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Gearbox Reliability Collaborative All Members Meeting

The Gearbox Reliability Collaborative (GRC) All Members Meeting was held on February 17–18, 2015. The meeting covered advancements made across the NREL GRC project and the latest industry updates on gearbox reliability and operations and maintenance practices. The presentations covered gearbox design updates, gearbox testing updates, experimental data analysis, and operations and maintenance research.


Tuesday, February 17

Time Presenter Organization Presentation
DOE-Related Testing and Modeling Session
9:00 a.m. Carsten Westergaard
Jon Keller
A2e Reliability Focus Area
  Yi Guo NREL Gearbox Modeling Practice Summary and Recommendations
  Latha Sethuraman NREL Gearbox 2 High Speed Shaft and Bearing Loads Analysis
  Don Houser Ohio State University Gearbox 2 HSS Torque Ripple
  Zhiwei Zhang
Travis Histed
Romax Technology Gearbox 2 Data Analysis
12:00 p.m. Jon Keller NREL Gearbox 3 Manufacturing Status
DOE-Related Testing and Modeling Session (Continued)
1:00 p.m. Brian McNiff
Jon Keller
GRC1.5 Status and Plans
  Ryan Schkoda Clemson Clemson University: Facility Update, First Test Campaign, and Ongoing Activities
Reliability Theory Session
2:00 p.m. Bob Errichello GEARTECH Evolution of Wind Turbine Gearbox Planet Bearing Design
  Erv Zaretsky NASA Ret. Bearing and Gearing System Life and Reliability—A Tutorial
  Brent Reardon
Doug Guthrie
AGMA Wind Turbine Gearbox Committee Update and Reliability Calculation
  Rob Budny RBB Engineering Reliability Theory and Its Application to Wind Turbine Gearboxes

Wednesday, February 18

Time Presenter Organization Presentation
Bearing Failure Modes and Micropitting Session
8:30 a.m. Vern Wedeven Wedeven Associates Micropitting Fundamentals and Performance Relevant Testing
  Don Houser Ohio State University Testing to Evaluate the ISO 15144 Micropitting Technical Report
  Ksenija Topolovec Miklozic
Jon Leather
Water Effect on Micropitting in Wind Turbine Gearbox Bearings
  Tim Krantz NASA On the Correlation of Specific Film Thickness and Gear Pitting Life
  Rick Brooks Timken Main Shaft Failure Modes and Enhancements
Condition Monitoring Field Experience Session
1:00 p.m. Jack Poley CMI ASTM D7917-14, A New Standard for Online Sensors for Ferrous Wear Debris Particle Detection
  Shawn Sheng NREL Wind Turbine Condition Monitoring, Reliability Database and O&M Research Update
  Nick Brown Vestas Field Experiences with Condition Monitoring
  Rich Wurzbach MRG Labs Wind Turbine Grease Sampling and Analysis
  Ashley Crowther Romax Technology Condition Monitoring and Predictive Maintenance in Practice
  Dave Clark CMS Wind Condition Monitoring Myths And Mistakes
  Adam Johs EDPR CMS Retrofits—An Operator’s Experience