Investigation on stiffness and damping of transient non-Newtonian thermal elastohydrodynamic point contact for crowned herringbone gears

Xiao, Zeliang; Shi, Xi

doi:10.1016/j.triboint.2019.04.041

Cited by 27 publications

(7 citation statements)

References 30 publications

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“…However, the rotational speed was critical to the transient mixed contact damping. Furthermore, the greater the rotational speed, the smaller the mixed damping, owing to the compression speeds of the transient mixed lubrication increasing with the rotational speed [24].…”

Section: Effect Of Rotational Speedmentioning

confidence: 99%

“…Several techniques have been proposed or adopted to improve this model, such as the differential scheme [11], surface elastic deformation [12,13], surface plastic deformation [14,15], entrainment angle [16,17], and progressive mesh densification (PMD) method [18]. Moreover, the transient squeezing effect of oil film caused by dynamic changes in load, contact geometry, and speed should be considered, such as during startup, shutdown [19,20], and impact [21,22], as well as in various gears [23,24] and cam followers [25,26]. For spiral bevel gears, Pu et al [27] presented a mixed lubrication model considering both the 3D machined roughness and velocity angle between two contact surfaces; based on the numerical simulation results, the friction and flash temperature were further predicted.…”

Section: Introductionmentioning

confidence: 99%

“…However, the studies mentioned above focused on the EHL line contact. Xiao and Shi [24] presented a stiffness and damping model in point contact transient non-Newtonian thermal EHL for crowned herringbone gears, and the effects of the operating conditions and contact parameters on the stiffness and damping of oil films were revealed. Xiao et al [39] introduced oil film stiffness and damping into a dynamic study of spur gears and compared the results obtained with those of the traditional dynamic model; it highlights that the oil film stiffness contributed effectively to alleviation, whereas oil film damping benefitted vibration and frictional heat reduction.…”

Section: Introductionmentioning

confidence: 99%

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Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

Wang

Pei

et al. 2021

Friction

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Existing studies primarily focus on stiffness and damping under full-film lubrication or dry contact conditions. However, most lubricated transmission components operate in the mixed lubrication region, indicating that both the asperity contact and film lubrication exist on the rubbing surfaces. Herein, a novel method is proposed to evaluate the time-varying contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions. This method is sufficiently robust for addressing any mixed lubrication state regardless of the severity of the asperity contact. Based on this method, the transient mixed contact stiffness and damping of spiral bevel gears are investigated systematically. The results show a significant difference between the transient mixed contact stiffness and damping and the results from Hertz (dry) contact. In addition, the roughness significantly changes the contact stiffness and damping, indicating the importance of film lubrication and asperity contact. The transient mixed contact stiffness and damping change significantly along the meshing path from an engaging-in to an engaging-out point, and both of them are affected by the applied torque and rotational speed. In addition, the middle contact path is recommended because of its comprehensive high stiffness and damping, which maintained the stability of spiral bevel gear transmission.

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Section: Effect Of Rotational Speedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

Wang

Pei

et al. 2021

Friction

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“…Zhou et al researched the impact on lubrication performance under the main geometry and working parameters of lubrication performance of a crowned herringbone gear pair [2]. Additionally, taking the crowned herringbone gears as the research object, Xiao and Shi developed models in elastohydrodynamic point contact where were validated by lubrication performance [3]. Jian et al studied the TEHL characteristics of the spur gears system under dynamic load based on a six-degree-of-freedom tribology-dynamics model [4].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Herringbone Gears Based on Thermal Elastohydrodynamic Lubrication Considering Surface Roughness

Chen

et al. 2021

Energies

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To predict the temperature distribution of the tooth surface of a herringbone gear pair, a numerical method for the determination of frictional heat generation was proposed by establishing a thermal elastohydrodynamic lubrication (TEHL) model in the meshing zone taking surface roughness into account. According to the real micro topography of the tooth surface measured by a non-contact optical system and loaded tooth contact analysis, the friction coefficient was obtained by a TEHL analysis and then the heat generation in the contact zone was determined. With the combination of heat generation and heat dissipation analysis, the single tooth model of the herringbone gear pair due to the finite element method (FEM) was proposed and the steady-state temperature distribution of the tooth surfaces was predicted by FEM simulations. The simulation and the experimental results demonstrated good agreement, which verified the feasibility of the present numerical method.

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“…Cui et al [11] built a non-Newtonian TEHL model for point contacts with transverse ridges existing on contacting surface, and observed that the shear-thinning effect of the lubricant is significant and its thermal effect is weakened under the small contact radius. Recently, Xiao and Shi [12] studied the stiffness and damping performances of the point contact TEHL for the crowned herringbone gear based on the Ree-Eyring model, and found that the crown modification can significantly affect the stiffness and damping of the lubrication film.…”

Section: Introductionmentioning

confidence: 99%

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

Meng

Sheng

Cheng³

et al. 2021

Mechanics & Industry

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A non-Newtonian thermal elastohydrodynamic lubrication (TEHL) model for the elliptic contact is established, into which the inertia forces of the lubricant is incorporated. In doing so, the film pressure and film temperature are solved using the associated equations. Meanwhile, the elastic deformation is calculated with the discrete convolution and fast Fourier transform (DC-FFT) method. A film thickness experiment is conducted to validate the TEHL model considering the inertia forces. Further, effects of the inertia forces on the TEHL performances are studied at different operation conditions. The results show that when the inertia forces are considered, the central and minimum film thicknesses increase and film temperature near the inlet increases obviously. Moreover, the inertial solution of the central film thickness is closer to the experimental result compared with its inertialess value.

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Investigation on stiffness and damping of transient non-Newtonian thermal elastohydrodynamic point contact for crowned herringbone gears

Cited by 27 publications

References 30 publications

Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

Thermal Analysis of Herringbone Gears Based on Thermal Elastohydrodynamic Lubrication Considering Surface Roughness

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

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