Pump is still in the prototype stage so any input would be welcomed.
24V Power supply
ABS Plastic Impeller Housing
Motor - RS Components.
Power Supply - Weir Instrumentation Ltd
Meccano No:94 sprocket chain
Ball Bearings - RS components
Step 1: Creating the Frame
Files were created in Solidworks and exported as a DXF file - the format appropriate for laser cutting.
5 Sections were cut and using dichloromethane attached together.
spec and pictures to follow.
Step 2: Creating the Gears
4 different sizes of gears were cut to broad give scope for testing, one with 56 teeth, one with 42 teeth, one with 28 and one with 14 teeth.
Step 3: Creating the Impeller
A test run is stimulated and then the Mini Mill cut the impeller from aluminium.
First picture depicts Solidworks model of impeller, second picture is the milled aluminium impeller.
Step 4: Creating the Impeller Housing
The housing is shaped to hold the blades with very small clearing between housing
One was rapid prototyped while two were laser cut from acetate.
Picture below shows Solidworks model and laser cut acetate model.
With the acetate model a bush (displayed in picture) is required to connect to the tubing while the rapid prototype does not.
Step 5: Creating the Axles
Spec outlined in image.
The small hole in the left hand end of the axle is space to fit a grub screw to connect the motor.
Design modified to incorporate a 10mm thread to connect to the impeller.
Step 6: Assembly
2. Assemble fram, glue using dichloromethane and slide the axles into place firmly so that there is no possibility of slip.
3. Connect the motor to the upper axle with the grub screw. This connection should also be tight enough to eliminate the chance of slip.
4. Slide gears onto axle end making sure to align the groove, smallest gear on upper axle and larger gear on lower axle and attach the meccano chain ensuring it is taught.
5. Thread impeller pump to lower axle and connect tubing to outlet on pump.
6. Connect the motor to the power supply.