Electric Fluid Pump Metering System for Planter Row Units
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Solution Overview
Problem
Existing agricultural planter metering systems face increased maintenance costs and complexity due to flexing fluid lines and the need for hydraulic systems, which are costly and complex, especially when transitioning between working and transport configurations.
Innovation Solution
A metering system with an electrically-driven fluid pump and a controller that adjusts fluid pressure differentials to enhance accuracy and reduce maintenance, eliminating the need for central pumps and hydraulic systems by using independent electric pumps for each row unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a central pump with fluid lines is used to establish air pressure differentials in multiple row units, then the system can control agricultural product flow across multiple rows, but the fluid lines must be regularly inspected and maintained due to repeated flexing during configuration transitions, increasing maintenance costs
Solution Approach 1:
The patent divides the centralized pump system into multiple independent electrically-driven fluid pumps, with each row unit having its own pump. This segmentation eliminates the need for long fluid lines that flex during configuration transitions, as each pump is locally positioned at its respective row unit and connects directly to the metering device without requiring extensive fluid line routing.
2Ease of operation
If a central pump with hydraulic system is used to drive the metering system, then the agricultural product flow can be controlled, but the hydraulic lines and valve assemblies increase the cost and complexity of the planting implement
Solution Approach 1:
The patent replaces the hydraulic system with an electrically-driven system. Each row unit is equipped with an electrically-driven fluid pump that directly controls the fluid pressure differential across its metering device, eliminating the need for hydraulic lines, valve assemblies, and other hydraulic components. This substitution of electric actuation for hydraulic actuation reduces system complexity and cost.
3Device complexity
If an electrically-driven fluid pump is used for each row unit, then the fluid lines and hydraulic systems are eliminated reducing maintenance and complexity, but the system requires independent electric pumps for each row unit increasing initial component count
Solution Approach 1:
The patent employs multiple instances of the same standardized electrically-driven fluid pump component across different row units. Each pump performs the identical function of establishing fluid pressure differential across its local metering device, allowing for modular design, simplified procurement, and ease of replacement. This universal application of a single component type across multiple locations offsets the increased component count through standardization.
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 improves the accuracy of agricultural product deposition by controlling fluid pressure differentials, reduces maintenance costs, and simplifies the system by eliminating the need for complex hydraulic setups, thereby enhancing operational efficiency and reducing costs.
Implementation Method 1
an electrically-driven fluid pump fluidly coupled to the housing and configured to establish a fluid pressure differential between opposite sides of the metering device
Implementation Method 2
The controller is configured to control operation of the electrically-driven fluid pump to control the flow rate of the agricultural product through the row unit
Data Source
AI summary
A metering system for an agricultural planter row unit includes a controller configured to iteratively perform a first set of operations, including receiving a sensor signal indicative of an agricultural product flow rate through the agricultural planter row unit, comparing the agricultural product flow rate to a target agricultural product flow rate range, returning to receiving the sensor signal indicative of the agricultural product flow rate in response to determining the agricultural product flow rate is within the target agricultural product flow rate range, comparing a fluid pressure differential between opposite sides of a metering device of the metering system to a maximum threshold fluid pressure differential in response to determining the agricultural product flow rate is outside of the target agricultural product flow rate range, and increasing the fluid pressure differential in response to determining the fluid pressure differential is less than the maximum threshold fluid pressure differential.