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A controllable variable angle of attack system for blades of h-shaped vertical axis wind turbines for medium and low speeds

A wind turbine, vertical axis technology, applied in the control of wind turbines, wind turbines, motors, etc., can solve the problem of difficulty in completing the angle of attack of blades, and achieve the effect of good system controllability

Inactive Publication Date: 2016-09-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the rated speed of the 3kW vertical axis wind rotor is 110r / min, the time required to change the angle of attack at 10 degrees is about 0.016s. Continuous rotation, in such a short period of time, it is difficult to complete the change of blade angle of attack

Method used

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  • A controllable variable angle of attack system for blades of h-shaped vertical axis wind turbines for medium and low speeds
  • A controllable variable angle of attack system for blades of h-shaped vertical axis wind turbines for medium and low speeds
  • A controllable variable angle of attack system for blades of h-shaped vertical axis wind turbines for medium and low speeds

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Embodiment

[0030] Such as figure 1 As shown, the medium and low speed H-type vertical axis wind power fan blade controllable variable angle of attack device in the embodiment of the invention includes a wind pressure sensor 1-1, a support rod 1-2, a wind wheel main shaft 1-3, and a blade 1- 4. Collector ring 1-5, electric push rod 1-6, frequency conversion motor 1-7, blade mounting hoop 1-8, controller 1-9, relay 1-10, wherein, support rod 1-2 is provided with five one, evenly distributed on the circumferential position of the main shaft 1-3 of the wind wheel, each support rod 1-2 is connected with a blade 1-4, and a blade mounting hoop 1-4 is used between the blade 1-4 and the support rod 1-2. 8 Install the connection. A / D converters are arranged in the controllers 1-9.

[0031] exist figure 1 A wind pressure sensor 1-1 is installed on each support rod 1-2 in the structure, so that it detects the position of the wind wheel by sensing the wind pressure; each blade mounting hoop 1-8 an...

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Abstract

The invention relates to an H-type vertical-axis wind turbine blade attack angle change controlling system used under medium-speed and low-speed conditions. The system comprises wind pressure sensors, supporting rods, a wind wheel spindle, blades, a collecting ring, electric pushing rods, a variable-frequency motor, blade installation hoops, a controller and a relay, wherein the five supporting rods are evenly distributed on the circumference of the wind wheel spindle, one blade is connected to each supporting rod and is connected with the supporting rod through the corresponding blade installation hoop, one wind pressure sensor is installed on each supporting rod to detect the position of a wind wheel by sensing wind pressure, one electric pushing rod is installed between each blade installation hoop and the supporting rod corresponding to the blade which is located behind the blade installation hoop and adjacent to the blade installation hoop so that the electric pushing rod can push the blade installation hoop to rotate around the fulcrum of the supporting rod by a certain angle according to a blade position signal detected by the corresponding wind pressure sensor, and then the attack angle of each blade can be adjusted. The system is simple in structure, light, convenient to install and maintain, and high in stability.

Description

technical field [0001] The invention relates to a controllable and variable attack angle system for blades of an H-type vertical axis wind power generator for medium and low speeds, belonging to the technical field of wind power generation. Background technique [0002] Energy, as a basic need for social survival and economic development, has received more and more attention from the state. As a pollution-free renewable green energy, wind energy has broad application prospects. The utilization of wind energy is mainly horizontal axis and vertical axis wind power generation system. The current vertical-axis wind turbine has the advantages of being able to receive wind from any direction, no need to face the wind, no speed-increasing gearbox and generator can be installed on the ground, and easy maintenance, etc., which are gradually being valued and used more and more widely. However, at present, most wind rotors have a fixed blade angle of attack at normal wind speeds. Onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/06
CPCY02E10/74
Inventor 张立军赵昕辉孙明刚张明明
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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