Interlaced Blade Bars Prevent Buckling in Refiner Segments
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Solution Overview
Problem
Existing refiners for refining fibrous materials face challenges in maintaining the structural integrity of blade bars at the feed groove, leading to potential buckling and reduced efficiency in material refinement.
Innovation Solution
The interlacing of blade bars at the feed groove creates a strong blade bar configuration where the interlaced bars support each other, preventing buckling and enhancing the structural strength of the blade segment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If blade bars are arranged in a conventional configuration at the feed groove, then the structure is simpler and easier to manufacture, but the blade bars are prone to buckling and structural failure
Solution Approach 1:
Multiple blade bars are merged into an interlaced configuration where they overlap and support each other at the feed groove, creating a combined structural system that prevents buckling through mutual reinforcement rather than relying on individual bar strength
Solution Approach 2:
The blade bars are arranged in multiple layers or dimensions at the feed groove area, with some bars extending above and below others, creating a three-dimensional interlaced structure that provides structural support in multiple directions and prevents buckling
2Productivity
If blade bars are made longer to maintain cutting edge contact, then refining efficiency improves, but the risk of buckling and structural failure increases
Solution Approach 1:
The blade bars are combined in an interlaced arrangement where shorter bars work together to provide the same functional length and refining efficiency as a single long bar, while distributing the structural load across multiple shorter elements to prevent buckling
Solution Approach 2:
The cutting edge function is segmented across multiple blade bars rather than relying on a single long bar, allowing each segment to be structurally independent and less prone to buckling while collectively maintaining continuous cutting edge contact with the material
Data Source
AI summary
A blade segment (4, 8) for a refiner (1) for refining fibrous material has a first (20) and a second (21) end edge and a first (22) and a second (23) side edge opposite to the first side edge (22) and a refining surface (5, 9) having blade bars (27, 27a, 27b) and grooves (28, 28a, 28b) therebetween on a front surface (25). At least one opening (14, 15) is on at least at one side edge (22, 23) which extends through the whole thickness of the blade segment body (24). There is at least one feed groove (29) on the refining surface, the feed groove (29) extending from the opening and crossing the blade bars and the blade grooves for feeding the material to be refined across the refining surface. The blade bars (27, 27a, 27b) of the blade segment are interlaced at the feed groove.