Experimental Setup and Methodology to Carryout Fatigue Testing of Spiral Bevel Gears Used in Differential Gear Box Using NVH Approach

Abstract:

Currently the fatigue testing of bevel gears are being done by using non rotating type of fixtures that applies fatigue load on a single tooth, which does not resemble the actual loading condition in an automotive differential gear box. This paper discusses the experimental setup with the noise and vibration analysis approach to determine the signature of failures of spiral bevel gears. The proposed experimental setup seems promising for further research and development in the fatigue testing of spiral bevel gears. The Crown pinion and wheel assembly is used for the testing. The pinion is connected to the electric 3 phase AC motor of 75HP with a suitable coupling and the crown wheel is mounted on the half axle shaft, which in turn is connected to an electric dynamometer. The speed/torque of electric motor and the load applied by the dynamometer can be varied. The acoustic sensor is mounted near the differential gear box and the accelerometers are mounted on the Pinion bearing, Crown wheel bearing and the half axle bearing. A four channel data acquisition system is used to log data in time domain (raw data) by three accelerometers and an acoustic sensor. The variations of sound pressure(dB) v/s time, sound Pressure(FFT-(RMS)) amplitude v/s Frequency, Acceleration v/s Time, Octave analysis i.e., Band power v/s Frequency, Noise spectrum Power v/s Frequency, Histogram, Power density v/s Time can be obtained. These data are then used to plot vibration and SPP levels in frequency domain to develop the noise and vibration signature of that crown pinion for given cycles of operation. The tests on Bevel pinion and gear set were performed in the BEC, Bagalkot NVH lab facility. The gear set run successfully at double the rated torque for 30 million pinion cycles. And the signature of pinion failure was obtained. The results demonstrated the suitability of using the given bevel crown pinion and gears set for specified speed, high load application in differential gear box of an automobile.

• Periodical: Applied Mechanics and Materials (Volume 852)
• Pages: 545-550
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.852.545
• Online since: September 2016
• Authors: Iresh Bhavi*, Vinay Kuppast, Shivakant Kurbet
• Keywords: Differential Gear Box, Fatigue, Life Prediction, Noise, Spiral Bevel Gear, Vibrations

References

[1] Faydor L. Litvin, Alfonso Fuentes, Kenichi Hayasaka, Design, manufacture, stress analysis, and experimental tests of low-noise high endurance spiral bevel gears, Mechanism and Machine Theory 41 (2006) 83–118.

DOI: 10.1016/j.mechmachtheory.2005.03.001

[2] E. Akata , M.T. Altinbalik, Y. Can, Three point load application in single tooth bending fatigue test for evaluation of gear blank manufacturing methods, International Journal of Fatigue 26 (2004) 785–789.

DOI: 10.1016/j.ijfatigue.2003.11.003

[3] G. Gasparini, U. Mariani, C. Gorla, M. Filippini and F. Rosa, Bending Fatigue Tests of Helicopter Case Carburized Gears: Influence of Material, Design and Manufacturing Parameters, Gear Technology (Nov/Dec 2009) 68-76.

[4] Christian Wirth, Bernd-Robert Hohn, ZG- GmbH, Ch. Braykoff, New Methods for the Calculation of the Load Capacity of Bevel and Hypoid Gears, AGMA Technical Paper 12FTM15 (Oct, 2012).

[5] M. V. Chernets, V. V. Bereza, Method for the evaluation of wear and durability of involute conical straight-bevel gears, Materials Science, Vol. 45, No. 4, 2009, 595-604.

DOI: 10.1007/s11003-010-9219-y

[6] Hemanshu D. Joshi, K. D. Kothari, Mode and cause of failure of a Bevel gear-A review, Int. J. Adv Engg and Research Development Volume 1 Issue 2 (March 2014) 1-9.

[7] Sachidananda, H.K., Gonsalvis, Prakash H. R, Rajesh A. R, Design and Development of Power Recirculating Gear Test Rig, CLEAR IJRET Vol-01: No- 01 (Sep-Nov 2011) 66-77.

[8] V. G. Pavlov, Computational Estimation of Wear, Service Life and Efficiency of the Straight Orthogonal Bevel Gear, J. Machinery Mfr and Reliability Vol. 40, No. 5(2011) 443–449.

DOI: 10.3103/s1052618811040133

[9] John Argyris, Alfonso Fuentis, Faydor L. Litvin, Computerized integrated approach for design and stress analysis of spiral bevel gears, Comput. Methods Appl. Mech. Engrg. 191 (2002) 1057-1095.

DOI: 10.1016/s0045-7825(01)00316-4

[10] J. Rontu, G. Szanti, E. Masa, Drive Line Analysis for Tooth Contact Optimization of High Power Spiral Bevel Gears, AGMA Technical Paper 10FTM15 (Oct, 2010).

[11] O. Vogel, A. Griewank, G. Bar, Direct gear tooth contact analysis for hypoid bevel gears, Comput. Methods Appl. Mech. Engrg. 191 (2002) 3965–3982.

DOI: 10.1016/s0045-7825(02)00351-1

[12] DENG Song, HUA Lin, HAN Xing-hui , HUANG Song, Finite element analysis of contact fatigue and bending fatigue of a theoretical assembling straight bevel gear pair, J. Cent. South Univ. (2013) 20: 279–292.

DOI: 10.1007/s11771-013-1486-y

[13] Marina Franulovi, Robert Basan, Robert Kunc, Ivan Prebil, Numerical modeling of life prediction of gears, Procedia Engineering 10 (2011) 562–567.

DOI: 10.1016/j.proeng.2011.04.094

[14] Walter Bartelmus, Gearbox dynamic modeling, J. Theoretical and Applied mechanics 4, 39 (2001) 989-999.

[15] Lisa E. Spievak, Paul A. Wawrzynek, Anthony R. Ingraffea, David G. Lewicki, Simulating fatigue crack growth in spiral bevel gears, Engineering Fracture Mechanics 68 (2001) 53-76.

DOI: 10.1016/s0013-7944(00)00089-8

[16] Yuping Cheng, Teik C. Lim, Dynamics of Hypoid Gear Transmission With Nonlinear Time-Varying Mesh Characteristics, ASME J Mech Design, Vol. 125 (June 2003) 373-382.

DOI: 10.1115/1.1564064