Modeling of reaction film failure in gear lubrication

✍ Scribed by Q.Y Jiang; G.C Barber

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 143 KB
• Volume: 231
• Category: Article
• ISSN: 0043-1648
• DOI: 10.1016/s0043-1648(99)00114-3

✦ Synopsis

From a survey of the literature it has been found that the commonly used P-V curve for predicting scuffing of gears can have a characteristic parabolic shape which has a minimum value at moderate sliding velocities. Previously, there has not been a theory which could explain this trend. A combined model for reaction film failure is presented in this paper, which accounts for mechanical wear and chemical decomposition failure mechanisms in terms of different pitch line speed in gear lubrication. Quantitative formulae are proposed for both failure mechanisms. This combined model fits well with published experimental results which indicate that the scuffing load varies with gear speed as an approximate second power polynomial function, providing an explanation for the high-low-high variation of scuffing load with the speed of gears.