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Proposing Institution

Lehrstuhl für Maschinenelemente,TUM
Project Manager

Hua Liu
Boltzmannstraße 15
85748 Garching
Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage and to reduce friction during operation. However, dip lubrication and injection lubrication always result in hydraulic gear power losses. Especially in high-speed and dip-lubricated gearboxes with high oil levels, churning losses can represent a significant portion of the total power loss. Current analytical and empirical approaches for examining the churning losses are often limited to certain constraints and operating conditions. Furthermore, they do not provide any information about the oil distribution.CFD (Computational Fluid Dynamics) methods offer a very flexible way to investigate the oil distribution and the churning power losses, with almost no restrictions on the housing shape and operating conditions. In this project, a CFD model based on the Finite Volume Method (FVM) is built to investigate the oil distribution and the churning losses inside a single-stage gearbox of the FZG back-to-back efficiency gear test rig. The focus lies within the investigation of the influences of oil viscosity and immersion depth on the oil distribution and the churning power losses of a single stage spur gear pair.

Impressum, Conny Wendler