Tidal current energy water turbine based on double runners

Abstract

The invention relates to a tidal current energy water turbine based on double runners. The tidal current energy water turbine comprises a fairing, a rotation shaft, a hub and a blade fixed to the hub.The tidal current energy water turbine is characterized by further comprising an energy increasing runner located at the outlet position of the fairing, the energy increasing runner comprises a lituus spiral blade, wherein the lituus spiral blade is gradually stretched in the axial direction of the rotation shaft according to the lituus spiral line, is in a space crossed twisting shape, and is evenly distributed on the circumferential inner wall of the rotation shaft, X represents the space x-coordinate value of a key point on the section wing curve of the lituus spiral blade, and Y represents the space y-coordinate value of the key point on the section wing curve of the lituus spiral blade. The tidal current energy water turbine is simple in structure and high in efficiency, can be usedas an ocean tidal current energy power generation water turbine and can also be used for power generation in mountainous areas, plains, mountain springs, small reservoir stream and other tiny tidal current energy conditions.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and hydropower engineering equipment, in particular to a tidal current energy water turbine based on double runners. 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 a high water head to create initial ...

AI Technical Summary

Problems solved by technology

However, this solution still has the following deficiencies: first, the structure of the shroud is simple, and it cannot play a good role in gathering energy, which directly affects economic performance; second, it belongs to a single-stage ocean current energy turbine, and 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 The design theory of the airfoil is too simple to make good use of the water energy flowing through the runner.

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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