Agitator Mill Drivers for Radial Grinding Body Circulation
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Solution Overview
Problem
In agitator mills, particularly full-volume disk mills, the grinding bodies do not move dynamically enough in the free spaces between grinding disks, leading to inadequate grinding due to insufficient contact with the grinding material, especially near the agitator shaft.
Innovation Solution
The introduction of drivers, specifically bushings with non-circular surface profiles and tapers, that provide a radial movement component to the grinding bodies, enhancing their circulation and movement towards the agitator shaft, thereby increasing the grinding effect and reducing 'leadings'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If grinding bodies are used in full-volume disk mills with large free spaces between grinding disks, then the mill can handle voluminous materials, but the grinding bodies do not move dynamically enough leading to inadequate grinding
Solution Approach 1:
A driver element is introduced as an intermediary component between the agitator shaft and the grinding bodies. This driver element actively imparts radial movement to the grinding bodies, mediating the interaction between the rotating shaft and the grinding material, thereby ensuring dynamic movement and effective grinding contact
Solution Approach 2:
The system transitions from static grinding body arrangement to dynamic movement by introducing the driver element that actively propels grinding bodies radially outward and inward. This creates continuous motion and circulation of grinding bodies through the material, transforming the grinding process from passive to active
2Device complexity
If grinding bodies remain stationary in free spaces between grinding disks, then the structure is simple, but contact with grinding material is insufficient leading to 'leadings'
Solution Approach 1:
The driver element serves as a mediator that bridges the gap between the agitator shaft rotation and the grinding bodies, transferring mechanical energy to create radial movement. This intermediary mechanism ensures uniform grinding contact without complicating the overall structure
3Ease of operation
If grinding bodies are not actively moved radially, then the circulation pattern is simple, but grinding contact near the agitator shaft is inadequate
Solution Approach 1:
The driver element introduces dynamic radial movement to the grinding bodies, transforming the simple circulatory pattern into an active multi-directional motion pattern. This creates effective grinding contact near the agitator shaft by actively propelling grinding bodies into the material rather than relying on passive circulation
Solution Approach 2:
The driver element creates periodic radial impulse movements of grinding bodies as they rotate with the agitator shaft. This periodic radial ejection and return motion ensures continuous contact with the grinding material, maintaining grinding effectiveness throughout the rotation cycle
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 improved circulation of grinding bodies results in enhanced grinding efficiency by ensuring more dynamic movement and increased contact with the material, leading to a more effective grinding process.
Implementation Method 1
These drivers circulate synchronously with the grinding disks during grinding. These drivers additionally provide a movement component in the predominantly or in the essentially radially outwards direction to at least a portion of the grinding bodies, which come into contact with them, in that they displace these grinding bodies directly in response to the circulation thereof
Implementation Method 2
Collisions and overrolling motions between the solids of the grinding material suspension pumped through the grinding container 2 and the grinding bodies are caused due to the movement of the grinding bodies. These collisions and overrolling motions lead to the chipping of fine particles from the solids in the grinding material suspension
Implementation Method 3
A feed pump is used for this purpose. The feed pump flow of this fluid carries the material to be ground through the agitator mill 1
Implementation Method 4
The grinding bodies are entrained in the circumferential direction of the grinding container 2. They roll on one another, on the grinding container 2 and on the grinding disks 4 in a grinding manner thereby
Data Source
AI summary
An agitator mill, in particular in the form of a full-volume disk mill, with a grinding container, an agitator shaft circulating therein about a horizontal axis, which carries several grinding disks, which are connected thereto in a rotationally fixed manner and which are spaced apart from one another in the direction of the horizontal axis, wherein the grinding disks each have slots or apertures, wherein the agitator mill has drivers in the region between two grinding disks, which drivers circulate synchronously with the grinding disks during grinding and which provide a movement component in the radially outwards direction to at least a portion of the grinding bodies, which come into contact with them, in that they displace these grinding bodies directly in response to the circulation thereof, preferably in the radial direction.