High-Pressure Roller Press End Rollers for Uniform Gap Feeding
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Solution Overview
Problem
Existing high-pressure roller presses face challenges in maintaining uniform material supply and reducing wear at end plates due to non-uniform gap widths and high friction, particularly when oblique positions of main rollers occur, leading to inefficiencies and increased maintenance costs.
Innovation Solution
The introduction of biased end rollers mounted rotatably and independently of the end plates, combined with material-guiding pockets, allows for non-parallel main roller positions and reduces friction, ensuring uniform material distribution and minimizing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If end plates are made movable and biased against the press frame to accommodate oblique main roller positions, then the roller press can handle non-uniform material supply and maintain operation, but the end plates are subject to high wear and require wear-protection layers
Solution Approach 1:
The end plate is segmented into a base end plate and separate wear protection elements (plate-shaped and pin-shaped elements) that can be independently replaced. This allows the wear-prone portions to be replaced without replacing the entire end plate structure, addressing the wear issue while maintaining the movable, biased design for adaptability.
Solution Approach 2:
Wear protection elements are selectively applied to specific high-wear zones of the end plate, particularly in the compression zone where contact with material occurs. This local reinforcement provides enhanced durability where needed while preserving the overall movable and biased functionality of the end plate.
2Ease of operation
If spring-mounted end plates are used to allow oblique positions, then operation continues with non-uniform material supply, but friction at the end plates increases and wear is accelerated
Solution Approach 1:
Rolling elements (rollers or balls) are introduced as intermediary components between the end plate and the material stream. These rolling elements reduce direct frictional contact by converting sliding friction into rolling friction, thereby reducing wear and heat generation while allowing the end plate to maintain its biased, movable position for continuous operation.
Solution Approach 2:
The sliding contact mechanism between the end plate and material is replaced with a rolling contact mechanism using rolling elements. This substitution reduces the harmful frictional forces and wear while maintaining the same functional capability of accommodating oblique positions and non-uniform material supply.
3Productivity
If the movable main roller is displaced relative to the fixed main roller to create non-uniform gap width, then material distribution can be adjusted, but the end plates experience increased stress and wear
Solution Approach 1:
The end plate design incorporates movability and biasing mechanisms that allow dynamic adjustment and accommodation of the main roller displacement. The end plate can move and spring back during operation, dynamically adapting to the changing gap width and stress conditions, which reduces stress concentration and wear while maintaining productivity through adjustable material distribution.
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
This configuration enhances comminution and compacting performance by improving material distribution and reducing wear, thereby increasing the efficiency and longevity of the roller press.
Implementation Method 1
In DE 10 2018 108 690 [US 2021/0121892], elastic deformation of the flanges is permitted.
Implementation Method 2
The movable main roller can be biased toward the fixed main roller via force-generating means, for example hydraulically and/or pneumatically
Implementation Method 3
They are not rigidly fastened to the press frame, but can be pressed back against a biasing force, for example spring-loaded
Data Source
AI summary
A high-pressure roller press has a press frame and two main rollers rotatable about respective main-roller axes in the press frame, together forming a filling funnel level with the main-roller axes, and having a gap width that is variable during operation of the roller press. Respective end plates axially flank and delimit the filling funnel between axially outwardly directed end faces of the main rollers. Respective end rollers are movable axially inward toward the end plates with each end roller laterally adjacent the main rollers vertically level with the roller gap, rotatably mounted about its end-roller axis, and laterally delimiting the roller gap, the end rollers being movable relative to the respective end plates. The end plates can each be urged by biasing forces axially toward of the respective main-roller end faces, whereas they are axially outward against the biasing forces during operation of the roller press.