Rotary Screen Anti-Clogging Sleeve Design

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Solution Overview

Problem

Disc screens used for solid residue separation are prone to clogging due to twisting of filiform elements, leading to frequent machine stoppages and high maintenance costs.

Innovation Solution

The screen incorporates anti-clogging sleeves with a stabilizing body that allows radial and axial movement, preventing twisting of filiform elements and facilitating easy removal, by using eccentric tubular bodies filled with self-expanding material to create a stable anti-clogging mechanism between screening discs and rotary shafts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If disc screens are used for solid residue separation, then screening function is achieved, but clogging occurs due to twisting of filiform elements

Engineering Contradiction:

Improvescreening operation continuityVSAvoidclogging by filiform elements

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces anti-clogging sleeves as intermediary elements between the rotary shafts and discs. These sleeves act as mediators that prevent filiform elements from directly contacting and twisting around the shafts and discs, thereby eliminating the clogging problem while maintaining the screening function

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the anti-clogging protection function into multiple independent sleeves, each positioned between specific shaft-disc assemblies. This segmentation allows each sleeve to independently handle clogging prevention for its specific location, improving overall system reliability

Inventive Principle:

Principle #1Segmentation

2Productivity

If frequent cleaning operations are performed to remove clogging, then machine stoppages are reduced, but operating costs increase

Engineering Contradiction:

Improvescreening operation continuityVSAvoidmaintenance cost

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The anti-clogging sleeves are installed in advance as preventive measures. They proactively prevent filiform elements from twisting and clogging the mechanism before clogging can occur, eliminating the need for frequent cleaning operations and reducing maintenance costs

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If discs are coupled with shafts through elastic spacer sleeves, then discs can bend and deviate, but foreign matter gets stuck between discs

Engineering Contradiction:

Improvedisc flexibilityVSAvoidforeign matter accumulation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The anti-clogging sleeves serve as intermediary elements that prevent foreign matter from getting stuck between the discs and shafts. They maintain the necessary flexibility for disc operation while blocking the accumulation of filiform elements in the interspaces

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8627962B2Screen for separating solid materials

Publication Date: 2014.01.14 ECOSTAR

AI summary

The invention is a screen (1) for separating solid residues, comprising: a plurality of parallel rotary shafts (2) spaced from each other and associated with a supporting structure (3); drive means (4, 4a) of the shafts (2) suited to set them rotating around their longitudinal axis (Y); a plurality of screening discs (8) arranged spaced from each other along the rotary shafts (2) to which they are fixed through connection means (9); a plurality of anti-clogging sleeves (10; 20) coupled externally to the rotary shafts (2) and each included between two corresponding screening discs (8). A stabilizing body (11, 21) is arranged peripherally inside each one of the anti-clogging sleeves (10, 20).