摘要
齿轮的非稳态弹流润滑问题,由于啮合过程中滑滚比、曲率半径、卷吸速度和载荷变化范围较大,因此数值计算稳定性很差。而考虑热效应的齿轮非稳态弹流润滑问题,数值计算就更困难。文中应用多重网格技术,考虑时变和温度场的影响,求得齿轮非稳态热弹流润滑问题的完全数值解,结果更接近实际。数值解得到轮齿的摩擦因数、油膜最高温升沿啮合线的变化规律以及两轮齿接触点中心压力、中心膜厚、最小膜厚沿啮合线的变化规律,同时获得任意瞬时轮齿接触点的压力、膜厚和轮齿间油膜温度分布,对分析齿轮传动问题具有重要意义。
Meshing of gear is a typical example where non-stationary conditions exit. Load, velocities, curvature of meshing point varies along the line of action at any time. A complete numerical solution for the transient thermoelsatohydrodynamic lubrication problem of an involute spur gear is obtained by using simplified multigfid method. The gear teeth are assumed to be rigid. The load is first assumed to be carried by either two pairs of gear teeth or by only one pair. This transition from two to one pair or vice versa is modelled as a step variation of the load by simplifying the experimental load spectrum, The results show that thermal effects can strongly influence the approach and recess point film thickness. It also reveals that, the maximum pressure, the maximum friction coefficient and the highest film temperature all occur in the vicinity of pitch point. The minimum film thickness usually occurs at the approach point except reduction ratio equals to one. The film temperature and the friction coefficient influenced by the slide ratio and velocities are discussed.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2006年第3期363-368,共6页
Journal of Mechanical Strength
关键词
渐开线直齿圆柱齿轮
非稳态热弹流
多重网格法
Involute spur gear, Transient thernmelastohydroclymunic lubrication
Multigrid method
