Experimental data on the vibration of the rotor system of a ball bearing turbocharger under basic excitation

Due to the limited rotational speed achievable by pneumatic driving and the difficulty of maintaining low-speed stability,21 speed steps were selected between 10000 rpm and 52000 rpm to ensure both safety and accuracy.

Data acquisition began after the rotor operated stably for 30 seconds at each speed.After the rotor operated steadily under no base excitation for a period of time, base excitation was applied to the turbocharger rotor and then removed after a certain duration. The base excitation frequency was set to 60 Hz, and the amplitude a was varied to 0.3,1, and 2, respectively. The vibration of the compressor disk under three base excitation amplitudes was analyzed.Set a to 1, the base excitation frequency fe was varied to 40,60, and 80 Hz, respectively.