| 摘要 |
The baffles which are bounded by two end plates (311) and (331), optionally generate a flow in the axial direction, and take the form of blades (3) of a rotor immersed in a liquid (1) and driven by means of a shaft (2) create, along with the cover (12), a rotating liquid region (11) delimited in the radially outward direction by the stationary baffle (51) so as to form a cavity that is under reduced pressure and has an outer face (13) which is available for the vaporization process and is defined firstly by the equilibrium between the centrifugal force generated by the mass of the rotating liquid and the opposing force generated by the combination of the atmospheric pressure acting on the liquid from the outside and the pressure built up by the local immersion depth of the rotor, and secondly by the reduced pressure in the cavity. The vapour penetrating from the outer face (13) into the cavity is conducted outward as indicated by arrows (92) via radial channels (23) and the central channel (22) in the shaft (2) and is supplied, via a rotary seal and a line, to a condenser having a downstream vacuum pump. |
