How to Assembly and Disassembly the Vertical Turbine Pump?
Vertical turbine pumps play a critical role in deep well applications, especially where water needs to be lifted from dozens of meters underground. Unlike horizontal or inline pumps that can be hoisted and serviced as a single unit, vertical turbine pumps are assembled and disassembled section by section due to their deep well installation.
Assembly Process of Vertical Turbine Pump
Proper assembly ensures optimal efficiency and lifespan of a vertical turbine pump. The process is typically carried out from the bottom upward, in the following steps:
1. Install the Pump Shaft
– Insert the pump shaft into the water intake pipe.
– Attach a gasket and a mounting nut at the bottom of the water inlet section.
– Ensure the shaft protrudes 130–150 mm from the lower flange (smaller pumps need larger protrusion).
2. Fit the Conical Sleeve and Impeller
– Slide the conical sleeve onto the shaft and push it towards the bottom until it rests against the gasket.
– Mount the impeller and secure it with a lock nut.
3. Install Intermediate Stages
– Repeat impeller and casing installation for each stage.
– Remove nuts and washers to measure rotor axial displacement: ideal range is 6–10 mm.
– If the displacement is under 4 mm, reassembly is required to correct alignment.
4. Final Axial Adjustment
– Turn the adjusting nut until it lightly contacts the drive disc.
– Rotate an additional 1 to 1.67 turns (1 to 5/3) to lift the rotor slightly.
– This ensures proper axial clearance between impellers and bowl assembly.
Disassembly Procedure for Vertical Turbine Pump
Disassembly follows the reverse order of assembly and requires care to avoid component damage.
1. Initial Lift
– Unbolt the pump base from its foundation.
– Use a tripod and manual hoist to lift the entire pump vertically by the top section.
2. Use of Clamping Plates
– Attach clamping plates around the discharge column to shift the load away from the base.
– Once stable, remove the pump base.
3. Section-by-Section Dismantling
– Lift the pump further and clamp the next section.
– Remove the exposed section, and repeat this process until the full pump is disassembled.
4. Impeller Removal
– Use a custom removal sleeve against the small end of the conical sleeve.
– Tap the sleeve to release the impeller, separating it from the conical fitting.
Conclusion
Correct assembly and disassembly of a vertical turbine pump are vital to ensuring its performance and reliability, especially in deep well applications. Following a precise and safe procedure reduces mechanical failures, ensures proper alignment, and prolongs operational lifespan.
