International Journal of Vehicle Structures and Systems

Open Access Open Access  Restricted Access Subscription Access

Effect of Adjacent Teeth Load on Bending Strength of High Contact Ratio Asymmetrical Spur Gear Drive


Affiliations
1 Dept. of Mech. Engg., Dr. Mahalingam College of Engg. and Tech., Pollachi, Tamilnadu, India
 

   Subscribe/Renew Journal


This paper describes methodology for predicting the bending stress of the spur gear accurately by including the load on the adjacent teeth for high contact ratio asymmetric spur gear drive. Higher contact ratio is obtained by enlarging the addendum from the standard addendum value where as the asymmetric is achieved by keeping various pressure angles (170, 200 and 220) at non drive side while the drive side pressure angle was kept as 200. The bending stress developed for the given load according to the load sharing calculated by using stiffness based method along with the effect of adjacent teeth loads are explored in this work. Computer aided design tool is used for generating the gear tooth profile and ANSYS is used to carry out the finite element analysis. The result shows that the maximum bending stress level in a mesh cycle is increased when the load on adjacent teeth are taken into account. The higher pressure angle at the non-drive side yields lesser stress at the fillet region when compared to the lower pressure angle.

Keywords

Asymmetric Gear, High Contact Ratio, Load Sharing Ratio, Finite Element Analysis, Transmission System.
User
Subscription Login to verify subscription
Notifications
Font Size

  • F.W. Brown, S.R. Davidson, D.B. Hanes, D.J. Weires and A.L. Kapelevich. 2011. Analysis and testing of gears with asymmetric involute tooth form and optimized fillet form for potential application in helicopter main drives, Gear Technology, 34, 46-55.

  • A.H. Eikholy. 1985. Tooth load sharing in high-contact ratio spur gears, ASME J. Mechanism Transmission Automation in Design, 107, 11-16. https://doi.org/10.1115/1.3258674.

  • J. Wang and I. Howard. 2007. A further study on highcontact-ratio spur gears in mesh with double-scope tooth profile modification, Proc. Int. Design Engg Tech. Conf.and Computers and Information in Engg., Nevada, USA. https://doi.org/10.1115/detc2007-34461.

  • V.B. Mallesh, M. Venkatesh, H.J. Shankarmurthy, P.S. Prasad and K. Aravinda. 2009. Parametric analysis of asymmetric spur gear tooth, Proc. 14th National Conf. on Machines and Mechanisms, Durgapur, India.

  • A.S. Novikov, A.G. Paikin, V.L. Dorofeyev, V.M. Ananiev and A.L. Kapelevich. 2008. Application of gears with asymmetric teeth in turboprop engine gearbox, Gear Technology, 60-65.

  • S. Olguner and I.H. Filiz. 2014. A study on the design of asymmetric spur gears in gear pump applications, The Authours, 406-417.

  • R. Thirumurugan and G. Muthuveerapan. 2011. Critical loading points for fillet and contact stress in normal and high contact ratio spur gears based on load sharing ratio, Mechanics Based Design of Structures and Machines, 39(1), 118-141. https://doi.org/10.1080/15397734.2011. 540488.

  • R. Thirumurugan and G. Muthuveerappan. 2013. Study on mesh power losses in high contact ratio (HCR) gear drives, Proc. 16th National Conf. Machines and Mechanisms, Roorkee, India.

  • R. Thirumurugan and G. Muthuveerappan. 2010. Maximum fillet stress analysis based on load sharing in normal contact ratio spur gear drives, Mechanics Based Design of Structures and Machines, 38(2), 204-226. https://doi.org/10.1080/15397730903500842.

  • M. Rameshkumar, P. Sivakumar, S. Sundaresh and K. Gopinath. 2010. Load sharing analysis of high-contactratio spur gears in military tracked vehicle applications, Gear Technology, 43-50.

  • M. Rameshkumar, G. Venkatesan and Sivakumar. 2010. Finite Element Analysis of High Contact Ratio Gear, A.G.M.A. Technical Paper.

  • M.K. Rosen and H.K. Frint. 1982. Design of high contact ratio gears, J. Am. Helicopter Soc., 65-73.

  • I.S. Shankin, A. Alexander, Stupakov, I.L. Glikson, V.M. Ananiev and A.L. Kapelevich. 2014. Modernization of main helicopter gearbox with asymmetric tooth gears, Proc. 25th Int. Conf. Design Theory and Methodology, Portland, Oregon, USA

  • D.P. Townsend, B.B. Baber and A. Nagy. 1979. Evaluation of High-Contact-Ratio Spur Gears with Profile Modification, NASA Technical Paper 1458.

  • S. Wang, G.R. Liu, G.Y. Zhang and L. Chen. 2011. Accurate bending strength analysis of the asymmetric gear using the novel ES-PIM with triangular mesh, J. Automotive and Mech. Engg., 4, 373-397. https://doi.org/ 10.15282/ijame.4.2011.1.0031.


Abstract Views: 271

PDF Views: 109




  • Effect of Adjacent Teeth Load on Bending Strength of High Contact Ratio Asymmetrical Spur Gear Drive

Abstract Views: 271  |  PDF Views: 109

Authors

Rama Thirumurugan
Dept. of Mech. Engg., Dr. Mahalingam College of Engg. and Tech., Pollachi, Tamilnadu, India
C. Clement Christy Deepak
Dept. of Mech. Engg., Dr. Mahalingam College of Engg. and Tech., Pollachi, Tamilnadu, India
K. Karthieeban
Dept. of Mech. Engg., Dr. Mahalingam College of Engg. and Tech., Pollachi, Tamilnadu, India

Abstract


This paper describes methodology for predicting the bending stress of the spur gear accurately by including the load on the adjacent teeth for high contact ratio asymmetric spur gear drive. Higher contact ratio is obtained by enlarging the addendum from the standard addendum value where as the asymmetric is achieved by keeping various pressure angles (170, 200 and 220) at non drive side while the drive side pressure angle was kept as 200. The bending stress developed for the given load according to the load sharing calculated by using stiffness based method along with the effect of adjacent teeth loads are explored in this work. Computer aided design tool is used for generating the gear tooth profile and ANSYS is used to carry out the finite element analysis. The result shows that the maximum bending stress level in a mesh cycle is increased when the load on adjacent teeth are taken into account. The higher pressure angle at the non-drive side yields lesser stress at the fillet region when compared to the lower pressure angle.

Keywords


Asymmetric Gear, High Contact Ratio, Load Sharing Ratio, Finite Element Analysis, Transmission System.

References





DOI: https://doi.org/10.4273/ijvss.9.1.07