Knowledge of MD series wear-resistant multi-stage centrifugal pump for mining

1.1. MD series wear-resistant multi-stage centrifugal pump for coal mines

The MD series wear-resistant multi-stage centrifugal pump for coal mines has been successfully developed by our company based on the introduction, digestion, and absorption of advanced technology. This product not only has high efficiency and good cavitation performance, but also runs smoothly and reliably. The overcurrent components are made of wear-resistant materials and the friction pair and overcurrent clearance are specially processed at the matching parts. They are suitable for conveying neutral mine water and other similar media with solid particle content not exceeding 1.5% (particles less than 0.5mm) and temperature not exceeding 40 ° C in coal, mining, factories, and other occasions.

1.2 Technical parameters:

Flow range:

Head range:

Power range:

1.3 Structural Features and Working Principles

1. Column pin elastic coupling components, 2. Suction side shaft sleeve, 3. Suction section, 4. Sealing ring, 5. Impeller, 6. Guide vane, 7. Middle section, 8. Guide vane sleeve, 9. Balance sleeve, 10. Discharge section, 11. Balance ring, 12. Balance disc, 13. Bearing, 14. Rolling bearing components, 15. Pump shaft, 16. Packing box, 17. Discharge side shaft sleeve

1.3.1 Overall structure:

The MD type pump is a horizontal single suction multi-stage segmented centrifugal pump. Its suction port is located on the inlet section, in a horizontal direction, and the discharge port is vertically upward on the outlet section. The suction section, middle section, and discharge section of the pump are connected together with tightening bolts. The head can be adjusted by adding or removing the number of stages of the water pump according to usage needs.

1.3.2 Main components:

(1) The main components of a water pump include the inlet section, outlet section, guide vanes, inlet section guide vanes, middle section, impeller, impeller sleeve shaft, shaft sleeve, sealing ring, balance ring, balance disc, tail cover, etc. The rotor is composed of impellers, balance disks, and other components mounted on the shaft. Both ends of the rotor are supported by rolling bearings, which are lubricated with grease.

(2) The working chamber of the pump is formed by the inlet section, middle section, guide vanes, outlet section guide vanes, outlet section, and tail cover. The liquid enters on one side along the axial direction, and the axial force generated during pump operation is balanced by the balance plate.

① Shaft seal: using soft packing seal, can also be customized according to user requirements

② Transmission: The pump is directly driven by the motor through an elastic coupling, and when viewed from the direction of the motor, the pump rotates clockwise.

③ Sealing ring: prevents high-pressure water from leaking back into the inlet of the water pump, and can be replaced after wear and tear.

④ Balance disk: located between the outlet section and the tail cover, used to balance axial forces.

⑤ Balance ring and balance sleeve: fixed on the outlet section, together with the balance plate, form a balance device.

⑥ Shaft sleeve: It can be replaced after wear at the two packing chambers.

1.3.3 Rotation direction:

From the direction of the motor, the pump is advertised in a clockwise direction.