... negative pressure zone (RNPZ) was found in the spiral groove gas face seal, and the evolution and action mechanism of RNPZ was investigated in detail, which may promote the above application. Three film thicknesses of spiral groove gas face seals at different rotational speeds and inlet pressures were...

.... Based on the flow conserving governing equations, this paper originally presents semi-empirical analytic equations of the leakage flow rate and tooth-clearance pressure for liquid-phase flow in the straight-through labyrinth seal. The equations indicate that the leakage and pressure are closely related...

...T. V. V. L. N. Rao In this paper, pressure and shear stress are derived under steady state using one-dimensional analysis of the single-grooved slider bearing and journal bearing with partial slip on the stationary surface. The Reynolds boundary conditions are used in the analysis of journal...

...Shuyu Zhang; Sung-Chang Lee; Dongman Kim; Joerg Ferber; Brian Strom; George Tyndall Thermomechanical actuation (TMA) at the transducer region of the air bearing surface (ABS) protrudes from the transducer toward the recording media. This actuation induces a change in the air bearing pressure...

...Shuyu Zhang; Brian Strom; Sung-Chang Lee; George Tyndall For a hard disk drive operating in a humid environment, the water vapor in the slider’s air bearing is typically compressed beyond its saturation vapor pressure, causing the vapor to condense. Consequently, the air bearing pressure decreases...

... one. The wear after more than 2000 cycles was measured and used to generate numerical simulations. The aim here was to compare experimental data with theoretical results. It was observed that hydrodynamic pressure increases, whereas the temperature at the film/bush interface slightly decreases on both...

...S. B. Glavatskih; Michel Fillon Results of a combined theoretical and experimental investigation into the operation of thrust bearings with polytetrafluoroethylene (PTFE)-faced pads are reported. Bearing performance is analyzed in terms of temperature, power loss, oil film thickness and pressure...

...M. Bahrami; M. M. Yovanovich; J. R. Culham A new model is developed that considers the effect of roughness on the elastic contact of spherical bodies. A general pressure distribution is proposed that encompasses the contact of rough spheres and yields the Hertzian theory for ideally smooth surfaces...

...A. V. Olver , 19 03 2003 mechanical contact pressure numerical analysis iterative methods inverse problems convergence The article by Tanaka describes a rapid and accurate method for the determination of contact pressure in the Hertz elliptical contact problem, without...

...Mathieu Helene; Mihai Arghir; Jean Frene The present work investigates the flow in the feeding recess of a hybrid journal bearing. Numerical integration of the complete Navier-Stokes equations was performed with an appropriate turbulence model. Of primary concern is the pressure field...

..., and the magnitudes of tension achievable through different methods were compared. The use of viscosity data from liquids under tension to more accurately determine the initial pressure viscosity coefficient was investigated. The continuity of the pressure viscosity coefficient across absolute zero pressure...

...Mathieu Helene; Mihai Arghir; Jean Frene The present work is a parametric study of the pressure pattern in a two-dimensional recess of a hybrid journal bearing (HJB). It is known that theoretical models of HJB are largely dependent on the recess pressure pattern especially for severe working...

... of the pressure and film thickness distributions in the contact area are discussed for the two stages of shut down process, namely the deceleration stage and the subsequent pure squeeze motion stage with zero entraining velocity. The nature of the balance between the pressure, the wedge and the squeeze terms...

... of seals for aircraft actuation assemblies in a broad range of temperatures (−55°C to +135°C) and sealed pressures (1–50 MPa or more). The model is used to calculate the contact pressures and film thickness maps as well as the leakage rates and friction for the dynamic or static contact between a seal...

... transition was attributable not to the wear-out of the silver plating, but to the increase of the contact pressure with increase of the number of oscillations, which was caused by the increase of sliding pair shape inconformity due to wear. Some sliding electric contact mechanisms have a structure...

...C. F. Kettleborough confined flow compressible flow flow simulation pressure force size effect mechanical engineering computing computational fluid dynamics When two circular discs are supplied with air under pressure through a central hole, the lower disc will be attracted...

...M. Groper; I. Etsion, Fellow ASME An experimentally observed reverse flow phenomenon at the end tip of the cavitation zone of a submerged journal bearing is modeled and theoretically investigated. The shape of the cavity, the nature of the reverse flow and the pressure distribution in the bearing...

...M. Kaneta; R. Kawashima; S. Masuda; H. Nishikawa; P. Yang; J. Wang The effects of thermal conductivity and kinematics of contacting surfaces and viscosity-pressure coefficient on the film thickness in an elliptical contact under pure sliding conditions in which lubricant entrainment vector...

...S. Coulon,; F. Ville, and; A. A. Lubrecht Using a dry point contact model, a parametric study of the peak pressure due to a dent was performed. The parameters varied were the dent depth and diameter. The numerical analysis ws complemented by an analytical analysis. Using the elastic body hypothesis...

... which took account of non-uniform variations in the fluid film thickness. A solution procedure was devised whereby for a given set of adjustment conditions, simultaneously converged fields of fluid film thickness, temperature, viscosity and pressure would result, together with oil film forces. A wide...