A thermal finite line contact EHL model of a helical gear pair

A thermal elastohydrodynamic lubrication (TEHL) finite line contact model is developed for a helical gear pair lubricated with an Eyring fluid or a power-law fluid in order to investigate the effects of the working conditions. A lubrication analysis within a meshing period shows that the differences between the Eyring and Newtonian solutions mainly lie in the film temperature and the shear stress. For the power-law fluid, the power index n has a significant effect on the film thickness. The effects of load and speed on lubrication performance along the line of action are discussed.

Download Full-text

A finite line contact tribo-dynamic model of a spur gear pair

Tribology International ◽

10.1016/j.triboint.2017.12.010 ◽

2018 ◽

Vol 119 ◽

pp. 753-765 ◽

Cited By ~ 15

Author(s):

Tiancheng Ouyang ◽

Haozhong Huang ◽

Xiaorong Zhou ◽

Mingzhang Pan ◽

Nan Chen ◽

...

Keyword(s):

Dynamic Model ◽

Spur Gear ◽

Gear Pair ◽

Line Contact ◽

Finite Line Contact ◽

Finite Line

Download Full-text

Analytical Method on Contact Stress of Helical Gear with Asymmetric Involutes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.321.157 ◽

2011 ◽

Vol 321 ◽

pp. 157-160 ◽

Cited By ~ 1

Author(s):

Ning Li ◽

Wei Li ◽

Ning Liu ◽

Hua Gang Liu

Keyword(s):

Contact Stress ◽

Contact Line ◽

Side Surface ◽

Helical Gear ◽

Gear Pair ◽

Line Contact ◽

Contact Lines ◽

Large Pressure ◽

Helical Gear Pair ◽

Meshing Process

Helical gear with asymmetric involutes is a new kind gear which driving side surface is large pressure angle profile. The numbers of meshing tooth are discussed during helical gear pair meshing process, thus the length of total contact lines is determined easily. It is difficult to calculate contact stress by existing formula because this kind gear is non-standard. A calculating formula is derived which can calculate contact stress of helical gear with asymmetric involutes in this paper. A computer’s software is written in order to calculate instantaneous contact stress of contact line. Contact stress is compared between symmetric helical gear and asymmetric helical gear.

Download Full-text

Rotational Vibration of a Helical Gear Pair with Modified Tooth Surfaces. 1st Report. Modified Tooth Surface and its Equivalent Tooth Profile.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.57.3634 ◽

1991 ◽

Vol 57 (543) ◽

pp. 3634-3639

Author(s):

Sho HONDA

Keyword(s):

Helical Gear ◽

Tooth Profile ◽

Tooth Surface ◽

Gear Pair ◽

Rotational Vibration ◽

Tooth Surfaces ◽

Helical Gear Pair

Download Full-text

Vibration-based fault diagnosis of helical gear pair with tooth surface wear considering time-varying friction coefficient under mixed EHL condition

Journal of Tribology ◽

10.1115/1.4052941 ◽

2021 ◽

pp. 1-16

Author(s):

Siyu Wang ◽

Rupeng Zhu

Keyword(s):

Dynamic Response ◽

Hydrodynamic Lubrication ◽

Helical Gear ◽

Calculation Model ◽

Tooth Surface ◽

Time Varying ◽

Gear Pair ◽

Surface Wear ◽

Mesh Stiffness ◽

Helical Gear Pair

Abstract Based on “slice method”, the improved time-varying mesh stiffness (TVMS) calculation model of helical gear pair with tooth surface wear is proposed, in which the effect of friction force that obtained under mixed elasto-hydrodynamic lubrication (EHL) is considered in the model. Based on the improved TVMS calculation model, the dynamic model of helical gear system is established, then the influence of tooth wear parameters on the dynamic response is studied. The results illustrate that the varying reduction extents of mesh stiffness along tooth profile under tooth surface wear, in addition, the dynamic response in time-domain and frequency-domain present significant decline in amplitude under deteriorating wear condition.

Download Full-text