Air Cart Blower Speed Control for Agricultural Metering
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Solution Overview
Problem
Typical air conveyance systems in agricultural product metering systems have limited ability to regulate air flow based on product flow rate, leading to potential blockages or excessive product dispersal due to fixed fan speeds.
Innovation Solution
A system that includes a hydraulics controller and flow control device to adjust fan motor speed based on product flow rate and ground speed, ensuring optimal air flow for efficient product distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fan speed is manually set to a fixed speed, then the air conveyance system is simple to operate, but the air flow cannot be regulated based on product flow rate, leading to blockages or excessive product dispersal
Solution Approach 1:
The fan motor speed is made dynamically adjustable through electronic control circuitry that receives signals from flow meters and automatically modifies the fan speed to match varying product flow rates, replacing the static manual speed setting with a dynamic responsive system
Solution Approach 2:
The system incorporates flow meters that continuously monitor product flow rate and provide feedback signals to the electronic control circuitry, which then adjusts the fan motor speed accordingly, creating a closed-loop control system that maintains optimal air flow matching the product flow
2Reliability
If fan speed is increased to prevent blockages, then air flow to the metering system is sufficient, but product may be blown out of the seeding trench
Solution Approach 1:
The fan speed is dynamically adjusted to match the actual product flow rate, increasing speed only when needed to prevent blockages and decreasing speed when product flow is reduced, thereby preventing excessive air flow from blowing product out of the trench
Solution Approach 2:
Flow meters provide continuous feedback on product flow rate, enabling the electronic control circuitry to precisely regulate fan motor speed to match actual loading conditions, preventing both blockages and excessive product dispersal
3Object-generated harmful factors
If fan speed is decreased to prevent excessive product dispersal, then product is contained in the seeding trench, but air flow becomes insufficient, increasing blockage risk
Solution Approach 1:
The fan motor speed is dynamically controlled to match product flow rate, automatically increasing when product flow increases to maintain sufficient air flow and prevent blockages, and decreasing when product flow decreases to prevent excessive dispersal
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 system effectively regulates air flow to prevent blockages and excessive product dispersal, ensuring consistent and efficient delivery of agricultural products during seeding operations.
Implementation Method 1
a blower configured to provide an air stream for moving metered product toward a distribution device
Implementation Method 2
a flow control device configured to control a flow of hydraulic fluid to a fan motor on the air cart based on the desired fan motor speed
Data Source
AI summary
A system for controlling air flow within an agricultural product metering system is provided. One system for distributing an agricultural product includes an air conveyance system having a blower configured to provide an air stream for moving metered product toward a distribution device. The air conveyance system is mounted on an air cart. The system also includes control circuitry mounted on an agricultural vehicle, and configured to adjust a speed of the blower based at least partially on a product flow rate from the air cart.