Fault diagnosis method and system for variable pitch bearing of wind generating set

Abstract

The invention provides a fault diagnosis method and system for a variable pitch bearing of a wind generating set. The system comprises a fixing assembly used for fixedly connecting a blade flange and a hub flange; the fixing assembly comprises an inner ring and an outer ring, and the outer ring is arranged on the outer side of the inner ring in a sleeving mode; the upper end of the outer ring is connected with the blade flange; the lower end of the inner ring is connected with the hub flange; a bearing ring is embedded in the outer wall of the inner ring, and the outer wall of the bearing ring is fixed on the inner wall of the outer ring; and the bearing ring is provided with a monitoring unit, the monitoring unit is used for monitoring faults of the variable pitch bearing and transmitting monitoring signals to a control center, and the control center is connected with an alarm unit. With the fault diagnosis method and system adopted, the blade falling time can be prolonged, early warning is carried out for workers, so that the workers can perform timely maintenance or replacement, and the safety of the wind generating set after long-term use is improved.

Description

technical field [0001] The invention relates to the technical field of wind power generators, in particular to a fault diagnosis method and system for a pitch bearing of a wind power generator set. Background technique [0002] A wind turbine is a power device that converts wind energy into mechanical work, which drives the rotor to rotate, and finally outputs alternating current. Wind turbines are generally composed of components such as wind rotors, generators (including devices), steering devices (tail fins), towers, speed limit safety mechanisms, and energy storage devices. However, with the continuous improvement of wind power generation technology, wind turbines The deficiencies in the actual use of pitch bearings also urgently need to be improved. [0003] In the prior art, the common wind turbine pitch bearings on the market can only alleviate problems such as corrosion of the mounting holes of the inner and outer rings in actual work, and cannot completely avoid th...

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Problems solved by technology

Wind turbines are generally composed of components such as wind rotors, generators (including devices), steering devices (tail fins), towers, speed limit safety mechanisms, and energy storage devices. However, with the continuous improvement of wind power generation technology, wind turbines The deficiencies in the actual use of pitch bearings also urgently need to be improved

[0003] In the prior art, the common wind turbine pitch bearings on the market can only alleviate problems such as corrosion of the mounting holes of the inner and outer rings in actual work, and cannot completely avoid the phenomenon of fracture of the pitch bearing after long-term use. At the same time, for the pitch bearing When a break occurs, the alarm and lock cannot be performed in time, and the operating time is reserved for the staff, which reduces the safety of the wind turbine after long-term use

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