| 摘要 |
PROBLEM TO BE SOLVED: To detect an abnormality of a tilting bearing of an iron making converter facility which is a rotary machine of a low speed and having less one rotation.SOLUTION: In an iron making converter facility, slag is removed from a furnace body (P7), and after that, a vibration signal of a bearing measured in the furnace body rotated in an empty pot state until the furnace body stands upright (P1) is collected, and an abnormality of the bearing is detected based on the vibration signal. At that time, the vibration signal measured for about six to 10 seconds may be collected. Further, one or more parameters are calculated among a speed peak value of the vibration speed, an acceleration speed peak value of the vibration acceleration, an acceleration RMS value, an outer ring lesion frequency component value of the bearing, an inner ring lesion frequency component value of the bearing, a rolling element lesion frequency component value, a distortion degree of the vibration speed, and a degree of steepness of the vibration speed based on the vibration signal. The calculated parameters may be monitored so that the abnormality is detected. Thus, the abnormality of a tilting bearing of the iron making converter facility which is a rotary machine of a low speed and having less-than-one rotation can be detected. |
