Water turbine based on combined type multi-stage tidal current energy power generation

Abstract

The invention relates to a water turbine based on combined type multi-stage tidal current energy power generation. The water turbine comprises a flow guide cover and a rotating wheel composed of a bearing supporting frame, a rotating shaft and an impeller. The impeller comprises a plurality of pyriform line wing type blades, the rotating wheel is fixedly arranged at the 2 / 3 position of the middlesection of the flow guiding cover, and the two ends of the flow guiding cover are each in a horn shape, wherein an inlet of the flow guiding cover is slim, and an outlet of the flow guiding cover is thick. The middle section is in a leaner shape, and the top and the bottom of the flow guiding cover are both the horizontal plane. The pyriform line wing type blades take the rotating shaft as the center on a blade fixing plate and circumferentially distributed in space and welded and fixed to the bearing supporting frame, and X and Y represent the spatial coordinate values of a key point on the section wing type curve of one single pyriform line wing type blade correspondingly. The water turbine is simple in structure and high in efficiency, can be used for sea tidal current energy power generation and can also be used for power generation under the micro tidal current energy conditions such as mountains, plains, mountain springs, small reservoirs and streams.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and hydropower engineering equipment, in particular to a water turbine based on compound multi-stage tidal current energy generation. 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 t...

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 bidirectional currents, it still has the following deficiencies: 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 blade design of the turbine 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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