is easy to get, processing is not affected by climate, site restrictions. But because the spraying layer is composed of high speed jet to semi molten alloy powder particles on the surface of the substrate layer is formed by stacking rules, which belongs to the layered structure, with the direction of their physical characteristics, and in the spraying process, each powder particles are condensation occurs, shrinkage and deformation phenomena and development a kind of internal stress in the coatings, the alloy powder coating generally used for small and medium sized submersible pump cavitation and abrasion of the surface protection is not too serious.
Surface protection materials and process requirements
The material surface protection technology must have 1 anti abrasion coating: (1) high strength and hardness, resistance to cavitation abrasion; (2) has a toughness, to absorb impact energy; (3) has a very high bond strength, to ensure that the coating in the pump high speed impact the water 30-35 meters per second without peeling; (4) coating material must be moderate in price, in order to ensure the promotion and use in large and medium-sized submersible pump and the large volume of rural small submersible pumping station; (5) coating material should be non-toxic, non flammable, explosive materials, convenient storage and transportation, do not pollute the surrounding environment.
The processing requirements in order to ensure the promotion and application of surface protection technology, processing technology must be: (1) has the advantages of simple process, can have different degrees of the operator; (2) used in processing tools (appliances) should be in the market to buy or is necessary for general pump maintenance work, and the price is moderate, without special and expensive equipment; (3) the process should not be affected by the seasons and the surrounding environment, to ensure the pump station in winter and spring maintenance periods; (4) coating does not require special maintenance, after coating can fast curing or put into use, to shorten the maintenance period.
Development of alloy powder spray welding technology
Spray welding technology is a kind of metal surface protection technology developed on the basis of spraying and surfacing with the development of the low melting point powder material. The spray layer through the remelting process, coating density without holes, smooth surface, has the advantages of material saving, good quality and high efficiency, the surface hardness of spray welding layer can be as high as HRC60-70, can flow part several times or even ten times to extend the service life of the pump, diving.
Optimization of spray welding alloy powder materials
The optimal points in order to ensure the quality of spray welding layer, prevent workpiece deformation and cracking of the coating, coating materials research technical route optimization: (1) through the optimized size, particle size, phase change hardening and the number of crystal grain size, in order to obtain a reasonable organization form and distribution structure. (2) according to the characteristics of submersible pump cavitation, abrasion, the performance index to adjust the material, can ensure material with excellent abrasion resistance, and can minimize or reduce the cracks, improve the weldability. (3) to determine the reasonable technical parameters and process parameters, to improve the condition of the use of the coating.

The choice of the submersible pump in the fountain pump before use!

Fountain pump in the use of the submersible pump is very important, should be based on the actual situation of water and the working time and the amount of water required to select the type of pump. Fountain dedicated pump experts teach you how to use the submersible pump:
1. The use of the fountain pump submersible pump environment requirements:
1, there is a safe and reliable power supply.
2, the outlet of the water tank and the gap is smaller than the head.
3, to choose a relatively clean water.
Two. Start
11, 1 kilowatts of submersible pump allows direct start. More than 13 kilowatts of submersible pump should be equipped with a buck starting cabinet. To protect the safe operation of the submersible pump.
2, in order to avoid the submersible pump rotor transient and reduce the starting load. Submersible pump should be started when the exit valve travel to 3/4. 1/4 air gap. In order to bleed) to start after the opening of the water slowly open. To the pump operating point control in the appropriate location.
3, after the start of operation. Monitoring and observation of water level changes should be strengthened. Ensure the submersible pump to operate within the range of working conditions. To be submersible pump running smoothly before the official operation can be put into operation.
4, submersible pump for the first time 5 hours after the operation. Quickly measure the thermal insulation resistance. Its value is not less than 0.5M. Can continue to use.
Three. Operation
1, fountain pump submersible pump should be working in the design point. At this time the axial force is moderate. Fountain pump research found that in the design of the work of the highest efficiency. Most economical and reliable.
2, fountain pump submersible pump to run every 8 hours to a comprehensive inspection. Each meter has no change. Circuit node is hot. Sound is normal. Whether the normal operating current is greater than the rated value of the motor brand name.
Four. Stop the pump
Fountain pump before the submersible pump down. To prevent water from flowing backwards. Fountain pumps remind you: the power to cut off at the same time to close the valve. Restart time every 20 minutes or more.

Which methods can reduce the energy consumption of the sewage pump?

Sewage pump for the discharge of urban sewage, in our daily life plays a very important role. But the use of the sewage pump will consume a large amount of energy, today is the era of energy saving and emission reduction, reduce the energy consumption of the sewage pump is an important project, what method can reduce the energy consumption of the sewage pump effectively?

First, the internal surface of the sewage pump and the pressure of the interior surface of the water. The surface rust embossing will pump water reducing 7%-8%; maintenance only steel and iron brush paper or grinding smooth, you can make it at work to reduce fuel consumption or power consumption of 9%-14%.

