Rotary Piston Pumps TRIZ Cases

Elastic impeller deformation cushions cavitation shocks, reducing stress and allowing tighter clearances to increase pump efficiency.

A variable displacement pump adjusts stator position via hydraulic thrust chambers to regulate fluid flow and pressure distribution.

An axial kidney-shaped inlet fills chambers via inertia while a circumferential outlet recess expels liquid using centrifugal force to reduce pressure losses.

A spark erosion machine features a movable offcut support that collects detached workpiece segments.

A liquid pump design relocates the shaft seal to a low-pressure inlet chamber while an elastic member maintains sliding contact between an inner cover and gear axial surfaces.

Decreasing screw pitches in a stator-rotor pump maintain positive pressure, preventing bubble generation in volatile fluids.

Rotating rings in a variable vane hydraulic pump adjust displacement via an linear actuator, reducing power losses from multiple energy conversions.

A recess in the slide surface increases clearance between the ring gear and housing.

A suction-side area on the screw rotor side wall eliminates gate contact during the transition phase.

A gear pump with a displaceable cover expands its chamber volume to accommodate liquid expansion during freezing.

A vane pump rotor uses annular grooves with varying pressure areas to axially press the shaft, improving sealing performance.

Asymmetric bearing fit manages rotor thermal expansion in roots pumps, preventing housing contact and maintaining optimal clearance.

Asymmetric rib placement minimizes pressure pulsations and stabilizes the discharge rate of variable displacement vane pumps.

Enlarged groove diameters prevent bottom portion deflection during swaging, maintaining adhesiveness and volumetric efficiency in rotary compressors.

A vane pump uses a pressure relief groove to communicate working chambers, suppressing abrupt reed valve opening and noise generation.

An integrated aluminum Oldham ring with a wear preventing member resolves friction degradation from material contact while reducing compressor weight.

Segmented cartridge replaces stator and rotor to prevent contamination during formulation switching.

A vacuum pump uses a relief channel to discharge lubricating oil during reverse rotation.

A rotary compressor blade features a hollow portion that enables elastic bending to increase surface contact area.

A thrust bearing driver couples a motor shaft to a pump gear using interlocking posts and slots, reducing fretting wear in low-lubricity fuel.

A vacuum scroll pump offsets axial loads on the orbiting plate via a counterbalancing chamber, extending bearing life and simplifying architecture.

A pressure keeping mechanism changes flow path area to increase compression chamber pressure swiftly.

Integrating a suction passage within the rotation shaft eliminates recessed housing paths that deform the stator core, thereby preserving motor output power.

Segmented inlets optimize airflow and cooling efficiency during hover mode without increasing structural complexity.

A vane pump uses a bimetallic locking element to mechanically block vanes and prevent overheating.

Reversing the rotor upon shutdown closes the inlet valve quickly, preventing oil backflow during low temperature operation.

Opposing torque vectors from dual motors stabilize hydraulic pressure, reducing leakage and eliminating gear noise without voltage converters.

Segmented back pressure grooves manage oil flow to sliding vane heads, reducing power consumption during suction.

A scroll pump cooling conduit conveys gas through the scroll body to dissipate heat.

Radial recesses on a vane pump rotor face provide dynamic servo control geometry, reducing pressure pulsations and suppressing noise in hydraulic systems.

Sliding end vanes divide a sloped annular channel into inlet and outlet chambers, resolving maintenance difficulty while preserving sealing effectiveness.

A rotary compressor arrangement uses eccentric guiding means to entrain a cylindrical piston while maintaining continuous contact with the housing.

A rotary shock absorber element insulates the stator and rotor from vibration transmission, reducing operating noise in vehicles.

A hydraulic gear pump radial pressure compensator uses spring cavities and check pins to reposition crescents.

A valve device lowers pressure on one pressure plate to reduce wear while maintaining sealing performance.

A gear pump bearing sealing portion maintains constant fluid volume between rotating teeth to prevent cavitation damage.

Integrating the end plate with the housing bottom reduces suction channel steepness, preventing oil flow deflection and sealing surface deformations.

A rotary compressor positions a suction pipe connection member radially outward to protect the cylinder blade hole from structural damage during assembly.

Eccentric circular grooves on a rotor thrust surface facilitate oil film formation through a hydrodynamic wedge effect.

Mechanical valve adjusts discharge port aperture based on pressure differential to eliminate over-compression and improve efficiency without external controls.

Elastic projection seals air channel during idle periods, eliminating filter flow resistance and preventing dirt backflow into pump housing.

Direct stator mounting eliminates resin layers to minimize air gaps and boost motor efficiency in compact designs.

Segmented main rotor lands with varying wrap angles resolve the conflict between high compressor output and gate rotor mounting constraints.

A sliding vane compressor uses a bottom-mounted vent hole and guiding passage to exhaust compressed refrigerant directly from the compression cavity.

Segmenting gas and liquid communication grooves prevents temporary lubricant blocking during orbiting, ensuring consistent bearing supply.

Switching valves control pressure pockets in internal gear machines to manage bearing modes.

Integrating a variable volume ratio valve into the drive hub simplifies assembly complexity and reduces manufacturing costs for scroll compressors.

A volume index valve piston adjusts bypass flow automatically to control compressor vapor pressure.

An axial ring actuator adjusts eccentricity inside the pump housing, reducing built-in space while maintaining hydraulic pressure.