Natural characteristics analysis and experimental test of spiral bevel gear pair in the tractor transmission system

Spiral bevel gear is widely used in various mechanical transmission systems, such as tractor system. Because it mainly the heavy-load conditions, would most likely resonate within rated speed, resulting tooth fatigue damage. In this paper, based on principle of meshing and machining, spherically involute profile equation spiral deduced precise modeling method CATIA studied. The natural frequency modal shape under free vibration are obtained by finite element (FEM), influence web thickness hole driven plate analyzed well. addition, experimental pair carried out a multiple-reference impact test, Modal Assurance Criterion (MAC) calculated, three-dimensional accuracy analysis reliability verified. results show that error between measured calculated simulation both 5%, MAC above 0.8. fourth-order sensitive to thickness, second-order hole.