# How Will Science and Technology Change Our Lives in the Future and What Should India Do to Stay Ahead in the Game

Topics: Pulley, Belt, Line shaft Pages: 4 (460 words) Published: February 4, 2013
EXPERIMENT NO. 4
AIM- Design of V-belt drive
PROBLEM-
Design a V-belt drive for the following data Driving motor power = 20 kw
Driving motor speed = 1440 rpm
Driven reciprocated compressor speed = 480 mm
Suggest a suitable size and no. of belt required and draw a neat sketch of pulley group no. of fatigue cycle. The centre distance must not exceed 2m. SOLUTION- Given data-
Motor power PR = 20 kw
N motor = 1440 rpm=N2
N compressor = 480 rpm =N3
Step1- Design power
Pd = PR × kl T− XV −9
= 23 kw kl = 1.15
Step2- power rating per belt
From T−XV−9
Power/Belt = (FW−FC)eμθ/sin(α/2)-1eμθ/sin(α2)×Vp
From T−XV−8
Recommended belt cross section is ‘C’
For Designation ‘C’
Minimum pulley diameter
D2 = 225mm
Diameter of larger pulley
N1N2= D2D1
D1 = N1N2×D2
= 1440480×225
D1 = 675 mm
Peripheral velocity
VP = π×D2N2...