A computerized method for loaded tooth contact analysis of high-contact-ratio spur gears with or without flank modification considering tip corner contact and shaft misalignment.pdfVIP

Mechanism and Machine Theory 97 (2016) 190–214 Contents lists available at ScienceDirect Mechanism and Machine Theory journal homepage: /locate/mechmt A computerized method for loaded tooth contact analysis of high-contact-ratio spur gears with or without ?ank modi?cation considering tip corner contact and shaft misalignment Siang-Yu Ye, Shyi-Jeng Tsai ? Department of Mechanical Engineering, National Central University, No. 300, Zhong-Da Rd., Zhong-Li District, Tao-Yuan City 32001, Taiwan article info Article history: Received 10 May 2015 Received in revised form 14 September 2015 Accepted 15 November 2015 Available online 7 December 2015 Keywords: High-contact-ratio spur gears Loaded tooth contact analysis Tip corner contact Shaft misalignment abstract High-contact-ratio (HCR) spur gears have the advantages of reducing the acting loads on the teeth, as well as noise and vibration. However, the phenomenon of tip corner contact and the in?uence of shaft misalignments can cause unexpected damage and vibration. Flank modi?cation is a solution for these in?uences. An ef?cient computerized tool for loaded tooth contact analysis (LTCA) is proposed in this paper that can be used to design HCR gears, while taking into consideration the conditions of tip corner contact and shaft misalignment. The LTCA method is developed based on the in?uence coef?cient method and considers both the deformation of the loaded teeth and the twist deformation of the shaft. The variations of the shared loads and contact stress of a HCR spur gear pair with lead crowning and relieved pro?les are analyzed considering the in?uence of the amount of shaft misalignment and relief. The contact patterns as well as the stress distribution on the engaged ?anks in various cases are also simulated. ? 2015 Elsevier Ltd. All rights reserved. 1. Introduction Increased demand for less vibration and noise in gear transmission has led to a focusing of attention on the development of different design concepts. One