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Principle of operation
Crop flow: Unclean grain flows into the conically
shaped inner screen. The inner screen hole diame-
ter allows the grain to pass through, keeping the
large impurities back.
1. Intake
2. Inner screen
3. Outer screen
4. Auger
5. Screenings outlet
Having passed through the inner screen the grain
falls onto the outer cylindrically shaped screen. Its
slot dimensions are designed to keep the grain
back and allow light impurities to fall through. The
drum containing the inner and outer screens rotates
at approx. 22 rpm.
The combi-cleaner is installet at an angle of inclina-
tion of approx. 5° to the rear, causing the crop to
move across the screens as a result of the rotary
movement of the drum.
After the mechanical cleaning, the crop is carried to
an aspiration cleaner where light impurities and
dust are extracted.
The impurities from both screens are collected in a
trough at the bottom of the unit.
At the bottom of the trough is an auger carrying the
trash to the front of the unit where the screenings
may either be disharged through a separate gravity
outlet or delivered into the trash blow line by the
combi-cleaner's fan and disharged together with the
light impurities.
The combi-cleaner is available in two versions, i.e.
electrically powered and tractor-powered (540 rpm
on the p.t.o. shaft).
Crop
6. Fan
7. Venturi
8. Scoop elevating section
9. Aspiration chamber
10. Outlet, cleaned grain
Light impurities
Small impurities
Large impurities
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