Closed centrifugal impeller with bilateral special-shaped notch structure

The utility model discloses a closed centrifugal impeller with a double-side special-shaped notch structure, which is characterized in that a wheel cover notch is formed in the edge of a wheel cover at an impeller air outlet between every two adjacent blades, and a wheel disc notch is formed in the edge of a wheel disc at the impeller air outlet between every two adjacent blades; the projection shape of the wheel cover notch on the wheel disc completely covers the shape of the wheel disc notch; the radial depth of the notch of the wheel cover is less than or equal to 18% of the radius of the impeller by taking the edge line of the wheel cover as a benchmark; with the edge line of the wheel disc as the reference, the radial depth of the wheel disc notch is smaller than or equal to 12% of the radius of the impeller. Through the structure, the mass of the closed centrifugal impeller is reduced, the rotational inertia is reduced, and the static stress level formed by the centrifugal load is low. The closed centri