Different arrangements of crankshaft crank of five-cylinder fracturing pump will cause flow and pressure fluctuation in sinks of low-pressure suction pipe and high-pressure discharge pipe connected to hydraulic end, and may even cause local disconnection. Flow and pressure fluctuations can be expressed as crankshaft load and inertia head loss, reducing crankshaft life and energy conversion efficiency;partial flow cut off will cause the phenomenon of sediment precipitation in suction pipes. In order to reduce fluctuation of flow and pressure, improve the partial flow cut off and the stress of crankshaft, the optimization target of continuous region of flow cut off phenomenon and the bending moment of crankshaft is proposed. The optimization method of crankshaft arrangement of five-cylinder fracturing pump is established. Finally, the optimal scheme for the two crankshaft cranking arrangements is determined. Its suction pipe and discharge pipe have the smallest flow fluctuation amplitude and the shortest continuing region of flow cut-off phenomenon, which effectively reduces the inertia head loss and sedimentation problem, and improves the pump suction and discharge performance and crankshaft bending moment.
Chinese Hydraulics & Pneumatics
five-cylinder fracturing pump
crankshaft crank arrangement
continuous region of flow cut off phenomenon
sedimentation, inertial loss