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Individual pitch control device for vane

An independent pitch and blade technology, applied in the field of wind turbines, can solve the problems of high cost, increased pitch frequency, and high cost of alternating loads, and achieve load balance and increase wind-capturing capabilities

Pending Publication Date: 2019-09-13
中国大唐集团新能源科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The independent pitch control method can effectively reduce the alternating load, but the corresponding cost is also high, because it increases the pitch frequency, and greatly increases the requirements of the sensor and actuator, and the cost of suppressing the alternating load is high

Method used

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  • Individual pitch control device for vane
  • Individual pitch control device for vane
  • Individual pitch control device for vane

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention. and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

[0022] The terms "installation", "connection" and...

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PUM

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Abstract

The invention discloses an individual pitch control device for a vane. The individual pitch control device comprises a vane root, an air cylinder barrel, a pressure regulating piston, a driving mechanism and a pitch control mechanism, wherein the vane root is cylindrical and an opening in the end part of the vane root is sealed in a piston form; the air cylinder barrel is fixed to a wheel hub of awind turbine, two ends of the air cylinder barrel are opened, and the vane root and the air cylinder barrel are in hermetical sliding fit; the pressure regulating piston is arranged at the other endof an inner cavity wall of the air cylinder barrel; the driving mechanism is used for driving the pressure regulating piston to adjust the pressure in the air cylinder barrel; and the pitch control mechanism comprises a spiral driving part connecting the vane root and the air cylinder barrel, and when the vane root shrinks in an inner cavity of the air cylinder barrel, the spiral driving part automatically drives the vane to reverse relative to the air cylinder barrel. The individual pitch control device can inhibit an alternating load reliably with a low cost.

Description

technical field [0001] The invention relates to a wind turbine, in particular to a blade independent pitch changing device. Background technique [0002] As a renewable green energy source, wind turbines only need to utilize the kinetic energy of the wind. The cost of wind energy utilization is mainly composed of three aspects: manufacturing, installation and commissioning, and operation and maintenance. Among them, lean manufacturing of equipment is the foundation. Considering the cost of wind turbines, there are two technical paths to improve economy. One is to reduce the cost of main components through fine design, and the other is to extend the operating life of key components. For technical transformation of in-service blades which accounts for 20% of the cost of the whole machine, the latter is a more feasible way. [0003] The design life of a wind turbine is more than 20 years. Taking a 2MW unit as an example, its blades will rotate about 10 8 On a weekly basis, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D1/06
CPCF03D7/0224F03D1/0675F05B2270/605Y02E10/72
Inventor 陈洪胜刘燕孙涛党群陈继录吴智泉
Owner 中国大唐集团新能源科学技术研究院有限公司
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