Bearing Fastening Ring With Integrated Sealing and Grease Distribution

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Solution Overview

Problem

Existing solutions for sealing and lubrication of bearings in rotating electric machines are inadequate, as they require additional caps and do not ensure uniform grease distribution, leading to potential water and dust ingress and bearing overheating.

Innovation Solution

A rolling bearing fastening ring with an annular body design, featuring through-holes for fixing, annular channels for sealing, and lubricant inlet and outlet perforations for independent lubricant supply, which prevents polluting agent ingress and ensures uniform lubrication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional caps are used for sealing bearings, then sealing performance is improved, but device complexity increases

Engineering Contradiction:

Improvesealing performanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the sealing function into the fastening ring itself by incorporating an annular sealing channel directly in the ring structure. This integrates two previously separate functions (fastening and sealing) into a single component, eliminating the need for additional caps while maintaining effective sealing performance against water and dust ingress.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If grease is introduced under pressure into the motor cap, then lubrication is achieved, but grease accumulates close to the rolling bearings causing overheating

Engineering Contradiction:

Improvelubrication adequacyVSAvoidbearing temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent implements localized grease distribution through strategically positioned grease inlet and outlet perforations in the fastening ring. The annular sealing channel creates a controlled grease flow path that directs lubricant precisely where needed along the bearing raceway, preventing excessive grease accumulation near the rolling bearings while ensuring adequate lubrication coverage.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If a simple fastening ring design is used, then manufacturing is simplified, but sealing and lubrication functions are inadequate

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidsealing and lubrication performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The fastening ring is designed as a multi-functional component that simultaneously performs fastening, sealing, and lubrication distribution functions. The annular sealing channel and integrated perforations enable the ring to seal against contaminants and distribute grease without requiring separate dedicated components, thus maintaining manufacturing simplicity while achieving comprehensive sealing and lubrication performance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP4542069A1Rolling bearing fastening ring for rotating electric machines and rotating electric machine

Publication Date: 2025.04.23 WEG EQUIP ELETRICOS SA

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AI summary

The present invention relates to a rolling bearing fastening ring (100) for rotating electric machines, which comprises an intermediate lubrication chamber (124) and a rolling bearing lubrication chamber (143), wherein both chambers are fluidly separated and independent of each other. The present invention further relates to a rotating electric machine.