Pneumatic Assisted Separation
First off, We at Sunnybrook want to say THANK YOU to the owners, operators and Dealership guys that visit this site. Your opinions and support has been a huge part of our success. It's a two way street and we'd like to openly share our R&D, for feedback and opinion.
This summer we will be field testing a couple of prototypes. Although the concept is in no way limited to the Gleaner platform, its' set up/design is most conducive for proving concept. At present, we are generating air flow and pressure curves to correlate to field performance. (patents pending)
Design Summary (measurements approximated):
-raise 3 channels running full length of rotor by 1/2" to increase open area/air flow
-inset discharge endspool of rotor 12"
-cut 3 rectangular openings into rotor skin past endspool corresponding to underside of the 3 channels to be attached
- mount centrifugal fan blades (12" wide) from 5" rotor core to 20" rotor skin to compress and deliver air into the 3 channels.
- modify "stop" sign (combine side panel) to have a 3/4" high ring that overlaps and insets the 24" rotor skin by 1/8". Between the bearing mount and the inner ring, open approx 50%*of the surface so air can be supplied to the cavity inside.
- modify the rotor stub shaft by adding 2 step-downs. 1st is a small step to accommodate the rpm dial, second step down will be to mount a high volume 22" axial fan, delivering air through the stop sign into the centrifugal fan cavity for compression.
-cut a 22" hole in the combine body panel corresponding to the axial fan and mount a safety screen
* air volume and velocity will be regulated by two means. 1) open area of stop sign will be easily adjustable, varying air supplied to centrifugal cavity. Air delivery to crop processor will be controlled by sliding louvers that attach to channels with/without sweeps in place. Prototypes have 7 jets per channel, 3/4" by 4" running axially, corresponding to the positive pressure side of sweeps. Our hopes are that the static/dynamic airflo curves will allow us to pre-set sliding louvers in consideration of head loss along channel length.
any air leakage via stop sign lip into processor will simply increase air flow to discharge paddles. We believe sweeps (with their high pressure and vacuum effect) will be an important consideration in adding air to the separation equation.
I'd like to thank Dan Hurtt and Blaine Allred in advance for stepping into the batter's box for us this summer/fall with their Customers. We frankly couldn't do squat without these guys. Ideas and opinions are great but rubber to the road is crucial.
We'd post pics of progress but come by our booth in Regina in June.
Cat's outta the bag now TBran LOL ! All considered, this is a very simple modification to an existing machine that may yield a significant return for the buck, hopefully saving HP/fuel. The other colors will pose a bit more challenge. At least we'll know if it's worth the effort in 3 months time.