公开(公告)号：US5108198A

公开(公告)日：1992-04-28

申请号：US553375

申请日：1990-07-17

申请人： Katsutoshi Nii ,  Kazuhiko Kawaike ,  Jun Matsubayashi ,  Satosi Uno

发明人： Katsutoshi Nii ,  Kazuhiko Kawaike ,  Jun Matsubayashi ,  Satosi Uno

IPC分类号： F16C32/04 ,  F16C33/10 ,  F16C33/82 ,  F16J15/40 ,  F16J15/43

CPC分类号： F16J15/43 ,  F16C33/1035 ,  F16C33/746

摘要： A sliding bearing an an end ring are mounted on a housing. A magnetic fluid sealing member comprises a permanent magnet and a magnetic fluid. A space is formed between the magnetic fluid sealing member and a lubricating fluid. A shaft has projection member or the end ring forms a spiral groove on an inner peripheral portion. The projection member of the shaft or the spiral groove of the end ring is disposed in an opposite position of the magnetic fluid sealing member. A magnetic fluid flow is disturbed by the projection member of the shaft or the spiral groove of the end ring according to a rotation of the shaft, then a magnetic fluid film is destructed instantaneously and the pressure at the space lowers. Air in the space is discharged from the housing. The scatter degree of the magnetic fluid is made slightly.

摘要翻译： 一个端环的滑动轴承安装在外壳上。 磁性流体密封构件包括永磁体和磁性流体。 在磁性流体密封构件和润滑流体之间形成空间。 轴具有突出构件或端环在内周部分上形成螺旋槽。 轴的突出构件或端环的螺旋槽设置在磁性流体密封构件的相对位置。 根据轴的旋转，磁流体流动被轴的突出构件或端环的螺旋槽扰动，然后瞬时破坏磁性流体膜并且空间中的压力降低。 空间中的空气从外壳排出。 磁性流体的散射度略微变小。

公开(公告)号：US5417507A

公开(公告)日：1995-05-23

申请号：US13353

申请日：1993-02-04

申请人： Satosi Uno ,  Jun Matsubayashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike

发明人： Satosi Uno ,  Jun Matsubayashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike

IPC分类号： F16C33/10 ,  F16C33/82 ,  G02B26/12 ,  H02K5/124 ,  H02K5/16 ,  H02K21/14 ,  H02K29/08 ,  F16C32/06

CPC分类号： H02K29/08 ,  F16C33/1035 ,  G02B26/121 ,  H02K5/124 ,  H02K5/1675 ,  H02K21/14

摘要： There is disclosed a polygon mirror motor in which an annular projection is formed on an upper surface of a rotor support member supporting a polygon mirror, and the annular projection supports a part of a lower surface of the polygon mirror. Radial bearings supporting a shaft of the motor have a plurality of oil grooves extending over about a half of the dimension of the radial bearing in a thrust direction. A magnetic fluid is filled in a space defined by the shaft, a support tube of a bearing support member and the radial bearings.

摘要翻译： 公开了一种多面镜电动机，其中在支撑多面镜的转子支撑构件的上表面上形成有环形突起，并且环形突起支撑多面镜的下表面的一部分。 支撑马达的轴的径向轴承具有在推力方向上延伸超过径向轴承的尺寸的大约一半的多个油槽。 磁性流体填充在由轴，轴承支撑构件的支撑管和径向轴承限定的空间中。

公开(公告)号：US5493161A

公开(公告)日：1996-02-20

申请号：US186166

申请日：1994-01-25

申请人： Satosi Uno ,  Sueo Akashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike ,  Hiroo Hiroyama ,  Kosho Ishizaki

发明人： Satosi Uno ,  Sueo Akashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike ,  Hiroo Hiroyama ,  Kosho Ishizaki

IPC分类号： F16C33/10 ,  F16C39/06 ,  H02K5/12 ,  H02K5/124 ,  H02K5/128 ,  H02K5/16 ,  H02K21/12 ,  H02K29/06 ,  H02K7/08 ,  H02K7/14 ,  H02K15/03

CPC分类号： H02K29/06 ,  F16C33/1035 ,  F16C39/063 ,  H02K21/12 ,  H02K5/12 ,  H02K5/124 ,  H02K5/128 ,  H02K5/1675 ,  F16C2370/22

摘要： A motor provided with a magnetic fluid bearing device for suppressing vibration and irregular rotation as well as preventing the magnetic fluid from being scattered from a bearing portion and the inside of the motor. The motor includes a rotor having a polygon mirror mounted thereon, a stator unit having driving coils, a rotor position detector and a rotor revolution detector attached thereto, a magnetic fluid bearing unit having a magnetic seal and a dynamic pressure seal attached thereto and a magnetic bearing. A triple seal structure for magnetic fluid which includes a first fluid seal constituted by the seals of the bearing unit, a second fluid seal constituted by a magnet of the rotor and a third fluid seal constituted by a magnet of the seal magnet is provided in the motor.

