Piston Rings TRIZ Cases

A threaded side plate and axially locked nut distribute preload evenly to limit thermal stress, fretting, and oil consumption in rotary engines.

A tubular metal ring uses internal hydraulic pressure to deform evenly, reducing alignment demands and avoiding seal damage from high clamping loads.

Periodic arc-current interruption forms a thicker piston ring DLC film with controlled hardness, improving adhesion, heat resistance, and wear.

A copper-nickel-tin ring conducts heat away from the crown, enabling a higher top ring position with less groove wear and pre-ignition.

Circumferential groove undulations offset piston thermal distortion to keep ring support stable and reduce blowby and oil consumption.

A retaining ring beside the piston ring limits radial wear and frictional heat while preserving compressor sealing under high pressure.

A thick low-hydrogen hard carbon coating uses an HM/HIT ratio of 0.40 or more to improve piston ring wear resistance without peeling.

A separate solid-lubricant applicator coats the cylinder bore so a strong sealing ring can handle high pressure with less wear and leakage.

Conical ring surfaces and a groove-base projection control piston ring movement to limit blow-by, oil loss, and carbon buildup.

Using DLC on the running surface and chromium on the flank surface cuts wear and friction while avoiding more complex full-surface coating.

Asymmetric corrugation lets the oil scraper ring spacer spring deflect under thermal expansion, preventing groove jamming and wear.

A curved upper scraper ring and MF expander spring deflect oil toward the groove base while reducing friction and oil coke formation.

A segmented scraper ring, support ring, and expander spring reduce cylinder-wall friction while maintaining oil scraping and limiting wear.

Alternating low- and high-temperature PVD carbon layers balance chipping, wear, friction, and peeling resistance in thick coatings.

A hydrogen-free amorphous carbon ring coating cuts wear across different cylinder materials by limiting combined hardness and tuning Raman ID/IG.

Multiple chamber discs with preconfigured wiper ring play block oil transfer along the piston rod, reducing contamination and downtime.

A Cr-B-Ti-V-(Mn,Mo)-N coating helps piston rings cut friction while resisting cracking, peeling, and wear under severe engine conditions.

A rotation-symmetric ring groove region simplifies elliptical piston machining, cutting burrs, wear, and production effort.

Pre-formed tapered and protruding wire surfaces create a sharp ring corner, giving uniform narrow contact width, higher surface pressure, and better oil scrape-off.

A circumferential groove and projection formed after molding helps laminated syringe gaskets avoid scratches, maintain slidability, and prevent drug leakage.

A curved running surface and convex flank transitions improve oil deflection to the groove base while maintaining uniform scraping contact.

Colored thermal-sprayed layers on a two-stroke piston ring reveal wear stages by visual inspection, avoiding complex ultrasonic checks.

A three-radius running surface contour spreads piston ring wear more evenly, improves sealing contact, and lowers blowby risk.

Apertures and recesses around the pin bore cut steel piston mass while finite-element optimization preserves strength and lowers fuel use.

A keystone second ring groove prevents carbon buildup and ring sticking in high-temperature pistons while keeping other grooves rectangular to control cost.

Cross-linking imide polymer lubricant films cuts wear under poor lubrication and high speed while improving bearing fretting resistance.

A TaC-coated compression ring leaves a defined joint area uncoated to block hot gas exposure, reducing chipping, spalling, and wear.

A circumferentially graded oil channel stores and releases oil at top dead center to reduce piston-liner rubbing and seizure.

An orthogonally compliant piston ring shifts between elliptical and circular forms to cut friction, leakage, and ring stress in compact radial piston machines.

Articulating arc segments and spring elements let a floating piston ring maintain hot-cold fluid separation during thermal expansion and vessel deformation.

Asymmetric and symmetric segment profiles control oil film thickness, cutting oil consumption at high speed without raising ring friction.

Fine carbide dispersion and nitrided side surfaces help this steel piston ring resist thermal setting and ring groove wear at 300-400°C.

Fine dross projections on the segment inner surface engage expander spacer ears to stop rotation and reduce oil consumption at lower ring tension.

A variable-depth, graded oil collection channel stores and redirects oil to the ring belt and liner, reducing piston seizure at top dead center.

A PTFE-PFA-filler sealing composition cuts pressure creep and cold flow while preserving chemical and temperature resistance.

An axial step in an added piston groove improves oil scraping and return to the crankcase while avoiding a separate machining step.

A tapered beveled side rail makes top-bottom orientation clear during oil ring assembly while reducing cylinder friction and oil consumption.

A boron-containing laminated hard carbon film simplifies piston ring coating formation while improving adhesion, surface finish, and wear resistance.

A two-layer DLC coating balances hardness, roughness, and stress to cut wear and reduce cylinder liner scoring under thin lubrication.

Combustion pressure drives water through the piston to lubricate the sealing ring, avoiding oil slip and particulate formation in hydrogen engines.

A tightly curved running surface redirects oil toward the piston ring groove, improving scraping efficiency and reducing oil consumption.

A two-angle tapered bevel makes side rail orientation easy during oil ring assembly while maintaining low cylinder friction and oil scraping.

A multilayer PVD DLC/CrN coating improves cast iron piston ring adhesion and wear resistance by combining nitriding with polishing and lapping.

A closed spacer groove and space-forming structure keeps oil flowing between side rails and expander while limiting carbon sludge buildup.

A PEEK-PTFE injector piston seal improves sealing in high-salt or alkaline fluids while scraping wall crystals and resisting wear.

Circumferential grooves in the spacer expander create oil flow paths that prevent sludge sticking and preserve sealing in low-tension oil rings.

Wear openings in segmented compressor packing rings equalize pressure, cut friction and wear, and sustain sealing over service life.

DLC on the running surface and chromium on the flank cut wear, groove friction, oil consumption, and blow-by in piston rings.

A larger lower groove diameter than the recess improves oil wiping, ring guidance, and oil discharge without letting oil flow into the piston.

A gradient CrMoXN multilayer coating cuts piston ring friction while maintaining adhesion, hardness, and 80 μm wear life.