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Sources of Time-varying Contact Stress and Misalignments in Wind Turbine Planetary Sets by A. Crowther; V. Ramakrishnan; N. A. Zaidi; Chris Halse is a Engineering article available to read on EtoBox.

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## Abstract Recent data shows that 90% of large wind turbines include a gearbox, and industry forecasts expect this figure to remain relatively stable. With global annual volumes (2009) of around 18,600 units, the quality, cost and performance of gearboxes is of paramount importance to the wind sector. The industry has been focusing some attention on gearbox reliability, as demonstrated by a growth in the number of specific seminars and collaborative programs on this topic. One aspect that needs to be brought to an industry‐wide forum is the understanding of the complexity of bearing design in the gearbox and the careful attention that needs to be paid to ensure a reliable gearbox design. This paper seeks to address this issue by clear demonstration of design issues using a model of the gearbox from the National Renewable Energy Lab's Gearbox Reliability Collaborative. Detailed models are presented with focus on determining the quality of the function of the planetary gear stages. Key design drivers are discussed such as the quality of alignment at the gears and bearings and the loads and stresses seen on these components. Under a design load case with a significant rotor off‐axis

Who reads Sources of Time-varying Contact Stress and Misalignments in Wind Turbine Planetary Sets?

Author

A. Crowther; V. Ramakrishnan; N. A. Zaidi; Chris Halse

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1095-4244)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)