Prediction of Power Losses Due to Tooth Friction in Gears

Diab, Yasser; Ville, Fabrice; Velex, Philippe

doi:10.1080/05698190600614874

Cited by 76 publications

(61 citation statements)

References 9 publications

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“…Xu et al proposed a model which combines a gear load distribution model, a friction coefficient model and a mechanical efficiency formulation to predict the instantaneous mechanical efficiency of a gear pair, and a friction coefficient formula was obtained through a multiple linear regression analysis [19]. Ville et al proposed a traction law of gears through an EHL simulator with consideration of tooth friction [20], and results showed that tooth friction can strongly affect dynamic transmissibility through bearing mounts. Later Ville et al proposed a formulation for tooth friction losses in internal gears, including the effect of tooth profile modifications [21] by using the developed analytical approach [22].…”

Section: Introductionmentioning

confidence: 99%

Coefficient of friction of a starved lubricated spur gear pair

et al. 2016

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The frictional power loss issue of gear pairs becomes an important concern in both industry and academia due to the requirement of the energy saving and the improvement of power density of gear drives. A thermal starved elastohydrodynamic lubrication model is developed to study the tribological performance of a spur gear pair under starved lubrication conditions. The contact pressure, the film thickness, the temperature rise, the frictional power loss, as well as the coefficient of friction are evaluated by considering the variation of the curvature radius, the sliding/rolling motion, and the load distribution of gear tooth within the meshing period. Effects of lubrication starvation condition, load and speed on the coefficient of friction are studied.

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Section: Introductionmentioning

confidence: 99%

Coefficient of friction of a starved lubricated spur gear pair

et al. 2016

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“…These sliding loss ratios can be calculated from Eq.(4). Equation (8) shows that the sliding loss ratio of the double-teeth meshing is equal to the average value between the sliding loss ratios of both tooth pairs meshing at that time. The plot of the total sliding loss along with meshing position is shown in Fig.5(b).…”

Section: The Total Sliding Loss Of a Spur Gear Pairmentioning

confidence: 99%

“…To solve these restrictions, there are some researches tried to determine the friction coefficient base on EHL model (7), (8) . Estimation of the power loss by using the friction coefficient based on EHL method seems to give the satisfy results, however due to the complicated calculation that requires long computational time, the method base on EHL model is not suitable for practical implementation.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Sliding Loss in a Parallel-Axis Gear Pair

Ratanasumawong

Asawapichayachot

Phongsupasamit

et al. 2012

JAMDSM

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The meshing model and the method used for estimation of sliding loss in a parallel-axis gear pair are presented. First the sliding loss model for single tooth meshing spur gear is constructed. The sliding loss is attributed to the deviation in direction of force from the line of action due to friction. Afterwards the sliding loss of a helical gear pair is considered. The helical gear is modeled as the multi-section spur gears aligned slantwise along with base helix angle. Thus the sliding loss of each section can be considered as same as the loss of the spur gear pair. Then the total sliding loss is estimated by combining the losses of all sections together. To verify the method, the estimated results were compared with the experimental results and estimated results done by the other researchers. The estimated results agree with the experimental results. The sliding loss increases with loads and speeds. The gear with larger module has higher sliding loss. Increasing the helix angle, the sliding loss will be increased, but increasing the transverse pressure angle the sliding loss will be decreased. Various empirical formulae of friction coefficient are used in this paper, and the accuracies of various formulae are shown.

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“…Another method is the use of Elastohydrodynamic Lubricant (EHL) model to determine the accurate friction coefficient. The samples of researches in this group are the works of Xu et al [11] and Diab et al [12]. Although the method base on the EHL model seems to give the satisfy results, it consumes large computational time and is still not suitable for practical application.…”

Section: Introductionmentioning

confidence: 99%

Spur and Helical Gear Sliding Loss Model with Load Distribution Pattern on Gear Tooth Surface

Ponchai¹,

Phraeknanthoe²,

Ratanasumawong³

2018

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Abstract.The model for estimation of spur and helical gear sliding loss with load distribution pattern on gear tooth surface is presented in this paper. The load distribution for the spur gear is considered to distribute uniformly along the line of contact. During double teeth meshing, load sharing ratio between meshing teeth is considered to be 33:67 percent or 45:55 percent. For the helical gear the load distribution can be calculated by the method proposed by Niemann and Richter. The contour plots of load distribution on gear tooth surface conform to the tooth contact patterns obtained experimentally. The sliding losses estimated from the presented method are compared with the estimations done by the former model and also the experimental results. It is found that the sliding losses calculated from the presented method are closer to the experimental results than the estimations from the former model. The effects of the helix angle and pressure angle on the sliding loss can also be estimated correctly by the presented method.

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Prediction of Power Losses Due to Tooth Friction in Gears

Cited by 76 publications

References 9 publications

Coefficient of friction of a starved lubricated spur gear pair

Coefficient of friction of a starved lubricated spur gear pair

Estimation of Sliding Loss in a Parallel-Axis Gear Pair

Spur and Helical Gear Sliding Loss Model with Load Distribution Pattern on Gear Tooth Surface

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