Design And Analysis Of Power Port For Constant Flow Reciprocating Pump With Disc Groove Cam

In view of the large fluctuation of output flow of conventional reciprocating pumps,this paper designs a disc groove cam,which can achieve constant flow output without the help of external equipment and there is no acceleration mutation during piston movement.In this paper,the constant flow to the power end of compound pump is selected as the research object.By obtaining the curve of piston assembly speed,the instantaneous flow curve of the pump is calculated,and then the shape of the curve is adjusted so that the output flow of the three-cylinder reciprocating pump is superimposed as a constant value.Based on the motion velocity curve of the piston assembly,the profile equation of the disc groove cam is derived,and the shape curve of the disc groove cam is obtained.The design and calculation of the gear pair and piston assembly with constant flow to the power end of the disc groove cam are carried out and the simulation results verify the rationality of the design.Using SOLIDWORKS software to build a three-dimensional model of the reciprocating pump,ADAMS software is used to simulate the speed and acceleration curve of the piston assembly,and the force of the contact point between the disc groove cam and the piston assembly when the load is applied.In the simulation results,the speed and acceleration curve of the piston assembly are basically the same as the theoretical curve;In the stress simulation,the piston assembly and the third contact point of the disc groove cam are the most stressed.The modal analysis of the disc groove cam in the power end is carried out to obtain the natural frequency of each order in order to avoid the resonance frequency when the pump is working.