公开(公告)号：DE69205718D1

公开(公告)日：1995-12-07

申请号：DE69205718

申请日：1992-04-01

Applicant: EBARA CORP

Inventor： KOMATA KIMIO ,  OTANI TOSHIHIRO ,  HISABE YASUSHI ,  CHIBA KATSUTOSHI ,  MACHIDA AKIHIRO

IPC: F16C17/02 ,  F16C17/04 ,  F16C17/10 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C39/06 ,  G02B26/12

Abstract: A hydrodynamic bearing apparatus for supporting a rotating member on a support shaft (10) provided on a stationary member through a radial hydrodynamic bearing (12) and a thrust hydrodynamic bearing (13), the apparatus comprising a magnetic member (26) provided on the rotating member; and a magnet provided on the rotating member opposing the magnetic member (26) provided on the stationary member; whereby the magnetic member (26) is attracted by the magnetic force from the magnet so that a force acting on the thrust hydrodynamic bearing (12) are cancelled or reduced.

公开(公告)号：DE69205718T2

公开(公告)日：1996-05-09

申请号：DE69205718

申请日：1992-04-01

Applicant: EBARA CORP

Inventor： KOMATA KIMIO ,  OTANI TOSHIHIRO ,  HISABE YASUSHI ,  CHIBA KATSUTOSHI ,  MACHIDA AKIHIRO

IPC: F16C17/02 ,  F16C17/04 ,  F16C17/10 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C39/06 ,  G02B26/12

Abstract: A hydrodynamic bearing apparatus for supporting a rotating member on a support shaft (10) provided on a stationary member through a radial hydrodynamic bearing (12) and a thrust hydrodynamic bearing (13), the apparatus comprising a magnetic member (26) provided on the rotating member; and a magnet provided on the rotating member opposing the magnetic member (26) provided on the stationary member; whereby the magnetic member (26) is attracted by the magnetic force from the magnet so that a force acting on the thrust hydrodynamic bearing (12) are cancelled or reduced.

公开(公告)号：AT129786T

公开(公告)日：1995-11-15

申请号：AT92105628

申请日：1992-04-01

Applicant: EBARA CORP

Inventor： KOMATA KIMIO ,  OTANI TOSHIHIRO ,  HISABE YASUSHI ,  CHIBA KATSUTOSHI ,  MACHIDA AKIHIRO

IPC: F16C17/02 ,  F16C17/04 ,  F16C17/10 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C39/06 ,  G02B26/12

Abstract: A hydrodynamic bearing apparatus for supporting a rotating member on a support shaft (10) provided on a stationary member through a radial hydrodynamic bearing (12) and a thrust hydrodynamic bearing (13), the apparatus comprising a magnetic member (26) provided on the rotating member; and a magnet provided on the rotating member opposing the magnetic member (26) provided on the stationary member; whereby the magnetic member (26) is attracted by the magnetic force from the magnet so that a force acting on the thrust hydrodynamic bearing (12) are cancelled or reduced.

