Rotary Piston Pumps TRIZ Cases

A perforated inner conduit and outer shell damp screw compressor pulsations across variable frequencies while avoiding major pressure drop.

Bearing discs in rotor and cover cutouts seal shafts from pumped material while allowing clean-in-place cleaning and tool-free removal.

A rigid support frame counter-balances torque in a resilient rotor pump housing, preserving sealing and accurate high-rate fluid dosing.

Flexible gerotors and antiphase pulse attenuation smooth discharge flow while preventing leakage for accurate fluid dispensing.

Resin motor case and body, side-mounted attachment holes, and liquid lubrication cut pump weight, size, and sealing complexity.

A movable base unit sets impeller and star wheel clearance precisely, cutting wear and speeding cleaning-related pump adjustment.

A rigid-core, elastomer-overmold rotor improves trochoidal medicament pump sealing, dosage accuracy, reliability, and lifetime.

A two-stage separator uses centrifugal action and flow deceleration to remove oil from vehicle compressor gas streams in limited space.

A two-stage centrifugal and mesh separator removes bulk oil and fine mist from a vehicle rotary vane compressor to cut carryover and wear.

A non-rotating flanged journal bearing lets pump bearings be removed and reoriented easily, extending service life without special tools.

Cooled oil routed from the storage chamber to scroll sliding parts and bearings helps counter centrifugal oil buildup and preserve compressor efficiency.

Using a gerotor pump and external gear pump in one housing, this case avoids air leakage and acoustic issues in compact e-axle tandem pumps.

A cross-groove cylinder sleeve with double slide blocks improves exhaust timing, avoids dead points, and cuts compressor noise and energy loss.

A staggered return passage and suction-hole layout helps frozen oil flow back to the oil pool, improving compressor lubrication and reliability.

Weight inserts in a solid fiber composite vane raise centrifugal sealing force while avoiding costly over-molding and steel-core recycling issues.

Distance sensors on the connecting shaft track runout at different angles to detect bearing and joint wear before pump failure.

Periodic valve-controlled draining and refill keep liquid ring pump operating liquid clean, removing contaminants without stopping pumping.

A sealed magnetic coupling replaces wear-prone mechanical seals in eccentric screw pumps to contain toxic fluids and extend service life.

Extending the fixed scroll discharge cylinder beyond the cover improves pipe connection visibility, assembly reliability, and cooling.

A thermoplastic jacket and elastomeric lining are molded into one stator to cut pump manufacturing effort, energy use, and recycling barriers.

A cam ring protrusion overlaps the coil spring outer edge to prevent spring shift while simplifying installation in a variable displacement oil pump.

Using lubricated polymer screws and inserts cuts friction in screw pumps, improving fluid flow efficiency and reducing energy loss.

During pump deceleration, the drive motor acts as a generator to power other pump components, cutting energy use and overload risk.

An angled discharge casing separates gas and liquid for recirculation, cutting multiphase pump size, complexity, and energy waste.

Unequal hydrostatic pressure at the port plates recenters a vane pump rotor, reducing wear, heat, and efficiency loss without external controls.

Timed oil injection at lower compression pressure ratios keeps screw compressors cooled and lubricated without an oil pump.

A low-pressure chamber and transfer channel lower oil pressure in the second cavity, helping electric pump seals last longer.

A pressure-driven outer rotor offset reduces radial gap automatically, improving pump efficiency and stability at higher pressures.

Multiple step-shaped sections in the fixed scroll suction passage smooth refrigerant flow, reducing suction pressure loss with easier machining.

Hydrostatic port plates use pump exhaust pressure to apply differential axial thrust, keeping the vane pump rotor centered and efficient.

Grooves pre-pressurize pump cavities before discharge, smoothing oil outlet pressure and extending turbomachine lubrication component life.

Longitudinal holes, lateral slots, and casing recesses improve inlet-side fluid supply to cut cavitation and pressure pulsation at high speed.

A pressure-fed channel and shaft longitudinal passage lubricate both oil pump bearings, cutting leakage and lubrication system complexity.

Tin and nickel-phosphorus coatings with asymmetric scroll wall heights prevent adhesion and frictional heat while preserving airtightness.

Elongated valve cavities and slidable blocking elements increase compressor discharge flow area while reducing lift, pressure drop, and backflow.

A PCB-mounted sensor and rotor-linked magnetic element enable accurate electric pump rotation monitoring with less added control complexity.

A connecting assembly holds clearance between coaxial compressor rotors, preventing axial collision without extra thrust bearings or added size.

Differently shaped rotor sections and air holes create one-way axial force, enabling a single thrust bearing and a smaller compressor.

A drive finger and notch add radial force to the piston-cylinder interface, reducing micro-leaks and improving compression sealing.

Dynamic-pressure grooves and a buffer space on the movable scroll suppress high-pressure refrigerant leakage while maintaining stable slidability.

Variable rotor-stator feed lowers rest-state preload to prevent elastomer deformation, reduce starting torque, and avoid pump seizing.

Controlled speed ramping and pressure-rise analysis detect displacement pump wear and leaks without costly flow meters or pump damage.

A side-wall drain outlet and neck channel let liquid escape from the silencing cavity, preserving noise reduction when rainwater or oil enters.

V-shaped widening and reinforcing ribs cut local stress in a scroll compressor coupling, enabling higher rotor speeds with lower-cost powder metal.

A fixed-scroll suction hole is positioned to intermittently communicate with the working chamber, cutting suction loss while protecting tip seal retention.

Extending the fixed scroll discharge cylinder beyond the cover improves pipe connection access, visual inspection, and cooling.

An out-of-phase linear counterweight offsets anti-rotation mass in a scroll pump, cutting vibration and mechanical noise.

A split seal housing lets the shaft and counter ring be removed axially, avoiding pump and piping disassembly during seal maintenance.

A gate-biased discharge port and radially aligned case outlet improve compression efficiency and discharge flow in screw compressors.

A rotating baffle screw guides cooling water through mold channels to improve temperature uniformity, shorten cooling time, and reduce part deformation.