Results 1 to 10 of about 5,635 (264)

Development of a Simulation System with Integrated In Situ Monitoring Capabilities for the Lubrication State of Rolling Elements in Space Control Moment Gyro Bearings

Lubricants
As a core actuator for attitude control in spacecraft, the lubrication state of the bearing rolling elements in the Control Moment Gyro (CMG) critically determines the operational lifetime and control accuracy of the overall assembly.
Zhaoliang Dou, Zhuangzhuang Du, Saihang Zhou, Gang Zhou, Shaohua Zhang, Lu Gao, Ye Yang, Fengbin Liu   +7 more
doaj   +1 more source

Research progress and development trends of low-friction drilling fluid for shale gas

Dizhi lixue xuebao
Objective  Shale gas is an important unconventional natural gas resource in China, boasting significant potential reserves. Deep shale gas reservoirs generally have specific geological characteristics, such as low porosity and permeability, strong ...
SUN Jinsheng, CAI Wenhui, WANG Jintang, LYU Kaihe, ZHAO Ke, ZHANG Junhao   +5 more
doaj   +1 more source

Role Of Computational Simulations In The Design Of Piston Rings

Journal of Middle European Construction and Design of Cars, 2015
The paper presents computational approaches using modern strategies for a dynamic piston ring solution as a fluid structural problem. Computational model outputs can be used to understand design parameter influences on defined results of a primarily ...
Novotný Pavel, Raffai Peter, Dlugoš Jozef, Maršálek Ondřej, Knotek Jiří   +4 more
doaj   +1 more source

Thermomechanical Fatigue Life Prediction for a Marine Diesel Engine Piston considering Ring Dynamics

Advances in Mechanical Engineering, 2014
A newly designed marine diesel engine piston was modeled using a precise finite element analysis (FEA). The high cycle fatigue (HCF) safety factor prediction procedure designed in this study incorporated lubrication, thermal, and structure analysis.
Tao He, Xiqun Lu, Dequan Zou, Yibin Guo, Wanyou Li, Minli Huang   +5 more
doaj   +1 more source

Resilient Optimal Dispatch of Ship-Integrated Energy System and Air Lubrication Using an Enhanced Traffic Jam Optimizer

Journal of Marine Science and Engineering
With increasingly stringent greenhouse gas emission regulations in the shipping industry, there is an urgent need for an efficient energy management strategy for new energy ship power systems.
Wanjun Han, Jinlong Cui, Xinyu Wang, Xiaotao Chen   +3 more
doaj   +1 more source

Numerical Investigation of Gas Film Performance in Face Dry Gas Seals with Combined Micro-Textured Structures

Lubricants
To enhance the load-carrying capacity and operational stability of dry gas seal gas films while reducing gas leakage, and to provide a theoretical basis for structural optimization and innovation of face seals, a numerical model of gas film lubrication ...
Tianyi Shi, Yanting Zhang
doaj   +1 more source

Reynolds Equation for a Micro-Scale Lubrication of a Gas Between Eccentric Circular Cylinders with an Arbitrary Temperature Difference Based on Slip-Flow Theory

Lubricants
Micro-scale lubrication flow of a gas between eccentric circular cylinders with an arbitrary temperature difference is studied on the basis of the Navier–Stokes set of equations and the velocity slip and temperature jump boundary conditions.
Toshiyuki Doi
doaj   +1 more source

Influence of the dimple cross-sectional profile on the behavior of gas parallel slider bearings

Frontiers in Mechanical Engineering
This paper studies the effect of the dimple cross-sectional profile on the behavior of gas parallel slider bearings using the numerical method. The numerical method is performed in MATLAB software.
Xiang Liu, Xuanqi Li, Chunjie Yang, Hongbo Kang, Zhibo Zhai, Yuhao Cui, Wenjie Qi, Binhui Han, Fuxi Liu   +8 more
doaj   +1 more source

Calculation of oil volume and simulation of oil injection lubrication for high-speed helical gears based on image recognition technology

Jixie chuandong
ObjectiveAt present, there is a relatively sufficient analysis of oil injection lubrication for spur gears, but there is limited research on the commonly used helical gear oil injection lubrication for high-speed gears, especially in calculating the wind
HU Bo, CHEN Zan, DONG Jianxiong, SU Jie, YIN Lairong   +4 more
doaj  

Nonlinear Dynamic Analysis of High-Speed Aerostatic Conical Bearing–Rotor System with Micro-Orifice Frictional Loss

Machines
Aerostatic conical bearings with micro-orifices (ACBMOs) can simultaneously withstand both radial and axial external loads and have high power density. Nevertheless, due to the larger surface-to-volume ratio and length-to-diameter ratio of micro-orifices,
Qilong Han, Xiaoli Wang, Chen Zheng
doaj   +1 more source