Bolt fault monitoring system and monitoring method thereof

Abstract

The invention discloses a bolt fault monitoring system. The system comprises: a detection element (1), a control element (2) and an alarm element (5). The detection element (1) is used to detect a load or a response of a connected piece (4) which is connected through a bolt (3) and acquire a corresponding load signal or a response signal. The control element (2) is used to receive the load signal or the response signal and compare the load or the response with a predetermined threshold. When the load or the response is out of a threshold scope, the control element (2) makes the alarm element (5) emit an early warning signal. The alarm element (5) is used to emit the early warning signal according to an instruction emitted by the control element (2). Through detecting load changes or response changes of the connected piece, the bolt can be monitored whether to have a fault. A plurality of bolts on the connected piece can be simultaneously monitored so that fault monitoring of a bolt group can be realized. The invention also discloses a bolt fault monitoring method.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a bolt fault monitoring system. The present invention also relates to a fault monitoring method using the above fault monitoring system. Background technique [0002] In all kinds of mechanical equipment, it is necessary to use a large number of bolts to realize reliable connection between two adjacent parts. Because the bolt connection is reliable and can be easily disassembled, it is more and more widely used in the field of mechanical manufacturing. [0003] Taking the wind power generation system as an example, the connection between the columnar towers of the wind turbine, the connection between the tower and the nacelle, and the connection between the wind rotor blades and the hub are all bolted. The bolts used in the above-mentioned occasions need to withstand large forces, and even need to withstand changing loads. Therefore, these bolts need to have sufficient ...

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Problems solved by technology

[0005] However, the structure of this method is relatively complicated, the installation process of the angle sensor on the bolt is relatively complicated, and the maintenance is relatively difficult; at the same time, each device may include hundreds of bolts, and there are also problems in installing the angle sensor on each bolt. More difficult, not suitable for detection of group bolts

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