Hood and Spoon Inertial Flow Belt Conveyor Transfer …docs\Hood and Spoon Inertial Flow Belt...
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Transcript of Hood and Spoon Inertial Flow Belt Conveyor Transfer …docs\Hood and Spoon Inertial Flow Belt...
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Hood and Spoon Inertial Flow Belt Conveyor Transfer Systems
Robert ClarkeProfessional in TrainingMechanical EngineeringGreenside Colliery – Anglo Coal
22 August 2008
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Presentation Outline
• Background• What is a Transfer Chute• Problems Associated with Belt Transfers• The Hood and Spoon Design Philosophy• Computational Design Techniques• The Design Process• Conclusion
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Background
• Greenside Colliery U/G – Trunk Conveyors
A
B
C
G
H
F
F1
NW1
NW3
N1
NW2
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Background
• Opportunities for Improvements– Downtime– Maintenance– Labour Expense– Reduced Fines Generation– Dust Control Downtime
42%
Maintenance34%
Labour9%
Fines15%
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Background
The Hood and Spoon Transfer ChuteThe Hood and Spoon Transfer Chute
3.6m
2m
1m
0.6m
X
Y
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Background
• What is a Transfer Point?
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Background
• What is a Transfer Point?
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Ineffective Transfer Problems
• Blockage/ Plugging
• Spillage
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• Damage to Belt and Idlers
Ineffective Transfer Problems
• Dust and Degradation
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1. Load Material at Uniform Rate in Coherent Stream
2. Centre loading in Direction of Travel
3. Load at the Speed of the Receiving Belt
4. Load with Minimal Impact
The Hood and Spoon Design Philosophy
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The Hood and Spoon Design Philosophy
• Centre Loading
• No Tracking Problems
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The Hood and Spoon Design Philosophy
• Low Impact loading
• Dust Control
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The Hood and Spoon Design
• Hood– In the Trajectory
Path– Material Leaves with
Vertical Velocity• Spoon
– Loading Surface– In Direction of
Receiving Belt
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The Hood and Spoon Design
High Impact and Low Velocity are Avoided
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The Hood and Spoon Design
High Impact and Low Velocity are Avoided
Coherent Constant Speed Loading
Prevention of Spillage, Wear and Degradation
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The Hood and Spoon Design
• Spoon Carries Material Build Up• Static Friction Condition is Satisfied• Spoon Empties Under Overload Condition
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Design Techniques
• Discrete Element Modeling (D.E.M.)– Used to Solve Discontinuous
Engineering Problems– Eg. Flow of Bulk Solids– D.E.M. Models Dynamic Motion &
Mechanical Interactions– Describes Velocity, Position & Force– Single Bodies Communicate Through
Boundary Forces
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D.E.M.
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The Design Process
• Step 1 – CAD Drawing
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The Design Process
• Step 2 – Simulate initial Concept
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The Design Process
• Step 3 – Modify The Design
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The Design Process
• Step 4 – Final Simulation
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The Design Process
• Step 5 – Design the Settling Zone
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The Design Process
• Step 6 – Final Concept
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Conclusion
• We Need: – Production– Energy Consumption
• So We Use :– VSD– High Belt Speed
• Therefore We Must:– Implement Modern Design Techniques– & Innovative Concepts
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