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公开(公告)号：US06447271B2
公开(公告)日：2002-09-10
申请号：US09732739
申请日：2000-12-11
申请人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
发明人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
IPC分类号： F04B3504
CPC分类号： F04C28/08 , F04C29/0085 , H02K16/02 , H02K21/16 , H02K29/03
摘要： A multishaft electric motor has a plurality of juxtaposed rotors having respective permanent magnets disposed therearound, and a plurality of sets of armature elements disposed fully circumferentially around the rotors, respectively, the permanent magnets of adjacent two of the rotors having a plurality of pairs of unlike magnetic poles for magnetically coupling the rotors through the armature elements between the permanent magnets. A positive-displacement vacuum pump includes a casing, a pair of pump rotors rotatably disposed in the casing in confronting relation to each other, and a two-shaft electric motor coupled to the pump rotors for rotating the pump rotors in opposite directions. The two-shaft electric motor may comprise a pair of juxtaposed rotors and a pair of sets of armature elements disposed fully circumferentially around the rotors, respectively.
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公开(公告)号：US06183218B2
公开(公告)日：2001-02-06
申请号：US09127123
申请日：1998-07-30
申请人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
发明人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
IPC分类号： F04B3504
CPC分类号： F04C28/08 , F04C29/0085 , H02K16/02 , H02K21/16 , H02K29/03
摘要： A multishaft electric motor has a plurality of juxtaposed rotors having respective permanent magnets disposed therearound, and a plurality of sets of armature elements disposed fully circumferentially around the rotors, respectively, the permanent magnets of adjacent two of the rotors having a plurality of pairs of unlike magnetic poles for magnetically coupling the rotors through the armature elements between the permanent magnets. A positive-displacement vacuum pump includes a casing, a pair of pump rotors rotatably disposed in the casing in confronting relation to each other, and a two-shaft electric motor coupled to the pump rotors for rotating the pump rotors in opposite directions. The two-shaft electric motor may comprise a pair of juxtaposed rotors and a pair of sets of armature elements disposed fully circumferentially around the rotors, respectively.
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公开(公告)号：US5779453A
公开(公告)日：1998-07-14
申请号：US778499
申请日：1997-01-03
申请人： Masami Nagayama , Katsuaki Usui , Kozo Matake , Yoshinori Ojima , Genichi Sato , Yasushi Hisabe
发明人： Masami Nagayama , Katsuaki Usui , Kozo Matake , Yoshinori Ojima , Genichi Sato , Yasushi Hisabe
IPC分类号： F04C29/00 , F04C29/04 , H02K1/27 , H02K5/128 , H02K5/20 , H02K5/24 , H02K9/19 , H02K9/22 , H02K11/04 , H02K16/02 , F04B35/04 , F04B53/08
CPC分类号： H02K1/278 , F04C29/0085 , F04C29/045 , H02K1/02 , H02K11/33 , H02K15/03 , H02K16/02 , H02K5/128 , F04C2240/402 , H02K5/20 , H02K5/24 , H02K9/19 , H02K9/22
摘要： A vacuum pump has a pump casing having a suction side where a suction port is located and a discharge side where a discharge port is located, a pump assembly housed in the pump casing and comprising a pair of pump rotors rotatable in synchronism with each other and having respective shafts, and a brushless direct-current motor mounted on the pump casing at a suction side of the pump casing. The motor has a pair of motor rotors comprising respective sets of permanent magnets which are mounted respectively on the shafts, a pair of cans surrounding outer circumferential and end surfaces of the motor rotors in sealing relation to the pump assembly, a motor stator mounted on the cans and housed in a water-cooled motor frame.
