How does a Combine work? Example JohnDeere S680 and 9650STS

Added: April 21, 2013 (about 1 year ago) share on facebookshare on twitter

Duration (11:18) Views: 146,908 by oBseSsIoNPC Category: Tech

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Video Description

THIS VIDEO HAS BEEN RECORDED IN HD.

Hi folks. This is Dan with another technical video that I hope will help you understand how a combine works (any combine, basically). Apart from the video, I would like to put down the product flow here.

Product (whole cut wheat/barley/canola etc.) will enter the feeder house (Assembly in front and under the cab) in which the conveyor chain will grab the product and feed it up toward the feed accelerator. The feed accelerator is basically a fast spinning drum that will "accelerate" and force the stalks and heads into the feed ramp from which the rotor will pull the product. The rotor (or cylinder on other style combines) will then thresh the product against the concave's in a screw type motion and separate the kernels or seed from the head or shells. Then the product can either be "clean grain" and go into the tank, end up on the chaffer for a "pre-selection" or put onto the sieve and separated there or put into return. Chaffer and sieve are nothing else but a barrier to different stages of the product in the combine. They separate the grain in such a way, that it can either be returned for re-threshing, end up in the clean grain auger or be tough and useless enough to end up going out of the back through the straw chopper or just on the ground for baling. To minimize the return volume, the back end of the rotor can separate the product in a rather crude way, with the help of tines and grates. There is also a so called discharge beater that will not only aid in removing the product from combine, but also separate heads and kernels by "beating" it before discharging. Product can then again end up on the chaffer, fall through the chaffer, on to the sieve or through the sieve to take the route into clean grain or return. The return part of the combine can either be supported by a re-thresher, which is a small version of the rotor and concave's. That hopefully separated clean grain will be auger'd back into the combine, just above the chaffer to fall through and end up into the clean grain bed. If the combine does not have a re-thresher, the return auger will put the product back on top of the rotor to be re-threshed there. The rest is simple, as clean grain will end up in the tank and useless material ends up at the back end for the gofers.

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