1. Rope pump Fabrication By Ashif Momin, Ritesh Patel, Kishan Majethia & Raviraj Parmar

2. Basic introduction To rope pump There are many pumps available in the market of high efficiency and higher reliability but the basic disadvantage of such pumps is their higher initial cost as well as higher maintenance. Even the problem is not just been solved by the initial high cost. There has been considerable money drain over the maintenance of the pumps. In our developing country like India many rural areas are yet using the basic bucket and a pulley to drive the water from the well because of their inability to pay such high price for such sophisticated pumps. There’s a solution way out to this problem “A Rope Pump”. It is having a much low initial cost along with low maintenance without much affecting the efficiency of the pump.

3. Dimensional Design of rope pump

4. Results of last design ContentsValue Power8.77 W Rotation30 rpm Head2 m Flow rate27.5 lit/min Diameter of pipe3.81 cm Diameter of pulley250 mm Diameter of shaft10 mm Spacing between two pistons20 cm Weight of single water column between 2 pistons2.23 N Piston diameter37.1 mm Piston thickness Efficiency Rope diameter Rope length

5. Components

6. Component specifications Piston = 5 mm hard rubber and 5 mm soft rubber. Dia = 40 mm Rope(Nylon) = Dia 7 mm, Length = 6.5m(after piston assembly. Pulley(Wired) = Dia 300 mm, joined to shaft by welding(Arc) Shaft(M.S.) Bearing number 6201 z Pipe & Tee (PVC) (joined by nails)

7. Assembly – Rope and pistons

9. Assembly – Wheel rim

10. Assembly – wheel rim with rope and pistons

11. Assembly - Structure

12. Assembly – Rope(with pistons) and pipe

13. Final Assembly

14. Force Analysis Force required to lift water = Weight of water column overall, F = (3.14/4) D 2 H g F = (3.14/4) (0.0381) 2 * 2 * 9810 F= 22.368 N Torque = Force * Radius of pulley T = 22.368 * (0.3/2) = 3.355 Nm

15. Result table N (RPM)Q, Flow Rate Actual(lit/mi n) Q, Flow Rate Theoretical (lit/min) Flow Efficiency 322228.677% 402835.7578% 503544.6978% *This loss is due to leakage from upper side and due to friction between pistons and pipe

16. Conclusion Flow rate Q ∞ DN ∞ Velocity. We can see from this equation, that flow rate increases with diameter of pulley and pipe and rotation of pulley. But here diameter of pulley and pipe is fixed for each model. So we can vary the flow by varying the rotation of the pulley. As the head and diameter of pipe increases force required and power input also increases. Friction is responsible for higher power losses, so we can minimize by selecting proper material and size of piston and pulley, but as we increase the clearance between piston and pipe leakage increases, so we should design the pump by considering this two factors.