Hydraulic Roller Press ELD Assembly for Even Pressure Distribution
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Solution Overview
Problem
Existing hydraulic roller presses face issues with uneven load distribution due to edge effects, leading to reduced crushing pressure and spring deflection, which results in material escape and reduced fatigue life of springs.
Innovation Solution
The introduction of an even load distributor assembly (ELD) with a bank of spring plates angled between 0 to 60 degrees, connected by inner and outer rings, and deflection sensing rings to maintain prestress and resist axial forces, ensuring consistent material retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If flat spring is used in the existing prior art, then the structure is simple, but the spring does not provide prestress and material escapes through the cheek plates
Solution Approach 1:
The patent changes the geometric parameters of the spring by curving it into an arc shape with specific radius of curvature, transforming it from a flat spring that cannot provide prestress to a curved spring that maintains continuous contact with the roller surface and provides necessary prestress to prevent material escape
Solution Approach 2:
The spring is designed with a curved arc geometry rather than a flat configuration, allowing it to conform to the roller surface curvature and maintain continuous contact, thereby providing sustained prestress and preventing material escape through the cheek plates
2Reliability
If curved spring is used to provide prestress, then material retention is improved, but the fatigue life span is reduced
Solution Approach 1:
The patent optimizes the curvature radius parameter of the spring, selecting a specific range that provides sufficient prestress for material retention while minimizing stress concentration effects that would reduce fatigue life
Solution Approach 2:
The spring design incorporates localized quality variations through its curved geometry, creating optimal stress distribution patterns that enhance both material retention capability and fatigue resistance by avoiding excessive stress concentration at specific locations
3Reliability
If roller diameter to roller width ratio is increased, then edge effect is reduced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the roller surface into different zones (central region vs. edge region) and applies different functional characteristics to each, with the ELD assembly specifically addressing the edge effect problem rather than requiring a complete redesign of the entire roller geometry
Solution Approach 2:
The ELD assembly acts as an intermediary mechanism between the roller and the material, specifically targeting the edge effect problem by providing additional load distribution capability at the roller edges without changing the fundamental roller dimensions
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
Achieves even load distribution across the rollers, preventing material escape and enhancing spring life by reducing deflection and bending stress, thereby improving grinding efficiency.
Implementation Method 1
The resilient element may comprise multiple spring plates, preferably made of steel. It's a bank of spring plates added to reduce the deflection of the annular disc.
Data Source
AI summary
The invention relates to a roper press for grinding of specific materials such as cement raw materials, cement clinker and similar materials, said roller press comprising two parallelly arranged rollers, roller being a fixed roller, roller being a movable roller, said rollers configured to rotate in opposite direction towards each other and separated by a gap, said fixed roller comprising an even load distributor assembly ELD, said ELD assembly comprising an outer ring and an inner ring, said inner ring being fixed on said fixed roller by a fastening means such as a screw, said inner ring and said outer ring being connected by means of one or more bank of spring plates, said bank of spring plates being fixed at an angle Θ varying from 0 degrees to 60 degrees, said outer ring comprising deflection sensing rings.