Floating ring sealing device

The utility model relates to a floating ring sealing device, which comprises a sealing seat, a front baffle plate, a retainer ring and a floating ring component. The inner diameter of the floating ring component and the outer diameter of a rotor form a main sealing surface, the floating ring component clings to the sealing seat and the front baffle plate to form a secondary sealing surface, the floating ring component consists of a floating outer ring and a floating inner ring, the floating outer ring is made of a metal material, the floating inner ring is made of a C/C (carbon/carbon) composite material, and the outer diameter of the floating inner ring and the inner diameter of the floating outer ring form an integral floating ring structure by means of interference fit. In addition, a plurality of decompression grooves are peripherally arranged on the secondary sealing surface on two sides of the floating inner ring in the floating ring sealing device, and a plurality of sealing dams are formed at two radial ends of each decompression groove. The wear resistance of a sealing ring can be increased, the service life of a floating ring seal is prolonged, and performance reliability of the floating ring seal is improved. Besides, the sealing device is simple in structure, light in weight and easy in processing, and can be used for sealing various rotary shaft ends, or sealing devices can be combined to be used for sealing a bearing cavity.