Engine Fuctions TRIZ Cases

A two-piece ring gear and direct radial oil flow remove the spline ring, improving turbofan balance while reducing wear and heat.

Separating airfoil and platform blanks improves tool access for cooling openings and enables more uniform coatings before assembly.

Elastic biasing keeps the turbine and bearing housings clamped during thermal expansion, suppressing loosening in transient engine operation.

Uses water from the gearbox lubrication reserve for engine injection, adding emergency power or duration without extra weight.

An asymmetric washer fills the counterbore to support the screw head, smooth the aerodynamic surface, and prevent sealing and detachment issues.

Recessed cantilever zones and circumferential grooves improve heat transfer, reduce misalignment, and limit hotspots in epicyclic gear train pivot pins.

Specified planet carrier and pin stiffness ranges help aircraft fan gearboxes compensate misalignment, preserve load distribution, and limit gear distortion.

Compressed air and controlled pressure release create turbulence that removes sub-3-micron particles from wind turbine gearbox cooling circuits.

Separate oil passages and guide grooves keep turbocharger journal bearings lubricated across high and low speeds, reducing seizure and bearing loss.

A rotatable deflector and coalescer form a serpentine passage that blocks lubricant migration and debris entry around gas turbine bearings.

Interlocking core features and repair plies restore thin ceramic matrix composite airfoils while resisting tensile and shear loads.

Two epicyclical gear sets and clutches create overlapping speed ranges, narrowing output speed variation while reducing brake wear and shift doorbelling.

A speed-sensitive pawl and ratchet blocks reverse windmilling at low speed, then lifts off at higher speed to reduce wear and preserve restart.

An integrated oil piston keeps axial preload on a gas turbine engine bearing during standby, reducing alternating loads and extending service life.

An auxiliary pump recovers and mixes oil to keep journal bearings lubricated during windmilling when the main pump cannot supply enough flow.

An annular scoop rotating with the sun gear boosts oil pressure for planetary gearset lubrication and cooling during low-speed operation.

A grooved spraybar adds longitudinal lubricant flow to improve scavenging, cut recirculation losses, and reduce torque and heat.

A shared sun gear with separate epicyclic drives lets the fan and low-pressure compressor run at different speeds, raising bypass ratio and easing turbine size.

A coaxial electric starter-generator and air turbine starter share one gearbox input shaft to deliver dual-mode starting without gearbox redesign.

Hook-supported retainers seal turbine blade cooling passages while reducing parts and simplifying blade assembly and disassembly.

A dual clutch gearbox adapts gear ratio to low-spool speed changes, keeping generator output stable and easing idle compressor stress.

Magnetic clutch disengagement isolates accessory failures from the gas turbine gearbox earlier than shear shafts, avoiding debris and rigid torque limits.

An air separation tube obstructs mixed air-oil flow, while a downstream venturi boosts oil entrainment and lowers air concentration.

A discontinuous inner and outer impact structure crushes to absorb fan blade energy and prevent forward ejection in gas turbine engines.

Flexible bridges in the starter ring gear absorb eccentricity and balance planetary loads, reducing tooth peak loads and wear.

Different valve disc geometries let one actuator open two airflow paths in sequence, reducing aircraft pneumatic weight and complexity.

A geared cam mechanism moves turbine blade tracks radially for faster, more precise tip clearance control while reducing rub and leakage.

A pressure sensor and restriction device isolate auxiliary pump output from scavenge pressure to detect emergency lubrication failures early.

Segmented core structures with meshed splice joints create resonance chambers that cut low-frequency aircraft noise without thicker panels.

Sensor data and anomaly alerts are combined to predict wind turbine component failures early, helping plan maintenance and cut downtime.

Electric slide actuation replaces hydraulic coupling between aircraft accessory box shafts, improving reliability and maintenance independence.

A rotating annular oil reservoir uses centrifugal force and injectors to keep gas turbine gearbox lubrication flowing during zero-g events.

Sprag clutches and a compact epicyclic gear train let an auxiliary oil pump run in either direction while saving circumferential space.

Integrated oil grooves, radial channels, and nozzles shrink the planet carrier axially while reducing fretting and simplifying assembly.

Thin aluminum- or copper-based journal bearing coatings handle high PV loads and sliding speeds while reducing power loss in aircraft gearboxes.

An air turbine starter lock uses a standard nut and bolted retainer to secure the sun gear while cutting custom parts and assembly time.

Radial sealing tabs at the rotor disc trailing edge form a face seal with blade roots to retain secondary air and limit hot gas ingress.

A spiral gutter channel captures lubrication oil from the gear train while limiting gas-induced churning, power loss, and poor lubrication in negative g maneuvers.

Integrated carrier plates, center arms, and axial bridges reduce torsional deflection while keeping gas turbine gearboxes compact and lightweight.