The development of special grease makes it possible for angular contact ball bearings to operate at high speed and temperature, so, become necessary investigate thermal-fluid characteristics inside high-speed bearing lubricated with grease. In this paper, a simulation model was established CFD software Fluent, the heat-fluid-solid coupling method used analyze distribution flow grease, heat tran...

Abstract This paper presents a novel approach to accurately simulate the dynamic characteristics of rack and pinion lifting mechanism while accounting for coupling effect meshing tooth pair stiffness grease in real-world environments. A structure-grease model is established based on deformation coordination conditions meshing. The incorporates term time-varying pinion. By analyzing combined com...

Three different laminated composites are used in this study: carbon fiber, woven glass and glass-fiber-reinforced epoxy. The composite laminate structures were fabricated using the hand lay-up technique at room temperature. laminates reinforced with epoxy resin, fibers (CFRP), (GFRP-W), random-orientation (GFRP-R) to obtain eight layers. wear test was performed a pin-on-disc tribometer five loa...

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 A common application for grease-lubricated oscillating rolling element bearings is, e.g., rotor blade in wind turbines. These mainly operate under conditions that are prone to starvation. If the grease is unable provide enough inlet lubricant supply contact between and bearing raceway, wear form of False Brinelling thus premature failure possible. Bearing experiments with different lit...

The extreme pressure (EP) behavior of grease is related to its additives that can prevent seizure. However, in this study following ASTM D2596 four-ball test method, the EP greases was modified without any changes additive package. A tester with position encoders and variable frequency drive system used control speed ramp up time or delay motor demonstrate higher weld load lower friction were f...