Disassembly steps of single screw pump

Disassembly steps of single screw pump

1. Before disassembling the single screw pump, the motor needs to be removed to prevent accidents.

2. Disassemble the pump head. Remove the fixing nut of the pump head and take off the pump head.

3. Pull out the stator.

4. Disassemble the rotor, connecting rod, short joint, and sealing box by first removing the tee. Remove the steel wire clamp or fastening screw. After exiting the cylindrical pin anti slip sleeve, remove the circular pin. After separating the rotor, connecting rod, and short section, the sealing box can be removed. Caution must be exercised when using mechanical seals, otherwise it is highly likely to cause the breakage of the dynamic and static rings.

5. Before reinstalling the pump, preparations for replacement and maintenance should be made. Strictly inspect the quality of the parts to be installed, whether they are cleaned thoroughly, and check whether the appearance is damaged.

6. The assembly steps are exactly the opposite of the disassembly steps.

7. When assembling the packing seal, be careful not to adjust the seal too tightly. After the trial feeding, gradually tighten it until there is slight leakage of the medium. If it is a mechanical seal, attention should be paid to the absence of impurities on the dynamic and static rings, and lubricating grease should be applied. The static ring must be installed smoothly into the sealed box.

8. The rubber sleeve at the connecting rod joint should be checked for damage. Is the cavity filled with lubricating grease.

9. When installing the stator, applying lubricating grease to the rubber surface (including the rotor) is beneficial for installation and trial operation.

10. When installing the pump head, the nut should be tightened symmetrically and evenly to ensure its sealing with the stator end face.