Transverse structural member of bogie frame usually two off which also supports the carbody guidance parts and the traction motors. An air brake cylinder is provided for each wheel. A cylinder can operate tread or disc brakes. Some designs incorporate parking brakes as well. Some bogies have two brake cylinders per wheel for heavy duty braking requirements.
Each wheel is provided with a brake disc on each side and a brake pad actuated by the brake cylinder. A pair of pads is hung from the bogie frame and activated by links attached to the piston in the brake cylinder. When air is admitted into the brake cylinder, the internal piston moves these links and causes the brake pads to press against the discs. A brake hanger support bracket carries the brake hanger s, from which the pads are hung. A steel coil spring, two of which are fitted to each axlebox in this design.
They carry the weight of the bogie frame and anything attached to it. Many motors are suspended between the transverse member of the bogie frame called the transom and the axle.
This motor is called "nose suspended" because it is hung between the suspension tube and a single mounting on the bogie transom called the nose. Figure 6: Drawing of a nose suspended traction motor.
The motor weight is distributed between the transom of the bogie and the axle. The axle carries the weight of the motor through a suspension tube. Drawing: Voith. Figure 7: A more modern design is the frame mounted motor. The weight of the motor is carried entirely by the bogie frame. The axle is driven through a flexible coupling. This arrangement reduces the unsprung weight on the wheels and therefore reduces wear. This contains the pinion and gearwheel which connects the drive from the armature to the axle.
Allows the bogie to be lifted by a crane without the need to tie chains or ropes around the frame. Normally, each axle has its own motor. It drives the axle through the gearbox. Some designs, particularly on tramcars, use a motor to drive two axles.
In the UK, the overhead line is divided into sections with short neutral sections separating them. It is necessary to switch off the current on the train while the neutral section is crossed.
A magnetic device mounted on the track marks the start and finish of the neutral section. The device is detected by a box mounted on the leading bogie of the train to inform the equipment when to switch off and on.
Rubber air suspension bags are provided as the secondary suspension system for most modern trains. The air is supplied from the train's compressed air system. These are connected by means of a cable attached to the WSP box cover on the axle end. The motor circuits are connected to the traction equipment in the car or locomotive by flexible leads shown here.
Simple protection for the return current brush, if fitted, and the axle bearing lubrication. Bogie Designs. There are a number of different designs for bogies as shown in the following illustrations. Let's reshape it today. Corning Gorilla Glass TougherTogether. ET India Inc. ET Engage. ET Secure IT. Auto Auto News. Auto Components. Products Durables. Energy Power. Services Advertising. Rate Story. Font Size Abc Small.
Abc Medium. Abc Large. NEW DELHI: Faced with the ever-increasing passenger rush, Railways have decided to increase the permissible limit of coaches in express trains from 24 to 26 to create additional berths. In order the train to fit in this loop line, the train length should not exceed meters. An average coach length will be around 25 meters, hence in meters 24 coaches and an engine can be accommodated comfortably. Hence passenger trains can have maximum 24 coaches. It varies from 12 to 24 coaches based on the route and train type.
When it comes to goods train, even it should not exceed the loop line length for the same reasons.
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