Conveyor Roller Lagging Shear Stop Design
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Solution Overview
Problem
Conveyor roller surface arrangements with metal-backed lagging sections are costly to manufacture and maintain due to the need for specialized equipment and storage of pre-made sections, and they require labor-intensive fastening or welding for attachment, leading to unplanned shutdowns when bond failures occur.
Innovation Solution
A surface arrangement for conveyor rollers featuring shear stop members that resist lagging movement, reducing shear forces on bonds and allowing for easier removal and replacement of worn or damaged lagging members, with a design that enables a more gradual failure of individual lagging sections rather than the entire system, facilitating planned maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional continuous lagging is used on conveyor rollers, then the surface provides continuous friction contact with the conveyor medium, but bond failure spreads quickly across the entire lagging causing critical system failures and unplanned shutdowns
Solution Approach 1:
The lagging is divided into multiple discrete modular sections that can fail independently without affecting the entire lagging system. Each section is separated by gaps or spacing features, allowing localized failure while maintaining functionality of remaining sections, thus preventing system-wide shutdowns and enabling continued operation until planned maintenance.
2Strength
If metal-backed lagging sections are used to strengthen attachment, then the bond strength between lagging and roller is improved, but manufacturing costs and maintenance complexity increase due to specialized equipment and storage requirements
Solution Approach 1:
The lagging sections are designed as simple, inexpensive, replaceable elements without complex metal backings. Each section can be easily manufactured and replaced when worn, eliminating the need for expensive specialized manufacturing equipment and extensive storage of pre-made sections, while maintaining sufficient attachment strength for the application.
3Area of stationary object
If lagging sections are made as continuous bonded layers, then the surface coverage is complete and smooth, but removal and replacement of worn lagging requires labor-intensive fastening or welding operations
Solution Approach 1:
The lagging is segmented into discrete modular sections with defined boundaries and spacing features. This segmentation allows individual sections to be removed and replaced independently through simple operations, eliminating the need for labor-intensive fastening or welding required by continuous bonded lagging systems.
Solution Approach 2:
The lagging sections are designed with dynamic replaceability, allowing the system to transition from a fixed continuous state to a maintainable modular state. The spacing features and gap structures enable easy insertion and removal of sections, making the lagging system adaptable to maintenance requirements without compromising operational coverage.
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 reduces manufacturing, maintenance, and repair costs by allowing for the gradual failure of individual lagging sections, enabling continued operation until a planned shutdown for maintenance, thus minimizing downtime and adverse consequences compared to conventional systems.
Implementation Method 1
at least one shear stop member adapted to resist movement of the abutting lagging member in at least one direction along the circumference of the rotatable supporting surface to reduce a shear force exerted on the bond
Data Source
AI summary
A surface arrangement for a conveyor roller adapted for use in a conveyor system configured to support and move a conveyor medium, and a conveyor roller incorporating same. The surface arrangement has a cylindrical rotatable supporting surface, at least one shear stop member extending outwardly from the rotatable supporting surface, at least one lagging member positioned on the rotatable supporting surface, and a bond between the at least one lagging member and the rotatable supporting surface. The at least one lagging member is positioned on the rotatable supporting surface, with at least a portion of one end of the at least one lagging member abutting at least a portion of the side surface of the at least one shear stop member. The at least one shear stop member is adapted to resist movement of the at least one abutting lagging member in at least one direction along the circumference of the rotatable supporting surface to reduce a shear force exerted on the bond when the conveyor roller is in use. Methods of making and repairing the surface arrangement are also disclosed.