Churning power losses of a gearbox with spiral bevel geared transmission. (January 2019)

• Record Type: Journal Article
• Authors: Hu, Xiaozhou; Jiang, Yiyao; Luo, Cheng; Feng, Longfei; Dai, Yu
• Is Part Of: Tribology international. Volume 129(2019)
• Page Start: 398
• Page End: 406
• Publication Date: 2019-01
• Subjects: Churning power losses -- Spiral bevel gear -- Splash lubrication -- Intermediate gearbox; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2018.08.041
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: To predict the churning power losses in a gearbox with spiral bevel geared transmission, based on the Computational Fluid Dynamics (CFD) method, a numerical simulation model for the splash lubrication of the intermediate gearbox of a helicopter including gear box housing, a spiral bevel gear pair and an oil guide device is established and validated by the churning power losses prediction of experiments showing a good agreement. With the model, churning power losses of a gearbox with spiral bevel geared transmission are obtained; influences of gear rotational speed, oil fill level, oil temperature, oil dynamic viscosity, oil density, and tilt angle of the helicopter, on the churning power losses are analyzed. Highlights: CFD calculations of churning power losses of a gearbox with spiral bevel geared transmission are performed. The churning power losses increase with the increase of the rotational speed and the oil fill level of gears The churning power losses increase with the increase of the dynamic viscosity and density of the oil. The influence of the helicopter tilt angle on the churning power losses is small and regular. The present numerical model is validated by experimental results.