Bionic water pump shell, partition tongue of shell and design method of partition tongue

The invention relates to the technical field of water pump shells, in particular to a bionic water pump shell partition tongue which comprises a partition tongue head part and two partition tongue side parts which are integrally arranged, and the two partition tongue side parts are symmetrically arranged on the two sides of the partition tongue head part; the edge shape of the projection of the head part of the baffle tongue on the water diversion surface of the baffle tongue is a first appearance curve; the edge shape of the projection of the baffle tongue side part on the water diversion surface of the baffle tongue is a second appearance curve; the curvilinear equation of the second appearance curve takes one point, far away from the first appearance curve, of the second appearance curve as a coordinate origin, takes the direction along the center line of the partition tongue as an X axis, and takes the orientation of the head part of the partition tongue as a Y axis. The invention further relates to a des