气缸功率变化对发动机振动的影响  

The Effects of Cylinder Power Change for Engine Vibration

作　　者：姚嘉伶[1] 蔡伟义[1] 解梅[1] 

机构地区：[1]南京林业大学机械电子工程学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2005年第3期49-52,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：南京林业大学科技创新基金(CX2004-05)

摘　　要：分析了多缸发动机正常振动时激振源的平衡性,以及发动机在车架上的振动形式。试验结果表明,个别气缸功率变化时可能发生变化的激振源主要是反倒力矩;由于功率不平衡,各缸本应相互抵消的各非主谐次的反倒力矩,很多谐次都出现且互相助长,导致总的反倒力矩平衡性恶化,致使发动机振动加剧。Balance of engine’s exciting vibration sources while the engine normally vibrated was analyzed, the engine vibrating forms on the frame were discussed.The results showed that the overturn moment is the main exciting vibration source which will change when individual cylinder power changes. Because of overbalanced cylinder power,every cylinder’s non-main harmonic overturn moments (appearing in many harmonics and uniting together now) should offset each other which lead to worsen the balance of the gross overturn moment,and aggravate engine vibrating.Finally,an engine was experimented by the method of the vibration analysis.

关 键 词：气缸 功率变化 发动机 振动 

分 类 号：TH138[机械工程—机械制造及自动化]