Wheels, blades and blade segments of wind turbines

A technology for wind turbines and blades, which is used in the control of wind turbines, wind turbines, and wind power generation, etc., can solve the problems of unreasonable blade design, aggravated vibration, and increase the maximum lift coefficient of the airfoil, so as to reduce the sensitivity of roughness. performance, delaying flow separation, reducing the risk of stalling
CN112963298BActive Publication Date: 2022-06-28SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI ELECTRIC WIND POWER GRP CO LTD
Publication Date
2022-06-28

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Abstract

The invention provides an impeller, a blade and a blade section of a wind power generating set, the blade section includes a blade front section and a blade rear section, the blade front section includes a first main body, and the first main body includes a first connecting surface; the blade rear section includes a second main body and a blade rear section. The airbag, the second body is made of flexible material, the second body includes a second connection surface, the second body is fixedly connected with the first body; a cavity is arranged in the second body, the airbag is accommodated in the cavity, and the airbag includes an airbag wall , there is an air chamber in the airbag wall, when the environmental parameters at the location of the wind turbine meet the set parameter conditions, the volume of the gas in the air chamber increases, squeezing the airbag wall, causing the airbag wall to expand and squeeze the cavity The inner wall of the second main body expands at the corresponding position; when the environmental parameters meet the set parameter conditions, the blade stalls. The invention can effectively reduce the risk of blade stall.
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Description

technical field

[0001] The present invention relates to the field of wind turbines, in particular to an impeller, blades and blade segments of a wind turbine. Background technique

[0002] The blades of wind turbines are the core components for absorbing wind energy, and the operating state of the blades directly affects the wind energy absorption efficiency, noise level and structural safety of wind turbines. Sometimes the wind turbines may run in the transitional section of the wind turbine due to the unreasonable blade design, the ambient air density during the operation of the wind turbine is significantly lower than the designed air density, and the expansion of the wind turbine. The operating range between the wind speed corresponding to the rotational speed and the wind speed corresponding to the rated power of the wind turbine) becomes longer, etc., so that there is a risk of local stall at the blade tip. The output power of the wind turbine after the stall is signi...

Claims

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