Air Seeding Plenum Uniform Flow Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air seeding machines face challenges in directing sufficient airflow from a fan to conduits, leading to irregular airflow and inefficient distribution of commodities like fertilizer or seed.
Innovation Solution
The design includes a plenum with a body portion having a specific shape and arrangement of side walls, primary ports, and butterfly valves to optimize airflow, ensuring uniform distribution and pressure control between the tank and conduits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fan or blower provides air flow to transport commodity through conduits, then commodity transport capability is improved, but airflow distribution uniformity deteriorates
Solution Approach 1:
A plenum chamber is introduced as an intermediary component between the blower and the conduits. The plenum receives airflow from the blower through an inlet, distributes it through multiple ports to various conduits, and includes bleed ports to regulate pressure. This intermediary structure transforms the non-uniform blower output into uniform airflow distribution across all conduits, resolving the contradiction between maintaining high productivity and achieving flow uniformity.
2Device complexity
If airflow is directed from fan to conduits without plenum, then device complexity is reduced, but airflow control precision deteriorates
Solution Approach 1:
The plenum chamber is segmented into multiple functional regions: an inlet for receiving blower airflow, multiple primary ports for distributing to different conduits, and bleed ports for pressure regulation. Each segment performs a specific function, allowing independent control of airflow to different conduits. This segmentation enables precise airflow control without requiring complex external regulation systems for each conduit.
3Stability of the object's composition
If plenum with bleed ports and valves is added to optimize airflow, then airflow distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The plenum chamber serves multiple functions simultaneously: it acts as a flow distribution manifold, a pressure regulation device through bleed ports, and a flow balancing chamber. By consolidating these functions into a single component rather than using separate devices for each function, the system achieves uniform airflow distribution while minimizing the increase in overall device 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
This configuration ensures a uniform and efficient airflow distribution, preventing recirculation and optimizing the delivery of commodities to the soil, maintaining a desired balance between airflow entering and leaving the tank.
Implementation Method 1
a blower including a plurality of fan blades configured to rotate about an axis of rotation to provide air flow to the tank
Implementation Method 2
a plenum including: a body portion including: a first end defining an inlet of the body portion, a second end defining an outlet of the body portion
Implementation Method 3
a bleed port positioned between the body portion of the plenum and the tank
Data Source
AI summary
An air flow system for an air seeding machine includes a tank configured to store an agricultural commodity, a plenum, conduits, and a blower configured to push air flow through the plenum and the conduits to the tank. The plenum includes a uniformly-sloped side wall and geometric first and second ends bounding the side wall. The plenum further includes bleed ports coupled to bleed conduits and configured to conduct air flow to an interior volume of the tanks. The plenum further includes primary ports coupled to primary conduits and configured to conduct air flow to the tanks. The primary conduits receive commodity from the tanks to be deposited in the soil. The geometry of the plenum facilitates an adequate balance of air flow between the primary and bleed conduits so that the commodity most-effectively enters the air stream conducted by the primary conduits.