Normal and tangential oil film stiffness of modified spur gear with non-Newtonian elastohydrodynamic lubrication

Zhou, Changjiang; Xiao, Zeliang; Chen, Siyu; Han, Xu

doi:10.1016/j.triboint.2016.12.045

Cited by 64 publications

(33 citation statements)

References 27 publications

(33 reference statements)

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“…In EHL contact, the stiffness of oil film between mating gear pair is defined as 16 where k f is the oil film stiffness and B is the face width equal to the length of the contact line of two meshing gear teeth that is perpendicular to the x direction. 1,13 Δ is the increment symbol.…”

Section: Tribological and Thermal Propertiesmentioning

confidence: 99%

Tribological and thermal properties of a crowned gear pair with high-speed and heavy-load in thermal micro-elastohydrodynamic lubrication

Xiao

Shi

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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The oil film stiffness, temperature rise of oil film, flash temperature and frictional loss ratio of a crowned gear pair with non-Newtonian transient thermal elastohydrodynamic lubrication of rough surfaces in high-speed and heavy-load operating conditions are investigated. The pressure, film thickness, coefficient of friction and temperature rise are calculated along the action line of spur gears to verify the validity of full numerical solution. Subsequently, the effects of high-speed, heavy-load and roughness on those tribological and thermal properties of a crowned gear drive are discussed. The results show that in high-speed, heavy-load and rough surface contact, the crown modification is in favor of stability improvement of gear drive due to smoother curve of oil film stiffness. The temperature rise of the oil film and flash temperature on tooth surface are quite high which are prone to result in gear scuffing. Moreover, small flash temperature and frictional loss ratio occur in the domains near the start of active profile and the tip due to the effect of crown modification.

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Section: Tribological and Thermal Propertiesmentioning

confidence: 99%

Tribological and thermal properties of a crowned gear pair with high-speed and heavy-load in thermal micro-elastohydrodynamic lubrication

Xiao

Shi

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Add formula (9) and formula (10) to (1) and to (4), and the dimensionless elastohydrodynamic lubrication control equation can be obtained.…”

Section: Nondimensionalize Equationsmentioning

confidence: 99%

“…The impacts of the input torque, surface roughness, and lubricant temperature on the gear contact fatigue under tribodynamic condition were also investigated. Zhou et al established a new normal stiffness model of oil film by viscous-elastic fluid between a spur gear drive equivalent and a massless spring element and proposed a tangential stiffness model according to the hypothesis of equal shear stress on laminar element surfaces [4]. It indicated that the rational parameter match is valid in mesh impact reduction and stationarity enhancement.…”

Section: Introductionmentioning

confidence: 99%

Elastohydrodynamic Lubrication Characteristics of Spiral Bevel Gear Subjected to Shot Peening Treatment

Zhang

Jin

et al. 2018

Mathematical Problems in Engineering

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High speed and heavy load put forward demanding requirements for the bending strength of spiral bevel gear. Shot peening, as a technological method, can greatly improve the bending strength of gear. During shot peening, a large number of subtle projectiles bombard the tooth surface of spiral bevel gear at an extremely high speed, which makes the latter produce plastic deformation and strengthened layer. Serving as the bombarded target, spiral bevel gear inevitably leads to the change of tooth surfaces microstructure. This paper aims at revealing the coupling law between microstructure and lubrication characteristics and establishing a reasonable model that can describe the tooth surface microstructure of shot peened spiral bevel gear. Besides, this paper brings insight into the lubrication characteristics of shot peened spiral bevel gears. Based on the elastohydrodynamic lubrication (EHL) theory, a comparative research on tooth surface lubrication characteristics has been conducted by various microscopic morphologies in this study.

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“…They showed that the use of non-standard pinion and gear of unequal tooth thickness could aid in reducing the wear damage. Zhou et al [29] investigated the normal and tangential oil film stiffness of modified spur gears with non-Newtonian elastohydrodynamic lubrication. They revealed that the modification was valid for inhibiting the jump of oil film stiffness and improving the gear wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the wear of spur gears generated by modified cutter

et al. 2020

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Tooth surface wear damage is one of the main causes of gearing system failure. Excessive wear leads to tooth profile loss and an increase in transmission errors, as the worn gear surfaces are no longer conjugate. Thus, the enhancement of gear durability against wear is important for gear application. Recent works show that cutter modification can aid in reducing the tool wear in gear processing, while the wear performance of the gears produced by modified cutters is still unknown. Therefore, this study focuses on the wear performance of the gear generated by modified cutter. Numerical results show that the wear resistance can be enhanced through proper cutter modification.

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Normal and tangential oil film stiffness of modified spur gear with non-Newtonian elastohydrodynamic lubrication

Cited by 64 publications

References 27 publications

Tribological and thermal properties of a crowned gear pair with high-speed and heavy-load in thermal micro-elastohydrodynamic lubrication

Tribological and thermal properties of a crowned gear pair with high-speed and heavy-load in thermal micro-elastohydrodynamic lubrication

Elastohydrodynamic Lubrication Characteristics of Spiral Bevel Gear Subjected to Shot Peening Treatment

Investigation on the wear of spur gears generated by modified cutter

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