Roll Neck Dismounting Device with Segmented Pressure Chambers
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Solution Overview
Problem
Existing dismounting devices for roll neck components require long designs and high pressures due to excessive idle strokes, necessitating large spaces and inefficient operation.
Innovation Solution
A dismounting device with a pressure shoulder ring coupled directly to the neck bush, utilizing a gap between the ring and the roll neck end face, and a pressure medium or mechanical spring to apply force, eliminating idle strokes and allowing for small pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional dismounting device is used with bearing assembly support on bearing bush shoulder, then the bearing assembly can be dismounted, but the device becomes very long and requires large space due to multiple idle strokes
Solution Approach 1:
The dismounting process is segmented into two independent stages: first dismounting the bearing assembly from the bearing bush, then dismounting the neck bush from the roll neck. This is achieved by providing two separate pressure chambers - a first pressure chamber between the bearing assembly and bearing bush, and a second pressure chamber between the neck bush and roll neck - allowing each component to be extracted independently without requiring the entire assembly to travel the full dismounting distance.
2Ease of operation
If conventional dismounting devices are used with small piston areas, then dismounting can be achieved, but large pressures must be applied to operate the unit
Solution Approach 1:
The total pressure requirement is segmented and distributed across two separate pressure chambers with their own pistons. The first piston applies pressure to dismount the bearing assembly, and the second piston applies pressure to dismount the neck bush. This segmentation allows each piston to have optimized area for its specific task, reducing the peak pressure requirements compared to a single small-area piston handling the entire dismounting operation.
Solution Approach 2:
The pressure application is extended into the radial dimension by utilizing the large end face area of the roll neck. The second pressure chamber is positioned radially outward from the roll neck axis, allowing the use of the large circular end face area of the roll neck as the effective piston area, thereby reducing the pressure required to dismount the neck bush.
3Ease of operation
If multiple idle strokes are required in the dismounting operation, then the bearing assembly can be removed, but the dismounting unit must travel a large distance
Solution Approach 1:
The dismounting operation is segmented into two independent extraction operations that can be performed in sequence without returning the dismounting unit to its initial position. The first pressure chamber dismounts the bearing assembly while the second pressure chamber simultaneously or subsequently dismounts the neck bush, eliminating the need for idle return strokes between operations.
Solution Approach 2:
The dismounting process maintains continuous useful action by arranging the two pressure chambers such that both extraction operations proceed without interruption or idle movement. The bearing assembly and neck bush are dismounted in a continuous sequence where the dismounting unit remains engaged with the components throughout the process, eliminating idle strokes and reducing total operation time.
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
The solution enables a short, efficient dismounting process with reduced pressure requirements, minimizing space needs and eliminating the need for large driving shoulders, while ensuring reliable pressure application through sealing and efficient fluid or mechanical means.
Implementation Method 1
a pressure medium for removing the neck bush and the chock be provided in the gap
Implementation Method 2
seal the pressure shoulder ring from the roll neck shoulder by at least one sealing device
Data Source
AI summary
A device for dismounting the neck bush (4), the bearing bush (5), and the chock (6) from the conically constructed region of the roll neck (2) of a roll (1), where a pressure shoulder ring (8), which is supported on the end face of the neck bush (4), is installed on a roll neck shoulder (3) of the roll (1), is to be improved in such a way that it can be built very short and that it can carry out the dismounting movement with very small pressures of a pressure medium. To this end, it is proposed that a gap (11) be provided between the pressure shoulder ring (8) and the end face (7) of the roll neck (2), that the pressure shoulder ring (8) be coupled with the neck bush (4), and that at least one pressure medium for removing the neck bush (4) and the chock (6) be provided in the gap (11).