Bearing condition monitoring device, turbocharger and bearing condition monitoring method

摘要

The bearing condition monitoring apparatus is a bearing state monitoring apparatus for monitoring the state of the thrust bearing for holding the rotary shaft in the thrust direction.The bearing condition monitoring device counts the number of times the first temperature sensor for measuring the temperature of the thrust bearing and the number of times that the evaluation index for the thrust load based on the measurement value of the first temperature sensor exceeds the allowable value, and when the count number exceeds the threshold value An apparatus for outputting an abnormality in the state of the thrust bearing is provided.The calculation device may count only when the thrust load exceeds the upper limit load for a predetermined time or more.