hood and spoon inertial flow belt conveyor transfer systems
TRANSCRIPT
Hood and Spoon Inertial Flow Belt Conveyor Transfer Systems
Robert ClarkeProfessional in TrainingMechanical EngineeringGreenside Colliery – Anglo Coal
22 August 2008
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
Background
• Greenside Colliery U/G – Trunk Conveyors
A
B
C
G
H
F
F1
NW1
NW3
N1
NW2
Background
• Opportunities for Improvements– Downtime– Maintenance– Labour Expense– Reduced Fines Generation– Dust Control Downtime
42%
Maintenance34%
Labour9%
Fines15%
Background
The Hood and Spoon Transfer ChuteThe Hood and Spoon Transfer Chute
3.6m
2m
1m
0.6m
X
Y
Background
• What is a Transfer Point?
Background
• What is a Transfer Point?
Ineffective Transfer Problems
• Blockage/ Plugging
• Spillage
• Damage to Belt and Idlers
Ineffective Transfer Problems
• Dust and Degradation
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
The Hood and Spoon Design Philosophy
• Centre Loading
• No Tracking Problems
The Hood and Spoon Design Philosophy
• Low Impact loading
• Dust Control
The Hood and Spoon Design
• Hood– In the Trajectory
Path– Material Leaves with
Vertical Velocity• Spoon
– Loading Surface– In Direction of
Receiving Belt
The Hood and Spoon Design
High Impact and Low Velocity are Avoided
The Hood and Spoon Design
High Impact and Low Velocity are Avoided
Coherent Constant Speed Loading
Prevention of Spillage, Wear and Degradation
The Hood and Spoon Design
• Spoon Carries Material Build Up• Static Friction Condition is Satisfied• Spoon Empties Under Overload Condition
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
D.E.M.
The Design Process
• Step 1 – CAD Drawing
The Design Process
• Step 2 – Simulate initial Concept
The Design Process
• Step 3 – Modify The Design
The Design Process
• Step 4 – Final Simulation
The Design Process
• Step 5 – Design the Settling Zone
The Design Process
• Step 6 – Final Concept
Conclusion
• We Need: – Production– Energy Consumption
• So We Use :– VSD– High Belt Speed
• Therefore We Must:– Implement Modern Design Techniques– & Innovative Concepts
????????QUESTIONS