Elastic Bearing Scraper for Coal Mining Friction Reduction
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Solution Overview
Problem
The existing scraper conveyor in coal mining faces issues with wear and fatigue due to harsh working conditions, leading to reduced service life, increased energy consumption, and coal quality deterioration, primarily because of friction and corrosion, which limits its efficiency and economic viability.
Innovation Solution
A material conveying device with an annular chain and traveling units equipped with a belt-shaped elastic material bearing portion that reduces friction by allowing coal blocks to be borne rather than pushed, thereby minimizing wear and preventing coal gangue from entering the conveying groove, improving coal quality and reducing energy consumption.
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 adopts a composite structure combining alloy steel components with polyurethane wear-resistant layers. The alloy steel provides structural strength while the polyurethane layer reduces weight and friction, resolving the contradiction between strength requirements and weight/friction reduction needs.
2Duration of action of stationary object
If alloy steel scrapers are used, then durability is improved, but energy consumption increases
Solution Approach 1:
The polyurethane wear-resistant layer on the scraper reduces friction coefficient compared to pure alloy steel, lowering the driving force required while maintaining durability through the combined strength of alloy steel structure and wear-resistant polyurethane surface.
Solution Approach 2:
Changing the material parameter from pure alloy steel to composite material with polyurethane coating alters the friction characteristics, reducing the energy required for movement while preserving the service life through enhanced wear resistance.
3Productivity
If traditional scrapers are used, then conveying capacity is maintained, but wear and corrosion increase
Solution Approach 1:
The scraper combines alloy steel structural components with polyurethane wear-resistant coating, maintaining the mechanical strength needed for conveying capacity while the polyurethane layer provides superior resistance to wear and corrosion from coal gangue and environmental factors.
Solution Approach 2:
The polyurethane wear-resistant layer is applied specifically to the contact surfaces of the scraper that experience wear and corrosion, providing localized protection while maintaining the overall structural integrity and conveying capacity of the scraper body.
4Productivity
If scraper weight is increased, then conveying capacity is improved, but driving power requirements increase
Solution Approach 1:
The polyurethane coating reduces the overall weight of the scraper compared to solid alloy steel construction while maintaining sufficient strength for conveying capacity, thereby reducing the driving power required without sacrificing productivity.
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
The solution extends the service life of scraper conveyor components, enhances coal quality, and decreases energy consumption and maintenance needs, offering economic benefits and improved working conditions by reducing friction and wear.
Implementation Method 1
a belt-shaped elastic material bearing portion, connected to the top surfaces and/or the side surfaces of the two adjacent traveling units
Data Source
AI summary
The present invention provides a material conveying device including a material conveying groove, having a traveling track; a material bearing and conveying assembly, including: an annular chain; traveling units arranged on the chain at intervals, drivable by the chain to move on the traveling track along a material conveying direction, and provided with a bottom surface close to the material conveying groove, a top surface opposite the bottom surface and side surfaces extending between the top and bottom surfaces; a belt-shaped elastic material bearing portion, connected to the top surfaces and/or the side surfaces of the two adjacent traveling units; and a driving device to drive the chain to circularly rotate relative to the material conveying groove along the material conveying direction. The working state of material conveying equipment can be improved, and the stability and economic index of the equipment can be enhanced.