摘要
基于刀具进行齿轮参数选取的传统设计方法,对于高速重载齿轮传动很难满足振动冲击小、质量轻等性能要求。基于齿轮传动的性能要求,建立了高速重载齿轮传动的参数直接设计方法。采用动载系数、最大接触应力和滑移率描述齿轮传动的性能指标,考察齿顶高系数、压力角、螺旋角、齿数比以及变位系数对齿轮性能的影响,为进行齿轮直接设计方法和参数优化奠定了理论基础。结果表明,增大齿顶高系数和螺旋角、减小压力角可以减小动载系数使得齿轮传动中的噪声和冲击减少;增大齿顶高系数、压力角和螺旋角可以减小齿面接触应力;减小齿数比可以减小滑移率;减小齿面接触应力和滑动率并在等滑移率曲线上选取变位系数能够避免齿面胶合和传动失效。
It is hard to meet the performance requirements of little vibration, impact and light weight for high - speed and heavy- duty gear transmissions based on the traditional design method which using the cutting tool for gear parameters selection. Based on basic performance parameter requirements of gear transmissions, a direct gear design method of high - speed and heavy - duty gear transmissions is built. Dynamic load coefficient, maximum contact stress and sliding rate are used together to conduct performance indexes of gear transmissions description. The effect of ad- dendum coefficient, pressure angle, spiral angle, gear ratio and displacements coefficients on basic performance pa- rameters of gear transmissions is investigated and a theoretical foundation of direct gear design and optimization parame- ters are provided. It is found that, the dynamic load coefficient can be decreased, so as to noise and impact of gear drives are reduced by increment of addendum coefficient and spiral angle, decrement of pressure angle. It is also found that, the slip rate can be decreased by increment of addendum coefficient, pressure angle and spiral angle can decrease the tooth surface contact stress, decrement of gear ratio, and the glue of tooth face and transmission failure can be avoided by optimum displacements coefficients.
出处
《机械传动》
CSCD
北大核心
2012年第7期21-23,26,共4页
Journal of Mechanical Transmission
关键词
高速重载齿轮传动
齿轮直接设计
齿轮参数
齿轮性能
High - speed and heavy - duty gear transmission Direct gear design Gear parameter Gear per-follTlance
