摘要
参考国外两级变速传动构型,基于某型直升机主减的结构布局,设计两级变转速直升机传动系统。利用集中质量法建立该型变转速直升机传动系统的动力学模型,模型中考虑时变啮合刚度、齿面摩擦、行星轮系的啮合相位以及各级齿轮副的综合传递误差等因素,推导系统的动力学微分方程。利用龙格库塔法进行数值求解,对比分析变转速直升机在相同工况下,高速级与低速级传动路径中系统的固有特性、动载荷、行星轮系的均载以及系统各级齿轮传动之间的耦合响应特性,研究输入功率、输入转速和摩擦因数对系统动力学特性的影响。研究结果表明:系统高速级路径中各级齿轮动载系数波动幅度较小,但低速级路径中两级行星轮系均载特性更优;可通过适当提高输入功率,降低输入转速来改善变速系统的动力学特性。
With reference to the foreign two-stage variable speed transmission configuration, a two-stage variable speed helicopter transmission system was designed, based on the structural layout of a helicopter's main reduction. The dynamic model including time-varying mesh stiffness, tooth surface friction, mesh phase relations of planetary gears and synthetic transmission error was proposed by using the method of lumped mass parameter. The vibration differential equations were derived and solved by Runge-Kutta method. The intrinsic characteristics, dynamic load, load sharing characteristics of the high-speed and low-speed transmission systems were solved and contrasted under the same conditions, and the effects of input power, input speed and friction coefficient on the dynamic characteristics of the system were studied. The results show that the dynamic load coefficient of gears in the high-speed path of the system fluctuates less, and the low-speed path of the two-stage planetary gears has better load sharing characteristics. At the same time, the dynamic characteristics of the system can be improved by increasing the input power and reducing the input speed.
作者
鲍和云
李丰波
陆凤霞
靳广虎
朱如鹏
邹小筑
BAO Heyun;LI Fengbo;LU Fengxia;JIN Guanghu;ZHU Rupeng;ZOU Xiaozhu(Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Institute of Scientific and Technical Information, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China)
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2019年第10期2403-2416,共14页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51975274)
中央高校基本科研业务费专项资金资助项目(NS2017031)~~
关键词
变转速直升机传动
两级变速
离合器
动力学特性
variable speed helicopter drive system
two-stage variable speed
clutch
dynamic characteristics