Multi-level tidal current energy water turbine based on real-time adjustable fairing rotation angle

Abstract

The invention relates to a multi-level tidal current energy water turbine based on the real-time adjustable fairing rotation angle. The multi-level tidal current energy water turbine comprises a fairing, a hub fixedly arranged on a rotation shaft and a basic impeller fixedly arranged on the hub. The multi-level tidal current energy water turbine is characterized by comprising a supporting shaft with the real-time adjustable fairing rotation angle and an energy increasing rotation wheel with changeable radius hyperbolic spiral helix blades, the hyperbolic spiral helix blades are gradually stretched in the axial direction of the rotation shaft according to the spiral line of the hyperbolic spiral, are in a space intersection twisting shape and are evenly distributed on the circumferential inner wall of the rotation shaft, the hyperbolic spiral helix blades are arranged on the periphery of the rotation shaft, X represents the space horizontal axis value of the key point on the hyperbolic spiral helix blade section wing curve, and Y represents the space vertical coordinate value of the key point on the hyperbolic spiral helix blade section wing type curve. The multi-level tidal current energy water turbine is simple in structure and high in efficiency, can be used for ocean tidal current energy power generation and can also be used for power generation under micro tidal current energy conditions such as the mountainous area, the mountain spring and the small reservoir stream.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and hydropower engineering equipment, in particular to a multi-stage tidal current energy water turbine based on a real-time adjustable deflector angle. Background technique [0002] Countries in the world today put the development of hydropower in the priority position of energy development. The total amount of hydropower resources in my country is very rich. There are not only medium and high water head resources, but also low water head resources (including tidal current energy) of about 0.8 to 100 million kilowatts. The development and utilization of new energy, especially the development and utilization of marine energy for power generation, has great potential. development potential. Ocean current energy generates electricity by relying on the impact of the ocean tide to rotate the water turbine at high speed, and then drive the generator to generate electricity. It does not require ...

AI Technical Summary

Problems solved by technology

However, this solution still has the following deficiencies: first, the structure of the dome is simple, and the angle of attack of the dome cannot be adjusted in real time according to the inflow angle, so it cannot play a good role in energy gathering and directly affects economic performance; Class ocean current energy turbines, the efficiency of using ocean current energy to generate electricity is low

Although this scheme can efficiently convert ocean kinetic energy under the bidirectional flow of ocean currents, it still has the following shortcomings: first, it belongs to a single-stage ocean current energy turbine, and the efficiency of using ocean current energy to generate electricity is low; second, the design of turbine blades is still traditional Design, the airfoil is too simple, can not make good use of the water energy flowing through the runner; third, the design of the angle of attack of the dome is limited, and the dome cannot be adjusted in real time

Although the use of the shroud improves the energy gathering effect of the tidal current energy, there are still the following deficiencies: First, the vertical axis blade adopts a single elliptical blade design, which cannot provide efficient output power; second, it belongs to a single-stage ocean current energy turbine. The efficiency of ocean current power generation is low

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