Rotary Piston Pumps TRIZ Cases

A variable displacement pump uses modulating members to adjust regulation pressure on actuation stages for efficient fluid delivery.

An intermediate piece mounts a retaining pin to an internal gear fluid machine housing wall.

Different diameter bearings in an overlapping housing stabilize the axial system, reducing friction and enabling compact pump miniaturization.

High-lubricity caps isolate Oldham coupling posts from friction, reducing wear and extending component lifespan in climate-control compressors.

Segmenting the pump housing from the connection housing isolates wear parts, enabling maintenance without disconnecting pipeline systems.

Hydraulically switchable coupling connects the vacuum pump rotor to the engine drive shaft via a control valve.

A supplemental oil reservoir and valve use compressor suction pressure to draw oil into the separator tank automatically.

Two internal gear pumps mesh externally on a common drive shaft to minimize sealing components and reduce mechanical friction losses.

Gear dimples in a rotary oil pump generate hydrodynamic lubrication films, reducing friction and extending longevity under high engine RPM.

Offset cavitation bubbles impart compressive residual stress to compressor scroll corners, preventing fatigue cracks where shot peening fails.

Internal gear pump channels lubricant through rotary bearings in both rotational directions, resolving bearing reliability issues during direction switching.

Segmented internal flow paths optimize viscosity and pressure for bearing lubrication and compression cooling, reducing rotation loss.

Displaceable pressure elements compensate for tooth tip play between rotors, reducing leakage and boosting efficiency without tight manufacturing tolerances.

Two-step deceleration prevents compressed air backflow and noise without mechanical check valves.

Segregated housing structure absorbs clamping forces to prevent shaft misalignment and bearing wear.

Two independent balancing masses oscillate about distinct axes to counteract gas forces, reducing vibration and noise across varying speeds.

Varying the cross-section of the cooling wind passage counteracts centrifugal force bias, ensuring balanced heat removal from both scrolls.

Symmetrical intake and discharge spaces balance pressure on the internal gear, reducing sliding friction and driving force requirements.

Pressure sensors detect cavitation severity in positive displacement pumps to adjust pump speed and prevent mechanical damage.

External motor synchronization eliminates direct element contact, reducing wear and maintaining tight sealing.

Merging the stator and rotor assemblies within one aluminum shell eliminates redundant casings to reduce overall volume and weight.

Actuators automate stator retensioning to resolve manual adjustment delays, reducing operating torque and extending service life under varying conditions.

Single-start Quimby screw rotors lower exhaust valve stress by reducing pulsation frequency, enabling higher rotational speeds without energy loss.

Separating radial support from axial sealing prevents frictional locking during housing expansion while maintaining effective fluid leakage prevention.

Segmented pump bodies with overmolded vanes enable rapid disassembly for cleaning, reducing production costs.

An integrated cooling system uses Venturi effects to cool the motor housing during low-speed operation, preventing overheating.

Stepwise speed profiling enables a screw compressor drive to generate an energy consumption map, eliminating lengthy test procedures and frequent recalibration.

Replacing reciprocating pistons with a rotating fusiform impeller minimizes friction and inertia losses while optimizing airflow efficiency.

A split power gerotor pump uses a floating outer rotor and wobble cancellation element to manage fluid flow.

Axially translating segmented rotor switches active pumping sections within a progressing cavity pump stator to maintain operational efficiency.

A polyethylene coating on a rubber stator enables aggressive solvent compatibility without expensive specialized materials.

Axial cavity arrangement resolves space constraints while centrifugal force removes refrigerant oil to boost energy efficiency.

Axially-oriented gas-supply holes align with the male rotor tooth channel to optimize refrigerant delivery into the compressor cavity.

A dual slide valve assembly controls compressor volume ratio and power input through independent movable members.

Radial discharge outlets in a rotary pump safety valve increase flow area to remove residual fluid, preventing hydraulic lock during cold starts.

Merges the closing cover and ventilation cap into one component to reduce assembly complexity and production costs.

A screw compressor slide valve mechanism uses multiple separate arc-shaped valve members to adjust cylinder opening areas.

Segmented fluid outlets with pressure-responsive blocking means seal external zones when internal pressure drops below a threshold, preventing backflow.

Integrated engine case channels accommodate the variable displacement oil pump control valve.

Raised portions on the frame support specific parts while a sliding clamp secures them, preventing incorrect component installation.

Exchangeable insert in pump recirculation line adjusts fluid delivery rate, resolving manufacturing precision versus retooling time trade-offs.

A compressor oil return unit supplies lubricant through a pressure reducing unit to distinct internal spaces.

Prestressed elastic element compensates for dimensional variations to maintain sealed environment across different feed pump displacements.

Pretensioned compensation plates in a gerotor pump minimize internal leakage and wear by dynamically adjusting axial gaps under hydraulic pressure.

Branching the lubricant circuit through a hollow body resolves compact housing constraints while maintaining component service life.

Active positioning device displaces the outer rotor to maintain fluid flow direction, eliminating friction losses from mechanical reversing elements.

An outlet chamber drain in a scroll compressor returns separated oil to the suction pressure chamber, resolving inadequate lubrication at low mass flows.

A detachable heating device attached to the rotor casing rear wall maintains fluid temperature and protects sealing arrangements from solidification damage.

Dual sound damping chambers linked by a bore arrangement reduce pump noise while minimizing installation space and manufacturing costs.

Sealing bridge integrates lubricant supply to rotor bearing, eliminating direction-dependent wear and seizure risks in reversible rotary pumps.