Segmented Wear Liner Retention Device for Mill Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wear liner retention devices in milling operations are difficult to tighten effectively, requiring powerful torque tools and pose safety risks due to the need for personnel to be inside the mill during installation.
Innovation Solution
A wear liner retention device comprising a shank structure with a threaded and unthreaded region, an inner nut structure within the wear liner, and an outer nut structure outside the shell, allowing for easier clamping and reduced risk of injury by enabling secure attachment with lower speed torque tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional retaining bolts with integral head regions are used, then the wear liner can be secured to the shell, but the device requires powerful high speed torque tools and exposes personnel to increased injury risk
Solution Approach 1:
The retaining bolt is divided into separate components: a shank structure with threaded regions, a separate nut structure, and an additional nut structure. This segmentation allows the fastening system to be assembled and installed in a safer, more manageable way while maintaining the required clamping force through the distributed threading mechanism.
Solution Approach 2:
The unthreaded intervening region acts as an intermediary element between the two threaded regions, allowing the shank to engage with both nut structures at different locations. This intermediary section enables the distribution of installation forces and reduces the torque requirements compared to a single integral bolt design.
2Reliability
If conventional retaining bolts are used, then the wear liner can be attached to the shell, but installation personnel must be inside the mill for extended periods exposing them to injury risk
Solution Approach 1:
The shank structure is prepared with multiple threaded regions and the unthreaded intervening region before installation. This preliminary configuration allows the fastening system to be installed from outside the mill, eliminating the need for personnel to remain inside the mill for extended periods while ensuring secure attachment through the distributed threading mechanism.
Solution Approach 2:
The nut structures are extracted as separate components that can be installed from outside the mill, removing the need for personnel to be inside the mill during the tightening process. This extraction of the fastening mechanism from the confined space eliminates the associated safety risks while maintaining attachment security.
3Strength
If conventional retaining bolts are used, then the wear liner can be secured, but the installation process is time-consuming and requires extended personnel presence
Solution Approach 1:
The segmented design with separate nut structures allows for parallel installation operations and reduces the time personnel need to be inside the mill. The shank structure with its multiple threaded regions enables efficient engagement with both nuts, reducing overall installation time while maintaining the required clamping force through the distributed threading mechanism.
Solution Approach 2:
The unthreaded intervening region serves as a mediator that enables the shank to engage with both nut structures efficiently. This intermediary design facilitates quicker installation by allowing simultaneous or sequential engagement of both nuts without requiring extended personnel presence inside the mill, thereby reducing installation time while maintaining secure attachment.
Data Source
AI summary
A wear liner retention device wear liner retention device comprises a shank structure, a nut structure, and an additional nut structure. The shank structure comprises a threaded region, an additional threaded, and an unthreaded region intervening between the threaded region and the additional threaded region. The nut structure is configured to threadably couple to the threaded region of the shank structure. The additional nut structure is configured to threadably couple to the additional threaded region of the shank structure. Related assemblies and methods are also described.