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Vibration time-frequency images of wind turbine planetary gearboxes
- Citation Author(s):
- Submitted by:
- pinyang zhang
- Last updated:
- Mon, 05/09/2022 - 05:22
- DOI:
- 10.21227/0zxx-m405
- License:
66 Views- Categories:
- Keywords:
Abstract
The vibration signals used in this dataset were collected from 1.5 MW wind turbines in June 2020. The wind farm locates in eastern China. The planetary gearbox contains two-stage planetary and one-stage parallel transmission mechanisms. Vibration signals were acquired using a piezoelectric accelerometer (VIB 6.140) mounted on the ring of the second-stage planetary mechanism of the gearbox by a DAQ system with a sampling frequency of 16384 Hz. There are four health conditions in the dataset: normal, ring gear tooth pitting, planetary gear meshing misalignment, and pitting-misalignment concurrence. All considered fault conditions occurred on the second-stage planetary mechanism. Each health condition corresponds to four gearboxes. We used the generalized S-transform algorithm to generate vibration time-frequency maps and labeled each one of them.
Original vibration signals last for 10 seconds. We randomly intercepted ten segments from each vibration signal. The generalized S-transform (generalized factor = 2) was used to generate 512×512 size time-frequency spectrums from signal segments. The characteristic patches or bands were highlighted with a gray level of 255. The gray level of other parts was set to 0. All images in 'time_frequency_image' folder correspond to those in 'label' folder one by one.
