Wind driven generator hydraulic pitch-variable mechanism and system

A wind turbine and hydraulic technology, applied in wind turbines, control of wind turbines, wind power generation, etc., can solve the problems of poor dynamic response, wear of bearing tooth surfaces, low reliability, etc., achieve simple force and reduce stress power, reliable operation

Inactive Publication Date: 2018-01-16
CRRC WIND POWER(SHANDONG) CO LTD
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Problems solved by technology

Among them, the motor control structure is simple and widely used, but with the increase of the single unit capacity of the wind turbine, the motor inertia is relatively large, so its dynamic response will become poor, and the motor itself adjusts the blades continuously and frequently, which is likely to cause wear on the tooth surface of the bearing; The hydraulic drive scheme has the advantages of fast response frequency, large torque, and the same oil source as the braking system, but the structure of the existing hydraulic pitch mechanism is relatively complicated, and most of them are driven by a single hydraulic cylinder, so the reliability is low

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  • Wind driven generator hydraulic pitch-variable mechanism and system

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0026] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a wind driven generator hydraulic pitch-variable mechanism and system. The mechanism comprises a hub, a hydraulic cylinder, a web, a connecting shaft and a pitch-variable bearing, the web is connected with the inner ring of the pitch-variable bearing, the outer ring of the pitch-variable bearing is connected with the hub, the tail of the hydraulic cylinder is connected withthe hub through a hinge pin, the end of the hydraulic cylinder is connected with the web, so that the hydraulic cylinder, the web and the hub form a crank and connection rod mechanism, and linear reciprocating motion of the hydraulic rod and circumferential rotary motion around the hinge pin are transformed into circumferential rotary motion of the web. The wind driven generator hydraulic pitch-variable mechanism and system have the advantages of being simple and reliable in structure, high in response frequency and large in torque.

Description

technical field [0001] The invention relates to a hydraulic pitch variable mechanism and system of a wind power generator. Background technique [0002] As a clean and green energy, wind energy is widely used. The variable pitch wind turbine has become the mainstream type of wind turbine due to its advantages of maximum capture of wind energy and stable output power. [0003] At present, the pitch mechanism of wind turbines mainly adopts two driving schemes: electric drive scheme and hydraulic drive scheme. Among them, the motor control structure is simple and widely used, but with the increase of the single unit capacity of the wind turbine, the motor inertia is relatively large, so its dynamic response will become poor, and the motor itself adjusts the blades continuously and frequently, which is likely to cause wear on the tooth surface of the bearing; The hydraulic drive scheme has the advantages of fast response frequency, large torque, and the same oil source as the ...

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Application Information

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IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 董营张立柱郑吉荣于洪明
Owner CRRC WIND POWER(SHANDONG) CO LTD
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