Algodoo

SPH.radius = 0.025
Sim.Frequency = 500 - 1000


This is a water pump that will pump high volume under no load, and high pressure under load.
The outer rotating ring serves as a valve for both the inlet and outlet of the central ring. The center ring, with it's offset rotation, creates pressure in combination with the spring assembly by reducing the amount of space for the fluid to occupy, forcing it out.
The outer ring/valve assembly is timed appropriately so as to avoid creating pressure in the central ring, where energy would be wasted, instead, at the beginning of the stroke, the output is opened and the fluid is pushed outward and very little *excess* internal pressure is created.

Besides this, the spring assembly serves as a valve, which lets of the small amount of pressure left over due to the timing of the valve system. This pressure is let out to the top of the central assembly where the fluid is recirculate.


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The outer ring, with it's large cavity, serves as the high volume low pressure pump by moving large amounts of fluid when there is no opposition. When there is back pressure, the fluid in the cavity is essentially a static revolving mass, as at no time can it connect to both the outlet and inlet at the same time. ( In which case it would allow the pressure to escape.

When the inlet fluid is low, or the flow is inadequate, the outer ring serves to fill the pump cavity faster by taking in fluid after the inlet to the pump has closed. On the next cycle, the taken in by the outer ring is partially pushed into the pump inlet. This raises efficiency when the device is starved for fluid. In adition, the outer cavity, being able to allow circulation of fluid from the high pressure side without leaking to the low pressure side, serves to lubricate the pump at all times by always having some flow.

The very small slot in the outer roter is to aid the device when a maximum pressure level is exceeded. When the maximum pressure is exceeded, the spring mechanism will be unable to keep in contact with the central ring. Fluid pressure forces the spring mechanism back, and the small slot in the outer ring serves as a pressure releif feeding back into the reservoir. The releif slot is closely timed so as to prevent leaking pressure from the high pressure side during the stage where the inlet is open.

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Run this simulation between sim.frequency 500 and 1000 for optimal results.