Dregs Liquid Pump

     Type SAJ series Slurry Pump is a new energy-saving centrifugal pump. The products are designed and developed by The Pump Technology Corporation, Hydro mining Research Institute Tangshan Branch. They are innovative in hydraulic designs, structural designs and materials of castings after integrating congeneric products throughout the world. They have many features: high efficiency, reasonable design, and reliable operation, long in service time, easy maintenance, and low running costs and so on. The SAJ series pump’s lead their domestic counterparts in various technical performances, with most of them approaching the advanced world level, and widely used for handling abrasive or corrosive slurries in power, metallurgical, mining, coal, as well as chemical industries. For example, flushing ash in power plants and pumping coal slurry in coal preparation plants. They are suitable for handling abrasive and corrosive solids-bearing slurry with maximum concentrations of wt.45 %(ash) and wt.60%(ore).

The SAJ series slurry pumps are single-stage, single-suction, axial-suction and centrifugal slurry pumps. They classified into the horizontal version (SAJ type) and the vertical version (SAJL type).

1. Structural feature and type of SAJ slurry pumps

(1) Structural feature of SAJ slurry pumps

Pump head:

It is a horizontal cantilevered slurry double-cases pump. The pump head includes cases, impeller, and shaft seal. Double-cases pump centrally split vertical spilt direction. Discharge port can be positioned at 8 different position at an interval of 45°. The outside cases made by HT200 or HT500-7, connecting with bolts. The inside cases (volute case, front liner, back liner) made by high-chrome alloy or rubber materials.

Impeller front and back cover plates with back vanes to reduce leakage and increase operating life, impeller and shaft is firmly connected by ladder-shaped with disassembly ring, ”O” rubber ring is used between liner and volute casing and it is very convenient and reliable.

Shaft Seal: Expeller seal and packing seal.

Support

The supports can be lubricated by oil. Supports are made up with support body, support cover, shaft, bearing box, bearing, bearing cover; baffle sleeve, nut, and oil seal wash plate and so on (See Figure, 1). The supports have water-cooling above 150SAJ. 

Figure 1 Structural Drawing of SAJ Slurry Pumps

  1. Coupling  2. Shaft    3. Bearing housing 4. Disassembly ring     5. Expeller   6. Rear liner plate 

7. Volute casing    8. Impeller    9. Front liner plate 10. Front casing   11.Rear casing     12. Stuffing box  13. Water-seal ring     14. Base  15. Support  16. Adjusting bolts    17. Inlet stub   18. Outlet stub

2. Structural feature and type of SAJL series slurry pumps

(1) Structural feature of SAJL series slurry pumps

SAJL series slurry pumps are made up of Impeller、Volute casing、Rear line plate、Shaft sleeve、Support、Supporting plate、Shaft、Bearing、Bearing body and so on. The materials of Impeller、Volute casing and Rear line plate is cast iron which contains high-chrome alloy. The impeller can be installed with shaft through screw thread. Volute casing、support and bearing body are connected with bolts. The driving patterns of the shaft and the motor could choose the coupling direct driven or the belt driven. The bearings of SAJL slurry pumps are lubricated by grease. Structure of the SAJL series slurry pumps (See Figure2)

1. Volute casing   2 . Impeller   3. Rear line plate  4. Seal ring    5. Oil seal  6. Bearing  7. Oil cup                     

 LIST OF VULNERABLE PARTS