| 摘要 |
An improved pivot irrigation tower system is provided. The system includes a pivot operatively connected to a water source, a plurality of movable towers, a plurality of spans, and a plurality of sprinklers. One or more inverted airfoils are connected to, or incorporated into the design of, the pivot irrigation system to generate a downward force and/or to reduce drag on the system in response to the relative wind at a specific angle of attack. The system may include opposing pairs of inverted airfoils along a majority of the spans. The inverted airfoils may have means for removal of liquid from the top surfaces. The inverted airfoils may be rigidly and/or pivotally connected to the movable towers and/or the spans. The inverted airfoils may be designed with high camber and/or high camber angle. The quantity of the inverted airfoils may be greater at distances farther from the pivot. |
| 主权项 |
1. An airfoil pivot irrigation tower system comprising:
a pivot irrigation system having:
a. a pivot operatively connected to a center point;b. a plurality of movable towers;c. a plurality of spans having a truss system, each of the plurality of spans connected to at least two of the towers;d. a plurality of sprinklers operably connected to the pivot and coupled to the plurality of spans; and one or more inverted airfoils connected to the pivot irrigation system, each of the one or more inverted airfoils having a camber, a camber angle, a top surface, a bottom surface, a centerline, a leading edge, an angle of attack, and a trailing edge; wherein the inverted airfoils prevent toppling of the pivot irrigation system in high wind conditions. |
