Rotating Roll Granular Spreader Flow Control
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Solution Overview
Problem
Current spreader technologies face challenges in uniformly dispensing both easily flowing and flow-resistant granular materials, leading to uneven spread patterns, material wastage, and vehicle handling issues due to varying angles of repose and flow characteristics of materials like salt and sand.
Innovation Solution
A hopper spreader apparatus with a rotating first roll positioned above the conveying unit regulates the flow of granular materials, ensuring uniform dispensing by controlling the flow of high flow materials like dry salt and breaking up low flow materials like wetted sand, using a conveying unit within a trough region with a rotating roll that limits material flow to prevent jamming and ensure consistent distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gravity flow is used to dispense material from the hopper, then the system is simple and low cost, but the flow characteristics vary drastically with material type causing uneven dispensing
Solution Approach 1:
A rotating roll is introduced as an intermediary component between the hopper and conveying unit. This roll receives material from the hopper and actively controls its release to the conveying unit, mediating the flow to ensure uniform dispensing regardless of material properties. The roll's rotation and surface characteristics enable consistent material transfer for both high-flow and low-flow materials.
Solution Approach 2:
The dispensing system transitions from static gravity flow to dynamic controlled flow. The rotating roll provides active, dynamic control over material release timing and rate. By adjusting roll rotation speed and characteristics, the system dynamically adapts to different material flow properties, maintaining uniform dispensing across varying material types.
2Adaptability or versatility
If a drag chain spreader is used to flow a wide range of materials, then material versatility is improved, but initial cost and upkeep are expensive with extensive repairs requiring prolonged down time
Solution Approach 1:
The patent replaces expensive, complex drag chain mechanisms with simpler, more durable components. The rotating roll and conveying unit constitute a less complex system that is cheaper to manufacture and maintain. While individual components may wear, the overall system design reduces initial cost and maintenance burden compared to drag chain spreaders.
Solution Approach 2:
The patent extracts the essential function of material flow control from the complex drag chain mechanism. By isolating and simplifying the flow control to a rotating roll feeding a conveying unit, the system removes unnecessary complexity while retaining the ability to handle various material types.
3Productivity
If an auger spreader is used for high flow materials, then dispensing efficiency is improved, but moisture causes flow characteristics to change drastically requiring frequent setting adjustments
Solution Approach 1:
The conveying unit with rotating roll is designed to universally handle both high-flow materials like dry salt and low-flow materials like wet sand. The system's multi-functionality is achieved through the rotating roll's ability to adapt its flow control characteristics, eliminating the need for frequent setting adjustments when material moisture content changes.
Solution Approach 2:
The system maintains consistent dispensing by adjusting operational parameters of the rotating roll rather than requiring structural modifications. Changes in roll rotation speed or surface characteristics compensate for material flow variations, allowing the same hardware configuration to handle diverse material conditions without frequent user intervention.
4Speed
If the hopper has angled sides to direct material flow, then gravity flow is enhanced, but materials with different angles of repose flow unevenly toward the dispensing system
Solution Approach 1:
The rotating roll serves as an intermediary that receives material from the hopper's gravity flow and actively controls its release. This mediation ensures that even though materials with different angles of repose flow at different speeds and patterns in the hopper, the roll standardizes the output to the conveying unit, achieving uniform dispensing despite varied input flow characteristics.
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 enables efficient and uniform dispensing of both high flow and low flow materials, reducing wastage and improving vehicle handling by maintaining a consistent weight distribution during spreading, resulting in a more even and effective spread pattern.
Implementation Method 1
The hopper will typically have angled sides that direct the flow of material toward the system that delivers the material to the spreading unit
Implementation Method 2
The conveying unit conveys the granular material toward the spreading unit
Implementation Method 3
a rotating first roll positioned above the conveying unit regulates the flow of granular materials, ensuring uniform dispensing by controlling the flow of high flow materials like dry salt and breaking up low flow materials like wetted sand
Data Source
AI summary
In one embodiment, a hopper spreader apparatus for spreading granular material is provided. The hopper spreader apparatus includes a hopper, a spreading unit, and a dispensing unit. The hopper has a storage cavity for storing the granular material to be spread. The spreading unit spreads the granular material. The dispensing system transports the granular material from the hopper to the spreading unit. The dispensing system includes a conveying unit and a rotating first roll. The conveying unit conveys the granular material toward the spreading unit. The rotating first roll controls a flow of granular material from the hopper to the conveying unit. The use of the rotating roll allows for control of high flow material (such as for example dry salt) while allowing for improved collapse and break-up of low flow material (such as for example wetted sand).