Contact Finite Element Analysis of Anti-backlash Double-roller-Enveloping Hourglass Worm Gearing

The anti-backlash double-roller-enveloping hourglass worm gearing is multi-tooth meshing transmission and it has complex tooth profile. It is difficult to obtain the load distribution among the meshing tooth pairs and the stress distribution along contact line with analytical model. So, based on the geometrical model of the anti-backlash double-roller-enveloping hourglass worm gearing, the Finite Element Method is used to analyze its load capability. The contact finite element model of this kind of worm gearing is created with 10-node tetrahedral element Solide92 and face to face contact mode. Using the nonlinear contact module of ANSYS software, the contact finite element model is solved with the large displacement static deformation mode. The results show that the load distributions among the meshing tooth under the different conditions are uneven. And the stress distribution along every contact line takes on an obviously descent trend from the addendum to the dedendum of worm wheel.