Abstract:In order to verify the dredging ability of the pipeline robot, the fluid-solid coupling study of the dredging device under rotating conditions was carried out. Simplify the dredging device of the pipeline robot, and import the simplified three-dimensional model into ANSYS Workbench, and add the fluid domain to obtain the coupled model, then mesh the mesh module to obtain the high-precision finite element model. Finally, based on the finite element method, the solid speeds of 1.6r.s-1 and 0.3r.s-1 are set under countercurrent conditions respectively. The solid speed is set to 1.6r.s-1 under the downstream conditions, and the flow rate and forward speed of the set fluid were both 2.5 m/s, and the fluid-solid unidirectional coupling calculation was performed. A schematic diagram of the motion state of the fluid based on velocity and pressure is obtained and comparative analysis is performed. The results show that the dredging device has obvious dredging effect in the condition of countercurrent high speed, and has the ability of scraping-stirring-filtering-propulsion-self-flowing five-in-one dredging operation, and provides theoretical basis for the control of pipeline robots.