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文章简述了大功率柴油机活塞材料由普通铸铁、铝合金、钢顶(或铜顶)铝裙到整体薄壁球铁的发展历史。整体薄壁球铁活塞集中了其他活塞的优点。目前,法、西德等国已在缸径为120～400亳米的20多种船舶、机车用柴油机上采用,运用表明,其主要优点是: 1、结构合理、强度高、具有较大的承载能力、耐热、耐磨、耐疲劳性能好,使用安全可靠,使用寿命可达50000小时以上。 2、活塞与缸套的冷态间隙小,减小缸套振动,可防止缸套穴蚀。
The article outlines the development history of high-power diesel engine piston materials from ordinary cast iron, aluminum alloy, steel roof (or copper roof) aluminum skirt to the overall thin-walled ductile iron. The overall thin-walled ductile piston focuses on the advantages of other pistons. At present, France, West Germany and other countries have adopted more than 20 kinds of ships and locomotive diesel engines with a bore of 120 to 400 millimeters. The application shows that the main advantages are: 1. Reasonable structure, high strength and large bearing capacity Ability, heat resistance, wear resistance, good fatigue resistance, safe and reliable, the service life of up to 50,000 hours or more. 2, piston and cylinder liner of the cold clearance is small, reducing cylinder vibration, to prevent cavitation potholes.