Scraper Chain Conveyor Scraper Groove Design for Wear Reduction
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Solution Overview
Problem
Existing scrapers for high-performance scraper chain conveyors face issues with wear and reliability due to the forces encountered, especially when using link chains with oval ring eyelet members and round chain fronts, which are not suitable for withstanding large forces and result in high wear and limited lifetime.
Innovation Solution
The scraper design features grooves on the inside of the scraper wings that extend up to the head web, forming receivers for entrainment projections on the horizontal chain links, ensuring even and low-wear movement, and a scraper-securing element that fixes the scraper to the chain links via a positive fit, using a fixing screw and nut for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a securing strap running between scraper wings is used to clamp horizontal chain links, then the scraper can be fixed to the chain links, but the design is not suitable for withstanding large forces and results in high wear
Solution Approach 1:
The scraper body is divided into separate scraper wings that can be independently positioned and secured to chain links, allowing each wing to independently bear and distribute mechanical loads, thereby increasing overall strength and reducing wear on individual components
Solution Approach 2:
Grooves are provided locally on the inner sides of the scraper wings to receive and secure the chain links, concentrating the securing function at specific locations where it is most needed, while maintaining overall structural integrity for withstanding large forces
2Ease of manufacture
If oval ring eyelet members with round chain fronts are used in link chains, then the chain links can be easily manufactured, but they are not suitable for withstanding large forces and result in high wear
Solution Approach 1:
The geometry of the chain link engagement surfaces is changed from round to grooved configurations, modifying the contact parameters between the scraper and chain links to better distribute mechanical stresses and withstand large forces while maintaining manufacturability
3Reliability
If grooves extending over limb bed height are provided in scraper wings, then positive-locking closure is achieved reducing wear, but the device complexity increases
Solution Approach 1:
The grooves serving as receivers for chain links are merged with the limb bed structure, combining two functional elements into a single integrated component that achieves positive-locking closure without adding separate wear-resistant elements, thereby reducing overall device complexity
Data Source
AI summary
The invention relates to scrapers for link chains of in particular double center scraper chain conveyors, comprising a one-part scraper body with a head web connecting two lateral scraper wings and at least one insertion pocket for insertion of a horizontal chain link of the link chain and securing scraper by means of a detachable scraper-securing element. In order to improve the entrainment of scrapers connected to the horizontal chain links and to be able to use the scrapers even with novel link chains, grooves extend in insides of scraper wings and outsides of an intermediate web over the height of limb beds up to head web and form receivers for entrainment projections on the outer surfaces of limbs of horizontal chain links. The invention also relates to scraper-securing element.