This document summarizes a presentation on shafts and axles used in electric locomotives. It defines key components such as axles, shafts, gears, wheels, and traction motors. It then provides details on specific locomotives models WAP-4 and WAG-7 and their specifications. Finally, it lists and describes common failure conditions for components such as TM pinion teeth breaking, axle box bearing seizure, gear teeth breaking, and cracks in the motor suspension unit ribs.

1. Presentation
on
shaft and axle
Presented by-
Sanjay Sharma
11setme520
110106241

2. ELECTRIC LOCO SHED
KANPUR

3. CONTENTS
Introduction
 Axle
 Shaft
 Gear wheel end
 Road wheel end
 Traction
 Wheel
 Wheel press machine
WAP-4 Salient features
WAG-7 Salient features

4. Condition of failures
 Tm pinion teeth broken seizure
 Axle box bearing seizure
 Gear teeth broken seizure
 Tapper roller bearing seizure
 Enclosure rotate seizure
 Bearing housing moving loose seizure
 Racer loose seizure
 Racer spotted seizure
 MSU (Motor Suspension Unit) Rib Crack
seizure

5. AXLE

6. AXLE
 A central shaft for a rotating wheel or gear.
 Axle may be fixed to the wheels rotating
with them, or fixed to its surroundings.
 Bearing or bushing provided at mounting
points.
 Bearing or bushing sits inside the hole in
the wheel.

7. shaft

8. SHAFT
 Shaft is a mechanical component transmits
torque and rotation.
 Shaft used to connect other components of a
drive train can not be connected directly.
 Shaft are carries of torque.
 Shaft subject to torsion and shear stress.

9. Gear wheel end
• AXLE COLLER
• BULL GEAR
• ENCLOSURE
• END COVER
• TAPPER ROLLER
BEARING
• BEARING RACER
CUP

10. Road wheel end
• ADJUSTMENT WASHER
• BEARING HOUSING
• BEARING RACER CUP
• TAPPER ROLLER
BEARING
• END COVER
• ABUTMENT PIECE

11. TRACTION MOTOR

12. TRACTION MOTOR
MODEL NO. HS-15250A
CAPACITY 630 KW
RATING CONST
VOLTAGE 750 V
EXCITATION SERIES
CURRENT 500 A
COOLING AIR 80 m3/min
SPEED 895 rpm
POLES 6

13. wheel

14. WHEEL
 Wheel of a rake is a specifically made
cylindrical portion having an outer edge
shape to fit in the railway track. The
material is stainless steel.
 New wheel diameter is 915 mm.
 Cundem wheel diameter is 825 mm.
 Workshop release diameter is 837 mm.

15. WHEEL PRESS MACHINE

16. WAP-4 salient features

17. Wap-4
TYPES OF LOCOMOTIVE WAP-4
GAUGE 1676 mm
WHEEL ARRANGEMENT CO-CO
SERVICE PASSENGER
RATING OF TRACTION
630 KW
MOTOR
GEAR RATIO 23/58
MAX.SERVICE SPEED 140 km/hr
CONT.POWER OF LOCO 5060 hp

18. WAG-7 salient features

19. WAG-7
TYPES OF LOCOMOTIVE WAG-7
GAUGE 1676 mm
WHEEL ARRANGEMENT CO-CO
SERVICE FREIGHT
RATING OF TRACTION
MOTOR
HITACHI HS15250A
GEAR RATIO 16/65
MAX. SERVICE SPEED 100 km/hr
CONT. POWER OF LOCO 5000 hp

20. CONDITION OF FAILURES
1.TM pinion (TEETH BROKEN)SEIZURE
• Improper quality of oil.
• Inspect for crack.
• The spiral teeth of the pinion each have different spiral angles.
• Tm-4 pinion teeth broken as suspected collar matching.

21. 2.Axle box bearing seizure
• Clearance as per specification.
• Improper lubrication.
• Over heat the bearing.
• Axle box bearing over heat on piece of railway rolling stock.

22. 3.Gear teeth broken seizure
• There is no crack on teeth.
• Same height of all teeth.
• Same angle of all teeth.
• Improper lubrication.

23. 4.Tapper roller bearing seizure
• Proper mounting.
• Misalignment.
• Bearing fatigue and corrosion.
• Defective sealing.
• High temperature.

24. 5.Enclosure rotate seizure
• Brake the 6 bolts then enclosure is rotate.
• Enclosure is not fatigue and corrosion.
• High temperature.
• Improper lubrication.

25. 6.Bearing housing moving loose
• Size of MSU cup is increase on non gear side.
• Break the 8 bolts then bearing housing is loose.
• Racer loose.
• Bearing spotted .

26. 7.Racer loose seizure
• Gear or non gear side temperature is rising.
• Bolts loose.
• Abnormal sound in MSU.
• Housing loose.

27. 8.Recer spotted seizure
• Sound in axle bearing.
• The metal contact comes on mid of the roller then racer
is damage.
• Abnormal sound in MSU.
• Improper lubrication.

28. 9.MSU RIB CRACK SEIZURE
• Motor jerk will be increase.
• Traction motor bolt is break.

29. THANK YOU