Abstract
In modeling the characteristics of a cartridge valve with traditional methods, it is commonly required to determine the value of flow area and other coefficients such as discharge coefficient and jet angle, etc. However, these parameters often rely heavily on empirical or experimental data and often involve some uncertainties, especially with the variation of the spool displacement (valve opening). To avoid these uncertainties, this paper proposes a modeling method which calculates spool force and flow rate directly through the distribution of fluid field. Transient 3D flow field simulation with dynamic mesh technique is conducted using commercial code FLUENT, and Proper Orthogonal Decomposition (POD) method is introduced to simplify fluid field data. The results showed that the POD method can capture the main features of the fluid field while significantly reducing the amount of data. With reconstructed pressure field and velocity field, spool force and flow rate can be calculated directly without using traditional formulas which contain uncertain coefficients. Valve characteristics calculated with this method agree with Computational Fluid Dynamics (CFD) and experimental data well, which confirms the validity and effectiveness of this method.
Highlights
The cartridge valve is a kind of industrial hydraulic valve which can be used for directional, pressure and flow control
Given the problems mentioned above, the purpose of this paper is to develop a method to describe the flow force and flow rate characteristics of the valve in the whole opening range while reducing the uncertainties involved and amount of data needed. 3D Computational Fluid Dynamics (CFD) flow field simulation with dynamic mesh technique was implemented to get the detailed characteristics of the valve flow field at different spool displacements
The Proper Orthogonal Decomposition (POD) method is employed in modeling key characteristics of a cartridge valve
Summary
The cartridge valve is a kind of industrial hydraulic valve which can be used for directional, pressure and flow control Due to their advantages of being low-cost, leakfree, and having high flow rates versus a relatively small pressure drop, cartridge valves are widely used in industrial and mobile machinery (Fu, Wei, & Qiu, 2008). Modeling their characteristics accurately is essential for better understanding and application of cartridge valves. Flow force acting on the spool and flow rate through the valve can be calculated through the reconstructed fluid field directly.
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