Efficiency Analysis of Shifted Spur Gear Transmissions
A quasi-static analysis of a shifted spur gear transmission is presented in this work. With this study, the influence of the profile modifications and the dissipative effects on the efficiency is assessed. Among the dissipative effects, friction between teeth in presence of lubricant is studied in this work, because of its important effect on power losses in the operating conditions used. Friction forces have been implemented by means of a Coulomb’s model with a variable friction coefficient (VFC). One VFC formulation have been developed derived from the well-known Niemann formulation and compared with a second one developed by Hai Xu. The final aim is to assess the impact on the efficiency of both the frictional effect and the profile shifting.
KeywordsEfficiency Power losses Friction coefficient Load sharing Sliding velocity
The authors would like to acknowledge the COST ACTION TU 1105 for supporting this research.
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