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Device for driving pitch of wind turbine blade, rotating wind turbine blade with same, and wind turbine device

一种驱动装置、风车旋转的技术，应用在风力发电机组件、风能发电、风力发动机等方向，能够解决间距驱动装置耐久性下降、连结轴易破损等问题

Inactive Publication Date: 2012-10-31
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the expansion and contraction force of the rod exerts a large bending moment on the root of the connecting shaft, and the connecting shaft is easily damaged, which may reduce the durability of the pitch drive device.

Method used

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  • Device for driving pitch of wind turbine blade, rotating wind turbine blade with same, and wind turbine device
  • Device for driving pitch of wind turbine blade, rotating wind turbine blade with same, and wind turbine device
  • Device for driving pitch of wind turbine blade, rotating wind turbine blade with same, and wind turbine device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0044] figure 1 It is a side view showing an example of a wind power generator to which the pitch drive device for wind turbine blades according to the first embodiment can be applied. This wind power generation device 1 includes, for example: a tower 3 erected on the upper surface of a reinforced concrete foundation 2 buried in the ground; a wind deflector 4 disposed on the upper end of the tower 3; and a windmill disposed on the wind deflector 4. Rotating blade 5 ; a generator 6 and a speed increaser 7 that are installed inside the spinner 4 and generate power through the rotation of the wind turbine rotating blade 5 .

[0045] The wind turbine rotor blade 5 includes: a rotor hub 10 pivotally supported by a spinner 4 so as to be rotatable about a substantially horizontal horizontal rotation axis; The windmill blade 11 ; the head airtight compartment 12 covering the rotor hub 10 ; the pitch driving device 15 arranged inside the rotor hub 10 . The pitch driving device 15 is...

no. 2 approach

[0071] Figure 12 It is a plan view showing the vicinity of the cylinder 35 of the pitch driving device 55 of the second embodiment. Here, except for the pressure accumulator 56 and its arrangement position, it is related to Figure 8 Since the first embodiment shown is the same, the same reference numerals are assigned to the respective parts, and descriptions thereof are omitted.

[0072] The accumulator 56 is formed in a straight pipe shape similarly to the accumulator 48 of the first embodiment, and the accumulator 56 is arranged near the cylinder 35 in parallel to the axis of the cylinder 35 . The accumulator 56 and the cylinder 35 are connected and integrated by a pair of connection parts 57 .

[0073] Furthermore, the pressure accumulator 56 is disposed so as to pass through the front end surface 22 of the rotor hub 10 through the cylinder through hole 26 together with the cylinder 35 . Therefore, the accumulator 56 rotates around the support shaft 31 together with t...

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Abstract

In order that the pitch angle of a wind turbine blade can be changed using a simple, lightweight, low cost, and highly durable structure without impairing the strength of each portion such as a rotor hub, the present pitch drive device (15) is characterized in comprising: a cylinder support section (27) provided to the rotor hub (10) and having a support point (31) located on the side of the cylinder support section (27) which is opposite the front end surface (22)(non-supported end section) of the rotor hub (10); an eccentric connection point (34) provided at an eccentric position on the root-side end surface (11b) of the wind turbine blade (11); and a cylinder (35) disposed so as to penetrate through the non-supported end section (22) of the rotor hub (10) and configured in such a manner that a connection section (38) provided to the portion of the cylinder (35) which protrudes further outward than the non-supported end section (22) is rotatably connected to the support point (31) through a spherical surface joint (39) and in such a manner that a connection section (40) located on the inner side of the non-supported end section (22) is rotatably connected to the eccentric connection point (34) through a spherical surface joint (41).

Description

technical field [0001] The present invention relates to a pitch drive device for a wind turbine blade that changes the pitch angle of the wind turbine blade, a wind turbine rotor blade including the device, and a wind power generator. Background technique [0002] A standard propeller-type wind power generator includes a wind turbine rotor blade in which a plurality of wind turbine blades are attached to a rotor hub serving as a rotation center. The windmill rotor blades are pivotally supported on the windward side surface of the spinner supported by the upper end of the tower in a swingable and swivel manner. Drive to generate electricity. In the case of an upwind type wind power generator, the swivel drive of the spinner is controlled so that the rotation center axis of the rotor hub (wind turbine rotor blade) always points to the upwind direction to efficiently generate electricity. [0003] In recent years, Patent Document 1 and the like disclose a pitch driving device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00F03D7/04
CPCY02E10/723F05B2260/79F05B2270/604F03D7/0224Y02E10/721Y02E10/72F05B2270/328
Inventor 松田三央子沼尻智裕
Owner MITSUBISHI HEAVY IND LTD
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