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Experimental Study on Monitoring the Wear of Journal Bearings of Diesel Engine by Thermoelectric Method

The experimental research on monitoring wear of main journal bearings by thermoelectric method for a diesel engine is introduced mainly in the article. The measured thermoelectric signals is related to intensity of the friction and the rotational speed on a sliding bearing test bench. The thermoelectric effect and the weak signals caused by the friction between the eccentric rotor and the sliding bearing are detectable. The thermoelectric signal peaks are pointed to the different cylinder ignition points on a diesel engine test bench. It is shown that the wear of the different main journal bearings is localizable.