Defibrator Center Ring Steam Management
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Solution Overview
Problem
The interaction between steam and material flow in a defibrator leads to irregular material processing, affecting the quality of pulp, as back-traveling steam interferes with the material flow, despite existing efforts to improve steam evacuation.
Innovation Solution
A center ring with a circumferential groove and inner surface wings and channels that collect and redirect steam away from the material flow, reducing interaction between steam and incoming material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If steam evacuation openings are provided in the center ring, then steam removal is improved, but material flow irregularity increases due to steam-material interaction
Solution Approach 1:
The center ring is segmented into multiple functional zones: an outer circumferential groove for steam collection, radial channels for steam transport, and inner wings for material flow management. This segmentation allows steam and material to be handled in separate zones, preventing their harmful interaction while maintaining effective steam evacuation.
Solution Approach 2:
The circumferential groove acts as an intermediary structure that intercepts back-travelling steam before it can reach the material flow path. The groove collects steam and directs it through channels to evacuation openings, serving as a buffer zone that prevents direct steam-material interaction.
2Productivity
If steam collection groove is added to the center ring, then steam evacuation efficiency is improved, but device complexity increases
Solution Approach 1:
The center ring is designed as a multi-functional component that simultaneously performs steam collection, steam transport, and material flow guidance. The circumferential groove collects steam, the channels transport it radially, and the wings guide material, all within a single integrated structure, avoiding the need for multiple separate components.
Solution Approach 2:
The steam collection groove, channels, and evacuation openings are merged into a single integrated steam management system within the center ring structure. This combines multiple steam evacuation functions into one unified component, reducing overall system complexity while improving efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures a smooth material flow and improved processing quality by effectively separating steam and material flows, maintaining the center ring's cleanliness and efficiency over time.
Implementation Method 1
the steam flows backwards towards the location where the material is fed into the defibrator
Implementation Method 2
a number of channels extending from the groove to positions on the inner surface where the wings are provided
Implementation Method 3
Wood chips fed into the center of the refining discs are displaced towards the circumference of the discs through the impact of a centrifugal force
Data Source
AI summary
The invention relates to a center ring arrangeable on a refining disc of a defibrator for refining of fibrous material, wherein said center ring comprises a circumferential outer surface, a circumferential inner surface and a centrally located through-hole adapted to receive fibrous material fed from a feeding device, wherein said outer surface is provided with a circumferentially running groove opening up on the outer surface and being adapted to collect steam produced during operation of said defibrator, and wherein the center ring further comprises a plurality of wings provided on said inner surface and a number of channels extending from said groove to the positions on said inner surface where said wings are provided.