Scraper Body Rolling Contact Friction Reduction
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Solution Overview
Problem
Scraper conveyors in coal mining face issues with wear and fatigue due to sliding friction and corrosion, leading to increased energy consumption, maintenance costs, and reduced service life, as well as quality issues with coal products from blocky material crushing.
Innovation Solution
The introduction of a scraper conveying device with a non-metallic elastomer supporting body and rolling bodies that transition friction from sliding to rolling contact, reducing wear and energy consumption, and allowing for longer maintenance cycles and improved coal quality through elastic buffering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If alloy steel scrapers are used, then strength and durability are improved, but weight and friction resistance increase
Solution Approach 1:
The scraper body is constructed from composite materials combining a metal skeleton with polymeric material coating, achieving both high strength and reduced weight compared to traditional alloy steel scrapers
Solution Approach 2:
The invention changes the material parameters by using polymeric coatings with specific hardness and elasticity properties, optimizing the balance between strength, weight, and friction characteristics
2Device complexity
If sliding friction contact is used between scraper and groove ledge, then structural simplicity is maintained, but wear and energy consumption increase
Solution Approach 1:
The invention replaces sliding friction mechanical contact with rolling friction contact by introducing rolling elements (such as steel balls or rollers) between the scraper and groove ledge, significantly reducing wear and energy consumption
Solution Approach 2:
The invention changes the friction mechanism parameter from sliding to rolling contact, fundamentally altering the wear characteristics and energy consumption of the scraper-groove interaction
3Reliability
If alloy steel scrapers are used, then wear resistance is improved, but energy consumption and manufacturing cost increase
Solution Approach 1:
The polymeric coating on the scraper body provides excellent wear resistance while being lighter than alloy steel, reducing the energy required to move the scraper along the groove
Solution Approach 2:
By replacing sliding friction with rolling friction through the introduction of rolling elements, the energy consumption is significantly reduced while maintaining or improving wear resistance
4Productivity
If heavy driving device is used to increase output power, then transportation capacity is improved, but weight and operating space increase
Solution Approach 1:
By replacing sliding friction with rolling friction in the scraper-groove interaction, the overall friction resistance of the system is reduced, allowing for a more compact and lighter driving device to achieve the same transportation capacity
Solution Approach 2:
The invention changes the friction parameter from high sliding friction to low rolling friction, reducing the power requirements and enabling a more compact driving device design
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
This solution significantly reduces friction resistance and wear, prolongs maintenance cycles, decreases energy consumption, and enhances coal quality by minimizing blocky coal crushing, while maintaining structural stability and reducing maintenance costs.
Implementation Method 1
The mounting surface is provided with a rolling body, and the rolling body is capable of supporting the scraper body when the scraper is located above the material conveying groove
Implementation Method 2
the supporting body is a nonmetallic elastomer
Data Source
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AI summary
The present invention provides a scraper. The scraper includes: a scraper body, having a bottom surface and a top surface opposite to the bottom surface; and a supporting body, formed on the bottom surface of the scraper body, wherein the supporting body is provided with a mounting surface and the mounting surface forms a part of the bottom surface; the mounting surface is provided with a rolling body, and the rolling body is able to support the scraping body when the scraper is located at a mounting position; and the supporting body is a nonmetallic elastomer. Meanwhile, the present invention provides material conveying equipment using the scraper, for example a scraper conveyor. By changing a contact and friction mode of the scraper and a conveying groove, the working state of the scraper and the whole load of the conveyor are improved, idle load is reduced, and the whole service life of the scraper and even the scraper conveyor is prolonged.