Agitator Ball Mill Shaft Protection Sleeve Segmentation
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Solution Overview
Problem
Agitator mills face high manufacturing and assembly costs, as well as increased structural space requirements due to the complex assembly of disk segments on the agitator shaft, which can lead to unintentionally large construction and safety concerns.
Innovation Solution
The agitator mill features a rotating shaft protection sleeve divided into sections with flanges and disk-like agitator bodies connected via pins, allowing for a non-rotatable, sandwich-like configuration that reduces assembly complexity and increases the usable grinding chamber volume by minimizing radial space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disk segments are screwed to the agitator shaft using radial screw connections, then the agitator bodies can be securely mounted, but the manufacturing and assembly costs increase significantly
Solution Approach 1:
The shaft protection sleeve is divided into multiple sleeve sections that can be separately manufactured and assembled. Each sleeve section carries a flange that simplifies the connection to agitator bodies, eliminating the need for complex radial screw connections while maintaining secure mounting
Solution Approach 2:
The flange is integrated directly onto each sleeve section, combining the mounting function into a single component. This merging of the flange and sleeve section eliminates separate fastening mechanisms, reducing both manufacturing complexity and assembly costs while ensuring reliable connection
2Reliability
If through-counterbores are provided in disk segments for screw connections, then agitator bodies can be fastened to the shaft, but the required material thickness increases leading to larger construction space
Solution Approach 1:
The connection system is segmented into discrete sleeve sections with integrated flanges that connect to agitator bodies using pins rather than through-counterbores. This segmentation allows for thinner disk segments since the pin connection through the flange requires less material thickness than traditional screw connections
Solution Approach 2:
The flange acts as an intermediary component between the sleeve section and the agitator body. It provides a mounting surface that requires minimal radial space while ensuring secure fastening through pin connections, thereby reducing the overall radial dimensions of the agitator assembly
3Reliability
If complex assembly procedures are used for mounting disk segments, then secure connection is achieved, but the assembly time and complexity increase
Solution Approach 1:
The agitator assembly is divided into modular sleeve sections that can be pre-assembled and then quickly mounted onto the agitator shaft. This segmentation enables a simple sequential assembly process where each section is independently positioned and secured, dramatically reducing overall assembly time while maintaining connection security
Solution Approach 2:
The flanges are pre-integrated onto the sleeve sections during manufacturing, so that during assembly only the sleeve sections themselves need to be mounted onto the shaft. This preliminary integration of the flange structure eliminates complex on-site assembly operations, reducing assembly time while ensuring reliable connections
Data Source
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AI summary
A stirred mill (1) with a grinding chamber (7) containing a grinding element and a stirring shaft (3) rotating therein, which carries a shaft protection sleeve rotating with it and several disc-shaped stirring elements (12) non-rotatably connected thereto, which move the grinding elements, characterized in that the shaft protection sleeve is divided into several sleeve sections (17), each of which carries a flange (19, 20) at its end end (18), wherein each disc-shaped stirring element (12) has a coupling section (14) which is held between the flanges (19, 20) of a preceding and a subsequent sleeve section (17), wherein the non-rotatable connection between the flanges (19, 20) and the disc-shaped stirring element (12) is effected by the fact that the stirring element (12) and the flanges (19, 20) are penetrated by pins (21) positioned with their pin longitudinal axis parallel to the axis of rotation of the stirring shaft (3).