摘要翻译： 具有用于抑制振动和不规则旋转的磁性流体轴承装置的电动机以及防止磁性流体从电动机的轴承部分和内部散射。 电动机包括：安装有多面镜的转子，具有驱动线圈的定子单元，转子位置检测器和安装有转子旋转检测器的转子，具有磁性密封和附着于其上的动态压力密封的磁性流体轴承单元和磁性 轴承。 一种用于磁性流体的三重密封结构，其包括由轴承单元的密封件构成的第一流体密封件，由转子的磁体构成的第二流体密封件和由密封磁体的磁体构成的第三流体密封件 发动机。

公开(公告)号：US5325006A

公开(公告)日：1994-06-28

申请号：US692662

申请日：1991-04-29

申请人： Satosi Uno ,  Sueo Akashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike ,  Hiroo Hiroyama ,  Kosho Ishizaki

发明人： Satosi Uno ,  Sueo Akashi ,  Katsutoshi Nii ,  Kazuhiko Kawaike ,  Hiroo Hiroyama ,  Kosho Ishizaki

IPC分类号： F16C33/10 ,  F16C39/06 ,  H02K5/12 ,  H02K5/124 ,  H02K5/128 ,  H02K5/16 ,  H02K21/12 ,  H02K29/06 ,  H02K7/08 ,  H02K5/10 ,  H02K7/14

CPC分类号： H02K29/06 ,  F16C33/1035 ,  F16C39/063 ,  H02K21/12 ,  H02K5/12 ,  H02K5/124 ,  H02K5/128 ,  H02K5/1675 ,  F16C2370/22

摘要： A motor with a magnetic fluid bearing for suppressing vibration and irregular rotation as well as preventing the magnetic fluid from being scattered from a bearing portion in the inside of the motor. The motor includes a rotor having a polygon mirror mounted thereon, a stator unit having driving coils, a rotor position detector and a rotor revolution detector attached thereto, a magnetic fluid bearing unit having a magnetic seal and a dynamic pressure seal attached thereto and a magnetic bearing. A triple seal structure for magnetic fluid which includes a first fluid seal constituted by the seals of the bearing unit, a second fluid seal constituted by a magnet of the rotor and a third fluid seal constituted by a seal of the magnetic magnet is provided in the motor.

摘要翻译： 具有用于抑制振动和不规则旋转的磁性流体轴承的电动机以及防止磁性流体从电动机内侧的轴承部分散出。 电动机包括：安装有多面镜的转子，具有驱动线圈的定子单元，转子位置检测器和安装有转子旋转检测器的转子，具有磁性密封和附着于其上的动态压力密封的磁性流体轴承单元和磁性 轴承。 一种用于磁性流体的三重密封结构，包括由轴承单元的密封件构成的第一流体密封件，由转子的磁体构成的第二流体密封件和由磁体的密封件构成的第三流体密封件 发动机。

公开(公告)号：US5574322A

公开(公告)日：1996-11-12

申请号：US114176

申请日：1993-09-01

申请人： Katsutoshi Nii ,  Takeshi Nakajima ,  Ichiro Hashimoto ,  Satosi Uno ,  Sueo Akashi

发明人： Katsutoshi Nii ,  Takeshi Nakajima ,  Ichiro Hashimoto ,  Satosi Uno ,  Sueo Akashi

IPC分类号： H02K5/167 ,  G02B26/12 ,  G11B19/20 ,  H02K5/124 ,  H02K5/16 ,  H02K7/09

CPC分类号： F16C39/063 ,  F16C33/1035 ,  G02B26/121 ,  G11B19/20 ,  H02K5/124 ,  H02K5/163 ,  H02K7/09 ,  F16C2370/12

摘要： A motor has a rotor mounted on a stator to rotate about a rotation axis. The rotor is driven due to the interaction of a drive coil on the stator and a permanent magnet on the rotor. A magnetic thrust bearing, having permanent magnets on the stator and rotor, applies a radial thrust force. The radially outer surface of the permanent magnet on the rotor abuts a part of the rotor, so as to resist forces on the permanent magnet at high speed rotation or due to thermal deformation. The permanent magnets on the stator and the rotor may be axially offset by an offset of not more than 1/4 the axial length of the permanent magnets, or the axial length of the longer of the permanent magnets if they have different axial lengths. This generates an axial thrust at the thrust bearing, which counteracts the attractive force between the permanent magnet and the drive coil, and also the weight of the rotor.

摘要翻译： 电动机具有安装在定子上以绕旋转轴线旋转的转子。 转子由于定子上的驱动线圈和转子上的永磁体的相互作用而被驱动。 在定子和转子上具有永磁体的磁力推力轴承施加径向推力。 转子上的永磁体的径向外表面与转子的一部分相接触，以便在高速旋转或由于热变形时抵抗永磁体上的力。 定子和转子上的永磁体可以轴向偏移永磁体的轴向长度不超过+ E，1/4 + EE的偏移，或者永久磁铁的较长的轴向长度 具有不同的轴向长度。 这在推力轴承处产生轴向推力，其抵消永磁体和驱动线圈之间的吸引力以及抵抗转子的重量。