P09454: Design and Testing of Centrifugal Pump Components/public/
Benchmark Current System (P08453)
Engineering Analysis of Previous Project Platform
All of the items that follow are analyses based on current project objectives. Italicized bullets are of secondary importance to project goals.
- Poor tool clearance in the proximity of impeller mounting block.
- Reassembly of mounting plates without sufficient force results in leakage.
- Non-standardized force and torque required for impeller/volute switching.
- Seals are not fully uniform and have sealant build-up.
- Motor and impeller drive shafts are not lined up appropriately, currently a flexible connector compensates for this.
- Time required to take the mounting block apart and remove impeller and reverse the process is ~10 minutes, only leaving one full hour in the lab period to actually perform flow measurements and visualizations.
- Tight fitting dowel rods for mounting of the impeller prevent quicker swapping and will not facilitate any impeller change outs if the blades are of a more delicate design.
- Water tank capacity is much larger than used within the pump system.
- Water tank height relative to pump system is opposite of what is desired.
- System drainage is not sufficient; water remains in the impeller compartment during the switching process.
List of Suggested Improvements
- Create new impeller and diffuser designs: Basic, curved impeller, curved with splitters, single volute casing, and double volute casing.
- Raise motor and pump two to three inches and align the drive shafts properly, allow for faster swapping of impellers/volutes, and easier system drainage.
- New sealing mechanism/materials.
- Electric drill with hex bit for removal of cover plate/diffuser so that replacement can be set to a certain torque and keep it constant at a known level so that leaks do not occur.
- Verify torque required to prevent leaks with screw - plate - gasket calculations.
- New metal block machining may be required to have sealing area large en`ough to accommodate a double volute design.
- Impeller design with two or three alignment holes for dowel rods (Not tight-fitting) while a central screw keeps it flush with drive shaft plate.
- Smaller water tank with higher elevation
- Drain with another pump or rearrange pump loop so that primer pump can drain it