Patent ID: 9074608
Filing Date: 2015-07-07
Classification: F04D

Abstract:
1. 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 the housing and outside the housing and which is rotatably mounted relative to the housing and supports a rotor accommodated in the housing, which rotor branches with a central third medium passage into a number of angularly equidistant rotor channels, each extending in a respectively at least more or less flat main plane perpendicular to the rotation axis of the rotor 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 in a substantially axial direction and each rotor channel has a curved form, and has a middle part which extends in a direction with at least a considerable radial component, and each rotor channel has a flow tube cross-sectional area, which increases at least four-fold in the direction from the third medium passage to the fourth medium passage; (c) a stator accommodated in the housing, comprising: a first central body which has a substantially rotation-symmetrical, curved or hybrid formed outer surface with a smooth form which, together with an inner surface of the housing, bounds a at least one generally substantially rotation-symmetrical medium passage space with a radial dimension of a maximum of 0.4 times a radius of said outer surface; wherein said at least one medium passage space has, at a first end zone directed toward the rotor, at least one fifth medium passage and at a second end zone at least one sixth medium passage in a substantially axial direction; wherein said at least one fifth medium passage connects for medium flow in a substantially axial direction to the fourth medium passages and is placed at substantially the same radial positions, and which said at least one sixth medium passages is connected to the at least one second medium passage; a second central body connecting to the first central body, wherein between the sixth medium passage and the at least one second medium passage there extends at least one manifold channel extending in the direction from the sixth medium passages to the at least one second medium passage and bounded by an outer surface of the second central body and the inner surface of the housing; wherein a general medium throughflow 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 at least one fifth medium passages the at least one medium passage space, the at least one sixth medium passage, the at least one manifold channel, the at least one second medium passage, and vice versa, with substantially smooth and continuous transitions between said parts during operation; 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, on the one hand and the pressure in the medium flowing through said medium throughflow path; wherein the rotor comprises two rotation-symmetrical dishes, a first dish adjoining the first medium passage and a second dish disposed at a position remote from the first medium passage, wherein the two dishes, together with baffles also serving as spacers, bound the rotor channels, the axes of said dishes coinciding with the rotation axis of the rotor; wherein the dishes and the baffles consist of sheet material; and wherein the second dish is stiffened by stiffening means which comprise: a first stiffening plate extending in a plane perpendicular to the axis of the rotor, which stiffening plate is connected in a tensively strong manner on one side to the rotor shaft and on the other side to the outer peripheral edge of the second dish extending in at least a more or less axial direction; and a shoring structure connected on one side to the rotor shaft and on the other to a middle part of the second dish, this middle part extending with at least a considerable radial component; wherein, the first stiffening plate in its peripheral edge zone has an annular widening, of which the outer surface located radially furthest outward is connected rigidly to the inner surface of the second dish such that the stiffness of the peripheral edge of the dish is increased.