Improved calculation method for load-dependent gear losses

Improved calculation of load-dependent gear losses by consideration of so far disregarded influences

“…In terms of the geometrically based influence factor, the previous results of Jurkschat et al. 13 recommend the use of a local gear loss factor H VL , for example, according to Wimmer. 12 In terms of the tribologically based influence factor, the use of the mean coefficient of friction µ mz |686 13 across the area of contact of gears based on precise measured data and the evaluation method according to Doleschel 16 is favorable for practical applications.…”

“…In Jurkschat et al., 13 the authors have carried out systematic and comprehensive experimental investigations at the FZG efficiency test rig to study the load-dependent gear losses of spur and helical gears with and without flank corrections. The local gear loss factor H VL was calculated according to Wimmer.…”

“…The results of Jurkschat et al. 13 were focused on gears with well-balanced ratios of specific sliding on tooth root and tooth tip. Previous investigations with unbalanced ratios of Michaelis 14 showed significant differences of the mean coefficient of friction, depending on whether the high specific sliding was at the beginning or at the end of the gear mesh.…”

“…Also, the influence of the change of transverse contact ratio under load on the gear loss factor was not considered by the authors in Jurkschat et al. 13 The elastic deformation of the gear tooth under load was extensively investigated by Thoma, 15 for example. The change of contact ratio under load, however, was not incorporated in any established gear loss factor calculation known to the authors.…”

“…The calculation method of the authors in Jurkschat et al. 13 is extended by these influences and improved.…”