基于船体变形及齿间摩擦的斜齿轮齿根弯曲疲劳强度计算  

Calculation of Bending Fatigue Strength of Helical Gear Tooth Root Based on Ship Hull Deformation and Interteeth Friction

作　　者：李秀莲[1] 

机构地区：[1]江苏大学汽车与交通工程学院

出　　处：《兵工学报》2008年第8期1019-1024,共6页Acta Armamentarii

摘　　要：当船舶在波浪中航行时,由于受到水浮力、水阻力、船舶重力及惯性力等作用,船体会产生中拱或中垂变形。研究表明,船体的这种变形会导致沿船体纵向布置的齿轮机构的轴承支座中心距产生变化,中心距的改变影响到轮齿的啮合传动,并最终对齿轮的寿命产生影响。另外,已有的研究也表明,齿间摩擦对齿轮强度的影响不可轻视。针对传统的船用齿轮在强度计算中不计船体变形及齿间摩擦力的问题,以沿船体纵向布置的渐开线斜齿减速齿轮机构中主动轮为研究对象,通过系统地分析、研究,推导出综合考虑船体变形及齿间摩擦的齿根弯曲疲劳强度优化计算公式。算例表明,船体变形及齿间摩擦的确对齿轮强度有着不可忽视的影响。The hogging or sagging deformation of boat hull may be due to water buoyancy and resistance, gravity and inertia of ship while a ship navigates by water. The research results have shown that the deformation can result in changing the center distance of bearing supports of the gearing arranged along the ship longitudinal direction. Under certain conditions, this change of the center distance affects the meshing performance of helical gearing, and leads to the reduction in the gearing life. In addition, the effect of interteeth friction on gear strength could be neglected, but it＇ s not the case for the helical gear fixed in boat. The optimal calculation equations for the bending fatigue strength of tooth root caused by the deformation of ship hull and interteeth friction were deduced by analyzing the forces exerted on the driving gear of helical gear drive. The calculation results show that the hull deformation and the interteeth friction have the great effect on the tooth strength.

关 键 词：机械设计 船体变形 摩擦 斜齿轮 弯曲疲劳强度 

分 类 号：U664[交通运输工程—船舶及航道工程] TH132.413[交通运输工程—船舶与海洋工程]