Adjustable vanes for use in a cylindrical rotor cage of an agricultural harvester
An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester. The vane system includes a vane having a generally helically curved inner profile; a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane; a first flat portion proximate an end of the vane on the outer profile; and a second flat portion proximate to another end of the vane on the outer profile.
1. An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester, the vane system comprising:
a vane having:
a generally helically curved inner profile;
a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being positioned closer to the rotor cage than the inner profile;
a first flat portion proximate an end of the vane on the outer profile;
a second flat portion proximate to an other end of the vane on the outer profile; and
further comprising a third flat portion located midway along the outer profile.
2. The adjustable vane system of claim 1 , wherein the third flat portion is larger than the first flat portion and the second flat portion.
3. The adjustable vane system of claim 1 , wherein the first flat portion and the second flat portion are of a similar size.
4. The adjustable vane system of claim 1 , further comprising:
a first coupling device connected to the vane at the first flat portion; and
a second coupling device connected to the vane at the second flat portion.
5. The adjustable vane system of claim 4 , further comprising:
a first bushing extending through the rotor cage and in contact with the first flat surface; and
a second bushing extending through the rotor cage and in contact with the second flat surface.
6. The adjustable vane system of claim 5 , wherein the first bushing and the second bushing have different lengths.
7. The adjustable vane system of claim 5 , wherein the coupling devices extend through the bushings.
8. The adjustable vane system of claim 6 , wherein the lengths of the bushings allow movement of the vane up to a predefined distance from the rotor cage.
9. The adjustable vane system of claim 8 , wherein the predefined distance is approximately 4 mm or less.
10. A threshing system for use in an agricultural harvester, the threshing system comprising:
a rotor cage with a plurality of slots therein, the rotor cage having a generally cylindrical inner surface; and
a plurality of adjustable vanes pivotally coupled to the rotor cage, each vane having: a generally helically curved inner profile;
a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being positioned closer to the rotor cage than the inner profile;
a first flat portion proximate an end of the vane on the outer profile;
a second flat portion proximate to an other end of the vane on the outer profile; and
wherein each vane further comprises a third flat portion located midway along the outer profile.
11. The threshing system of claim 10 , wherein the third flat portion is larger than the first flat portion and the second flat portion.
12. The threshing system of claim 10 , wherein the first flat portion and the second flat portion are of a similar size.
13. The threshing system of claim 10 , wherein each vane has:
a first coupling device connected to each vane at the first flat portion; and
a second coupling device connected to each vane at the second flat portion.
14. The threshing system of claim 13 , wherein each vane has:
a first bushing extending through the rotor cage and the first bushing is in contact with the first flat surface; and
a second bushing extending through the rotor cage and the second bushing is in contact with the second flat surface.
15. The threshing system of claim 14 , wherein the first bushing and the second bushing have different lengths.
16. The threshing system of claim 14 , wherein the coupling devices extend through the bushings.
17. The threshing system of claim 15 , wherein the lengths of the bushings allow movement of the vane up to a predefined distance from the rotor cage.
18. The threshing system of claim 17 , wherein the predefined distance is approximately 4 mm or less.