摘要翻译： 真空泵具有泵壳体，其具有吸入口所在的吸入侧和排出口所在的排出侧，泵组件容纳在泵壳体中并且包括可以彼此同步旋转的一对泵转子， 具有各自的轴，以及安装在泵壳体上的无刷直流电动机的泵壳的吸入侧。 电动机具有一对电动机转子，其包括分别安装在轴上的各组永磁体，一对围绕电动机转子的外周和端表面的与泵组件密封的一对罐，安装在该组件上的电动机定子 罐头并安装在水冷电机框架中。
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公开(公告)号：US5710470A
公开(公告)日：1998-01-20
申请号：US476907
申请日：1995-06-07
IPC分类号： F16C17/02 , F16C17/04 , F16C17/10 , F16C32/00 , F16C32/04 , F16C33/10 , F16C39/06 , G02B26/12 , H02K7/09
CPC分类号： F16C33/107 , F16C17/10 , F16C39/063 , G02B26/121
摘要： A hydrodynamic bearing assembly includes a support shaft provided on a stationary member, a rotating member rotatably supported on the support shaft through a hydrodynamic radial bearing and a hydrodynamic thrust bearing, a magnet provided at a stationary side, and a magnetic member provided on the rotating member opposite the magnet. The magnetic member is attracted by the magnetic force from the magnet so that a force acting on the thrust hydrodynamic bearing is cancelled or reduced.
摘要翻译： 一种流体动力轴承组件包括设置在固定构件上的支撑轴，通过流体动力学径向轴承和流体动力推力轴承可旋转地支撑在支撑轴上的旋转构件，设置在固定侧的磁体和设置在旋转的 磁铁对面的部件。 磁性构件被来自磁体的磁力吸引，使得作用在推力流体动力轴承上的力被抵消或减小。
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公开(公告)号：US5814913A
公开(公告)日：1998-09-29
申请号：US425872
申请日：1995-04-20
申请人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
发明人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
IPC分类号： F04C28/08 , F04C29/00 , H02K16/02 , H02K21/16 , H02K29/00 , H02K7/20 , H02K17/44 , H02K19/38
CPC分类号： F04C28/08 , F04C29/0085 , H02K16/02 , H02K21/16 , H02K29/03
摘要： A multishaft electric motor has a plurality of juxtaposed rotors having respective permanent magnets disposed therearound, and a plurality of sets of armature elements disposed fully circumferentially around the rotors, respectively, the permanent magnets of adjacent two of the rotors having a plurality of pairs of unlike magnetic poles for magnetically coupling the rotors through the armature elements between the permanent magnets. A positive-displacement vacuum pump includes a casing, a pair of pump rotors rotatably disposed in the casing in confronting relation to each other, and a two-shaft electric motor coupled to the pump rotors for rotating the pump rotors in opposite directions. The two-shaft electric motor may comprise a pair of juxtaposed rotors and a pair of sets of armature elements disposed fully circumferentially around the rotors, respectively.
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公开(公告)号：US4984881A
公开(公告)日：1991-01-15
申请号：US452935
申请日：1989-12-19
CPC分类号： F16C25/045 , G02B26/121 , G02B7/1821
摘要： A rotation supporting device of a polygon mirror comprising a stationary shaft provided with a shaft sleeve around its circumference, a rotary assembly rotatably mounted around the circumference of the shaft sleeve and having a radial circumferential surface of a polygon made to serve as mirror surfaces and having a magnet member, thrust plates for suppressing the motion of a rotary assembly in the axial direction. The rotary assembly comprises a first rotor rotatably mounted at the outer circumference of the shaft sleeve, a second rotor having a circumferential surface of a polygon made to serve as mirror surfaces and being disposed at the outer circumference of the first rotor, and a yoke secured on the outer circumference of the first rotor. The first rotor is made of a ceramic material, the second rotor is made of aluminum and the yoke is made of steel. Radial dynamic pressure bearing is included between the outer circumference of the shaft sleeve and the rotary assembly. Dynamic thrust pressure bearings are included between the end surfaces of a rotary assembly and the thrust plates.
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7.发明授权公开(公告)号：US06761542B2
公开(公告)日：2004-07-13
申请号：US10195454
申请日：2002-07-16
申请人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
发明人： Yoshinori Ojima , Kozo Matake , Genichi Sato , Yasushi Hisabe , Masami Nagayama , Katsuaki Usui , Hiroaki Ogamino
IPC分类号： F04B3504
CPC分类号： F04C28/08 , F04C29/0085 , H02K16/02 , H02K21/16 , H02K29/03
摘要： A multishaft electric motor has a plurality of juxtaposed rotors having respective permanent magnets disposed therearound, and a plurality of sets of armature elements disposed fully circumferentially around the rotors, respectively, the permanent magnets of adjacent two of the rotors having a plurality of pairs of unlike magnetic poles for magnetically coupling the rotors through the armature elements between the permanent magnets. A positive-displacement vacuum pump includes a casing, a pair of pump rotors rotatably disposed in the casing in confronting relation to each other, and a two-shaft electric motor coupled to the pump rotors for rotating the pump rotors in opposite directions. The two-shaft electric motor may comprise a pair of juxtaposed rotors and a pair of sets of armature elements disposed fully circumferentially around the rotors, respectively.
