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A conveyor pulley is a mechanical device used to change the direction of the belt in a conveyor system, to drive the belt, and to tension the belt.
Modern pulleys are made of rolled shells with flexible end disks and locking assemblies.
Early pulley engineering was developed by Josef Sitzwohl [1] in Australia in 1948 and later by Helmuth Lange [2] and Walter Schmoltzi [3] in Germany.
Pulleys are made up of several components including the shell, end disk, hub, shaft and locking assembly. The end disk and hub may be on piece. The locking assembly may also be replaced with a hub and bushing on lower tension pulleys. The shell is also referred to as the rim in some parts of the world.
The pulley shaft is typically sized following CEMA [1] B105.1 in the Americas or AS 1403 in Australia.
1. Pulley Maven, Software for Designing and Analyzing Conveyor Pulleys
2. Conveyor Soft, Pulley Design Program,
Pulley Manufactures in Germany (DDR) in 1962 included Zemag, Lauchhammer, and Köthen.[4]
1. Josef Sitzwohl, 1948 Welded Conveyor Pulleys
2. Helmut Lange, 1963 Hannover University Ph.D. Thesis First to formalize the Fourier series expansion for the triaxial state of stress for pulley shells and connected end disks.
3. Walter Schmoltzi, 1974 a disciple of Lange - help understand the locking device contact stress field and connection between end disk and shell. SCHMOLTZI, W, "Designing Drums with transverse Shafts for Belt Conveyors". Thesis for Doctorate in Engineering, Hannover, 1974.
4. Von Jonnes Bahr, 1962, Neue Probleme der Bantechnik, Freiberger Forschungs-Hefte A 207, Akademie-Verlag, Berlin, S. 55-72.
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