船拖分动箱齿轮啮合特性分析  

Analysis of Meshing Characteristics for Gear in Boat-Type Tractor Transfer Case

作　　者：周明刚[1,2] 王俊 龚宇[1,2] 刘明勇 ZHOU Ming-gang;WANG Jun;GONG Yu;LIU Ming-yong(Research and Design Institute of Agricultural Mechanical Engineering,Hubei University of Technology,Hubei Wu-han 430068,China;Research and Design Institute of Agricultural Mechanical Engineering in Hubei Province,Hubei Wuhan 430068,China)

机构地区：[1]湖北工业大学农机工程研究设计院,湖北武汉430068 [2]湖北省农业机械工程研究设计院,湖北武汉430068

出　　处：《机械设计与制造》2021年第7期76-81,共6页Machinery Design & Manufacture

基　　金：湖北省科技厅重大专项(2016ABA091);湖北省技术创新专项(2017ABA164)。

摘　　要：船式拖拉机分动箱传动系统的特性为船式拖拉机动力系统平稳、高效运行关键因素,建立分动箱一级传动啮合齿轮热弹耦合模型。在额定工况条件下,对直齿圆柱齿轮传动啮合特性进行有限元接触仿真分析,研究了热弹耦合、不同摩擦系数对齿轮接触压力、齿面啮合区域法向载荷及啮合刚度的影响规律。结果表明,齿轮啮合过程中摩擦生热使得齿轮接触压力变小、啮合刚度变小,且齿面接触考虑摩擦系数时齿面接触压力与比不考虑摩擦系数齿面受到接触压力大。将仿真得到的时变啮合刚和刚度与理论计算值进行对比,验证有限元瞬态分析方法的可行性,为后续分动箱系统动态响应分析作基础,为降低齿轮转动过程产生振动与噪声和分动箱系统的优化设计提供依据。The characteristics of the transfer case transmission system of boat-type tractor are the key factors for the smooth and ef⁃ficient operation of the power system of boat-type tractor.The thermoelastic coupling model of the first transmission meshing gear of the transfer case is established.Under rated operating conditions,the meshing characteristics of spur gears are simulated by fi⁃nite element method.The effects of thermoelastic couple,different friction coefficients on tooth surface,which consists of gear con⁃tact pressure,direction load of tooth surface meshing area and meshing stiffness are discussed.The results show that the genera⁃tion of heat by friction reduces the contact pressure and meshing stiffness of gear and the contact pressure of tooth surface is larger than that of tooth surface without friction coefficient.The simulation results are compared with the calculated values to verify the feasibility of the finite element transient analysis method.It provides the basis for the dynamic response analysis of the transfer case system,and provides the basis for the reduction of vibration and noise in the transmission process and the optimization design of the transfer case.

关 键 词：接触压力 时变刚度 有限元 动态仿真 

分 类 号：TH16[机械工程—机械制造及自动化]