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Commercial Computational Fluid Dynamics (CFD) code ANSYS/Flotran has been used to simulate hydraulic oil flow inside valves. The fluid flow inside valve is treated as turbulent and adiabatic or iso-thermal. The CFD simulations presented in this paper have been carried out for the purpose of predicting hydraulic oil flow pressure drop inside hydraulic valves under certain operating conditions with the aim to minimize the pressure losses. The complete simulation procedure will be presented from parametric geometry creation with a 3-D solid CAD through final post-processing of results. Simulation results of different multiple-spool monoblock hydraulic valves are included. CFD simulation results are compared to experimental results. Some CFD model mesh sensitivity analysis result is also presented.

HUSCO's patented CompChek® valve technology provides independent, individual flow compensation in hydraulic directional control valve circuits, while maintaining the specified flow relationships between individual functions, even when total demand exceeds pump output capacity. HUSCO is currently in the process of incorporating this technology into a number of existing product lines, without the addition of complicated components, or changes in envelope size. This paper presents the principles behind this technology, and how they are applied to improve mobile hydraulic machine performance.

Hydraulic control valves for mobile equipment can now be selected from a multitude of options in a matter of minutes with the ValveCad™ software package for AutoCAD® drawing systems. ValveCad makes the process of designing complete valve systems quick and easy with simplified pop-up menus. Users can create scalable valve assembly dimensional drawings, including graphic symbols, in a matter of minutes. The software also includes parts lists, pricing, and distributor locations.

This paper describes a method of using Computational Fluid Dynamics (CFD) computer simulations for hydraulic oil flow inside hydraulic valves. The main objective is to study hydraulic forces induced by oil flow on the actuators of hydraulic valves with the aim of minimizing their effects. Integration of solved pressure and velocity fields from CFD simulation solutions over related valve component surface areas was employed to obtain the desirable Flow Induced Force (FIF). Different valve metering geometry has been simulated using a commercially available ANSYS/FLOTRAN CFD software program. The hydraulic oil flow inside valves is assumed steady-state and in a turbulent mode. The complete simulation procedure is presented from parametric geometry creation with 3-D solid CAD modeler of Pro/ENGINEER through final post-processing of results. Simulation results of three hydraulic valve applications are presented. Tests have been performed to measure FIF and oil flow rates.