Wind generating set blade root bolt fracture monitoring method

Abstract

The invention provides a wind generating set blade root bolt fracture monitoring method which comprises the steps that a high-precision distance measuring sensor is installed on a hub web; the distances between the end of a blade root bolt and the high-precision distance measuring sensor, between a nut and the high-precision distance measuring sensor, and between a blade root flange and the high-precision distance measuring sensor are monitored in real time; an acquisition instrument acquires the distance values monitored by the high-precision distance measuring sensor in real time; a fan master controller reads the distance values acquired by the acquisition instrument in real time and uploads the distance values to a wind field central control server; and the wind field central control server judges the condition of the blade root bolt according to the distance value monitored by the high-precision distance measuring sensor. According to the wind generating set blade root bolt fracture monitoring method provided by the invention, whether the blade root bolt is fractured or seriously loosened or not is judged by monitoring the distances between the end of the blade root bolt of a wind generating set and a distance measuring sensor probe, between the nut and the distance measuring sensor probe, and between the flange and the distance measuring sensor probe, and the situation that the blade root bolt is fractured or seriously loosened can be comprehensively monitored, so that fault alarm is achieved; and the wind generating set blade root bolt fracture monitoring method has the advantages of being simple in process, low in cost, high in precision and high in reliability.

Description

technical field [0001] The invention relates to a method for monitoring the fracture of a blade root bolt of a wind power generating set, and belongs to the technical field of monitoring flange connection bolts of the wind generating set. Background technique [0002] At present, the connection between the blade root and the hub is generally connected by pre-embedded blade root high-strength bolts. The bolts in the flange connection structure are subjected to tension and compression cycles under alternating loads. Under the action of alternating tension and compression loads, the plastic deformation of the thread will cause the bolts to break or be seriously loosened, which will affect the normal operation of the unit, and even cause accidents such as blade drop and tower collapse, which will bring great harm to wind power enterprises. economic loss. [0003] The existing wind turbine blade root bolt fracture judgment mainly adopts the following methods: [0004] Existing...

AI Technical Summary

Problems solved by technology

However, this technical solution needs to install a circlip on each bolt, the process is complicated, the construction time and cost are high, and the breaking strength of the steel wire rope is difficult to control. The bolt may break, but the steel wire rope does not break, and the alarm cannot be reported, and the monitoring is not accurate.

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