Engine Fuctions TRIZ Cases

Straight planet teeth enable axial sliding in an aircraft turbine reducer, cutting axial size, overstress, and wear.

Pressurized fluid holds the generator drive engaged, while spring release ensures high-force disconnection even at zero speed or during failure.

A composite gearbox efficiency rating links oil flow, fan diameter, and thrust to simplify geared turbofan development and gearbox selection.

Varying journal bearing passage areas balances lubricant flow to vertically positioned star gears, preserving film thickness in gas turbine drives.

Tabs on the fan blade carry two-part platforms, cutting hub-mounted parts, manufacturing complexity, weight, and assembly time.

A variable-speed transmission and clutch let low-spool accessories run at constant speed while shifting load off the high spool to cut fuel use.

Strategically placed diamond-shaped recesses ease bell housing casting while preserving rigidity and improving wind turbine vibration behavior.

An annular oil deflector fixed to the ring gear stabilizes the distributor stator, limits tilt, and preserves sealing for reliable lubrication.

A circumferential channel and lock nut let rotor balance weights be repositioned securely without disassembly, reducing vibration and weight loss risk.

Variable-depth cooling channels disrupt thermal stratification in rocket thrusters, improving wall heat transfer and propellant mixing.

A rotating collector and recirculation channel keep aeronautical gear meshes lubricated during oil supply interruptions without auxiliary hardware.

Vaporizing propellant inside the reservoir varies gas bubble volume to match changing rocket frequencies and suppress POGO instability.

A pressure-controlled valve and overflow line keep the fan reduction gear immersed in oil during autorotation without a secondary pump.

A grooved balance-weight lock uses sidewall retention and recess engagement to stop shift without crimping, reducing tensile stress and crack risk.

A segmented groove and gravity drainage region clear lubricating oil from the sealing interface to reduce turbocharger housing leakage.

Specific planet carrier stiffness ranges let an aircraft engine epicyclic gearbox compensate gear misalignment and keep load sharing even.

Separated annular cup basins and wall openings improve satellite pinion lubrication while preventing excess oil buildup, spills, and heating.

A speed-responsive scoop recycles oil from a static gutter to keep planetary gear bearings lubricated during shutdown or oil supply failure.

An oil-film hydrodynamic abutment holds the sun gear axially while preserving radial freedom, avoiding bulky axial bearings and hyperstatic effects.

Nested inner and outer housings keep seals engaged and fluid flowing despite radial, axial, and angular misalignment in turbine engine conduits.

Closed-loop oil pressure feedback lets the controller adjust valve-driven oil flow in real time, improving engine efficiency and pressure stability.

Alloy-coated journal bearings and controlled oil-film thickness cut friction and power loss in aircraft gas turbine gearboxes.

Flow-guided hollow passages let inlet plumbing act as a heat exchanger, reducing engine bay blockage, heating, and pressure loss.

Asymmetric groove spacing in an epicyclic gear train pivot pin balances bearing seating displacement and cuts misalignment under torque and centrifugal load.

A cover plate closes a gear-loading sidewall opening so a single-piece planet carrier can simplify assembly without losing structural integrity.

Noise and vibration spectra are mapped with equipment-specific ML models to detect faults and degradation early in rotating machinery.

A distance ring linked to the pump drive gear redistributes axial force in a wind turbine gearbox to limit spline wear and misalignment.

Non-line-of-sight cooling apertures in CMC airfoils improve film cooling exit angles on curved surfaces, lowering surface temperature.

A retention mechanism releases the starter output under high overrunning torque to prevent backdrive overspin and starter damage.

A cylindrical wall section between blade flanges cuts ring stress in wind turbine rotor hubs, preventing bearing bore fatigue cracks with less mass.

A lattice collector wall captures and drains sprayed gearbox oil to cut recirculation losses, heating, and seizure risk in aircraft turbines.

Concave deflector tabs between adjacent planets block oil recirculation, improve heat removal, and stiffen aircraft reduction gears.

Coaxial frusto-conical shields and tabbed deflectors improve oil flow, particle evacuation, and cooling in aircraft reduction gears.

A unitary carrier lets intermediate gears, the sun gear, and ring gear be assembled through a central opening while improving strength and rigidity.

A clutch-linked power transfer unit shifts excess low-pressure spool power to the high-pressure spool to cut idle thrust and fuel flow.

A superposition gearbox and one-way clutches split accessory drive power across both engine spools, improving starting torque and reducing single-spool loading.

Inflatable pouches and grip pads secure between turbine airfoils to prevent slippage and improve blade clearance measurement accuracy.

Angled oil entry into a rotating gearbox duct adds impulse and centrifugal conveyance to prevent bearing and gear meshing undersupply.

Acoustic impact testing checks wind tower flange fasteners in place, cutting manual inspection time while improving assembly reliability.

Lubricant scuppers feed torque frame and carrier interfaces by centrifugal force, avoiding pressurized pin passages and simplifying assembly.

Calibrated cavities and radial channels equalize oil flow in a rotating planet carrier, improving bearing lubrication under centrifugal force.

Leaked lubricant near a gas turbine seal is captured by a drain conduit and entrained into the scavenge flow to reduce loss and external buildup.

A radial V-shaped accessory gearbox fits within the nacelle to preserve airflow, simplify bevel gear alignment, and house larger accessories.

A larger sun gear and up to seven compound gears cut angular misalignment sensitivity and bearing loads in turbofan fan-drive gearboxes.

Variable-gap baffles in a fan drive gear carrier steer lubricant through gear meshes, limiting recirculation, heat buildup, and efficiency loss.

A gear-driven auxiliary oil circuit keeps the reduction gearbox lubricated during main oil loss, windmilling, and negative-g flight.

A gutter and passageway return leaked lubricant to the bearing compartment by using low pressure near the rotating gear outlet.

A quiet-zone sump layout uses counter-rotating shaft windage and turning passages to drain lubricant to one collection point with less weight and complexity.

Directional clutches keep the oil pump driven in either fan rotation, protecting geared turbofan bearings and gear teeth during windmilling.

Offsetting the lower rolling row below the screw fixing surface creates more screw space while preserving stiffness and torque transfer.