Chain Pin Wear Sensor for Precise Conveyor Chain Monitoring
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Solution Overview
Problem
Conventional drive chains in industrial plants face challenges in accurately detecting wear and predicting service life, leading to premature replacement and increased risk of failure due to friction and corrosion, with existing wear detection methods being inefficient and costly.
Innovation Solution
A drive chain design featuring a recess in the chain pin with a wear sensor arranged within, allowing for direct measurement of wear on the chain pin, combined with a hardened surface layer and a nanogenerator-powered signal unit for wireless communication, enabling precise monitoring and timely replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If chain length is used as an empirical value for replacement, then replacement decision is simple, but accuracy of wear detection is poor leading to premature replacement
Solution Approach 1:
The patent replaces mechanical measurement methods (chain length measurement) with an electrical/electronic sensing system. A sensor is integrated into the chain pin to directly detect wear of the hardened surface layer, converting mechanical wear into an electrical signal that can be processed and displayed, thereby achieving precise wear detection without complex mechanical measurements
Solution Approach 2:
The patent introduces a sensor as an intermediary element between the chain pin wear and the monitoring system. The sensor is embedded in the chain pin and directly contacts the hardened surface layer, acting as a mediator that translates physical wear into measurable electrical signals, enabling accurate wear detection while maintaining operational simplicity
2Measurement precision
If chain samples are removed for vibration tests, then wear assessment accuracy improves, but productivity and time consumption increase significantly
Solution Approach 1:
The patent implements preliminary action by pre-installing sensors into the chain pins during manufacturing. The sensors are positioned within the hardened surface layer before the chain enters service, enabling continuous wear monitoring without requiring subsequent sample removal or laboratory testing, thus maintaining productivity while achieving accurate wear assessment
Solution Approach 2:
The chain monitoring system performs self-service by using integrated sensors that continuously monitor wear conditions during operation. The system eliminates the need for external inspection activities such as sample removal and vibration testing, allowing the chain to monitor its own wear state in real-time without removing it from service
3Measurement precision
If sensor is integrated into chain pin, then wear detection precision improves, but device complexity increases
Solution Approach 1:
The patent applies the nesting principle by embedding the sensor within the chain pin structure. The sensor is positioned inside the chain pin and surrounded by the hardened surface layer, creating a nested configuration where the sensor is protected by the pin structure while the pin structure is enhanced by the sensor functionality, achieving precise wear detection with minimal structural complexity
Solution Approach 2:
The chain pin serves multiple functions: it provides mechanical connection between chain links, contains the hardened surface layer for wear resistance, and houses the wear sensor for monitoring. This multi-functionality reduces overall device complexity by combining several functions into a single component rather than requiring separate elements for each function
Data Source
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AI summary
The invention relates to a drive chain, in particular a conveyor chain for industrial systems, comprising a plurality of chain links, which are connected together via respective chain joints. A chain pin extends through a joint opening in the direction of a joint axis of the chain joint in order to form the chain joint. The conveyor chain also comprises a sensor for detecting chain wear. At least one chain pin of the drive chain has a recess, and the sensor for detecting chain wear is arranged in the recess. The invention additionally relates to a chain pin and to a method for detecting chain wear of such a drive chain.