Experimental device for measuring rotational inertia of rigid body by using superconducting magnetic suspension

The utility model discloses an experimental device for measuring the rotational inertia of a rigid body by using superconducting magnetic suspension. The existing experimental device has larger friction force and larger measurement error during measurement. The device comprises a suspension generating device, a rotation measuring device and a pulling device. A tray is horizontally and fixedly arranged in a container of the suspension generating device, an yttrium barium copper oxide wafer is arranged in a round through hole of the tray, and liquid nitrogen is contained in the container. The rotary measuring device is arranged above the magnetic suspension generating device and comprises a neodymium ferromagnetic disc, a winding shaft and a photoelectric door; the neodymium ferromagnetic disc is horizontally arranged, and the winding shaft is arranged below the neodymium ferromagnetic disc. The pulling device comprises two fixed pulleys arranged on the two sides of the container, and a pull rope wound around a