摘要翻译： 多层电动机具有多个并置的转子，其具有设置在其周围的各自的永磁体，以及分别围绕转子完全周向设置的多组电枢元件，相邻两个转子的永磁体具有多对不同的 用于通过永磁体之间的电枢元件将转子磁耦合的磁极。 正排量真空泵包括壳体，一对可旋转地设置在壳体中的泵转子，彼此面对的关系;以及耦合到泵转子的用于沿相反方向旋转泵转子的双轴电动机。 双轴电动机可以包括一对并置的转子和分别围绕转子完全周向设置的一对电枢元件。
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公开(公告)号：US5846062A
公开(公告)日：1998-12-08
申请号：US867047
申请日：1997-06-02
IPC分类号： F04C18/16 , F04C23/00 , F04C25/02 , F04C29/00 , H02K16/00 , F04B17/00 , F01C11/00 , F04C2/00 , F04C11/00
CPC分类号： F04C23/001 , F04C18/16 , F04C29/0085 , F04C2220/12 , F04C2240/51
摘要： A screw type dry vacuum pump having dual shafts is disclosed, whereby the process gas is transported through three compartments, a gas admittance pump section, a central drive motor section, and a gas discharge pump section. By placing the drive motor in the center of the pump, it becomes possible to design a pump having the dual shafts supported only at one end, thus enabling to mount the rotors at the free ends of the pump which are closed with end plates which can be removed easily for servicing the pump sections. Synchronous operation of the dual shaft pump by magnetic coupling enables to lower power consumption and to extend the range of operable pressures.
摘要翻译： 公开了一种具有双轴的螺杆式干式真空泵，由此将工艺气体输送通过三个隔室，气体导纳泵部分，中央驱动电机部分和排气泵部分。 通过将驱动电动机放置在泵的中心，可以设计具有仅在一端支撑的双轴的泵，从而能够将转子安装在泵的自由端，该端部可以用端板封闭， 易于拆卸以便维修泵段。 通过磁耦合同步操作双轴泵，可以降低功耗并扩大可操作压力的范围。
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公开(公告)号：US4998033A
公开(公告)日：1991-03-05
申请号：US506183
申请日：1990-04-09
申请人： Yasushi Hisabe , Noriyuki Osada , Toshihiro Ohtani , Masahiko Kishi , Yoshio Sato , Daisuke Konno , Sachihiko Miwa , Toshiya Kanamori , Shunichi Aiyoshizawa , Kazuyuki Kasahara , Kazuto Hirokawa , Yumiko Noda
发明人： Yasushi Hisabe , Noriyuki Osada , Toshihiro Ohtani , Masahiko Kishi , Yoshio Sato , Daisuke Konno , Sachihiko Miwa , Toshiya Kanamori , Shunichi Aiyoshizawa , Kazuyuki Kasahara , Kazuto Hirokawa , Yumiko Noda
CPC分类号： F16C17/107 , F16C25/045 , F16C27/08 , G11B19/2009 , H02K5/1677 , F16C2206/40 , F16C2370/12 , F16C27/063
摘要： A spindle motor comprising a stator including a support shaft positioned on a base, a cap-shaped rotor rotatably and concentrically disposed around the support shaft, thrust and radial bearings disposed between the stator and the rotor, a stator coil secured to the stator, and a rotor magnet member secured to the rotor opposing the stator coil. The thrust and radial bearings are hydrodynamic bearings. A movable piece that constitutes a part of the thrust bearing is secured to the lower end of a cylindrical portion of the rotor and extended outwardly or inwardly from the cylindrical portion, or is disposed above the rotor. The stator coil is secured to the outer peripheral portion of the support shaft above or below the radial bearing. The rotor magnet member is securd to the inner peripheral surface or inner top surface of the rotor. Either a radial or axial gap is provided between the stator coil and the rotor magnet member.
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