摘要
针对柴油机强化过程中引起的正时齿轮振动加剧的现象,考虑了具有时变性的刚度、阻尼、误差和齿侧间隙,建立了正时齿轮系统曲轴齿轮副的动力学模型.分析了计入相位系数的啮合刚度、啮合阻尼、齿侧间隙和啮合误差对正时齿轮系统曲轴齿轮副的振动位移最大值和均载系数影响,并分析了计入相位系数的所有时变因素对位移最大值和均载系数的影响.结果表明:计入相位系数后的时变因素对振动位移最大值和均载系数的影响中,啮合误差最大,啮合刚度和齿侧间隙次之,而啮合阻尼几乎没影响;所有时变因素都考虑的情况下,随角度变化的位移最大值与最小值相差了6.9%,均载系数的最大值与最小值相差了11.8%;当相位系数选择(0.30,0.70)附近时,位移最大值和均载系数较大;当选择(0.50,0.50)或(0.97,0.03)附近时,位移最大值和均载系数较小.
The phenomenon of timing gear vibration is intensified in diesel engine.In order to analyze the effect of the timing gear phase coefficient on the timing gear vibration,a dynamic model of the crankshaft gear pair in timing gear system was established by considering the time-varying stiffness,damping,error and gear backlash.The effects of meshing stiffness,meshing damping,gear backlash and meshing error of including phase coefficient on the maximum vibration displacement and the load sharing coefficient of the crankshaft gear pair in timing gear system were analyzed,and the effects of all time-varying factors including phase coefficient on the maximum displacement and load sharing coefficient were also analyzed.The results show that the time-varying factors of including phase coefficient have important effects on the maximum vibration displacement and the load sharing coefficient.Among all the effect factors,the meshing error is the largest,the meshing stiffness and gear backlash are the second,the meshing damping has almost no effect.When all time-varying factors are considered,with variation of the angular,the difference of the maximum displacement and its minimum value is 6.9%and the difference of the maximum load sharing coefficient and its minimum value is 11.8%.In addition,the maximum displacement and the load sharing coefficient take larger values when the phase coefficient is around(0.30,0.70),and take smaller values when the phase coefficient is around(0.50,0.50),or(0.97,0.03).
作者
白金霖
赵俊生
李云强
郝晓华
章朝栋
李正文
Bai Jinlin;Zhao Junsheng;Li Yunqiang;Hao Xiaohua;Zhang Chaodong;Li Zhengwen(School of Mechanical Engineering,North University of China,Taiyuan 030051,China;State Key Laboratory of Engine Reliability,Weichai Power Company Limited,Weifang 261061,China)
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2020年第4期375-383,共9页
Transactions of Csice
基金
内燃机可靠性国家重点实验室开放基金资助项目(SKLER-201903).
关键词
柴油机
正时齿轮
相位系数
振动位移
均载系数
diesel engine
timing gear
phase coefficient
vibration displacement
load sharing coefficient
