DE102009022536A1 - Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid - Google Patents
Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid Download PDFInfo
- Publication number
- DE102009022536A1 DE102009022536A1 DE102009022536A DE102009022536A DE102009022536A1 DE 102009022536 A1 DE102009022536 A1 DE 102009022536A1 DE 102009022536 A DE102009022536 A DE 102009022536A DE 102009022536 A DE102009022536 A DE 102009022536A DE 102009022536 A1 DE102009022536 A1 DE 102009022536A1
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- shaft
- fluid dynamic
- gap
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/107—Grooves for generating pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1085—Channels or passages to recirculate the liquid in the bearing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
- G11B19/2036—Motors characterized by fluid-dynamic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sliding-Contact Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Gebiet der ErfindungField of the invention
Die Erfindung betrifft ein fluiddynamisches Lagersystem gemäß den Merkmalen des Oberbegriffs des Anspruchs 1. Derartige fluiddynamische Lagersysteme werden beispielsweise zur Drehlagerung von Spindelmotoren eingesetzt, die wiederum zum Antrieb von Speicherplattenlaufwerken verwendet werden.The The invention relates to a fluid dynamic bearing system according to the Features of the preamble of claim 1. Such fluid dynamic storage systems are used, for example, for the rotational mounting of spindle motors, which in turn is used to drive storage disk drives become.
Stand der TechnikState of the art
Fluiddynamische Lagersysteme umfassen in der Regel mindestens zwei relativ zueinander drehbare Lagerbauteile, die zwischen einander zugeordneten Lagerflächen einen mit einem Lagerfluid, z. B. einem Lageröl, gefüllten Lagerspalt ausbilden. In bekannter Weise sind auf den Lagerflächen Lagerrillenstrukturen aufgebracht. Die Lagerrillenstrukturen erzeugen bei relativer Drehung der Lagerbauteile zueinander innerhalb des Lagerspaltes einen hydrodynamischen Druck. Dieser hydrodynamische Druck macht das Lager tragfähig.fluid Dynamic Storage systems typically include at least two relative to one another rotatable bearing components, between mutually associated bearing surfaces one with a bearing fluid, e.g. B. a bearing oil filled Training camp gap. In a known manner are on the storage areas Lagerrillenstrukturen applied. Create the bearing groove structures relative rotation of the bearing components to each other within the Bearing gap a hydrodynamic pressure. This hydrodynamic Pressure makes the bearing sustainable.
Aus dem Stand der Technik sind eine Reihe verschiedener Bauformen für fluiddynamische Lager bekannt.Out The prior art is a number of different types of fluid dynamic bearings known.
Aus
Ein ähnliches
Lagersystem zeigt die
Wenn der Rezirkulationskanal radial außerhalb des Axiallagers endet, so besitzt das Lagerfluid in diesem Bereich Umgebungsdruck, und somit besitzt auch der damit verbundene untere Bereich des Stopperrings Umgebungsdruck. Dadurch können sich Luftblasen innerhalb des Lagers bilden, was den Abrieb vergrößert und die Lebensdauer des Lagers verringert.If the recirculation passage radially outside of the thrust bearing ends, the bearing fluid in this area has ambient pressure, and thus also has the associated lower portion of the stop locking Ambient pressure. This can cause air bubbles inside of the bearing, which increases the abrasion and reduces the life of the bearing.
Offenbarung der ErfindungDisclosure of the invention
Es ist die Aufgabe der Erfindung, ein fluiddynamisches Lager der eingangs genannten Art anzugeben, bei dem die Anordnung des Rezirkulationskanals optimiert ist, um eine bessere Druckverteilung im Inneren des Lagers zu erhalten.It The object of the invention is a fluid dynamic bearing of the above specify the type mentioned, in which the arrangement of the recirculation channel is optimized to better pressure distribution inside the warehouse to obtain.
