Device for performing non-contact power transmission and earthing in computer tomography equipment

The present invention provides a device for performing non-contact power transmission between a fixed frame part (6) and a rotatable frame part (11) which can rotate an axis (9) in computer tomography equipment (1). The device comprises the following components: an annular conductive first supporting ring (12) which is configured on the rotatable frame part (11); and at least one first conductor component (13) which is configured in or above the first supporting ring (12) and is insulated from the first supporting ring (12) for obtaining electric power through a non-contact mode. The device further comprises at least one earthing slip ring (17) which is configured in or above the first supporting ring (12) and is in earthing connection with the first supporting ring (12). The device is advantageous in that mounting cost can be reduced through integrating an earthing system in the non-contact supporting ring. Besides, the supporting ring can be constructed through reduced space.