Disc Filtration Rim Segmentation for Sector Replacement
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Solution Overview
Problem
Existing disc filtration devices face challenges in positioning tolerance, mechanical deformation, and difficult assembly due to forced quarter turns and uneven stress distribution, which complicates the assembly and maintenance of large discs, especially when replacing damaged sectors.
Innovation Solution
The filtration device employs a rim with detachable connection flanges and a quick spring coupling, along with triangular pockets and elastic cloth clips to securely fasten sectors, allowing for easy assembly and maintenance without dismounting the rim, and a U-shaped rim design for increased rigidity and cake discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded screws are used in the rim to wedge the sectors, then the sectors are secured to the rim, but the stresses caused on the sectors and rim cannot be mastered or distributed appropriately, causing deformations or breaks
Solution Approach 1:
The connection system is segmented into multiple independent elements: radial spacers positioned between adjacent sectors, detachable connection flanges bearing these spacers, and quick spring couplings. This segmentation distributes the securing function across multiple components rather than concentrating stress at screw points, thereby preventing stress concentration and deformation while maintaining securing strength.
2Stability of the object's composition
If a pin integral with the sector pipe is used for positioning, then the sector is held in correct position after a quarter turn, but the positioning tolerance is poor and mechanical deformation risk increases due to forced rotation
Solution Approach 1:
A radial spacer acts as an intermediary element between adjacent sectors, providing a precise positioning reference surface. The spacer's cylindrical geometry and controlled dimensions enable accurate alignment and positioning of sectors without requiring forced quarter-turn rotation, thereby improving positioning tolerance and reducing mechanical deformation risk while maintaining positioning stability.
3Strength
If the rim is made as a single integral piece, then the structure is rigid, but the assembly and maintenance become difficult as replacing sectors requires dismounting the entire rim
Solution Approach 1:
The rim connection system is segmented into detachable connection flanges that can be independently removed. Each flange is associated with specific sectors and can be detached without affecting the entire rim structure. This allows individual sectors to be replaced by simply removing their corresponding flanges, maintaining rim rigidity during operation while enabling easy maintenance and repair.
4Stability of the object's composition
If curvilinear elements of the rim are held during assembly, then the rim structure is maintained, but the assembly becomes difficult and elements are exposed to risks of dismounting before all elements are connected
Solution Approach 1:
Radial spacers are preliminarily positioned between adjacent sectors before the final connection is made. These spacers serve as temporary structural supports that maintain the rim's geometric integrity during the assembly process. The spacers are subsequently secured by the quick spring couplings, eliminating the risk of dismounting while simplifying the assembly procedure.
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 solution simplifies and stabilizes the assembly and maintenance process, reducing the risk of mechanical deformation and allowing for independent sector replacement, enhancing the structural integrity and operational efficiency of large discs.
Implementation Method 1
cooperating with a quick spring coupling to lock the loaded spacer between the sectors
Implementation Method 2
at the longitudinal ends thereof elastic lugs bordering said sectors. Such lugs cover the folds formed at the angle of the pocket
Data Source
AI summary
The disclosure relates to a filtration device that comprises a disc with a rim covering and stiffening a plurality of filtration sectors connected to taps provided on the outer wall of a rotary main shaft containing inner discharge channels and fit-inserted into said taps and into a crown comprising two parts concentric to the shaft, one which is secured to the shaft while the other is removable, characterised in that said rim is provided with openings each intended for receiving a removable connection flange bearing, on the one hand, a radial strut clamped between two adjacent sectors for the relative clamping thereof and interacting, on the other hand, with a spring quick fastener for locking the strut under tension between the sectors. The disclosure also relates to a method for assembling and maintaining said filtration device.