Oscillating Piston Engines TRIZ Cases

Radially separable metallic stator cores shrink-fit into casings to resist thermal degradation and reduce wear from expansion mismatch.

Mounting an anti-return device on the fixed volute lower surface simplifies installation while minimizing dead space volume and pressure pulsations.

A cold forged crankshaft uses a reinforced shaft unit to maintain structural rigidity in scroll fluid machines.

Segmenting the rotor into frusto-conical and curved zones improves sealing performance while minimizing fluid leakage and power wastage.

A multi-rotor fluid transfer engine uses sculpted lobes for uniform circular motion sealing.

A vane pump control ring adjusts displacement via opposing hydraulic forces to match output pressure.

Radially extending vanes seal against circular walls to reduce internal slip and increase output flow for low viscosity liquids.

A compression stroke with a 21 to 27 degree rotation angle gradually eliminates cavitation and prevents erosion in automatic transmission oil pumps.

A water lubrication air compression system uses a negative pressure mechanism to isolate oil and water circuits.

An expansion-decompression silencer integrates with the discharge joint to lower noise without increasing machine size.

Integrating radial and butt sealing bars with cylinders eliminates assembly gaps, improving leak tightness in rotary piston compressors.

Segmented thrust bearing grooves maintain oil film pressure, preventing seizure under high axial loads.

Meshing gears pump lubricant via a discharge orifice and fluid gallery, ensuring consistent supply without elevated fill levels that cause churning losses.

A partition wall restricts direct lubricating oil flow from the extraction passage to prevent pressure loss and improve system efficiency.

A rotary engine design uses a revolving piston to generate high torque at low RPM while maintaining continuous fluid flow through an annular cylinder.

Curved tooth profiles in trochoidal oil pumps reduce discharge pulsation and noise by optimizing inter-tooth space communication.

Integrally formed cylinder block housing a silencing and cooling device mitigates vibration-induced noise while maintaining structural rigidity.

A gear pump suction port features a shallow portion and deep portion to guide fluid into inter-tooth chambers.

Segmented hollow lobe rotors reduce mass and kinetic energy, enabling higher pumping speeds while maintaining structural integrity through local reinforcement.

Segmenting the rotor into a lightweight core and corrosion-resistant shell reduces manufacturing costs while maintaining downhole reliability.

A rotary machine arrangement uses matched thermal expansion alloys and axially floating components to maintain precise clearances.

Oil nozzle injection prevents air bubble transfer in scavenge gear pumps, maintaining volumetric efficiency and constant capacity.

A variable displacement pump suppresses excessive discharge pressure rises at high speeds by dynamically adjusting spring constants via a switching mechanism.

U-shaped sealing rings with specific cross-section dimensions prevent leakage during cranking and simplify assembly.

Pre-tensioned tension elements lock a segmented screw compressor rotor body onto the shaft, reducing material waste and enabling independent cooling channels.

Routing the injection tube through the suction chamber eliminates complex discharge chamber conduits and reduces seal requirements.