Modular Agitator Wear Protection for Stirred Ball Mill
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Solution Overview
Problem
Existing wear protection solutions for agitator ball mills inadequately address wear on both agitator bodies and other components in contact with grinding materials and auxiliary grinding bodies, leading to increased maintenance costs and potential contamination.
Innovation Solution
A modular wear protection arrangement featuring a ceramic grinding disk with detachable segments, a clamping device with a metallic ring, and sealing elements to prevent material ingress and distribute forces evenly, allowing for effective sealing and easy replacement of worn parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear protection elements are attached to the container wall, then wear of the container is reduced, but the agitator components remain exposed to wear and contamination
Solution Approach 1:
The agitator is divided into modular components (agitator shaft, module bodies, grinding disks) that can be independently replaced. The grinding disk is segmented into multiple sections that can be individually exchanged when worn, allowing targeted maintenance without replacing the entire agitator assembly.
Solution Approach 2:
A protective ring is introduced as an intermediary component between the grinding disk and the container wall. This protective ring shields the grinding disk from direct contact with ground material and auxiliary grinding bodies, preventing contamination and excessive wear while allowing the grinding disk to perform its function.
2Reliability
If the agitator is replaced after a certain period, then wear is addressed, but considerable expense is incurred
Solution Approach 1:
The grinding disk is divided into multiple detachable sections that can be individually replaced when worn. This segmentation allows only the worn portions to be replaced rather than the entire grinding disk or agitator assembly, significantly reducing material waste and replacement costs.
Solution Approach 2:
The modular design enables selective replacement of only the worn grinding disk sections while retaining the unused portions. The protective ring and agitator shaft are recovered and reused, minimizing the amount of material that needs to be discarded and reducing overall replacement expenses.
3Ease of repair
If modular structure is used for the agitator, then ease of replacement is improved, but protection against material ingress and wear at contact points is insufficient
Solution Approach 1:
The protective ring serves as a mediator between the modular components (grinding disk, module bodies) and the harsh environment (ground material, auxiliary grinding bodies). It protects the contact points and gaps between modules from material ingress while maintaining the modular structure's ease of replacement.
Solution Approach 2:
The protective ring is made from wear-resistant material, creating a composite structure that combines the modular agility of the agitator components with the durability of the protective ring. This composite approach ensures both ease of replacement and effective protection against wear and contamination.
4Duration of action of stationary object
If the grinding disk is made of wear-resistant material, then durability is improved, but the complexity of the fastening system increases
Solution Approach 1:
The grinding disk is segmented into multiple detachable sections that can be individually replaced. Each section has its own fastening system, but the modular nature allows for standardized connection interfaces that simplify the overall fastening process compared to a monolithic structure of equivalent size and wear resistance requirements.
Solution Approach 2:
The grinding disk sections are made from wear-resistant material (such as ceramic or hardened steel) while the fastening system uses simpler, more easily manufactured components. The protective ring provides additional wear protection, allowing the fastening system to be optimized for ease of assembly rather than maximum strength, reducing overall complexity.
Data Source
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AI summary
A wear protection arrangement for a stirred mill, in particular a stirred ball mill (2) with an agitator (12) comprising a module body (20), is intended to enable effective wear protection of the entire modular agitator (12). According to the invention, the agitator (12) is provided at at least one end section with a module body (20) forming a grinding disc (30), and the module bodies (20) are axially clamped by means of a clamping device (32), wherein the clamping device (32) is provided with a protective body (38) as a cover, and sealing means (44) are assigned to the module bodies (20), the clamping device (32), and the protective body (38).