A5004842810- Offshore Engineering and Technologies
- Cyclone Separators and Fluid Dynamics
- Granular flow and fluidized beds
- Oil and Gas Production Techniques
- Hydraulic and Pneumatic Systems
- Geotechnical and Geomechanical Engineering
- Engineering Structural Analysis Methods
- Tribology and Lubrication Engineering
- Mechanical stress and fatigue analysis
- Mineral Processing and Grinding
- Spacecraft and Cryogenic Technologies
- Gear and Bearing Dynamics Analysis
- Minerals Flotation and Separation Techniques
- Methane Hydrates and Related Phenomena
- Industrial Engineering and Technologies
- Elasticity and Material Modeling
- Aerosol Filtration and Electrostatic Precipitation
- Belt Conveyor Systems Engineering
- Fluid Dynamics Simulations and Interactions
Central South University
2022-2024
A reliable O-ring seal is an important guarantee for the stable running of deep-sea hydraulic systems and execution completion subsea tasks. Stress relaxation rubber materials under low-temperature conditions has impact on sealing performance, especially when coping with a sudden sharp increase in clearance height. In this paper, physical stress characteristics nitrile at low temperature 4 °C were tested. On basis, finite element numerical model structure utilized was developed. Then,...
The valve-controlled hydraulic cylinder system (VCHCS) is commonly used for actuators such as manipulators in deep-sea equipment, whose working performance crucial to subsea tasks. Affected by the ambient pressure introduced compensator, viscosity of oil increases significantly. On this basis, changes further when flowing slender pipeline, making pipeline loss substantially increase and subsequently affecting VCHCS. Aiming at issue, a detailed nonlinear mathematical model VCHCS established,...
The valve-controlled hydraulic cylinder system (VCHCS) is commonly utilized in the underwater manipulator, which most important tool for subsea tasks. Hydraulic oil viscosity very sensitive to pressure. Therefore, when working at different depths under ambient pressures sea, and pipeline pressure loss deep-sea VCHCS vary greatly, seriously affects energy efficiency of system. In addition, control accuracy also influenced by changes loss. order realize energy-saving control, this research...
The hydraulic collector is an important device for collecting seafloor polymetallic nodules. In this study, a nodule with two acquisition nozzles and one transmission nozzle described. numerical model of the established based on solid–liquid two-phase flow method, it verified by experimental tests. On basis, collection mechanism analyzed, effects structural parameters working its performance are explored. results show that height slant angle key factors efficiency, optimal heights below 150...
The performance of O-rings is crucial to the large variety core equipment or components that employ O-ring seals. surface imperfections meet quality standards are allowed be put into service. However, presence will inevitably affect seal. To this end, in study, nonlinear finite element models structures with an ideal circular cross section and three parting line projection, backrind, excessive trimming accordance ISO developed. On basis, their contact conditions stress distributions...