Impeller structure capable of measuring mixed-flow pump blade rim excitation force under Alford effect

The invention provides an impeller structure capable of measuring mixed-flow pump blade rim excitation force under the Alford effect. The impeller structure comprises an impeller, an impeller chamber, a guide vane, a guide vane chamber, a pump shaft, strain gages and an Alford force measuring system. The impeller comprises a hub, a water guide cone and three to five blades. The blades are evenly distributed in the axial direction of the hub. The strain gages are arranged on rims of the blades. Connected through holes are formed in the blades and the hub. The connecting lines of the strain gages penetrate the through holes to be connected with the Alford force measuring system arranged in the hub. A signal collection device is arranged on the impeller chamber and electrically connected with a computer. According to the impeller structure, under the conditions of not changing a mixed-flow pump runner structure and not influencing the real flowing state, the mixed-flow pump blade rim excitation force under the A