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Bendable blades of a hydrodynamic self-pitching turbine

A curved blade, hydrodynamic technology, applied in the directions of hydropower, engine components, machines/engines, etc., can solve the problems of cable winding, high failure rate and complex structure of the generator set, and achieve low cost, high mechanical strength and long life. Effect

Active Publication Date: 2018-08-10
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Bendable blades of a hydrodynamic self-pitching turbine
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  • Bendable blades of a hydrodynamic self-pitching turbine

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Embodiment Construction

[0016] figure 1 is the position state of the bendable blade on the central axis. The blade installation shaft 1 is located at the front end of the bendable blade. The blade installation shaft 1 can be fixed to the hub of the tidal energy turbine blade. The blade is divided into two parts, the front part 2 and the tail part 4. The blade can swing left and right around the blade installation rotating shaft 1. The front part 2 of the blade and the tail part 4 of the blade are linked together by the large rotating shaft 3 in the middle of the blade. The angle between 2 and blade tail 4 will not be less than 150 degrees. When reaching 150 degrees, due to the limit, the blade front portion 2 and the blade tail portion 4 will touch together, so the rotation will stop. On the left and right sides of the lower end of the blade tail part 4, there are left limit post 5 and right limit post 6 fixed with the turbine to limit the swing angle of the blade. When the flow comes from the lef...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B13/26F03B3/14
CPCF03B3/14F03B13/26Y02E10/20Y02E10/30
Inventor 徐明奇姚楠
Owner NORTHEAST NORMAL UNIVERSITY
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