Patent ID: 6565315
Filing Date: 2003-05-20
Classification: F04D

Abstract:
A rotation device, comprising:(a) a housing with a central, substantially axial first medium passage and at least one substantially axial second medium passage; (b) a rotor shaft which extends in this housing and outside of this housing and which is mounted for rotation relative to this housing and supports a rotor accommodated in this housing, which rotor connects with a central third medium passage to said first medium passage, which third medium passage branches into a plurality of angularly equidistant rotor channels which each extend in a respectively generally radial main plane from the third medium passage to a respective fourth medium passage, wherein the end zone of the third medium passage and the end zone of the fourth medium passage each extend substantially axially and each rotor channel has a curved form with a middle part which extends in a direction having at least a considerable radial component, and each rotor channel has a flow tube cross-sectional surface which increases in the direction from the third medium passage to the fourth medium passage from a relative value of 1 to a relative value of at least 4; (c) a stator accommodated in this housing and comprising: (c.1) a first central body which has a substantially rotation-symmetrical outer surface with a smooth form which together with an inner surface of the housing bounds a generally substantially rotation-symmetrical medium passage space with a radial dimension of a maximum of 0.4 times the radius of said outer surface, in which medium passage space are accommodated a plurality of angularly equidistant stator blades which in pairs bound stator channels and which stator blades each have on their end zone directed toward the rotor and forming a fifth medium passage a direction differing substantially, in particular at least 60Â°, from the axial direction, and on their other end zone forming a sixth medium passage a direction differing little, in particular a maximum of 15Â°, from the axial direction; which fifth medium passages connect onto the fourth medium passages for medium flow in substantially axial direction and are placed at substantially the same radial positions, and which sixth medium passages connect onto the at least one second medium passage; (c.2) a second central body, wherein between the sixth medium passage and the at least one second medium passage a plurality of manifold channels extend tapering in the direction from the sixth medium passages to the at least one second medium passage and bounded by the outer surface of the second central body and the cylindrical inner surface of the housing; wherein a general medium through-flow path is defined between the first medium passage and the at least one second medium passage through respectively the first medium passage, the third medium passages, the rotor channels, the fourth medium passages, the stator channels, the sixth medium passages, the manifold channels, the second medium passages, and the vice versa, with substantially smooth and continuous transitions between parts during operation; and wherein the structure is such that during operation there is a mutual force coupling between the rotation of the rotor, and thus the rotation of the shaft and the pressure in the medium flowing through said medium through-flow path.