Abstract: A device for evaluating the service life of a bearing includes an operating condition obtainment unit configured to obtain a current operating condition of the bearing, a first acquisition unit configured to acquire a current vibration signal of the bearing under the current operating condition, a computation unit configured to compute a current vibration value of the bearing, a spalling obtainment unit configured to obtain a current surface spalling area of the bearing corresponding to the current vibration value of the bearing and further configured to obtain a current spalling rate of the bearing under the current operating condition, and a replacement reminder unit configured to transmit a bearing replacement reminder information when the current surface spalling area of the bearing is detected to be greater than a predetermined first area.

Abstract: Disclosed are a workpiece and a method for monitoring water content of a lubricant thereof, wherein the monitoring method comprises a water content sensing unit (10) being provided in the workpiece and exposed in a lubricant inside the workpiece, the water content sensing unit (10) and a radio frequency tag (20) being located in one and the same circuit (S1), the electrical property of the water content sensing unit (10) changing along with changes in the water content of the lubricant, and the electrical property including at least one of resistance, inductance and capacitance; determining a correlation between a frequency-related parameter of the radio frequency tag (20) and the water content in the lubricant (S2); acquiring the actual frequency of the radio frequency tag (20) (S3); and according to the correlation and the actual frequency, determining the actual water content of the lubricant (S4).

Abstract: A device for evaluating the service life of a bearing includes an operating condition obtainment unit configured to obtain a current operating condition of the bearing, a first acquisition unit configured to acquire a current vibration signal of the bearing under the current operating condition, a computation unit configured to compute a current vibration value of the bearing, a spalling obtainment unit configured to obtain a current surface spalling area of the bearing corresponding to the current vibration value of the bearing and further configured to obtain a current spalling rate of the bearing under the current operating condition, and a replacement reminder unit configured to transmit a bearing replacement reminder information when the current surface spalling area of the bearing is detected to be greater than a predetermined first area.