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CEMA Universal Method

Details of the method are presented in BELT CONVEYORS FOR BULK MATERIALS, 7th Edition, Conveyor Equipment Manufacturers Association, 2014

Drag Classifications

Te= Energy + Main(Load, Tension) + Point Resistances

 

•Energy

–ΔTHn       = Lift or lower the material and belt

–ΔTamn     = Continuously accelerate material to belt speed

 

•Main (Rolling, Primary)

–Load Independent

»ΔTssn    = Belt sliding on skirtboard seal

»ΔTisn     = Idler seal friction

–Load Dependent

»ΔTiWn    = Idler load friction

»ΔTbin     = Visco-elastic indentation of belt

»ΔTimn    = Idler misalignment

»ΔTsbn    = Slider Beds

»ΔTsn      = Bulk materials sliding on skirtboards.

–Load and Tension Dependent

»ΔTmzn    = Bulk materials trampling

 

• Point 

–ΔTpxn    = Belt bending on the pulley

–ΔTprn     = Pulley bearings

–ΔTbcn    = Belt cleaners and plows

–ΔTdpn    = Discharge plow

 

 

See also: Calculations,