Engine Seals TRIZ Cases

A concave pillar clinch with transitional and overlapping surfaces disperses stress to prevent cracking in compact multi-layer metal joints.

An in-line filter, gasket, and retaining ring let users replace reagent bottles without leaks or particulate transfer in automated testing systems.

A single negative-pressure mechanism creates cavitation and positive pressure to cut sliding torque while maintaining sealability in a compact seal face.

A bellows flange lets the exhaust cylinder and manifold move radially under heat, reducing joint stress, fatigue cracks, and gas leakage.

An insertion pin and retainer secure the seal plate without bolt-head protrusions, cutting windage loss and root stress in gas turbines.

Blind recesses in the outer sealing layer raise local contact pressure, seal flange defects, and maintain a wide track at lower compression force.

A fiber-reinforced heelstock supports radial lip seals at medium pressure while preserving flexibility and preventing installation damage.

Magnetic repulsion supports the floating ring without plate springs, maintaining shaft clearance, sealing, vibration damping, and easier assembly.

Multiple sealing rings and an elastic pretensioning element improve rod seal reliability while reducing wear and fluid infiltration.

A pivoting feather seal in radially slotted BOAS segments maintains sealing despite CMC-metal thermal growth mismatch and gap changes.

A backing plate with abutments and pockets reinforces double brush seals to span axial gaps, improve sealing, and reduce stress concentrations.

Stacked corrugated thin plates around a floating ring add radial restoring and tangential damping forces to cut shaft whirl and leakage.

A movable cover exposes refill and vent holes for easier e-liquid injection, then seals them with a ring to prevent leakage.

Carbide and diamond-like carbon shaft layers create radial separation and graphitic lubrication to reduce wear, heating, and leakage.

A curved CMC intersegment seal with a spring-loaded metallic clip self-centers over BOAS gaps to maintain sealing with lower weight and delamination risk.

A tapered wall section and mating annular surfaces create elastic pressure sealing in a threaded work cylinder without added seals.

Rolling bodies in the sealing gap keep impeller and casing separated during startup, cutting leakage and wear in centrifugal pumps.

Elastic radial seal lips use rising internal pressure to strengthen sleeve contact and keep contaminants out of the pulley arm bearing.

Cooled recirculated fluid is routed back to the sealing gap to protect hot-media slide rings without a separate barrier fluid circuit.

A sealed intermediate pressure chamber equalizes deep-excavation pressure while avoiding bulky gas systems, oil churning losses, and seal failure.

A multilayer CNT masterbatch improves fluororubber kneading and dispersion while boosting abrasion and blister resistance in sealing parts.

Acrylic polymer blending with polar fumed silica cuts gasket surface tack while preserving flexibility, heat resistance, and reworkability.

A compressible main seal part stays trapped between flanges to keep ball joint dust cover sealing stable in narrow spaces and large swing angles.

An inert-filled sealed gap protects the metal array and reflector from oxidation, keeping force sensor characteristics stable over time.

A tapered Napier second compression ring balances contact pressure and oil scraping to cut fuel and oil consumption while resisting wear.

Pressurized fluid lifts floating seal tips around the rotor shaft to limit bearing oil leakage, reduce friction, and tolerate wear.

Different-width retention and stabilizer ribs keep a narrow groove seal from catching, tipping, or rotating during press-fit installation.

A tapered outer seal and harder inner seal prevent compression deformation in high-pressure water jets, improving seal durability.

A felt-like fibrous seal wipes vessel walls to protect air seals, prevent powder escape, and keep print particle transfer clean and stable.

Fluid-linked upper and lower chambers add viscous damping and variable stiffness to rail springs where rubber alone loses high-frequency control.

Internal lubricant passages feed a porous carbon seal to cool rubbing surfaces, maintain a wet face, and reduce thermal fatigue.

Compressed expanded graphite and a fine binder form a flexible seal that maintains sealing force under heat, pressure, corrosion, and thermal shock.

A convex metal seal uses rotational elastic deformation to maintain high sealing pressure with lower compressive load and less flange scratching.

A tapered drain back seal with a blow-back lip redirects oil into the engine block while blocking blow-by leakage at the head-block joint.

Cooling fluid routed through an internal seal passage removes heat at the seal interface, reducing rubbing-induced thermal stress and fatigue.

Carbon fiber, PTFE, and high-adsorption carbon black help fluororubber seals retain oil film and resist wear without losing sealing performance.

Compression-resistant steps between metallic seal teeth prevent crushing, protect flange surfaces, and maintain sealing under excessive preload.

Pressure-balanced gas channels and secondary rings cut carrier resistance, reducing intershaft seal wear and frictional heating in turbine engines.

Catalytic additives in a reciprocating seal form a carbon tribolayer from hydrocarbons, cutting friction and wear when liquid lubrication fails.

Intermittent laser welding secures a rolling bearing shield in limited axial space while reducing heat strain and outer ring deformation.

A barrier and edge seal isolate composite and metal joints from moisture and electrical contact, reducing galvanic corrosion and maintenance.

A tandem gas-lubricated face seal uses nitrogen barrier flow and separate centering to keep a constant gap and prevent methane escape.

Variable-area cushioning grooves and movable cushion packings fine-tune fluid discharge for smooth piston stopping and restart.

Depressions between bidirectional return elements redirect leaked medium back to the medium side, improving shaft sealing at very high speeds.

An ovoid packing body with a hollow center maintains sealing pressure under wear, heat, and shaft runout while reducing friction and compression force.

A dirt lip that follows sealing leg movement blocks contaminants before they reach the sealing lip, reducing friction loss and wear.

Concave seal surfaces and distributed ridges cut activation force, limit annular wall wear, and maintain reusable wellbore sealing.

Cooling passages through the seal element and guide rails cut rubbing heat stress while preserving sealing under turbine vibration and expansion.

Orientation markings or RFID help align integrated banjo fitting seals correctly, preventing high-pressure fluid leaks from misassembly.

An asymmetrical groove profile turns downhole pressure from below into radial contact force, helping metal seals maintain integrity in HPHT wellbores.