Experimental Study on the Effect of High-Pressure Inflow on the Performance of Wankel Pump: Exploration of the Gravity-Pump Pressure Collaborative Dynamic Loading Method

The impact of high-pressure inflow on water pump performance is crucial in determining whether the gravitational potential energy effectively synergizes with the mechanical energy of the pump. Using an independently developed Wankel pump and test platform, we conducted a preliminary demonstration of the gravity-pump pressure collaborative dynamic loading method. The Wankel pump demonstrates excellent performance under self-priming conditions with high-pressure and high-flow rates. The power decreases linearly with increasing inlet pressure during high-pressure inflow, while maintaining acceptable flow fluctuations. This demonstrates the feasibility of the driving method. The trend of total efficiency with inlet pressure is primarily determined by mechanical efficiency, while volatility is influenced by both volumetric efficiency and hydraulic efficiency. The descent stage’s slow fluctuation range plays a critical role in determining the range of utilization of gravitational potential energy, and it is influenced by the target flow rate.