Diese Aufgabe wird erfindungsgemäß durch ein fluiddynamisches Lagersystem mit den Merkmalen des Anspruchs 1 gelöst.These The object is achieved by a fluid dynamic Storage system solved with the features of claim 1.
Bevorzugte Ausgestaltungen der Erfindung und weitere vorteilhafte Merkmale sind in den abhängigen Ansprüchen angegeben.preferred Embodiments of the invention and further advantageous features are indicated in the dependent claims.
Die Erfindung beschreibt ein fluiddynamisches Lager mit einer Lagerbuchse und einer drehbar in der Lagerbohrung der Lagerbuchse gelagerten Welle. Es ist ein mit der Welle verbundenes Rotorbauteil vorhanden. Ein mit einem Lagerfluid gefüllter Lagerspalt umfasst einen axialen Abschnitt zwischen einander gegenüberliegenden Oberflächen der Welle und der Lagerbuchse sowie einen radialen Abschnitt zwischen einander gegenüberliegenden Oberflächen der Lagerbuchse und des Rotorbauteils. Das Lagersystem umfasst mindestens ein fluiddynamisches Radiallager im Bereich des axialen Abschnitts des Lagerspaltes, das durch einander zugeordnete Lagerflächen der Welle und der Lagerbuchse gebildet wird. Ferner ist ein fluiddynamisches Axiallager im Bereich des radialen Abschnitts des Lagerspaltes ausgebildet, das durch einander zugeordnete Lagerflächen der Lagerbuchse und des Rotorbauteils gebildet wird. An einem Ende der Welle ist ein Stopperring als Sicherung für die Welle angeordnet. Ein Rezirkulationskanal ist vorgesehen, der eine erste Öffnung in einem an den Stopperring angrenzenden Abschnitt des Lagerspaltes und eine zweite Öffnung im radialen Abschnitt des Lagerspaltes aufweist.The The invention describes a fluid dynamic bearing with a bearing bush and a rotatably mounted in the bearing bore of the bearing bush shaft. There is a rotor component connected to the shaft. One bearing gap filled with a bearing fluid comprises a axial section between each other Surfaces of the shaft and the bearing bush and a radial Section between opposing surfaces of the Bearing bush and the rotor component. The storage system comprises at least a fluid dynamic radial bearing in the region of the axial section the bearing gap, the mutually associated bearing surfaces the shaft and the bearing bush is formed. Furthermore, a fluid dynamic Thrust bearing formed in the region of the radial portion of the bearing gap, the mutually associated bearing surfaces of the bearing bush and the rotor component is formed. At one end of the shaft is a stopper ring arranged as a backup for the shaft. A recirculation passage is provided which has a first opening in a section of the bearing gap adjoining the stopper ring and a second opening in the radial portion of the bearing gap having.
Erfindungsgemäß sind radial außerhalb der zweiten Öffnung des Rezirkulationskanals auf einer Oberfläche der Lagerbuchse und/oder des Rotorbauteils Druck erzeugende Rillenstrukturen angeordnet.According to the invention radially outside the second opening of the recirculation passage on a surface of the bearing bush and / or the rotor component Pressure generating groove structures arranged.
Die Rillenstrukturen radial außerhalb der Öffnung des Rezirkulationskanals erzeugen eine Pumpwirkung in Richtung des Lagerinneren, also in Richtung des Rezirkulationskanals. Dadurch erhöht sich das gesamt Druckniveau innerhalb des Lagersystems, was sich positiv auf ein mögliches Ausgasen des Lagerfluids innerhalb des Lagersystems auswirkt. Durch die Rillenstrukturen bzw. Pumpstrukturen wird das Druckniveau an der oberen Öffnung des Rezirkulationskanals und damit auch gleichzeitig an der unteren Öffnung des Rezirkulationskanals im Inneren des Lagersystems im Bereich des Stopperringes erhöht.The groove structures radially outwardly of the opening of the recirculation passage create a pump effect in the direction of the bearing interior, ie in the direction of the recirculation channel. This increases the overall pressure level within the storage system, which has a positive effect on a possible outgassing of the bearing fluid within the storage system. By the groove structures or pumping structures, the pressure level at the upper opening of the recirculation channel and thus simultaneously increased at the lower opening of the recirculation passage in the interior of the bearing system in the region of the stopper ring.
