Axial flow pump free of fish impact injury

The invention discloses an axial flow pump free of fish impact damage. The axial flow pump comprises an elbow-shaped water inlet flow channel, a water inlet flow channel bent pipe section, an impeller with forward-swept blades, a water guide mechanism, a transmission shaft, a water outlet flow channel bent pipe section and a diffusion section which are sequentially communicated in a basin. The main reason for damage and death of fishes in a rotating machine is blade impact, the possibility that the fishes are impacted and damaged is reduced on the premise that the hydraulic performance of the axial flow pump is guaranteed, and therefore the survival rate of the fishes passing through the pump is increased, hydroelectric energy utilization and ecological environment protection are both considered, and the ecological benefits of water conservancy projects are increased; coordinated development of hydroelectric energy and fish resources can be achieved, and the application prospect is wide. 本发明公开一种无鱼类撞击损伤的轴流泵，其过