Method and system for monitoring state of bolt connecting pieces of fan blade and variable pitch bearing

A technology of variable pitch bearings and fan blades, applied in the field of monitoring, can solve the problems of being unable to identify whether the bolts are loose or broken in time, and achieve the effects of preventing the risk of blade falling, preventing cost loss, and fine-tuning and dimension management

Active Publication Date: 2020-06-19
CYBERINSIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manual inspection method is relatively passive, and it is impossible to identify whether the bolts are loose or broken in time

Method used

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  • Method and system for monitoring state of bolt connecting pieces of fan blade and variable pitch bearing
  • Method and system for monitoring state of bolt connecting pieces of fan blade and variable pitch bearing
  • Method and system for monitoring state of bolt connecting pieces of fan blade and variable pitch bearing

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Embodiment Construction

[0063] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0064] Embodiments of the present invention provide a method and system for monitoring the state of bolted joints between fan blades and pitch bearings. One or more displacement sensors are used to collect and determine the distance information corresponding to each bolted joint in the first monitoring area in real time. The distance information of each bolt connection is statistically determined to determine the position change information of the bolt connection, and then it is determined whether the state of the bolt connection is abnormal according to the position change information of the bolt connection.

[0065] Such as figure 1 As shown, it is a flow chart of the method for monitoring the state of the fan...

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Abstract

The invention discloses a method and system for monitoring a state of bolt connecting pieces of a fan blade and a variable pitch bearing. The method comprises the steps of collecting and determining distance information corresponding to all the bolt connecting pieces in a first monitoring area in real time by utilizing one or more displacement sensors; counting and determining position change information of the bolt connecting pieces according to the distance information of the corresponding bolt connecting pieces; and determining whether the state of the bolt connecting piece is abnormal or not according to the position change information of the bolt connecting piece. By means of the method, the state of the bolt connecting piece at the connecting position of the fan blade and the variable pitch bearing can be monitored online in real time, and the cost loss and blade falling risk caused by the abnormal state of the bolt connecting piece are effectively prevented.

Description

technical field [0001] The invention relates to the field of monitoring technology, in particular to a method and a system for monitoring the state of a fan blade and a pitch bearing bolt connection. Background technique [0002] The blade is the key component of the wind catcher. As the root of the cantilever beam, the blade root bears a large load. Part of the load is transmitted through the bolt, and part of the load is transmitted through the contact surface between the blade root and the bearing. It is necessary to ensure the safety of the bolt through the pre-tightening force. The level of pre-tightening force is affected by various factors such as assembly (such as lubrication), fixed dimension and fan vibration, load level, etc. Unexpected relaxation and fracture may occur during operation. [0003] In order to pursue a lower cost per unit of electricity (the cost per unit of electricity refers to the cost embodiment of the comprehensive investment value of the power...

Claims

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Application Information

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IPC IPC(8): F03D17/00
CPCF03D17/00
Inventor 朱小芹于成铭金超卿培祝海鲍亭文
Owner CYBERINSIGHT TECH CO LTD
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