Shafts TRIZ Cases

A tuned Sn-containing axle steel balances tensile strength and ferrite fraction to raise smooth and notched fatigue strength in rail axles.

Boehmite particles and molybdenum disulfide in a polyamidimide coating cut friction and wear without the transfer issues seen with SiC.

Graphene nanoplatelet grease lowers shaft voltage and pulse discharge energy in VFD motor bearings, reducing EDM pitting and extending life.

Regularly spaced lightening holes cut bearing mass while preserving damping, improving oil cooling and reducing turbine gear vibration.

A co-molded metal ring strengthens a food-grade bearing casing against transport loads while elastomer overmolding removes visible surface defects.

Selective coil energizing counteracts shaft loads, cutting bearing friction and stress while preserving mechanical backup in vehicles.

A coated thrust washer and inner sleeve simplify roller boot bearing assembly while reducing wear and improving axial support.

A chloroprene copolymer with controlled nitrile content improves oil resistance in vulcanized rolls without sacrificing moldability or thermal performance.

Rounded grooves, curved channels, anti-twist seals, and vent ports improve lubricant retention while preventing hydraulic pressure lock.

A cage-stabilized rolling-element layout lets tilting pads run oil-free at high speed while reducing losses and compensating shaft misalignment.

A segmented rotating mold with an axial through-hole enables easy demolding of variable-diameter drum-shaped composite shaft tubes.

A yoke flange and reinforced base structure let disk drive motors support more disks while suppressing vibration, noise, and flange deformation.

A topcoat over chemically converted zinc plating suppresses interference color while improving gloss, corrosion resistance, and sliding performance.

A higher-pressure compressor-side oil path cuts pressure loss and seizure risk in turbocharger floating bearings.

A deformable shim redirects tightening load through the outer races, keeping break-away torque stable under higher external forces.

Crossbar recesses and localized thickness changes spread stress and cut friction losses in bearing cages for high-speed operation.

An Ag intermediate barrier blocks Cu diffusion into a Bi-Sb overlay, reducing Cu-Sb formation and delamination in Al alloy sliding bearings.

Segmented load and non-load bearing sections use different eccentricities to cut oil use and power loss without raising bearing temperature.

Polygonal hill-and-groove bearing surfaces raise dynamic pressure at low speed while enabling bidirectional, non-contact shaft support.

Spark plasma sintering combines superalloy and ceramic powders to keep bearing hardness, wear resistance, and fatigue life at up to 1400°F.

A cup-shaped rolling-element housing keeps a fire door hinge stable under lateral loads while blocking dirt and moisture from the pivot.

Rapid cooling after quenching controls residual stress in bearing races, suppressing elliptical deformation and reducing polishing burden.

Ribbed molded-plastic supports inside a thin-wall composite shaft raise buckling resistance and torsional stiffness under torque loads.

Cold-sprayed metallic powder builds bearing components layer by layer, enabling custom dimensions and material properties with low thermal stress.

Internal recirculation ducts let rolling elements pump lubricant through the bearing, preventing dead-zone stagnation without an external pump.

Resiliently mounted bearing pads preserve surface contact in angled rotary slide bearings, reducing wear under load-induced axis tilting.

Flexible elastomer sealing limbs bridge segmented bearing joints, maintaining sealing under tilt and bending to block moisture ingress.

A one-piece impeller baffle in the bearing housing cuts assembly complexity, prevents loose hardware, and improves sealing and cooling.

A Bi alloy overlay with locally distributed intermetallic compounds suppresses crack growth and grain loss while preserving conformability.

Nano-protrusion arrays on a flexible screen covering release bending stress, reducing fold creases while improving durability and glare control.

A pocketed Woodruff keyseat with shallow axial extensions cuts peak torque-transfer stress and improves shaft fatigue life.

A mixed-PFPE grease with fine fluororesin powder keeps sliding members operable from very low to high temperatures while reducing surface noise.

Casting the bushing into the track shoe with flanges and interlocks prevents displacement under heavy loads, reducing wear and friction.

Controlled shaft roughness and oil-film parameters keep large sliding bearings in fluid lubrication to reduce friction loss and seizure.

A composite sealing screen and flow-guiding cage keep lubricant inside compact high-speed bearings while blocking contaminants and resisting centrifugal dislodging.

Guide grooves, ribs, and stepped surfaces keep a telescopic rod aligned, prevent withdrawal, and free internal space for longer extension.

Thin elastic bridges replace sliding contact in a vacuum joint, enabling play-free motion under heavy loads without lubrication, heating, or contamination.

3D-printed permeable bearing and seal bodies create precise pressurized gas distribution for contact-free shaft support and sealing.

A stop part and guide tubes let a telescopic flap drive use shorter coil springs, cutting weight, space use, and closure risk.

Alternating elastomer and carbon-fiber PEEK laminae cut bearing weight 30-40% while preserving axial-load strength for rotor blade support.

Grooves route pump discharge pressure across journal bearing surfaces to cut leakage, counter biasing force, and reduce friction.

Separate binder-free solid lubricant and oil or grease layers cut friction and wear while extending service life at high speeds and low temperatures.

Sequential forging, ring rolling, annealing, quenching, and age hardening refine BeCu ring grain while preserving ductility and conductivity.

A spacer-based foil support insert separates top foil ends to tune shaft pre-load, raise spring stiffness, and simplify bearing assembly.

A matrix-domain polyurethane elastic layer cuts compression set and speeds roller shape recovery to reduce streak defects in electrophotographic images.

Synchronized amplifier timing cuts impulse-current interference in magnetic suspension bearings while preserving sensor SNR and response bandwidth.

Compressed air supports a reference mass without contact, eliminating friction and improving force gauge and load cell calibration accuracy.

Plastic sleeves with radial limbs let joint sealing bellows fit securely without expansion, compression, or extra clamping rings.

An aluminum bearing receptacle with a hard surface layer replaces steel sleeves to cut weight, improve heat dissipation, and resist wear.

A polyetherketone, graphite, and carbon fiber cage composition helps ball bearings retain strength and life under heat and humidity.