Method and device for evaluating service life of bearing

A device for evaluating a service life of a bearing, comprising:

• 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 area obtainment unit configured to obtain a current surface spalling area of the bearing corresponding to the current vibration value of the bearing;
• a spalling rate obtainment unit configured to obtain a current spalling rate of the bearing under the current operating condition;
• and
• a bearing service life obtainment unit configured to obtain a residual service life of the bearing in response to the current surface spalling area of the bearing and the current spalling rate of the bearing.

A device for evaluating the service life of a bearing, comprising:

• 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.