Abstract
For the problem of bolt loose in the long-term operation of offshore wind turbine, we proposed a bolt loose judging device for offshore wind turbine. The bolt loose judging device for offshore wind turbine included vibration sensor, signal receiving and transmitter, CCD sensor, data analyzer, power supply, the communication line and the power supply line. The combination of data analyzer and CCD sensor was used to analyze whether the prefabricated symbols on the bolts change, so as to judge whether the bolts are loose. The whole system (except vibration sensor) has been in standby and dormant state at ordinary times, which is more simple and reliable under the harsh conditions at sea.
Highlights
The operating environment of offshore wind turbine is worse than that of inland
According to the existing literature[3,4,5], the main causes of bolt loosening were as follows: 1 There is a deviation in the installation of main operating parts of the fan, which leads to a large vibration during the operation of the fan and the gradual loosening of the nuts of the bolts
We proposed a bolt loosening judgment device for offshore wind turbine
Summary
In the normal operation of offshore wind turbine, and the bolts of the connecting parts are easy to loosen because of the long-term operation in the resultant force of various vibrations. According to the existing literature[3,4,5], the main causes of bolt loosening were as follows: 1 There is a deviation in the installation of main operating parts of the fan, which leads to a large vibration during the operation of the fan and the gradual loosening of the nuts of the bolts. Compared with other methods of judging bolt looseness, the strategy of this method is simple, the whole system (except vibration sensor) has been in standby and dormant state at ordinary times, and the device is more simple and reliable under the harsh conditions at sea
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