Crusher Wear Liner Interlocking Plates Prevent Dislodgement

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Solution Overview

Problem

Existing wear protection liners for gyratory crushers are prone to dislodgement when primary fixings fail, leading to significant damage and disruption as the plates fall into the crushing chamber.

Innovation Solution

A modular wear protection liner with interengaging formations, such as flanges and recessed portions, that interlock adjacent plates to prevent independent dislodgement and provide a secondary retention mechanism, ensuring the plates remain attached to the bottom shell even if primary fixings fail.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual wear resistant plates are secured to the bottom shell using primary fixings (bolts), then the plates are retained at the bottom shell, but the plates may be dislodged if the bolts fail

Engineering Contradiction:

Improveretention of liner platesVSAvoidmounting structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The liner is divided into multiple individual plates that can be independently replaced, while each plate incorporates interengaging formations (flanges and recesses) that segment the retention function between primary fixings and secondary mechanical interlocking

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The interengaging formations (flanges and recessed portions) are pre-configured on the plates during manufacturing, creating a built-in secondary retention mechanism that activates automatically if primary fixings fail, without requiring additional complex mounting structures

Inventive Principle:

Principle #10Preliminary action

2Ease of repair

If plates are designed as modular individual components, then ease of replacement is improved, but risk of dislodgement and damage increases

Engineering Contradiction:

Improvereplacement of wear platesVSAvoiddamage from dislodged plates

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The interengaging formations use a nesting mechanism where flanges on one plate fit into recessed portions of adjacent plates, creating a nested interlocking structure that prevents dislodgement while maintaining modular replaceability

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The interengaging formations act as intermediary mechanical elements between the individual plates and the bottom shell, providing a secondary retention function that mediates between the need for modular replacement and the risk of dislodgement

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If interengaging formations are added to prevent dislodgement, then reliability of plate retention is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveprevention of plate dislodgementVSAvoidproduction of liner plates

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The interengaging formations utilize simple geometric parameters (flange projections and recessed portions) that can be manufactured using standard metal forming and machining processes, minimizing the impact on manufacturing ease while achieving the reliability goal

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10179335B2Crusher wear resistant liner

Publication Date: 2019.01.15 SANDVIK INTELLECTUAL PROPERTY AB

AI summary

A crusher wear resistant liner for positioning at a crusher bottom shell includes a plurality of modular wear resistant plates mountable at an inside surface of the bottom shell and positioned side-by-side to surround and protect the bottom shell interior. To prevent independent dislodgement of each plate and liner, respective inter-engaging formations are provided at each plate to contact at least one adjacent plate of the assembly to arrest any unintentional downward movement in the event that the primary fixings become ineffective.