面齿轮新型齿面结构弯曲强度计算机仿真分析  

Computer Simulation Analysis for Flexural Strength of Face Gear with New Tooth Fillet Surface

作　　者：吴学辉[1,2] 沈云波[1] 

机构地区：[1]中国航空工业集团公司航空动力机械研究所,湖南株洲410021 [2]西北工业大学动力与能源学院,陕西西安710072

出　　处：《机械传动》2011年第4期36-39,共4页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(50675176)

摘　　要：面齿轮的弯曲强度是影响面齿轮疲劳寿命的主要因素。提出了面齿轮齿根过渡部分为光滑曲面的一新型齿面结构,给出了应用插齿刀的齿顶圆角生成面齿轮过渡曲面的方法;建立了刀具齿顶圆角的法面方程,经坐标变换,导出了被切削面齿轮光滑过渡曲面的方程;利用数字齿面的方法,分别建立了刀具齿顶尖角和圆角两种结构所生成面齿轮的有限元模型并进行了齿面承载接触分析(LTCA)。计算机仿真结果表明,在相同的齿面载荷下,由齿顶圆角刀具所切削的面齿轮相比较尖顶刀具所决定的面齿轮,啮合点载荷产生的齿根最大弯曲应力下降了约12%左右。Flexural strength is a principal factor that defines the fatigue life of face gear.A new tooth structure with circular arc of fillet part for the face gear tooth are developed and a shaper with tooth rounded top is applied to generate the fillet part of helical face gear.The thesis derived the equations of fillet surface of the shaper.The coordinate systems are created for the face gear machining,with which the equations of fillet surface of face gear is conducted from the equations of rounded top of the helical shaper.Two versions of finite element model of tooth surfaces of face gear are generated.One version is based on the cutting shaper with tooth top peak and another version is the new structure of the shaper surface with addendum rounded top.Tooth contact analysis（TCA） and loaded tooth contact analysis（LTCA） for the two versions of face gear drives with helical spur gear are also considered.The results of simulation show that the bending stress of tooth surface of the face gear with fillet surface generated by the rounded top of the shaper is lower 12% than the first version＇s.

关 键 词：面齿轮 插齿刀 齿顶圆角 弯曲强度 

分 类 号：TH132.41[机械工程—机械制造及自动化]