Study On The Inner Axlebox Type Light Rail Bogies Design
In the various tracks of the existing traffic patterns, light rail, with its low cost, small footprint, traffic volume flexibility, is highly appreciated. At present, Shanghai light rail line has been built in Beijing, Wuhan and other cities are also actively preparing for the light rail line. Light rail transit will become an important mode of urban transportation systems, thus, light rail vehicle bogie design is also a growing concern.
1 light rail bogies structure characteristics and performance requirements for light-rail lines often snaking through the city center, affected by the restrictions of the city streets and buildings, their lines with a small curve, curve radius, so, compared with conventional bogies, applies to bogie LRT line should have its own structure and performance requirement:
(1) axle load is small, usually 11t~12.5T. In order to make full use of urban space, are mostly elevated light rail lines and light rail is a medium-capacity transport mode, vehicle sections smaller than the subway, shorter in length, the use of articulated form.
(2) the wheelbase is small, usually 1.8M~1.9m. A smaller wheelbase for ease with small radius curves, minimum curve radius of 25m light rail lines.
(3) high light requirements. Due to the bogie axle small bogie a limited amount of space, in order to maximize volume, requiring vehicles to light weight, the lightweight design of the bogie is one of the important links.
(4) the layout and compact structure. Due to the smaller wheelbase, especially for the bogie, and in the limited space motor, coupling, gear box and brake equipment.