A Model for the Prediction of Churning Losses in Geared Transmissions—Preliminary Results

Journal of Mechanical Design, Transactions Of the ASME - Tập 129 Số 1 - Trang 128-133 - 2007
Christophe Changenet1, Philippe Velex2
1Mechanical Engineering Department, ECAM, Lyon, France
2LaMCoS, UMR CNRS 5514, INSA de Lyon, France

Tóm tắt

A series of formulas are presented which enable accurate predictions of churning losses for one pinion characteristic of automotive transmission geometry. The results are based on dimensional analysis and have been experimentally validated over a wide range of speeds, gear geometries, lubricants, and immersion depths. The case of a pinion-gear pair in mesh has been considered, and it has been proved that, depending on the sense of rotation, the superposition of the individual losses of the pinion and of the gear leads to erroneous figures. A new formula devoted to a pinion and gear rotating anticlockwise has been derived and validated by comparison with experimental evidence.

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Tài liệu tham khảo

Daily, Chamber Dimension Effects on Induced Flow and Frictional Resistance of Enclosed Rotating Disk, ASME J. Basic Eng., 82, 217, 10.1115/1.3662532

Mann, Friction Drag on Bladed Disks in Housings as a Function of Reynolds Number, Axial and Radial Clearance and Blade Aspect Ratio and Solidity, ASME J. Basic Eng., 83, 719, 10.1115/1.3662307

Soo, Laminar Flow Over an Enclosed Rotating Disk, Trans. ASME, 80, 287, 10.1115/1.4012346

Blok, Les Températures de Surface Dans les Conditions de Graissage Sous Extrême Pression, Proc. 2nd Congrès mondial du Pétrole, 471

Niemann, The Measurement of Surface Temperature on Gear Teeth, ASME J. Basic Eng., 11, 641

Terekhov, Hydraulic Losses in Gearboxes With Oil Immersion, Vestnik Mashinostroeniya, 55, 13

Lauster, Zum Wärmehaushalt mechanischer Schaltgetriebe für Nutzfahrzeuge, VDI-Ber., 488, 45

Boness, Churning Losses of Discs and Gears Running Partially Submerged in Oil, Proc. ASME Int. Power Trans. Gearing Conf., 355

Diab, Windage Losses in High-Speed Gears. Preliminary Experimental and Theoretical Results, ASME J. Mech. Des., 126, 903, 10.1115/1.1767815

Candel, Mécanique des Fluides—Cours, 2nd ed., 151

Changenet, Power Loss Predictions in Geared Transmissions Using Thermal Networks—Applications to a Six-Speed Manual Gearbox, ASME J. Mech. Des., 128, 618, 10.1115/1.2181601

Changenet, C. , 2006, “Modélisation du Comportement Thermique des Transmissions par Engrenages,” PhD. thesis, Institut National des Sciences Appliquées de Lyon, pp. 70–75.

Diab, Experimental and Numerical Investigations on the Air Pumping Phenomenon in High Speed Spur and Helical Gears, Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci., 219, 785, 10.1243/095440605X31652