Variable-pitch bearing high-strength steel crack detection system

Abstract

The invention provides a variable-pitch bearing high-strength steel crack detection system which comprises a bearing base plate with a mounting seat on the surface, a driving motor with a motor shaft horizontally arranged is mounted on the surface of the mounting seat, and a mounting plate fixed to the tail end of the motor shaft. A microcontroller, a sinusoidal signal generator, an eddy current probe, a self-balancing circuit, a phase detection filtering module, an analog-to-digital conversion module and a wireless transmission module are arranged on the mounting plate, and the sinusoidal signal generator generates a sinusoidal excitation signal to act on the eddy current probe; the eddy current probe excites eddy current on the axial end face of the tested variable pitch bearing through a probe coil of the eddy current probe, and the probe coil sends a crack impedance signal generated by eddy current change to the phase detection filtering module through a self-balancing circuit to be amplified and filtered. The analog-to-digital conversion module collects the amplified and filtered crack impedance signals, carries out analog-to-digital conversion on the crack impedance signals and then sends the signals to the microcontroller, and the signals are transmitted to the computer through the wireless transmission module to be processed to generate a crack impedance diagram. According to the invention, the crack of the variable-pitch bearing can be rapidly and accurately detected.

Description

technical field [0001] The invention relates to the technical field of crack detection of pitch bearings, in particular to a crack detection system for high-strength steel of pitch bearings. Background technique [0002] Pitch change is the process of changing the angle of wind turbine blades, and the pitch change bearing is the bearing used for the pitch change mechanism. The function of the pitch bearing is to rotate the blade installed on the hub. The inner ring is connected to the hub through bolts, and the outer ring is connected to the blade. When the wind speed is too high or too low, the angle of attack of the airflow on the blade can be changed by adjusting the pitch of the blade. , so as to change the aerodynamic torque obtained by the wind turbine and keep the power output stable. The pitch bearing is an important core component of the pitch control transmission system of the wind turbine. Because the magnitude and direction of the load acting on the blade change...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of low detection efficiency and inaccurate detection results, the present invention provides a high-strength steel crack detection method for pitch control bearings. Detection Systems

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