公开(公告)号：JP2005077298A

公开(公告)日：2005-03-24

申请号：JP2003309618

申请日：2003-09-02

Applicant: Ebara Corp ,  株式会社荏原製作所

Inventor： OTANI TOSHIHIRO

IPC: G01L5/00 ,  G01N29/00 ,  G01N29/04 ,  G01N29/24 ,  H04R13/00 ,  G01N29/18 ,  G01N29/20

CPC classification number: G01N2291/02827

Abstract: PROBLEM TO BE SOLVED: To provide an electromagnetic ultrasonic probe in exclusive use for a longitudinal wave having high accuracy by improving accuracy by generating a sufficiently-strong longitudinal wave, and an electromagnetic ultrasonic probe in common use for a longitudinal wave and a transversal wave having high accuracy by improving accuracy by generating a longitudinal wave and a transversal wave which are sufficiently strong. SOLUTION: Two magnets 22, 23 having mutually different sectional areas vertical to the polarization direction are arranged adjacently in the state where polarization direction axes thereof are parallel and the polarization directions thereof are mutually reverse, and a track-shaped plane coil 24 is arranged so that the linearly-parallel whole wire is in contact with one pole tip face of the magnet 22 having the smaller area at one spot between two spots where the wire is mutually linearly parallel, and mainly a longitudinal ultrasonic wave is transmitted/received by the track-shaped plane coil 24 relative to a metal material 2. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 解决的问题：为了通过产生足够强的纵波提高精度，提供高精度的纵波的电磁式超声波探头，以及通常用于纵波的电磁超声波探头和 通过产生足够强的纵波和横波提高精度，具有高精度的横波。 解决方案：具有与偏振方向垂直的相互不同的截面积的两个磁体22,23在其偏振方向轴平行并且其偏振方向相互反向的状态下相邻布置，并且轨道形平面线圈24 被布置成使得线状平行的全部线与磁体22的一个极尖端面接触，磁极22的一个极点在两个点之间的一个点处，其中线彼此线性平行，并且主要是纵向超声波被发送/接收 通过轨道形平面线圈24相对于金属材料2.版权所有：（C）2005，JPO＆NCIPI

公开(公告)号：JPH09257760A

公开(公告)日：1997-10-03

申请号：JP9190196

申请日：1996-03-21

Applicant: EBARA CORP

Inventor： OTANI TOSHIHIRO ,  OGI HIROTSUGU ,  HIRAO MASAHIKO

IPC: G01N29/04

Abstract: PROBLEM TO BE SOLVED: To accurately grasp the change within a material in a fatigue process to evaluate remaining life at the initial stage of a fatigue advance process by generating burstlike ultrasonic resonation in an object to be measured by an electromagnetic ultrasonic transducer. SOLUTION: In an electromagnetic ultrasonic transducer 1, when a permanent magnet 2 of the like forms a static magnetic field 11 in the depth direction of an object 30 to be measured and a high frequency burst wave current is allowed to flow to a plane coil 3 from a controller 6, ultrasonic traversal waves 15 are generated. The ultrasonic traversal waves repeat reflection within the object 30 to be measured to generate burst like ultrasonic resonation. The eddy current 19 by the reflected ultrasonic waves is detected by the plane coil 3 and this detection signal is amplified by a preamplifier 4 and a main amplifier 5 to be sent to a computer 40 through the controller 6. A fatigue advance process is monitored while referring to the data base of the attenuation curve preliminarily stored in the computer 40. That is, life is measured by utilizing the behavior of the peak of the attenuation curve.

公开(公告)号：JPH01249997A

公开(公告)日：1989-10-05

申请号：JP7585488

申请日：1988-03-31

Applicant: EBARA CORP

Inventor： OSADA NORIYUKI ,  SAKAI JUNICHI ,  OTANI TOSHIHIRO ,  SASAKI KATSUMI ,  YOSHIDA KAZUTAKA

IPC: F04D29/02 ,  F04D29/04 ,  F04D29/056 ,  F04D29/58

Abstract: PURPOSE:To prevent a rotor section from temperature rise by providing a conduction path through which cooling gas flows in a fixed shaft between a tubular body and a holder and between the interior of said tubular body and the fixed shaft. CONSTITUTION:Conduction paths 31, 32 are provided in a tubular body 14 and holder 15, a conduction path 33 is provided between the interior of the tubular body 14 and a fixed shaft 9 and a conduction path 34 is provided in the fixed shaft 9. Thus, cooling gas discharged from a cooler 29 enters a rotor chamber 30 from a gas introducing path and reaches a rotor 17 through the respective conduction paths 31-34 so that the rotor 17 section can be prevented from temperature rise.

