Method for estimating traction curves under practical operating conditions

Itagaki, Hideyuki; Ohama, Kazumasa; Rajan, Aravindh Nammalvar Raja

doi:10.1016/j.triboint.2019.02.047

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…Akehurst (Akehurst et al, 2005) figured out that spin would generate shear stress (different from the expected traction direction) in the lubricant film, resulting in power loss and the local temperature rising. Based on creep theory, Hirofumi Itagaki (Itagaki et al, 2020) proposed a modified method to estimate traction curves and found that the traction drive coefficient would reduce with spin increasing. Li X. M (Jiang et al, 2008;Li et al, 2010) analyzed the elastohydrodynamic lubrication contact with spin considered.…”

Section: Introductionmentioning

confidence: 99%

Adaptive loading ball traction drive reducer: modeling and efficiency performance

Luo

Wang

Jiang

et al. 2021

JAMDSM

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In this paper, a novel type of adaptive loading ball traction drive reducer (AL-BTDR) is proposed and investigated in modeling and efficiency performance. A combination of power flow and equal linear velocity method is developed to evaluate the speed ratio for the first time. Meanwhile, the spin loss at contact areas is also analyzed based on the Hertz contact theory, and a new approach depended on power flow is introduced to establish the efficiency model. By applying the efficiency model, the performance of efficiency with different output torque is calculated, and the distinctions under adaptive loading and constant loading are investigated. The results show that AL-BTDR has an excellent efficiency performance under adaptive loading with a maximum of 91%. Additionally, efficiency is higher under adaptive loading and will not sharply drop when compared with constant loading.

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Section: Introductionmentioning

confidence: 99%

Adaptive loading ball traction drive reducer: modeling and efficiency performance

Luo

Wang

Jiang

et al. 2021

JAMDSM

View full text Add to dashboard Cite

show abstract

“…Furthermore, numerical convergence problems still exist. Therefore, simplified and rapid EHL traction calculation methods for engineering purpose have been proposed [27][28][29][30][31]. Few of them use independently measured rheological properties and/or compared results with measured traction curves quantitatively over a wide range of running conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the temperature gradient and the viscosity variation across the film are seldom modelled in simplified traction calculations. The EHL film is often treated as a single layer of uniform temperature (and uniform viscosity across the film) as for the isothermal problem [27][28][29][30][31]. This limits the accuracy of the prediction for the maximum temperature rise and the friction coefficient.…”

Section: Introductionmentioning

confidence: 99%