Adjustable Screen Arrangement for Horizontal Grinding Machines
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Solution Overview
Problem
Existing horizontal grinding machines lack adaptability and ease of maintenance, as they require replacing entire screen areas when worn, and do not allow for customization of screen clearances to accommodate different materials effectively.
Innovation Solution
An adjustable screen arrangement with independently positionable arcuate screens and adjusting members, including cams and set-screws, that allow for varying clearances between screens and the grinding drum, enabling customization and allowing for partial screen replacement without stopping the grinding operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire screen area is replaced when worn, then the screening function is restored, but the maintenance time and complexity increase
Solution Approach 1:
The screen arrangement is divided into multiple independent screen sections (first screen and second screen) that can be replaced individually. Each screen is supported by separate screen supports that can be independently removed and replaced, allowing partial replacement rather than complete replacement of the entire screen area.
2Adaptability or versatility
If fixed screen clearances are used, then the machine structure is simple, but the adaptability to different materials is reduced
Solution Approach 1:
The screen supports are made adjustable rather than fixed, allowing the clearances between screens and the grinding drum to be varied. The adjusting members enable dynamic repositioning of screen supports along the grinding drum axis, allowing operators to optimize clearances for different materials and operating conditions.
3Ease of repair
If the grinding operation is stopped for screen replacement, then the screens can be maintained, but the productivity decreases
Solution Approach 1:
The screen arrangement is divided into multiple independent screen sections that can be replaced individually without stopping the entire grinding operation. The independent screen supports allow one screen to be replaced while the other continues to function, minimizing production interruption.
4Productivity
If uniform screen clearances are used, then the machine design is simplified, but the grinding efficiency for different materials is reduced
Solution Approach 1:
Different clearances can be established at different locations along the grinding drum axis by independently adjusting each screen support. This allows optimization of local grinding conditions for different material types and sizes, with each screen section having its own adjustable clearance independent of the others.
Data Source
AI summary
A grinder having an adjustable screen arrangement. The adjustable screen arrangement including two screens independently positionable in a number of positions relative to a grinding drum. Each screen further having a leading end independently positionable relative a trailing end of the screen. The adjustable screen arrangement allowing for selectively varied clearances between the screens and the grinding drum.