The main diagnostic techniques for diesel engine mechanical faults include vibration method, thermal parameter analysis method, oil analysis method, infrared temperature measurement method, etc.

 
(1) Thermodynamic parameter analysis method: mainly detects the performance parameters of diesel engine. Calculate the indicated work, pressure rise rate and compression pressure according to the construction drawing to judge the combustion state.

(2) Vibration analysis method: the serious wear and corrosion of parts leads to the increase of clearance caused by deformation. The transmission of vibration signals shows the changes of some internal and external parameters. Its advantages are fast speed, high accuracy, strong positioning, and wide range of use. It can achieve the results of initial detection and timely diagnosis to protect the use of the machine. Although it has many uses, it still has many shortcomings, such as mutual interference of various factors, The R&D and upgrading of such machines should be expanded in the future technological development.

(3) Oil analysis method: judge the wear degree by the state of wear particles in the lubricating oil.

(4) Instantaneous speed analysis method: This method is used to determine the fault location, accurately judge the cause of the fault, and improve the efficiency.

The above describes the causes of and solutions to three common diesel generator set failures. During the operation of the diesel generator set, users should be fully aware of the machine and its working principle. At the same time, attention should be paid to the maintenance and repair of the diesel generator set. Regular maintenance can improve the efficiency and service life of the diesel generator set.