平面一次包络环面蜗杆副齿间载荷分配研究

Research on Load Sharing among Teeth of the Planar First Envelope Hourglass Worm Gearing

平面一次包络环面蜗杆两侧工作齿面为直纹曲面,利用这一特点提出了建立蜗杆副准确的三维实体模型的方法。完成了一对平面一次包络环面蜗杆副的精确三维实体模型,然后以中间格式导入ABAQUS。利用有限元法分析接触载荷在轮齿之间的分布,发现接触载荷从啮入到啮出过程是逐渐减小的。利用有限元法研究了母平面倾角β对于接触载荷分布的影响,发现在蜗杆齿面不出现非啮合区的前提下,β较大时载荷分布更均匀。

The two working surfaces of the first envelope worm are ruled surfaces,by this characteristic,a new method of establishing accurate 3D geometry model of the worm gearing is presented.A precise geometry model of the first envelope worm gearing is created,which is then imported into ABAQUS.By the contact finite element method,the contact loads among teeth are gained.It is found that the contact load decreases from the mesh-in tooth to mesh-out tooth.At last,the influence of the β on load sharing among teeth is researched by finite element method.It is found that if the non-contact zone doesn＇t exist on the gear surface of the worm,the higher the value of β is,the more smoothly the load distributes.