A review by S. G. Illangasekara (Grade 11E)
The Railway Workshops Complex at Ratmalana stands as an engineering marvel in the Sri Lankan railway sector, showcasing both primeval machine technology and architecture. These workshops play a vital role in the smooth operation of Sri Lanka Railways, being responsible for repairing, rescheduling, and maintaining locomotives, coaches, and rolling stock, encompassing all aspects such as mechanical and electrical components.
A Learning Expedition: Annual Student Visit
On the 7th of May, 2024, 18 students studying Design Mechanical Technology and Engineering Technology embarked on their annual visit to the workshops. Guided by Mr. Subash Dhanasekara, Mr. Subash Wijewardana, Mr. Wasana Dissanayaka, and Mr. Mahesh Udurawana, the students eagerly anticipated this rare opportunity to witness the engineering and technology behind the railway and its locomotives.
Exploring the Workshops
Diesel Multiple Units and Shunting Engines
The first stop was Workshops 27/28, housing the Diesel Multiple Units (DMUs) and Y class shunting engines. Here, students learned about the technical aspects of the DMUs, how the engines are powered, and were allowed to observe the interiors of these complex vehicles.
Maintenance of Auxiliary Systems
Next, the students visited Workshop 35, the maintenance hub for auxiliary generators and motors. These generators provide electricity to auxiliary systems such as lights, air compressors, and air conditioning in locomotives. The students were educated on this sophisticated system and the concept of dynamic braking, a process of decelerating a train on a downgrade using traction motors as generators.
Traction Motors and Generators
The field visit continued with Workshop 39, where traction motors and generators, crucial components in a locomotive, are maintained. Traction motors convert electrical energy to mechanical energy, spinning the wheels of the locomotive.
Diesel-Electric Locomotives
In Workshop 16, the students observed the 4-stroke diesel-electric locomotives undergoing repair and overhaul. They learned about the technical aspects of Class M4, M5, M8, and M10 locomotives and got the unique opportunity to explore the driving cabins of these fascinating machines.
Two-Stroke Diesel-Electric Locomotives
The highlights continued with Workshop 14, responsible for repairing and overhauling the 2-stroke diesel-electric locomotives. Students observed the prime movers and cabins of notable locomotives such as Class M2, M6, and M7, and the newest locomotive in service, Class M11.
Casting and Manufacturing: Foundry and Machine Shop
The Foundry
After examining the major workshops, the students were guided to the Foundry. Here, iron is melted in large furnaces and poured into molds to cast parts required for locomotives. Experienced supervisors and staff educated the students on the casting process, including aluminum and steel casting.
The Machine Shop
The visit continued to the Machine Shop, where parts such as locomotive couplers, bolts, and nails are shaped and manufactured. The Workshop Foreman demonstrated the locomotive coupling system and explained the ancient yet efficient machines used to manufacture these components.
The Traverser: An Engineering Sensation
The students concluded their visit with a stop at the Traverser, an engineering marvel capable of relocating carriages from shop to shop by horizontally moving them along a set of three parallel broad-gauge tracks. The field visit ended with a group photo on the traverser, marking a successful and enlightening experience.
Conclusion: A Glimpse into Railway Engineering
The annual field visit to the Ratmalana Railway Workshops provided the students of Trinity College with invaluable insights into the technology and craftsmanship prevalent within Sri Lanka Railways. This educational odyssey not only enriched their knowledge but also inspired a deeper appreciation for the engineering feats behind railway operations.
