Rotary Propellers TRIZ Cases

Blast-treated anodic oxide coatings resolve abrasion resistance trade-offs by achieving high film hardness without increasing production time.

Adjusting geometric parameters of the side plate and ports reduces motor load while increasing airflow amount.

Varied pre-swirl stator spans reduce vessel resistance and cavitation by optimizing local flow conditions around the propeller.

A modular wind turbine uses rotating toroidal support structures to align individual turbines with wind direction for optimal power generation.

Composite marine propeller blades use dovetail gaps to reduce stress concentrations and facilitate direct load paths.

Replacing hydraulic actuators with a simple spacer reduces device complexity and manufacturing cost while enabling transom height adjustment.

A rounded bow radius with stabilizing fins reduces vortex shedding to improve course stability at small yaw angles.

Alternating side wall elevations and depressions form a saddle surface that reduces secondary flows and associated pressure losses in turbomachines.

Segmented elastic dampers absorb propeller shaft impacts while circumferential grooves prevent debris accumulation in the hub assembly.

An integrated propeller with an inwardly tapering tail portion eliminates separate end covers, reducing drag and corrosion while boosting efficiency.

A propeller fairing structure enhances fluid flow between blades using a radially outer surface conforming to a specific platform profile.

Baffle plates in a tangential flow machine manage fluid dynamics to enable dual propulsion and generator operation.

Airfoil fins connect the central shaft to the duct in an outboard motor, recovering energy from propeller swirl to offset rotational resistance.

Segmented pipe segments store the motor and propeller compactly, then extend to provide propulsion when stranded.

Air motor drives propeller using compressed air from storage tanks to replace fossil fuel engines and reduce environmental pollution.

An electric marine propulsion system uses a dynamic surface drive propeller and independent stern thrusters for precise low-speed maneuvering.

A propeller nut with a conoidal trailing portion promotes turbulent fluid flow over the drive shaft.

A ship transmission device uses a C-shaped support arm and orthogonal hinged plates to lift the propeller assembly.

Integrating the engine and gearbox into the hydrofoil housing reduces mechanical distance and drag while enabling passive thermal cooling.

Merging web and spar cap functions into a single composite structure lowers blade mass and manufacturing complexity.

A turbine blade tip baffle bifurcates the airfoil tip into two pockets, recovering leakage flow to reduce energy loss while managing thermal expansion risks.

A modular boat uses a hollow main body and detachable inflatable floating elements for compact storage.

Separating the motor controller into a dedicated axial casing reduces wiring length while maintaining hydrodynamic performance and thermal management.

Merging the motor rotor with the screw eliminates central shafts and external motors, reducing system bulk while maintaining continuous product transport.

A segmented pin with a hexagonal head engages recessed areas to restrict relative rotation between turbine engine disks and spacers.

A novel XWA-003 aerofoil profile with optimized thickness distribution and leading edge curvature.

Protrusions on fan blades enter wall grooves to break large vortices, lowering acoustic noise while preserving air moving capability.

Auxiliary propellers generate control force at low speeds, resolving launcher compatibility constraints and extending mission duration.

A dual propeller assembly aligns two coaxial units via a barrel and locking nut without welding.

An integral bushing design stabilizes the maximum operating angle, resolving positional variation caused by spline hole tolerances.

A submerged planing surface generates hydrodynamic lift using a single wetted high-pressure face while the low-pressure side remains covered by a gas-filled void.

A marine propeller with a tapered hub reduces pressure drag while maintaining uniform load distribution across the blades.

Rotatable nozzles and individually adjustable rotor blades enable transverse thrust generation, eliminating rudder resistance while maintaining maneuverability.

A fan rotating blade with a vertical hub, backward mid-span, and forward tip portion increases air flow rates.

A diffuser-type endplate propeller design shapes blade endplates to maintain a negative angle of attack during rotation.

Radial reaction fins on twin-skeg ships manipulate water flow to increase wake gain, reducing underwater resistance while enhancing propulsion efficiency.

Segmenting the hub into a body and cap eliminates tapered features that increase drag, reducing fuel consumption while maintaining torque transfer.

Adjustable cutting device prevents propeller entanglement with marine grasses by dynamically repositioning the blade relative to rotating blades.

Hollow exhaust vanes channel motor gases through the pump jet housing to discharge them forward of the impeller, preventing mixing with water flow.

A transverse flux stator assembly with a U-shaped core reduces hydraulic drag and manufacturing costs while maintaining high torque transmission.

Pivoting blade irons adjust positions via centrifugal force to balance rotating assemblies and eliminate vibration.

Polyurethane resin system cures at ambient temperature to eliminate bubble formation and reduce curing time.

Acrylic elastomer additives resolve brittleness in expanded polyesters by improving shear elongation at break while maintaining compression strength.

Directional ports in a tapered propeller shaft tunnel increase water flow, resolving suction-induced hydroplaning inhibition on planing hulls.

External wiring routing along the casing reduces torsional stress, enabling greater steering angles without wire entanglement.

A series damper unit transmits torque through aligned elastic components to increase operating angle.

A thruster bracket mounts propulsion units to angled boat transoms using a horizontal neck and support plate.

A compact shift device accommodates the dog clutch in a narrowed housing portion to reduce front projection area.

A twisting member links a flywheel to a distant damper, resolving insufficient vibration absorption in outboard motors.

Segmented tunnel nozzles prevent ventilation in shallow water while reducing flow resistance and power requirements.