QJD, 0J Multistage Deep-well Submersible Pump

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Production Introduction:
QJD. QJ Multistage Deep-well submersible pump consists of motor and multistage pump.The pump consists of impeller,vane,pump body, inlet flap,outlet flap,shaft and bearing.The motor is applied with double -face mechanic sealing with"0" shaped rubber ring as static sealing.

Application:
This series pump is extensively used for electrical irrigation, forest water spraying, water pumping from well, water tower deliver and urban construction water supply and discharge for farms, villages, industrial and mining enterprise.

Condition of usage:
The pump can work properly and continuously under following operational conditions:
1.Medium is not corrosive .Sand contents should be max.0.10% by volume and granular size should be max.0.20mm.
2.Medium temperature shouldn’t be over 40*C and PH should be 6.5-8.5.
3.The pump should be opera ted within rated head. The pump should be min.0.5m over the water bottom and not be inserted into sludge.
4.Power frequency should be 50Hz,single phase voltage 220V,three-phase voltage 380V, and voltage fluctuation should be 0.9-1.1 times than the rated.

Q:Household automatic booster pump, how much pressure to work automatically, the water pressure and how many kilograms?: Start the pump. Water pressure depends on how large you buy the pump, generally small, mostly 10-15 meters hydraulic pressure, about 200 of the price.

Q:What are the reasons for sealing damage of centrifugal pumps?: The reasons for sealing damage of centrifugal pumps are as follows: six, the specific contents and handling methods are as follows:First, the centrifugal pump water quality is poor, containing particles.As a result of poor water quality, containing small particles and medium hydrochloride content is high, forming abrasive wear, centrifugal pump seal plane or pull the surface, resulting in groove, ring groove and so on.Treatment method: improve water pressure or medium, replace machine seal.

Q:What is the principle of a turbopump?: The working conditions of the turbine are different from those of the medium used, so the structure of the turbine is varied, but the basic working principle is similar. The most important component of a turbine is a rotating element (rotor or impeller) mounted on a turbine shaft with blades uniformly arranged along the circumference. The energy of the fluid is converted into kinetic energy in the flow through the nozzle, and when the fluid passes through the rotor, the fluid impacts the blade and drives the rotor to rotate, thus driving the turbine shaft to rotate. The turbine shaft drives the other machinery directly or through the transmission mechanism, and outputs mechanical work.

Q:What is the pump lift voltage? And how to suppress the pumping voltage rise?: The elevator is mainly used by the power grid through the rectifier, filter, inverter and other transmission to the motor. The motor in high speed when the brake suddenly, but the rotor of the motor with the load (production machinery) mechanical inertia, could not stop quickly, resulting in the back EMF (EU voltage) motor is in the state of power, the reverse voltage and torque original electric state torque instead, and the motor with brake strong torque, forcing the rotor to stop fast but usually AC-DC-AC converter is the main power AC/DC rectifier circuit is irreversible and therefore cannot go back to the grid, energy will be accumulated in the filter capacitor, produce pump voltage, this phenomenon of pump voltage converter has great destructive power.

Q:Know flow and lift how to calculate the pump power?: N=Q.H.g. P / nN - motor power, kWH - pump head, MQ - pump flow, m^3/sG - gravity acceleration g=9.81

Q:You'd better point out the details.... There are 2 best ways of experience and formulaCan you say a simple point, such as multi-stage pump, when the pump is higher than the motor, 30 wire is the next mouth how to do?: Alignment methods and requirements:1, check two feeler dial gauge or flange coupling the parallelism, usually with clearance between the both ends of the side instead of difference, in the circumferential direction every 900 measure, the maximum and minimum gap gap difference (Ab) less than or equal to 0.3 mm.2, the coupling flanges outside the park up and down, left and right four position to check whether they are in the same line, C less than or equal to 0.1 mm.When looking for a positive C, it will affect (a - b), finding the right (a - b) will affect the C, to balance each other. It's easier for an unskilled comrade to find C (a - b) first, and then find a positive one. Through the adjustment of the motor at the foot of the gasket thickness (Ab) and meet the requirements of C.Check the inlet and outlet piping before alignment. Make sure the weight of the inlet and outlet pipe does not exert force or torque on the pump. When looking for, should also pay attention to eliminate the pump rotor movement, so as to avoid the end gap error. If checked after the pump is working, it should be carried out under cold condition.It is important to draw attention to the fact that the pump set of the complete set of factory is only rough looking (checked with a ruler) when it is shipped. It may cause displacement when it is transported.

Q:Fire hydrant pump button, under what circumstances do not need to install?: The installation of hydrant pump buttons depends on the type of water supply:(1) municipal water supply; (in this case, do not have to install)(2) there is a fire pump; (must be installed)

Q:Filter backwash pump for what use, what is the principle of work ah?: But the reverse cleaning can not completely regenerate the filter medium, or there will be some impurities remain, when the regeneration of residual impurities (pressure drop) to set the value, you need to replace the filter (filter media).

Q:What is the function of a submersible pump?Do you have any knowledge about submersible pumps?.: Important equipment for deep well water extraction. When in use, the whole unit dives into the water. The extraction of groundwater to the surface is water, mine rescue, industrial cooling, irrigation, water lifting, ship ballast, also can be used in fountain landscape, hot water submersible pump for hot spring bath, but also can be applied to the extraction of groundwater from wells, can also be used in rivers, reservoirs, canals and other water projects. The utility model is mainly used for farmland irrigation and water for human and livestock in mountain areas, and can also be used for central air conditioning cooling, heat pump units, cold pump units, cities, factories, railways, mines and site drainage. General flow can reach (10m3~650m3) per hour, head up to 1500 meters.

Q:Water pump can not be pumped out, how to maintain water?: Water pump does not suck or does not drain:The causes for the valve stuck, part of the blockage of water, high water or water leakage is too high, may also turn right, impeller blockage. After checking through them one by one, can be taken at the end of valve repair, clear blockage and correct steering, cleaning and other measures to deal with the impeller.The purpose of the work is to pump water from one place to another, or increase the pressure to control the mechanical energy into fluid energy.

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