Wind turbine blade

Abstract

The invention discloses a wind turbine blade comprising multiple sets of blades evenly arranged with a hub as the center. Each set of blades comprise a main blade and an auxiliary blade. The auxiliaryblades are smaller than the main blades in both blade length and width, and the auxiliary blades are arranged in the upwind direction of the main blades in a parallel mode. The main blades and the auxiliary blades are fixedly connected through connecting shafts. The connecting shafts and the hub are rotationally connected. The auxiliary blades and the main blades are arranged in a parallel staggered mode. The front edges of the auxiliary blades are arranged in a staggered mode toward the rear edge direction of the main blades. The auxiliary blades adopt thin wing blades. According to the windturbine blade, the auxiliary blades are arranged in the upwind direction of the main blades, thus the blade sets with double lift force faces are formed, compressed high-pressure airflow can be captured effectively through parallel staggered arrangement of the main blades and the auxiliary blades, the blade lift-drag ratio is increased substantially, the wind energy utilization ratio of the windturbine blade is increased greatly, and the power generation amount is increased.

Description

technical field [0001] The invention relates to the technical field of wind turbine blades, in particular to a wind turbine blade. Background technique [0002] The key for wind turbines to obtain greater wind power is to have efficient blades. The aerodynamic shape design and structural form of the blade directly affect the performance and power of the wind power generation device, and are the core part of the wind power generator. Existing wind turbine blades are all set with single-layer blades, which generally have the problems of low utilization rate of wind energy and difficulty in starting at low wind speed. [0003] This shows that the above-mentioned existing wind turbine blade obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently. How to create a new wind turbine blade that can make full use of the wake, greatly increase the lift-to-drag ratio of the blade, and increase the power generation has become a goal...

AI Technical Summary

Problems solved by technology

Existing wind turbine blades are all set with single-layer blades, which generally have the problems of low wind energy utilization rate and difficulty in starting at low wind speeds

[0003] This shows that the above-mentioned existing wind turbine blade obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently

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