Horizontal-axis tidal-current-energy water turbine impeller

Abstract

The invention relates to a horizontal-axis tidal-current-energy water turbine impeller, belonging to the field of development of ocean-energy renewable sources of energy. According to the water turbine impeller, an included angle (a) between each blade connecting seat and a hub is 6-8 degrees, each blade connecting seat is of a grooved structure, the middle of the hub is of a hollow structure, blades are of hollow streamline structures, a blade connecting block is fixedly connected to the root of each blade, the blade connecting blocks are matched with the blade connecting seats adopting the grooved structures, and the blade connecting blocks are fixedly arranged in the grooved structures of the blade connecting seats through hub locating pins; a rotation control mechanism is arranged in the hollow hub and the blades and is provided with a bearing supporting structure; a controller controls servo motors to control the opening / closing of attached wings sequentially through a driving shaft, a driving shaft gear, a driven shaft gear and a driven shaft according to the revolving speed of the impeller. The water turbine impeller has the advantages that the overall performance of a horizontal-axis tidal-current-energy water turbine is improved, tidal current energy capture capability is improved, the blade form is reasonable, the efficiency is high, and the running is safe, stable and reliable.

Description

technical field [0001] The invention relates to an impeller of a horizontal axis tidal current energy water turbine, which belongs to the field of ocean energy and renewable energy development. It is used to improve the energy harvesting efficiency, self-starting performance and optimized turbine blade installation method of high-power horizontal axis tidal current energy turbines. Background technique [0002] The international energy situation is becoming increasingly tense, and the development and utilization of new energy has become an inevitable choice for people. In recent years, tidal current energy, as a clean and renewable energy source, has attracted much attention in its development and utilization. At present, tidal current energy harvesting devices are divided into two categories: horizontal axis tidal energy turbines and vertical axis tidal energy turbines. Horizontal axis tidal energy turbines are widely used for their high efficiency and stable operation. M...

AI Technical Summary

Problems solved by technology

Most of our country has semi-diurnal tide, that is, it rises and falls twice a day and the flow velocity is low. Due to the unsatisfactory self-starting ability of the turbine, the need to start the flow rate is too high, so that the turbine will not work most of the time every day, which greatly reduces the tidal current energy capture. A large amount of energy is lost; the horizontal axis tidal current energy turbine captures the tidal current energy, mainly relying on the water resistance of the blades to generate torque. The turbine blades are composed of airfoils on each section according to a certain installation angle. Basically no work is done, which has a negative impact on the energy harvesting efficiency of the horizontal axis tidal current energy turbine; the installation process of the flange plate installation method used by the current turbine is complicated, the installation angle of the blade cannot be accurately guaranteed, and corrosion often occurs

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