Ordinary force pump, with two valves
Ordinary force pump, with two valves. The cylinder is above water, and is fitted with solid piston; one valve closes outlet-pipe, and other closes suction-pipe. When piston is rising suction-valve is open, and water rushes into cylinder, outlet-valve being closed. On descent of piston suction-valve closes, and water is forced up through outlet-valve to any distance or elevation.
Only the input is driven; every other part of this model moves by physics (MuJoCo), and its ratios are measured. Run it live, change its parameters, or switch the friction off to see the output stop.
- Modelled as
- Seen from the front, as Brown, the pump cut away in half section: an open barrel (6 cm bore) above the water with a solid piston (leather-packed); a flap hinged at one edge closes the suction hole in its foot, and a passage from the foot leads to the outlet valve (a poppet) under the rising pipe. The handle turns on the top of a swinging link from a lug on the barrel and is pinned to the piston-rod a short way along, so the rod rises and falls straight; the hand swings the handle - the only drive. The water is lumped vessels: the barrel under the piston with the passage is a chamber the piston sweeps, the suction pipe is the well's water about 20 cm below, and the rising pipe is an open tank whose water rises with each down-stroke and runs over where the pipe is broken off. Both valves are real - the flap on a hinge, the poppet on a slide - shut by their weight and moved only by the pressures on their faces.
- Measured
- On each up-stroke the suction flap opens and water rushes into the barrel while the outlet valve stays shut; on each down-stroke the flap shuts and the water is forced up through the outlet valve into the rising pipe. The pipe, 2 cm full at the start, fills in two strokes and then runs over at its top: 0.55 kg is drawn up in 10 s and 0.39 kg runs over.
- Notes
- The water in the barrel is a lumped chamber and is not drawn (as in Brown); the water in the rising pipe is. The pipe is broken off about 21 cm over the valve, where it runs over.
Film (MP4) · Still (PNG) · Spec (YAML) · Model (MJCF)
