Roller Assembly Spacer for Screening Device Wear Reduction

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Solution Overview

Problem

The existing screening devices face issues with material wear and misalignment of discs due to rotation, leading to reduced lifespan and increased maintenance, as materials can get stuck between gaps and wear against the shaft and adjacent discs.

Innovation Solution

A roller assembly with a shaft, discs, and a spacing assembly that includes an inner spacer and an outer spacer made of elastically compressible material, which maintains disc spacing and absorbs shock, preventing wear and misalignment by limiting compression and providing a wear-resistant surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rigid spacing structures are used between discs, then disc spacing is maintained, but wear increases due to material getting stuck between gaps

Engineering Contradiction:

Improvedisc spacing maintenanceVSAvoidwear from material accumulation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies a flexible spacing structure consisting of an outer spacer made of elastically compressible material and an inner spacer. This flexible construction allows the spacing assembly to deform and prevent material from getting stuck between gaps, thereby reducing wear while maintaining disc spacing. The elastic material absorbs material accumulation without transmitting harmful forces to the discs.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The spacing assembly uses composite construction with an outer spacer made of elastically compressible material and an inner spacer providing structural support. This combination of materials allows the outer layer to flex and prevent material buildup while the inner structure maintains the required spacing, resolving the contradiction between spacing maintenance and wear prevention.

Inventive Principle:

Principle #40Composite materials

2Productivity

If discs rotate continuously to convey material, then screening function is performed, but discs move out of position and wear against adjacent discs

Engineering Contradiction:

Improvematerial conveying capabilityVSAvoiddisc spacing precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The flexible outer spacer made of elastically compressible material compensates for positional movements of the discs during rotation. It maintains consistent spacing between discs even when they move slightly out of position, preventing wear and ensuring continuous productive operation without sacrificing screening efficiency.

Inventive Principle:

Principle #30Flexible shells and thin films

3Stability of the object's composition

If rigid spacers are used to maintain disc spacing, then misalignment is prevented, but shock and wear increase

Engineering Contradiction:

Improvedisc spacing stabilityVSAvoidshock and wear

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The outer spacer made of elastically compressible material acts as a shock-absorbing element that maintains disc spacing stability while reducing the transmission of shocks and wear forces. The flexible material deforms under load and returns to its original shape, preventing damage while maintaining positional stability.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The elastically compressible outer spacer provides beforehand cushioning by absorbing shocks and impacts before they can reach the discs. This preemptive cushioning protects the discs from wear and damage while maintaining stable spacing, eliminating the need for rigid shock-transmitting structures.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 effectively reduces wear and extends the lifespan of the screening device by maintaining disc spacing and preventing misalignment, thereby decreasing maintenance costs and improving the device's operational efficiency.

Implementation Method 1

The outer spacer has a body defining an inner receiving space and a support element disposed in the inner receiving space. The body abuts against the discs and is formed of an elastically compressible material. The support element limits compression of the body along the width direction.

Methodology Applied

Scientific EffectElastic compression: Elasticity

Data Source

PatentUS11845109B1Roller assembly for a screening device

Publication Date: 2023.12.19 AGGREGATES EQUIP

AI summary

A roller assembly for a screening device includes a shaft extending along a width direction, a pair of discs disposed on the shaft, and a spacing assembly disposed on the shaft between the pair of discs. The spacing assembly includes an inner spacer disposed around the shaft and an outer spacer disposed around the inner spacer. The outer spacer has a body defining an inner receiving space and a support element disposed in the inner receiving space. The body abuts against the discs and is formed of an elastically compressible material. The support element limits compression of the body along the width direction.