Ceramic coating shields generator bearing
August 6, 2010 by Kathleen Zipp
Filed under Seals
Excerpt: In an electric environment, electrolytic corrosion from stray currents threatens bearing performance. NTN’s coated angular contact ball and cylindrical roller bearings, the MEGAOHM Series, insulate the bearings from electric current. A special ceramic coating applied to the outer surface and side …
Waterproof switch covers for circuit breakers
June 8, 2010 by Kathleen Zipp
Filed under Mechanical Components, Seals
Excerpt: Waterproof switch covers for circuit breaker panel enclosures are made from silicone transparent rubber per MIL-STD ZZR 765. A molded design keeps out dirt and moisture. The breaker covers can be placed over the circuit breaker and bonded to the panel, or applied behind the panel and shaped to f …
A better way to infusion mold blades
June 8, 2010 by KRemington
Filed under Seals, Wind Power Construction, Wind Power Projects
Excerpt: Infusion molding is one way to make large composite structures such as turbine blades. Briefly, fiber plies and other materials are laid in a mold, covered and sealed with a flexible film, subjected to a vacuum, and infused with catalyzed resin. The method allows pulling air-free resi …
A super seal for temperature extremes
April 23, 2010 by Paul Dvorak
Filed under Environmental Issues, Seals
Excerpt: Isolast J9876, a recent perfluoroelastomer, provides the most comprehensive media resistance at elevated temperatures of any perfluoroelastomer on the market, according to its developer. Seals in this material, from Trelleborg Sealing Solutions, extend their life in aggressive, high-temperature …
Many seals for turbine tasks
January 2, 2010 by Paul Dvorak
Filed under Hydraulics, Mechanical Components, Seals
Excerpt: There is a lot of sealing work in a nacelle. Hydraulic equipment, of course, needs them along with areas such as where blades meet hubs. These must all be weather tight yet allow rotation. Simrit Americas, Plymouth, Mich., manufacturers several designs in a range of materials for these applications. …

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