Adjustable vane system for an axial flow rotor housing of an agricultural combine
Inactive Publication Date: 2009-04-30
DEERE & CO
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- Application Information
AI Technical Summary
Benefits of technology
[0013]The vanes on the surface of the flat wall section are very easy to adjust, are easy to move, and seal effectively against the flat wall section throughout a range of position adjustment of the adjustable vanes.
[0015]According to the invention, a small angular adjustment of the adjustable vanes eliminates one revolution of crop movement in the separating section of the rotor housing, i.e., advancing the adjusting vanes rearward provides a shortcut for the crop to skip one fixed helical revolution through the paths defined by the fixed vanes.
[0016]This adjustment reduces straw damage in the separator section by a significant amount. As an example, in the case where there are six fixed vanes in the separating section, by adjusting the adjustable vanes, the crop will only pass by five fixed vanes. Such adjustment could lower crop damage 15%. Adjustable vanes allow the farmer or operator to fine-tune the harvesting process to balance grain loss with straw damage to meet individual requirements.
Problems solved by technology
The present inventors have recognized one drawback to adjusting the angle of the vanes is that the vanes conform to a generally curved, cylindrical or oblong, separating section wall or cover.
When the angle of the vanes is changed, the vanes no longer closely conform to the curvature of the wall and gaps can occur.
Gaps can become clogged with crop material and make operation of the adjustable vanes difficult.
Method used
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[0027]While this invention is susceptible of embodiment in many different forms, there are shown in the drawings, and will be described herein in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments illustrated.
[0028]FIG. 1 shows an agricultural combine 10 comprising a supporting structure 12 having ground engaging wheels 14 extending from the supporting structure. The operation of the combine is controlled from operator's cab 15. A harvesting platform 16 is used for harvesting a crop and directing it to a feederhouse 18. The harvested crop is directed by the feederhouse 18 to a beater 20. The beater directs the-crop upwardly through an inlet transition section 22 to the axial crop processing unit 24.
[0029]The crop processing unit 24 threshes and separates the harvested crop material. Grain and chaff fa...
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A adjustable vane system for an axial-flow, rotary combine housing that incorporates at least one flat wall section as part of the otherwise cylindrical or oblong, curved housing cover, and adjustable vanes having flat bases that are angularly adjusted on the surface of the flat wall section. The housing includes fixed vanes on a curved portion of the housing cover that have a lead ends, in a direction of circumferential crop movement, substantially in registry with trailing ends of the adjustable vanes. The adjustable vanes include pivot connections near the trailing ends and swing connections near the lead ends of the adjustable vanes. All of the adjustable vanes are gang together and moved together. A mechanism is provided to swing the adjustable vanes from a position corresponding to the normal helical path of the fixed vanes to a bypass position wherein crop flow through the adjustable vanes will skip one or more passes between the fixed vanes on the next pass through the fixed vanes.
Description
FIELD OF THE INVENTION[0001]The invention relates to housings for axial-flow, rotary agricultural combines.BACKGROUND OF THE INVENTION[0002]Agricultural combines are large machines that harvest, thresh, separate and clean an agricultural crop. The resulting clean grain is stored in a grain tank located on the combine. The clean grain can then be transported from the grain tank to a truck, grain cart or other receiving bin by an unloading auger.[0003]Rotary combines have one or two large rotors for threshing and separating the harvested crop material. In most rotary combines the rotor or rotors are arranged along the longitudinal axis of the machine. These rotors are provided with an infeed section for receiving harvested crop material, a threshing section for threshing the harvested crop material received from the infeed section and a separating section for freeing grain trapped in the threshed crop material received from the threshing section. Examples are shown in U.S. Pat. Nos. 5...
Claims
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Login to View More IPC IPC(8): A01F12/30
CPCA01F7/067
InventorPOPE, GLENNBRUNS, AARON
OwnerDEERE & CO