Air-Permeable Bearing Protector for Dusty Conveyor Pulleys

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Solution Overview

Problem

Conveyor pulley bearings in dusty environments, such as ore mining and metallurgy, face damage from dust and particulate matter due to inadequate sealing, leading to reduced service life and operational issues.

Innovation Solution

A self-lubricating bearing protection system with an air-permeable ring and a bearing housing made from engineering plastics, featuring a keyed joint and anti-friction agents, which allows for improved sealing and reduced friction, thereby protecting the bearings from dust and particulate matter while allowing air passage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If traditional seals (labyrinth seals, lip seals, gaskets) are used to protect bearings from dust, then sealing protection is provided, but air flow due to thermal expansion and contraction sucks dust particles through the seal into the bearing

Engineering Contradiction:

Improvedust protectionVSAvoidsealing effectiveness

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent employs an air-permeable ring made of porous material that allows controlled air flow while blocking dust particles. The porous structure enables the seal to be permeable to air but impermeable to solid particulates, resolving the contradiction between allowing thermal expansion air flow and preventing dust ingress.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The bearing protection system uses composite construction combining a solid portion (housing) with an air-permeable ring (sealing element). This composite approach integrates structural support with selective permeability functionality, achieving both mechanical strength and dust-protection while allowing air flow.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If bearing protection components are added to prevent dust ingress, then sealing capability is improved, but device complexity and number of components increase

Engineering Contradiction:

Improvedust protectionVSAvoidnumber of components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the bearing protection function with the housing structure by integrating the air-permeable ring into the housing design. The housing and sealing element work as a unified assembly, reducing the need for separate protective components and simplifying the overall device structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The air-permeable ring serves multiple functions simultaneously: it acts as a seal, allows thermal expansion air flow, blocks dust particles, and provides structural support. This multi-functionality reduces the need for additional specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If conventional bearing seals are used, then some protection is provided, but friction and wear increase reducing service life

Engineering Contradiction:

Improveparticulate matter protectionVSAvoidbearing service life

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of stationary object

Solution Approach 1:

The patent replaces traditional mechanical contact seals with a porous material-based sealing system. This substitution eliminates or reduces friction and wear associated with contact seals, thereby extending bearing service life while maintaining protection against particulate matter.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 extends the service life of conveyor pulley bearings, reduces maintenance costs, and enhances operational reliability by effectively filtering out micro particles and reducing friction, thus preventing damage from dust and particulates.

Implementation Method 1

the air-permeable ring is composed of an air-permeable material configured to allow air passage between the distal side and the bearing-facing side

Methodology Applied

Scientific EffectPermeation: Permeation

Implementation Method 2

one or more of felt, wool, and synthetic nonwoven material and is impregnated with a lubricant configured to reduce friction between the axle and the bearing protection

Methodology Applied

Scientific EffectLubrication: Lubrication

Data Source

PatentUS10954071B1Bearing and bearing protector apparatus and methods

Publication Date: 2021.03.23 LEVADNYI IHOR

AI summary

Bearing and bearing protector with improved performance characteristics, reduced material use, lower cost of manufacturing and maintenance. Bearing protector includes air permeable element (e.g., wool, felt) that is configured to allow passage of air while preventing dust and other particulars from entering the bearing thereby improving bearing operation and longevity. Felt may be impregnated with a lubrication fluid to provide additional lubrication and protection. A self-lubricating bearing (SLB) is manufactured from an engineering plastic and is fitted with integrated bearing protector. The self-lubricating bearing includes one or more linear groves. When fitted onto an axle, the groves may receive excess plastic material that may occur during thermal expansion of the bearing during operation due to friction and heating. Plastic material may include an antifiction agent and the groves may be packed with consistent lubricant in order to reduce friction and improve performance.