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JP2004518920A |
A roll for guiding at least one yarn in a yarn processing operation and comprising a tubular roll sleeve which is mounted for free rotation on a support by a plurality of bearings. At least one of the bearings is constructed as a radiall...
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JP2004169798A |
To obtain a non-contact type bearing by using a ring magnet with a larger diameter and a ring magnet with a smaller diameter.The non-contact type bearing structure is so constituted that the ring magnet (3b) with a smaller diameter is pr...
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JP2004516429A |
A type of passive magnetic bearing that provides for both positive radial stiffness and significant levels of passive radial damping. Axial damping and axial forces can also be generated with minor modifications to the basic configuratio...
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JP3533014B2 |
PURPOSE: To provide a digital control method for a magnetic bearing support rotor and controller provided with decisive software for a control torque which safely and stably controls, even when a sampling cycle is longer than a cycle of ...
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JP2004150624A |
To provide a magnetic bearing device having a compact size and a highly accurate axial center.The magnetic bearing device comprises a rotary bearing 20 fixed to a rotating shaft 10 and a fixed bearing 30 supporting the rotary bearing 20 ...
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JP3530911B2 |
PURPOSE: To realize a wide variable speed range while avoiding resonance by additionally providing a stator with a winding having number of poles different from that of winding for driving a rotator thereby controlling the voltage and cu...
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JP2004132441A |
To provide a magnetic bearing device for holding a rotary shaft so as to make a fan stably rotatable even to a large load change.A control device 80 estimates the size of a load impressed on a magnetic bearing 50 by processing a current ...
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JP2004513277A |
A rotor (12) is mounted in a stator (14) with radial magnetic bearings (16, 19) and with an axial magnetic bearing (40) in a contactless manner. The axial magnetic bearing (40) produces an axial magnetic field with a magnet coil (40) and...
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JP2004132513A |
To provide a touchdown function without enlarging.A touchdown layer 5 formed of a non-magnetic solid lubrication material is formed on at least one side of the two opposite end faces in a radial direction of a salient pole 2b of a stator...
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JP2004132435A |
To eliminate complicatedness of an adjustment; and to reduce costs by providing a bearing device for dispensing with a fixed guide.A stage surface plate 6 is composed of a magnetic substance, and guide surfaces of sliders 12a to d are re...
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JP2004130620A |
To suppress image irregularities generated because of rattling between a bearing and a guide shaft while abrasion of the bearing is reduced, by detecting the rattling between the bearing and the guide shaft in a movement range of a carri...
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JP2004512473A |
A magnetic bearing includes at least one inner bearing part; at least one outer bearing part which surrounds the inner bearing part; at least one permanent magnet and at least one flux guiding element which is positioned axially in relat...
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JP3519771B2 |
PURPOSE: To enable driving a magnetic bearing instantaneously by regenerative power from a driving motor at the time of power outage with providing neither outage detection circuit nor changeover circuit. CONSTITUTION: A dc input is redu...
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JP2004116558A |
To prevent seizure even when temperature at a contact part between a raceway surface of a raceway member of a rolling bearing for protection and a rolling element is rapidly increased at touchdown.A ball 40 of ceramics is interposed betw...
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JP2004511997A |
At temperatures located in a cryogenic temperature range, nickel steel is used for components, which can be subjected to high levels of mechanical stress and which have ferromagnetic properties at these temperatures.
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JP2004510927A |
A microwheel having stators constructed on a wafer material forming an evacuated. cavity in which a rotor is levitating to lessen friction losses. A plurality of microwheels can be integrated to serve as energy storage and/or momentum co...
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JP2004510108A |
A magnetic bearing arrangement ( 1 ) for a motion element, having the following features: the magnetic bearing arrangement has a stator. The magnetic bearing arrangement has a passive magnetic bearing ( 3, 8, 9 ) for lateral guidance of ...
