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活塞环是活塞式发动机和压缩机的一项主要零件,受磨擦较为剧烈。在内燃发动机中,活塞环承担着以下三项主要任务:(1)将汽缸密封,使燃烧气体或空气不致逸出,从而保证所需的压缩性;(2)防止滑油进入燃烧室;(3)将汽缸内燃烧后的高温传导至汽缸壁,再散至冷却水或空气。现代发动机的设计趋于高速、高压缩比,因而活塞环就处于高温、高摩擦速度、和润滑条件恶劣的状态下工作。如何制造高质量的活塞环来适应其工作条件,使发动机达到预期的效率和足
Piston rings are a major component of piston engines and compressors and are subject to severe friction. In internal combustion engines, the piston rings undertake three major tasks: (1) sealing the cylinder so that combustion gases or air do not escape, thereby ensuring the required compressibility; (2) preventing oil from entering the combustion chamber; ( 3) Conduct high temperature combustion in the cylinder to the cylinder wall, and then to the cooling water or air. Modern engines tend to be designed for high speeds and high compression ratios, so the piston rings work at high temperatures, high friction speeds, and poor lubrication conditions. How to make high-quality piston rings to adapt to their working conditions, so that the engine to achieve the desired efficiency and foot