Auch radial innerhalb der Mündung des Rezirkulationskanals sind auf einer Lagerfläche der Lagerbuchse und/oder einer dieser Lagerfläche gegenüber liegenden Lagerfläche des Rotorbauteils Druck erzeugende Lagerrillenstrukturen als Teil des fluiddynamischen Axiallagers ausgebildet.Also are radially within the mouth of the recirculation channel on a bearing surface of the bearing bush and / or one of these Storage area opposite storage area the rotor component pressure generating Lagerrillenstrukturen as part formed of the fluid dynamic thrust bearing.
Die erfindungsgemäßen Rillenstrukturen können Teil der Lagerrillenstrukturen des Axiallagers sein und ineinander übergehen, wobei der Rezirkulationskanal dann innerhalb der Lagerfläche bzw. der Lagerrillenstrukturen des Axiallagers mündet.The groove structures according to the invention can Be part of the bearing groove structures of the thrust bearing and merge into one another, wherein the recirculation passage then within the storage area or the Lagerrillenstrukturen the thrust bearing opens.
Auf einer Lagerfläche der Lagerbuchse und/oder auf einer Lagerfläche der Welle sind ebenfalls Druck erzeugende Lagerrillenstrukturen als Teil des mindestens einen fluiddynamischen Radiallagers ausgebildet. Vorzugsweise umfasst das Lagersystem zwei Radiallager, die in einem gegenseitigen Abstand entlang des axialen Abschnittes des Lagerspaltes angeordnet sind und die jeweils durch Lagerrillenstrukturen gekennzeichnet sind.On a bearing surface of the bearing bush and / or on a bearing surface The shaft are also pressure generating Lagerrillenstrukturen formed as part of the at least one fluid dynamic radial bearing. Preferably, the storage system comprises two radial bearings, which in a mutual distance along the axial portion of the bearing gap are arranged and each characterized by Lagerrillenstrukturen are.
Vorzugsweise ist der Rezirkulationskanal innerhalb der Lagerbuchse angeordnet. Der Rezirkulationskanal kann dabei parallel zur Drehachse verlaufen aber auch schräg in einem Winkel zur Drehachse, wobei die zweite Öffnung einen größeren radialen Abschnitt von der Drehachse aufweist als die erste Öffnung.Preferably the recirculation passage is arranged inside the bearing bush. The recirculation channel can run parallel to the axis of rotation but also obliquely at an angle to the axis of rotation, the second opening a larger radial section from the rotation axis than the first opening.
Der Lagerspalt ist radial außerhalb der Rillenstrukturen durch einen Dichtungsspalt abgedichtet. Der Dichtungsspalt setzt sich am Außenumfang der Lagerbuchse fort und wird durch Oberflächen der Lagerbuchse sowie eine radial nach innen weisende Umfangfläche des Rotorbauteils begrenzt.Of the Bearing gap is radially outside of the groove structures through sealed a sealing gap. The sealing gap settles on the outer circumference of the bushing and is passing through surfaces the bushing and a radially inwardly facing peripheral surface of the rotor component limited.
Das Lagersystem ist Teil eines Spindelmotors mit einem Stator und einem Rotor, der mittels des fluiddynamischen Lagersystems gegenüber dem Stator drehgelagert ist. Der Antrieb des Motors erfolgt durch ein elektromagnetisches Antriebssystem.The Bearing system is part of a spindle motor with a stator and a Rotor, by means of the fluid dynamic bearing system opposite is rotatably mounted on the stator. The motor is driven by an electromagnetic drive system.
