Balanced Fan Plenum with Angled Vanes for Airflow Distribution
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Solution Overview
Problem
Agricultural product delivery systems face inefficiencies due to static pressure imbalances across distribution lines, leading to higher power consumption and reduced performance, as sectional control mechanisms often result in uneven airflow distribution.
Innovation Solution
A plenum system with angled vanes is used to symmetrically or asymmetrically configure plenum chambers, dividing airflow into multiple components and directing them through separate chambers, ensuring balanced airflow and minimizing pressure drop, thereby optimizing fan efficiency and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sectional control is implemented to allow differing product distribution rates in various sections, then adaptability is improved, but static pressure imbalances occur across distribution lines leading to higher power consumption
Solution Approach 1:
The plenum is segmented into multiple plenum chambers separated by plenum vanes, with each chamber serving a specific distribution line. This segmentation allows independent airflow control for each section while maintaining balanced static pressure across all lines, eliminating the need to overcompensate for pressure imbalances and reducing overall power consumption.
Solution Approach 2:
Each plenum chamber is configured with specific dimensions and vane angles tailored to its corresponding distribution line requirements. This local optimization ensures that each section receives appropriate airflow while maintaining overall system pressure balance, allowing sectional control without the energy penalties associated with conventional systems.
2Productivity
If fan operates at higher power consumption level to ensure minimum airflow to all lines, then productivity is improved, but energy efficiency deteriorates
Solution Approach 1:
The plenum vanes are configured to create equipotential flow distribution, where each plenum chamber maintains equivalent static pressure despite varying airflow demands. This allows the fan to operate at optimal efficiency points while delivering sufficient airflow to all lines, achieving productivity goals without excessive energy consumption.
3Reliability
If plenum length is increased to allow airflow development, then airflow quality is improved, but device complexity and space requirements worsen
Solution Approach 1:
The plenum chambers are arranged in a symmetrical configuration with vanes positioned at specific angles to create three-dimensional airflow paths. This spatial arrangement allows sufficient airflow development length within a compact footprint, achieving reliable airflow distribution without excessive plenum length or system complexity.
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 solution achieves balanced airflow distribution, reducing power consumption and improving performance by maintaining airflow separation and balance across all lines, even during sectional control, and compensating for imbalanced fan effects.
Implementation Method 1
a plenum coupled to a fan divides an airflow into multiple airflow components, each airflow component being directed through a plenum chamber, with each plenum chamber being separated from an adjacent plenum chamber by a plenum vane
Data Source
AI summary
The present invention provides a plenum configured to evenly separate and distribute airflow generated by a fan into distribution lines of an agricultural machine. The plenum can utilize angled vanes symmetrically or asymmetrically arranged to form plenum chambers to provide a balanced airflow which contributes to maximizing fan efficiency, including power consumption and performance (airflow and static pressure). Accordingly, the plenum can be configured to separate the airflow and minimize imbalance between the lines during sectional control. The plenum height can be maintained for increased manufacturability and to prevent additional expansion. The plenum length can be configured within allowable space constraints of the machine yet allow airflow to develop upon separation into the lines. Vanes throughout the span of the plenum initially divide the airflow from the fan and maintain separation until the outlets.