The Combi System
The Combi system:- A revolution in chaff and straw handling
A totally new concept
for handling of chaff and straw on combines has been developed by Rekord Sweden.
This patented concept is called the Combi System. The system makes it possible
to distribute the straw and chaff separately or handle them together. It is made
possible as the chaff spreader can be
Higher
demand on husk treatment:-
The developments
during recent years within agriculture have put higher demands on the straw
chopper and chaff spreader for combines. The main reasons for the increased
interest in the function of husks treatment are that :-
•
Larger combines have a higher flow of straw and chaff.
•
Wider combines have a demand for better spreading widths.
•
More intensive straw processing in the combine results in more chaff and
straw residues from the sieves.
•
Reduced cultivation has a higher demand for an even distribution of husks.
Breeding and spraying have resulted in tougher straw and then more leaf residues
on
•
Spraying of couch-grass is not possible in the chaff row behind the
combine Weed seeds and waste grain are concentrated behind the combine.
Benefits with the Combi system:-
The
patented chaff spreader:-
The adjustment of
the chaff spreader is simple by changing the location of the discharge.
Depending on model a shutter can be rotated or lids opened to regulate whether
the chaff will be spread separately or mixed with the straw. The plates then
distribute the chaff either sideways out on the ground or backwards up into the
straw, before it reaches the chopper.
Optimal
function with total flexibility:-
There are four
combinations of settings for the chaff spreader and chopper.
Settings to be choose may depend on how the residues will be used and the
following crop. Furthermore, the farmer has the freedom to choose what he
thinks to be the best configuration. The different settings have different
advantages.
1.
Straw is collected in a windrow. No chaff in the windrow results in a
less dusty straw, which improves its characteristics as a bedding material. The
chopper is shut off, which also reduces the wear and energy consumption on the
combine.
2.
The chaff is spread separate to the straw which is chopped and
spread. With this alternative, the setting of chaff and straw handling equipment
can be made separately. Moreover, the chaff will not put any extra load on the
chopper.
3.
The chaff is directed into the straw and windrow together with it.
The amount of material collectable for use as fuel for heat production or
bedding increases when the material from the sieves included. Furthermore,
possible problems from chaff, weed seed and spilled grain, when left on the
ground, are partly avoided.
4.
The chaff is thrown into the straw and chopped and spread together
with it. The chopper blows the straw and chaff into the stubble, reducing
the dust around the combine. Reduction of the dust improves working
environment and also diminishes problems with, e.g. the air cleaner on the
combine.
 |
A
new chopper has also been developed with a higher capacity, better
spreading performance and finer chopping, without an increase in energy
demand. This is achieved by a unique construction with 8 rows of knives,
and the more knives that together with the design of the chopper shell
give an almost constant load and an excellent air flow. The high
capacity and even chop make the chopper and combine run with a high
efficiency without problems. The new straw chopper is equipped with 8 rows of knives. |
The different alternative settings of the Combi system:-
1) The chaff is spread separately and the straw is collected in a windrow.
2) The chaff is spread separately to the straw which is chopped and spread.
3) The chaff is directed into the straw and windrowed together.
4) The chaff is thrown into the
straw and chopped and spread together.
Comprehensive
Tests:-