Roller Scraper Openings for High-Temperature Wear Control
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Solution Overview
Problem
Existing scrapers for high-temperature environments, such as continuous heat-treatment furnaces, face challenges with reduced service life due to excessive wear and material limitations, leading to increased maintenance and reduced production efficiency.
Innovation Solution
A scraper design with a reduced weight and adjustable load by incorporating openings in the scraper main body, allowing for minimal necessary contact pressure to remove attached substances, thereby extending the scraper's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical scraper is installed in the high-temperature furnace, then attached substances can be scraped off the roller surface, but the scraper cannot withstand the high temperature and corrosive atmosphere, leading to reduced service life
Solution Approach 1:
The patent replaces the mechanical pressing mechanism with a gravity-based suspension system. The scraper main body hangs from a suspension member attached to the roller, allowing the scraper to contact the roller surface without requiring mechanical pressing components that cannot withstand high temperatures. The weight of the scraper itself provides the necessary contact pressure.
Solution Approach 2:
The patent changes the material parameters of the scraper components to withstand high-temperature and corrosive environments. The scraper main body is made of heat-resistant material, and the scraping claw is made of wear-resistant material suitable for high-temperature conditions, enabling the scraper to maintain its service life in the furnace environment.
2Reliability
If excessive load is applied between the scraper and roller, then attached substances can be effectively removed, but the scraping claw becomes worn quickly, reducing service life and requiring frequent maintenance
Solution Approach 1:
The scraper main body utilizes its own weight as the pressing force against the roller surface. This self-service mechanism eliminates the need for external mechanical pressing systems and allows easy adjustment of the contact load by changing the scraper's weight or adding counterweights, optimizing the balance between scraping effectiveness and wear reduction.
Solution Approach 2:
The patent applies wear-resistant material to the scraping claw to change its material properties, enabling it to withstand the contact load without excessive wear. The material selection and weight optimization allow the scraper to maintain effective contact pressure while extending service life through reduced wear.
3Force
If the scraper main body is made heavier to increase contact pressure, then scraping effectiveness improves, but the load on the roller increases excessively, causing roller surface damage
Solution Approach 1:
The scraper design concentrates the contact force locally at the scraping claw rather than distributing it over the entire scraper main body. This local quality approach allows effective scraping pressure at the contact point while keeping the overall scraper weight low, preventing excessive load on the roller surface.
Solution Approach 2:
The patent optimizes the weight and material properties of the scraping claw to achieve the right balance of contact pressure. The wear-resistant material and controlled weight ensure sufficient pressure for effective scraping while preventing excessive force that could damage the roller surface.
Data Source
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Figure 3(a)~3(b)
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AI summary
To provide a roller scraper capable of having a long service life. A roller scraper that removes attached substances on a surface of a roller, the roller scraper including a scraper main body that is supported on a floor portion and a scraping claw that is disposed in such a manner as to project in a width direction of the scraper main body. The scraping claw is placed against the roller in such a manner as to be in contact with the surface of the roller, and an opening is formed in the scraper main body.