Motor and Trailer Bogies for Heavy Metro Vehicles - Siemens

SF 2100
Motor and Trailer Bogies for Heavy Metro Vehicles
These SF 2100 motor and trailer bogies
are designed for use on electric, mass
rapid transit railcars, such as urban rail
vehicles and metro cars with 2 x 140 kW
up to 2 x 190 kW required power output
per car, maximum total weight of 64 t
and speeds up to 80 km/h.
Over 1900 of these standard,
serviceproven bogies are now in use in
Singapore, Shanghai and Guangzhou
and over 2200 modified bogies of this
type are used in vehicles for Hongkong.
The high reliability and availability of
this SF 2100 bogie is thanks to the
continued improvements, which have
been based on practical service
experience stemming back as far as
1975.
These motor and trailer bogies are of
modular design and the reduction in the
use of varied types results in
rationalization of manufacture.
Primary suspension is equipped with
pairs of service proven Chevron springs,
ensuring good self damping
characteristics and longitudinally and
laterally flexible axle guidance.
The secondary suspensions system is
equipped with air springs, offering both
optimum ride quality and the possibility
of level control in the secondary stage.
The bogie carbody connection is
achieved by low connected guiding rods
resulting in a low wheel load reduction.
Two separately ventilated, laterally
arranged three phase motors are used as
a traction system.
A single sided tread brake is used for
mechanical brake, offering advantages
with regard to costs and maintenance
requirements.
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