Bearing assembly for underwater pump

The utility model relates to the technical field of underwater pumps, and provides a bearing assembly for an underwater pump, which comprises a rotating shaft arranged on a rack; the bearing body is provided with a lubricating liquid filling hole and a first hole, and the bearing body is rotationally arranged on the rotating shaft; the number of the spacer sleeves is two, the two spacer sleeves are arranged on the two sides of the bearing body respectively, the two spacer sleeves are provided with first cavities and second cavities, the first cavities are communicated with the bearing body, the second cavities are communicated with the first cavities, and the spacer sleeves are arranged on the rotating shaft; the sealing device comprises a first cavity, a second cavity and a small-diameter sealing ring arranged in the first cavity, and is characterized by further comprising a large-diameter sealing ring arranged in the second cavity, and the large-diameter sealing ring and the small-diameter sealing ring are