Particulate Fuel Feed Assembly With Dust Removal and Compact Layout
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Solution Overview
Problem
Solid particulate fuel stoves face issues with dust and debris build-up in the feed system, which reduces efficiency and requires large, heavy gauge metal components for durability, complicating manufacturing and assembly.
Innovation Solution
A compact fuel feed system design featuring a hopper interface with angled sidewalls, a pusher plate assembly, an auger tube, and a dust removal system that directs fines into the auger tube, allowing for easier maintenance and reduced creosote build-up, using lighter gauge metals to minimize size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy gauge steel or metal is used for the feed system to operate in high temperature environment and transport hard, abrasive fuel, then durability and reliability are improved, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The feed system is divided into multiple separable components including the feed tube, pusher assembly, auger, and housing that can be manufactured independently and assembled together. This segmentation allows each component to be optimized for its specific function while simplifying manufacturing and assembly processes, resolving the contradiction between durability and manufacturing complexity.
Solution Approach 2:
Different sections of the feed system use different material gauges and properties tailored to their specific operational requirements. The feed tube uses sufficient gauge for durability, while other components use lighter materials where appropriate. This localized optimization maintains reliability where needed while reducing overall manufacturing complexity.
2Reliability
If heavy gauge steel or metal is used for the feed system to operate in high temperature environment and transport hard, abrasive fuel, then durability and reliability are improved, but assembly time and alignment difficulty increase
Solution Approach 1:
The feed system components are designed as separate, pre-fabricated modules that can be manufactured and tested independently before final assembly. This segmentation reduces on-site assembly time and allows for quality control at each manufacturing stage, resolving the contradiction between durability and assembly time.
Solution Approach 2:
Components such as the feed tube and pusher assembly are pre-assembled and pre-tested before being installed in the final system. This preliminary action ensures proper alignment and fit-up before final installation, significantly reducing assembly time while maintaining the durability required for high-temperature, abrasive service conditions.
3Productivity
If a larger feed system is used to transport sufficient fuel to maintain desired burn rate, then fuel delivery capacity is improved, but available floor space for use decreases
Solution Approach 1:
The feed system is designed with a vertical orientation, extending upward from the firebox rather than occupying horizontal floor space. The feed tube and hopper are positioned vertically above the firebox, allowing the system to achieve high fuel delivery capacity while minimizing the footprint on the floor, thus resolving the contradiction between productivity and available space.
Solution Approach 2:
The auger is nested within the feed tube, and the pusher assembly is positioned within the housing that surrounds the feed tube. This nested configuration allows multiple functional components to occupy the same spatial envelope, maximizing fuel delivery capacity within a compact vertical footprint that preserves floor space.
4Area of stationary object
If the feed system is positioned closer to the firebox to reduce size, then floor space usage is improved, but safety and maintenance accessibility worsen
Solution Approach 1:
The feed system utilizes the vertical dimension by extending upward from the firebox rather than spreading horizontally. This vertical arrangement allows the system to be compact in terms of floor space while maintaining adequate distance from the firebox in the horizontal plane, thus preserving safety clearance while minimizing footprint.
Solution Approach 2:
The feed tube acts as an intermediary component that bridges the gap between the hopper and the firebox. It provides a protected passage for fuel delivery while maintaining physical separation between the fuel storage area and the combustion zone, ensuring safety while enabling efficient fuel transport in a compact configuration.
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 dust and debris accumulation, simplifies manufacturing, enhances safety by increasing the distance between components, and improves maintenance accessibility, while using lighter materials to reduce production costs and noise.
Implementation Method 1
an auger for moving fuel through the auger tube from the infeed end to the delivery end
Implementation Method 2
a dust removal system to direct fines to the passageway
Data Source
AI summary
A fuel feed system for conveying particulate fuel from a hopper to a firebox in a stove is provided. The fuel feed system includes an inlet opening to receive particulate fuel and a fuel collection plate located below the inlet opening. A fuel passageway is located below the plate. The passageway includes a fuel delivery end located in a firebox and a fuel infeed end below the plate. A fuel delivery system moves fuel through the passageway from the infeed end to the delivery end. A motor actuates the fuel delivery system.