DESIGN FEATURES:

FIAT BOGIE

SUB-SYSTEMS

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

BOGIE FRAME

Primary Damper

Primary Spring assly

(Bogie frame lifted)

MATERIAL PROPERTIES:S355J2G3;EN10025

GS20Mn5V;DINl:17182

SG400/18;IS:1865

SG400/15;IS:1865

UTS IN Mpa 490-630 500 – 650 400 400YIELDSTRENGTHMpa

355 360 250 250

ELONGATION %AGE

22 24 18 15

IMPACT 27J AT -200C

70 J -- --

CHEMICAL%AGE:

C 0.23, Mn1.7, Si 0.6, S&P 0.045

C 0.17 to0.23, Si 0.60,Mn 1.00 to1.50, S0.020,P0.015, Cr 0.30, Mo 0.15, Ni0.40

---- ---

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.

Rubber Pad

Spring Guide Outer Spring

Inner Spring

Bump StopLower Spring Guide

(Primary exploded)

(Wheel set with Primary suspension)

Control Arm

Bearing Assly with earthing

eq./speed sensor

C

Primary Damper

(Wheel set with Primary springs removed)

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

DIMENSIONS OF WHEEL SET:

Wheel Disc:

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

DETAIL OF ADDED WEIGHTS:

AXLE BEARINGS CARTRIDGE TAPER

ROLLER BEARING PRE-ASSEMBLED UNIT. MAINTENANCE FREE-

OVERHAUL 1.2 MILLION KM.

CTRB

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.

BRAKE CALLIPER UNIT

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

SECONDARY SUSPENSION

(With Bolster Lifted)Bogie Bolster

Nested Secondary

Spring Assembly

Yaw Damper

Sec. Vertical Damper

Cross Section

(With Secondary Spring System Exploded)Bogie Bolster

Miner Pad

Spring Guide

Outer Spring

Inner Spring

Rubber Spring

SECONDARY SUSPENSION

Lateral Damper

Lateral Bumpstop

Longitudinal Bumpstop

(Bolster removed)

Anti Roll Assly

Traction Lever Traction Center

Curve Roll

(X-section lifted)

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.

ANTI-ROLL BAR:

A

Anti-roll assly

ANTI ROLL BAR

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.

BOGIE BODY CONNECTION:

BODY BOGIE CONNECTION

PRINCIPLES OF FORCE TRANSMISSION

Vertical forces: BODY-BOLSTER-MINER PAD-SEC.SUSPENSION-

BOGIE 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 ARM-AXLES.

A

Traction Center

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 SIDE 2. WLRRM SIDE 1. SLR UNDERSLUNG.

MAIN DATA:

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 V-BELT:

CARDAN SHAFT ARRGT. FOR 25KW ALTERNATOR

THANKYOU