Refiner Stator Dam Orientation for Lignocellulose Flow
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Solution Overview
Problem
The refining surfaces of refiner stators experience blockages due to the direction of guiding surfaces in conventional designs, which restricts the flow of lignocellulose-containing material, leading to decreased production capacity and non-uniformity in the refined material quality.
Innovation Solution
The guiding surface of at least one dam in the refining surface is oriented from the discharge edge to the feed edge, aligning with the practical flow direction of fibers, reducing blockages and enhancing material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the guiding surface of the dam is oriented from the feed edge to the discharge edge (conventional design), then the material flow is restricted and blockages occur, but the structure is simple and easy to manufacture
Solution Approach 1:
The patent inverts the conventional orientation of the guiding surface on the dam. Instead of rising from the feed edge toward the discharge edge, the guiding surface now rises from the discharge edge toward the feed edge. This inversion aligns the guiding surface with the actual flow direction of fibers on the refining surface, preventing blockages and maintaining high production capacity while keeping the structure relatively simple
2Reliability
If the guiding surface rises from the feed edge to the discharge edge, then the material flow direction is controlled, but blockages occur reducing material flow uniformity
Solution Approach 1:
By inverting the orientation of the guiding surface to rise from the discharge edge toward the feed edge, the patent eliminates blockages that occur with conventional orientation. This inversion allows the guiding surface to properly guide fibers along the actual flow direction, ensuring uniform material flow and reliable operation without the harmful blockage effect
Data Source
AI summary
A refining surface (2) of a refiner stator (4) for a refiner for defibrating lignocellulose-containing material has a feed edge (17) oriented in the direction of the feed flow of the material to be refined, and a discharge edge (16) oriented in the direction of the discharge flow of the material refined. The surface (2) has blade bars (10) with grooves (11) therebetween, and at least one dam (12) in a groove (11). The dam has an upwardly rising guiding surface (13) from the blade groove bottom (15) for guiding the material to be refined and the material already refined out of the blade groove. The upward direction of the guiding surface (13) is from the direction of the discharge edge (16) of the refining surface (2) in the direction of the feed edge (17) of the refining surface (2).