Positive-Displacement Liquid Engines TRIZ Cases

See how a gas quantity adjustment unit switches working gas volume between parallel channels to

A conduit-and-collar seal assembly blocks lubricant leakage at the engine block and gearbox interface while protecting the gasket under heat and pressure.

Anti-rotation bodies lock a replaceable hub insert in a fluid pump cylinder block, restoring spline reliability while enabling remanufacturing.

A slidable pump mounting lets the coolant tank be cleaned through the upper opening without removing pumps or wires, cutting maintenance time.

Silicon nitride ball ends cut pump weight while preserving wear resistance and lowering friction to extend piston pump service life.

A tuned pitch-circle-to-piston ratio and piston spacing cut flow pulsation noise while keeping the axial piston pump compact and durable.

Relative rotation of the port block and cam ring varies pump capacity while avoiding the bulky axial cam-ring mechanism.

Cross-connected cylinders synchronize movable bearing housings to prevent roller skewing, flange contact, and difficult hydraulic maintenance.

A piston spanning opposed cylinders turns a cantilevered pump layout into a simply supported one, cutting bending stress and wear.

Actuators apply speed-dependent counterforces to piston sleeves, balancing tilting torque and preventing hydraulic leakage at high rotation.

A housing-integrated pre-compression chamber cuts pressure pulsations in a slanted-axis axial piston pump for quieter, self-priming high-speed flow.

A hydraulic stopper stays pressed against the swash plate to prevent separation, suppress knocking noise, and smooth pump operation.

A flexible conduit and intermediate chamber with a high-pressure NEG pump cut turbomolecular vibration while preserving compact, efficient evacuation.

A same-side brake piston and bearing layout compacts the hydraulic machine while preventing piston rotation and simplifying housing manufacture.

A nested in-casing park brake cuts axial growth in radial piston units while protecting the brake, simplifying assembly, and reducing leakage points.

Nonzero cam-section angles and flexible piston-lobe counts keep fluid volume proportional to rotor angle while reducing pressure peaks.

A high-pressure NEG pump inside an intermediate chamber limits turbopump vibration while preserving evacuation speed, compact size, and lower energy use.

Fitting pins with a slotted recess align axial piston machine housing parts accurately while avoiding assembly stress and seal deformation.

A load-bearing air canister under the foot pump and a protected front turbine layout cut frame weight while improving stability and portability.

A barrel-shaped shaft joint lets an electro-hydraulic unit absorb shaft bending while keeping the cylinder block parallel for unobstructed flow.

Moving the direction-changing drawer off the rotation axis simplifies manufacture and helps limit internal leakage in a two-displacement hydraulic machine.

Vacuum suction lifts bottom sediment through a separator and submerged filter, avoiding surface-dependent capture and extra filtration.

A co-rotating swash plate and retention cage help limit piston side loading, contact stress, friction, and heat.

A single retaining ring secures every pump cover, replacing multiple screws to simplify assembly and preserve retention under high pressure.

A floating cup hydraulic transformer uses separated face plate passages to widen operation while limiting friction and leakage.

A fluid pump valve plate uses separated notches between kidney slots to cushion pressure changes, reducing noise and cavitation erosion.

A silicon nitride pump barrel uses hydrodynamic sealing to reduce friction, preserve bore diameter, and extend service life.

Segmented seal rings with interference fits prevent rotation in radial piston motors, extending service life and enabling continuous operation.

An intermediate tank absorbs hydraulic fluid discharge to eliminate Joukowsky shocks and costly pressure intensifiers.

Adjustable stop arrangement constrains pressure shoe movement to reduce friction force during start-up, lowering motor torque requirements.

A bent-axis machine shifts its minimum pivot angle by 5° to expand the operational range and increase displacement volume.

Radial cartridge passages shorten axial length, enabling full +100% to -100% swashplate pivoting range.

Pulsed UV LEDs and airflow structures disinfect compressor tanks, eliminating mercury lamp vibration hazards.

Segmented variable wobbler body with relief angles reduces mass while maintaining structural integrity in aerospace drive generators.

A high-pressure pump cam contour uses a sinusoidal curve during the suction phase to optimize fuel filling behavior and delivery rate.

A pump undercut interrupts brake fluid transmission paths, preventing capillary ingress into the electric drive motor.

Segmented primary pumping groups with different inertia characteristics lower pressure in load-lock chambers while minimizing total evacuation time.

A wobble plate mechanism adjusts piston stroke to vary engine displacement while maintaining a constant compression ratio.

Single-piece tappet design eliminates separate connection interfaces to prevent deformation and chip formation under high pressure.

An eccentric pivoting axis generates a counter moment to pivot the swashplate, eliminating directional control valves and reducing equipment complexity.

A sliding contact member on the valve plate reduces frictional forces between the cylinder block and rotating shaft.

Dynamic swash plate rotation compensates for non-uniform piston movements, aligning valve timing with piston positions to improve efficiency.

Segmenting the connection plate creates space for a sealed fluid volume, reducing leakage risks and pressure pulsations in the hydraulic system.

A pressure compensating pump uses a tension spring to de-stroke the swashplate and adjust fluid flow based on system demand.

Adjustable piston phase timing in radial fluid devices controls flow without increasing cam force or energy consumption.

A coaxial pumping unit uses epicyclic gearing to drive volumetric and centrifugal pumps at different speeds.

A control plate uses asymmetric sealing ridges to manage pressure distribution and reduce centrifugal forces.

Two slides in a bore connect radial ducts to main enclosures, enabling three distinct cylinder capacities without increasing radial size.

Magnetic pulse welding joins high-strength steel and low-density ceramic components to reduce inertial forces in axial piston machines.

Locating the scanning surface on the swash plate resolves the conflict between measurement precision and compact pump size at high volume flows.

A hydraulic balancing chamber connects to the delivery aperture to exert compressive force on the pump barrel.