7/31/2019 Jaypratik (DLW)
1/23
SUBMITTED BY-
SUDHANSHU KUMAR
SEC-B3 SEM-7TH
ENROLMENT NO- SGVU091123291SUBMITTED TO-
NEHA TIWARI
A
REPORT
ON
DIESEL LOCOMOTIVE WORKS
VARANASI
Submitted By:
Jaypratik Goswami
M.Tech (DD) Electrical Engg.
Sec-B2 Sem-7th
Enroll No.- SGVU091123261
Submitted To:
Neha Tiwari
7/31/2019 Jaypratik (DLW)
2/23
7/31/2019 Jaypratik (DLW)
3/23
DLW is running under Indian government and certified with
ISO-9001,ISO-14001 and OHSAS-18001.DLW has dedicated 5700 locomotives to the nation.
400 locomotives to Indian non railways customer in public and
private sector.it also exported 100 locomotives to various
country.Its workshop spread over 8Km in area.
DLW exports its locomotives to various nations like Sri
Lanka, Bangladesh, Tanzania, Angola, Sudan, Myanmar and
many other NROs like BHEL,CIL etc.
7/31/2019 Jaypratik (DLW)
4/23
TYPES OF DIESEL
ELECTRIC
LOCOMOTIVES
Diesel Electric locomotives comes in three varieties
according to the period in which they were designed.
1. DC-DC (DC generators supplying power to DC traction
motors)
2. AC-DC (AC alternator output rectified to supply DC
traction motors)
3. AC-DC-AC (AC alternator output rectified to DC and
then inverted to 3 phase AC supply for the traction motors)
7/31/2019 Jaypratik (DLW)
5/23
Block Division1. Heavy Weld Shop2. Heavy Machine Shop
Loco Division1. Loco Frame Shop2. Pipe Shop3. Truck Machine Shop4. Traction Assembly Shop.5. Sheet Metal Shop6.Loco Assembly. Shop7. Loco Paint Shop8. Loco Test Shop
EngineDivision1. Engine Erection Shop2. Engine Testing Shop3. Light Machine Shop4. Sub Assembly Shop.
5.Rotar Shop6. Heat Treatment Shop
PRODUCTION
SHOPS
7/31/2019 Jaypratik (DLW)
6/23
Diesel
engineAlternator rectifier
governorTraction
control
Front
Traction
Motor
bogie
Rear
Traction
Motor
bogie
Basic concept
7/31/2019 Jaypratik (DLW)
7/23
7/31/2019 Jaypratik (DLW)
8/23
Component of diesel engine
1)-Valves- valves for a two stroke engine, there may simply be an exhaust outletand fuel inlet that is called valves system.
2)-Exhaust system- Exhaust system frequently contains device tocontrol pollution, both chemical and noise pollution.
3)-Cooling system- Combustion generates a great deal of heat, and some ofthis transfer to the wall of the engine. Cooling system usually employ air or liquid
(usually water) cooling.
4)-Piston- It is located in a cylinder and is made gas-tight by piston ringsused for a two stock engine. Piston are act as a valve by covering and uncovering
parts in the cylinder war.
5)-Crank shaft- A rotating rod transmit mechanical power in a machine.
7/31/2019 Jaypratik (DLW)
9/23
6)- Starter system- most piston engine use a starter motor powered by thesame battery as runs the rest of the electronic system.
7)- Lubrication system- Internal combustions engines requirelubrication in operation that moving parts slide smoothly over each other. In
sufficient lubrication subjects the parts of the engine to metal to metalcontact,fraction,heat build-up etc.
7/31/2019 Jaypratik (DLW)
10/23
Traction motor
Electrical motor providing the primary rotational torque
of a machine usually for conversion in to linear motion
Dc series wound motor running on approximately 600
volt.
7/31/2019 Jaypratik (DLW)
11/23
Alternator
Alternator generate the
electricity by the same
principle as Dc-generator.
when the magnetic fieldaround the conductor
changes a current is
induced in the conductor
according to the faradays
law of electromagneticinduction.
7/31/2019 Jaypratik (DLW)
12/23
BASIC COMPONENTS OF A DIESEL
ELECTRIC LOCOMOTIVE
7/31/2019 Jaypratik (DLW)
13/23
A diesel engine is started (like an automobile) by turning over the crankshaftuntil the cylinders fire or begin combustion. The starting can be done
electrically or pneumatically. Pneumatic starting was used for someengines. Compressed air was pumped into the cylinders of the engine until itgained sufficient speed to allow ignition, then fuel was applied to fire theengine. The compressed air was supplied by a small auxiliary engine or by highpressure air cylinders carried by the locomotive.
Electric starting is now standard. It works the same way as for an automobile,with batteries providing the power to turn a starter motor which turns over the
main engine. In older locomotives fitted with DC generators instead of ACalternators, the generator was used as a starter motor by applying battery powerto it.
STARTING OR CRANKING
OF LOCOMOTIVE
7/31/2019 Jaypratik (DLW)
14/23
Inverter change the Dc voltage into Ac voltage.
At the time of cranking starter draws very heavy
current which is in the form of 800 amps and voltagebecomes low.
Voltage should not be less than 28v.
After cranking of engine , alternator rotates thesecondary alternator.
Due to rotation of secondary alternator it gives the
supply to the battery through the rectifier.And rectifier charge the battery during the running
condition of locos.
7/31/2019 Jaypratik (DLW)
15/23
Governor
A device used to
measure and regulatethe speed of an engine.
The governor control
the engine speed based
on throttle handle
position.
Engine rpm is
measured by a tachogenerator or engine
speed sensor mounted
on a engine.
7/31/2019 Jaypratik (DLW)
16/23
Engine Testing
Purpose-
To check the leakage in oil, fuel oil and water ckt.
to check the capability of engine i.e-BHP.
to check the engine RPM at different notches.
checking for any abnormalities
7/31/2019 Jaypratik (DLW)
17/23
Weight- 80 ton engine- 12 cylinder
excel weight-20 ton
wheel diameter-1092mm
Gear ration-18:65
maximum speed- 140km/hr
fuel capacity- 3000 litre
WDG-5
7/31/2019 Jaypratik (DLW)
18/23
Broad gauge.
Main line.
4500hp (IGBT based)
Freight locomotives.
WDG4 WDP3
TYPES OF
LOCOMOTIVES
Broad gauge.
Main line.
4500hp (IGBT based).
Passenger locomotive
7/31/2019 Jaypratik (DLW)
19/23
Broad gauge.
Main line.
3100hp.
Freight locomotive.
Broad gauge.
Main line.
3300hp
Mixed service loco.
WDG 3A WDM 3D
7/31/2019 Jaypratik (DLW)
20/23
1350hp.
Broad gauge.
Shunting locomotive.
Meter gauge.
Main line.
1350hp
Mixed service loco.
WDS6 YDM4
12 cylinder,2350hp locomotive for meter gauge and cape
gauge.
7/31/2019 Jaypratik (DLW)
21/23
WDG-4 WDP-4
WDG-3A WDM-3D
WDS-6 YDM-4
7/31/2019 Jaypratik (DLW)
22/23
DRIVER CABIN
ALERTER
7/31/2019 Jaypratik (DLW)
23/23