Drive Train Thermal Decoupling for Overheat Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive train systems fail to prevent component damage during critical operating states, such as thermal stress, even when overload couplings are triggered, as they rely solely on torque overload thresholds, potentially leading to failure before reaching the preset limit.
Innovation Solution
A drive train with a thermal overload safeguard that mechanically decouples the drive input and output elements above a critical temperature, using a thermal securing element that changes mechanical properties, such as strength or volume, to interrupt torque transmission and prevent damage from overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overload couplings are used to trigger decoupling at preset limit torque, then mechanical overload protection is achieved, but components can fail due to thermal stress before reaching the torque limit
Solution Approach 1:
The patent introduces a thermal overload safeguard that changes the operational state of the drive train based on temperature parameters. When temperature exceeds a critical threshold, the thermal safeguard decouples the drive input and output elements, preventing thermal damage to components. This adds temperature as a new control parameter alongside the existing torque parameter, resolving the contradiction by protecting against thermal stress while maintaining mechanical overload protection.
2Device complexity
If the drive train operates without thermal protection, then the structure remains simple, but components are weakened and damaged by overheating before torque overload occurs
Solution Approach 1:
The patent segments the protection function into two independent parts: a mechanical overload coupling that responds to torque limits and a thermal overload safeguard that responds to temperature limits. Each segment handles a specific type of overload, allowing the system to remain relatively simple while providing comprehensive protection. The thermal safeguard is added as a separate functional unit rather than complicating the existing mechanical coupling.
3Reliability
If thermal overload safeguard is added to prevent thermal damage, then component protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the thermal overload safeguard with the existing drive train structure by integrating it into the load flow path. The thermal safeguard is positioned to work in conjunction with the mechanical overload coupling, creating a unified protection system. This merging approach allows thermal protection to be added without creating entirely separate, complex subsystems, thereby limiting the increase in device complexity while maintaining improved reliability.
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
The thermal overload safeguard effectively protects the drive train from overheating and mechanical overload by ensuring components are not weakened before reaching the torque overload threshold, providing a cost-effective solution by allowing for simple and low-cost replacement of the securing element when triggered.
Implementation Method 1
the thermal overload safeguard is configured in such a manner that there is a connection between the drive input element and the drive output element below a critical temperature, and the drive input element and the drive output element are mutually mechanically decoupled above the critical temperature
Implementation Method 2
The critical temperature can correspond to an annealing temperature in the tempering process of a metal, or to a melting temperature of a plastics material
Data Source
AI summary
A drive train includes a drive element, an output element and a thermal overload safeguard. The thermal overload safeguard is configured in such a way that there is a connection between the drive element and the output element below a critical temperature, and the drive element and the output element are decoupled mechanically from one another above the critical temperature.