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公开(公告)号：US20210246945A1
公开(公告)日：2021-08-12
申请号：US17241136
申请日：2021-04-27
发明人： Johannes KREHER
IPC分类号： F16C32/04
摘要： A radial magnetic bearing includes an axis, a stator, and a rotor. The stator includes at least two stator assemblies axially spaced from one another. Each of the stator assemblies includes a magnetically soft core. At least one of the stator assemblies includes a magnetically soft core with several radially projecting teeth arranged distributed in a circumferential direction, and several coils likewise arranged distributed in the circumferential direction. Two respective teeth of the magnetically soft core that are successive in a circumferential direction are connected to each other by way of a connecting section of the core. A permanent magnet assembly is disposed axially between the two magnetically soft cores. The stator assembly is configured such that one of the respective connecting sections is wound with one of the respective coils. The permanent magnet assembly is part of the rotor.
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公开(公告)号：US11028503B2
公开(公告)日：2021-06-08
申请号：US16280402
申请日：2019-02-20
发明人： Markus Kuebler , Constantin Rieger
摘要： A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.
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公开(公告)号：US20210154783A1
公开(公告)日：2021-05-27
申请号：US17104077
申请日：2020-11-25
申请人： Yanshan University
发明人： Jianhua Zhao , Yongqiang Wang , Ziqi Wang , Dianrong Gao
摘要： The present invention provides a magnetic-hydraulic double-suspension bearing experiment table. In the experiment table, four blind holes are uniformly processed on left and right side surfaces of the two radial stators for magnetic-hydraulic double-suspension bearing; four countersunk through holes are uniformly processed on left side surfaces of the left supporting part of the fixed bracket and the right supporting part of the fixed bracket, and the radial stators for magnetic-hydraulic double-suspension bearing are fixedly connected to the upper end of the left supporting part of the fixed bracket by countersunk screws. In addition, the two radial stators for magnetic-hydraulic double-suspension bearing are processed with stops to ensure that the two radial stators for magnetic-hydraulic double-suspension bearing are concentric with the left supporting part of the fixed bracket and the right supporting part of the fixed bracket.
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公开(公告)号：US11009029B2
公开(公告)日：2021-05-18
申请号：US15781942
申请日：2016-12-08
发明人： Takashi Kabasawa
IPC分类号： F04D19/04 , F04D29/04 , F04D29/54 , F04D17/16 , F04D29/08 , F04D29/058 , F16C32/04 , F04D29/32
摘要： A reflection mechanism is disposed above a rotor blade. A chamfered surface of the rotor blade is formed to gradually open wide by 0 to 10 degrees toward the downstream side in the rotational direction, from an imaginary line passing through a rotational direction-side tip end point of a horizontal surface and drawn parallel to a rotating shaft. In the reflection mechanism, inclined plates, inclined at a predetermined angle, are arranged radially in the radial direction from a central disc portion. A particle reflected on the chamfered surface of the rotor blade collides with each inclined plate of the reflection mechanism and is then re-reflected and falls in the downstream direction. Since the particle can securely be reflected toward the reflection mechanism, the particle can be prevented from exiting through an inlet port to flow back toward a chamber.
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公开(公告)号：US11002283B2
公开(公告)日：2021-05-11
申请号：US16077390
申请日：2017-03-17
IPC分类号： H02K7/09 , H02K1/32 , F04D29/048 , F16C37/00 , F16C32/04 , F04D29/058 , F04D29/056 , F04D29/58 , F04D1/00 , F04D7/02
摘要： A magnetic bearing for a turbomachine includes a stator fixable to a structure of a turbomachine; a rotor magnetically coupled to the stator and defining a rotation axis, the rotor having a front central surface, a rear central surface opposite to the front central surface and an external surface with respect to the rotation axis; the rotor is provided with an internal channel configured to displace cooling fluid.
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公开(公告)号：US20210079792A1
公开(公告)日：2021-03-18
申请号：US16570366
申请日：2019-09-13
发明人： Guoxin Li
摘要： A system and method for controlling rotor dynamics at a rotor assembly is provided. The system includes a magnetic actuator and a controller. The magnetic actuator is positioned in magnetic communication with the rotor assembly and is configured to obtain a measurement vector corresponding to the rotor assembly and a measurement vector indicative of a rotor dynamics parameter. The magnetic actuator is further configured to selectively output an electromagnetic force at the rotor assembly. The controller is configured to store and execute instructions. The instructions include outputting, via the magnetic actuator, a baseline electromagnetic force to the rotor assembly; obtaining the measurement vector at the rotor assembly from the magnetic actuator; determining non-synchronous vibrations corresponding to the rotor assembly based at least on the measurement vector and a rotor speed of the rotor assembly; determining cross coupled stiffness corresponding to the rotor assembly based at least on the measurement vector, the rotor speed, and a predetermined rotor dynamics model of the rotor assembly; determining an adjusted electromagnetic force of the rotor assembly based at least on the cross coupled stiffness and a damping factor corresponding to the electromagnetic force output from the magnetic actuator; and generating an output signal corresponding to the adjusted electromagnetic force to the rotor assembly.
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公开(公告)号：US10947986B2
公开(公告)日：2021-03-16
申请号：US16032316
申请日：2018-07-11
发明人： Chen Chen
IPC分类号： F04D29/048 , A61M1/10 , F04D13/06 , F16C32/04 , H01F7/16 , H02K7/14 , H02K49/10 , H02K7/09 , H02K5/12
摘要： A centrifugal fluid pump with a fully magnetically suspended rotor to improve blood compatibility when pumping blood is disclosed. The pump stabilizes radial displacements of a disc-like rotor with active control through separate electric motor and magnetic bearings to improve the pump's critical performances including device packaging size, system simplicity and reliability, stiffness and other dynamic performances of suspension, power efficiency, and others.
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公开(公告)号：US20210062864A1
公开(公告)日：2021-03-04
申请号：US16551078
申请日：2019-08-26
摘要： A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.
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公开(公告)号：US10921108B2
公开(公告)日：2021-02-16
申请号：US16247309
申请日：2019-01-14
发明人： Joachim Denk , Bert-Uwe Köhler , Dietmar Stoiber , Frank Viering
摘要： In a method for monitoring a magnetic bearing device for an electric rotating machine, a first pair of at least essentially diametrically opposed sensors and a second pair of at least essentially diametrically opposed sensors are arranged in offset relation about an angle. A distance is determined between each of the sensors and a body of rotation arranged inside the first and second pairs of sensors. A first average distance is determined from distance values of the first pair of sensors and a second average distance is determined from distance values of the second pair of sensors. A first change in the first average distance is captured and a second change in the second average distance is captured. The first and second changes are compared and a warning signal is outputted when a difference between the first and second changes exceeds a limit value.
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公开(公告)号：US10895282B2
公开(公告)日：2021-01-19
申请号：US16325976
申请日：2016-08-18
发明人： Kazuya Hirata , Atsushi Sakawaki
摘要： A controller performs, in a first mode, a first operation for controlling composite electromagnetic force of electromagnets such that a target member moves within a predetermined moving range, and a second operation for acquiring temperature drift correlation information indicative of a correlation between a reference value and an input-output characteristic of a position sensor, based on the reference value and the input-output characteristic of the position sensor in the first operation. The controller performs, in a second mode, a third operation for controlling the composite electromagnetic force of the electromagnets according to a signal level of a detection signal from the position sensor, and a fourth operation for compensating the input-output characteristic of the position sensor in the third operation, based on the temperature drift correlation information and the reference value in the third operation.
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