Abstract
For studying the kinetic characteristics of passive shuttle check valve at the moment that it closes its valve core on the condition of high pressure differences, this paper first constructs the equation of motion of the valve core and twodimensional geometrical model by using computation fluid dynamics method, then with the help of the calculation method and physical model provided by Fluent software, employing the dynamic mesh and user-defined functions, simulates the unsteady flow in the valve core’s closing process under the different pressure fluctuations, and obtains the stress nephogram, the velocity vector diagram, the speed curve, and pressure curve of the interior flow field of the valve. The results show that the bigger the value of valve fluctuation is, the larger the fluid pressure that the valve core is subjected to, the openness of the core and the speed fluctuation of the core are, and that in the case of sudden decompression at the entrance, the core can be shut down quickly with the steady speed field and pressure field. The simulation results are conducive to the design and optimization of structure parameter of shuttle check valve.
Highlights
The shuttle check valve invented by Zeng Xiangwei can automatically open and close itself under the control of the energy of the pipeline system, needing no extra power or control
Li Liangchao [7] finished the numerical simulation of the opening process of shuttle valves; Chen Kun [8] analyzed the characteristic of the water attack in the shuttle valve pipe system; RenYuxin [9] simulated the noise-reduction feature of the shuttle valve
The numerical simulation of the closing process of the shuttle valve is done under the condition of the pressure differences between the outlet and inlet being 0.4 MPa, and the elastic coefficient 6000 N/m
Summary
The shuttle check valve invented by Zeng Xiangwei can automatically open and close itself under the control of the energy of the pipeline system, needing no extra power or control. Few studies on the valve score’s activity during the closing process of shuttle valve under the fluctuant pressure have come out. It is necessary to study the impact of the pressure differences between the inlet and the outlet upon the closing process of the valve. When the pressure of the fluid from the left is less than the pressure of the fluid from the right and the spring’s acting force, the spool will move to the left and the valve is closed and backflow is prevented. Because the closing results from the spring’s force and the pressure differences of both sides, the shuttle check valve can act as non-return function even in the case of the lowest backpressure [10]. Speaking, the shuttle check valve can function as opening and closing, throttling, damping, and amplify regulator and controller
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