Grinding Roller Eccentric Sleeve Adjustment Mechanism
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Solution Overview
Problem
Existing grinding roller devices in roller mills face challenges in efficiently adjusting the grinding gap and compensating for wear, requiring lengthy downtimes and complex adjustments that increase energy consumption and maintenance costs.
Innovation Solution
The introduction of a movable eccentric sleeve that allows for vertical and axial adjustments of the grinding roller, enabling precise adjustment of the grinding gap and compensation for wear without compromising the roller mill's housing integrity, using a clamping device for axial fixation and an actuating element for external adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed central bearing of the axis is used directly in the sleeve-like receptacle, then the structure is simple and stable, but the grinding roller cannot be adjusted vertically or axially to compensate for wear
Solution Approach 1:
The patent transforms the static fixed bearing arrangement into a dynamic adjustable system by introducing an eccentric sleeve that can rotate and displace axially. The eccentric sleeve (10) with its variable wall thickness allows the grinding roller to be positioned at different vertical and axial locations, enabling wear compensation while maintaining a relatively simple overall structure.
Solution Approach 2:
The bearing arrangement is segmented into multiple functional components: the sleeve-like receptacle (4), the eccentric sleeve (10), and the clamping device (19). This segmentation allows each component to perform its specific function independently - the receptacle provides structural support, the eccentric sleeve enables adjustment, and the clamping device secures the axis (5), collectively achieving adjustability without excessive complexity.
2Productivity
If welding or armouring is used to compensate for wear on the roller shell, then the grinding surface can be restored, but the roller mill must be stopped for extended periods and cooled down
Solution Approach 1:
Instead of restoring the grinding surface after wear occurs, the patent enables preliminary action by adjusting the position of the grinding roller before significant wear affects performance. The eccentric sleeve mechanism allows operators to preemptively reposition the roller to compensate for anticipated wear, maintaining optimal grinding conditions without stopping production for extended periods.
Solution Approach 2:
The patent replaces the traditional thermal-based wear compensation method (welding/armouring requiring cooling down) with a mechanical adjustment system. The eccentric sleeve mechanism provides a purely mechanical solution that adjusts the roller position without involving heat processes, eliminating the need for cooling down and extending operational continuity.
3Manufacturing precision
If the grinding roller is made adjustable in the vertical direction, then the grinding gap can be optimized, but the housing integrity and sealing may be compromised
Solution Approach 1:
The patent extracts the adjustment mechanism from the main housing structure by placing it within the sleeve-like receptacle (4), which is itself integrated into the housing. The eccentric sleeve (10) and clamping device (19) are contained within this receptacle, allowing vertical adjustment of the grinding roller while the housing maintains its overall integrity and sealing. The adjustment functions are 'taken out' as a self-contained subsystem.
4Manufacturing precision
If complex adjustment mechanisms are used to achieve precise grinding roller positioning, then grinding gap optimization is improved, but the device complexity and maintenance requirements increase
Solution Approach 1:
The patent achieves precise positioning by changing the geometric parameter of the eccentric sleeve - specifically its variable wall thickness distribution. By rotating the eccentric sleeve to different angular positions and displacing it axially, the effective radius changes, providing precise control over the grinding roller's vertical and axial position. This parameter-based approach simplifies the mechanism compared to multi-component adjustment systems.
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 solution allows for rapid, precise adjustments of the grinding roller, reducing downtime and energy consumption, while maintaining the roller mill's sealing integrity, and optimizing the grinding process by minimizing weight shifts and improving precision in setting the grinding gap.
Implementation Method 1
relocate it to a movable, eccentric sleeve, so that rotation or twisting of the eccentric sleeve in the lever, for example by 20° to 90° or 180°, a vertical adjustment of the grinding surface of the grinding roller with respect to the grinding table is possible
Implementation Method 2
the sleeve-like receptacle has at least one clamping device for non-rotatable and having axial fixation of the axis in the eccentric sleeve
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a grinding-roller apparatus for a roller mill, having a sleeve-like mount for fixing the spindle of the grinding roller, wherein the grinding roller is mounted for rotation at the end region of the spindle, and in a fixed state in the axial direction, and wherein the sleeve-like mount has at least one clamping device for the conjointly rotatable and axial fixing of the spindle in the mount. The invention is characterized in that the sleeve-like mount has an inner eccentric sleeve to provide for adjustability of the spindle of the grinding roller, and in that the eccentric sleeve is arranged to provide at least for the rotary adjustment of the spindle in the sleeve-like mount, and/or in that the eccentric sleeve is accommodated in a displaceable manner in the sleeve-like mount to provide for axial displacement of the spindle of the grinding roller in the axial direction.