SLD series horizontal multi-stage pump

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Product outline
SLD single-suction multi-stage sectional-type centrifugal pump is used to transport the pure water containing no solid grains and the liquid with both physical and chemical natures similar to those of pure water, the temperature of the liquid is not over 80 ,suitable for water supply and drainage in mines, factories and cities.
Note: Use an explosion-proof motorwhen used in a coal well.
This series pump comply with the standards of GB/T3216 and GB/T5657.
Performance range
Capacity(Q) 25-750m³/h
Head(H) 60-1798m
Pump structure
Model SLD pump consists of four parts, stator, rotor, bearing and shaft seal:
1.Stator consists of inlet, middle and outlet sections and the guide vane etc., with the take-up bolt tightly clamping all sections to form a working room. The inlet of it stands horizontally while the outlet vertically upward.
2.Rotor consists of the shaft, impeller, balancing disk and muff etc., the shaft passes the power to the impeller to have it work; the balancing disk balances the axial force; and replaceable muff is mounted on both sides of the shaft to protect it.
3.There are rolling and sliding bearings:The rolling bearing consists of bearing seat, bearing and bearing gland and uses grease for lubrication.The sliding bearing consists of bearing body and cover,liner, dust-proof disk, oil leveller, oil throwing ring etc., and uses thinned oil for lubrication.
4. The shaft is sealed with stuffing and the shaft seal consists of the sealing contents, stuffing, baffle. The liquid in the sealing work-room functions water-sealing, watercooling and water lubricating and the water for watersealing comes from the pressure water inside of the pump.Mechanical seal can also be used upon the requirement of client.
In addition, the pump is directly actuated by the prime mover through the elastic clutch and, viewing from the prime mover, moves CW.

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Q:Installation position of check valve for water pump
Check valves must be installed at the pump's exit and position before the outlet control valve for servicing the check valve.Jiang Yuanyuan 1985's statement has a problem:1. On the flow of water, because the fluid is continuous and incompressible, the water in any part of the pipe will not flow as long as it is cut off in any position in the pipe.2, self suction exhaust is formed within the pump in outlet pipe, check valve installed in the inlet, because the pressure is low, is not conducive to automatically open the check valve, and its resistance, easy to form a vacuum pump and cavitation.
Q:37KW how many contactors does the pump need to start directly?
First of all, you have to see what voltage you use If 380V then current per KW is about 2A, if it is 660V per KW at about 1.1A, then it is the starting current is 3 to 7 times for the starting current, but for the moment, 380V voltage: 37*2=74A 100A on the line, 660V voltage: 37*1.1=40.7A 63A on the line.
Q:Pump impeller diameter plus assembly what changes? What's the effect on the motor?
Two item 1.5 kilowatt type self suction pump original impeller 14.7cm installed 15.5cm may be a problem.After the impeller increases, the flow, head, shaft power will increase (increase in volume see the following formula), the original 1.5KW motor may overload operation.The larger the diameter of the impeller, the greater the lift, the greater the flow rate, because the flow rate of water depends on the centrifugal force generated by the impeller rotation and the line speed on the tangent. The greater the diameter, the greater the centrifugal force and the linear speed. The relationship between the centrifugal pump water delivery and the vacuum degree is that the centrifugal pump is the centrifugal force principle to complete pumping. Without water, the time and space turn will burn out the equipment. Vacuum pumping or vacuum pumping two times.The vacuum of the inlet of the centrifugal pump is composed of three parts (the equation of the inlet of the pump and the level of the suction liquid).
Q:1 water pump frequency converter constant pressure water supply wiring diagram
This is a Fuji inverter, water pressure sensor, if it is remote pressure gauge, connect 11, 12, 13 ends, if the pressure transmitter 11 and C1 end
Q:Relationship between pump voltage and lift?
In the case of power, W=F*S. That is, the work done per unit time pump = the gravity of the water flow * the displacement of the waterIt can be seen that:1, the power is certain, the head and the flow is inversely proportional.2, the greater the power, the greater the product of the head and flow.Therefore, when the flow is minimum, the pump head is the maximum; when the head is the minimum, the flow is the maximum.
Q:Submersible pump reverse impact on the pump
Small amount of water, large current, long running time, easy overheating, or even burning pump.
Q:Water pump motor often inlet
You are immersed in water or oil pump pump, if flooding do not be afraid, if you put oil thread wrapped with waterproof tape, general water pump inlet is in the end, you want what the price of copper or aluminum pumps, the price is basically the same, do not buy too cheap water pump
Q:What is the reason that the centrifugal pump outlet pressure decreases and the operating current increases?
The reasons are as follows:(1) motor guide bearing wear, water pump rubber bearing wear, sealing ring wearMotor or water pump bearings wear, will make the submersible pump in the machine on the wrong state of work, serious damage to submersible pumps, stator windings burned. The method is to repair or replace damaged bearings and bushings.(2) thrust bearing wear, submerged pump impeller and lower cover wearThis situation will also make the submersible pump on the machine in an abnormal state of work, serious damage to the submersible pump. The treatment method is to check the cause of the wear of the thrust bearing. Whether the mechanical seal of the shaft extension is damaged or not, which causes sand particles and impurities to enter the inner cavity of the motor, causes excessive wear of the thrust bearing. If it is caused by the mechanical seal of the submersible pump, the replacement of the thrust bearing, thrust plate and impeller, lower cover plate and other parts shall be replaced by mechanical seals at the shaft extension end.(3) the flow of the submersible pump is too large or too smallThe use of submersible pumps flow beyond the scope of use will make the motor overload of centrifugal pump or mixed flow pump, excessive flow, the pump shaft power increases, the motor overload; for the axial flow pump, the flow is too small, the pump shaft power increases, the motor overload. The treatment method is to adjust the valve properly, reduce the flow rate of the centrifugal pump or the mixed flow pump (increase the axial flow pump), and make the flow of the pump in the normal range of use.(4) the shaft of the submersible pump is bent and the bearings are not concentricThis is a serious case of submersible pumps, should be immediately overhauled, straighten the bent shaft, replace the unqualified bearings, re assembled submersible pumps.
Q:How can the pump be stationary?
1, the pump can move under the premise of turning disc. Pump should be empty load start, that is, in the closing of the export valve in the state of start, there will be no rotation of the situation.2, look at the voltage of the circuit is normal, whether the lack of phase.
Q:What's the submersible pump?
Centrifugal pump, a general motor and pump body is one, you can pump the whole pump into the water

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