Power losses at low speed in a gearbox lubricated with wind turbine gear oils with special focus on churning losses

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Pedro M T Marques (Author) Other; Ramiro C Martins (Author) FEUP; Jorge H O Seabra (Author) FEUP

Journal

Title: Tribology International

Vol. 62

Pages: 186-197

ISSN: 0301-679X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 16 Citations

Scopus - 23 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-005-0FH

DOI: 10.1016/j.triboint.2013.02.026

Abstract (EN): In this study gear oils were tested for power loss behaviour in a two stage multiplying gearbox, on a back-to-back test rig with recirculating power. The tests were performed at low input speeds and high input torques with oil sump temperature set free. A power loss model simulating the power loss mechanisms was implemented to evaluate gear power losses, but failed to correctly describe the gear churning. Two lubricant flow regimes were identified, which are related to the nature of the fluid circulation, as well as with the gearbox case. A calibration method for the gear churning loss is proposed based on these results and a method to identify the transition between the fluid flow regimes inside the gearbox.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12