Variable-pitch net-shaped stay wire wind wheel

Abstract

The invention discloses a variable-pitch net-shaped stay wire wind wheel, and belongs to the technical field of new energy. The variable-pitch net-shaped stay wire wind wheel comprises a wheel hub (1), a wheel rim (8), blades (3) and stay wire cables (2), wherein the wheel hub (1) and the wheel rim (8) are fixedly connected into a whole through the stay wire cables (2), and are tensioned through wire cable tensioners, and the stay wire cables (2) longitudinally penetrate through the blades (3). The variable-pitch net-shaped stay wire wind wheel is characterized in that the inner end and the outer end of each blade (3) are connected with blade variable-pitch devices, an outer supporting plate at the outer end of each blade (3) is hinged to each outer connecting line (5), each outer connecting line (5) is connected with one end of each outer rotating plate beside the outer connecting line, the other end of each outer rotating plate is connected with an outer backstay cable (4), a middle shaft of each outer rotating plate is hinged to an outer support fixed to the wheel rim (8), an inner supporting plate at the inner end of each blade (3) is hinged to an inner connecting line (7), each inner connecting line (7) is connected with one end of an inner rotating plate, and the other end of each inner rotating plate is connected with an inner backstay cable. According to the variable-pitch net-shaped stay wire wind wheel, variable-pitch stability of the blades is good, the helical face of a windward side of each blade is small in change, the wind power utilization coefficient is greatly improved, cost is greatly reduced, and the defects of a three-blade wind wheel and the defects of an existing stay wire wind wheel are overcome.

Description

technical field [0001] The invention relates to a wind turbine that converts wind energy into mechanical rotation energy, and belongs to the technical field of clean new energy. Background technique [0002] 〔0001〕On the present large and medium-sized wind power generators, the device that converts wind energy into mechanical kinetic energy is mostly a variable-pitch three-blade wind wheel. But the large and medium-sized variable-pitch three-blade wind rotor has many shortcomings, for example: 1. its wind energy utilization coefficient (the ratio of the rotational energy obtained by the wind rotor and the wind kinetic energy passing through the wind rotor) is only about 20% ( The limit value is 59.3%); ②The cost is high, and the installed capacity per kilowatt of reinforced FRP is nearly 2,000 yuan higher (the cost of variable pitch and low voltage capability accounts for about 30%); ③The life of reinforced FRP is short, and the strong Sometimes it is damaged under a typhoo...

AI Technical Summary

Problems solved by technology

[0003] 〔0001〕The present invention provides a new type of wind turbine on the basis of the above-mentioned variable-pitch cable-stayed wind wheel, which is called "variable-pitch net-shaped cable-stayed wind wheel". The problem of the above-mentioned guyed wind wheel is solved, and the above-mentioned shortcomings of the three-blade wind wheel are overcome

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