. Development of a spherical acrylic plastic pressure hull for hydrospace application. Hulls (Naval architecture); Submersibles. neoprene bearing gasfcet. steel compliant retaining flange neoprene bearing gasket Several sealing systems were considered for sealing the beveled hatch ring to the beveled bearing surfaces of the acrylic plastic capsule. Besides standard O-ring seals, rubber gaskets and epoxy adhesive were also consid- ered. The O-ring seal was known to be reliable, but the groove in the metal would cause a contact stress raiser on the acrylic plastic bearing surface. A rubber gaske
. Development of a spherical acrylic plastic pressure hull for hydrospace application. Hulls (Naval architecture); Submersibles. neoprene bearing gasfcet. steel compliant retaining flange neoprene bearing gasket Several sealing systems were considered for sealing the beveled hatch ring to the beveled bearing surfaces of the acrylic plastic capsule. Besides standard O-ring seals, rubber gaskets and epoxy adhesive were also consid- ered. The O-ring seal was known to be reliable, but the groove in the metal would cause a contact stress raiser on the acrylic plastic bearing surface. A rubber gasket interposed between the metal and the acrylic plastic bearing surfaces would eliminate any stress concen- trations, but would permit larger relative motion between the insert ring and the hull. Unless consider- able force was constantly pressing the insert ring against the acrylic plastic, leakage would take place at the beginning of the dive until the capsule reached a substantial depth where hydrostatic pressure force would seal the hatch assem- bly against the acrylic plastic bearing surface. Some thought was also given to using epoxy adhesive to bond the hatch insert ring in place permanently, thus eliminating both relative movement between the parts and the leakage. This approach, however, was discarded as it was known that the magnitudes of forces acting across the metal—acrylic plastic interface would be so large that the adhesive would shear, permitting the water to leak in. Although the advantages and disadvantages of the O-ring and the gasket sealing systems are about equal, the O-ring system was chosen for the acrylic plastic capsule because it utilized primarily off-the-shelf seals. If the stress raiser problem proved troublesome later, the lubber gasket system could be Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber17
