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AguaClara / ram_pump

Optimizing the hydraulic ram pump for more efficient use in providing plant plumbing.
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Static Force of Water and Rod on Plate #78

Closed alyssaju closed 5 years ago

alyssaju commented 5 years ago

The static force on the plate we calculated was 14.95N. This was greater than our measured forces required to open (12.5N and 13.24N). Should we use this static force to find the optimal spring?

Code for calculating the static force on the plate d_plate = (1.125u.inch).to(u.m) #diameter of check valve plate L = 2.20u.m #length of drive pipe m = 0.1132u.kg #mass of rod+plate+stopper G = 9.807u.m/u.s**2

Calculating force of water on the plate:

V = (np.pi * (d_plate/2)*2 L).to(u.L) F_water = (V 1000(u.kg/u.m*3) G).to(u.N)

Force from weight of rod:

F_rod = (m * G).to(u.N)

Total Static Force on Plate:

F_plate = F_water + F_rod print(F_plate)

monroews commented 5 years ago

The force you calculated and the forces you measured are reasonably consistent. So increase the force to be slightly greater than 15 N to ensure that valve opens when the water stops moving.