Nutating Irrigation Device Baffle Plate Asymmetry
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Solution Overview
Problem
Existing irrigation systems face issues with drag, wear, and vibration due to the distribution of irrigation liquid over circular areas near the wheels of self-propelled trusses, leading to increased maintenance costs and inefficient soil irrigation.
Innovation Solution
A liquid-emitting device with a support structure and a rotating baffle plate that allows for sector-shaped irrigation, using a removable kit to convert existing devices for distributing liquid over a sector area, reducing precessional motion and wear, and incorporating a diverting member to direct the liquid jet effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the baffle plate rotates under liquid jet pressure to distribute irrigation liquid over a circular area, then the liquid distribution function is achieved, but the wheels experience increased drag and may form furrows in the soil
Solution Approach 1:
The patent modifies the symmetric circular distribution pattern by introducing an asymmetric baffle plate configuration with a cutout portion. This asymmetric design redirects the liquid jet to create a sector-shaped distribution area that excludes the wheel path region, thereby reducing drag while maintaining irrigation coverage.
Solution Approach 2:
The baffle plate acts as an intermediary element between the liquid jet and the soil. By positioning and configuring this intermediate component with specific geometry (cutout portion), it mediates the liquid flow to achieve sector-shaped distribution that protects the wheel area from direct irrigation, reducing drag forces.
2Object-affected harmful factors
If the emitting device is supported on the side facing away from the forward-moving direction to distribute liquid downstream, then wheel drag is reduced, but the equipment becomes bulky and installation costs increase
Solution Approach 1:
The baffle plate serves multiple functions: it redirects the liquid jet to create sector-shaped distribution, defines the irrigation pattern geometry, and protects the wheel area from irrigation. This multi-functional component achieves drag reduction without requiring additional bulky structures or complex arrangements.
Solution Approach 2:
The baffle plate is designed to rotate under liquid jet pressure, creating a dynamic irrigation pattern. This dynamic capability allows the device to adapt the distribution area while maintaining a compact structure, avoiding the need for bulky fixed configurations.
3Quantity of substance
If toothed surfaces are used to control baffle plate rotation and limit liquid distribution area, then rotational speed control is achieved, but construction complexity and cost increase
Solution Approach 1:
The patent employs composite functional surfaces on the baffle plate, combining toothed portions for controlled interaction with the support structure and toothless portions for unrestricted rotation. This composite design integrates multiple control functions into a single component, achieving area control without excessive complexity.
4Speed
If the baffle plate continues to rotate over the toothless portion, then rotational motion is maintained, but liquid is distributed outside the intended soil area
Solution Approach 1:
The baffle plate features locally differentiated surfaces: toothed portions that engage with the support structure to control rotation and limit the distribution area, and toothless portions that allow free rotation for speed enhancement. This local quality differentiation enables simultaneous achievement of speed control and area limitation.
5Productivity
If contact surfaces of the emitting device parts are exposed to wear, then the device operates, but oscillating vibrations occur leading to failure and increased maintenance costs
Solution Approach 1:
The patent designs the contact surfaces between the baffle plate and support structure with wear compensation features, such as replaceable wear rings or cushioning elements, that anticipate and mitigate wear-induced vibrations before they lead to failure, thereby extending device life and reducing maintenance.
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 reduces drag, wear, and vibration, enhancing the durability and reliability of the device while allowing for efficient sector-shaped irrigation, reducing maintenance costs and ensuring continuous soil irrigation.
Implementation Method 1
The baffle plate is able to normally rotate about a vertical axis under the pressure exerted by the liquid jet
Implementation Method 2
The baffle plate is adapted to intercept the liquid jet from the feeding line and to act as a diverter to uniformly direct it to a circular area of soil to be irrigated
Implementation Method 3
The support structure and the emitter have respective toothed surfaces which are designed to interact to control the rotation of the plate relative to the support
Implementation Method 4
have respective substantially circular toothless portions to impart a greater rotational speed to the plate and limit the amount of liquid distributed in the corresponding circular area of the soil
Implementation Method 5
the contact surfaces of the various parts of the emitting device are exposed to wear, which leads to the generation of oscillating vibrations of the plate
Data Source
AI summary
A liquid-emitting device for gravity-based irrigation systems includes a support structure that defines a first axis and has a nozzle for generating an irrigation jet coaxial with the first axis, a tubular body below the support structure, and a baffle plate facing the nozzle and rotatably mounted in the tubular body to rotate about a second axis. The nozzle is stationary and the second axis is free to rotate about the first axis with a precessional motion. Guides are removably coupled to the tubular body to interact with the baffle plate and prevent the precessional motion while allowing the rotational motion about the second axis. A diverting member may be removably positioned downstream from the nozzle to distribute the liquid over an area of the soil. An arrangement of a nutating liquid-emitting device in combination with an anti-nutating adaptation kit is also disclosed.