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工程机械和载重汽车用柴油机的主要发展趋势是增压机型比重日益扩大,产量逐年增加,国外200马力以上的工程机械和载重汽车用柴油机达到50～80%以上。涡轮增压器的结构随着科学技术的发展,趋向简单化,主要零件由90个减少到32～15个,结构上的简化和可靠性的提高,为增压器小型高速化的发展提供了可能。涡轮增压器的排气涡轮的工作条件最恶劣,工作温度在1300℃左右,轴承润滑受高温影响,易产生过热,引起轴承变形,各种型号
The main development trend of diesel engines for construction machinery and trucks is that the proportion of supercharged models is increasing day by day, and production has increased year by year. Construction machinery and diesel engines for trucks with more than 200 horsepower in foreign countries have reached 50-80%. With the development of science and technology, the structure of the turbocharger tends to be simple. The number of main parts has been reduced from 90 to 32 to 15, and the structural simplification and reliability have been improved, providing the development of supercharger compact high speed. may. Turbocharger exhaust turbine working conditions are the worst, the working temperature is around 1300 °C, the bearing lubrication is affected by high temperature, easy to produce overheating, causing the bearing deformation, various models