Gear Lubrication/Cooling TRIZ Cases

Particle counting plus capture analysis helps distinguish wear damage from lubricant pollution, enabling earlier maintenance with fewer shutdowns.

Different radial and compression seals isolate engine-driven and electric pump flow paths, reducing pressure interaction and tolerance-related misalignment.

A shared oil circuit links robot transmission and bearing modules to equalize oil quality, extend service life, and simplify maintenance.

Pressure-based impending and full-bypass indicators warn of oil filter clogging early, helping prevent oil starvation and unnecessary maintenance.

Inner-wall grooves guide lubricant to the gear back side, reducing seizure risk and improving differential case durability at high speed.

An elevated auxiliary nozzle lets gravity-fed oil reach helicopter transmission bearings when the main lubrication circuit fails.

A two-stage oil pump with direct and switchable electric drive delivers low-pressure cooling and high-pressure clutch actuation without oversizing.

Adding correction pressure during second-pump stop or low-speed switching prevents temporary CVT hydraulic pressure drops and ratio disturbance.

Temperature-based lubricant switching balances friction element durability with lower stirring resistance, drag, and oil pump loss.

Fine guiding and holding grooves improve boundary lubrication in strain wave gears, suppressing fretting wear under low-speed high-load operation.

Laser-formed indentations filled with dry-film lubricant protect gear-contact bearing surfaces from cavitation, wear, seizure, and fatigue.

Axially shifted guide-ridge tops spread snap-fitting force in a transmission vent end-piece, easing insertion while preventing tab deformation.

A float-controlled connection line keeps the first transmission oil reservoir at a set level, preserving lubrication while limiting drag torque.

Separate high-pressure actuation and low-pressure cooling circuits cut leakage, drag losses, and accumulator complexity in transmissions.

Pressure differential, gravity, and check valves return transmission oil without scavenging pumps or intermediate tanks, cutting layout complexity.

Different helical angles and axially movable planet gear sets improve load sharing and torque transfer in compact differential planetary gearboxes.

Temperature- and speed-based lubricant control cuts transmission drag while protecting friction element durability under thermal load.

Integrated fins and valve-free passageways cool transmission fluid passively, cutting actuator complexity while improving heat transfer.

A nested oil passage in the cam plate lubricates roller-cam contacts to prevent fretting wear without creating weak thin sections.

Integrated fins and axial grooves use airflow to cool bearing and gear heat in a perpendicular speed reducer without complex lubricant circulation.

Inclined discharge passages in a double helical ring gear guide lubricating oil outward, reducing oil reservation and churning loss.

Pressure-switch feedback and solenoid pump control cut excess transmission flow, reducing spin losses while improving clutch fill response.

A casing guide and block structure slows pump-discharged oil, limits splashing, and keeps lubrication flow reaching the supply hole.

A rotating oil stirring box scoops oil from a low sump and delivers it to gear meshing points, improving lubrication while limiting stirring loss and leakage.

A warped lube feed ramp guides oil from the bearing into a channel, maintaining pinion bearing lubrication at low ring gear speeds.

A hydraulic pump sprays gearbox oil onto pile driver bearings before startup, preventing dry running, wear, and early failure.

Pressure-switch feedback and feed-forward pump control cut excess transmission flow, compensate leakage, and reduce shift response delay.

Captures centrifuged oil from the differential housing wall and redirects it to the planetary gear cage for stable high-speed lubrication.

A temperature-driven displacement body adjusts gear oil level automatically to cut splashing losses while maintaining reliable lubrication.

Switching torque-converter oil pressure by damper clutch state maintains lubrication while cutting pump load and energy use.

Relative movement between a distributor and integrated lubricant channels feeds meshing tooth flanks precisely, reducing wear and tribo-corrosion.

Timed update and hold regions in pump speed feedback suppress overspeed in a second pump and stabilize discharge pressure.

Backup valve state monitoring distinguishes emergency oil supply from full lubrication circuit failure when pressure changes are too small to classify.

An internal impeller pump keeps bearing lubrication stable during gearbox orientation changes, reducing wear and downtime in tight rotorcraft layouts.

A rotationally symmetrical support ring routes oil through a housing-closed groove, easing gearbox assembly and avoiding bore alignment errors.

Retaining springs or magnets lock the hydraulic piston at end positions so lubricant and cooling flow paths stay reliable even when motion stops.

Separate high-pressure clutch actuation from low-pressure cooling flow to cut leakage, drag losses, and transmission power waste.

A flow-guiding wall redirects hot hydraulic fluid into an intermediate space to cool the bridging clutch and reduce friction lining wear.

By integrating two sun gears into a common driveshaft, this transmission cuts separate gear assembly steps, tooling needs, and production cost.

Gravity-fed oil and forked sprocket applicators improve chain lubrication coverage, reducing wear and corrosion in off-road vehicles.

Adding a calibrated speed offset to the second pump keeps discharge pressure below the limit, easing first pump load and improving fuel efficiency.

A radial oil passage between trunnion pistons keeps toroidal CVT lubrication effective while shortening the shaft portion and cylinder.

Step surfaces in the worm housing and shaft create a labyrinth that keeps grease at the meshing teeth and out of the bearings.

A sheet-metal valve housing and form-fitting support element cut cost while preventing deformation and enabling reliable transmission pressure compensation.

Dual-mode clutching lets one gear act as both idler and pinion, expanding EV gear ratios without increasing transmission package size.

Varying journal pin stiffness along the bearing length matches planet gear deformation to stabilize oil film thickness and pressure.

A one-piece ring gear with a channel-mounted collapsible bushing replaces large bearings, cutting gearbox size, weight, and cost.

Closely facing housing and worm step surfaces form a labyrinth that keeps grease at the gear mesh and away from rolling bearings.

A recessed planet wheel and arc-shaped carrier flange keep lubricant in the planetary gear, reducing friction and wear in handheld power tools.

A two-tank oil circuit separates air from foamed return oil before clutch reuse, improving cooling and reducing drag losses.