Propellers TRIZ Cases

Replacing spline connections with ball joints reduces parasitic forces and maintenance needs in variable collective pitch rotors.

Stepped blade stiffness changes dampen resonant vibrations while thrust distribution minimizes vortex noise.

Cooling slots in forward and aft flanges purge hot leakage air from rim cavities, reducing thermal damage to rotating disks.

A locking member engages aligned slots in a turbine blade dovetail and retention ring to constrain axial and radial movement.

An internal dome structure funnels entrained dust through turbine blade cooling holes.

Step-up overlapping propellers reduce airflow interference while enabling longer-range travel for versatile cargo or passenger transport.

Pressurized air creates a differential across seals to prevent oil contamination in the turbine section.

Segmented conductive strips and panels distribute lightning current across wind turbine blades, reducing sensitivity to blade pitch variations.

Integral turbine nosecone deformation region absorbs bird strike energy via controlled fracture, reducing weight and manufacturing costs.

Sinusoidal end-wall profiling reduces corner separation and flow reversal by modifying static pressure distribution along the blade passage.

A renewable energy extraction device accelerates flowing water or air through a narrowed cross section to drive a power shaft.

Dual shrouds reduce eddy formation and noise while increasing air flow rate by up to 10.9% in refrigerator applications.

Segmented rings absorb centrifugal loads via plastic deformation, preventing catastrophic failure when one ring breaks.

A controller adjusts fan blade pitch and outlet guide vane angles to optimize thrust split between ducted and unducted engine streams.

Thermal oxidation of zirconium-niobium alloys creates adherent oxide layers that resolve manufacturing complexity while delivering superior scratch resistance.

A retractable duct system extends over propellers to enhance thrust during takeoff and retracts into the wing structure.

A gimbal joint links upper and lower airframes to tilt the rotor system with the pilot, replacing complex swash plates to simplify operation.

Annular springs connect fixed casing ferrules to load transfer bearing rings for passive propeller blade feathering.

Sacrificial bumper surfaces shield high stress dovetail regions from disk contact during windmilling, extending component service life.

A propeller blade mount passively folds blades to a stowed position using wind resistance and centrifugal force.

A dual-reservoir lubrication system uses a pressure-actuated valve to shift fluid flow paths for wind turbine gear protection.

Blades with optimized hub tip ratios handle high distortion boundary layer flow, reducing wake losses and improving propulsive efficiency.

Constant velocity joints and slide connections compensate for angular and axial misalignments in aircraft propulsion torque transmission.

A propeller arrangement uses radially extendable assemblies to optimize diameter.

A composite fan blade connection system uses a metallic intermediary interface to join the rotor hub and blade root via transverse fasteners.

A phonic wheel tooth with a raised axial end and uniform mid portion generates precise angular position feedback signals.

A planetary fan drive gear system with a ratio of at least 2.5 connects the low pressure turbine to the fan carrier.

Centrifugal shear forces from rotating weights cancel rotor vibrations, reducing structural fatigue and improving passenger comfort.

A partial coarse pitch ram air turbine design uses a hub assembly to bias governor shafts for optimized blade pitch angles.

Counter-rotating rotors on half-wings and a rear propeller maintain proportional speeds via electronic engine control, reducing mechanical power consumption.

A dual-rotor electric machine uses distinct magnetic pole pairs to interact with stator windings via different spatial harmonics.

A resin impeller manufacturing method uses a thin connecting portion to detach excess gate material from the molded body.

Segmented impeller blades with fluid receiving parts reduce bearing loads via rotor buoyancy, preventing mud accumulation and energy loss.

A cooling duct channels airflow between heat generating components inside a rotor hub fairing.

Rotatable tail assemblies with active aerosurfaces resolve downwash inefficiencies during vertical takeoff by optimizing thrust vectoring.

Blade flow deflectors convert non-productive radial airflow into tangential force, increasing torque and power extraction without extending blade length.

Magneto-resistive sensors detect magnetic field changes to measure rotor blade displacements, resolving measurement precision limits against device complexity.

Centrifugal mass elements extend aerodynamic brake flaps to limit torque and prevent self-destruction during high wind speeds or power failures.

Strategic cooling through holes target high-stress areas on the shroud cover, reducing creep rupture risk while avoiding complex plenum structures.

One actuator controls stator vanes and air-bleed valves, eliminating separate systems to cut weight and cost.

A suction stage design with a rotating impeller and converging hub directs fluid axially to reduce centrifugal wheel diameter.

A fan with pressurizing sections manipulates air flow pressure to block moisture and salt fog from entering the internal sleeve and rotor assembly.

Segmenting the blade into optimized sections reduces stress concentrations from centrifugal loads while maintaining aerodynamic efficiency.

Separate sleeve-shaped control tube slides onto rotor blade coupling section for positive-locking interconnection.

An electromechanical actuator drives propeller blades via a transmission screw and nut mechanism to adjust pitch angles.

A fluid pump uses flexible rib elements and a tautened membrane to create expandable rotor blades that adapt to flow pressure.

A segmented fan unit housing with integral protective grids enables tool-free bayonet mounting.

A propeller governor adjusts pitch to maintain constant electric current draw in synchronous thrust systems.