Segmented Wear Lining for Mixing Vessels
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Solution Overview
Problem
Existing mixing devices with anti-wear linings suffer from excessive wear, particularly at attachment points, leading to frequent and costly replacements, and the process of replacing the wear cover is complex and time-consuming due to dimensional tolerances.
Innovation Solution
A multi-part anti-wear lining system is introduced, where the lining is divided into a main part and a wear element, with the wear element positioned closer to the container axis, allowing only the wear element to be replaced when worn, while the main part remains in service, and utilizing existing attachment points to minimize additional wear points and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wear protection plates are fastened using threaded bushings welded into circular recesses, then the wear protection plates can be securely attached to the container bottom, but the attachment points become vulnerable to abrasive wear from solid particles, leading to increased wear at these points
Solution Approach 1:
The wear protection plate is segmented into a main body portion and a separate circular reinforcement ring that surrounds the attachment points. This ring acts as a protective barrier, shielding the threaded bushings and recesses from direct contact with abrasive material, thereby preventing wear at the attachment points while maintaining secure fastening.
2Reliability
If the closure lid is pivoted into the discharge opening using a circular movement, then the discharge opening can be tightly closed with minimal gaps, but the wear cover becomes difficult to replace due to dimensional tolerances requiring time-consuming realignment
Solution Approach 1:
The closure lid is designed with a support arm that enables dynamic adjustment. The lid can be positioned at different angles and locations relative to the discharge opening, allowing operators to bypass dimensional tolerance issues during replacement while still achieving tight sealing when closed.
Solution Approach 2:
A support arm acts as an intermediary mechanism between the closure lid and the discharge opening. This support arm facilitates the pivoting motion and provides the necessary degrees of freedom to accommodate tolerances, making replacement easier while maintaining sealing effectiveness.
3Productivity
If floor cutters and mixing tools rotate at high speeds to maintain the container base free of material buildup, then mixing efficiency is improved, but the abrasion of the wear protection layer increases towards the center of the mixing container
Solution Approach 1:
The wear protection system applies different protective measures to different areas: the circular reinforcement ring provides enhanced protection at the attachment points and center area where abrasion is most severe, while the main body of the wear protection plate provides general protection. This localized quality matching addresses the non-uniform wear distribution caused by high-speed rotation.
Data Source
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AI summary
The present invention relates to a mixing device, comprising a vessel for receiving material for mixing, which can be rotated about a vessel axis and has a discharge opening (14) disposed in the base thereof, a mixing tool (2) disposed in the interior of the vessel, and a closure lid for closing the discharge opening, wherein the vessel base and/or the closure lid are provided with a wear-resistant lining on the side facing the interior of the vessel. In order to provide a mixing device having a wear-resistant lining which is less prone to wear, and in the event of wear can be replaced more easily and above all more cost-effectively, according to the invention the wear-resistant lining consists of a main lining part (31) and a wear element (28), wherein the wear element (28) is disposed closer to the vessel axis than the main lining part (31).