INDIAN RAILWAYS BOGIE PROTOTYPE THAT WILL RUN 200KMPH

 BOGIE PROTOTYPE THAT WILL RUN 200KMPH

In sync with Prime Minister Narendra Modi's 'Make in India' campaign, the Rail Coach Factory, Kapurthala, is contemplating to roll out the first rake of coaches which can run at a speed of 200km per hour. While its design has been prepared, RCF has already ordered a prototype of upgraded brake system, the most crucial component in this high speed train.

"If things go as planned, after getting the prototype of the new brake system, we shall prepare a prototype of the new coach by December. After the in-house testing, the first rake can be rolled out by the end of this financial year or in the beginning 2016-17 fiscal," said RCF general manager Alok Dave who is also holding the charge of RCF, Rae Bareli.

via - Times of India

prototype produced at RCF

The "conventional" fiat-sig bogie Air is being supplied supplied to 4 Axle Mounted Disc Brake cylinders. Applying the service brake charges the brake cylinder and presses the brake pads against the brake disc. Brake force is built up when the pads are applied. Venting the brake cylinder releases the service brake. The return spring in the brake cylinder moves the caliper levers to the release position.


For a train running at 200kmph the braking system and brake force becomes crucial. The brake system of the new prototype bogie has additional 4 new pneumatic cylinders with existing 4 brake cylinders.
These 4 pneumatic cylinders are mounted to the cross beam of the bogie frame and hence applying direct brake to the wheels.

The same pneumatic cylinder can be seen in the picture below with applied brakes to circumferential surface of the wheel. 

These special pneumatic cylinder like "axle mounted brake cylinder" are being imported from Germany.

Manufacturer being "knorr-bremse"

The air supply pipe for the same is same aluminium B.P pipe that supplies air to the axle brake cylinders. Hence connecting both the cylinders in series.

following are more closeups of the cylinder

              

Brake Pad material:

The pads of the brake are in direct contact to the wheels of the bogie and hence selection of the brake pad material is very important. Also the material should be such which do not causes defects on the wheels. 

The brake pad used in these prototype bogies are made up of Sintered  material.

These causes no harm to the wheels and hence maintaining the proper wheel profile.

Prototype Coaches :

There will be major changes in the high speed coaches. The new coaches would have automatic sliding doors on the sides, improved design of the vestibule area, which would end the externally visible gap between the coaches, LED TVs, WiFi and a better passenger information system.