Offset Fin Rotor for Agricultural Baler Load Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotor apparatuses for balers apply high loads to the rotary shaft due to simultaneous involvement of multiple blades, leading to potential deformation and reduced service life, despite existing solutions that only partially address load distribution.
Innovation Solution
The rotor apparatus features a rotary shaft with pairs of feeding blades having fins that are offset from each other, allowing sequential involvement and minimizing load on the shaft, with a sinusoidal power curve that reduces peak demand and extends the rotary shaft's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple blades are arranged at the same position on the rotary shaft, then the hay feeding efficiency is improved, but the load on the rotary shaft increases significantly
Solution Approach 1:
The patent transitions from arranging blades only in the radial direction to arranging them in both radial and axial dimensions. The blades are positioned at different angular positions and different axial locations along the rotary shaft, creating a three-dimensional distribution pattern that staggers the engagement of blades with hay, thereby reducing peak loads while maintaining feeding efficiency
Solution Approach 2:
The hay feeding process is segmented into multiple sequential stages by distributing blades at different axial positions. Instead of all blades acting simultaneously on the hay, they engage in a staggered sequence, dividing the total load into smaller increments that occur at different times, thus reducing the peak force on the rotary shaft
2Speed
If multiple blades feed hay simultaneously, then the feeding speed is increased, but the rotary shaft experiences deformation
Solution Approach 1:
The patent creates a dynamic load distribution system where blades are positioned to engage hay at different moments during rotation. The axial offset of blades ensures that as the shaft rotates, blades sequentially engage and disengage from the hay, creating a dynamic rather than static load pattern that prevents cumulative deformation of the rotary shaft
3Duration of action of stationary object
If blades are arranged to reduce load on the rotary shaft, then the service life is extended, but the hay feeding precision may be compromised
Solution Approach 1:
The patent applies different angular offsets to blades at different axial positions along the rotary shaft. Each blade or group of blades has a specific angular positioning optimized for its location, creating local variations in the feeding pattern that maintain precision while distributing load. This localized optimization ensures that hay feeding precision is preserved at each axial station while the overall system benefits from reduced peak loads
Data Source
AI summary
A rotor apparatus for an agricultural machine which includes a pick-up apparatus for picking up hay from the ground and a chamber for receiving the picked-up hay, is configured to feed the hay picked-up from the ground to the compression chamber. The rotor apparatus comprises: a rotary shaft, a plurality of feeding blades pairs, each having a plurality of fins distributed on an outer perimeter of the respective blade, wherein the feeding blades pairs are arranged on the rotary shaft in a way that, for each pair of feeding blades, the fins are offset from the corresponding fins of an adjacent pair of feeding blades, so that, for each pair of feeding blades, each fin is misaligned with any other fin of the other pairs of feeding blades.