You need JavaScript to view this

Gear boxes in wind turbines. Principles for calculation of fatigue under changing loads; Gearkasser i vindturbiner. Principper for beregning af udmattelse ved varierende belastning

Technical Report:

Abstract

This publication deals with calculations of gear boxes in power producing wind turbines connected to the power distribution network.The emphasis is on fatigue calculation for gears and roller bearings according to Palmgren/Miner`s hypothesis. Reference spectra with regard to rotor axis are elucidated. A reference spectrum shows the torque ordered according to its numerical value, with velocity expressed in number of rotations during service life of the construction. Concepts of gear transmissions and calculations of their strength according to DIN 3900 and the Norwegian Veritas are described. For toothed gears it is shown how to determine strain-load spectra on basis of a reference spectrum, and how safety factors S{sub H} for pitting and S{sub F} for tooth fracture should be determined from comparing the stress-load spectra to the stress-fatigue curves.Different calculation methods are discussed, including a derived method for K{sub A }factor determination. For roller bearings the stress-rotational spectra are presented and service life is estimated from these spectra and bearing fatigue value. (EG) (20 refs.)
Authors:
Publication Date:
Oct 01, 1994
Product Type:
Technical Report
Report Number:
EEV-94-01
Reference Number:
SCA: 170602; PA: DK-94:001746; EDB-95:013375; SN: 95001301495
Resource Relation:
Other Information: DN: Cover title: Gearkasser i vindturbiner. Udmattelsesberegning; PBD: Oct 1994
Subject:
17 WIND ENERGY; WIND TURBINES; GEARS; FATIGUE; DESIGN; MECHANICAL TRANSMISSIONS; DYNAMIC LOADS; RELIABILITY; SERVICE LIFE; ROLLER BEARINGS; STRESS ANALYSIS; 170602; TURBINE DESIGN AND OPERATION
OSTI ID:
10105133
Research Organizations:
Danske Elvaerkers Forenings Udredningsafdeling (DEFU), Lyngby (Denmark)
Country of Origin:
Denmark
Language:
Danish
Other Identifying Numbers:
Other: ON: DE95723849; ISBN 87-87927-03-9; TRN: DK9401746
Availability:
OSTI; NTIS
Submitting Site:
DK
Size:
245 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Fisker, J. Gear boxes in wind turbines. Principles for calculation of fatigue under changing loads; Gearkasser i vindturbiner. Principper for beregning af udmattelse ved varierende belastning. Denmark: N. p., 1994. Web.
Fisker, J. Gear boxes in wind turbines. Principles for calculation of fatigue under changing loads; Gearkasser i vindturbiner. Principper for beregning af udmattelse ved varierende belastning. Denmark.
Fisker, J. 1994. "Gear boxes in wind turbines. Principles for calculation of fatigue under changing loads; Gearkasser i vindturbiner. Principper for beregning af udmattelse ved varierende belastning." Denmark.
@misc{etde_10105133,
title = {Gear boxes in wind turbines. Principles for calculation of fatigue under changing loads; Gearkasser i vindturbiner. Principper for beregning af udmattelse ved varierende belastning}
author = {Fisker, J}
abstractNote = {This publication deals with calculations of gear boxes in power producing wind turbines connected to the power distribution network.The emphasis is on fatigue calculation for gears and roller bearings according to Palmgren/Miner`s hypothesis. Reference spectra with regard to rotor axis are elucidated. A reference spectrum shows the torque ordered according to its numerical value, with velocity expressed in number of rotations during service life of the construction. Concepts of gear transmissions and calculations of their strength according to DIN 3900 and the Norwegian Veritas are described. For toothed gears it is shown how to determine strain-load spectra on basis of a reference spectrum, and how safety factors S{sub H} for pitting and S{sub F} for tooth fracture should be determined from comparing the stress-load spectra to the stress-fatigue curves.Different calculation methods are discussed, including a derived method for K{sub A }factor determination. For roller bearings the stress-rotational spectra are presented and service life is estimated from these spectra and bearing fatigue value. (EG) (20 refs.)}
place = {Denmark}
year = {1994}
month = {Oct}
}