Roller Press Floating Roller Removal via Parallel Extraction
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Solution Overview
Problem
The existing methods for changing rollers in roller presses, used for grinding rock and minerals, are complex and labor-intensive, leading to high costs and long downtimes due to the need to dismantle significant parts of the press to expose and transport the rollers, which are subject to high wear and require frequent replacement.
Innovation Solution
A method that involves lowering the loose roller from its operating position relative to the supporting structure before moving it parallel to its axis of rotation, avoiding collisions with the supporting structure and allowing for removal without dismantling large parts of the press, using a transport vehicle with a hoist to lift and move the rollers from underneath, thereby simplifying the process and reducing the need for cranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the roller is moved perpendicular to its axis of rotation to remove it from the supporting structure, then the roller can be exposed for transport, but the supporting structure must be significantly dismantled and the process becomes time-consuming
Solution Approach 1:
Instead of moving the roller perpendicular to its axis of rotation as in conventional methods, the invention moves the roller parallel to its axis of rotation. This inversion of the removal direction allows the roller to be extracted without dismantling the supporting structure, significantly reducing downtime and simplifying the replacement process
2Productivity
If the roller is moved parallel to its axis of rotation without lowering it first, then the movement path is shorter, but the roller collides with the supporting structure
Solution Approach 1:
Before moving the roller parallel to its axis of rotation, the invention first lowers the roller from its operating position using a hoist. This preliminary action creates clearance between the roller and the supporting structure, preventing collision during the parallel movement and enabling safe, rapid roller extraction
3Ease of repair
If conventional roller removal methods are used, then the roller can be transported away, but significant parts of the press must be dismantled and labor costs increase
Solution Approach 1:
The invention inverts the conventional removal approach by moving the roller parallel to its axis rather than perpendicular to it. This fundamental change in movement direction eliminates the need to dismantle supporting structure parts, greatly simplifying the replacement process and reducing device complexity
Solution Approach 2:
The invention introduces a hoist as an intermediary device to lower and facilitate the movement of the roller parallel to its axis. This intermediary mechanism enables the simplified removal process without requiring complex dismantling operations on the press structure
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 approach significantly speeds up the roller replacement process, reduces downtime, and minimizes the effort required, allowing for efficient maintenance and operation of the roller press by avoiding collisions and the need for extensive dismantling of the supporting structure.
Implementation Method 1
using a transport vehicle with a hoist to lift and move the rollers from underneath
Data Source
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AI summary
The present invention relates to a method for dismounting rollers (3, 4) of a roller press (1) standing on a foundation, the roller press (1) comprising at least one supporting structure (2), at least two rollers (3, 4) mounted on the supporting structure (2), and at least one pressing device (5), wherein the rollers (3, 4) are, during operation of the roller press (1), in each case rotated about an axis of rotation (6, 7), wherein in each case one axis of rotation (6, 7) extends in a longitudinal direction of the associated roller (3, 4), wherein the axes of rotation (6, 7) are oriented parallel to one another and horizontally, such that the rollers (3, 4) jointly delimit a grinding gap (8) into which the material for grinding can be introduced and then ground between the rollers (3, 4), wherein at least one of the rollers (3, 4) is in the form of a floating roller (4) which interacts with at least two pivoting devices (9, 10), wherein the floating roller (3) is, in the oppositely situated end sections thereof, mounted in each case on a mounting point (11) of a pivoting device (9, 10), wherein the at least one pressing device (5) acts, at an action point (12), on at least one of the pivoting devices (9, 10) such that the floating roller (4) can, by way of the action of the pressing device (5), be pivoted relative to the rest of the supporting structure (2) about a pivot axis (13) by way of the pivoting devices (9, 10), whereby a spacing between the axes of rotation (6, 7) of the floating roller (4) and of the other roller (3) is variable, comprising the following method steps: a) The rollers (3, 4) are detached from the supporting structure (2). b) The rollers (3, 4) are removed, wherein at least the floating roller (4) is, after being detached from the supporting structure (2), moved in a direction parallel to the axis of rotation (7) thereof relative to the supporting structure (2). To provide a method which simplifies a changeover of the rollers in relation to the prior art, the invention proposes the following method step: c) The floating roller (4) is, before the movement thereof parallel to the axis of rotation, lowered proceeding from its operating position relative to the supporting structure (2).