Power Losses of Gear Systems

Stavytskyy, Valeriy; Башта, Олександр Васильович; Носко, Павло Леонідович; Boyko, Grygory; Golovin, Andry; Stebeletska, Natalia

doi:10.18372/0370-2197.4(77).12136

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Depending on the application, drag losses are thus calculated using either a windage model or a churning one. For example, Stavytskyy et al [1] and more recently Concli and Gorla [2] have listed both gear windage and churning losses models. Additional information on windage losses can be found in the gear windage review proposed by Eastwick and Johnson [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations About the Power Loss Transition Between Churning and Windage for Spur Gears

Quiban

Changenet

Marchesse

et al. 2020

Journal of Tribology

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Oil sump lubrication is commonly used in gearboxes. When considering consistent speeds, oil immersion is usually set to low level in order to reduce associated power losses. This configuration is already used in some parts of helicopter mechanical transmissions and it is under consideration as a lubrication solution for future electric powertrain where gearbox input speeds may be very high. The gear drag power losses are generally evaluated from either a churning power loss model for classic oil sump lubrication or a windage power loss model for oil jet lubrication. One may thus wonder how to estimate drag losses when considering a gear that only a small part is immersed. In this study the authors investigate the transition between churning and windage phenomena for a spur gear. A series of torque measurements on a single spur gear rotating in an oil bath at numerous oil immersion levels have been carried out. Based on these results a criterion to indicate which power loss model to use is proposed.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations About the Power Loss Transition Between Churning and Windage for Spur Gears

Quiban

Changenet

Marchesse

et al. 2020

Journal of Tribology

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“…Gear windage losses denote no-load resistances between rotating gears and the oil-air mixture. Normally, these losses hold small proportions of the total, and can be just influential in aero engine applications [17]. Townsend [18] outlines two analytical models considering rotational speeds and different geometric gear parameters.…”

Section: Gear No-load Lossesmentioning

confidence: 99%

Energy loss and efficiency investigations of a dual clutch transmission based on adaptive experiment and analytical simulation

Liu,

Dave,

Rinderknecht

2024

Forsch Ingenieurwes

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Energy transfer improvement and energy consumption reduction are getting more crucial in the automotive sector. As one of the essential elements directly influencing energy transfer in the powertrain system, transmission losses have been widely analyzed with both simulation and experimental approaches. For a better characterization of individual losses, this paper investigates and compares most of the available analytical models for further system implementation. Regarding laboratory experiments, an adaptive sampling strategy is presented and analyzed for various operating conditions. Compared to the traditional factorial design, the applied Gaussian Process Regression (GPR) delivers both estimations and their predictive variances in the entire experiment process. Besides, new measurement candidates can be determined with the prior information from GPR model. The analytical simulation and adaptive measurement are employed to investigate a seven-speed transmission. With both approaches, a detailed discussion about total transmission losses and individual loss mechanisms are performed under various operating conditions.

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Power Losses of Gear Systems

Cited by 2 publications

References 11 publications

Experimental Investigations About the Power Loss Transition Between Churning and Windage for Spur Gears

Experimental Investigations About the Power Loss Transition Between Churning and Windage for Spur Gears

Energy loss and efficiency investigations of a dual clutch transmission based on adaptive experiment and analytical simulation

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