Capped Bearing Vibration Sensor Nesting
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Solution Overview
Problem
Standard bearing designs with sensor packages attached to the outside exceed ISO dimensions, making them unsuitable for standardized use, and direct attachment of vibration sensors to bearing rings results in signal attenuation.
Innovation Solution
Integrating vibration sensors inside the cap of a bearing, which is attached to the ring via a brazed connection, with optional damping and protection, to maintain signal quality within critical ISO dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor packages are attached to the outside of bearing rings, then vibration detection capability is improved, but bearing dimensions exceed ISO standards
Solution Approach 1:
The sensor package is nested inside the cap structure, which itself is integrated into the bearing assembly. The cap serves as both a structural component closing the rolling chamber and as a mounting platform for the vibration sensor, eliminating the need for external sensor attachments and maintaining ISO dimension compliance.
Solution Approach 2:
The invention merges the cap's structural function with the sensor mounting function. The cap is designed to simultaneously close the rolling chamber and provide a mounting surface for the vibration sensor, combining multiple functions into a single integrated component that maintains standard bearing dimensions.
2Measurement precision
If vibration sensors are attached directly to bearing rings, then signal transmission is improved, but the bearing structure becomes more complex
Solution Approach 1:
The cap is designed as a multi-functional component that simultaneously serves as a structural element closing the rolling chamber and as a sensor mounting platform. This universal component eliminates the need for separate sensor attachment mechanisms, reducing overall structural complexity while maintaining vibration signal transmission quality.
3Measurement precision
If the cap is rigidly connected to the bearing ring, then vibration transmission to the sensor is improved, but the cap becomes more susceptible to eigenmode vibrations
Solution Approach 1:
The cap acts as an intermediary structure between the bearing ring and the vibration sensor. While providing rigid connection for effective vibration transmission, the cap's own structural properties and the sensor's mounting configuration help filter out cap eigenmode vibrations from the measurement signal.
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 bearing damage and machine faults while maintaining compactness and cost-efficiency, with improved signal-to-noise ratio and compliance with ISO dimensions.
Implementation Method 1
the cap is attached to the first ring by a material bonded connection, preferably by brazing. This rigid connection leads to a good transmission of vibrations
Implementation Method 2
at least one vibration sensor is attached on the inside of the cap
Data Source
AI summary
A bearing includes a first ring, a second ring, at least one row of rolling elements arranged in a rolling chamber disposed between the first ring and the second ring, and a cap attached to the first ring that is configured to close the rolling chamber. At least one vibration sensor is attached on the inside of the cap, and the vibration sensor is mounted in a metal block connected to the cap.