Bogie under frame

BOGIE FRAME
 Y-FRAME

-STEEL SHEETS(St-52)
 TWO SIDE FRAMES CONNECTED BY TWO CROSS BEAMS
-SUPPORT BRAKE UNITS.
 BOGIE FRAME ON THE PRIMARY SPRINGS AND SUPPORTS
VEHICLE BODY THROUGH BOLSTER.
 BOLSTER-BOGIE
FRAME
THROUGH
SECONDARY
SUSPENSION.

(Bogie frame lifted)

Primary Spring assly

Primary Damper

MATERIAL PROPERTIES:
UTS IN Mpa
YIELD
STRENGTH
Mpa
ELONGATI
ON %AGE
IMPACT
CHEMICAL
%AGE:

S355J2G3;
EN10025
490-630
355

GS20Mn5V;
DINl:17182
500 – 650
360

SG400/18;
IS:1865
400
250

SG400/15;
IS:1865
400
250

22

24

18

15

27J AT -20
0
C
C 0.23, Mn
1.7, Si 0.6, S
&P 0.045

70 J

--

--

C 0.17 to
---0.23, Si 0.60,
Mn 1.00 to
1.50, S≤
0.020,
P≤
0.015, Cr ≤
0.30, Mo ≤
0.15, Ni
0.40
≤

---

Primary suspension
 Four nos each per bogie -nested coil springs, primary
vertical dampers, control arm, elastic joints-connecting the
bearing on wheelset to bogie frame.
 Flexible guidance.


(Primary exploded)

Rubber Pad
Outer Spring

Spring Guide

Inner Spring
Lower Spring Guide

Bump Stop

(Wheel set with Primary suspension)
Control Arm

Bearing Assly
with earthing
eq./speed sensor

(Wheel set with Primary springs removed)
Primary Damper

C

Control Arm

WHEELSET

Two brake disks (4), diameter
640 mm and width 110 mm.
 Two wheel discs of dia 915
(New), 845 (worn).


Wheel & Axle Assly

Brake Disc

WHEEL RE-PROFILING AND
BALANCING:
DYNAMIC BALANCING 320RPM
 LESS THAT/EQUAL TO 50GM.M
 GLUE THE NEEDED WEIGHTS.


AXLE BEARINGS
 CARTRIDGE

TAPER
ROLLER BEARING
 PRE-ASSEMBLED UNIT.
 MAINTENANCE FREEOVERHAUL 1.2 MILLION
KM.

BRAKE CALLIPER UNITS

AXLE MOUNTED DISC BRAKE
 INBUILT SLACK ADJUSTER IN BRAKE
CYLINDERS
 CALLIPER RATIO 1:2.17 FOR ALL
COACHES EXCEPT ACCN/SG & POWER
CAR WHICH IS 1:2.48
 35mm BRAKE PADS


 JURID

877/BECORIT984 KB & SABWABCO.

SECONDARY SUSPENSION

NEST OF FLEXI-COIL SPRINGS INNER AND OUTER,
RUBBER SPRING AND SECONDARY PAD
 VERTICAL DAMPERS
 LATERAL DAMPERS
 YAW DAMPERS
 ANTI-ROLL BAR
 ANCHOR LINKS


(With Bolster Lifted)
Sec. Vertical
Damper

Bogie Bolster

Cross Section

Nested
Secondary
Spring
Assembly
Yaw Damper

(With Secondary Spring System Exploded)
Bogie
Bolster
Miner Pad
Spring Guide
Outer Spring
Inner Spring

Rubber Spring

(Bolster removed)
Lateral Damper

Lateral Bumpstop

Longitudinal Bumpstop

(X-section lifted)
Traction Lever

Traction Center
Anti Roll Assly

Curve Roll

ANTI-ROLL BAR:
A TORSION BAR WITH TWO FORKS- BETWEEN
BOGIE FRAME & BOLSTER,CONNECTED BY
ROLL LINKS.
 RESISTS ROLLING MOTION OF COACH.
 AS PER UIC515-1 TILTING CO-EFFICIENT <0.4.


BUFFER HEIGHT ADJUSTMENT
Shims at body/bogie connection.
 Shims NOT added/removed in Primary and
Secondary Suspension for wheel wear compensation
or buffer height adjustment.


PRINCIPLES OF FORCE TRANSMISSION

Vertical forces:
 BODY-BOLSTER-MINER PAD-SEC.SUSPENSIONBOGIE FRAME-PRIMARY SPRINGS/BALL JOINT
CONTROL ARM-AXLES.


LATERAL FORCES:


BODY-BOLSTER-MINER
PAD/SEC.SPRINGS/LATERAL BUMP STOP-BOGIE
FRAME-BALL JOINT CONTROL ARM-AXLES.

TRACTION AND BRAKING FORCES:


BODY-TRACTION
CENTRE-TRACTION
LEVER/LONGITUDINAL
BUMP STOP-BOGIE
FRAME-CONTROL ARMAXLES.

CURVE NEGOTIATION:
CONTROL ARM (SGCI TO IS:1865) CONNECTING
AXLE BEARING AND SIDE FRAME THROUGH
ELASTIC CONNECTION.
 FLEXIBILE GUIDANCE TO WHEELSET.


SUSPENSIONS OF VARIANTS


THE COMMON SUSPENSION GROUPS ARE:
 GS,SCN,SLR
 CC,EC,CB,FAC/EOG,ACCW/EOG.
 ACCN/EOG,FAC/SG,ACCW/SG
 ACCN/SG,WLRRM
 WLRRM

SIDE 2.

SIDE 1.
 SLR UNDERSLUNG.

SPEED LIMIT
Cleared upto 160KMPH.
 upto 200KMPH with magnetic brakes/sintered brake
pads.


RIDE INDEX


CHAIR CAR:
 VERTICAL

2.75
 LATERAL 2.5

SELF-GENERATING BOGIE WITH VBELT:

CARDAN SHAFT ARRGT. FOR
25KW ALTERNATOR

Bogie under frame

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