Bendable blades of a hydrodynamic self-pitching turbine

Abstract

The invention belongs to the technical field of development of ocean energy of renewable energy sources, and particularly relates to a blade of a hydrodynamic automatic variable-pitch turbine which can efficiently convert tidal current energy in oceans into mechanical energy. Efficient utilization of bidirectional tides can be achieved, the blade is automatically bent under the hydrodynamic action of tides, and thus pitch variation is achieved. The bendable blade is provided with rotating shafts, the installation rotating shaft is arranged at the front end of the blade and used for installing the blade on the turbine, and the blade can swing left and right around the installation rotating shaft; the big rotating shaft is mounted in the middle of the blade, and the front portion and the tail portion of the blade can rotate around the big rotating shaft by a small angle; and the blade is suitable for areas with bidirectional returning tides, efficient pitch variation of the turbine is achieved, conversion is efficient, the cost is low, and motive seal and extra energy drive are not needed. The bendable blade of the hydrodynamic automatic variable-pitch turbine is simple in structure, high in mechanical strength, reliable in performance, low in weight, long in service life, resistant to seawater corrosion and free of maintenance.

Description

technical field [0001] The invention belongs to the technical field of ocean energy development in renewable energy, and specifically relates to the utilization of tidal current energy in the ocean [0002] Blades of hydrodynamic self-pitching turbines for efficient conversion of mechanical energy. Background technique [0003] The so-called ocean current mainly refers to the relatively stable flow in submarine channels and straits. The so-called tidal current mainly refers to the regular seawater flow caused by tides. The ocean current and tidal current are mixed together, and tidal current energy accounts for the main part. , Tidal current power generation is a technology that uses the kinetic energy of ocean currents to generate electricity. Generally, there is no need to build a dam, and the water turbine unit generates electricity. The energy of the tidal current is proportional to the square of the flow velocity and the flow rate. [0004] The main way to use tidal ...

AI Technical Summary

Problems solved by technology

The current technology, one adopts the direction adjustment technology, that is, the overall steering of the turbine and the generator to adapt to the two-way flow, but the direction adjustment will cause the problem of entanglement of the generator set cable; the other is the use of pitch technology, that is, the turbine and the The generator does not move, and only the blades on the turbine rotate 180 degrees to adapt to the incoming flow. The pitch technology of the current ocean energy tidal current power generation equipment is a pitch technology driven by electric or hydraulic pressure. The structure is complex and requires dynamic seals. High cost and high failure rate

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