30-09-2011, 01:14 AM
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30-09-2011, 01:14 AM
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30-09-2011, 09:34 AM
o get more information about the topic "vacuum braking system " please refer the link below
https://seminarproject.net/Thread-vacuum-braking-system https://seminarproject.net/Thread-vacuum...3#pid12313
11-01-2014, 04:14 PM
VACUUM BRAKING SYSTEM VACUUM BRAKING.pdf (Size: 500.88 KB / Downloads: 184) OVERVIEW OF VACUUM BRAKE History- The vacuum brake is a braking system employed on trains and introduced in the mid-1860s. . A variant, the automatic vacuum brake system, became almost universal in British train equipment and in those countries influenced by British practice. It was an alternative to the air brake, known as the vacuum brake. Like the air brake, the vacuum brake system is controlled through a brake pipe connecting a brake valve in the driver's cab with braking equipment on every vehicle. TWO PIPE SYSTEM The usual brake pipe operated in the conventional way but the second pipe was provided to give an additional supply to speed up the brake release. The second pipe is called the reservoir pipe. ADDITIONAL FEATURES OF THE VACUUM BRAKE ACCELERATORS The accelerator valve is fitted to each vehicle on the connection between the brake pipe and the brake cylinder. It detects the loss of vacuum when the pressure rises in the brake pipe and opens the pipe to atmosphere on the vehicle. This eventually helps to speed up the operation on each vehicle thereby reducing the vacuum more quickly on each vehicle and therefore increases the propagation rate along the brake pipe. LIMITATIONS the practical limit on the degree of vacuum attainable means that a very large brake piston and cylinder are required to generate the force necessary on the brake blocks. on a very long train, a considerable volume of air has to be admitted to the train pipe to make a full brake application, and a considerable volume has to be exhausted to release the brake. |
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