Modeling of a fast plate type hydraulic check valve

Check valve dynamics plays an important role in many fluid systems, like in compressors, hydraulic pumps, and hydraulic switching converters. Plate type check valves are a frequently employed valve type in dynamically challenging cases. Despite the relevancy of plate valve dynamics, few exhaustive work can be found in literature, focusing on the behavior of hydraulic check valves for high frequency applications. This paper presents an in-depth characterization of a plate valve designed as rectifier of a High Frequency Oscillation Pump working at 300 Hz. The aim is to identify a sufficiently simple mathematical model, which permits to optimize the design of the valve for the considered application. The paper analyzes the different phenomena contributing to the dynamics of such a valve, and presents the results of simulation and experimental activity. The results show how small details in the design and manufacturing of those valves (namely the contact surfaces) have important consequences on the dynamics of the pump system. In general, a good agreement between model and reality is achieved.