Rolling Bearing Sensor Unit for Slippage Detection
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Solution Overview
Problem
Existing rolling bearings lack efficient methods for measuring the position of a rolling body's center point and detecting slippage during operation, which affects load distribution and maintenance needs.
Innovation Solution
Incorporating a sensor unit with acceleration sensors along axial and radial directions to measure the rolling body's position and slippage relative to the bearing rings, allowing precise detection of the center point and identifying potential maintenance requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no sensor unit is installed, then the rolling bearing operates without additional components, but the position of the rolling body's center point and slippage cannot be measured
Solution Approach 1:
The sensor unit is integrated into the rolling body itself, with the acceleration sensor positioned at the center of gravity. This nesting approach allows the measurement function to be embedded within the existing rolling body structure, adding measurement capability without significantly increasing overall device complexity
Solution Approach 2:
The rolling body's own center of gravity serves as the measurement reference point. By placing the acceleration sensor at the center of gravity, the system uses the rolling body's inherent physical properties for measurement, eliminating the need for external reference systems or additional complex positioning mechanisms
2Loss of information
If acceleration sensors are added to measure position and slippage, then measurement capability is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The acceleration sensor serves multiple functions simultaneously: it measures the position of the center of gravity, detects slippage between the rolling body and bearing rings, and monitors the operational state of the rolling bearing. This multi-functionality reduces the need for separate sensors for each measurement task, simplifying manufacturing
Solution Approach 2:
The invention replaces complex mechanical measurement systems with electronic acceleration sensors. Instead of using mechanical linkages, gears, or optical systems to measure position and slippage, the patent uses electronic sensors that convert mechanical acceleration into electrical signals, simplifying the manufacturing process and reducing mechanical complexity
3Reliability
If the sensor unit measures position and slippage accurately, then maintenance timing can be optimized, but the system requires more complex data processing
Solution Approach 1:
The acceleration sensor provides continuous feedback on the rolling body's position and motion state. By monitoring the acceleration signals over time, the system can detect changes in slippage patterns and position deviations, providing feedback that indicates when maintenance is needed without requiring complex predictive algorithms
Solution Approach 2:
The measurement system uses the rolling body's own operational characteristics (acceleration, position, slippage) as indicators of its health state. By monitoring these inherent parameters, the system can predict maintenance needs based on actual usage conditions rather than requiring complex external diagnostic systems
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
This solution enables high-efficiency operation by accurately determining the rolling body's position and detecting slippage, facilitating timely maintenance and optimizing load distribution in rolling bearings used in machines like wind turbines and mining equipment.
Implementation Method 1
The sensor unit preferably has at least one acceleration sensor. The acceleration sensor is intended to measure accelerations along an axial direction of the rolling body
Implementation Method 2
The sensor unit is advantageously intended to sense slippage of the rolling element during the operating process. A 'slip' of the rolling element is to be understood in particular as a movement of the rolling element relative to a bearing ring of the rolling bearing
Data Source
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AI summary
The invention relates to a rolling element for a roller bearing having a sensor unit. The invention states that the sensor unit (12; 12b) is provided for measuring a position of a centre point (22; 22b) of the rolling element in an inertial system during at least one operating step.