Combined sealing device

The embodiment of the utility model relates to a sealing device and provides a combined sealing device comprising a plate-shaped columnar sealing base, wherein a sealing cavity is arranged in the sealing base and provided with a floating sealing ring for preventing soft fillers leaking from a gap of a shaft sleeve, an annular slot for positioning the floating sealing ring and a clamp ring for a hole are processed in the sealing cavity, the annular slot for radially sealing the floating sealing ring is processed at the inner diameter near to the sealing cavity, and an O-shaped ring is arranged on the annular slot; the shaft sleeve of an annular column is arranged at the inner diameter; a sealing bump is arranged at the outer diameter of the sealing cavity, a fixed bolt and a screw hole for the shaft sleeve and a shaft are arranged on the shaft sleeve, the annular slot is formed at the inner diameter, and an O-shaped sealing ring for sealing the shaft sleeve and the shaft is placed at the annular slot. When in