Combined type wind wheel blade and wind generating set comprising same

Abstract

The invention discloses a combined type wind wheel blade and a wind generating set comprising the same. The combined type wind wheel blade is characterized in that docking end surfaces of adjacent combining sections are respectively connected with inner and outer flange plates, the inner and outer flange plates are inserted to combined, and side walls of inserting combined parts are joined so as to form a rectangular groove; the rectangular groove is divided into multiple sections, and the outer flange plate arranged between the adjacent sections is provided with an opening (wedge-shaped stripe inserting hole); the wheel blade also comprises multiple groups of wedge-shaped strip belts the number of which is equal to that of sections of the rectangular grooves, left and right wedge-shaped stripes of each group of wedge-shaped stripes are respectively inserted into the rectangular grooves from openings of the two ends of the rectangular groove of the same section in the reverse direction, so as to form interference fit with the rectangular grooves, and opening parts of subsections of the rectangular grooves are also fixedly provided with connecting end cap. The combined type wind wheel blade and the wind generating set provided by the invention have the advantages that the structure is simple, the connection is reliable, the assembly is simple and convenient, the production efficiency is high, the pneumatic appearance of the blade is guaranteed, the manufacture and transportation difficulty of a large-scale wind wheel blade are greatly reduced, the production and transportation costs are reduced, the production and transport efficiencies are improved, and local rapid assembly is realized.

Description

technical field [0001] The present invention relates to the field of components of a wind power generating set and wind rotor blades, in particular to a combined wind rotor blade and a wind power generating set containing the same. Background technique [0002] Wind power is a clean and renewable green energy, and its development and utilization has become a form of energy that countries around the world are vying to adopt in the 21st century. The improvement of the aerodynamic shape of the blade and the increase of the length of the blade are important technical means to increase the power of wind power generation. Therefore, the design and manufacture of large blades has become an important link in wind power technology. At present, the blade length has reached nearly 70 meters from more than 30 meters. This greatly increases the difficulty of manufacturing and transporting large wind turbine blades. Manufacturing and transportation are inefficient, costly, and risky. T...

AI Technical Summary

Problems solved by technology

[0010] The shaft-type screw connection method is to connect the two blades together by means of a through-hole connecting rod inside the blade. The outer surface of the blade is smooth when it is static. Since the connecting rod is only connected at the center point, the blade is rotated by the wind force. Under the action of external aerodynamic force and torque, the deformation of the butt joint surface will produce gaps and steps to generate turbulence, which reduces the efficiency of the blades in obtaining wind energy.

[0011] All three types of screw connection will cause the blade surface to be uneven. After assembly, it is necessary to fill the bolt groove or install a fairing on the protruding part of the screw connection. The assembly work is more cumbersome, and the risk of bolt loosening or breaking is also borne.

[0013] This shows that the above-mentioned existing combined wind rotor blade obviously still has inconvenience and defects in the connection mode, and needs to be further improved urgently.

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