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Passively-controlled movable blade tip small wing device

A technology of passive control and moving blades, which is applied in the direction of engine control parameters, control of wind turbines, and wind turbines consistent with the wind direction, etc. It can solve problems such as unsuitable for large wind turbine control, high cost of control methods, and increased blade quality. , to achieve the effect of improving the downstream wind quality, increasing the wind energy utilization coefficient, and reducing the flow intensity around the blade tip

Active Publication Date: 2019-12-24
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although a rotatable winglet is designed in the prior art, the control method of the designed winglet is active control, and the rotation of the winglet is controlled by the steering gear. The cost of the control method is high, the system is complicated, it is not easy to maintain, and the impairs the quality of the blades, and is not suitable for large-scale wind turbine control

Method used

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  • Passively-controlled movable blade tip small wing device
  • Passively-controlled movable blade tip small wing device
  • Passively-controlled movable blade tip small wing device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] The present invention consists of winglet 1, blade 2, torsion bracket 3, torsion spring 4, axial spring 5, winglet tip 6, winglet root 7, winglet root web 8, main beam 9, winglet connecting buckle 10, Twist bracket connection buckle 11, torsion shaft 12, winglet locking device 13, axial spring shaft 14, axial spring shaft rotation groove 15, bearing 16, support plate 17, blade web 18, axial spring fixing boss 19 Composition, the specific structure includes blade 2, winglet 1, described winglet 1 is made up of winglet tip 6, winglet root 7, winglet wing root web 8, main beam 9, and described winglet 1 is installed on On the side of the suction surface of the blade 2, an auxiliary mechanism torsion support 3 is provided between the winglet 1 and the blade tip 2, and a torsion spring 4 for controlling the torsion of the winglet 1 is provided between the winglet 1 a...

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Abstract

The invention discloses a passively-controlled movable blade tip small wing device. The passively-controlled movable blade tip small wing device is composed of blades (2) and small wings (1), each small wing (1) is installed on one side of the corresponding blade (2), a torsion bracket (3) is arranged between each small wing (1) and the corresponding blade (2), and torsion springs (4) are arrangedbetween each small wing (1) and the corresponding torsion bracket (3); small wing connecting buckles (10) are installed on each small wing root (7), and small wing locking devices (13) are installedon the small wing connecting buckles (10); and a supporting plate (17) is installed between two webs of each blade (2), a bearing (18) is installed at the center of each supporting plate (17), the twoends of each axial spring (5) are connected with the corresponding supporting plate (17) and the corresponding torsion bracket (3), and each axial spring (5) is provided with an axial spring fixing boss (19) and an axial spring shaft rotating groove (15). The passively-controlled movable blade tip small wing device has the beneficial effects that the structural design is reasonable and simple, the manufacturing cost is low, maintaining is convenient, the blades can be protected against interference, the using range is wide, and energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a passively controlled movable blade tip small wing device. Background technique [0002] When the wind turbine is running normally, the airflow on the pressure surface near the blade tip will bypass the tip of the blade and flow to the suction surface, generating blade tip vortices, which will reduce the thrust of the blade tip and reduce the output power of the wind turbine. Small wings are added to the tip of the blade to prevent the air flow around the upper and lower surfaces, reduce the induced resistance caused by the tip vortex, reduce the flow around, and increase the pressure difference between the upper and lower surfaces of the blade, so as to increase the thrust and increase the power. output effect. Through numerical simulation, it is found that the fixed winglet has little effect on the power amplification of the wind turbine at low wind speed, but i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D7/02
CPCF03D1/0675F03D7/024F05B2270/32Y02E10/72Y02P70/50
Inventor 杨瑞张浩吴卓琦刘爱瑜郭瑞张康康全佩
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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