A Multi-stage Tidal Energy Turbine Based on Real-time Adjustable Spindle Angle

Abstract

Provided is a multi-stage tidal current energy water turbine based on a real-time adjustable guide cover rotation angle, the water turbine comprising a guide cover (1), a hub (3), which is fixedly arranged on a rotary shaft (2), and a basic impeller, which is fixedly arranged on the hub (3), and further comprising a supporting shaft (7) capable of adjusting the rotation angle of the guide cover in real time, and an energized rotary wheel with variable-radius hyperbolic spiral blades (9), wherein the hyperbolic spiral blades (9) gradually extend in an axial direction of the rotary shaft (2) according to the spiral line of a hyperbolic spiral line, are spatially intersected and twisted, and are uniformly distributed on an inner circumferential wall of the rotary shaft (2). The water turbine has a simple structure and is efficient, and not only can same be used for power generation using ocean tidal current energy, but same can also be used for power generation under conditions of a minute amount of tidal current energy from streams in a mountainous area, a mountain spring, a small reservoir, etc.

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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