Presentation on fabrication and function of Fiat bogies used in worldwide Locomotive...:):)

1. PRESENTATION ON
FIAT BOGIE

2. BOGIE GENERAL
ARRANGEMENT

4. DESIGN FEATURES:

5. Principles of force
transmission
Vertical forces:
from the body to the
bogie frame through
the secondary
suspension springs;
from the bogie frame
to the axles through
the primary
suspension springs
and frame - axle
bearing control arm.

6. Lateral forces:
from the body to
the bogie frame
through the
secondary
suspension
springs; from the
bogie frame to the
axles through the
elastic elements of
the frame - axle
bearing control
arm.

7. Longitudinal traction
efforts and braking
powers:
from the body to
bogie frame through
the traction centre
rods and the traction
lever; from the bogie
frame to the axles
through the frame axle bearing control
arm.

8. Curve negotiation:
An articulated control arm is connecting axle
bearing and side frame through elastic
connection, which will provide flexibility
between axle and side frame.

9. Wheel diameter
New wheel dia 915mm
worn wheel dia 845mm

10. Suspension elements:
Primary suspension consists of nested inner
and outer springs, dampers, top rubber pad
secondary suspension consists of nested
flexi-coils springs (inner and outer
springs),rubber spring, vertical dampers,
lateral dampers, anti-roll bars, anchor links.
Secondary rubber pad is inserted below and
above secondary springs provides flexible
ends of springs.

11. Speed limit
Upto 160KMPH without any modification
upto 200KMPH with minor modification

12. FIAT BOGIE
SUB-SYSTEMS

13. Wheel and Axles
On the bogie each axle
is fitted with two brake
disks (4), diameter 640
mm and width 110 mm.
In built slack adjusting
facilities in brake cylinder
fitted.
Two wheel disc of tread
dia 915 (New), 845
(worn).

14. Axle bearings
A taper roller cartridge
type bearing is used.
It is a pre-assembled
unit not required any
further intervention,
such as clearance
adjustments.
The axle bearings on
the bogie are fitted
with sensors for
detecting speed

15. BOGIE FRAME
The bogie frame is a solid welded frame made by
steel sheets and forged or cast parts.
The frame is made up of two longitudinal
components connected by two cross-beams (2)
which also support the brake units.
The various supports which connect the different
bogie components are welded to the
frame.
The bogie frame rests on the primary suspension
spring units and supports the vehicle body by
means of a bolster beam. The bolster beam is
connected to the bogie frame by secondary
suspension.

16. BOGIE FRAME

17. Primary suspension
Consisting of two coil springs, one vertical
damper, An articulated control arm fitted with
twin-layer elastic joints connecting the axle
bearing to the bogie frame
for curve negotiation.

18. SECONDARY
SUSPENSION
CONSISTS
NEST OF FLEXI-COIL SPRINGS INNER AND
OUTER, RUBBER SPRING
VERTICAL DAMPERS
LATERAL DAMPERS
YAW DAMPERS
ANTI-ROLL BAR
ANCHOR LINKS

19. SECONDARY
SUSPENSION

20. DISC BRAKE SYSTEM
AXLE MOUNTED
DISC BRAKE
TWO DISCS PER
AXLE OF DIA640
INBUILT SLACK
ADJUSTER IN
BRAKE
CYLINDERS
35mm BRAKE