Background: Under severe operating conditions, such as lubricant contamination, elevated temperatures and high unit loads, the hydrodynamic (HD) lubrication condition in a HD bearing may degrade and be reduced to mixed and boundary lubrication conditions, which traditional pad bearing materials (Babbitt metal) are not able to sustain. For example, Electrical Submersible Pump (ESP) systems are r...

This paper presents simulation results corresponding with the theoretical Morton effect model explained in Part I, where the 3D finite element models of bearing, shaft, and fluid film are adopted. In addition, it explains how thermal bow induced imbalance force develops in the spinning journal with time and how the vibration level is affected by the thermal bow vector. Shaft asymmetric thermal ...

This paper proposes mathematical modeling and analysis of ferrofluid lubricated newly designed slider bearing having convex pad (surface or plate) stator with two porous layers attached to the slider. The problem considers the effect of slip velocity proposed by Sparrow et. al.[1] and modified by Shah et. al.[2] at the film-porous interface. The squeeze velocity V=−which appears when the upper ...

Abstract The report considers two variants of a building with special purpose the roof slab. Option 1 is model - without helicopter pad, and 2 has pad. For basic structural elements, values of: displacements, shear forces load-bearing reinforcements are shown. Specialized software for computational models used. Combinations impacts proposed, including dynamic loading. solutions options compared...

The thrust bearing, as the only part bearing axial load, is extremely important in vertical hydroelectric generating units. Its working condition directly affects safe and reliable operation of unit. However, during operation, oil film easily damaged under influence complex factors. Installation deviation a key point that can cause temperature pressure changes film, affecting force on bearing. ...

In tilting-pad journal bearings (TPJB), power loss corresponds to the internal friction in shearing of oil. Besides lubrication gap, intermediate spaces between pads account for a notable amount frictional losses. Against background increasing demands efficiency and sustainable use resources, reduction takes key position further development bearings. our research, we compare two bearing concept...

The present study aimed to assess the effect of replacing copper as a multi-functional ingredient in the brake pad material with potassium titanate platelet (PTP) and a particular type of ceramic fiber (CF) copper-free composite. Chase dynamometer tests were conducted to compare a brake padchr('39')s tribological behavior when PTP and CF are added to the composition with that of the copper-bear...