Shafts TRIZ Cases

Independent main and secondary oil grooves keep aircraft turbomachine plain bearings lubricated during axial gear movement while limiting leakage.

A high-CLTE sealing layer and hard low-CLTE bearing layer improve sealing contact, durability, and service life in harsh fluid sealing conditions.

A PTFE-aluminum bearing cuts swash plate friction while improving neutral return, dimensional consistency, and assembly efficiency.

Controlled grain size and aspect ratio across surface and interior improve sintering homogeneity, wear resistance, and reliability in large silicon nitride parts.

An inflatable resin mandrel creates mold clearance before resin impregnation, preventing fiber bite while limiting resin use and tube weight.

Curved nanoscale convex units on the conductive member reduce toner and paper dust adhesion while helping remove embedded dirt.

An integrated impeller baffle and bearing housing cover improves sealing and cooling in gas turbine compressors while reducing loose hardware and assembly steps.

Removing the passive alloy surface before anchor-layer deposition improves coating adhesion while limiting thermal expansion mismatch in fluid bearings.

An internal ledge creates axial bias in a press-fit mast raceway, cutting fasteners, stress concentrations, and propulsion assembly weight.

A convex sliding surface balances hydrodynamic pressure in radial bearings, smoothing edge gaps and reducing wear in rotor and wind turbine use.

An interpenetrating urethane-acrylic or epoxy surface network suppresses toner charge transfer to reduce fogging at high-speed printing.

A convex profiled sliding surface maintains a stable lubricant gap in main rotor bearings, reducing deformation, edge wear, and pressure imbalance.

Radial cover grooves route lubricant from shaft slots to bearing members, avoiding inner race passages that raise stress and shorten bearing life.

A nitrogen-rich bearing steel surface layer with fine precipitates and compressive residual stress suppresses hydrogen flaking and indentation.

Discrete manifold nozzles and an oil mixing cavity limit hot oil carryover between pads, cutting bearing temperature and power loss.

A porous metal surface with fluororesin-filled recesses cuts friction while preserving heat dissipation, wear resistance, and seizure resistance.

Impulse-rich oil feed pockets push hot dragged lubricant aside so cold oil reaches tight bearing clearances, improving cooling and load capacity.

Defined pressure-cylinder clamping lets tools pass through the pressure plate to machine bearing cage pockets with less setup time, distortion, and chip buildup.

A radially offset dual sliding bearing layout holds the rotor hub in position, compensates play, and reduces gearbox wear in wind turbine nacelles.

An internal cable-and-support containment mechanism restrains a failed aircraft rotary shaft to limit flailing and secondary damage.

Interior channels cut snowmobile driveshaft weight while a roller bearing setup maintains belt tension and enables lower-RPM CVT engagement.

Two-stage aqueous saponification enables complex soap formation in non-polar base oils, boosting dropping point and reducing lithium hydroxide use.

A ball-and-socket joint lets a hydraulic ram plate pivot and grip vehicle surfaces securely in confined rescue spaces and at varying angles.

A metal core with energy-absorbing and composite ballistic layers helps aircraft drive shafts resist impact and penetration while staying lightweight.

Controlled β-Si3N4 grain size, aspect ratio, and orientation improve bearing rolling life while preserving strength and sliding performance.

A polyacetal blend with UHMW polyethylene, compatibilizer, and lubricant cuts stick-slip and wear while preserving moldability and surface clarity.

Hydraulic thrust-bearing control compensates shaft thermal expansion, enabling gas turbine replacement without losing steam turbine compatibility.

Stiff intermediate blocks share extreme loads in a roller bearing, preventing brinelling without the weight and bulk of overdesign.

A split core mold and staged lathe turning improve shaft centering and control peripheral wall thickness in cast hollow shafts.

Oblique-post cage openings let support teeth nest inside the bearing damper, cutting bulk while preserving fluid-film damping.

A localized low-strength shaft section melts or shears under overload, enabling compact thermal and over-torque disconnect protection.

Controlled α-grain structure and oxygen diffusion harden a titanium alloy surface without the grain coarsening that cuts fatigue strength.

A varying-inductance target lets one proximity sensor report shaft position, speed, and direction without multiple sensors or complex algorithms.

Integrated current source modules replace discrete gate drivers and power switches, simplifying maglev controller build and repair.

An adjustable slot and member vary the mounting hole diameter, making bearing removal and reinstallation faster in turbine power units.

An inclined cage pocket surface below the contact angle creates lubricant space at ball contact, cutting friction, torque, heat, and wear.

Annular recesses and bearing parameter changes cut EV bearing size and weight while preserving load support and improving lubrication flow.

A PPS-based blend of PTFE, UHMWPE, modified polyolefin, and amorphous polymer improves sliding lubrication and wear resistance under high load.

Controlling urea thickener particles to 2.0 µm or less helps high-speed bearings avoid oil film shortage, seizure, and durability loss.

A UHMW-PE sliding material with calcium phosphate, WS2, and SnS2 fillers cuts friction and wear for dry and lubricated bearing use.

A radial compressive-force sensor in the rack pressing mechanism enables easier, reliable rack-force measurement for steer-by-wire feel simulation.

A bronze bearing and stainless steel mount bridge thermal expansion differences in gas turbine bushings to reduce wear and improve durability.

A carbonitrided nickel-alloy outer ring with a cobalt or nickel inner ring cuts friction wear at high temperatures and extends ball joint fatigue life.

Integrated fluid channels and pad biasing improve startup separation, bearing rigidity, and axial vibration stability in a tilting pad bearing.

Dual injection pockets and a radial recess cut bearing power loss while preserving dynamic stability in high-speed gearboxes.

A hinged ferromagnetic panel bridges the housing back to expand display and keyboard positioning, reducing spinal strain and user discomfort.

Direct convex-concave engagement removes drive-surface gaps in a foldable module, improving hinge accuracy while adding spring damping.

A hollow multi-channel driveshaft cuts snowmobile weight and complexity while supporting durable low-RPM torque delivery with belt tension control.

Rare earth and alumina additives tune silicon nitride crystallinity to limit large pores and residual silicon, extending bearing part life.

A concentric inner-outer shaft with a projectile-sized gap and end sleeves helps aircraft keep power transfer after ballistic damage.