Truncated Conical Separation Disc with Ribs
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Solution Overview
Problem
Centrifugal separators face challenges in maximizing separating capacity due to the use of thin separation discs, which can lead to irregular shapes and uneven interspaces, resulting in reduced rigidity and inefficient phase flow, especially when compressed in a stack.
Innovation Solution
The introduction of a truncated conical separation disc with elongated ribs and spot-formed spacing members that guide sludge along the disc surface, maintaining interspaces and enhancing flow dynamics, allowing for the use of thinner discs while maintaining rigidity and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separation discs are made thinner to maximize the number of discs in the stack, then the separating capacity increases, but the rigidity of the discs decreases and irregularities in shape appear
Solution Approach 1:
The separation disc is segmented into multiple functional elements: a thin base disc for maximizing quantity, spot-formed spacing members for maintaining uniform interspaces, and elongated ribs for providing structural support. This segmentation allows each element to perform its specific function optimally while working together as an integrated system.
Solution Approach 2:
The separation disc employs a composite structure combining the thin disc material with integrated spacing members and elongated ribs. This composite design enables the thin disc to maintain its lightness and quantity advantage while the integrated structural elements provide the necessary rigidity and shape stability.
2Productivity
If separation discs are made thinner to increase the number of discs in the stack, then more interspaces are created, but unevenly sized interspaces appear due to disc flexing and irregular shaping
Solution Approach 1:
The spot-formed spacing members are integrally formed with the separation disc itself, making the disc self-sufficient for maintaining uniform interspaces. The spacing members automatically compensate for any thinness-related flexing or irregularities, ensuring consistent interspace dimensions without requiring external adjustment or complex assembly procedures.
Solution Approach 2:
The spacing members and elongated ribs are pre-formed as integral parts of the separation disc during manufacturing. This preliminary formation ensures that the structural support and spacing functions are built-in from the start, preventing uneven interspaces before the discs are stacked and compressed into service.
3Stability of the object's composition
If separation discs are compressed in the stack to form a tight unit, then the stack stability increases, but thin discs flex and provide inadequate height in certain parts of the interspaces
Solution Approach 1:
The elongated ribs are strategically positioned and dimensioned to provide preemptive structural reinforcement against the compression forces that will be applied when the discs are stacked. These ribs act as built-in cushions or supports that prevent excessive flexing and maintain adequate interspace height even under the compressive loads of a tight stack.
4Manufacturing precision
If spot-formed spacing members are used to decrease the risk of unevenly sized interspaces, then interspace uniformity improves, but the flow of phases between the discs may be impeded
Solution Approach 1:
The separation disc design applies local quality by concentrating the spacing function at specific spot-formed locations while leaving other areas open for fluid flow. The spot-formed spacing members are strategically positioned to provide necessary support and uniformity only where required, while the elongated ribs provide localized guidance for sludge flow, allowing unimpeded phase flow in the remaining interspace areas.
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 design increases the number of separation discs that can be fitted in a stack, improving the separating capacity and maintaining even interspaces, leading to consistent separation performance and reduced risk of contamination.
Implementation Method 1
During operation, fluid mixture that is about to be separated is introduced into a rotating bowl and due to the centrifugal forces, heavy particles or denser liquid, such as water, accumulates at the periphery of the rotating bowl whereas less dense liquid accumulates closer to the central axis of rotation.
Data Source
AI summary
A separation disc for a centrifugal separator is adapted to be included in a stack of separation discs inside a centrifugal rotor for separating a fluid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending from at least one of the inner surface and the outer surface. The spot-formed spacing members are for providing interspaces between mutually adjacent separation discs in a stack of separation discs. The separation disc further includes at least one elongated rib extending from the inner surface to a height (h) that is less than the height (H) to which the plurality of spacing members extend. Further, at least one elongated rib extends from first position on the inner surface to a second position on the inner surface. The second position is at a radial distance that is larger than the radial distance of the first position, and the relation between the height of the elongated ribs (h) and the spacing members (H) are h/H>0.7.