# While testing a wheat thresher at recommended throughout 80 Nm torque is recorded at 850 rpm at the main shaft of the threshing cylinder, which is operated by a 200-mm diameter pulley. The overload factor and unit mass of V-belt are 1.2 and 0.9 kg/m respectively. At condition of maximum power transfer the maximum tension in V-belt in N is __________

+1 vote
While testing a wheat thresher at recommended throughout 80 Nm torque is recorded at 850 rpm at the main shaft of the threshing cylinder, which is operated by a 200-mm diameter pulley. The overload factor and unit mass of V-belt are 1.2 and 0.9 kg/m respectively. At condition of maximum power transfer the maximum tension in V-belt in N is __________

(a) 813.86

(b) 613.86

(c) 413.86

(d) 213.86

My doubt stems from Mechanical Power Transmission topic in division Mechanical Power Transmission of Farm Machinery

by (243k points)
selected by

The correct choice is (d) 213.86

Easiest explanation: v=$\frac{πDN}{60}=\frac{π*0.2*850}{60}$=8.90 m/s

Tc = mv^2 = 0.9*(8.90)^2 = 71.289 N

Tmax = 3Tc = 3*71.289 N.

+1 vote
+1 vote
+1 vote
+1 vote
+1 vote
+1 vote