25-08-2017, 09:32 PM
Brakes and Dynamometers
Brakes and Dynamometers.pptx (Size: 1.19 MB / Downloads: 129)
SINGLE BLOCK OR SHOE BRAKE
A single block or shoe brake is shown below. It consists of a block or shoe which is pressed against the rim of a revolving brake wheel drum. The block is made of a softer material than the rim of the wheel. This type of a brake is commonly used on railway trains and tram cars. The friction between the block and the wheel causes a tangential braking force to act on the wheel, which retard the rotation of the wheel. The block is pressed against the wheel by a force applied to one end of a lever to which the block is rigidly fixed. The other end of the lever is pivoted on a fixed fulcrum O.