Micropitting is a surface fatigue phenomenon on highly loadedcase hardened gear flanks. Main contributors are local stress,surface roughness, sliding speed and lube oil properties. Todetermine the lube oil performance with respect to micropitting,different test methods have been established in the past. Actualproposals are evaluated for adopting suitable calculation methodsfor micropitting resistance to the ISO 6336 gear rating standards.But is micropitting necessarily a damage in any case? Practicalexperience shows, that a certain level of micropitting is actuallyacceptable, leading to even more favorable load distribution andcan end up in a stable flank condition performing without problemsfor the designed service live. The paper describes testing,calculation approaches and application to practical cases withrespect to micropitting on wind turbine and high speed gears andperennial observations and experience.
- Edition:
- 11
- Published:
- 10/01/2011
- Number of Pages:
- 15
- File Size:
- 1 file , 890 KB
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