Centering fastener, its manufacturing method, using method and wind power generating set

Abstract

The invention provides a centering fastener, its manufacturing method, its use method and a wind power generating set. The centering fastener includes: a connecting main body, a buffer lining and a centering member, wherein the connecting main body is a columnar body, including a connecting portion and a polished rod portion; the buffering inner liner covers at least part of the polished rod portion in a ring shape; The centering member is covered on the outer surface of the buffer lining; wherein, at least at the position of the buffer lining, the polished rod part is separated from the centering member. The buffer lining of the middle layer separates the polished rod part of the connecting body from the centering member, and forms a layered positioning connection structure through the centering member, buffer lining and connecting body from outside to inside. The external force on the parts is also weakened layer by layer from the outside to the inside. While realizing the positioning connection, it can also protect the connecting main body, effectively solving the problem of fatigue failure of the connecting main body due to stress concentration.

Description

technical field [0001] The invention relates to the technical field of fastener connection, in particular to a centering fastener, its manufacturing method, its use method and a wind power generating set. Background technique [0002] As a universal connector, fasteners are usually installed in the mounting holes of the connected parts and need to have a certain strength to resist damage from external forces. In wind turbines, bolts (studs), as a main connecting fastener, play an important role in positioning and connection. Their strength directly affects the stability and reliability of the wind turbine. When the unit is running, due to the complex working conditions, The connecting bolts (studs) between key large parts are loaded with complex and large variable loads, which require the bolts (studs) to have high fatigue strength. Generally, a large number of high-strength connections are evenly distributed around these connected parts. Bolts, such as the segmental connec...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a centering fastener, its manufacturing method, use method and wind power generating set, which can solve the problem of fatigue failure of the centering fastener due to stress concentration at the location of the positioning connection

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