Journal ArticleDOI
Influence of tooth profile and oil formulation on gear power loss
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TLDR
In this paper, the power losses reduction is obtained using two different approaches: using lower modulus helical gears and significant positive profiles shifts and using gear oil formulations with different base oils.About:
This article is published in Tribology International.The article was published on 2010-10-01. It has received 59 citations till now. The article focuses on the topics: Gear oil.read more
Citations
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Influence of the addendum modification on spur gear efficiency
TL;DR: In this paper, the authors analyze gear efficiency through two different approaches for friction coefficient calculation along the line of action in order to evaluate the possible differences in terms of gear teeth optimization and find out the best behavior about load capacity, safety against wear, noise and vibration.
Journal ArticleDOI
Gearbox power loss. Part II: Friction losses in gears
TL;DR: In this article, the authors presented an extensive campaign of experimental tests in an FZG test rig and an average coefficient of friction between meshing gears was devised from the experimental results.
Journal ArticleDOI
Multi-objective spur gear pair optimization focused on volume and efficiency
TL;DR: In this article, a genetic algorithm was used for conducting a multi-objective optimization of gear pair parameters with a goal of reducing the transmission volume and power losses, and the resulting formula was included in the genetic algorithm as an objective.
Journal ArticleDOI
Friction torque of thrust ball bearings lubricated with wind turbine gear oils
TL;DR: In this article, a modified four-ball machine was used to assemble the thrust ball bearing and the tests were performed at velocities ranging between 150 and 1500 rpm, and the results for the operating temperatures and for the internal friction torque were presented.
Journal ArticleDOI
Friction torque of cylindrical roller thrust bearings lubricated with wind turbine gear oils
TL;DR: In this paper, a cylindrical roller thrust bearing was analyzed and a modified four-ball machine was used to assemble the bearing and the results for the operating temperatures and for the internal friction torque were presented.
References
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Journal ArticleDOI
A Model for the Prediction of Churning Losses in Geared Transmissions—Preliminary Results
TL;DR: In this article, a series of formulas are presented which enable accurate predictions of churning losses for one pinion characteristic of automotive transmission geometry and have been experimentally validated over a wide range of speeds, gear geometries, lubricants, and immersion depths.
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Influence of oil temperature on gear failures
TL;DR: In this article, the influence of oil temperature on gear failure modes, as well as their introduction into load carrying capacity calculation methods are shown. But the often-applied practice of increasing the severity of a gear oil test method by increasing the oil temperature has to be revised.
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Friction coefficient in FZG gears lubricated with industrial gear oils : Biodegradable ester vs. mineral oil
TL;DR: In this paper, two industrial gear oils, a reference paraffinic mineral oil with a special additive package for extra protection against micropitting and a biodegradable non-toxic ester, were characterized in terms of their physical properties, wear properties and chemical contents and compared in their power dissipation in gear applications.
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Viscosity–pressure–temperature behaviour of mineral and synthetic oils
TL;DR: A new high-pressure viscometer that can measure viscosity at pressures up to 8 GPa has been developed in the authors' laboratory as discussed by the authors, and the modulus equation has been used to compare the behaviour of mineral and synthetic lubricants.
Journal ArticleDOI
Gear power loss performance of biodegradable low-toxicity ester-based oils
TL;DR: In this paper, the power loss performance of two biodegradable, low toxicity, ester-based gear oils was evaluated and compared with a commercial mineral oil and an ester based fluid containing zinc dialkyl dithio phosphate (ZDDP) additives.