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Title: Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing: Preprint

Abstract

This computational work investigates planetary gear load sharing of three-mount suspension wind turbine gearboxes. A three dimensional multibody dynamic model is established, including gravity, bending moments, fluctuating mesh stiffness, nonlinear tooth contact, and bearing clearance. A flexible main shaft, planetary carrier, housing, and gear shafts are modeled using reduced degrees-of-freedomthrough modal compensation. This drivetrain model is validated against the experimental data of Gearbox Reliability Collaborative for gearbox internal loads. Planet load sharing is a combined effect of gravity, bending moment, bearing clearance, and input torque. Influences of each of these parameters and their combined effects on the resulting planet load sharing are investigated. Bendingmoments and gravity induce fundamental excitations in the rotating carrier frame, which can increase gearbox internal loads and disturb load sharing. Clearance in carrier bearings reduces the bearing load carrying capacity and thus the bending moment from the rotor can be transmitted into gear meshes. With bearing clearance, the bending moment can cause tooth micropitting and can induce planetbearing fatigue, leading to reduced gearbox life. Planet bearings are susceptible to skidding at low input torque.

Authors:
; ;
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:
1050766
Report Number(s):
NREL/CP-5000-55968
TRN: US201218%%1539
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the American Gear Manufacturers Association; (AGMA) Fall Technical Meeting, 28-30 October 2012, Dearborn, Michigan
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; BEARINGS; BENDING; CAPACITY; CARRIERS; CLEARANCE; COMPUTERIZED SIMULATION; DEGREES OF FREEDOM; DYNAMICS; FATIGUE; FLEXIBILITY; GEARS; MANUFACTURERS; MEETINGS; RELIABILITY; ROTORS; SUSPENSIONS; THREE-DIMENSIONAL CALCULATIONS; TORQUE; WIND TURBINES; wind turbine; load sharing; non-torque load

Citation Formats

Guo, Yi, Keller, Jonathan, and LaCava, William. Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing: Preprint. United States: N. p., 2012. Web.
Guo, Yi, Keller, Jonathan, & LaCava, William. Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing: Preprint. United States.
Guo, Yi, Keller, Jonathan, and LaCava, William. Sat . "Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing: Preprint". United States. https://www.osti.gov/servlets/purl/1050766.
@article{osti_1050766,
title = {Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing: Preprint},
author = {Guo, Yi and Keller, Jonathan and LaCava, William},
abstractNote = {This computational work investigates planetary gear load sharing of three-mount suspension wind turbine gearboxes. A three dimensional multibody dynamic model is established, including gravity, bending moments, fluctuating mesh stiffness, nonlinear tooth contact, and bearing clearance. A flexible main shaft, planetary carrier, housing, and gear shafts are modeled using reduced degrees-of-freedomthrough modal compensation. This drivetrain model is validated against the experimental data of Gearbox Reliability Collaborative for gearbox internal loads. Planet load sharing is a combined effect of gravity, bending moment, bearing clearance, and input torque. Influences of each of these parameters and their combined effects on the resulting planet load sharing are investigated. Bendingmoments and gravity induce fundamental excitations in the rotating carrier frame, which can increase gearbox internal loads and disturb load sharing. Clearance in carrier bearings reduces the bearing load carrying capacity and thus the bending moment from the rotor can be transmitted into gear meshes. With bearing clearance, the bending moment can cause tooth micropitting and can induce planetbearing fatigue, leading to reduced gearbox life. Planet bearings are susceptible to skidding at low input torque.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {9}
}

Conference:
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