Results 121 to 130 of about 1,207,824 (393)
Design considerations in mechanical face seals for improved performance. 1: Basic configurations [PDF]
Basic assembly configurations of the mechanical face seal are described and some advantages associated with each are listed. The various forms of seal components are illustrated, and functions pointed out. The technique of seal pressure balancing and its
Greiner, H. F., Ludwig, L. P.
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Circumferential shaft seal [PDF]
, 1980 A circumferential shaft seal is described which comprises two sealing rings held to a rotating shaft by means of a surrounding elastomeric band. The rings are segmented and are of a rigid sealing material such as carbon or a polyimide and graphite fiber ...
Ludwig, L. P.
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Advanced Functional Materials, EarlyView.The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich +6 more
wiley +1 more source
, 1974 Mating flat surfaces inhibit leakage of a fluid around a stationary shaft. A spiral groove produces a pumping action toward the fluid when the shaft rotates. This prevents leakage while a generated hydraulic lifting force separates the mating surfaces to
Ludwig, L. P., Strom, T. N.
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Advanced Functional Materials, EarlyView.Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein +4 more
wiley +1 more source
Cryogenic seal remains leaktight during thermal displacement [PDF]
, 1967 Cryogenic seals protect the surfaces of a plastic member in a low-pressure system subjected to extreme temperature changes. The outer seal is an aluminum expansion ring bonded to the lens outer surface and the inner seal consists of a resin-filled ...
Fields, T. H. +2 more
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Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)
Advanced Functional Materials, EarlyView.Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao +5 more
wiley +1 more source
The seals of Karadjordje and of other most prominent leaders in the First Serbian uprising [PDF]
Zbornik Radova Filozofskog Fakulteta u Prištini, 2007 The seals which carry the symbols of the First Serbian Uprising appeared quite early, only a few months after its breakout. The seals with the Uprising symbols have a distinct West-European heraldic form.
Atlagić Marko
doaj
Thermal and structural assessments of a ceramic wafer seal in hypersonic engines [PDF]
The thermal and structural performances of a ceramic wafer seal in a simulated hypersonic engine environment are numerically assessed. The effects of aerodynamic heating, surface contact conductance between the seal and its adjacent surfaces, flow of ...
Steinetz, Bruce M., Tong, Mike T.
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High temperature, flexible, fiber-preform seal [PDF]
, 1992 A seal is mounted in a rectangular groove in a movable structural panel. The seal comprises a fiber preform constructed of multiple layers of fiber having a uniaxial core. Helical fibers are wound over the core.
Steinetz, Bruce M., Strocky, Paul J.
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