Sealing device and oil-steam combined sealing device

The invention discloses a sealing device, which comprises an oil slinger and also comprises an oil seal ring, wherein a plurality of groups of first sealing teeth distributed along the axial direction are arranged on the inner ring surface of the oil seal ring, and the groups of first sealing teeth and the outer ring surface of the oil slinger form axial sealing in a matching way; and/or a plurality of groups of second sealing teeth distributed along the radial direction are arranged on the side surface of the oil sealing ring, and the groups of second sealing teeth and the side surface of at least one oil blocking tooth of the oil slinger form radial sealing in a matching way. According to the invention, the first sealing teeth in the oil sealing ring can provide axial sealing, the second sealing teeth in the oil sealing ring can provide radial sealing, and the axial sealing and the radial sealing can improve the sealing effect of lubrication oil. In addition, the first sealing teeth and the second sealing teeth on the oil sealing ring can also play a role of steam sealing to prevent high-pressure steam from permeating into the lubrication oil, so as to ensure the lubrication effect of the lubrication oil. The invention also discloses an oil-steam combined sealing device provided with the sealing device.