Influence of lubricant properties and temperature on the scuffing failure of FZG gears

• Type: Article in International Conference Proceedings Book
• Date: 1999

Authors

castro, j (Author) Other; seabra, j (Author) FEUP

Conference proceedings International

Title: LUBRICATION AT THE FRONTIER: THE ROLE OF THE INTERFACE AND SURFACE LAYERS IN THE THIN FILM AND BOUNDARY REGIME

Pages: 655-664

25th Leeds-Lyon Symposium on Tribology

LYON, FRANCE, SEP 08-11, 1998

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 1 Citation

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-001-6FW

DOI: 345650688,12,1

Abstract (EN): The analysis of experimental scuffing results of FZG gears lubricated with mineral paraffinic base oils, with different viscosities, showed the relevance of friction power dissipation in gear scuffing, represented by the produce of traction coefficient by hertzien pressure and sliding speed. This scuffing criteria called FPI, in the same way as other criteria, is strongly dependent on the traction coefficient. It's application, with several well known traction coefficient expressions, describes particularly well the experimental results, in what concerns scuffing load and sliding speed variations, but they are insufficient when comparing different lubricants or different test temperatures. In this work a traction coefficient for FZG type A gears is defined, based on FPI scuffing criteria and scuffing experimental results, involving kinematic viscosity and the specific mass of the lubricant. The lubricant film thickness is also relevant in gear scuffing, and in this work, a possible relation between friction power dissipation and critical film thickness in scuffing conditions is presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6