Motor and Trailer Bogies for Heavy Metro Vehicles - Siemens

SF 5000 UK TDG and SF 5000 UK LDG
Motor Bogie and Trailer Bogie for EMU and DEMU
The bogie SF 5000 UK is part of the
bogie family SF 5000 and was
developed especially for service on the
UK infrastructure.
The bogie family SF 5000 was developed
according to the requirements of
modern Multiple Units for a service
speed of up to 200 km/h.
The bogie family consists of two axle
bogies with a two-stage suspension
system and an air spring as secondary
suspension.
Due to the modular design of the bogie
family the following configurations are
possible:
Drive End- Jakobs
bogie bogie
Electric drive X X
Diesel Single drive X
Diesel Double drive X
Trailer bogie X X
The use of improved and optimised
components of tried and tested bogies
has led to the creation of a high
performance bogie family which ensures
high reliability, easy maintenance, low
service costs, high flexibility and
excellent riding comfort.
The bogies SF 5000 UK - TDG and LDG
with an axle distance of 2600 mm are
used especially on UK market for Express
and Commuter.
The axle guidance is carried out through
one elastic bush per axlebox, which joins
the radial arm with the frame. The
primary springs are located above the
wheelset bearings and consist of steel
coil springs and rubber elements for
acoustical and electrical isolation.
All longitudinal forces between bogie
and carbody are transmitted via a
traction centre and traction rods in
combination with a centre pivot. The
secondary suspension system consists of
air spring bags and a pneumatic 2-point
levelling valve system.
An anti-roll bar allows the static setting
of the carbody in terms of roll and also
reduces the dynamic tilting of the
carbody in curves and through switches.
The carbody is supported on the
secondary suspension by a bolster, also
serving as additional air reservoir. Two
anti yaw dampers per bogie can be
provided to improve the stability of the
vehicles.
In the case of motor bogies the traction
torque is transmitted from the motor to
the wheels by a partially suspended
helical toothed spur gear box and a
flexible toothed coupling.
The traction motor is directly mounted
on the bogie frame by the use of rubber
elements for acoustical isolation. By
separation of the coupling the wheelset
with the gear unit can be exchanged
without dismounting the motor.
For mechanical braking lowmaintenance
wheel mounted disk
brakes are used.
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