Centrifugal pump mounting and fixing structure

The utility model discloses a centrifugal pump mounting and fixing structure, which is characterized in that a first semi-circular groove and a second semi-circular groove are respectively drilled on a pump foot on the driving side of a pump body and a support, and then are connected into a connecting hole in the radial direction through a cylindrical pin, so that the driving side of the pump body can be radially fastened, and the service life of the pump body is prolonged. The axial thermal deformation of the pump body is mostly towards the non-driving side of the pump body, the axial thermal deformation of the driving side of the pump body is reduced, and meanwhile, the cylindrical pin transfers the acting force generated by the thermal expansion of the pump body to the base with better rigidity, namely, the expansion direction of the pump body is restrained by a simple structure, so that the pump body is always expanded in the axial direction; the pump body is limited to move towards the periphery, the cen