摘要
非穿透型齿根裂纹是最接近实际工况的齿轮故障。以有限元法模拟三维非穿透型齿根裂纹扩展过程,计算应力强度因子,确定了裂纹扩展路径。针对齿轮啮合特点模拟健康齿轮的啮合过程,计算健康齿轮的啮合刚度,通过与ISO6336-1∶2006进行对比,验证了计算结果的准确性。以此方法为基础,提出了非穿透型裂纹啮合特性分析方法,分析了齿宽方向不同穿透程度的齿根裂纹和齿廓方向裂纹尾部不同高度的齿根裂纹对啮合刚度的影响。结果表明,随着裂纹穿透程度的增加,应力强度因子逐步增加;随着裂纹在齿宽方向穿透程度的增加和在齿廓方向高度的增加,啮合刚度有着不同的降低幅度;齿根裂纹在齿宽方向穿透程度的增加比在齿廓方向裂纹尾部高度的增加对啮合刚度的影响更加显著;不同裂纹类型对齿轮等效应力及总位移也有明显的影响。
Non-penetrating root crack is a gear fault closest to actual working conditions.The finite element method is used to simulate propagating process of three dimensional non-penetrating gear root crack.The stress intensity factor is calculated and the crack propagation path is determined.According to the meshing characteristics of gear,the meshing process of healthy gear was simulated by finite element method.The meshing stiffness of healthy gear was calculated,and the accuracy of results was verified by ISO636-1∶2006.Based on this method,a non-penetrating crack meshing analysis method was proposed.The influence of dedendum crack,including dedendum crack of different penetration in the tooth width direction and that of different heights the tooth profile direction,on meshing stiffness was analyzed.The results show that the stress intensity factor increases gradually with the increase of crack penetration.The meshing stiffness is different reduction with the increase of crack penetrates in the tooth width direction and in the tooth profile height direction.The influence of the dedendum crack penetration increase in the tooth width direction on meshing stiffness is more significant than that of the increase in the tooth profile crack tail height.Different gear crack types also have a significant effect on the equivalent stress and total displacement.
作者
刘杰
孙玉凤
王成烨
LIU Jie;SUN Yu-feng;WANG Cheng-ye(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《重型机械》
2018年第6期36-42,共7页
Heavy Machinery
基金
国家自然科学基金(51305276
51675350)
沈阳市双百工程(Z17-5-067)
关键词
非穿透型齿根裂纹
应力强度因子
啮合刚度
等效应力
总位移
non-penetrating root crack
stress intensity factor
meshing stiffness
equivalent stress
total displacement
