BW-250 type slurry pump bionic piston

The invention belongs to the technical field of drilling equipment for petroleum drilling, and relates to a BW-250 type slurry pump bionic piston. In the BW-250 type slurry pump bionic piston, framework bottom glue is fixedly connected to the bottom of a rubber seal cup, alternately-distributed bionic concave pits and bionic stripes are arranged on the surface of the rubber seal cup from top to bottom, the section of each bionic concave pit is rectangular, and the distribution, depth and diameter of the bionic concave pits are changeable. The section of each bionic stripe is triangular or semicircular, and the depth and width of the bionic stripes are changeable. The distance between the bionic concave pits and the bionic stripes is changeable, and the distance between the concave pits andthe stripes in adjacent lines are changeable. By means of the bionic morphological structure, stress concentration can be dispersed, part of abrasive particles and abrasive dust can be stored, and piston wear can be reduced;