Bale Forming Apparatus with Crowned Rollers for Uniform Density
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Solution Overview
Problem
Existing apparatus for forming bales of agricultural or forestry biomass struggle to achieve uniform density and a level top, often resulting in uneven stacks and reduced packing efficiency due to limitations in compaction force and structural support.
Innovation Solution
The apparatus employs a crop deflector with a flexible tarp and rollers to continuously compact biomass into uniform layers, using a combination of rigid and flexible components to guide and distribute the biomass evenly, ensuring each layer is flat and of consistent density, while the packer apparatus adjusts its position and orientation to maintain uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a horizontal compaction roller is used to compact biomass in successive layers, then the bale can be formed with a large cross-sectional area, but the density of packing is reduced due to reliance on roller weight alone
Solution Approach 1:
The patent applies counterweight by positioning a heavy stationary structure (the chamber with fixed walls and floor) to provide downward force on the biomass. The chamber itself acts as a counterweight system, using its mass and structural rigidity to compress the biomass layers horizontally, compensating for the insufficient weight of the moving roller alone.
Solution Approach 2:
The patent employs crowned rollers (rollers with a curved or arched cross-section) to compact the biomass. The curved surface of these rollers distributes compression force more effectively across the biomass layer, achieving better density while maintaining the ability to form large bales. The crown shape allows the roller to apply pressure from multiple points simultaneously.
2Device complexity
If the support structure is supported by flexible cables, then the device can be simpler in construction, but the stack becomes uneven due to tilting of the structure
Solution Approach 1:
The patent divides the support function into multiple independent elements: rigid guide rails positioned at multiple locations, separate support rollers, and distributed cable attachments. This segmentation allows each component to perform its specific function independently, preventing cumulative tilting errors and maintaining overall structural stability throughout the compaction process.
Solution Approach 2:
The patent incorporates guide rails and alignment features that are pre-positioned to establish the correct geometric relationship between components before compaction begins. The rigid guide structure is installed and fixed in advance, creating a stable reference framework that prevents tilting during operation, eliminating the need for complex active stabilization systems.
3Quantity of substance
If a large diameter roller is used for compaction, then the device can handle large biomass volumes, but the periphery of the stack is poorly compacted due to guide structure edges occupying peripheral regions
Solution Approach 1:
The patent uses crowned rollers with a curved cross-sectional shape that extends to the periphery of the roller. This curvature allows the roller to maintain contact and apply compression force at the edges of the biomass stack, where guide structure edges would otherwise create gaps. The rounded profile ensures continuous contact pressure across the entire width, including peripheral regions.
Solution Approach 2:
The patent addresses peripheral compaction by moving the compaction function into the vertical dimension through the crown height of the rollers. The elevated curved surface allows the roller to reach over the guide structure edges and apply pressure to the peripheral biomass layers, effectively compensating for the spatial obstruction created by the guide framework.
4Device complexity
If conventional vertical plunger packing is used, then the packing process is simple, but achieving high crop density in large bales is difficult
Solution Approach 1:
The patent replaces the flat surface of conventional plungers with crowned rollers that have a curved cross-section. This curvature allows the rollers to apply compression force more effectively across the biomass, achieving higher density by distributing pressure through a larger contact area and maintaining consistent pressure during the rolling motion, unlike the single-point pressure of vertical plungers.
Solution Approach 2:
The patent implements continuous horizontal rolling compaction that progresses through the biomass layer in a sustained manner. The roller moves continuously along the guide rails, applying compression force throughout the entire length of the biomass stack in successive passes, rather than intermittent vertical plunging. This continuous action achieves more uniform and higher density throughout the bale.
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
This solution allows for the formation of bales with uniform density and a level top, reducing the tendency for biomass to accumulate or slide during transport, and enabling efficient packing with minimal disturbance, thus overcoming the limitations of previous technologies.
Implementation Method 1
The packer apparatus is movable end to end within the chamber for uniformly compacting an incoming stream of biomass into a bale
Implementation Method 2
packing in successive horizontal layers and using gravity force (like packing bunker silos) is believed to be more realistic
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The apparatus forms a unitary bale of agricultural or forestry biomass of uniform density and having a level top. The apparatus includes packer apparatus configured and supported in the chamber for reciprocating movement through a compacting chamber and progressive movement upwardly to form the bale. A crop deflector is supported in the chamber above the packer apparatus for deflecting a stream of the biomass downwardly, and is configured and operable so as to move continuously with the packer apparatus between the ends of the chamber and to substantially constantly reconfigure as a function of a position of the packer apparatus and a direction of the movement thereof so as to deflect the stream of the biomass directly in a path of the packer apparatus in the current direction of the movement thereof so as to be immediately compacted thereby onto the floor or the bale.