Special turbine for self-variable-pitch bidirectional-flow ocean current power station

Abstract

The invention relates to a special turbine for a self-variable-pitch bidirectional-flow ocean current power station, belonging to the field of renewable energies. Symmetric airfoil (NACA0012) high-solidity blades are adopted. The root part of each blade is provided with a self-variable-pitch hydrodynamic force compensation winglet. A limiting control system is arranged at the root part of each blade to ensure that the angle of the blade can be adjusted. When the direction of ocean current is changed, the hydrodynamic force compensation winglet of the blade generates deflection torque to enable the blade to vary blade pitch and the angle is limited by a limiting controller arranged at the root of the blade. Thereby, the optimum attach angle is kept, the highest conversion efficiency is obtained, the rotating direction of the blade is unchanged when reverse current comes, the entire generating set has no direction adjustment control device and power transmission cables are prevented from being twisted. The used material can effectively resist seawater corrosion. The invention has the advantages that the structure is simple, the operation is reliable, the special turbine has the property of resisting seawater surge destruction, and the turbine can continuously and stably work in seawater for long time.

Description

technical field

[0001] The invention belongs to the field of renewable energy, and in particular relates to a special-purpose turbine for a self-variable bi-directional flow ocean current power station. Background technique

[0002] At present, the international energy crisis and continuous environmental degradation have caused countries to increase their efforts to develop new renewable energy sources. Ocean energy, especially ocean current energy, has incomparable sustainability, regularity and predictability. with commercial prospects. Internationally, the technology of horizontal-axis ocean current power generation in Britain and the United States has developed rapidly, and has entered the demonstration stage of megawatt-scale ocean current power stations, but the technology is not yet mature. In recent years, domestic ocean current power generation technology has also developed rapidly, and there is no big gap with the international one. Nowadays, most of the directio...

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