Abstract
This paper concentrated on the effect of contact ratio on the contact stresses generated on meshing spur gear teeth during the power transmission. In this study, various contact ratios of spur gear teeth have been analyzed. For this contact ratio considered, the rate of loads sharing and angular position of loads were determined on the involute profile of meshing tooth of each gearing. In addition to that, the different stress conditions of this tooth for the critical position (at the instant when the generated contact stress is at the maximum state) are determined. From this study, it is clear that the highest contact ratio resulted in the lowest generated tooth stress (i.e. the highest load-carrying capacity). This approach reduced the contact stresses for power transmission. At last, the results obtained from Hertz’s contact stress formula and AGMA contact stress formula, and then compared allowable stress. They are comparable to each other.
Highlights
Gears are the most common types of transmitting power in the modern mechanical engineering world
S.C.Mohanty suggested an analytical method to calculated the individual tooth load during meshing cycle, he referred to determination of the locations and sizes of contact zones along the path of contact for high contact ratio gearing (3
The results of maximum contact stress Pmax, principal stresses ( σ1, σ2, σ3 ), maximum shear stress τmax and maximum Von Mises stress σvon shown in Table 2 &Table 3 respectively against contact ratio change for the contact area
Summary
Gears are the most common types of transmitting power in the modern mechanical engineering world. They change the rate of rotation of machinery shaft and the axis of rotation. Toothed gears are used to transmit the power with high velocity ratio. During this phase, they encounter high stress at the point of contact. [3].In this paper, the study of the various contact ratio and generated tooth contact stresses In this case of the contact ratio 1.6, 1.7, 1.8, 1.9 and 2.0 had been studied, as these ratios are used in gear sets in heavy machinery.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
