DG-Type Multistage Pump

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Description

DG type pump is horizontal multistage centrifugal pump,which is used to transport clean water with temperature less than 160℃,and also insoluble solid impurity 0.25%,and liquid such as water-soluble solid impurity 5% and other medium similar to water.

Application Area

It is mainly used in light textile industry comprehensive utilization and also sub-high pressure boiler water supply in small-scale thermal power plant.

Performance Range

Inlet diameter: 50-150 mm

Capacity:6-155m3/h

Head:50-960m

Speed:2980r/min

Matched power: 4-450kW

Structural Characteristics

The pump is single casing,single suction,multistage sectional centrifugal pump structure.The inlet%outlet of pump is vertical.(Please refer to structure chart).Detailed structure is as follows:

1、Stator part

It is mainly contained by some parts such as forepart,back part,middle part,guide vane bearing support&balance room,etc,which are all combined by tie bolt and nut.

2、Rotor part

Round nut has been tensed by impeller,impeller space sleeve,balance spacer sleeve,balance disk&shaft sleeve.Moreover,it has been fixed on the main shaft,which adopts flat key so as to avoid rotate.In doing so,the whole rotor supports on the both sides of bearing,consequently,rotor connected with motor directly by elastic pin coupling.

Gear gasket has been installed between impeller and balancing guard sleeve in order to compensate expansion,such part should be replaced during maintenance.

3、Balance organization

This pump adopts balance disk hydraulic balancing device,it is made up of balance ring,balance disk,balance sleeve and balance guard sleeve.

Balance leakage water will return to front-section suction vortex chamber.

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Q:Variable flow pumps are variable pumps
Yes. The variable pump is designed to change the flow rate
Q:Why can't the centrifugal pump pump the vacuum?
Characteristic equation of centrifugal pumpStudy the effect of fluid on centrifugal pump to obtain energy.The experimental condition of u is that the ideal fluid of unit weight bends the flow between blades at infinity.U investigated the mechanical energy balance of the fluid between the adjacent two inlet and outlet sections, that is, the relationship between theoretical pressure head and theoretical flow.
Q:Hydraulic pump displacement refers to the pump shaft what?
You can see the sign of your hydraulic pump. There will be a displacement **ml/r in the sign of the hydraulic pump (r stands for every turn, ML is milliliter)
Q:Must the water pump in the tank be all soaked in water?
Of course, if the motor is overheated, it will burn, and the temperature of the water will drop down.
Q:What is the difference between centrifugal pump and rotary vane pump?
Directly said vane pump on the line, generally do not say rotary vane pump.The centrifugal pump is divided according to the direction of the liquid flow in the impeller
Q:5 floor water pressure is too low, what kind of water pump is better?
The location of the pump is too far away from the pumping pool, the suction of the pump is not enough, cavitation phenomenon, pumping water, this water pump manufacturers, the pump will be placed in a reasonable position
Q:What are the general water pump failure, how to repair?
Two, pump speed is low(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.(2) the mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or deformation of the pump shaft bending, resulting in multi impeller, directly with the pump body friction, or bearing damage, are likely to reduce the pump speed.(3) the maintenance of the power machine is not working. The motor is lost because of winding burn, the change of winding number, wire diameter, wiring method, or failure in maintenance can not change the pump speed.
Q:What are the characteristics of a vertical multistage centrifugal pump?
Vertical multi-stage centrifugal pump is cast iron, the advantage is that the price is cheap, the disadvantage is bulky and power consumption.
Q:Working principle and structure of external gear pump
When the meshing teeth on one side of the suction chamber are gradually separated, the volume of the suction chamber is increased, and the pressure is lowered, and the liquid in the suction pipe is sucked into the pump; the suction liquid is divided into two parts to be pushed into the discharge chamber by the gear in the alveolus. When the liquid enters the exhaust chamber, the liquid is squeezed and discharged from the exhaust chamber into the discharge pipe because the teeth of the two gears are continuously engaged. The driving gear and the driven gear keep rotating, and the pump can continuously inhale and discharge the liquid. The pump body is equipped with a safety valve, when the discharge pressure exceeds the required pressure, the delivery liquid can automatically open the safety valve, so that the high-pressure liquid returns to the suction pipe.
Q:How is the pump level of submersible sewage pump determined?
Generally as:The bottom elevation of sump sump plus 300 is the water level of pump stopThe top 300 of the sump top elevation is the pump water level

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