Simulation Of The Valve Port And Flow Channel Of Ceramic Tile Press Based On FLUENT

Cartridge valve, prefill valve and manifold block are three kinds of important foundamental elements in hydraulic system of ceramic tile press. Cartridge valve spool motion characteristics in motion process, the prefill valve through-flow ability and energy loss of manifold block directly affect the energy consumption, speed and stability of ceramic tile press. Based on the national industrial structure upgrading, to enhance the core competitiveness, enterprises need to product the tile press more energy-saving, high efficient, and more stable to control, so it is of great significance to research cartridge valve, prefill valve, and manifold block of ceramic tile press.In this paper, taking HENGLITAI Machinery Co. YP3500 ceramic tile press’s hydraulic system as the research object, analysed the flow field of two way cartridge valve, prefill valve and manifold block, giving enterprises provide a reference with practical value in structure design.1) The cartridge valve’s steady flow force mathematical model was built, and the method of multiphase flow on prefill valve was analysed. The flow acreage, steady flow force and flow ability of the cartridge valve, and the density of prefill valve and flux of prefill valve mixing phase were calculated theoretically. And influence factors of cartridge valve’s steady flow force and multiphase flow were analyzed, providing a theoretical basis for the validation of the simulation model.2) The three-dimensional geometric models of flow channels of cartridge valve, prefill valve and manifold block were built, and meshing them by using Gambit, then importing them to Fluent to set parameters and solve simulation. Simulation study came to following conclusions:(1) With the opening of cartridge valve increasing, under the same differential pressure, the pressure and velocity vector field in the flow area of the spool and sleeve becomes more complex, and flow rate separation becomes more serious and the flow becomes more uneven; whirlpool in technological cavity becomes larger. Simulation got the results of steady flow force and flux values of the cartridge valve under different opening and differential pressure.(2) Under the same differential pressure, the greater the the volume ratio, the bigger the flow of hydraulic oil through the prefill valve, and the faster the descending speed of moving beam, but the worse the press stability. Changes in differential pressure and volume ratio have little influence on the pressure field, velocity field and gaseous phase distribution trends of prefill valve; The fluid from the entrance of prefill valve emerges whirlpool in the middle position of the valve, the energy loss is relatively large, therefore the subsquent structure optimization needs to eliminate whirlpool area.(3) The flow field distribution of manifold channel corner was analysed, and it can draw the conclusion that with the increasing of differential pressure, the backflow of the fluid of corner is more intense, and flow rate separation between mainstream and the inner wall becomes more serious, and whirlpool is more obvious, and energy loss is larger.3) After structure optimized, the flow fields of prefill valve and manifold were analysed.(1) After prefill valve structure optimization, whirlpool area in the middle position of the prefill valve is eliminated and the energy loss is reduced obviously. Impact to the press moving speed and stability was analysed comparatively in the situation of the upper chamber filled of gas and not joining the gas.(2) Increasing the opening of cartridge valve on manifold block, and reducing the distance between the inlet of cartridge valve and channel intersection of manifold block, will help to reduce the pressure loss of manifold blocks so as to reduce the energy consumption effectively.