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JP3510455B2 |
To provide a magnetic bearing device to generate a floating force through combination of a first magnetic repulsion force generated between a second kind superconductor and a first permanent magnet, and a second magnetic repulsion force ...
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JP2004507068A |
A device ( 1 ) for treating objects, in particular silicon wafers ( 2 ), with a fluid ( 3 ), comprising a container ( 4 ) that holds the fluid ( 3 ); a rotatable carrying arrangement ( 5 ) for accommodation of the objects to be treated, ...
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JP2004063171A |
To provide a rotating anode X-ray tube apparatus firmly fixing an anode side repeatedly rotating at high speed by receiving high-heat cycles to a tube vessel side.A bearing housing 21 welded to an X-ray tube envelope 22 via a metallic se...
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JP2004059195A |
To drive a spherical body supporting an article from the spherical body side to carry it.A large main ball 2 is rotatably supported on a concave surface 10 provided in a body 4 through a number of small balls 3, and a lid part 12 to clos...
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JP3497562B2 |
PURPOSE: To find and excellent compromise point between loss in a circuit and dynamic performance requested to it by keeping a fixed ratio between a force command from a correction circuit network and force as a result along a predetermi...
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JP3490074B2 |
To provide a magnetic bearing device capable of enhancing an abrasion-resistance strength and a seizure-resistance of a raceway surface of a touch-down bearing and a circumference surface at a touch-down side and rotatably supporting a r...
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JP2004502109A |
The invention concerns a contact roller bearing for a vacuum pump comprising a rotor roller bearing ring (12) a coaxial stator roller bearing ring (13) between which are provided rolling elements (14a, 14b, 14c, 14d) housed in succession...
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JP3474852B2 |
The invention relates to a method for generating over-pressure gas by means of a kinetic compressor which is coupled to a high-speed electric machine located on the same shaft with the compressor and comprising a rotor whose rotational s...
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JP3470210B2 |
PURPOSE: To prolong the lives of the touch down bearings of a motor by supplying desired power to magnetic bearing means over a comparatively long time, until the number of revolution of the rotor lowers sufficiently at the stopping time...
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JP2003533684A |
In a rotary assembly comprising a rotor mounted in rotation in a stator about a mean axis or rotation, a radial position sensor comprises three induction sensors distributed in the stator substantially at 120° from one another around th...
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JP2003532838A |
A magnetic bearing for rapidly rotating machines (1), in particular, for turbo compressors, drag vacuum pumps, or similar, includes two bearings (3, 4), each with a stator magnetic-ring set (5, 7) and a rotor magnetic-ring set (6, 8). Mo...
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JP3463218B2 |
PURPOSE: To enhance bearing rigidity by advancing the phase in the vicinity of a stationary revolution. CONSTITUTION: The magnetic bearing device is equipped with a radial magnetic bearing 3 having a plurality of electromagnets 2 which s...
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JP2003302418A |
To provide an anemoscope and an aerovane having a rotatable wind direction shaft erected freely rotatably on a fixed stand through a bearing which can easily start to rotate even with a low wind speed by reducing a vertical load imposed ...
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JP3459443B2 |
PURPOSE: To diminish or eliminate the known bearing problems in a power recovery plant comprising a gas turbine with a turbine wheel and a generator with a rotor driven by the turbine wheel. CONSTITUTION: A turbine 12 and a generator 14 ...
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JP2003530484A |
The coating device for coating a metal band ( 12 ) in a melt ( 14 ) of a non-magnetic metal comprises a shaft ( 16 ) rotatable in the melt ( 14 ) for guiding the metal band ( 12 ). The shaft ( 16 ) is supported in a shaft bearing ( 26 1)...
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JP3450380B2 |
PURPOSE: To provide an axial electromagnetic bearing structure with a simple structure capable of making a rotor compact and minimizing a centrifugal stress applied to the rotor. CONSTITUTION: In the axial electromagnetic bearing 50, a r...
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JP2003527539A |
Rotor systems are provided comprising rotor, magnetic bearings and a magnetic bearing controller. The controller is one which varies in accordance with linear parameters and is preferably responsive to linear matrix inequalities. High sp...
