Calculation and Analysis of Gears in MW Wind Turbine Gearbox

Abstract

Gearbox was a key component of wind turbine but with the highest failure rate, so it was necessary to analyze its safety and reliability. In this paper, gears in MW wind turbine gearbox were analyzed by nonlinear finite element contact analysis method. The changing regularity of the stress was found as tooth mesh, and it was proved to be reliable by comparing with the result of theoretical calculations. The maximum contact stress existed on the second engaged tooth as well as the vicinity of the pitch circle of gears. The stress concentration phenomena occurred at the tooth root fillet which caused the main failure form of gears.

Reliability analysis of wind power gearbox based on fault tree and monte carlo simulation

“…Among such a large-scale wind power generation unit, the gearbox is an important speed-increasing component susceptible to internal component failures after long-term operation. Relevant data also shows that the failure rate of gearboxes in wind power generation units is relatively high, which leads to a long downtime [1]. Therefore, reliability analysis of the gearbox is very necessary to improve the overall service life of wind power generation units [2].…”