Simrit seals for jet engine applications

Jet Engine SealingFreudenberg and NOK GroupSimrit seals for jet engine applicationsSimrit offers a wide range of sealing products for diverseaerospace applications including:Airplane engines—rotating shaft seals for main engineshafts, gearboxes, pumps, and generatorsRockets—turbo pump seals and static flange sealsSpace vehicles and equipment—welded bellowsaccumulators for KIBO experiment unitsBrush seals for the main engine shaftThe demanding operating conditions encountered in today’s gas turbineengines, along with increasing environmental concerns, have created theneed for an alternative to conventional labyrinth seals. Brush seals havebeen developed to accommodate the radial movements of the dynamicrotor shaft; the bristles are designed to flex. The free length and angle ofthe bristles, as well as the wire diameter, are adapted to each applicationin order to optimize seal stiffness. The result is low wear and lowleakage. In addition, brush seals offer a potential reduction in specificfuel consumption over labyrinth seals.

Simrit seals for jet engine applicationsSegmented seals for the main shaftCircumferential segmented seals are designed for gas sealing applications.The most common of these are for main shaft seals in jet aircraft enginesand gas turbines. Simrit’s segmented circumferential seals also serve awide range of applications in rotating machinery such as compressors,blowers, etc. Circumferential segmented seals are ideal for high performanceequipment where large axial shaft movements, space requirements,weight reduction, and/or efficiency are major concerns. The seals arecomprised of a set of segmented carbon rings which contact the shaft(or runner) to form a circumferential dynamic seal.Compact mechanical seals for gearboxes and accessoriesCompact mechanical seals are stationary, “face” type seals designed fora variety of applications: aircraft engine accessory gearboxes and mainshafts, hydraulic pumps, starters, compressors, industrial generators, andother high-speed rotating machinery. Based on customer applicationrequirements and in reference to extensive material testing from Simrit, awide spectrum of materials and designs are available. Simrit also offerscustom-engineered seal configurations that have been developed assealing solutions for a wide range of particular operating conditions.ACTISEAL® for hot sections and fuel linesACTISEAL is a static metal seal which prevents the passage, flow, orleakage of a gas or fluid. Static sealing takes place between surfaceswhich have little or no movement relative to one another. Our metallicseals provide robust seal integrity for many demanding sealing problemsin a variety of industries. ACTISEAL products have a substantial trackrecord of success in solving leakage problems with several seal typesavailable.ACTISEAL–C enables tight leakage control with a lighter compressionload than a traditional metal O-ring.ACTISEAL–E and ACTISEAL–W both provide excellent capabilities forlarge flange deflections.www.simrit.com© 2011 Simrit