ME - 308 : PROJECT # 2
Design of a Speed Increasing Gear Train
Given Data
Power = 10 KW
Input speed ( n1 ) = 900 rpm
Gear Train Value ( n4 \ n1 ) = 9.375
STEP # 1 : Gear Design
Gear Train Value = =
=
=
= 9.375
--------------------------
( 1)
Center distance = ---------------------
(2 )
Select a module from table (13-3) in the textbook.
This is because, the minimum number for teeth required to avoid interference for gears having a pressure angle of 200 is 18.
If the condition is not satisfied, change m and recalculate the number of teeth on the gear # 1.
Check for the condition that N2>18
m/sec
N
mm
Mpa
Note: The contact stress on each of the gears will be equal.
MPa
Note: Use the maximum values of the stress and go to the respective figure ( Fig. 14-2 or Fig 14-3) in the text book and select the hardness number and then from the respective table (Tab 14-3 or Tab 14-4) select the material for the gears.