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JP3444394B2 |
To improve maximum rotational speed by arranging a magnetic thrust bearing rotor which has a magnetic attraction member rotatable inside a gas turbine engine, and a high relative strength compound ring which resists against non-magnetic ...
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JP2003526026A |
The invention relates to a combined bearing and drive system, which consists of a permanently excited magnetic support system comprising at least one stationary and at least one mobile magnet bar, where pairs of opposite stationary and m...
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JP3439292B2 |
To provide dynamic pressure gas bearing structure simplifying the outer peripheral surface shape of a shaft of a rotation driving part so as to be rotatable stably at high speed, and provide a light deflection scanning device provided wi...
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JP2003222124A |
To provide a means for preventing wear resulting from contact sliding movement of a thrust dynamic pressure bearing surface at the time a spindle motor starts.There are provided a column 4 of a radial dynamic pressure bearing having a ra...
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JP3429306B2 |
PCT No. PCT/SE92/00767 Sec. 371 Date Apr. 12, 1994 Sec. 102(e) Date Apr. 12, 1994 PCT Filed Nov. 5, 1992 PCT Pub. No. WO93/10333 PCT Pub. Date May 27, 1993.In a rotary screw machine, a shaft journal (7) of one of the rotors (6) is mounte...
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JP3425475B2 |
PURPOSE: To provide a magnetic bearing device which is capable of also suppressing displacement of a component except the primary component of the frequency of a rotary body. CONSTITUTION: Through feedback control of the exciting current...
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JP3421904B2 |
To prevent oscillation of a spindle and slipping-out of a tool or the like when rotating the spindle in a condition where the tool is not installed on the spindle and a condition where the tool is incompletely installed while supporting ...
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JP3421903B2 |
To perform machining by each tool always under proper conditions by providing a control characteristic switching means for switching the control characteristic of a magnetic bearing based on a measure tool weight. A weight of a spindle 5...
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JP3419759B2 |
A rotary pump (PP) for taking in a liquid such as a hydrocarbon comprises a pump wheel (1) secured to a rotor (4) which is immersed in a portion of the liquid taken in by the pump. A motor (11) having a stator element (111) mounted in a ...
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JP3418997B2 |
PURPOSE: To prevent the mutual interference between the control systems for translational motion and rotational motion by constituting rotary shaft position control systems at every degree of freedom of translating motion and rotational ...
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JP2003164950A |
To extend the life of a shaft by enabling it to simultaneously withstand both thrust loading and radial loading in a small-diameter guide roll for a piece of cast.The structure of a shaft is that the shaft is fitted between a shaft hole ...
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JP3414918B2 |
To make a shock received by a rotary shaft and a touch down bearing very much small at the time of touch down by cutting power to a rotary machine according to the magnitude of the detected runout of the rotary shaft and cutting current ...
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JP2003161289A |
To provide a specified structure which serves to reduce the acceleration resistance of a landing bearing as much as possible and also provide sufficient durability to chemical corrosion by process gas and plasma used in the manufacturing...
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JP3403730B2 |
PCT No. PCT/DE93/00451 Sec. 371 Date Nov. 21, 1994 Sec. 102(e) Date Nov. 21, 1994 PCT Filed May 19, 1993 PCT Pub. No. WO93/23683 PCT Pub. Date Nov. 25, 1993In order to stabilize a body born contactlessly in the magnetic field of a stator...
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JP2003120663A |
To provide a micro-bearing structure having an outer diameter of 5 mm or less by eliminating a ball bearing structure, and slidably incorporating two shaft plates fixed above and below a cylindrical housing via central holes by arranging...
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JP2003079095A |
To reliably prevent axial vibration by biasing the rotor toward a thrust bearing through a simple structure so that the rotor is settled on the thrust bearing.A rotor R having a driving magnet 3 and a rotor yoke 2 with the driving magnet...
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