Refiner Plate Bushing for Angular Alignment
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Solution Overview
Problem
Existing refiner plate segment mounting systems face challenges in achieving precise angular positioning and balance due to manufacturing tolerances and the lack of features for precision alignment, leading to vibration and potential damage from uneven distribution of segments.
Innovation Solution
A bushing system that centers the bolt within the bolt apertures of the refiner plate segments and disk, ensuring accurate angular alignment and eliminating the need for shims by sliding over the bolt shaft and fitting between the bolt and aperture, thereby maintaining segment balance and alignment during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mounting bolts with clearance holes are used to fasten plate segments to the disk, then ease of installation is improved, but manufacturing precision deteriorates due to angular position variation
Solution Approach 1:
A positioning pin is introduced as an intermediary component between the mounting bolt and the plate segment aperture. The positioning pin fits precisely in the aperture and guides the bolt during installation, ensuring that the bolt enters the aperture at the correct angular position. This mediator resolves the contradiction by maintaining precision without compromising ease of installation.
2Stability of the object's composition
If shims are used to compensate for segment clearances and maintain balance, then balance quality is improved, but device complexity increases
Solution Approach 1:
The positioning pin is pre-installed in the plate segment aperture before the mounting bolt is inserted. This preliminary action ensures that the aperture is properly aligned with the disk's threaded hole before fastening occurs. By performing this alignment action in advance, the need for shims to adjust balance is eliminated, as the positioning pin inherently ensures proper angular positioning and balance.
3Ease of operation
If multiple segments are installed with cumulative clearances, then ease of installation is improved, but balance quality deteriorates due to uneven segment distribution
Solution Approach 1:
The positioning pin acts as a mediator that prevents cumulative clearance errors from affecting balance. Each segment's aperture receives its own positioning pin, which independently ensures correct angular positioning relative to the disk. This eliminates the cumulative effect of clearances because each segment is positioned independently and precisely, maintaining balance quality while allowing easy installation.
Data Source
AI summary
A bushing to assist in positioning a bolt in the bolt apertures of refining plates and disk. The bushing is a cylindrical sleeve that slides over the bolt shaft, before the bolt is inserted into the aperture. The bushing may be short relative to the length of the bolt and the aperture. The bushing fits between the bolt and aperture in the refining plate and/or disk, as the bolt engages the threads of the plate and/or disk. The bolt is centered in the aperture and the centered bolt ensures that the plate segment is properly positioned on the disk as the bolt fastens the segment to the disk.