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

Claim 8:
9. 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; and
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,
wherein the calculation step includes a sub-step of calculating the thrust load from the temperature of the thrust bearing in the first temperature measurement step based on a reference data showing a relationship between the thrust load and the temperature of the thrust bearing and counting the frequency at which the calculated thrust load serving as the evaluation index exceeds the allowable value.