Propellers TRIZ Cases

A shape memory annular part deforms under load to absorb energy and decouple from the casing.

A composite lock system prevents saltwater ingress into offshore wind turbines, ensuring safe personnel access during adverse weather conditions.

A single blade propeller uses a pitch control unit as a counterweight to balance rotation.

An intermediary retainer hooks into rings on a rotor blade flange, enabling pitch adjustment while preventing disengagement from the open fan engine system.

A propeller control mechanism merges flapping, lead-lag, and feathering functions into a single integrated structure.

Telescopic lubricant ducts accommodate mobile body misalignment and radial forces, ensuring reliable bearing lubrication without complex sealing mechanisms.

Optimized dovetail backcuts divert blade load paths to reduce disk stress concentrations and extend fatigue life.

External actuator placement eliminates hydraulic fluid transfer across the rotating frame, simplifying gas turbine engine maintenance.

A segmented turbomachine blade uses variable sweep angles across radial stacks to enhance aerodynamic efficiency.

Radial arms transport fluid through a rotating shaft to separate channels, resolving static connection conflicts in upstream propeller configurations.

Chamfers and radial grooves mitigate axial stress in high pressure turbine disk hubs, increasing engine life from 11,000 to 15,300 cold start cycles.

Segmented hub design reduces production complexity by enabling pitch adjustment through standardized blade components.

Shape memory alloy spacers absorb impact energy and prevent fretting wear while maintaining precise blade positioning.

Segmented impeller joints accommodate centrifugal deflection, maintaining tight tip clearance and compressor efficiency.

Central actuation removes intermediate guidance parts, eliminating wear and simplifying maintenance of turboprop fan blade pitch control systems.

A fan driven by an auxiliary power unit accelerates the fuselage boundary layer to reduce aerodynamic drag on aircraft.

Backup battery supplies energy to the DC link capacitor, maintaining charge as voltage drops during AC power dips to prevent wind turbine overspeed.

A turbine cooling chamber uses dynamic pressure conversion to force coolant through wall apertures for surface impingement.

Segmented propulsion uses a foldable large propeller for quiet loitering while a small propeller handles take-off, resolving noise and power trade-offs.

Convex rotor hub geometry reduces drag by eliminating flow separation, enabling higher maximum flight speeds.

A composite rod sensor assembly couples into a blade receptacle to reduce vibration and weight while enabling easy removal.

Adhesive coupling joins the outer ring to the propeller blade root portion.

Segmented fan platform ribs reduce vortex amplitude and turbulence while maintaining compression efficiency with fewer blades.

A turbine rotor blade features a curved leading edge connecting to the tip shroud for smooth gas flow.

Segmented pitch links with phase adjustment levers maintain delta-3 coupling while supporting more than three blades.

A flapping lock mechanism folds rotor blades to reduce aerodynamic loads.

Segmenting spar caps with premium fibers in outboard zones reduces manufacturing complexity while maintaining structural integrity.

A modular air vehicle transitions between rotary wing and fixed wing modes using an unmanned air module.

A fluid pump uses a volute chamber to impart solid-body rotation to the working medium.

Eccentric counterweights drive synchronized fan blade orientation through a direct bevel gear linkage.

A perforated shroud surrounds a UAM rotor to attenuate noise via a resonating hollow chamber.

Acoustic sensors measure emissions to calculate wear, replacing complex vibration systems that require significant computational resources.

Segmented rollers prevent overflapping and binding at low speeds, enabling higher forward airspeeds without structural failure.

Phase adjustment of propulsion mechanisms cancels asymmetric forces, reducing structural vibration and improving flight stability.

A sub-idle hybrid operation mode manages thermal engine standby and electric motor propulsion to optimize aircraft energy usage.

Dihedral and sweep geometry on rotary machine airfoils disperses tip flow structures, reducing noise while maintaining aerodynamic efficiency.

An insert within a propeller blade foam core manages shear forces to prevent cracking and bulging under operational loads.

Adjusting propeller blade angles maintains constant torsion moments, eliminating alternating loads 1P and reducing structural fatigue.

An electrical control device uses dissimilar measurement systems to compare positions and prevent untimely thrust changes during critical flight phases.

Injection molding embeds the impeller into a connecting element flange, preventing shaft perpendicularity damage from thermal expansion.

Rotor cage with optimized spars and ribs generates aerodynamic drag to maintain horizontal attitude and facilitate controlled descent after rotor failure.

Dividing turbine airfoils into halves exposes cooling microcircuits for pre-assembly inspection, eliminating hidden leakage paths and simplifying maintenance.

Resilient members absorb shear forces from dynamic loads, reducing stress on accessories while maintaining constant diametric dimensions.

Optimized impeller geometry and volute casing maintain high discharge pressure when pumping viscous ethanol-water mixtures at -4F.

An electric motor rotates a cam profile within a race member to guide a trunnion pin, eliminating hydraulic leaks and simplifying feathering systems.

A ceiling fan blade iron mounting system uses a dovetail tongue and flat spring for secure attachment.

An annular shim interposed between a fan disk and boost compressor drum provides a replaceable axial bearing surface.

Collar studs with radial clearance push the spinner axially during disassembly, eliminating specialized tools and reducing surface damage risk.

Streamline cross sections in steam turbine intermediate support structures reduce fluid loss and maintain blade strength.