Rotary Piston Pumps TRIZ Cases

A controlled mixing valve adjusts flow distribution through a cooler and bypass to prevent condensate formation in oil-injected compressors.

An intermediate chamber mediates fluid return from a bypass port, reducing pulsation and minimizing pressure loss.

Merging the 3D rotary sensor onto a single controller circuit board eliminates inter-board connections, reducing device complexity and manufacturing costs.

Optimized bearing journal diameters and controlled transition angles reduce inlet pressure loss for highly viscous polymer melts.

Dynamic adjustment of rotational rate limits based on operational duration maintains mean speed, ensuring reliable oil separation while reducing component wear.

A screw compressor uses a bypass port and valve to adjust the internal volume ratio during operation.

A straightening member segments the oil pump suction passage into independent paths, preventing cavitation from uneven flow rates.

Hydraulic pressure compensation in the motor compartment balances axial rotor forces, reducing mechanical friction and leakage while dissipating heat losses.

A gear pump introduces a damping layer between the driving gear and pump cylinder to eliminate collision noise and wear.

Selective oil communication via a vane groove reduces frictional resistance and thermal expansion, extending component lifespan in rotary compressors.

Alternating injection with drying periods prevents aluminum alloy corrosion and activation failure while maintaining thermal efficiency.

Dynamic control of motor power via exhaust gas and stator temperature monitoring prevents rotor-stator clashes without external cooling mechanisms.

Stationary combustion chamber housing isolates valve mechanisms from rotating pistons to reduce mechanical stress and simplify engine design.

A circular piston limiting structure prevents auto-rotation by using a separate member to abut the piston surface, avoiding clearance volume introduction.

An annular plug with a center bore reduces friction while maintaining pressure against the end cap, resolving leakage trade-offs.

Sliding end vanes bias against a reversible cam body to segment chambers, resolving maintenance difficulty and seal integrity issues in rotary compressors.

A gear pump sealing assembly uses a recessed O-ring and flushing channels to maintain integrity.

A brake ring intercepts load reversals from pressure fluctuations, maintaining uniform gear pump flow.

Spring biasing secures the pump cover and stator in a retaining channel, eliminating thermal expansion stresses and manufacturing waste from external fasteners.

Unequal tooth counts on drive and driven gears reduce sliding velocity and wear while maintaining flow rate and minimizing pressure ripple.

Differentiated compression chamber volumes balance torsional moments to stabilize the orbiting scroll in a stepped scroll compressor design.

A scroll compressor eccentric shaft uses a base seat portion with a press-fitting hole to enhance structural strength.

Integrating the controller near the electric motor eliminates long cabling that acts as an antenna, reducing electromagnetic interference.

Stepped roller vanes eliminate rubbing motion between vane tips and ring contours, enabling higher operating pressures without reducing power density.

A movable valve switches between two lubricant feed ports in a screw compressor, ensuring reliable oil injection across varying compression chamber pressures.

A vane pump rotor body uses a radial friction bearing to reduce device complexity while maintaining reliable axial positioning.

Pressure-deformable diaphragm reduces pump power consumption by delaying flow cutoff.

Variable lap clearance with concave and convex portions prevents contact during thermal expansion while suppressing fluid leakage.

Integrating a drain chamber between control chambers eliminates axial passages, reducing pump size while maintaining reliable feedback control.

A compressor insert shapes fluid flow via an annular gap to improve coolant distribution and isentropic efficiency.

A reversible gerotor pump uses a locking pin in an eccentric ring to drive rotation direction changes.

Coaxial segments with angular offsets eliminate cyclic flow variations, resolving inlet dimension constraints for three helical designs.

A uniaxial eccentric screw pump stator uses a pressed-fit outer cylinder on a threaded liner to enable component separation without adhesives.

A silencer housing features an internal protrusion and multiple gas inlets to divide flow streams.

A scroll compressor fixed scroll integrates a flow-guiding passage to direct refrigerant entry smoothly.

Varying groove gap heights create pressure differences that rinse dirt particles and distribute lubricant to reduce adhesive wear.

An elastic gear chamber adjusts position under fluid pressure to maintain constant clearances and prevent reflux caused by gear wear.

A melt pump with counter-rotating worm conveyors builds pressure through mechanical compression.

A pressure relief valve connects a discharge zone to a control chamber in a variable displacement lubricant pump.

Segmented housing design uses a low rigidity zone to absorb motor fixation stress, maintaining orbiting scroll supporting surface accuracy.

Segmented prime movers drive fluid displacement members separately to prevent gear tooth grinding and contamination.

A scroll compressor uses a thick portion on the orbiting-side wrap to cover an injection port and prevent chamber communication.

A pump cooling line uses a calibrated conduit to draw working fluid from a high-pressure area for motor and electronic unit heat exchange.

A slide valve sealing projection stabilizes fluid pressure application areas on the valve body to minimize clearance with the screw rotor.

Dual control chambers enable selectable equilibrium pressures, reducing energy wastage and pivot pin wear across varying operating speeds.

A scroll compressor uses a decouplable orbital balancing mass to manage centrifugal forces during operation.

Suction-chamber segmentation separates the rotor-stator section from the drive connection, avoiding pipework disconnection during maintenance.

Asymmetric stepped portions on scroll compressor wraps enable earlier discharge communication for the higher pressure chamber.

Part-cylindrical rotor blade shoes with sealing scraping edges prevent particle crushing and deposit formation in solid-liquid mixtures.

Groove extends between outlet port and stepped bearing hole to form oil films on rotor components, eliminating air mixing during start-up.