Abstract：According to the gravity principles and the movement of crank and linking reciprocating mud pump,a gravity settling vessel is designed to prevent the solid particles into reciprocating pairs,to eliminate the damage of plunger and fitter caused by wear,and to improve the reliability.The numerical simulation of the inner flow field is done,and the trajectory and velocity field of solid particles are obtained,The results show the good performance of the vessel although the mud particles are very small.
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