How agriculture works thread

[ArlyA]

For anyone who'd care to see how combines can separate grain from the stocks and chaff, here is a really nice video of that. This is how combines have been made since around the turn of the century.
This shows a standard position cylinder which it the large paddle like part that knocks grains off the stock but today most manufacturers are "axial flow" and they rotated the cylinder and added a second one. My description overly simplified but you get the idea in this video.

 

[Creamer]

Here is a transverse rotor Gleaner video that shows the accelerator rolls and how they assist in the separation. It also mentions the sidehill capability versus an axial flow rotor. Not that I am a Gleaner fan but they have their advantages - one being that they are about 10,000#s lighter than most others with their capacity which in today's world of soil compaction issues is huge. Also no straw walkers.

 

[Creamer]

Here is a diagram of a CIH 9250 - no walkers or pans - just the rotor and the transverse rotor for final knockout and chopping with sieves down below.

 

[5030]

No Gleaners around here, some CNH however. Couple years ago I helped remove the rotor on one. Difficult job as it's angled.

 

[Creamer]

No Gleaners around here, some CNH however. Couple years ago I helped remove the rotor on one. Difficult job as it's angled.

Angled and heavy. How did you do it? I have heard of opening up the concaves and placing some wood around the lower part and closing the concave to support the rotor while you take it loose and then using a loader, forklift, liftall or whatever drag it out of the machine. A crane would be a lot handier but most people do not have them handy for that size and that high.

 

[Creamer]

I find it interesting that the new Deere X9 uses two rotors but it looks to me like a good share of the threshing is done in the feederhouse more conventional style and then the rotors are more for the separation of the grain from the straw. Definitely a lot of moving parts on the new Deere with all those grain catch pans and related augurs up underneath the feederhouse.

I love the concept of the accelerator rolls but I need someone who knows and will tell me that they got their problems worked out.

 

[ovrszd]

So, after all that, are Rotary Combines more capable on hill ground or not?

 

[ArlyA]

So, after all that, are Rotary Combines more capable on hill ground or not?

Yes they are. Lets say normal cylinder combine in 1960 could do a level field with 1%* chaff and minimal grain loss. Put it on a hillside and gain loss goes up to 6%* plus the chaff continuation up to 5% and the price for your grain will of course be downgraded at the elevator. These new axialflow machines will do much better on that same hillside.

*not real numbers

 

[ArlyA]

Here is a diagram of a CIH 9250 - no walkers or pans - just the rotor and the transverse rotor for final knockout and chopping with sieves down below.
View attachment 755073

There is a shaker pan to move the rain back at the bottom.

 

[Jstpssng]

Ever see someone in a low slung sports car drive under one?
Its pretty common here to see it.

I've seen them come in over the apple orchard I was working in, and as he was going up, lift the tail of the plane to clear the roof of the cold storage building.