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access icon openaccess Study on hydrodynamic numerical simulation and radical offset characteristics of outflow cone valve

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 02/10/2018, Accepted 12/10/2018, Published 22/10/2018

Aiming at the complicated internal flow state of hydraulic cone valve and the effect of fluid force on the performance, radial offset was seldom considered in the research of cone valve, so the inner flow field model of cone valve was established by UG software, and the mesh model was divided by ICEM CFD software. Then, the simulation calculation was carried out by FLUENT. The distribution of steady-state flow force, pressure field, and velocity field under the different opening of the cone valve was obtained. In order to verify the correctness of radial offset, the hydraulic simulation under the same working condition was carried out by AMESim software. Finally, the radial force on both sides of valve core was calculated on the basis of the pressure field on both sides of the valve core. The results show that the radial force difference on both sides of the spool is small when the valve port is small. With the increase of the valve port opening, the radial force difference between the two sides of the valve core changes larger, and finally fluctuating within a certain range. Then, the radial offset value can be calculated by the radial force formula. According to the obtained offset, the simulation and experimental study on the cavitation of the cone valve are carried out. The simulation results of radial offset are verified according to the distribution position of the cavitation, which lay the foundation for the design and performance research of the hydraulic poppet valve.

Inspec keywords: hydraulic systems; mechanical engineering computing; numerical analysis; computational fluid dynamics; valves; flow simulation; hydrodynamics; cavitation; hydraulic control equipment

Other keywords: radical offset characteristics; inner flow field model; steady-state flow force; hydraulic cone valve; valve core changes; radial offset value; pressure field; radial force formula; valve port opening; radial force difference; hydrodynamic numerical simulation; outflow cone valve; complicated internal flow state; hydraulic poppet valve

Subjects: Numerical approximation and analysis; Fluid mechanics and aerodynamics (mechanical engineering); Applied fluid mechanics; General fluid dynamics theory, simulation and other computational methods; Mechanical components

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