Hydraulically-driven fan blade angle self-adjusting device

The utility model provides a hydraulically-driven fan blade self-angle-adjusting device, which relates to the technical field of fan blade self-angle-adjusting equipment and comprises a hydraulic lifting component, a plurality of groups of blade angle-adjusting components, a plurality of groups of blade clamping components, blades, a hub and a transmission shaft. The multiple sets of blade angle adjusting assemblies are hinged to the hydraulic lifting assembly and evenly distributed on the inner side of the edge of the hub, the multiple sets of blade clamping assemblies are located on the outer side of the hydraulic lifting assembly, and the blade clamping assemblies and the hydraulic lifting assembly are connected through a rotary support. By means of the hydraulically-driven fan blade angle self-adjusting device, the problem that in the prior art, due to the fact that the installation angle of a fan blade is fixed, operation cannot be changed according to working conditions, and energy is wasted is solved.