| 摘要 |
<p>A sealing device for dust- and liquid-aspirating machines, comprising an electric motor (11) provided with a shaft (12), to a cantilevered free end (14) whereof an axial suction impeller (15) is fixed, the impeller (15) being contained in a casing (16) wherein one or more delivery ducts (17) are formed peripherally. The device further comprises an axially perforated disk-shaped element (18) associated with the shaft (12), interposed between the motor (11) and the casing (16), and having a perimetric surface shaped so as to form at least two successive tapering regions (25,28) between which a change in diameter is interposed and forms a step (20), the configuration of the disk-shaped element (18) being adapted to repel the liquid by centrifugal action and to dissipate its energy in association with the facing surface of a flanged sealing element (21) having a hollow section (22) that encapsulates part of the electric motor (11), and a flange (23) connected to the casing (16) upon assembly. <IMAGE></p> |
