- 数据链接https://ti.arc.nasa.gov/tech/dash/groups/pcoe/prognostic-data-repository/
- IMS链接: http://www.iucrc.org/center/nsf-iucrc-intelligent-maintenance-systems
http://imscenter.net/
An AC motor, coupled by a rub belt, keeps the rotation speed constant. The four bearings are in the same shaft and are forced lubricated by a circulation system that regulates the flow and the temperature. It is announced on the provided “Readme Document for IMS Bearing Data” in the downloaded file, that the test was stopped when the accumulation of debris on a magnetic plug exceeded a certain level indicating the possibility of an impending failure. The four bearings are all of the same type. There are double range pillow blocks rolling elements bearing.
Three (3) data sets are included in the data packet (IMS-Rexnord Bearing Data.zip). Each data set describes a test-to-failure experiment. Each data set consists of individual files that are 1-second vibration signal snapshots recorded at specific intervals. Each file consists of 20,480 points with the sampling rate set at 20 kHz. The file name indicates when the data was collected. Each record (row) in the data file is a data point. Data collection was facilitated by NI DAQ Card 6062E. Larger intervals of time stamps (showed in file names) indicate resumption of the experiment in the next working day.
- Rexnord ZA-2115 Characteristics
Parameter name | imperial | metric |
---|---|---|
Pitch diameter | 2.815 inch | 71.5mm |
Rolling element diameter | 0.331 inch | 8.4mm |
Number of rolling element per row | 16 | 16 |
Contact angle | 15.17° | 15.17° |
Static load | 6000 lbs | 26690 N |
- Recording Duration: October 22, 2003 12:06:24 to November 25, 2003 23:39:56
- No. of Files: 2,156
- No. of Channels: 8
- Channel Arrangement: Bearing 1 – Ch 1&2; Bearing 2 – Ch 3&4; Bearing 3 – Ch 5&6; Bearing 4 – Ch 7&8.
- File Recording Interval: Every 10 minutes (except the first 43 files were taken every 5 minutes)
- File Format: ASCII
- Description: At the end of the test-to-failure experiment, inner race defect occurred in bearing 3 and roller element defect in bearing 4.
- Recording Duration: February 12, 2004 10:32:39 to February 19, 2004 06:22:39
- No. of Files: 984
- No. of Channels: 4
- Channel Arrangement: Bearing 1 – Ch 1; Bearing2 – Ch 2; Bearing3 – Ch3; Bearing 4 – Ch 4.
- File Recording Interval: Every 10 minutes
- File Format: ASCII
- Description: At the end of the test-to-failure experiment, outer race failure occurred in bearing 1.
- Recording Duration: March 4, 2004 09:27:46 to April 4, 2004 19:01:57
- No. of Files: 4,448
- No. of Channels: 4
- Channel Arrangement: Bearing1 – Ch 1; Bearing2 – Ch 2; Bearing3 – Ch3; Bearing4 – Ch4;
- File Recording Interval: Every 10 minutes
- File Format: ASCII
- Description: At the end of the test-to-failure experiment, outer race failure occurred in bearing 3.
Number of files | Number of channels | Endurance duration | Duration of recorded signal | Announced damages at the end of the endurance | |
---|---|---|---|---|---|
Dataset 1 | 2156 | 8 | 49680 min 34 days 12h | 36 min | Bearing 3: inner race Bearing 4: rolling element |
Dataset 2 | 984 | 4 | 9840 min 6 days 20h | 16 min | Bearing 1: outer race |
Dataset 3 | 4448 | 4 | 44480 min 31 days 10h | 74 min | Bearing 3: outer race |
Characteristic frequencies | |
---|---|
Shaft frequency | 33.3 Hz |
Ball Pass Frequency Outer race (BPFO) | 236 Hz |
Ball Pass Frequency Inner race (BPFI) | 297 Hz |
Ball Spin Frequency (BSF) | 278Hz (2x139 Hz) |
Fundamental Train Frequency (FTF) | 15 Hz |
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