Rotary Piston Pumps TRIZ Cases

A segmented pressure relief groove in a vane pump bottom wall allows adjacent working chambers to communicate via internal air leakage.

Varying the locus circle diameter along the trochoidal curve widens the addendum area to suppress abrasion while reducing gear rattling noise.

Uneven running clearance distribution in the key coupler prevents rotational backlash and enhances alignment precision.

An internal-gear pump uses a pivotable ring element to switch fluid ports, eliminating complex check valves and central control units.

An installation tool uses cam surfaces to uniformly deform rigid impeller blades, preventing damage during water pump assembly.

Molded sealing lips and scraping edges on rotors prevent deposits and clogging in solid-liquid mixtures.

A rotor shaft and pinion assembly uses conical surfaces and segment pockets to establish a secure, non-rotatable mechanical connection.

Segmented back pressure supply channels apply selective hydraulic force to vanes, reducing drive torque and improving high-pressure efficiency.

A scroll compressor adjusts oil flow through a solenoid valve to manage back pressure chamber conditions.

A segmented container assembly uses an elastic element to absorb fluid expansion from freezing, preventing damage to the power transmission system.

A hollow disc pump uses a spring-loaded pivot to create variable eccentricity, enabling self-priming aspiration of viscous fluids and solid particles.