The bending and contact stress analysis of spur gears

• Autorzy: Marciniec A. , Pawlowicz A.
• Języki publikacji: EN

Abstrakty

EN

With the developing of science and technology the use of gears has become more common in all the upcoming industries. Accessory units used in aircraft provide the power for hydraulic, pneumatic and electrical systems in addition to providing various pumps and control systems for efficient engine operation. The design of an effective and reliable gearing system is governed, amongst other factors, by its ability to withstand high root bending stress (RBS) and surface contact stress(SCS). A number of authors have utilized thefmite element method to predict RBS and SCS in gears. This paper presents the utilization of a three-dimensional (3D), finite element method (FEM) to conduct RBS and SCS calculations of a pair ofspur gears. Firstly a pair of parallel spur gears without errors and tooth modifications is defined in a CAD system. Then, MES analysis is conducted. Using FEM to calculate the RBS the load is applied as a force to the tip of the gear, it is modeled as a linear force uniformly distributed along the face width and perpendicular to the tooth surface. The SCS is considered as nonlinear contact analysis, where the contact of the pair of gears is assumed on teeth flanks. The tooth RBS and SCS of the same pair of gears are calculated and presented. Gears with wrought alloy steel are considered. The results are compared with the ISO standards, Levis formula and Hertz equation. The analysis was made for applied moment equal: 600[Nm], 1200[Nm] and 1600[Nm]. It was found that the calculated results are comparable. Finally, an example of calculating a pair of spur gears is given in the paper.

Słowa kluczowe

EN

spur gear; FEM; contact stress; bending stress

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2009
• Tom: Vol. 16, No. 3
• Strony: 243--250
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Marciniec A.

autor

Pawlowicz A.

• Rzeszów University of Technology Powstańców Warszawy 8, 35-959 Rzeszów, Poland tel.:[phone], fax: [phone],

Bibliografia

• 1] Cananau, S., 3D contact stress analysis for spur gears, National Tribology Conference, pp. 1221-4590, 2003.
• [2] Conrado, E., Davoli, P., The ”true” bending stress is spur gears, Gear Technology, 8, 2007.
• [3] International Standard ISO 6336/1, Calculation of load capacity of spur and helical gears – Part 1: basic principle, introduction and general influence factors, pp. 1–100, 1993.
• [4] International Standard ISO 6336/2, Calculation of load capacity of spur and helical gears – Part 2: calculation of surface durability (pitting), pp. 1–28, 1993.
• [5] International Standard ISO 6336/3, Calculation of load capacity of spur and helical gears – Part 3: Calculation of tooth strength, pp. 1–72, 1993.
• [6] Kawalec, A., Wiktor, J., Comparative Analysis of Tooth-Root Strength Using ISO and AGMA Standards in Spur and Helical Gears With FEM-based Verification, Journal of Mechanical Design, Vol. 128, 2006.
• [7] Kiełbasa, J., Stańco, K., Konstrukcja walcowej przekładni wichrowej o zazębieniu wewnetrznym, materiały XXIII Sympozjum Podstaw Konstrukcji Maszyn Rzeszów –Przemyśl, 2007.
• [8] Sfakiotakis, V. G., Vaitsis, J., P., Anifantis, N., K., Numerical simulation of conjugate spur gear action, Computers and Structures, 79, pp. 1153-1160, 2001.
• [9] Shuting, L., Finite element analyses for contact strength and bending strength of a pair of spur gears with machining errors, assembly errors and tooth modifications, Mechanism and Machine Theory, pp. 88-114, 42, 2007.