Analysis of Field of Stress and Displacement in Process of Meshing Gears

Base on the successively engaging projection called teeth, gears are direct contact bodies, operating in pair, that transmit motion and force from one rotating shaft to another, it is one of the most important mechanical transmission forms in the field of mechanical engineering, it has various forms and uses widely, but the consequences caused by gear failure are often serious. Loaded contact performance, tooth contact stress and tooth root bending stress of the pair of gears are an important concerned index in the successive process of engagement. The precise modeling of involutes cylindrical gear is obtained by using the large scale CAD software, and using of the data interface of the finite element analysis software, it can import the model in the form of dxf into the finite element analysis software, the model of three dimensional finite element nonlinear contact was established. According to the geometric shape of the tooth, it can divide the model into lattice and impose the appropriate boundary conditions, it can be obtain the quasi static characteristics of the meshing tooth by using the finite element analysis. The results of numerical analysis showed that the model can accurately simulate the distribution of equivalent stress and the changing displacement in the process of tooth meshing gear, which verify the accuracy of the model, and the model can be used to deal with the dynamic meshing problem of gears.