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JPH0874869A |
PURPOSE: To reduce the torque accompanying the slide of a rolling bearing and reduce the torque at the drive of the bearing. CONSTITUTION: A piezoelectric element 7 is mounted on the outer ring 3 of a tapered roller bearing 1 to apply an...
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JPH0861290A |
PURPOSE: To assure a safe operation of a friction pump at extreme requirements in a simple manner without requiring any additional constructional elements. CONSTITUTION: A friction pump is equipped with at least one actively controlled m...
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JPH0819938B2 |
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JPH0854019A |
PURPOSE: To eliminate necessity of a regenerative power source unit, and to control floating of a rotor associated with a magnetic bearing over an extremely wide range by using an amplifier and directly powering the switching amplifier b...
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JPH0814255A |
PURPOSE: To provide a low-cost bearing device resistant to high speed rotation by fitting a shaft to a sleeve, providing a herringbone groove for dynamic pressure generation on at least one of the shaft and the sleeve, and forming the sh...
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JPH08500168A |
Described is a stream turbine with a shaft (3) which, at least over part of its length, is located in a housing (4) through which it passes, one end of the housing (4) being the high-pressure end (10) and the opposite end the steam-exhau...
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JPH07336942A |
PURPOSE: To prevent rotor side from moving in thrust direction for stator side even if vibration or shock is applied without increasing the number of parts. CONSTITUTION: In the motor with a rotor part 100 and a stator part 200 for suppo...
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JPH07318842A |
PURPOSE: To improve the thrust bearing rigidity of a driving motor and to enhance the height position accuracy of a revolving sleeve. CONSTITUTION: A second permanent magnet 31 is mounted at the bottom end of the revolving sleeve 23 of t...
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JPH07317766A |
PURPOSE: To reduce a radius of a rotor and to stabilize its rotation by providing a coil slot formed inside of a yoke member, connected to a ring opening part and in which an electromagnetic coil is stored and forming width of an inlet o...
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JPH07314274A |
PURPOSE: To provide a contactless support device having a simple structure at low cost. CONSTITUTION: Electricity is supplied to a rotor 1 from a fixed current source 12 in parallel with coils 10 and 11 of at least two electromagnets 2 a...
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JPH07103894B2 |
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JPH07256503A |
PURPOSE: To provide a spindle apparatus capable of preventing a rotary shaft from bending vibration. CONSTITUTION: A magnetic bearing composite motor 52 having the magnetic bearing function for positional control by the magnetic force of...
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JPH07259850A |
PURPOSE: To improve low friction property by constituting a high precision axial and radial aerostatic and aerodynamic bearing for a motor having a rotor and a stator respectively with toroidal bearing surfaces. CONSTITUTION: A rotor 1 o...
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JPH07259855A |
PURPOSE: To reduce thrust force of a gas bearing turbine. CONSTITUTION: A pressure of balance chambers 4, 5, provided in an internal diametric side of a thrust bearing 6, is adjusted by adjusting valves 15, 16. A control signal is output...
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JPH0792361B2 |
The magnetic detection device comprises inductive elements, each one being constituted by a magnetic circuit the cross-section of which inside an axial plane is U-shaped, and a coil situated in a radial plane which constitutes a plane of...
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JPH07253116A |
PURPOSE: To obtain smooth and precise rotation over an extended series of start/stop cycles by providing a rotor and a stator with a first and a second magnets having polarity, and arranging the magnets to generate gravity drag to the ro...
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JPH0788849B2 |
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JPH0788850B2 |
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JPH0787681B2 |
PURPOSE:To enable fine machining by additionally providing a feedforward compensator for specifying a new target response to a known closed loop controller. CONSTITUTION:A lowpass filter 8, a high pass filter 9, a gain control 10, a diff...
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JPH0785639B2 |
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JPH0785638B2 |
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JPH0740098Y2 |
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JPH07238920A |
PURPOSE: To bear a part in upper direction force to an engine frame without maintaining the whole upper direction force applied on a main bearing upper metal by only an installation bolt and an installation nut so as to employ a small in...
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JPH0782025B2 |
Apparatus for providing a signal representative of armature displacement in a magnetic bearing assembly for a magnetic suspension system, of the type having a force sensor (34, 36) applied in a closed loop to provide a linear response wi...
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JPH07217653A |
PURPOSE: To provide a driven radial magnetic bearing forming a centering bearing having stabilized angle by separating a fixed element of a fitting part from a movable element thereof with a clearance, and separating a fixed element of a...
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JPH07207535A |
PURPOSE: To provide a spinning rotor which enhances running silence and suppresses the generation of heat in a rotational axis region. CONSTITUTION: A disk-shaped permanent magnet 7 and an annular permanent magnet 8 of an opposite polari...
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JPH0733569Y2 |
An electric machine comprises a stator 7 and a rotor 17 mounted on a rotor shaft 15. In order to preclude axial vibrations of the rotor shaft the machine is provided with a first magnet 19a incorporated in a thrust block 19 and a second ...
