Based On Vibration And Load Monitoring Of Wind Turbine Failure Analysis

With the increasing number of wind farm construction,wind turbine maintenance cost has being concerned. On-line monitoring and fault diagnosis of wind turbine failure analysis system can significantly reduce maintenance costs and increase the effectiveness of wind farm. To wind turbine for research object, we focus on the use of wind turbine vibration and load monitoring data for health assessment, analysis of the failure parts fault unit, judge failure degree and key components failure time. Development of wind turbine predictive maintenance systems to provide key technology.Studied the structure of wind turbine drive system, application software of Solidworks2010established a three-dimensional model transmission unit.Analysis of failure modes and failure of wind turbine transmission failure in the form of key components. A group of sixteen wind farms of the six models wind turbine of vibration test, studies the typical of vibration testing sensor arrangement and the vibration of on-line monitoring sensor arrangement principle and methods.Based on the VDI3834standard, summarizes the vibration signal analysis of general step. Application vibration analysis software of Commtest to analysis of collected vibration signals, summarizes each wind turbine typical fault failure, the failure parts and various analysis method to the sensitive degree of all kinds of faults, tracked a particular wind turbine generator bearing fault features batch, analyses the causes of the failure causes of batch and put forward the fault processing measures.Studied wind turbine of operating conditions and run-time load suffered. Analysis of the wind turbine load test the principle of strain gauge layout.Selected the hub coordinate system on wind turbine a full load test conditions.Used Python software programming applications in the data excluding the interference of the test load points and theories can not point.For the unit to provide data to support failure analysis. The planetary gear of wind turbine gearbox for the fatigue life analysis of objects, the stress analysis and operation condition analysis. The application of the software ANSYS Workbench12to planet carrier for pre-treatment, to get the unit load and unit torque static stress analysis results.Selected Fe-safe5.4fatigue life analysis software.A good load data input processing, static stress analysis results and number of cycles and other key parameters of the planet carrier for fatigue analysis, the analysis of documents fileResults.rst. Application of classical ANSYS12post-processing of analysis results, the planet carrier to get contour and residual fatigue life cycles. Establishment of wind turbine predictive maintenance file for the wind turbine on-line monitoring and fault diagnosis and failure analysis system provides a key technology.