Advantages and disadvantages of low-speed diesel engines for marine diesel engine parts

The low-speed diesel engine of the ship is the main engine of the ship, which mainly provides power for the ship. According to the different characteristics of the working cycle, low-speed engines can be divided into two-stroke low-speed engines and four-stroke low-speed engines.

 (1) Two-stroke low-speed diesel engine

Two-stroke low-speed diesel engine is the leading product of marine low-speed diesel engine, as the main engine of large ships. The progress of two-stroke low-speed engines from ordinary models to modern models is mainly reflected in the increase in power and the reduction in unit fuel consumption, while meeting the international marine environmental protection requirements. The substantial increase in power greatly meets the needs of building large and giant ships; the reduction in unit fuel consumption meets today's human pursuit and desire for environmental protection, and meets the requirements of environmentally friendly engines.

 (2) Four-stroke low-speed diesel engine

Four-stroke low-speed diesel engine is a kind of low-speed marine diesel engine, which is rarely seen in the world. Its structure is the same as that of a two-stroke low-speed engine, which is divided into two parts: the cylinder and the crankcase. The working mode of the crankcase is the same as the four-stroke machine, and the working mode of the cylinder is the same as the two-stroke machine. According to the size of the model, the number of cylinders is generally between 4 and 8, and the stroke and unit fuel consumption are close to the two-stroke low-speed engine with the same number of cylinders, which can also meet the requirements of international marine environmental protection. But the speed is higher, generally the highest design speed can reach 390 r/min.

Japanese marine diesel engine design and manufacturers usually have technical patents for four-stroke low-speed diesel engines, and they are often used in various types of ships made in Japan, such as various transport ships, engineering ships, and ocean fishing vessels as main engines.

DK28 diesel engine parts, L28/32 diesel engine parts, marine diesel engine parts, large low-speed diesel engines, due to their high reliability and inferior quality fuel, have always been the main models of marine propulsion engines. Secondly, the maintenance cycle of low-speed machines can reach tens of thousands of hours, while high-speed machines must be overhauled for more than 10,000 hours. Finally, because the structure of the low-speed machine is larger and the speed is lower than that of the high-speed machine, the operation is relatively stable.

The advantages of low speed, life, wear, and maintenance are better than high speed. The advantage of high speed is its small size, which is more suitable for loading and other places with volume restrictions. The disadvantage is that the maintenance is troublesome and the service life is not as good as low speed.