nowadays, due to the increasing power of diesel engines, especially heavy duty diesel engines, and increasing gas pressure inside the combustion chamber, the forces acting on the engine bearings have dramatically raised. on the other hand, becaus eof the competition in the market, it is necessary to increase the engine bearing life and reduce its failure as much as possible. the engine bearings...

The loss of energy due to friction is one the major problems industries are facing nowadays. Friction and wear between sliding components reduce mechanical efficiency machines have a negative impact on environment. In recent years, surface texturing has shown tremendous ability wear. Micro-features generated surfaces act as secondary reservoir for lubricants debris receptacles further abrasion....

Contents 1. Introduction 2. Stress-induced lubricant degradation 3. Basic equations governing the fluid elastohydrodynamic lubrication (EHL) of line and point contacts 3.1. Equations of fluid motion 3.2. Contact surface displacements in line and point lubricated contacts 4. Steady isothermal EHL problems for lightly loaded non-conformal line contacts 5. Steady isothermal EHL problems for heavil...

Abstract Oil-in-water (O/W) emulsions are water-based lubricants and used as fire-resistant hydraulic fluids metalworking (MWFs) in industry. The (elasto-)hydrodynamic film-forming properties of O/W have been studied extensively literature. Typical elastohydrodynamic lubrication (EHL) behaviors revealed at low rolling speeds followed by a starved EHL regime elevated speeds. These self-prepared ...

In order to study the effect of surface roughness on lubrication performance an elastic support water-lubricated tilting pad thrust bearing, a mixed (ML) deterministic model is hereby presented based unified Reynolds equation model. This very incorporates elastic–plastic deformation asperities and polymer matrix pad, as well rubber support. The randomly distributed generated by mathematical sha...

The purpose of this research paper is to examine the tribological characteristics and issues related to journal bearings under boundary and mixed lubrication conditions during shaft startup, shutdown, and low speeds. The key issues and problems related to journal bearings, most notably wear, are discussed as well as the subsequent issues created in the field. The mechanical analysis of the load...

As an important component of large engines, inter-shaft bearing is easily damaged due to its poor working conditions. By analyzing the time–frequency distribution rules fault signals and evolution law micro-faults, failure mechanism can be revealed, monitored in real time prevented advance. For purpose studying faults, a 4-DOF (degree freedom) dynamic model with local defects considering elasto...

Abstract Numerous tribological contacts worldwide rely on adequate lubrication quality for proper functionality. Despite this, there is no existing approach to accurately predict the state of lubrication. The default model since introduced in 1960s—the $$\Lambda$$ ? -ratio, defined as oil film thickness over ...