Machine Design - II (ME 308 Lab)
Shaft Design - Project # 1
Term 991
Steps # 1 & 2
N.m. | where: P is power in kW n is shaft speed in rpm |
where: P is power (kW) n _{t} is pitch line velocity = 3.37 m/sec. |
where: W_{t} is the transmitted load (N.) f is the pressure angle of the gears = 20° |
Resultant reaction is given by
N.
Use Eqn. (11-9)
Where:
F_{R} is the Catalog Load Rating
F_{D} is the Design Load*
L_{D} is the Design Life in Hours = 20000 Hrs.
n_{D} is the Design Speed (given in rpm)
L_{R}n_{R} is the Rated Life = 10^{6} rev.
R is the Reliability = 95%
a for Ball Bearings = 3
* for the values of F_{D}, use the values of the resultant reactions calculated for all 4 locations in step 5 of the lab-sheet
C=A.F. ´ F_{R}
Where:
A.F. is the Load-Application Factor - use table (11-6)
NOTE: