Magnetic suspension shaft system protection bearing performance testing machine

The invention relates to a magnetic suspension shaft system protection bearing performance testing machine. The magnetic suspension shaft system protection bearing performance testing machine comprises a testing machine shell and a main body shaft system, a shaft system lining sleeves the main body shaft system, and the main body shaft system and the shaft system lining can oppositely rotate in the circumferential direction and are in up-and-down retaining cooperation; the shaft system lining is slidably assembled in the testing machine shell up and down in a guiding mode, a driving shaft is assembled at the upper end of the main body shaft system, a lifting device is arranged below, a to-be-tested bearing mounting part is arranged on the testing machine shell, and the bottom of the main body shaft system is provided with a shaft system testing section which is in supporting cooperation with a to-be-tested bearing after falling off. According to the testing machine, the main body shaftsystem is vertically jac