Low energy consumption air pressure sealing device

The utility model discloses a low energy consumption air pressure sealing device, which comprises a shaft sleeve (1), fans and fan covers, wherein the fan covers are arranged outside the fans, the fans are arranged on shaft sleeves (1), two groups of fans are arranged, and respectively are front fans (2) and rear fans (3), fan blades arranged on the front fans (2) and the rear fans (3) are symmetrically arranged around axle centers of the shaft sleeves (1), and the radiuses of the fan blades of the front fans (2) are smaller than the radiuses of the fan blades of the rear fans (3). The fan covers are arranged on a side part of a centrifugal fan shell needing to be sealed by arranging the fans on the shaft sleeves and being arranged outside the fans when working, the shaft sleeves are arranged on a centrifugal fan shaft, when the centrifugal fan shaft rotates, air pressure produced by the fans are offset with the pressure, and the dust in a centrifugal fan can not leak outwardly. The low energy consumption air