Wind power sectional-type blade

Abstract

The invention discloses a wind power sectional-type blade, which comprises at least two blade sections. All the blade sections are connected in sequence through a connecting elements into a whole. The connecting element mainly comprises a connecting substrate, a plurality of blade connecting bolts and nuts of which the number corresponds to that of the blade connecting bolts, wherein both tips of the connecting substrate are respectively matched with the but joint end parts of the adjacent blade sections; the tips of the connecting substrate and the but joint end parts of the blade sections are respectively provided with a plurality of bolt holes which correspond to one another; each blade connecting bolt penetrates into the corresponding bolt holes in the connecting substrate and the blade sections; and the nuts are locked on the blade connecting bolts. According to the wind power sectional-type blade disclosed by the invention, on the premise of not influencing the air performance of the blade, the blade is designed into a plurality of blade sections, thereby, the manufacturing difficulty is reduced, the subsequent transportation work is greatly facilitated, the manufacturing and transportation cost is effectively controlled, and the assembled blade has high strength and is stable and reliable.

Description

technical field [0001] The invention relates to a blade for wind power generation, in particular to a segmented blade for wind power generation. Background technique [0002] The principle of wind power generation is to use the wind to drive the blades of the windmill to rotate, and then increase the speed of rotation through the speed increaser to drive the generator to generate electricity. Therefore, the blade is one of the important components of wind power generation. [0003] As the power of wind turbines continues to increase, the length of the blades is also increasing. However, the increase in blade length increases manufacturing difficulty, high product scrap rate, and significantly increases production costs; in addition, it also brings a lot of inconvenience to subsequent transportation operations, which are mainly reflected in: 1. The railway and highway management departments of various countries in the world For safety considerations, there are a series of s...

AI Technical Summary

Problems solved by technology

However, the increase in blade length increases manufacturing difficulty, high product scrap rate, and significantly increases production costs; in addition, it also brings a lot of inconvenience to subsequent transportation operations, which are mainly reflected in: 1. The railway and highway management departments of various countries in the world For safety considerations, there are a series of strict restrictions on the length and height of cargo; 2. In order to use better wind energy resources and avoid disturbing the people, most wind farms are built in coastal islands, grassland pastoral areas, mountains and plateaus. This makes the wind farm relatively remote and inconvenient, and the transportation of large blades is difficult and costly

[0004]In order to overcome the above problems, various wind power equipment manufacturers and related research institutes have conducted a lot of research on the structure of blades, and their research results have been frequently reported in public publications. For example, "a segmented blade of a wind turbine and its assembly method" disclosed in the Chinese patent literature (publication number: CN102192110A, publication date: 2011.09.21), although this technology discloses that multiple blade segments are sequentially composed of integral blades, it is convenient to manufacture and However, each blade segment is connected by multiple double-headed reverse bolts, which not only interrupts the profile design of the blade, affects the aerodynamic performance of the blade, but also reduces the overall strength of the blade, which is stable and reliable poor sex

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