Bearing Deflection Monitoring With Ring-Mounted Distance Sensing

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Solution Overview

Problem

Conventional large-diameter rolling bearings face challenges in monitoring deflections due to assembly surface geometry and bolt loading, leading to potential damage without effective monitoring solutions.

Innovation Solution

A bearing with a distance sensor mounted on one ring to measure radial displacements between concentric rings, connected to a control unit that calculates deflection by subtracting a predetermined value from the measured displacement, triggering an alarm if the deflection exceeds a threshold.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional bearing assembly procedures are used with high assembly surface geometry quality and bolt tensioning specifications, then bearing geometry can be maintained within specification, but there is no capability to monitor bearing deflection in real-time

Engineering Contradiction:

Improvebearing geometry maintenanceVSAvoiddeflection monitoring capability

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent replaces conventional mechanical deflection measurement methods with a magnetic field-based distance sensor system. The distance sensor uses magnetic field interaction to measure the radial distance between bearing rings, enabling non-contact, real-time deflection monitoring without mechanical contact or additional loading on the bearing components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the distance sensor and the bearing rings. The magnetic field serves as a mediator that transfers information about ring position and deflection to the sensor without requiring direct physical contact, thus enabling deflection monitoring while maintaining bearing geometry integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If distance sensor is mounted on the first ring to measure radial displacements, then real-time deflection monitoring is enabled, but device complexity increases

Engineering Contradiction:

Improvedeflection monitoring capabilityVSAvoidsensor and control unit integration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The distance sensor is designed with multi-functionality, serving both as a position measurement device and as a trigger for alarm conditions. The control unit integrates multiple functions including data processing, threshold comparison, and alarm generation, reducing the need for separate dedicated components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the distance sensor, control unit, and alarm system into an integrated monitoring assembly. The control unit combines data processing, deflection calculation, and alarm control functions in a single device, reducing overall system complexity compared to having separate independent components for each function.

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If alarm is triggered when deflection exceeds threshold, then severe damage is prevented, but loss of operational time occurs due to alarm interruptions

Engineering Contradiction:

Improvedamage preventionVSAvoidoperational interruption

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The system implements continuous feedback monitoring of bearing deflection through the distance sensor, with real-time comparison against predetermined thresholds. This enables immediate detection and alarm triggering when critical deflection levels are reached, providing feedback-based protection against overload conditions while allowing normal operation within safe parameters.

Inventive Principle:

Principle #23Feedback

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 real-time monitoring of bearing deflection, allowing detection of overload conditions and preventing severe damage by alerting when deflection exceeds a predetermined threshold.

Implementation Method 1

The distance sensor may be a proximity sensor, such as an inductive sensor, an ultrasonic sensor, or an optical sensor

Methodology Applied

Scientific EffectProximity sensing: Electromagnetic Induction

Data Source

PatentUS12595822B2Bearing with distance sensor and control unit

Publication Date: 2026.04.07 AB SKF SKF PATENT DEPARTMENT

AI summary

A bearing includes a first ring and a second ring capable of rotating concentrically relative to each other, and at least one distance sensor mounted on the first ring and facing a surface of the second ring to measure radial displacements between the first and second rings. The bearing further includes a control unit connected to the distance sensor and adapted to calculate the value of a deflection of the bearing by subtracting a predetermined value from the value of the relative radial displacement between the first and second rings detected by the distance sensor.