Two, sealing ring gap increases. According to the test, when the gap in the direction of impeller radius increases 4 mm, the water pump will be reduced by 10%; only organic adhesive added back to the factory line asbestos clearance requirements for maintenance, so you can pump at work to reduce fuel consumption or power consumption of 10%-12%.

Three, the pressure water chamber and the axis of the impeller does not coincide. According to the test, when the water pressure chamber and the impeller axis deviation from the 2 mm or greater than 2 degrees, the water pump will reduce the 5%-6%; maintenance, just measuring carefully, carefully identify the location of axis coincidence loaded solid, can pump at work so that the oil or reduce power consumption by 6%-7%.

Four, blade installation angle is not consistent. When the blade angle is different, the water pump will be reduced by 5%; maintenance, the perspective of quasi foot capacity, the installation position and firmly, so you can pump at work to reduce fuel consumption or power consumption of 5%-6%.

Taking the above four methods can effectively reduce the energy consumption in the use of the sewage pump, and improve the working efficiency of the sewage pump.

Four strokes teach you to improve the performance of the use of sewage pump

With the continuous development of society and the continuous improvement of people's living standards and the continuous strengthening of environmental awareness, the sewage pump has been familiar with, and its application has become more and more broad. How to improve the performance of the sewage pump has become the most common problem, then how can we improve the performance of the sewage pump? Here to teach you four strokes:

Improve the reliability of sealing

Double face mechanical seal to ensure the normal operation of the pump, and using the model to cast corrosion wear resistant material resistance, the double face mechanical seal can make the water safe operation of more than 3 times longer than usual.

Bearing service life extension

The quality of bearing lubrication is a prerequisite to ensure the normal operation of the water pump can get sufficient lubrication, bearing the bearing friction, abrasion resistance, rust proof, sealing will have a certain impact bearing damage, there are a large part of the lubrication is not good enough and cause, so good lubrication will increase the use of bearing life.

Cavitation

Reduce cavitation by changing the pump run time environment, in addition, the use of anti cavitation material pump in the pump casting process can effectively reduce the occurrence of cavitation, cavitation can also be sprayed gas on the surface, the surface hardness is improved, can very good protection.

Motor life

To prolong the service life of the motor, the motor is regularly maintained, this method can not only save the cost of the user, but also extend the service life of the pump.

Sewage pump head selection is not the bigger the better

To determine the ideal lift sewage pump design of the pump with special terms called the design point lift, today the major share is the sewage pump head too big consequences, also is to remind the Rui innovation of old users, sewage pump lift when the choice is not the bigger the better.

Sewage pump selection head below the design point lift (ideal head design to determine the use of a pump), business dealings in Switzerland are often some users violate, most users mistakenly think that the sewage pump head selection is better, in fact.

Case 1, a number of users in the sewage pump selection, the pump head is too high, but the actual use of the environment is to reduce the use of head.

Case two, the sewage pump in the use of the operating point is not easy to determine, in general, that is, the flow of the sewage pump needs to be regularly adjusted.

Case three, some of the sewage pump using the environment is not fixed, often need to change the location of the use of.

These three cases are likely to cause sewage pump overload, and ultimately affect the reliability of the sewage pump. In summary, the sewage pump head is not the bigger the better.

The performance and application of the inventory of the sewage pump

Sewage pump is a non clogging pump, with a variety of forms such as diving and dry two, most often the submersible WQ type submersible sewage pump, sewage pump is the most common type, such as W type horizontal and WL vertical sewage pump sewage pump two. Mainly used for conveying city sewage, manure or liquid containing fiber, paper and other solid particles of the medium, medium temperature is generally not more than 80 DEG C.

Because of the transmission of the medium containing a filament winding or poly fiber. Therefore, the pump flow channel is easy to plug, once the pump is blocked will make the pump can not work, and even burning motor, resulting in poor sewage. To urban life and environmental impact of a serious. Therefore, the anti blocking and reliability is an important factor in the quality of the sewage pump.

Water pump is an application name, in fact, the rubber lining of slurry pump used as horizontal sewage pump is very good. In the treatment of industrial waste water, due to the sewage containing acidic or alkaline substances, the use of rubber lined pump is very wide. According to some application cases of pump pump, lining rubber sheath, metal rubber pump impeller, high pressure pump can achieve efficient metal, and can give full play to the corrosion resistance of rubber material. In city wastewater treatment, usually in the sewage treatment pool, will add a filter, the fiber material stopped before stalking the suction port of the pump, which can not enter the pump cavity, so that the pump can work better, longer life.

Understanding of the performance and application of the sewage pump, in the daily use will be able to pay more attention to, but also to effectively extend the life of the sewage pump oh!