Control device for critical rotation speed of fan
A critical speed and control device technology, applied in the control of wind turbines, speed control, engine control, etc., can solve problems such as speeding, damage to power generation devices, and damage to wind turbine blade power generation devices
Pending Publication Date: 2018-03-27
DALIAN UNIV OF TECH
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Problems solved by technology
When a typhoon passes by, the fan blades will run at high speed. In this case, the speed of the power generation device will increase sharply or even exceed its critical speed, resulting in a serious "speeding" accident, which will cause huge damage to the fan blades and power generation device, or even directly destroy them. power generation device
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Embodiment Construction
[0018] The present invention will be further described below in conjunction with accompanying drawing.
[0019] figure 1 , 2 , 3, and 4 show a structural diagram of a critical speed control device for a fan. The control device for the critical speed of the fan includes a fan blade 1 , a deceleration plate 3 , a retractable mechanism 5 and a buffer device 6 . The speed brake 3 is hinged to the fan blade 1 through the first hinge 2 . One end of the retractable mechanism 5 is fixedly connected to the first connecting piece 4, and the other end is fixedly connected to the second connecting piece 4a. The first connecting piece 4 is connected to the fan blade 1 through the third hinge 2b, and the second connecting piece 4a is connected through the second connecting piece 4a. The hinge 2 a is connected to the speed brake 3 , and a buffer device 6 is provided at the tip 1 a of the fan blade 1 , and the buffer device 6 is matched with the blade tip 3 a of the speed brake 3 . When t...
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The invention discloses a control device for the critical rotation speed of a fan, and belongs to the technical field of wind power equipment. The control device mainly comprises speed reducing plates, folding and unfolding mechanisms and buffering devices. The speed reducing plats are connected with fan blades through hinges, the folding and unfolding mechanisms are connected with the fan bladesthrough connecting parts, and the buffering devices are arranged on the tips of the blades. When the rotating speed of the fan blades exceeds the critical rotation speed of the fan, the face area of the blades is increased, the borne air resistance is also increased, and the rotating speed of the fan blades is reduced under the action of the air resistance. According to the control device, the rotating speed of the fan blades can be controlled without complex mechanical mechanisms, and the cost and failure rate of the fan are greatly reduced; and meanwhile the risk that power generation equipment is damaged due to the fact that the rotating speed of the fan is too high is reduced to a large degree, and in addition, the control device can be widely applied to various horizontal axial fans and vertical axial fans.
Description
technical field [0001] The invention relates to a control device for the critical speed of a fan, belonging to the technical field of wind power equipment. Background technique [0002] With the increasing shortage of fossil energy, countries all over the world are turning their attention to renewable energy. As a clean and renewable green energy, wind energy has attracted widespread attention. Wind power generation is currently the most important means of utilizing wind energy. It mainly generates electricity by driving the blades of the wind turbine to rotate to drive the power generation equipment to rotate, mainly including horizontal axis fans and vertical axis fans. At present, wind power plants are mainly divided into land power plants and offshore power plants. Compared with land, the sea has fewer shelters and a wider space, so wind energy resources are more concentrated and stable. At the same time, the offshore wind farm has less impact on the surrounding natura...
Claims
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IPC IPC(8): F03D1/06F03D3/06F03D7/02F03D7/06
CPCF03D1/0675F03D3/062F03D7/0252F03D7/0276F03D7/06F05B2270/606F05B2270/604F05B2270/1011Y02E10/74Y02E10/72
Inventor 姜宜辰李嘉文赵培栋宗智孙铁志王昆
Owner DALIAN UNIV OF TECH