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JPH07194055A |
PURPOSE: To prevent the deviation of a rotor that is unallowed, especially reducing the risk of damages to the exit of a gas nozzle in a spinning rotor. CONSTITUTION: Concentric magnetic mechanisms 7, 8, 21, and 22 have a rotationally sy...
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JPH0767253B2 |
A turbo-generator has a tapering cooling part positioned between a vapor turbine part and a generator part, and casings of these parts are combined together to form a sealed single-boundary structure. A turbine shaft in the vapor turbine...
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JPH0765616B2 |
A bearing apparatus for a rotary machine having a horizontal rotating shaft comprises a bearing for supporting the horizontal rotating shaft, a bearing box for supporting the bearing therein, a lubricating oil tank disposed in a lower po...
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JPH0758535B2 |
A rotary head drum for a VCR using a fluid dynamic pressure bearing comprising a lower drum fixed to a base plate, a rotary shaft attached to the center of the lower drum, an upper drum fixed to a flange, a rotary head fixed to the upper...
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JPH07505205A |
Disclosed are devices for influencing and/or controlling relative motion between members, such as vibration damping or absorbing devices, clutches and brakes. The devices comprise a magnet on one member and a field cooled superconductor ...
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JPH0750016B2 |
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JPH07112366A |
PURPOSE: To perform reliable detection of only abnormal collision of a tool with a work. CONSTITUTION: A rotor shaft 3 to the tip of which a grinding wheel (tool) 6 is attached is supported by control type magnetic bearings 8 and 9 to ro...
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JPH0737812B2 |
A superconducting bearing device comprises an annular permanent magnet portion 2 disposed concentrically with a rotary body 1 in the form of a vertical shaft, and superconductors 8 opposed to the lower end face of the magnet portion 2 an...
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JPH0735811B2 |
The emergency bearing comprises a chrome steel rotor (2) mounted on the rotary axle (1), a graphite stator (3) mounted on the stand (5) opposite the rotor (2) but leaving a thickness of play less than the air-gap between the magnetic bea...
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JPH07103231A |
PURPOSE: To reduce a shock in a collision against an emergency bearing even when a rotary shaft cannot be supported by a magnetic bearing because of its disorder and falls down and to prevent the rotary shaft from being brought into cont...
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JPH0791447A |
PURPOSE: To provide such a superconductive magnetic bearing device as suppresses the occurrence of oscillation during drive of a rotary main shaft. CONSTITUTION: A superconduction magnetic bearing device comprising superconductors 1a and...
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JPH0783188A |
PURPOSE: To provide a magnetic suspension vacuum pump applicable to a turbo- molecular pump by disposing an active radial bearing to which plural position detectors in specified positions are coupled, and arranging the position detectors...
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JPH0720359B2 |
An apparatus for correcting imbalance of a rotor (100) suspended by a magnetic bearing system (109) including a displacement sensor (101) for detecting a displacement of the rotor (100). An imbalance correcting circuit applies an imbalan...
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JPH078879Y2 |
A turbo-molecular pump with passive, radial magnetic bearings and axial bearings has both direct and indirect damping arrangements for unwanted oscillations. Direct damping is produced by eddy currents produced in copper rings around the...
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JPH07501197A |
A flywheel having superconductor bearings has a lower drag to lift ratio that translates to an improvement of a factor of ten in the rotational decay rate. The lower drag results from the lower dissipation of melt-processed YBCO, improve...
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JPH0727140A |
PURPOSE: To shorten starting time of generators by reliably detecting formation of an oil film in a thrust bearing. CONSTITUTION: A control device is composed of a thrust collar 2 and thrust metal 3 to support a main shaft 4 connected di...
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JPH06346921A |
PURPOSE: To realize an optical scanning device having a reflecting mirror rotating at high speed and stably. CONSTITUTION: A bearing device 30 of an optical scanning device is constituted of permanent magnets 31a, 31b, electromagnets 32a...
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JPH06100225B2 |
A superconductive bearing device for supporting rotatably a shaft (rotor) (2) rotating at a high speed, under a non-contact state. A superconductive bearing (4) for supporting the shaft (2) under a non-contact state to a housing (1) incl...
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JPH0695818B2 |
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JPH0689778B2 |
A non-contact positioning device is composed of a driven body (1) formed by a magnetic substance which is the subject of positioning, and a driving body (3) constructed with electromagnets (5, 7, 9, 11, 13, 15, 17, 19) which support the ...
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JPH0680533B2 |
The apparatus comprises an objective (12) mounted in an objective holder (11) which is movable in accordance with a number of desired degrees of freedom by means of a bearing arrangement and comprises electromagnetic actuator means (83-6...
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JPH06280874A |
PURPOSE: To continue operation of a magnetic bearing device until the rotational frequency of a rotor is lowered enough in a device for continuing operation of a magnetic bearing device by utilizing the regenerative power of a motor at t...
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JPH0677368B2 |
The support and drive mechanism includes a cylindrical rotor (20) constituting a magnetic shield and a mechanical support for multiple hard discs (31) fixed on the external face (25) of the rotor. A fixed central shaft (1) supports the e...
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