Swath Lifter With Flexible-Strip Rotor for Uniform Drying
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Solution Overview
Problem
Existing harvesting technologies fail to uniformly dry crop material in swaths, leading to over-drying at the top and under-drying at the bottom, which can cause damage and affect storage quality.
Innovation Solution
A rotor-based apparatus with angled tines and flexible strips that lift and manipulate crop material, allowing for controlled drying by spreading, fluffing, and twisting the swath to promote uniform drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the swath is left to dry naturally from the top down, then the top material dries quickly, but the material at the bottom remains too wet and may be damaged
Solution Approach 1:
The apparatus inverts the natural drying pattern by mechanically lifting and turning the swath to expose the bottom surface to air circulation. The rotor with tines flips the swath upside down, allowing the previously wet bottom material to dry just as effectively as the top, thereby preventing moisture damage while maintaining drying speed.
Solution Approach 2:
The rotating rotor with tines creates a dynamic mechanical action that continuously moves and repositions the crop material. This mechanical vibration and movement prevent moisture accumulation at the bottom by constantly exposing different surfaces to air flow, ensuring uniform drying throughout the swath.
2Reliability
If the swath is lifted and turned to dry more uniformly, then drying uniformity improves, but the complexity of the drying apparatus increases
Solution Approach 1:
The rotor is segmented into multiple rows of tines arranged at angularly spaced positions around the rotor perimeter. Each tine acts as an independent lifting element, distributing the swath lifting function across multiple discrete points. This segmentation allows the complex turning action to be achieved through simple, repeating geometric patterns rather than complex mechanisms.
Solution Approach 2:
The apparatus uses a flexible belt or strip that wraps around the rotor and extends beyond its perimeter. This flexible element works in conjunction with the tines to guide and control the swath material during the lifting and turning process, providing a simple yet effective mechanism for directing the crop material without requiring complex structural components.
3Device complexity
If conventional pickup mechanisms are used, then the structure is simple, but the pickup action is insufficient when the swath is difficult to lift
Solution Approach 1:
The rotor is designed as a curved, cylindrical structure that rotates horizontally. This curved geometry allows the tines to engage with the swath material and wrap around the rotor surface, providing a more effective lifting action compared to straight, conventional pickup mechanisms. The curvature enables the tines to gradually raise and turn the swath rather than attempting to lift it vertically in one motion.
Solution Approach 2:
The pickup mechanism transitions from a static or slow-moving conventional design to a dynamic rotating rotor system. The rotor rotates at controlled speeds, allowing the tines to dynamically engage, lift, and turn the swath material. This dynamic action significantly improves pickup effectiveness for difficult-to-lift swaths while maintaining reasonable mechanical simplicity through the use of rotational motion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus enhances crop drying uniformity, reduces damage, and improves handling by lifting and manipulating the swath to achieve optimal moisture levels for storage.
Implementation Method 1
a plurality of flexible strips of a resilient material; each strip being located in front of a respective one of the rows of tines so that, as the rotor rotates forwardly relative to the ground, the strip is presented to the swath on the ground in advance of the tines
Implementation Method 2
a support rotor mounted on the frame for rotation around a longitudinal axis of the drum with the axis of the rotor arranged generally transversely across the swath; a drive arrangement driving the drum in rotation
Implementation Method 3
The lifting apparatus can also be used for other purposes such as lifting the swath in advance of a pickup, so as provide an improved action of the pickup and reduce crop left in the field when the swath is difficult to lift
Data Source
AI summary
A swath lifter includes a rotor over which the crop is carried with the rotor driven in a direction so that an underside of the rotor adjacent the ground is driven opposite to the direction of movement. The rotor carries rows of tines at angularly spaced positions around the rotor each associated with a flexible strip of a resilient material located in front of the tines and covering an inner part of the tines with the outer part exposed. The rotor can be arranged with its axis inclined to a line at right angles to the forward direction thus tending to carry the crop to one side to direct the cop onto an adjustable swath guide board to cooperate to form the swath into a desired condition. The rotor can be used as a front member in a pickup for example for a baler.