Oil Film Stiffness of Double Involute Gears Based on Thermal EHL Theory

Zhang

2022

ILT

Self Cite

Purpose The purpose of this paper is to study the lubrication characteristics of double involute gear (DIG), compare its lubrication differences under quasi-static and tribo-dynamic conditions and study the influence of different factors on its lubrication characteristics under the tribo-dynamic condition. Design/methodology/approach According to the meshing characteristics of DIG and elastohydrodynamic lubrication (EHL) theory, a tribo-dynamic model of DIG is established based on the “subsection method.” The Runge-Kutta method and the multigrid method are integrated to solve the model, and the dynamic analytical model of lubricating oil is established in the iterative solution. Findings The load and the transmission error fluctuate obviously under the tribo-dynamic condition, which is not conducive to the lubrication of DIG. The influence of rotational speeds and torque on the lubrication properties of DIG has obvious differences under tribo-dynamic and quasi-static conditions. Originality/value This research can provide a theoretical basis for improving the lubrication performance, reducing the loss of mechanical efficiency and improving the bearing capacity and service life of DIG.

“…, and the dynamic oil film stiffness is obtained in the decoupling calculation of tribodynamic model (Yin et al, 2021c).…”

Section: Tribo-dynamic Model Of Double Involute Gearmentioning

confidence: 99%

“…The detailed calculation parameters appearing in the above formulas can be found in Yin et al (2021aYin et al ( , 2021b.…”

Section: Governing Equation Of Thermal Elastohydrodynamic Lubrication...mentioning

confidence: 99%

Lubrication characteristics of double involute gears under the tribo-dynamic condition

Zhang

2022

ILT

Self Cite

Study on Surface Adhesive Wear and Wear Life of Double Involute Gears Under Mixed Elastohydrodynamic Lubrication

Fan

2022

Journal of Tribology

To slow down the surface wear process of double involute gears (DIG), the surface adhesive wear model and wear life prediction model are established according to its meshing characteristics, combined with the modified Archard wear model and mixed EHL model. This paper studies the surface wear and wear life of DIG, compares it with common involute gears (CIG), and discusses the influence of different factors on its surface wear. Results show that the adhesive wear distribution of DIG is similar to that of CIG. Properly reducing l* and increasing y* can reduce surface wear and prolong wear life. The reasonable selection of lubrication states and working conditions can beneficial to enhance its tooth surface wear resistance.

Research on Tribo-Dynamic Characteristics of Double Involute Gears Based on Multiphysics Coupling

Yang

Jun

et al. 2022

Journal of Tribology

In order to accurately obtain the dynamic characteristics of double involute gears, according to the characteristics of its tooth profile, the idea of &quot;subsection method&quot; is proposed to establish a novel tribo-dynamic model by the coupling relationship between thermal effect, lubrication characteristics and dynamic characteristics. In the process of iterative solution of the model, an analytical model of lubricant film deformation is established and a time-varying meshing stiffness calculation model considering the coupling effects of multiple factors is established. The influence of different factors on its dynamic behaviors and the difference of dynamic characteristics between double involute gears (DIGs) and common involute gears (CIGs) are comparative analyzed. The results show that the thermal effect and tooth friction can intensify the dynamic response of the gear transmission. The change of rotational velocity and torque have significant impact on the dynamic behaviors of DIGs, the variation of tooth waist order parameters have little effect on its dynamic characteristics, and the dynamic characteristics between DIGs and CIGs exist difference, but the difference is not obvious. Additionally, the theoretical model is verified through experiments.