Subsection blade of wind turbine and assembling method thereof

Abstract

The invention discloses a subsection blade of a wind turbine and an assembling method thereof. The subsection blade of the wind turbine is formed by two sections or more than two sections of composite material blade sections; a metal bolt sleeve is embedded at a connecting place of the blade sections, adjacent blade sections are connected by using a double-end reverse threaded bolt through a steel wire rope passing through a small hole on a bolt head to form an integral wind turbine blade. By adopting the subsection blade, the problem of difficult transportation of long blades can be solved and the transportation cost is reduced. Meanwhile, the subsection blade of the wind turbine has a simple connecting structure and high reliability and is convenient to assemble on site.

Description

technical field [0001] The invention relates to a blade of a wind power machine, in particular to a segmented blade of a wind power machine, which belongs to parts of wind power generating equipment. Background technique [0002] The shortage of energy and the deterioration of the ecological environment have promoted the development of wind power generation. In order to capture more energy and improve the efficiency of wind energy utilization, the capacity of wind turbines has been increasing, from the initial watt level to the kilowatt level, and to today's megawatt and At the multi-megawatt level, the length of the blades also increases. At present, the longest commercial blade has reached 61.5 meters. In Europe, commercial wind turbines with a single unit capacity of 7MW and a blade length of about 80 meters have entered the final testing stage. 8-10MW blades are also under development, and the blade length will be further increased. However, the existing transportation ...

AI Technical Summary

Problems solved by technology

[0004] Segmented blades need to be assembled into complete blades during use. During the connection process of segmented blades in the prior art, slots are processed at the joints of the blades, and fillers are added to the slots for bonding, and are separately tightened. The segmented blades are connected together by superimposed reinforcement structures on the inner and outer surfaces, but such a structural arrangement has less consideration for the loads borne by the wind turbine during actual operation and the convenience of on-site installation. At the same time, when fasteners and superimposed structures are applied in actual engineering, problems such as insufficient strength at the joint of blades and large aerodynamic loss, etc., and the disadvantages of complex actual assembly operations, high costs, and high risks, however, segmental wind turbines The structure of the blade itself directly affects its assembly method, so it is necessary to improve the structure and assembly method of the existing wind turbine segmented blades

Images