A hydro turbine based on composite multi-stage tidal current energy generation

Abstract

Provided is a water turbine based on compound multi-stage tidal current energy power generation, comprising a guide cover (1), a bearing support frame (3), and a rotary wheel composed of a rotating shaft (2) and an impeller, wherein the impeller comprises multiple pear-shaped linear airfoil blades (4); the rotary wheel is fixedly arranged at the two-thirds position of a middle section of the guide cover (1); the guide cover (1) has two trumpet-shaped ends with a narrow inlet and a wide outlet, the middle section thereof is of a linear shape, and the top and the bottom of the guide cover (1) are both of a horizontal plane; and the pear-shaped linear airfoil blades (4) are provided on a blade fixing plate, with the rotating shaft (2) acting as the centre, and the pear-shaped linear airfoil blades (4) are spatially circumferentially distributed and are welded and fixed to the bearing support frame (3). The water turbine has a simple structure and is efficient, and not only can same be used as a water turbine 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, plains, 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 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

Images