Monitoring method and monitoring system for pitch bearing

Abstract

The invention relates to a monitoring method and a monitoring system for pitch bearings. The pitch bearing (100) includes a bearing end face (130, 140) and bolt holes (1-54) opened on the bearing end face (130, 140), wherein the monitoring method includes: using a fiber grating The sensing and measuring system (500) monitors the temperature parameters and strain parameters of the bearing end surfaces (130, 140) or the bolt holes (1-54); and uses the temperature parameters to monitor the bearing end surfaces (130, 140) or the strain parameters of the bolt holes (1-54) are corrected to obtain actual strain parameters.

Description

technical field [0001] The invention relates to the technical field of monitoring bearings, in particular to a monitoring method and a monitoring system for variable pitch bearings. Background technique [0002] Energy is the main material basis of social economy and human life, and the driving force of social development. However, the reserves of non-renewable energy such as petroleum, coal, and natural gas, which are the main pillars of energy in the world, are decreasing day by day. All countries in the world are developing wind power generation. As a new energy source, wind power generation has formed a mature scale. [0003] A wind turbine is a device that converts wind energy into electrical energy. In a wind turbine, the pitch bearing, as the connecting part between the blade and the hub, plays a very important role in the pitch change process of wind power generation. Pitch adjustment is to change the angle of attack of the airflow on the blades by adjusting the ang...

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Problems solved by technology

Moreover, the working environment of the pitch bearing is harsh, and the ambient temperature gradient is large, and the pitch bearing may also cause failure due to temperature changes affecting the lubrication of the grease and the characteristics of the material.

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