Results 51 to 60 of about 215 (174)

Multiscale Modelling and Analysis for Design and Development of a High-Precision Aerostatic Bearing Slideway and Its Digital Twin

Machines, 2021
Aerostatic bearing slideways have been increasingly applied in the precision engineering industry and other high-tech sectors over the last two decades or so, due to their considerable advantages over mechanical slideways in terms of high motion accuracy,
Ning Gou, Kai Cheng, Dehong Huo
doaj   +1 more source

Experimental Investigation on Off‐Design Performance of a Small‐Scale Two‐Stage Counter‐Rotating Impulse Turbine

International Journal of Energy Research, Volume 2024, Issue 1, 2024.
The high‐efficiency turbine design is of great importance for small‐scale power systems with a high expansion pressure ratio (EPR). A two‐stage counter‐rotating impulse turbine is optional, with the advantages of a high efficiency and a compact size. However, few experimental investigations were reported.
Ningjian Peng, Enhua Wang, Fanxiao Meng, Wen Zhang, Yongzhen Wang, Bo Zhang, Yuxuan Zhao, Enovic Chansa Yenga Yenga, Naveen Sharma   +8 more
wiley   +1 more source

Experimental and Numerical Dynamic Identification of an Aerostatic Electro-Spindle

Applied Sciences, 2021
This paper proposes a method to experimentally identify the main modal parameters, i.e., natural frequencies and damping ratios, of an aerostatic spindle for printed board circuit drilling. A variety of methods is applied to the impulse-response function
Federico Colombo, Luigi Lentini, Andrea Trivella, Terenziano Raparelli, Vladimir Viktorov   +4 more
doaj   +1 more source

Performance Analysis of Thermal and Surface Roughness Effect of Slider Bearings with Unsteady Fluid Film Lubricant Using Finite Element Method

Journal of Applied Mathematics, Volume 2024, Issue 1, 2024.
The streamline upwind Petrov‐Galerkin (SUPG) finite element method was used in this study to investigate the thermal and surface roughness effects on an inclined slider bearing with an unsteady fluid film. One‐dimensional transverse and longitudinal surface roughness models were considered with the supposition that roughness is stochastic and has a ...
Girma Desu Tessema, Getachew Adamu Derese, Awoke Andargie Tiruneh, Qiankun Song   +3 more
wiley   +1 more source

Research on Design and Optimization of Micro-Hole Aerostatic Bearing in Vacuum Environment

Lubricants
Micro-hole aerostatic bearings are important components in micro-low-gravity simulation of aerospace equipment, and the accuracy of micro-low-gravity simulation tests is affected by them.
Guozhen Fan, Youhua Li, Yuehua Li, Libin Zang, Ming Zhao, Zhanxin Li, Hechun Yu, Jialiang Xu, Hongfei Liang, Guoqing Zhang, Weijie Hou   +10 more
doaj   +1 more source

Bearing Performance Analysis of the Thermal and Surface Roughness Effects by Finite Element Method on Slider Bearings Through Non‐Newtonian Fluid‐Type Lubricant

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
The finite element method was used in this study to explore the impact of surface roughness and thermal characteristics on slider bearings with non‐Newtonian power‐law fluid flow lubricant. One‐dimensional transverse and longitudinal surface roughness models were considered under the stochastic assumption that roughness has a Gaussian random ...
Girma Desu Tessema, Getachew Adamu Derese, Awoke Andargie Tiruneh, Marco Pizzarelli   +3 more
wiley   +1 more source

The Squeeze Film Effect with a High-Pressure Boundary in Aerostatic Bearings

Mathematics, 2023
The squeeze film effect was discussed in several fields, but mostly under the same pressure boundary conditions. However, pressures at the inlet and outlet are different for aerostatic bearings.
Yangong Wu, Jiadai Xue, Zheng Qiao, Wentao Chen, Bo Wang   +4 more
doaj   +1 more source

Design and Analysis of an Aerostatic Pad Controlled by a Diaphragm Valve

Lubricants, 2021
Because of their distinctive characteristics, aerostatic bearings are particularly suitable for high-precision applications. However, because of the compressibility of the lubricant, this kind of bearing is characterized by low relative stiffness and ...
Federico Colombo, Luigi Lentini, Terenziano Raparelli, Andrea Trivella, Vladimir Viktorov   +4 more
doaj   +1 more source

Effect of Pressure Equalization Groove Structure on Static Characteristics of Aerostatic Bearings [PDF]

Journal of Applied Fluid Mechanics
In order to improve the load capacity and stiffness, the pressure-equalizing groove is introduced into the structure of aerostatic bearing, which can optimize the mechanics characteristics.
C. Yuanqi, X. Yaping, L. Weining, G. Ning   +3 more
doaj   +1 more source

Theoretical and Numerical Investigations on Static Characteristics of Aerostatic Porous Journal Bearings

Machines, 2022
To investigate the static characteristics of aerostatic journal bearings with porous bushing, the flow model—in which the compressibility of lubricating gas is considered—is established based on the Reynolds lubrication equation, Darcy equation for ...
Yandong Gu, Jinwu Cheng, Chaojie Xie, Longyu Li, Changgeng Zheng   +4 more
doaj   +1 more source