Roller Mill Pressure Cylinder Extraction for Wear Reduction
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Solution Overview
Problem
Existing roller mill configurations face challenges in efficiently applying and adjusting mill pressure due to the generation of transverse forces at the contact location between the moment arm and the sleeve, leading to wear and increased installation space requirements.
Innovation Solution
A compact pressure cylinder is positioned outside the mill inner space to apply force to the moment arm, with a pressure bearing allowing relative movement to minimize transverse forces, and a sliding or pivoting mechanism to reduce friction, enabling efficient force transmission and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pressure cylinder is used to apply force to the moment arm inside the mill inner space, then the mill pressure can be adjusted, but transverse forces are generated causing wear and requiring larger installation space
Solution Approach 1:
The pressure cylinder is extracted from the mill inner space and positioned outside it. The force transmission path is modified so that the pressure cylinder acts on a contact location outside the mill inner space, eliminating the harmful transverse forces that would otherwise be generated at the contact location inside the mill space. This extraction resolves the contradiction by removing the source of wear while maintaining the pressure adjustment function.
Solution Approach 2:
A force transmission element (such as a rod or link) is introduced as an intermediary between the pressure cylinder and the moment arm. This intermediary transmits the force from the pressure cylinder applied at the external contact location to the moment arm, enabling force transmission without requiring the pressure cylinder to be positioned inside the mill inner space, thus avoiding the wear problem.
2Ease of operation
If a tension cylinder is used to apply force to the moment arm, then the mill pressure can be adjusted, but the installation space required increases
Solution Approach 1:
The pressure cylinder is extracted from the mill inner space and positioned outside it, utilizing the external space more efficiently. This extraction allows for a more compact overall configuration because the cylinder does not occupy valuable internal mill space, thereby reducing the installation space requirement while maintaining the pressure adjustment capability.
Solution Approach 2:
The force application is shifted from a three-dimensional configuration inside the mill inner space to a two-dimensional arrangement where the pressure cylinder operates externally. This dimensional change allows for more efficient space utilization and a more compact design, as the cylinder can be positioned in the external space without interfering with the internal mill components.
3Force
If the pressure cylinder is positioned inside the mill inner space, then force transmission is direct, but wear and vibrations increase
Solution Approach 1:
The pressure cylinder is extracted from the mill inner space and positioned outside it. The force transmission path is modified through an external contact location and force transmission element, which maintains efficient force transmission while eliminating the wear and vibration problems associated with internal positioning. The extraction allows the system to achieve both effective force transmission and improved reliability.
Solution Approach 2:
A force transmission element serves as an intermediary that maintains efficient force transmission from the externally positioned pressure cylinder to the moment arm. This intermediary ensures that force transmission remains effective while the external positioning eliminates the wear and vibration issues, thereby improving reliability without sacrificing force transmission efficiency.
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 reduces wear, minimizes installation space, and optimizes force transmission, resulting in a more compact and vibration-friendly roller mill design with reduced transverse forces.
Implementation Method 1
a pressure cylinder which is in operative contact with the moment arm in order to adjust the mill pressure which is applied by the mill roller
Implementation Method 2
there is provided between the pressure cylinder and the moment arm at least one pressure bearing which allows relative movement between the pressure cylinder and the moment arm
Data Source
AI summary
The invention relates to a roller mill having at least one mill roller and a rotatable mill platen, which are arranged in a mill inner space, and a moment arm which is retained so as to be pivotably movable and rotationally secure in a bearing, with the mill roller being supported in a rotatable manner at one end of the moment arm and there further being provided means for applying a force to the moment arm comprising a pressure cylinder which is in operative contact with the moment arm in order to adjust the mill pressure which is applied by the mill roller. The contact location, at which the force of the pressure cylinder is transmitted to the moment arm, is located outside the mill inner space.