Question

A double short shoe drum brake
is present. Where = 12, bree8
2= 6 in and
theta = 25 degree
Find the torque capacity + actuating
delermine the value of
that will make it self-locking.
Determine the effect of each shoe separat se
and superpose them.
width = Zinches, Pmax = 0.2ks
force. Also
C
Assume
and fo.ad​

Answer 1

Explanation:

Figure shows a double short-shoe drum brake. Find its torque capacity and required actuating force for a = 12, b = 8, e = 3, r = 6 in, and θ = 25°. What value of c will make it self-locking? Assume pmax = 200 psi, width = 2 in, and μ = 0.28. Hint: Calculate the effects of each shoe separately and superpose them.

Figure Geometry for a Double Short-Shoe External Drum Brake