Scroll Conveyor Tile Protection Dovetail Locking
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Solution Overview
Problem
Existing solutions for protecting centrifuge scroll flights from wear and abrasion are either costly, complex, or fail to provide adequate ortho-radial support, often requiring additional materials like glue or costly machining processes.
Innovation Solution
A mechanical locking system connects the support and wear-resistant insert using a dovetail locking mechanism, eliminating the need for glue or welding, allowing for rapid assembly and ensuring secure clamping without additional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protection elements are fabricated using carbon tungsten or ceramics, then wear resistance is improved, but assembly complexity increases due to delicate assembly requirements and thermal expansion differences
Solution Approach 1:
The protection element is divided into two distinct parts: a support structure (made of steel) and a wear-resistant insert (made of carbon tungsten or ceramics). This segmentation allows each part to be optimized for its specific function while simplifying the overall assembly process through modular design.
Solution Approach 2:
A steel support acts as an intermediary between the flight and the ceramic/carbon tungsten insert. The support provides a compatible interface for standard assembly methods (rivets, welds, or mechanical retention) while the insert provides the wear resistance, thus mediating between the flight structure and the abrasive environment.
2Strength
If rivets or welding are used to assemble protection elements, then fixation strength is improved, but risk of alteration due to high temperature welds increases
Solution Approach 1:
The steel support acts as a sacrificial or replaceable component that can be assembled using standard, reliable methods (rivets or welds) without concern for thermal damage to the expensive ceramic insert. If the support shows signs of stress or damage, it can be replaced without replacing the wear-resistant insert.
3Reliability
If drilling is used to fix wear-resistant elements, then fixation reliability is improved, but implementation cost and difficulty increase
Solution Approach 1:
The steel support serves multiple functions: it provides structural attachment to the flight, holds the wear-resistant insert, and distributes mechanical stresses. This multi-functionality eliminates the need for specialized drilling operations, as the support can be attached using standard riveting or welding processes.
4Reliability
If additional maintaining parts like glue or plates are used, then tile lodging is improved, but device complexity and cost increase
Solution Approach 1:
The support and insert are merged into a single functional unit where the support's geometry and attachment features are integrated with the insert retention mechanism. This merging eliminates the need for separate maintaining parts like additional plates or complex gluing systems, as the support itself provides both structural and retention functions.
Data Source
AI summary
A scroll conveyor tile protection or any other material subject to wear with a weldable support and a wear resistant insert, not necessary weldable. The support is fit with a flat surface and shoulder allowing for precise positioning of tile on a scroll flight to be protected. At least one opening, preferably at its center, allows for insertion and assembly of a complementary shaped insert. The unit setting up on the scroll flight and the contact between the flight faces and the unit faces allows for creating a dove tail locking system. Welding of the support permanently insures locking of the system and insert being maintained without being otherwise fixed beyond this mechanical clamping.