Rotor structure of multistage centrifugal pump

The utility model discloses a rotor structure of a multi-stage centrifugal pump, belongs to the technology of multi-stage centrifugal pumps, and aims to solve the problem that the existing rotor structure of the multi-stage centrifugal pump is inconvenient to assemble, disassemble and maintain or easy to generate bending moment to cause bending and even breakage of a shaft. In addition, each impeller is independently and axially positioned on the shaft, machining error accumulation can be avoided, and the situation that the rotor of the multi-stage centrifugal pump generates large bending moment and the shaft is bent or even broken is avoided. 本实用新型公开了一种多级离心泵转子结构，属于多级离心泵技术，现有多级离心泵转子结构或装拆、维护保养不便，或者易产生弯矩造成轴弯曲甚至断裂，本实用新型通过将每个叶轮均与轴间隙配合并由轴经叶轮键带着转动，便于装拆维护保养，而且每个叶轮独立地轴向定位在轴上，可以避免加工误差累积，避免多级离心泵转子产生较大弯矩及造成轴弯曲甚至断裂。