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.)
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}
}
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}
}