摘要
直升机传动系统无油状态下的温度场分布是直升机工业普遍关注的问题,本文以直升机主减中换向锥齿轮传动系统为研究对象,基于热网络法建立了该系统的温度场计算模型;编程计算了该系统各部件的热源、各部件与滑油和油雾空气之间的对流换热系数以及各部件之间的热阻;求解了该系统的稳态温度场,以稳态温度场为基础,提出了换向锥齿轮传动系统瞬态温度场的计算方法,并依据此方法建立了瞬态温度场计算模型,最终得到了该系统的瞬态温度场分布。
Survival ability of a gear transmission system in helicopter after Loss-Of-Lubrication （LOL） is greatly dependent on the transient temperature fields of the systems. And the gearbox reversing bevel gear transmission sys- tem is extremely easy to failure after LOL because of its high rotate speed and power. So the transient thermal anal- ysis of a helicopter gearbox reversing bevel gear transmission system is needed while design a new model. To re- search its transient temperature fields, a reversing bevel gear transmission system in gearbox is researched in this paper, and the calculation model of temperature field is established based on the thermal network. The time- variance characteristics of thermal physical parameters, such as viscosity, thermal conductivity are considered in this model. Numerical simulations are performed to calculate the steady temperature field and transient temperature field and the results of steady state temperature field in the transmission system are used as initial values of the tran- sient temperature fields. The results agree well with the theoretical predictions.
出处
《机械科学与技术》
CSCD
北大核心
2013年第9期1298-1302,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
中央高校基本科研业务费专项资金项目(NP2012015)资助
关键词
换向锥齿轮
热网络法
瞬态温度场
failure （mechanical）
thermal conductivity
transient analysis
transmissions
bevel gears
calculations
design
efficiency
helicopters
mathematical models
temperature
temperature distribution
viscosity
reversing bevel gear
thermal network
transient temperature field
