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Title: Gearbox Instrumentation for the Investigation of Bearing Axial Cracking

Abstract

Failures in gearbox bearings have been the primary source of reliability issues for wind turbine drivetrains, leading to costly downtime and unplanned maintenance. The most common failure mode is attributed to so-called axial cracks or white-etching cracks, which primarily affect the intermediate and high-speed-stage bearings. The high-speed-shaft and bearing loads and sliding will be measured with a specially instrumented gearbox installed in a 1.5-megawatt turbine at the National Wind Technology Center in an upcoming test campaign. Additional instrumentation will also measure the tribological environment of these bearings, including bearing temperatures, lubricant temperature and water content, air temperature and humidity, and stray electrical current across the bearings. This paper fully describes the instrumentation package and summarizes initial results.

Authors:
 [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1430825
Report Number(s):
NREL/TP-5000-70639
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; wind energy; gearbox; drivetrain; bearing axial cracking; high-speed shaft; NWTC

Citation Formats

Keller, Jonathan A., and Lambert, Scott R. Gearbox Instrumentation for the Investigation of Bearing Axial Cracking. United States: N. p., 2018. Web. doi:10.2172/1430825.
Keller, Jonathan A., & Lambert, Scott R. Gearbox Instrumentation for the Investigation of Bearing Axial Cracking. United States. doi:10.2172/1430825.
Keller, Jonathan A., and Lambert, Scott R. Tue . "Gearbox Instrumentation for the Investigation of Bearing Axial Cracking". United States. doi:10.2172/1430825. https://www.osti.gov/servlets/purl/1430825.
@article{osti_1430825,
title = {Gearbox Instrumentation for the Investigation of Bearing Axial Cracking},
author = {Keller, Jonathan A. and Lambert, Scott R.},
abstractNote = {Failures in gearbox bearings have been the primary source of reliability issues for wind turbine drivetrains, leading to costly downtime and unplanned maintenance. The most common failure mode is attributed to so-called axial cracks or white-etching cracks, which primarily affect the intermediate and high-speed-stage bearings. The high-speed-shaft and bearing loads and sliding will be measured with a specially instrumented gearbox installed in a 1.5-megawatt turbine at the National Wind Technology Center in an upcoming test campaign. Additional instrumentation will also measure the tribological environment of these bearings, including bearing temperatures, lubricant temperature and water content, air temperature and humidity, and stray electrical current across the bearings. This paper fully describes the instrumentation package and summarizes initial results.},
doi = {10.2172/1430825},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {3}
}

Technical Report:

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