Abstract:
The present invention relates to spiral groove bearings. In order to provide a spiral groove bearing with enhanced efficiency, for example with reduced weight and increase of load bearing capacity at nominal operation frequency, a spiral groove bearing arrangement (10) for rotatably supporting a rotating arrangement is provided that comprises a first sub-bearing (12), at least a second sub-bearing (14), and a coupling device (16). The first sub-bearing is a main spiral groove bearing (18) configured to carry a load of the rotating arrangement at a nominal operation frequency range, and the second sub-bearing is an auxiliary bearing (24) configured to carry the load of the rotating arrangement from starting and landing to the nominal operation frequency range. The coupling device is configured to couple the first sub-bearing and the second sub-bearing in a frequency range from starting and landing to the operation frequency range. Further, the coupling device is also configured to de-couple the second sub-bearing at the nominal operation frequency.
Abstract:
A turbine generator comprises an elongate member, a support structure, a turbine wheel and an electrical generator. The support structure comprises a shaft and supports the elongate member for rotation about a rotation axis. The turbine wheel attached to the elongate member. The electrical generator comprises a rotor and a stator, the rotor being attached to the elongate member and the stator being arranged around the elongate member. The elongate member is provided with a bore and the shaft extends through an end of the elongate member into the bore so as to support it for rotation about the rotation axis.
Abstract:
The method of levitation, centering, stabilization and driving of single electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive, which is movable and rotatable in stator (1) of radial electromagnetic bearing through acting of components of magnetic flux, which based on monitoring the position and/or speed and/or acceleration of rotation of electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive induce forces acting upon electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive in axial and/or radial and/or tangential direction. On the electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive being common for radial electromagnetic bearing and electrical rotation drive simultaneously acts stabilizing magnetic flux and driving magnetic flux from separate sources of the magnetic flux. The invention further relates to the electromagnetic bearing and driving system and the spinning mechanism of the rotor spinning machine.
Abstract:
Die Erfindung betrifft ein Wälzlager (1 ) mit einer Dichtungsanordnung (6) und einem einen Befestigungsflansch (11) aufweisenden Sensorbauteil (12), insbesondere einem Encoder, wobei das Wälzlager (1 ) einen Innenring (2) sowie einen Außenring (3) aufweist, zwischen denen Wälzkörper (5) angeordnet sind, und bei dem die Dichtungsanordnung (6) mit wenigstens einem Dichtungselement (7, 8) zwischen Innenring (2) und Außenring (3) versehen ist. Um ein Wälzlager zu schaffen, das einen einfachen Umbau mit einem Umbau-Sensor, insbesondere einem Umbau-Encoder, erlaubt und das gut gegen Umwelteinflüsse geschützt ist, ist gemäß der Erfindung vorgesehen, dass das den Befestigungsflansch (11 ) aufweisende Sensorbauteil (12) als Umbauteil ausgebildet ist, und dass zumindest eine Wasserablauföffnung (13, 18, 19) im Bereich des Befestigungsflansches (11 ) angeordnet ist.
Abstract:
The method of levitation, centering, stabilization and driving of single electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive, which is movable and rotatable in stator (1) of radial electromagnetic bearing through acting of components of magnetic flux, which based on monitoring the position and/or speed and/or acceleration of rotation of electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive induce forces acting upon electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive in axial and/or radial and/or tangential direction. On the electromagnetic functional part of radial electromagnetic bearing and electrical rotation drive being common for radial electromagnetic bearing and electrical rotation drive simultaneously acts stabilizing magnetic flux and driving magnetic flux from separate sources of the magnetic flux. The invention further relates to the electromagnetic bearing and driving system and the spinning mechanism of the rotor spinning machine.
Abstract:
Die vorliegende Erfindung schlägt ein Magnetlager aufweisend einen Innenring und einen konzentrisch zum Innenring angeordneten Außenring vor, wobei der Innenring und der Außenring mittels Axial- und Radialmagneten drehbar zueinander gelagert sind, dadurch gekennzeichnet, dass das Magnetlager ein Fanglager aufweist, welches sowohl entlang einer axialen Richtung als auch entlang einer radialen Richtung in den Außenring und/oder den Innenring integriert ist.
Abstract:
A turbine generator comprises an elongate member, a support structure, a turbine wheel and an electrical generator. The support structure comprises a shaft and supports the elongate member for rotation about a rotation axis. The turbine wheel attached to the elongate member. The electrical generator comprises a rotor and a stator, the rotor being attached to the elongate member and the stator being arranged around the elongate member. The elongate member is provided with a bore and the shaft extends through an end of the elongate member into the bore so as to support it for rotation about the rotation axis.
Abstract:
A centrifugal (non-positive displacement) motor pump suitable for use in a small output area with extremely small water volume, rather simple in structure, and small in size, comprising a tubular motor stator (10), a motor rotor (20) having a permanent magnet (30), formed integral with an impeller (32), and disposed inside the motor stator (10), and a pump casing (44) fixed to the opening end part of a motor casing (12) so as to cover the impeller (32), wherein a dynamic pressure bearing (54) is formed between the front face of the impeller (32) and a spiral groove (52) provided in the internal surface of the pump casing (44) opposed to the front face of the impeller (32).
Abstract:
A radial sliding-contact bearing for rotary rolls has a cylindric fixed inner portion (2), a sleeve (4) rotatable thereon, and a gap (6) between the sleeve and the inner portion intended for a water film which in operation forms a rotary bearing for the sleeve. On its peripheral surface the inner portion has recesses (8') for facilitating an even distribution of the water over the surface of the inner portion (2) in operation. The water is fed to the gap (6) through first and second longitudinal rows of nozzle openings (14, 16) in the peripheral surface of the inner portion (2), which are connected to a common water supply channel (18) in the inner of the inner portion. As seen in the rotational direction of the sleeve, the nozzle openings, more particularly, end in the periphery of the inner portion before and behind, respectively, a longitudinal surface groove (8') in the upper side of the inner portion, said surface groove (8') serving for conveying on water coming from the first row of openings (14) and forming part of said recesses. The openings (16) in the second row, which is located before the area of the horizontal radial plane of the sleeve, have a water outlet direction (26) with a not unessential resultant in said rotational direction (24).