Performance of textured spherical thrust hybrid bearing operating with shear thinning and piezoviscous lubricants

Abstract

Improving the lubricating performance of tribo-pairs using engineering textured surfaces has been the main focus of tribology research in recent years. The use of a suitably designed micro-texture on the bearing surface may have a beneficial effect on the performance of fluid film bearings. In the present paper, a mathematical model of a hybrid spherical thrust bearing is developed considering the effect of shear thinning and piezoviscous behaviour of a lubricant. The modified Reynolds equation for a hybrid spherical thrust bearing configuration together with a restrictor flow equation for a capillary restrictor is solved using a finite-element method. In this work, the effect of various micro-textures shapes (spherical, circular, conical and square) and non-Newtonian lubricant behaviour having shear thinning and piezoviscous effects are analysed. The numerically simulated result shows a strong dependence on the combined effect of shear thinning and piezoviscous lubricant behaviour and a chosen geometric shape of a texture. The frictional power loss is seen to reduce nearly by 24.05%, and the stiffness gets enhanced by 11.08%.

Influence of Percolation effect of additives on the Performance of Conical Textured Porous Hybrid Journal Bearing

“…Figure 5(a) presents the variation of dimple radius against radial loading W r of textured HCPJB S for fixed value of micro-dimple depth. 31,36,41,73,75 It is seen that the W r value reduces monotonically as micro-dimple radius increases. Also, in Figure 5(b), the effect of dimple depth on W r of textured HCPJB S is shown.…”

Performance analysis of columnar convex-concave compound microtexture thrust bearing

“…Figure 2(c) shows the expansion diagram of the composite microtexture thrust bearing. Many references (Gropper et al , 2018; Agrawal and Sharma, 2022; Ji et al , 2021) show that the design of local microtexture is approximately equivalent to the principle of the Reyleigh stepped structure, and it can improve bearing lubrication performance, while full microtexture will reduce bearing lubrication performance.…”

“…Brizmer et al (2004) conducted an experimental study on the tribological properties of laser surface texture parallel thrust bearings, indicating that appropriate local texture can effectively reduce the friction coefficient of thrust bearings by more than 50%. Agrawal and Sharma (2022) analyzed the effect of microtexture shapes (spherical, circular, conical and square) on the performance of hybrid spherical thrust bearings and showed that frictional power loss was reduced and stiffness enhanced.…”

Simulation study on the performance of gap oil film lubrication under extreme working conditions of micro‐textured hydrostatic support

“…Chen et al 5 numerically studied the effects of texture shape and texture parameters on the performance of hydrostatic bearings in four cases: non‐textured, square, spherical, and composite texture. Agrawal 6 analysed the effects of various micro‐textured shapes (spherical, circular, conical, and square) and non‐Newtonian lubricants on the performance of hybrid ceramic spherical thrust bearings. Kumar 7 studied the effect of micro‐textures of different shapes on the performance of tapered hybrid journal bearings.…”