Research of Pressure Fluctuation Variation and its Impact on the Hydraulic End of Drilling Pump

Based on three functions:piston motion function、control function of fluid in cylinder and motion function of valve plate,the first-order mathematic control model of pressure fluctuation in drilling pump’s cylinder was erected and simulated for the variation of pressure with times,the variation of valve plate’s L distance,as well as,the force between valve plate and seat can be calculated.On this basis,its impact on the cylinder system by pressure fluctuation is analyzed deeply.