Analysis of Bevel Gears Using ANSYS Software Package
Authors: Karatushin S.I., Pleschanova Y.A., Bildyuk N.A., Bokuchava P.N. | Published: 11.05.2016 |
Published in issue: #5(674)/2016 | |
Category: Technology and Process Machines | |
Keywords: bevel gears, stress-strain state, cementation, residual stresses, contact status, ANSYS |
Analytical calculations of bevel gears are more complex than those of cylindrical ones. To calculate the forces in an engaged gear, a bevel gear is replaced by an equivalent cylindrical one. The complex geometry of the engagement, multiple correction factors, and dependence on the actual gear installation lead to significantly varying results. The use of the bearing pattern as a measure of the engagement correctness improved the quality of the calculations. The next step in improving the accuracy characteristics of the engagement was the use of computer models of bevel gears, based on which the principles of calculations were developed further. The application of ANSYS software package is of interest for calculating effective stresses in gear contact areas. This paper deals with the stress-strain state (SSS) of engaged gears of three types: with spur, tangential and circular teeth. For each gearwheel pair, the gear is considered as a carburized one, while the wheel is considered without cementation. Cementation introduces residual stresses that have a significant impact on the stress-strain state and the power calculation principle. The principal and shear stresses in contacts are calculated, and an evaluation of the contact status is given. Based on the results of the stress-strain state calculations, a method is proposed for checking the accuracy of calculations of the bearing and bending strength of bevel gears.
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