Hi everyone!
I mostly model and rig mechanical models. From time to time I run into interesting bits of engineering.
Like the gerotor pump/motor. Mathematically it could be considered in the same boat as a wankel engine. Referring to roughly the same mathematical principles.
I’ve not been able to found an easy way to make one other than a script or a little trial and error. A gerotor with gears of 9 outer teeth and 8 inner teeth proved to be the easiest to make, not using any math at all.
Luckily, rigging them is much easier. Which I demonstrate in this video:
For those wondering, this type of pump/motor is typically found in oil pumps. It easily converts torque into high pressure or high pressure into torque. Having no problem dealing with liquids with higher viscosity. These properties also make it a good candidate for an engine where high pressure fluid is readily available and the work load necessitates high torque.
The Hydraulic Control Unit (HCU) depicted demonstrates a mechanism that could be used to drive machinery in a system which has flow only in one direction.
Figured I’d leave this here in case someone finds this useful someday 