High-lift large-flow self-balancing multi-stage centrifugal pump suitable for complex water quality environment

The invention provides a high-lift large-flow self-balancing multi-stage centrifugal pump suitable for a complex water quality environment, and relates to the technical field of multi-stage centrifugal pumps, the high-lift large-flow self-balancing multi-stage centrifugal pump suitable for the complex water quality environment comprises a front bearing assembly, a rear bearing assembly, a pump shaft, a water inlet section, a front middle section, a water outlet section and a reverse water inlet section, a plurality of forward guide vanes are sequentially installed on the left side of the water outlet section, an L-shaped forward opening ring is installed in an inner hole of the forward guide vane closest to the water outlet section, a forward impeller is arranged in each forward guide vane, the forward impellers are installed on a pump shaft, and a plurality of reverse guide vanes are sequentially installed on the right side of the water outlet section. High-speed and high-pressure fluid media at the outlets