Mining Pump

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5000 unit/month

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Description

DF(S)-type mining use wear&corrosion resistent centrifugal multistage pump has features of anti-cavitation,high efficiency,energy conservation,reliable and service long life.Especially applied in mine drainage,pumping solid particle content which is not more than 5%(particle diameter is less than 0.5mm)mine water and other similar liquid.

The pump follows the standards of ISO、API、GB、ASTM and JIS.

Application Area

■ Salt manufacturing industry

■ Seawater desalination

■ Process industry

■ Power plant

■ Chemical and petro-chemical industry

Performance Range

Capacity:230-666m3/h

Head:158.3-1153.3m

Matched Power:N=280-2240 kW

Medium Temperature:≤105℃

Structural Characteristics

The pump is first stage impeller of double suction and the radial part segmental structure.The flagstaff connects the suction section,middle section and disgorge section to be a whole part.Pump rotor is constituted by the first double suction impeller,secondary impeller and balancing drum,etc.

Axial force balance:Axial force produced by balance drum and two thrust bearing balance impellers.

Bearing:The drive end uses imported SKF or FAG cylindrical roller bearing radial force, the non-driving end uses two imported SKF or FAG radial-thrust bearing to bear radial force and to balance residual axial force.

Shaft seal:Packing seal or mechanical seal shall be applied according to user’s demand.

Transmission:Driving is proceeded through the flexible diaphragm coupling driven directly by the prime motor.Pump rotates clockwise from the direction of driving end.

Heat dissipation of bearing:Lubricating ring is used to cool lubrication down.The effect shall be better if cooperated with fans and heat radiation rib.

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Q:What are the important parameters of the pump?
The head is the unit weight of liquid pump pumping from the inlet of the pump (pump inlet flange) to the outlet of the pump (pump outlet flange) energy value. Effective energy is a Newtonian liquid through the pump unit is obtained. The N m/N=m, the height of liquid column pumping liquid used, referred to as meters.Speed nThe speed is the number of revolutions per unit time of the pump shaft. It is indicated by the symbol n. The unit is r/min.Cavitation allowance NPSHCavitation margin, also called net positive suction head, is the main parameter to indicate the cavitation performance. The cavitation margin has been expressed by delta H at homePower and efficiencyThe power of water pump usually refers to the input power, that is, the power transferred by the prime mover to the pump shaft, so it is also called shaft power. It is expressed by P;The effective power of the pump, also known as the output power, is expressed in Pe. It is the effective energy obtained by pumping the liquid out of the pump in unit time
Q:How many kinds of pumps are available and the operating principles of various pumps?
There are many kinds of pumps. There are different classifications according to different standards. If classified according to the principle of work, can be broadly divided into the following four categories:1, vane pumps: centrifugal pumps, axial pumps, mixed flow pumps, vortex pumps, etc.;2, displacement pumps: piston pumps, piston pumps, diaphragm pumps and so on;3, power rotary pump: screw pump, gear pump, etc.;4 、 special function: jet pump, water hammer pump, magnetic drive pump, etc.;
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:Water pump outlet valve sequence
In order to prevent the generation of water hammer when the pump stops the damage to the rubber head, should be immediately set rubber head pump outlet, the gate valve and the check valve is not a very convincing reason to decide the order of habits in our hospital order rubber head, check valve, gate valve1. Check valve located in front of the pump, I do not know what the significance is too great to think of.2. The actual installation sequence shall be: soft fittings, check valves, gate valves. The pressure gauge is best installed on the water outlet of the pump, but it must be in front of the check valve.Reason: 1) the soft joint is used to reduce vibration. The connection between the pump and the piping system, of course.2) normal work, the gate valve is not operating, and the check valve is frequent action, so the probability of maintenance is larger, when the maintenance of the pump closed, the water outlet valve can be maintained without affecting the normal operation of the system.3) the pressure gauge is installed in the check valve, which can prevent the impact and damage of water hammer on the pressure gauge.
Q:Concrete pump 125 pipe wall thickness
Currently mainly divided into gate valve, concrete pump and S valve concrete pump. Another is a pump consisting of a pump body mounted on an automobile chassis and fitted with retractable or bent cloth poles
Q:What are the general water pump failure, how to repair?
(2) in contact with the water pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, the intake pipe will retain air, reducing the water pipes and pumps in the vacuum, water absorption.
Q:Why does the centrifugal pump close the pressure to start?
The flow is zero (i.e. off dead) minimum, the highest lift power; with the outlet valve opening increases, flow increases, the lift, power and efficiency are increased, the maximum value (usually in the vicinity of the highest rated flow point)
Q:The difference between diaphragm pumps, vacuum pumps and centrifugal pumps
The diaphragm works by changing the size of the diaphragm. When the cup is covered with an eraser and the edge is airtight, then pressing the rubber or pulling the rubber outward will make the pressure in the cup increase or decrease. Use this principle, in the pressure of an hour from a hole suction medium, when the pressure is large, from another hole extrusion medium, so as to achieve the purpose of conveying.
Q:What are the uses and precautions of magnetic pumps?
5, after the motor starts, slowly open the drain valve, until the pump into the normal working state, and then discharge valve to the desired opening;6, before the pump stops working, should first close the exhaust valve, and then turn off the suction valve.
Q:Rules for operation of centrifugal pumps
Working principle and process flowWorking principle: when the drive motor with high-speed rotating impeller, full of fluid in the pump body under the action of centrifugal force, was thrown from the impeller center to the outer edge of the impeller, in this process, the fluid energy, improve the pressure can, at the same time also increases the energy flow rate increase. The liquid from entering the pump impeller shell, the liquid flow gradually widened, the liquid velocity decreased gradually, which will be part of the kinetic energy into pressure energy, which further improves the static pressure of liquid, and liquid with high pressure in pressure pipeline. When the liquid from the leaves out when the impeller center creates pressure and low pressure than the out plane is big, under pressure drive, liquid is continuously from the center of the impeller suction, with the pressure of continuous discharge.

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