Engine Seals TRIZ Cases

An offset cold-build gap and angled beam linkage balance shoe deflection in an engine seal, cutting mean stress and fatigue.

A comb-like brush seal uses precipitation-hardened nickel superalloys to handle high turbine heat and pressure without thin-wire tradeoffs.

A double-acting seal cartridge uses carbon elements, mating-ring tangs, and snap-ring retention to stop lubricant mixing between gearbox and accessory.

A stepped ring and upstream restriction split seal flow into exit and secondary paths, improving pressure control and protecting downstream components.

An electromagnetic carrier load offsets spring preload in dry gas seals to cut slow-roll friction, prevent hang-up, and reduce leakage.

A dual-compartment pressure packing lets reciprocating compressors switch between sweet and sour gas service with less complexity and lower leakage risk.

Segmented seal shoes, spring beams, and resilient biasing elements improve annular gap sealing while reducing internal stress and material stiffness demands.

Ceramic or polyimide coatings on conductive gasket surfaces replace GRE, enabling thinner electrical isolation with stronger sealing at high temperature.

Pilot features on seal seats guide gas turbine ring seals into radial alignment during assembly, preventing off-center damage and improving seal life.

A multifunction seal routes cleaning liquid through built-in channels, simplifying teat cleaner assembly while reducing dirt traps and pressure loss.

Inner and outer seal lips with tailored surface geometry maintain contact pressure and sealing when ambient pressure exceeds internal pressure.

Elastic facing portions at the sealing ring joint create pressure contact and a labyrinth path to cut turbocharger leakage.

Ultra-low-silicon amorphous carbon on mechanical seal faces blocks silicate buildup while preserving fluid-film lubrication and leak resistance.

Sliding L-shaped seal sections with spring tabs maintain turbine sealing under large deflection and high heat while reducing wear and leakage.

Angled discharge grooves and positive-pressure grooves keep contaminants moving out of sliding faces, reducing wear, friction, and leakage.

Flexible blade-tip brushes fill the fan clearance gap to cut aerodynamic losses, lower noise, and protect blade durability.

A solid O-ring seals at rest, then expands under rotation to avoid wear while a labyrinth passage blocks contaminant ingress and fluid leakage.

A softer outer seal and harder inner support improve fluid-tight conduit connections by boosting sealing engagement and resisting leaks under pressure.

A spring-loaded pivoting seal assembly follows radial blade movement to reduce leakage, maintain tip clearance, and prevent rubbing in gas turbines.

A lip seal with hollow or concave sections simplifies segment assembly while maintaining stable sealing in composite hollow-structure molds.

A flexible ring-advancing mechanism aligns split seal ring halves before elastomer expansion, preventing gap interference during assembly.

Single-transition anchoring and articulating seal segments cut stress and wear caused by differing motion between neighboring transitions.

A zoned seal plate with bolt, oil-passage, and alignment ears seals integrated drive generator housings while supporting constant-frequency operation.

Engine heat activates a shape memory alloy grommet to self-seal the steering gearbox panel opening and prevent water intrusion.

Overlapping ring-shaped seal parts create multiple line-contact points, improving sealing and contaminant scraping without complex processing.

Deep grooves linked to the sealed fluid side sustain the low-pressure fluid film in sliding seals, cutting wear, torque, and leakage.

Selective matrix infiltration creates a rigid ceramic seal body and flexible fiber edge to resist creep, oxidation, and heat in gas turbines.

Tracer particles embedded in PTFE-reinforced graphite packing enable permanent identification while reducing friction, extrusion, and emissions.

A porous heating film replaces spiral wire to spread heat across the atomizing surface, improving aerosol uniformity and taste.

Inflected U-shaped seal walls and pressure balance holes cut thermal stress and leakage between gas turbine mate faces.

A J-shield gasket keeps a gas turbine W-seal engaged with less radial contact, cutting weight while reducing wear and dislodgment.

Leaked gas from dry compressor seals is captured, pressure-buffered, and safely reused or flared instead of being vented to atmosphere.

Vent grooves in metal transmission components bleed trapped air before clutch engagement, reducing shift delay and incomplete gear shifts.

A ring-cap sealing structure bridges collar-sleeve gaps to preserve damping and reduce frequency shifts under tolerances and thermal expansion.

A U-shaped carrier extends beyond the seal shoe to add damping, suppress flutter-type vibration, and preserve tight hydrostatic seal clearances.

A wire-core EPDM seal helps belt filters prevent leakage and bearing wear while maintaining low-friction sealing up to 200°C.

Discrete intumescent members in a compressible joint seal improve fire and water resistance while preserving recovery and ±50% movement.

Angled grooves create 3D mating end faces that let split seal ring halves self-align axially and radially, reducing emissions and seal wear.

A circumferential cooling passage in the rotating seal plate removes friction heat at the face seal contact area, extending wear life and lowering weight.

Placing the longest tooth near the shoe aft end stabilizes high-speed jet flow, improves damping, and reduces vibratory stress in hydrostatic seals.

Curved spring beams in a non-contact annular seal maintain uniform airgaps while cutting radial thickness, stress, size, and weight.

Local variation in composition, porosity, and cell structure lets gas turbine seals wear in a controlled way to cut leakage and simplify fabrication.

A weld-free brush seal assembly uses wound wires, compressible cores, and shaped backing to fit small engine core spaces while maintaining integrity.

A movable gland and labyrinth seal maintain sealing during lateral shaft deflection, blocking water and debris ingress in retractable light assemblies.

Temporary adhesive holds HALO seal shoes outboard during assembly, then burns off at heat to restore clearance and avoid shoe damage.

An embedded insert creates detectable wear particles in lubrication oil, warning of face seal wear before metal contact, leakage, and spark risk.

Bladelets paired with a knife edge seal cut intershaft leakage while allowing larger rotor shaft deflection without extra bearing assemblies.

Interlocking protrusions and recesses restrain gas turbine seal movement, preventing combustion gas leaks and improving long-term reliability.

Rabbit-ear sealing lips and segmented flexible cells confine shaft-induced deformation, reducing parasitic openings and aerodynamic disturbance.

A tapered, deformable back-up ring helps fuel injector seals stay coaxial, fill gaps, and maintain sealing under changing fuel pressure.