Patent ID: 11953054
Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. A bearing condition monitoring method for monitoring a condition of a thrust bearing for holding a rotational shaft in a thrust direction, the method performed by a condition monitoring device, the method comprising:
a first temperature measurement step of measuring a temperature of the thrust bearing;
a calculation step of calculating a thrust load on the basis of a measurement value of the temperature of the thrust bearing;
a count step of counting a frequency at which an evaluation index of the thrust load calculated in the calculation step exceeds an allowable value;
an output step of outputting an abnormality in the condition of the thrust bearing if the frequency counted in the count step exceeds a threshold;
a second temperature measurement step of measuring a temperature of a bearing housing for housing the thrust bearing; and
a change step of changing the evaluation index or the allowable value based on the temperature of the bearing housing in the second temperature measurement step.