Single Flight Screw Pump Radial Load Balance
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Solution Overview
Problem
Single flight screw pumps in high-pressure applications face radial load imbalances, leading to inefficiencies and increased power requirements, particularly in compactor applications where debris handling is challenging without preprocessing, and existing solutions like double flights are impractical due to steep inclines or jamming issues.
Innovation Solution
A single flight screw design with a shaft end cut at an angle to manage radial forces, combined with a spring housing assembly for balanced axial loading, eliminating radial loads and reducing power input by distributing tangential force effectively across the screw length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single flight screw is used in high pressure pump application, then the device complexity is reduced and ease of operation is improved, but radial load imbalance increases exponentially leading to increased power requirements
Solution Approach 1:
The patent applies the counterweight principle by introducing a balanced axial loading mechanism that generates an opposing force to neutralize the radial load imbalance caused by the single flight screw. The balanced axial loading is positioned to create a counteracting effect that eliminates the exponential increase in radial load, thereby reducing power input requirements while maintaining the simplicity of the single flight structure
2Stability of the object's composition
If double flights are used to neutralize radial loads, then radial load balance is improved, but the flight spacing is cut in half creating jam points for large debris
Solution Approach 1:
The patent applies segmentation by dividing the screw structure into distinct functional zones: a single flight section that maintains large debris passage capability, and a balanced axial loading section that provides radial load neutralization. This segmentation allows each zone to perform its specific function optimally without the constraints of a dual-flight design throughout the entire screw length
3Shape
If double flights are wrapped at steep incline to achieve proper flight spacing, then flight spacing is improved, but power requirements increase beyond acceptable limits
Solution Approach 1:
The patent applies local quality by providing different geometric characteristics to different sections of the screw. The single flight section has optimized incline angles for efficient debris conveyance with acceptable power requirements, while the balanced axial loading section provides the necessary geometric configuration for radial load neutralization. Each local section is optimized for its specific function rather than requiring the entire screw to conform to a steep incline double-flight design
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
This configuration reduces power requirements by up to 40% and prevents low pressure pathways, enhancing compaction efficiency and preventing liquid reabsorption, while handling large debris without preprocessing, by utilizing the radial force to fill voids and maintain high dry solids content.
Implementation Method 1
Contained in the spring housing is a resistant spring assembly, comprising opposing convex single leaf spring, elements
Data Source
AI summary
A single flight screw, a single flight high pressure screw pump and the use of the pump in a compactor for compacting and dewatering debris commonly found in waste water. The bore, screw diameter and the flight spacing are constant and the compression force is mostly axial. The work is done at the very end of the screw.