Pressure-Monitored Roller Structure for Crack Detection
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Solution Overview
Problem
Rollers used in heavy machinery, such as cranes and cable cars, experience wear and material fatigue leading to potential sudden failures due to cracks in weld seams and wear on pulleys, which are difficult to detect in time, posing safety risks.
Innovation Solution
A roller design that incorporates a valve with a gas pressure control device to monitor internal pressure, allowing for independent and reliable detection of cracks, using a valve integrated with a gas pressure control device and optionally a temperature and acceleration sensor to monitor wear and impending damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rollers are welded together to form a closed structure, then structural strength and integrity are improved, but crack detection becomes difficult due to the enclosed nature of weld seams
Solution Approach 1:
A gas-tight valve is introduced as an intermediary component to access the enclosed interior space of the roller. The valve allows introduction of inert gas and connection to pressure measurement devices, enabling indirect detection of cracks in weld seams through pressure changes without compromising the closed structural integrity of the roller body
2Productivity
If inspection intervals are extended to reduce maintenance time, then productivity is improved, but crack detection reliability deteriorates due to delayed detection
Solution Approach 1:
A pressure measurement device provides continuous or periodic feedback on the internal pressure of the roller. When pressure deviates from the reference value, it indicates a crack in the weld seams or roller body, enabling timely detection without extending inspection intervals. The system can trigger alerts or automatic shutdowns to prevent catastrophic failure
Solution Approach 2:
The roller system performs self-diagnosis through the integrated pressure monitoring system. The closed interior space with inert gas creates a self-contained monitoring system that automatically detects structural integrity issues without requiring external inspection personnel, enabling continuous health monitoring between maintenance cycles
3Reliability
If wear monitoring means are added to the roller, then reliability is improved, but device complexity increases due to additional components
Solution Approach 1:
The gas-tight valve serves multiple functions: it provides access for inert gas introduction, connects to pressure measurement devices, and acts as a sealed interface for the enclosed interior space. This multi-functional component enables wear monitoring without requiring separate access points or complex sensor installations, minimizing the increase in device complexity while maximizing reliability benefits
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
Enables early detection of cracks and wear, preventing sudden failures by sending alerts when pressure changes or other anomalies are detected, ensuring timely maintenance and reducing the risk of accidents.
Implementation Method 1
the gas pressure control device is provided on the valve. This configuration allows the use of only one component, namely the valve, which is provided in one piece with the gas pressure control device
Data Source
Figure 1
AI summary
The invention relates to a roller, consisting of a roller body (1) having a roller ring (2). The roller body (1) has at least two webs (5, 5') and, at the center point of the roller body, a hub (3). The webs (5, 5') form the region between the hub (3) and the roller ring (2). An interior (4) is formed between the webs. The roller body (1) has a valve (8), which interacts with a gas-pressure monitoring device.