Quote:
Originally Posted by DJCarbine
The traction drive gearbox is what makes it possible, the rotrex units have a non-newtonian fluid (as far as I know) which allows greater "traction" of the fluid and enhances low RPM/High load operation so the speed of the impeller is quicker than it SHOULD be than if the fluid was not under so much load.
This means instead of a impeller RPM plot that has a constant state of rise, you actually get a speed plot that is a bit "fatter" in the lower speed range and performs better than traditional helical/straight gear direct drive. This is also why the rotrex has oil reservoirs, I believe the nature of the friction drive generates heat.
This is how I understand it, I could be completely wrong... its very interesting operation  |
"the Rotrex traction drive uses a special traction fluid. These fluids are a new family of synthetic hydrocarbon oils and greases offering a series of unique performance advantages. Developed specially for its use in Rotrex superchargers, the traction fluid momentarily increases viscosity under high surface pressure, enhancing the traction drive performance by securing the optimum friction between rolling elements while cooling and protecting the system."
Sounds non-newtonian to me.