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The birth of this 6RT-flex68-D diesel engine is the perfect embodiment of the company's development in the world of diesel engine manufacturing, taking into account the actual needs of customers. The machine adopts Wärtsilä's new improved design, which reduces parts procurement cost and manufacturing cost, and greatly improves the efficiency of host assembly and debugging. The 6RT-flex68-D diesel engine adopts the Delta tuning adjustment mode. Under the premise of not changing the mechanical parts of the main machine and not affecting the reliability of the main engine, the control parameters of the fuel injection and exhaust valves can be flexibly selected through the software control system of the main engine to achieve low fuel consumption. Consumption. The fuel supply unit of the main engine is characterized in that the fuel supply system and the servo oil supply system are separately designed to enhance the stability of the main engine.
The scavenging box of the main engine adopts the Underslung design, and the gas-water separator is located vertically below the air cooler, so that the compressed air passing through the air cooler is sufficiently condensed and separated by the gas-water separator in the lower space of the scavenging air tank, and the condensed water is as completely as possible. The ground air flows out of the scavenging air box, and the quality of the fresh air entering the air scavenging space of the cylinder is greatly improved, thereby improving the combustion condition of the main engine. The mainframe is equipped with two new high-efficiency superchargers to improve the efficiency of the main engine while reducing fuel consumption, saving the ship a large fuel bill in the future.
The 6RT-flex68-D main air cooler cleaning device was originally designed to clean the air cooler with high-pressure air compression chemical water. The cleaning water cannot be reused, and the operation is troublesome. The technicians changed the original design of Wärtsilä directly to the high-pressure cleaning syrup, which was very effective and satisfied the shipowner. The main design of the cylinder cooling water inlet and outlet pipe is at the output of the main engine, but the shipyard water tank is designed at the free end of the ship. In order to meet the shipyard pipeline layout requirements, the company changed the cylinder cooling water of the main engine into the water pipe from the output end of the main engine to the free end, which saved the shipyard cost.
During the assembly and commissioning phase of the mainframe, the relevant units will work shifts 24 hours a day, and timely feedback will occur, which will be solved at the fastest speed to ensure the requirements of the shipyard. Shipowners' representatives, Wartsila company representatives, shipyard representatives and NK classification society surveyors have always been highly concerned. They maintain close communication and coordination with relevant department personnel, and give great support to the company's research and development. Solid backing.
The successful implementation of this new 6RT-flex68-D diesel engine has enabled Dalian Shipai to make further breakthroughs in the construction of the Wärtsilä mainframe, and has taken a solid step towards the goal of a world-class machine builder.
Recently, Dalian Marine Diesel Engine Co., Ltd. made the world's first Wärtsilä's latest modified DMD-Wartsila 6RT-flex68-D intelligent diesel engine successfully completed the bench test, and all technical parameters met the design requirements. The main engine has a power of 18,780 kW and a total weight of 472 tons. It meets the Tier II emission requirements and will be installed on a 180,000-ton bulk carrier built by Barge Heavy Industries for the Transmed.