The figure shows an internal rim-type brake having an inside rim diameter of 300 mm and a dimension R 5 125 mm. The shoes have a face width of 40 mm and are both actuated by a force of 2.2 kN. The drum rotates clockwise. The mean coefficient of friction is 0.28. a. Find the maximum pressure and indicate the shoe on which it occurs. b. Estimate the braking torque effected by each shoe, and find the total braking torque. C. Estimate the resulting hinge-pin reactions. 30° 30° R 120° 120° Pin Pin 30° 30° Figure 3: An internal rim-type brake

The figure shows an internal rim-type brake having an inside rim diameter of 300 mm and a dimension R 5 125 mm. The shoes have a face width of 40 mm and are both actuated by a force of 2.2 kN. The drum rotates clockwise. The mean coefficient of friction is 0.28. a. Find the maximum pressure and indicate the shoe on which it occurs. b. Estimate the braking torque effected by each shoe, and find the total braking torque. C. Estimate the resulting hinge-pin reactions. 30° 30° R 120° 120° Pin Pin 30° 30° Figure 3: An internal rim-type brake

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.57P: The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a...

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

The figure shows an internal rim-type brake having an inside rim diameter of 300 mm and a
dimension R 5 125 mm. The shoes have a face width of 40 mm and are both actuated by a
force of 2.2 kN. The drum rotates clockwise. The mean coefficient of friction is 0.28.
a. Find the maximum pressure and indicate the shoe on which it occurs.
b. Estimate the braking torque effected by each shoe, and find the total braking torque.
c. Estimate the resulting hinge-pin reactions.
30°-
30°.
R
120°
120°
Pin
Pin
30°
30°
Figure 3: An internal rim-type brake

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