Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This presentation details how wind turbine gearboxes fail to meet 20-year design life and how the Gearbox Reliability Collaborative (GRC) is addressing the challenges.
Gearbox Reliability Collaborative Experimental Data Overview & Analysis (Presentation).
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This presentation details how wind turbine gearboxes fail to meet 20-year design life and how the Gearbox Reliability Collaborative (GRC) is addressing the challenges.
Gearbox Reliability Collaborative Experimental Data Overview & Analysis
Author: NREL Gearbox Reliability Collaborative Experimental Data Overview and Analysis
Author: Francisco OyaguePublisher:
ISBN:
Category : Gearing
Languages : en
Pages : 11
Book Description
Most turbines in the market today follow a modular configuration comprised of a main shaft, gearbox, high speed shaft, and generator. The gearbox has the important task of increasing the slow rotor speeds to meet the electromechanical requirements of the electromechanical. These gearboxes are commonly composed of a planetary stage and several parallel shaft stages. The planetary, or epicyclical, design of the gearbox is a feature of the design that has many advantages compared to the traditional parallel shaft arrangement. Among these are that higher gear ratios can be achieved in a single stage, they are capable to carrying higher loads, and they require less space than the traditional parallel shaft arrangement. For this reason, planetary gearboxes they are commonly used in the first stage of the wind turbine gearboxes. However, planetary stages are more complex than the typical parallel shaft arrangement, and can be affected by deflection in the planet carrier, annulus deformations and bearing clearances. Unanticipated levels of these motions can reduce their life expectancy. This paper gives a brief overview of a subset of the experimental efforts, data, and analysis of the GRC project focusing on the planet carrier deformation.
Gearbox Reliability Collaborative - Phase 1 and 2 Overview (Presentation)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The presentation given at the Wind Turbine Reliability Workshop at Sandia National Laboratories, August 2-3, 2011, serves as an overview for the findings from the Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 Testing.
Gearbox Reliability Collaborative Update
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 17
Book Description
This presentation is an update on the Gearbox Reliability Collaborative (GRC) for the AWEA Wind Project Operations, Maintenance & Reliability Seminar. GRC accomplishments are: (1) Failure database software deployed - partners see business value for themselves and customers; (2) Designed, built, instrumented, and tested two gearboxes - (a) Generated unprecedented public domain test data from both field testing and dynamometer testing, (b) Different responses from 'identical' gearboxes, (c) Demonstrated importance of non-torque loading and modeling approach; and (3) Active collaborative, with wide industry support, leveraging DOE funding - Modeling round robin and Condition Monitoring round robin.
Gearbox Reliability Collaborative
Author: Hal LinkGearbox Reliability Collaborative Update (Presentation).
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 23
Book Description
Understand and isolate sources of gearbox failures; Improve understanding of internal loads and response; Normal operation and transients; Improve analysis tools to accurately simulate response; Improve ability to reproduce field response in dyno testing; Evaluate how CM augments design and O and M.
Gearbox Reliability Collaborative Phase 3 Gearbox 2 Test Report
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Many gearboxes in wind turbines have not been achieving their expected design life; however, they commonly meet or exceed the design criteria specified in current standards in the gear, bearing, and wind turbine industry as well as third-party certification criteria. The cost of gearbox replacements and rebuilds, as well as the downtime associated with these failures, has elevated the cost of wind energy. The National Renewable Energy Laboratory (NREL) Gearbox Reliability Collaborative (GRC) was established by the U.S. Department of Energy in 2006; its key goal is to understand the root causes of premature gearbox failures and improve their reliability. The GRC uses a combined gearbox testing, modeling, and analysis approach disseminating data and results to the industry and facilitating improvement of gearbox reliability. This test report describes the recent tests of GRC gearbox 2 in the National Wind Technology Center dynamometer and documents any modifications to the original test plan. In this manner, it serves as a guide to interpret the publicly released data sets with brief analyses to illustrate the data.
Gearbox Reliability Collaborative Phase 3 Gearbox 3 Test Report
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Many gearboxes in wind turbines do not achieve their expected design life; they do, however, commonly meet or exceed the design criteria specified in current standards in the gear, bearing, and wind turbine industry as well as third-party certification criteria. The cost of gearbox replacements and rebuilds, as well as the downtime associated with these failures, increases the cost of wind energy. In 2007, the U.S. Department of Energy established the National Renewable Energy Laboratory (NREL) Gearbox Reliability Collaborative (GRC). Its goals are to understand the root causes of premature gearbox failures and to improve their reliability. The GRC is examining a hypothesis that the gap between design-estimated and actual wind turbine gearbox reliability is caused by underestimation of loads, inaccurate design tools, the absence of critical elements in the design process, or insufficient testing. This report describes the recently completed tests of GRC Gearbox 3 in the National Wind Technology Center dynamometer and documents any modifications to the original test plan. In this manner, it serves as a guide for interpreting the publicly released data sets with brief analyses to illustrate the data. The primary test objective was to measure the planetary load-sharing characteristics in the same conditions as the original GRC gearbox design. If the measured load-sharing characteristics are close to the design model, the projected improvement in planetary section fatigue life and the efficacy of preloaded TRBs in mitigating the planetary bearing fatigue failure mode will have been demonstrated. Detailed analysis of that test objective will be presented in subsequent publications.
Author: Shuangwen Sheng