Monolithic Screw Hub Sections for Rigidity and Pond Depth
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Solution Overview
Problem
Existing screw hubs in solid bowl centrifuges face limitations in achieving both increased rigidity and flow properties while maintaining a large pond depth, with current designs often compromising structural integrity for improved media permeability.
Innovation Solution
A screw hub design featuring monolithically formed hub sections with interconnected transverse disks and a high number of openings, allowing for modular construction and enhanced rigidity through material bonding or force-fitting connections, enabling a stable and efficient separation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the screw hub is made more permeable to increase pond depth, then the flow properties and pond depth are improved, but the structural rigidity and strength of the screw hub are weakened
Solution Approach 1:
The screw hub is divided into multiple hub sections (first hub section, second hub section, etc.) that are connected to each other. Each hub section can have openings formed in its peripheral wall, allowing the hub to achieve both permeability for increased pond depth and structural integrity through the segmented design with connecting elements.
Solution Approach 2:
Different regions of the screw hub have different properties: the peripheral wall contains openings for media permeability and pond depth, while the hub sections and connecting elements provide structural rigidity. The transverse disks in certain hub sections provide localized structural support while maintaining overall permeability.
2Strength
If the screw hub is made monolithic to increase rigidity, then the structural strength is improved, but the manufacturing complexity and inability to replace worn parts increase
Solution Approach 1:
The screw hub is constructed from multiple separable hub sections that can be manufactured independently and then assembled together using connecting elements. This segmentation allows each section to be manufactured separately (improving ease of manufacture and replacement) while the assembled structure provides the necessary structural rigidity through the connections between sections.
Solution Approach 2:
The modular hub section design allows worn or damaged sections to be individually replaced without replacing the entire screw hub. The connecting elements enable easy assembly and disassembly of hub sections, facilitating maintenance and recovery of the centrifuge system with minimal downtime and cost.
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 design achieves a balance between increased rigidity and flow properties, allowing for a larger pond depth and efficient separation of multiphase mixtures, with the ability to easily replace or repair worn components, reducing operational complexity and costs.
Implementation Method 1
The pond depth can be increased by making the screw hub particularly permeable to media
Implementation Method 2
The bowl rotates at high speed, allowing a multiphase mixture contained within the bowl to be separated into at least one heavy phase and one light phase
Implementation Method 3
the resulting buoyancy and sedimentation effects of the mixture to be clarified or the light phase
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a screw hub (20) for a centrifugal screw (10), comprising at least one monolithically formed hub section (30), in particular at least two interconnected monolithically formed hub sections (30), wherein the at least one hub section (30) has a circumferential wall (31) and two end faces (33, 34), and a plurality of openings (32) are formed in the circumferential wall (31), said hub section (30) having at least one transverse disc (40).