1. Bucket elevators Basic types Pitched bucket elevator
Continuous bucket elevator
Belt
Conveying material
Round steel chain
Chain
Central chain

2. Bucket elevators
Belt bucket elevators

3. Bucket elevators Chain bucket elevators Round steel chain
Central chain

4. Bucket elevators
Feeding methods
Scoop-feeded
Fly-feeded

5. Bucket elevators Discharge methods Pitched Continuous
Centrifugal discharge
Perfect discharge
Outside discharge
Inside discharge

6. Bucket elevators Discharge principle Inner radius COG radius
Outer radius
Pole distance

7. Bucket elevators Capacity calculation Force calculation Mass / meter
Sum. resistant coeff.
Mat. flow
Speed

8. Screw conveyors
Transported materials: material not sensitive to the crunching effect of the screw (ashes, chemicals, fertilizers, food products, meal, ores, paper pulp, salt, sand...)
Screw types

9. Screw conveyors
Flow direction types
Material in the trough

10. Screw conveyors Construction Parts: 1 Trough 2 Screw 3 End bearing
Section A-A
Parts:
1 Trough
2 Screw
3 End bearing
4 Head bearing
5 Hanging bearing
6 Drive motor
7 Coupling
8 Gear
10 Feed opening
11 Discharge opening
Pushed or pulled screw?

11. Screw conveyors Required power of a horizontal screw:
Capacity of a horizontal screw:
P = ρhIv(Lf±H) in W
ρh= Bulk density
Iv= Volumetric capacity
L= Horizontal distance of start and end points
H= Height difference of start and end points
f= General resistance factor (0,3 – 4,4)
Capacity in m3/h
Diameter of the screw in m
Screw pitch in m
Speed of screw in 1/min
Fill factor
φ=0, high-density, highly abrasive material
φ=0,25 high-density, lightly abrasive material
φ=0,32 low-density, lightly abrasive material
φ=0,4-0,5 low-density, non-abrasive material
k = factor for inclined screw
inclination
For ribbon screws:
Max. allowed screw speed exists!
k factor

12. Screw conveyors Vertical screws Minimal required speed of the screw
At critical speed
Above critical speed

13. Roller conveyors Transported material: Type of roller elements:
different unit loads, such as:
boxes
paletts
long steel or wood material
component assemblies
Type of roller elements:
- Rollers
- Wheels (skates)
- Balls
Classification of roller conveyors:
- Gravity roller conveyors
- Manual roller conveyors
- Powered roller conveyors

14. Gravity and manual roller conveyors
Fixed
Expandable v
vlimit
Accumulation of the
transported unit load t

15. Powered roller conveyors
Individually-driven rollers
Belt
straight modules only
transport rollers
tensioning rollers

16. Powered roller conveyors
Chain
Round belt
Lineshaft

17. Accessories for horizontal diversion
Pusher
Chain transfer
Sliding shoes
Turntable
Pop-up belt

18. Accessories for vertical diversion
Elevator
rope
belts
non-continuous
Paternoster
continuous

19. Accessories for vertical diversion
Vertical spiral
conveyor
Paternoster
with sorting
function