Der Spindelmotor kann Teil eines Festplattenlaufwerkes sein, wobei der Motor mindestens eine magnetische Speicherplatte drehend antreibt, und das Festplatten-laufwerk eine Schreib- und Lesevorrichtung zum Schreiben und Lesen von Daten auf oder von der magnetischen Speicherplatte aufweist.Of the Spindle motor may be part of a hard disk drive, wherein the Motor drives at least one magnetic disk rotating, and the hard disk drive a writing and reading device for Write and read data to or from the magnetic disk having.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen näher erläutert. Aus den Zeichnungen und ihrer Beschreibung ergeben sich weitere Merkmale und Vorteile der Erfindung.The Invention will be described below with reference to an embodiment explained in more detail with reference to the drawings. From the drawings and their description arise more Features and advantages of the invention.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Beschreibung eines bevorzugten Ausführungsbeispiels der ErfindungDescription of a preferred Embodiment of the invention
In
An
einem freien Ende der Welle
Zur
Aufnahme von axialen Kräften entlang der Drehachse
Das
Rotorbauteil
Um
eine Zirkulation des Lagerfluids im Lagerspalt
Erfindungsgemäß mündet
der Rezirkulationskanal
- 1010
- Lagerbuchsebearing bush
- 1212
- Wellewave
- 1414
- Lagerspaltbearing gap
- 14a14a
- axialer Abschnittaxial section
- 14b14b
- radialer Abschnittradial section
- 1616
- Stopperringstopper ring
- 1818
- Radiallagerradial bearings
- 2020
- LagerrillenstrukturenBearing groove structures
- 2222
- Radiallagerradial bearings
- 2424
- LagerrillenstrukturenBearing groove structures
- 2626
- Rotorbauteilrotor component
- 2828
- Axiallagerthrust
- 3030
- LagerrillenstrukturenBearing groove structures
- 3232
- Rezirkulationskanalrecirculation
- 32a32a
- erste Öffnungfirst opening
- 32b32b
- zweite Öffnungsecond opening
- 3434
- Rillenstrukturengroove structures
- 3636
- Abdeckplattecover
- 3838
- Dichtungsspaltseal gap
- 4040
- Basisplattebaseplate
- 4242
- Statoranordnungstator
- 4444
- Rotormagnetrotor magnet
- 4646
- Drehachseaxis of rotation
- 4848
- Speicherplattedisk
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102007036790 A1 [0004] DE 102007036790 A1 [0004]
- - US 7290934 B2 [0005] - US 7290934 B2 [0005]
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009022536A DE102009022536A1 (en) | 2009-05-25 | 2009-05-25 | Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009022536A DE102009022536A1 (en) | 2009-05-25 | 2009-05-25 | Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009022536A1 true DE102009022536A1 (en) | 2010-12-02 |
Family
ID=43028313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102009022536A Pending DE102009022536A1 (en) | 2009-05-25 | 2009-05-25 | Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102009022536A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021238A1 (en) * | 2010-05-21 | 2011-11-24 | Minebea Co., Ltd. | Fluid dynamic bearing system and spindle motor with such a storage system |
DE102013015437A1 (en) * | 2013-09-18 | 2015-03-19 | Minebea Co., Ltd. | Fluid dynamic bearing system and spindle motor with such a storage system |
EP2634441A4 (en) * | 2010-10-26 | 2015-08-05 | Ihi Corp | Spiral-grooved thrust bearing |
GB2532857A (en) * | 2014-10-15 | 2016-06-01 | HGST Netherlands BV | Fluid dynamic bearing groove configuration |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030231813A1 (en) * | 2002-06-11 | 2003-12-18 | Sankyo Seiki Mfg. Co., Ltd. | Dynamic pressure bearing device |
