Vacuum Braking System Ppt
Overview of Vacuum brake It was an alternative to the air brake, known as the vacuum brake. Note that some Scratch Pages are included at the end of the project document for you to capture any ideas, sketches, etc. Vacuum brakes were a big step forward in train safety.
The fall of the piston to the bottom of the brake cylinder causes the brake blocks to be released from the wheels. Visibility Others can see my Clipboard. In the simplest version of the brake, shown above, the brake cylinder is integral with the vacuum reservoir.
Sometimes two or more are provided. The vacuum brake was, for many years, used in place of the air brake as the standard, fail-safe, train brake used by railways. The ejector consists of a series of cones inside a tube.
The brake pipe is carried between adjacent vehicles through flexible hoses. It was also slow to release and requires additional equipment to speed up its operation. Since the engine was only idling if the train was stationary, the exhauster would only be running at slow speed.
The ball valve is needed to ensure that the vacuum in the vacuum reservoir is maintained at the required level, i. It is necessary to close the connection as soonas the brake pipe vacuum is reduced so that a difference in pressure is created between the upper and lower sides of the brake cylinder piston.
Vacuum Booster works with the vacuum from the. Successfully reported this slideshow.
The vacuum brake can very simply be partially released by restoring some but not all of the vacuum, without having to fully release the brakes. Find issues prior to being airborne.
This meant that the restoration of the vacuum in the brake pipe and cylinders along the train would be very slow. The sealed dummy couplings prevent the vacuum being lost from the brake pipe. This required them to restore much of the vacuum by the time the train was brought to a stand, allowing a quick release without having to run the large ejector for very long, msn messenger 9.0 for windows 7 thereby saving steam.
Often made of cast iron or some composition material, brake blocks are the main source of wear in the brake system and require regular inspection to see that they are changed when required. Other operators of vacuum brakes are narrow-gauge railways in Europe, the largest of which is the Rhaetian Railway.
If you find a presentation that is using one of your presentation without permission, contact us immidiately at. Normally the height of the mercury column found to be about millimetres of. On some locomotives, ejectors were combined with the driver's brake valve. Malaya Ranjan Sahoo at kmbb college of engineering and technology Nice presentation. Multiple robots and effect on task space.
WordPress Embed Customize Embed. Vacuum brakes permit the automatic application of brakes down the length of a train from a simple control in the driver's hand. You do not have the permission to view this presentation. The more sophisticated allowed a single brake application to apply the brakes on the train before they were applied on the locomotive. You can change your ad preferences anytime.
Presentation Description No description available. The Isle of Man Railway uses vacuum brakes fitted to all its coaching and wagon stock, as do the Ffestiniog and Welsh Highland Railways. At the same time, the air entering the underside of the brake cylinder creates an imbalance in the pressure compared with the pressure above the piston.
These are the counter current braking system, this is done by reversing the electric supply to the. 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. Conservative braking in winding drums. Pressurizes the system when. Parts of the Vacuum Brake System This diagram shows the principal parts of the vacuum brake system.
Introduction to Hydraulics. They are, of course, steam operated. It is much harder to block the hosepipe compared to air brakes.
In order to view it, please contact the author of the presentation. The basic hydraulic system, most commonly used, usually has six main stages.
Vacuum Braking System Seminar PPT Download -Mechanical Seminar Topics
These valves responded to a rise in train pipe pressure as the brake was applied, and admitted atmospheric air directly to the underside of the brake cylinder. With vacuum brakes, the end of the hose can be plugged into a stopper which seals the hose by suction. The piston is at the bottomof the brake cylinder, the brake cylinder is open at the top so that it is in direct connection with the vacuum reservoir. When the vacuum level in the brake pipe has fallen to the level set in the equalising reservoir, the air admission valve closes to maintain the brake pipe vacuum at that level.
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