Slide 2 Tutorial: Engineering technology Topic: Drive shafts
Prepared by: Ing. Jaroslav Hbl Projekt Anglicky v odbornch
pedmtech, CZ.1.07/1.3.09/04.0002 je spolufinancovn Evropskm socilnm
fondem a sttnm rozpotem esk republiky. Slide 3 Drive shafts They
transmit loading by bending or torsion momentum. engine Connecting
shaft gearbox Operating machine En flow Input shaftCounter shaft
Output shaft Slide 4 Mobile shafts There are made two types of
tension shaft stressing by torsion and by bending at the same time.
Slide 5 Example of drive shaft design Slide 6 DRIVE SHAFTS -
CALCULATION Due to and are perpendicular to one another, it is not
possible to add their values together. We calculate vector sum of
these tensions but because of the reason of lower material
durability to torsion than to bending, this vector sum is modified
so that torsion has a higher influence to final tension than to
bending. Final tension is called reduced tension: Correction
factor: Vpoet prmru hdele: Reduced moment: Calculation of shaft
diameter Slide 7 Drive shafts - calculation Calculated shaft
diameter always means core diameter, non- reduced by constructional
detail : Shaft core with key seat d = calculated diameter D =
offered diameter Slide 8 DRIVE SHAFTS - MATERIALS Due to higher
straining, shafts are made of wrought steel. Simpler, less strained
shafts, are made of construction carbon steels of the class 11
(e.g. 11 500, 11 600, 11 700) or the class 12. More stressed shafts
are made of alloyed steels (mostly the class 14, 15 and 16). Due to
the requirement of higher shaft strength and resistance of shaft
surface against shaft wearing, they are often heat conditioned.
Cementation (for low carbon steels), quenching and heat treatment
(for high carbon steel). Slide 9 Stroje a zazen I, J. Doleek, P.
Gajdo, V. Novk Strojnictv I, J. Doleek, Z. Holoubek Strojnictv II,
J. Doleek, Z. Holoubek Modern strojrenstv, Josef Dilinger a
kolektiv Slide 10 How are mobile shafts stressed? Write down at
least 3 examples of drive shaft usage. What materials are used for
shafts production?