INDIAN RAILWAYS : BEST ENGINE'S
Indian Railways uses a variety of diesel and electric engines for its trains. Some of the best engines used by Indian Railways are:
1. WAP-7 (Electric): A high-powered electric engine used for hauling long-distance express trains.
WAP-7 is the most powerful passenger locomotive over Indian Railways capable of hauling 24 coaches high speed trains. However, the maximum service speed of locomotive is 140 kmph.
Development of High Speed WAP-7HS Locomotive :
WAP-7 is the most powerful passenger locomotive over Indian Railways capable of hauling 24 coaches high speed trains. However, the maximum service speed of locomotive is 140 kmph. To operate the trains at faster speed and reduce the journey time, enhancing the maximum service speed of locomotive is necessary.
Indian Railway has undertaken project of upgradation of speed potential of WAP-7 locomotives from 140 kmph to 160 kmph. Chittaranjan Locomotive Works (CLW) turned out new version of WAP-7 locomotive (WAP-7HS) having potential of maximum service speed as 160 kmph. The complete design and development of locomotive have been done indigenously. The necessary simulation and modelling are carried out by CLW in-house. To enhance the speed of the locomotive, a weight reduction of about 14 tonnes have been carried out. The gear ratio has also been changed from 3.6 (72:20) to 3.2 (70:22). The software modification has been carried out to optimize slip-slide control and tractive effort. The locomotive shall be put into service after statuary tests and trials. The new type of locomotive is expected to facilitate operation of premium trains such as Rajdhani, Shatabdi and Duranto at higher speed.
1. Total H.P. - 6000
2. Wheel Arrangement - Co-Co
3. Max. Tractive effort at start - 286 kN
4. Total weight of loco - 109 t±1%
5. Axle loads (Max.) - 18.2 t±2%
6 Length over buffers - 20562 mm
6. Total width of loco - 3152 mm
7. Maximum service speed - 160 kmph
8. Gear Ratio - 3.2
The WAP-7 (Wide Ambit Power) is a type of electric engine used by Indian Railways for hauling long-distance express trains. It is known for its high power output and efficiency, which makes it ideal for high-speed trains that travel long distances.
2. WDP-4D (Diesel): A powerful and reliable diesel engine used for hauling express trains.
The WDP4D dual cab locomotive is equipped with a turbocharged 16-cylinder 2-stroke 710 G3B diesel engine. This engine has high fuel efficiency and requires low maintenance. The fuel efficiency of this locomotive is better than the existing locomotives.
Maximum speed -135 kmph. 9. Diesel Engine Type -16-710G3B. 10.
The Dual-Cab WDP4D EMD Stretches out in Full Length !
The WDP4D is the double cab version of the WDP4 and WDP4B, made by Indian Railways to silence the criticism about its odd shaped LHF end. This was made possible by attaching a cab to the cab-less end of the original EMD, which looks a bit awkward, though and at the same time making the long EMD even longer! Managed to take this shot in one take after a lot of work and leveling without using a flash. The “LHF” cab’s profile is sadly obstructed by a coach-position indicator.
The WDP-4D (Wide Diesel Power 4-stroke, high Horsepower, Dual Cab) is a type of diesel engine used by Indian Railways for hauling express trains. It is known for its powerful and reliable performance, which makes it ideal for trains that need to cover long distances in a short amount of time.
3. WDG-3A (Diesel): A versatile diesel engine used for hauling freight and passenger trains.
The WDG-3A (Wide Diesel Generator 3-Axle) is a type of diesel engine used by Indian Railways for hauling both passenger and freight trains. It is known for its versatility and ability to handle a variety of trains, making it a popular choice among Indian Railways.
Running of Twin WAGC3 locomotive converted WDG3A locomotive up to a maximum speed of 80 kmph on various electrified sections of Northern Railway.
WDG3A Diesel Electric locomotive :
W – Broad gauge
D - Diesel Engine
G – Goods Service
3A –Engine Horse Power -3100 HP
This loco is having up rated Diesel engine fitted with fuel efficient kit, Napier or GE make TSC, incorporated IRAB1 and facilitated with AC – DC transmission.
Main compartments of WDG3A Loco from short hood to long hood
1. Nose compartment
2. Loco Pilot cab
3. Control compartment
4. Alternator Room
5. Engine Room
6. Compressor Room
7. Radiator Room
8. Under truck
4. WDG-4 (Diesel): A newer diesel engine with improved fuel efficiency and power.
The model name stands for broad-gauge (W), Diesel (D), Goods traffic (G) engine, 3,100 hp (3A) locomotive.
The WDG4D dual cab locomotive is equipped with a turbocharged 16-cylinder 2-stroke 710 G3B diesel engine. This engine has high fuel efficiency and requires low maintenance. The fuel efficiency of this locomotive is better than the existing locomotives. This engine has many modern features like, laser hardened cylinder liners, unit fuel injectors which eliminate the problematic HP tube, Inconel valves, hydraulic valve adjuster, durable crankcase and piston structure. The diesel engine drives the main alternator.
Feature of dual cab has sufficiently improved the visibility for crew. The length of locomotive is 23002 mm over buffer to buffer, where as length of both cab is not same. The CAB-1 & CAB-2 length is 2377 and 2232 mm respectively. This locomotive has been designed to run up to maximum operating speed of 105 Km/h on BGroutes of Indian Railways. The tractive effort limiting switch has been provided in the driver cab of the locomotive & may be operated by the crew at the time of requirement.
MT-230 of May' 2000 indicate that the WDG4 locomotive exhibits satisfactory stability and riding qualities upto a maximum test speed of 115 km/h on track maintained to other than C & M-I Vol. -I standard.
The main alternator TA17 is a 3-phase, 10 pole, 90 slots machine equipped with two independent and interwoven sets of stator winding. The main alternator construction is such that it is basically two alternators in one - two sets of stator windings, permanently connected in series, work with a rotating field common to both the windings in order to provide higheralternator output voltage, which is a basic requirement of a low current high voltage alternatorused on AC-AC locomotives. The main alternator converts the mechanical power of dieselengine into 3-Phase Electrical Power alternating current. The internal rectifier bank of the main alternator converts 3 Phase AC Power into DC Power (alternating current into direct current) there by providing a DC power output. The DC voltage output from the main alternator is called the DC link voltage and is applied to the traction inverters. DC link voltage varies with the throttle position from 600 V DC at Throttle - 1 to 2600 V DC at Throttle - 8. The inverter changes DC power into variable frequency variable voltage 3 phase AC power for traction requirement as per the feedback control signals received from LCC & TCC. WDG4D locomotive is provided with self load test feature, capable of testing full output of the engine. There are three variants of traction alternator in this locomotive i.e M/s EMD, M/s BHEL and M/s Yongji at present.
These engines are known for their reliability, efficiency, and performance, and are constantly being upgraded and improved to meet the changing needs of Indian Railways.
No comments:
Post a Comment