Propellers TRIZ Cases

A rotor blade actuator uses a tip-mounted sump and pump to deliver lubricant to the bearing.

Hard anodized aluminum oxide layers protect propeller blades from chipping and plastic deformation in abrasive sandy waters.

A portable apparatus uses a rotating filament to generate dynamic air disturbances that disrupt insect flight patterns.

Onboard electrical generation eliminates complex hydraulic systems for propeller pitch control, reducing maintenance needs and system weight.

External mounting of a common radial control shaft reduces hub ratio constraints, enabling smaller hubs and lower fuel consumption in unducted fan engines.

Tungsten balance rings attach to propulsor hub rims to counteract rotational forces, reducing rotor assembly weight while maintaining stability.

Segmented aperture panel enables efficient manufacturing of complex cooling patterns without drilling through the airfoil structure.

Accelerometers capture propeller vibration during flight, filtering data to detect imbalance trends and trigger maintenance alerts.

A monocrystalline turbine blade features a localized airfoil root thickening between specific suction and pressure face points to enhance casting flowability.

Mounting a service crane on the hub via the wing pitch bearing reduces nacelle weight while providing an operational area for component handling.

A rotor blade retention device uses tension-torsion straps to secure blades within a ducted rotor system.

Segmented damper design with adjustable mass resolves installation friction and wear issues in high-pressure compressor environments.

Nesting annular weights into cooling passages offsets mass while preserving airflow and reducing stress concentrations.

Rotating ogival shields with radial ribs divert bird momentum radially, reducing engine force and weight compared to static thick shields.

An aluminum alloy containing up to 5 weight percent scandium strengthens the compressor wheel against elevated temperature fatigue while maintaining low weight.

Segmented fine stop collar and oil transfer bearing restrict dangerous pitch angles by altering hydraulic fluid communication paths based on operational mode.

A three-dimensional airfoil shape defined by specific X, Y, and Z coordinates enhances aerodynamic efficiency in gas turbine rotor buckets.

Pins in turbine bucket pockets anchor composite fill material, distributing shear stresses that separate metal from polymer under centrifugal loads.

A soft-in-plane proprotor system uses lead-lag dampers and specific bearing assemblies to manage blade vibrations.

Wear-resistant plugs inserted into axial slots of a turbomachine rotor ring prevent uneven flange erosion and maintain critical clearances.

Local cement encapsulation prevents oxidation of sensor wires, stabilizing electrical properties and extending lifetime in turbomachine environments.

A drip device directs lubricating oil from a collecting channel into an oil drain using gravity.

Vertical airflow generator accelerates air through ducted passage to generate lift while reducing cubic power requirements of horizontal propellers.

A power device generates pressure differences through inner and outer fluid layers with distinct flow speeds to produce propelling force.

Selective reinforcement of turbine fan blades reduces flutter and fatigue by altering natural frequency without increasing structural complexity.

Segmented apertures in the noise reducer base plate lower mounting strain while maintaining structural rigidity for effective aerodynamic noise reduction.

Dynamic phase adjustment minimizes aircraft vibrations under varying weather and payload conditions without static pre-flight calibration.

Radially outward ambient air intakes supply blade cooling networks, eliminating compressor bleed trade-offs and reducing engine weight.

A propeller mounting structure uses a latching groove and protrusion to secure the hub without tools.

A rotor position determination system uses Hall-effect sensors and magnets to measure blade displacements in six degrees of freedom.

An extended part increases blade thickness at the tip end to constrain leakage flow, reducing rotational inertia while improving turbocharger efficiency.

Angled dovetail grooves distribute centrifugal forces across the attachment interface, preventing stress concentration at reduced hub diameters.

Removable impingement insert segments turbine blade platform into stacked plenums for targeted coolant delivery.

A GNSS vector system maintains stable winch positioning during low-speed hover operations by translating X, Y, and Z offsets into an intuitive 2D bubble guide.

Segmented side plate with axial and radial extensions guides swirling gas flow vectors within a multiblade fan impeller.

Co-curing adjacent fiber structures eliminates adhesive joints to reduce weight and improve manufacturing precision in wind turbine blades.

Sealed negative-pressure zones guide fluid flow through wing channels to generate lift while reducing energy consumption from fluid resistance.

Variable speed tilt rotors maintain constant thrust during rotor failure, reducing autorotation descent rates.

Internal blade passages jet fluid via differential pressure to weaken wakes, reducing noise and vibration without increasing apparatus size.

Bonding composite panels to metallic ribs reduces fan blade weight without sacrificing structural strength or increasing manufacturing costs.

External detachable transfer ring extracts hydraulic function from internal gearbox volume to reduce engine size while maintaining oil pressure.

Viscoelastic material in blade cavity ribs mitigates vibration and fatigue.

Metal matrix composite bonding cap projects from blade shell to define sharp trailing edge geometry.

A passive spoiler assembly alters airflow over a rotor blade skin layer to reduce component loads without active controllers.

A single actuator system controls multiple variable-geometry equipments across distinct gas turbine engine cores, reducing weight and complexity.

Raised discontinuous sides shift resonance frequency in fan shroud structures to reduce warping and distortion.

Variable-pitch fan blades resolve the thrust versus power trade-off by switching orientations based on flight conditions.