公开(公告)号：JPH01249992A

公开(公告)日：1989-10-05

申请号：JP7584888

申请日：1988-03-31

Applicant: EBARA CORP

Inventor： OSADA NORIYUKI ,  SAKAI JUNICHI ,  OTANI TOSHIHIRO ,  ANZAI AKIRA ,  YOSHIDA KAZUTAKA

IPC: F04D29/02 ,  F04D29/04 ,  F04D29/056 ,  F04D29/057 ,  F04D29/58

Abstract: PURPOSE:To stabilize running by connecting an impeller made of a heat resisting material to a rotor and supporting both ends of the rotor and the front and rear surfaces of same respectively with a spiral groove radial dynamic pressure bearing section and a thrust dynamic pressure bearing bearing to make a fixed shaft of a cooling pipe. CONSTITUTION:An end of a fixed shaft 1 terminates in a motor rotor 2 or impeller 10 to provide a center fixed shaft, and an impeller 10 made of a ceramic sintered body is connected to the rotor 2 both ends of which are supported by spiral groove dynamic pressure bearing sections 12, 13. The rear surface of the rotor 2 and the front face of the impeller 10 are respectively supported by thrust bearing sections 14, 15 to dispose a cooling pipe 6 in the fixed shaft 1. Thus, the pressure receiving area of the thrust bearing section 14 at the front surface of the impeller 10 is increased and the cooling action of the rotor 2 is intensified to prevent the magnetic property of the motor 4 from degradation, so that a blower can be stably run.

公开(公告)号：JPH01249987A

公开(公告)日：1989-10-05

申请号：JP7584688

申请日：1988-03-31

Applicant: EBARA CORP

Inventor： OSADA NORIYUKI ,  SAKAI JUNICHI ,  OTANI TOSHIHIRO ,  KUBE YASUSHI ,  YOSHIDA KAZUTAKA

IPC: F04D25/06

Abstract: PURPOSE:To enable a blower to be run without any troubles even in the start by forming a thrust dynamic pressure bearing between the upper surface of an impeller and a casing and between the lower side face of the impeller and the casing. CONSTITUTION:When current is supplied to a stator coil 27, a rotary drive force is given to a permanent magnet 24 and an impeller 10 starts to rotate so that gas to be handled is sucked into and discharged from a casing 3 while a stationary running condition is reached. Even if a thrust acts to press the impeller against the casing 3 side, the thrust is received by a spiral groove thrust dynamic pressure bearing on the lower side face consisting of the rotary side thrust receiving surface 14 on the lower surface of the impeller 10 and the fixed side thrust receiving surface 17 of a bearing plate. When the reversed thrust acts. it is received by a spiral groove thrust dynamic pressure bearing on the upper side face.

公开(公告)号：JPH01249985A

公开(公告)日：1989-10-05

申请号：JP7584488

申请日：1988-03-31

Applicant: EBARA CORP

Inventor： OSADA NORIYUKI ,  SAKAI JUNICHI ,  OTANI TOSHIHIRO ,  UEKUSA HISAO ,  YOSHIDA KAZUTAKA

IPC: F04D25/06

Abstract: PURPOSE:To prevent a blower from the effect of thermal strain and improve the stability and durability by interconnecting a rotor and an impeller through an elastic member capable of supporting them mainly with joint constitution capable of transmitting rotary torque. CONSTITUTION:A blower casing 5 is mounted directly on an end of a motor casing 8 receiving a motor 4. A motor rotor 2 and an impeller 10 are rotatably supported on a fixed shaft 1 provided to extend through the centers of said casings 8, 5 through spiral groove radial dynamic pressure bearings 12, 13. The rotor 2 and impeller 10 are interconnected mainly by joint constitution 24 capable of transmitting rotary torque through an elastic member 21 capable of elastically supporting said rotor 2 and impeller 10. The heat of high temperature gas flowing in the blower casing 5 is insulated by the irregular connecting surface of the elastic member 21.

公开(公告)号：JPH04307108A

公开(公告)日：1992-10-29

申请号：JP9953791

申请日：1991-04-04

Applicant: EBARA CORP

Inventor： KOMATA KIMIO ,  OTANI TOSHIHIRO ,  KUBE YASUSHI ,  CHIBA KATSUTOSHI ,  MACHIDA AKIHIRO

IPC: F16C17/02 ,  F16C17/04 ,  F16C17/10 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C39/06 ,  G02B26/12

Abstract: PURPOSE:To provide a hydrodynamic bearing unit that is capable of reducing the extent of torque at time of starting. CONSTITUTION:In a hydrodynamic bearing unit which supports a rotator on a fulcrum shaft at the fixed body side via a radial hydrodynamic bearing 12 and two thrust hydrodynamic bearings 13, 14, a support member 20 of this rotator is formed with a magnetic substance, while a magnet 26 attracting this support member is installed at the rotator side, and the support member 20 of the rotator is attracted by magnetic force of the magnet 26, through which dead load of the rotator to be added to the thrust hydrodynamic bearing 14 and another force are all offset or reduced.