Eccentric Torque-Measuring Shaft for High-Speed Contaminated Environments
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Solution Overview
Problem
Existing torque-measuring shafts are either complex in structure or not suitable for high-speed applications, particularly in environments with contaminants, where they fail to provide reliable measurements.
Innovation Solution
A torque-measuring shaft with material weakening in the radial direction, eccentric to the shaft axis, which simplifies the structure, reduces the need for additional sealing, and allows for effective contamination protection, while maintaining operational safety at high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional torque-measuring shafts are used in high-speed applications with contaminants, then measurement reliability deteriorates, but adding complex sealing structures increases device complexity
Solution Approach 1:
The harmful factor (contaminants) is excluded by removing the need for sealing structures entirely. The eccentric material weakening creates an internal reference system that is inherently protected from external contaminants, eliminating the requirement for complex sealing mechanisms while maintaining measurement reliability in high-speed applications
Solution Approach 2:
The eccentric material weakening acts as an intermediary reference system that mediates between the rotating measuring shaft and the stationary measurement system. This internal reference eliminates the need for direct contact or sealing interfaces with the external contaminant-laden environment
2Object-affected harmful factors
If multiple sealing structures are added to protect against contaminants, then contamination protection improves, but the structure becomes more complex and prone to failure
Solution Approach 1:
The design converts the potential harm of contaminants into a benefit by creating a measurement system that is inherently insensitive to external contamination. The eccentric material weakening creates internal stress patterns that can be measured reliably regardless of external contaminant presence, effectively using the robustness against contamination as a design feature rather than fighting it with seals
3Device complexity
If the measuring shaft structure is simplified, then device complexity reduces, but measurement precision may deteriorate
Solution Approach 1:
The material weakening is applied locally and eccentrically at specific positions on the measuring shaft, creating concentrated stress regions that enhance measurement sensitivity. This localized modification achieves high measurement precision without requiring complex overall structural design, maintaining simplicity while improving measurement capability
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 solution enables reliable and precise torque measurements even under rapid rotation and poor operating conditions, with reduced complexity and enhanced contamination protection, allowing for high-speed operation without external influences.
Implementation Method 1
measuring means disposed on the measuring shaft for measuring a torsion of the measuring shaft
Implementation Method 2
a material weakening disposed in radial direction inside the measuring shaft, eccentrically relative to the shaft axis
Data Source
AI summary
A torque-measuring shaft includes a measuring shaft disposed on a shaft axis of the torque-measuring shaft, loadable in torsion and having at least one rotationally symmetric surface region disposed coaxially with the shaft axis as well as a measuring device disposed on the measuring shaft for measuring a torsion of the measuring shaft, wherein the torque-measuring shaft has a material weakening disposed in radial direction inside the measuring shaft, eccentrically relative to the shaft axis.