<p><span>The goal of this thesis is to develop a computationally inexpensive, accurate, and&nbsp;</span>practical mathematical model of a hydraulic reed style check valve. While the modeling of&nbsp;disc style check valves is well represented in literature, reed valve modeling research has&nbsp;focused on applications in air compressors and internal combustion engines, where the&nbsp;working fluid has low density, viscosity, and bulk modulus. However, in a hydraulic&nbsp;system, the fluid – namely oil – is dense, viscous, and stiff, contributing additional physical&nbsp;effects that must be considered. Furthermore, the operating pressure in hydraulic systems&nbsp;is higher than in pneumatic systems, creating additional challenges from a structural perspective.In this thesis, a one degree of freedom hydraulic disc and reed style check valve model were developed using a hybrid analytical, computational, and experimental&nbsp;approach. The disc valve equation of motion was derived from Newton’s second law&nbsp;applied to the disc considering forces including pressure, spring reaction, and drag. Euler-Bernoulli beam theory was used to derive the reed valve equation of motion. In each case,the valve flow rate was modeled as quasi-steady orifice flow using an empirical discharge coefficient.</p>

Modeling and Experimental Validation of Disc and Reed Style Check Valves for Hydraulic Applications PDF

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