Self-aligned 0-level sealing of MEMS devices by a two layer thin film reflow process [PDF]
, 2003 Many micro electromechanical systems (MEMS) require a vacuum or controlled atmosphere encapsulation in order to ensure either a good performance or an acceptable lifetime of operation. Two approaches for wafer-scale zero-level packaging exist.
Gunn, R. +3 more
core +17 more sources
Simulation and Experimental Study on Sealing Characteristics of Hydro-Pneumatic Spring GS Seal Rings
Applied Sciences, 2023 Hydro-pneumatic springs often work under high pressure and alternating load conditions, which can easily cause seal damage, leakage, and serious failure.
Shuai Wang +4 more
doaj +1 more source
Shape Optimization of Labyrinth Seals to Improve Sealing Performance [PDF]
Aerospace, 2021 To reduce gas leakage, shape optimization of a straight labyrinth seal was carried out. The six design parameters included seal clearance, fin width, fin height, fin pitch, fin backward, and forward expansion angle. The CFD (Computational Fluid Dynamics) model was solved to generate the training and testing samples for the surrogate model, which was ...
Yizhen Zhao, Chunhua Wang
openaire +2 more sources
Applied Sciences, 2023 This study investigates the sealing performance of a combined sealing structure under extremely high and low temperature conditions, considering potential issues like high-temperature aging and low-temperature brittle fracture, which can lead to sealing ...
Shengpeng Zheng +7 more
doaj +1 more source
An investigation into the thermo-elasto-hydrodynamic effect of notched mechanical seals
Nuclear Engineering and Technology, 2022 A 3D thermo-elasto-hydrodynamic model is developed to analyze the sealing performance of a notched mechanical seal applied in the reactor coolant pump. In the model, the generalized Reynolds equation, the energy equation coupled with notch heat balance ...
Xiangkai Meng +3 more
doaj +1 more source
Sealing Performance of the End Fitting of a Marine Unbonded Flexible Pipe under Pressure Penetration [PDF]
Journal of Applied and Computational Mechanics, 2020 The sealing performance of end fittings is very important for offshore oil and gas pipelines. To investigate the sealing behavior of a ring-shaped wedge seal, global and local numerical models of the ring–pipe interaction have been developed based on the
Liping Tang +3 more
doaj +1 more source
Stamina of a non-gasketed flange joint under combined internal pressure, axial and bending loading : an experimental study [PDF]
, 2009 The performance of a bolted flange joint is characterized mainly by its 'strength' and 'sealing capability'. A number of numerical and experimental studies have been conducted to study these characteristics under internal pressure loading conditions alone.
Abid +16 more
core +1 more source
Stamina of a non-gasketed flange joint under combined internal pressure and axial loading [PDF]
, 2008 The performance of a bolted flange joint is characterized mainly by its 'strength' and 'sealing capability'. A number of numerical and experimental studies have been conducted to study these characteristics under internal pressure loading conditions ...
ASME boiler and pressure vessel code +5 more
core +1 more source
Design and Seal Performance Analysis of Bionic Sealing Ring for Dynamic Seal
Mechanics, 2020 In this paper, the non-smooth surface technology is applied to the surface structure of the rectangular sealing ring, and a bionic sealing ring is designed. Two-dimensional axisymmetric models of rectangular and bionic sealing rings were established. Effects of pre-compression amount, fluid pressure, friction coefficient and reciprocating velocity on ...
Yang HU, Jie ZHANG, Li Ming CHEN
openaire +2 more sources
Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
Mechanical Engineering Journal, 2021 Annular Blowout Preventer (BOP) is the core device for snubbing service in gas wells. The wellhead can be sealed by operating the BOP. Rubber core of annular BOP is the main part of the sealing process, and its failure will cause blowout accidents and ...
Hai YANG +6 more
doaj +1 more source