Atypical Failure Analysis of Double Headed Bolts in Wind Power Gearbox
During the inspection process,wind power personnel at a certain wind farm discovered that the high-strength bolts of the gearbox unit had broken.Our company was co mmissioned to analyze this phenomenon.This article uses a direct reading spectrometer to analyze the chemical composition of the fractured screw,a universal tensile machine to analyze the mechanics of the fractured screw,a Rockwell hardness tester to analyze the hardness of the fractured material,a metallographic microscope to analyze the microstructure of the fracture,and a scanning electron microscope to investigate and analyze the morphology and processing defects of the fracture.Through comprehensive analysis and investigation,and using finite element simulation technology to simulate the defective thread,the problem is ultimately located as fatigue fracture caused by folding defects in thread processing.
Wind powerGearboxHigh-strength double head boltsFracture failure
NETL
NSTL
万方数据
