Turbine energy capturing hydraulic variable pitch mechanism

The invention discloses a turbine energy capturing hydraulic variable pitch mechanism which comprises a transmission shaft, a radial supporting bearing I, a cylinder barrel, a hollow rack piston rod, a radial supporting bearing II and turbine blades. The hollow rack piston rod is of a hollow rod-shaped structure, coaxially arranged on the transmission shaft in a sleeving mode and supported in the cylinder barrel through a radial supporting bearing I and a radial supporting bearing II. The turbine blades are installed at the input end of the transmission shaft and form gear pair transmission fit with U-shaped grooves formed in the hollow rack piston rod corresponding to the input end of the transmission shaft. Two oil cavities are formed between the hollow rack piston rod and the cylinder barrel, the two oil cavities are both connected with a hydraulic system, and pressure oil is input into the different oil cavities to drive the hollow rack piston rod to do linear motion leftwards or rightwards, so that turbi