US20040091187A1 (en) * | 2002-11-05 | 2004-05-13 | Aiello Anthony Joseph | Single thrust-journal bearing cup fluid dynamic bearing motor |
US6914358B2 (en) * | 2002-06-13 | 2005-07-05 | Nidec Corporation | Spindle motor and disk drive furnished therewith |
US6920013B2 (en) * | 2003-11-07 | 2005-07-19 | Nidec Corporation | Disk drive spindle motor with radial inward thrust area annular protruding portion and bearing member communicating passage |
US20060126981A1 (en) * | 2004-12-15 | 2006-06-15 | Seagate Technology Llc | Grooving in FDB motor capillary seal |
US7201517B2 (en) * | 2003-06-23 | 2007-04-10 | Nidec Corporation | Hydrodynamic bearing device and a recording disk drive equipped with it |
US7290934B2 (en) | 2004-09-09 | 2007-11-06 | Nidec Corporation | Fluid dynamic-pressure bearing device and spindle motor |
DE102007036790A1 (en) | 2007-08-03 | 2009-02-05 | Minebea Co., Ltd. | Fluid dynamic bearing system for pivot bearing of motors, particularly spindle motor for fixed disk drive or blower, has fixed bearing components where shell of components forms angle between zero to ten degree with rotation axis |
DE102007039231A1 (en) * | 2007-08-20 | 2009-02-26 | Minebea Co., Ltd. | Fluid-dynamic bearing system for rotatably supporting spindle motor to drive hard disk drive, has bearing surfaces arranged at inner circumference of bearing bush and outer circumference of flange ring to form radial bearing |
DE102007046248A1 (en) * | 2007-09-26 | 2009-04-09 | Minebea Co., Ltd. | Fluid dynamic bearing with recirculation channel |
-
2009
- 2009-05-25 DE DE102009022536A patent/DE102009022536A1/en active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030231813A1 (en) * | 2002-06-11 | 2003-12-18 | Sankyo Seiki Mfg. Co., Ltd. | Dynamic pressure bearing device |
US6914358B2 (en) * | 2002-06-13 | 2005-07-05 | Nidec Corporation | Spindle motor and disk drive furnished therewith |
US20040091187A1 (en) * | 2002-11-05 | 2004-05-13 | Aiello Anthony Joseph | Single thrust-journal bearing cup fluid dynamic bearing motor |
US7201517B2 (en) * | 2003-06-23 | 2007-04-10 | Nidec Corporation | Hydrodynamic bearing device and a recording disk drive equipped with it |
US6920013B2 (en) * | 2003-11-07 | 2005-07-19 | Nidec Corporation | Disk drive spindle motor with radial inward thrust area annular protruding portion and bearing member communicating passage |
US7290934B2 (en) | 2004-09-09 | 2007-11-06 | Nidec Corporation | Fluid dynamic-pressure bearing device and spindle motor |
US20060126981A1 (en) * | 2004-12-15 | 2006-06-15 | Seagate Technology Llc | Grooving in FDB motor capillary seal |
DE102007036790A1 (en) | 2007-08-03 | 2009-02-05 | Minebea Co., Ltd. | Fluid dynamic bearing system for pivot bearing of motors, particularly spindle motor for fixed disk drive or blower, has fixed bearing components where shell of components forms angle between zero to ten degree with rotation axis |
DE102007039231A1 (en) * | 2007-08-20 | 2009-02-26 | Minebea Co., Ltd. | Fluid-dynamic bearing system for rotatably supporting spindle motor to drive hard disk drive, has bearing surfaces arranged at inner circumference of bearing bush and outer circumference of flange ring to form radial bearing |
DE102007046248A1 (en) * | 2007-09-26 | 2009-04-09 | Minebea Co., Ltd. | Fluid dynamic bearing with recirculation channel |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021238A1 (en) * | 2010-05-21 | 2011-11-24 | Minebea Co., Ltd. | Fluid dynamic bearing system and spindle motor with such a storage system |
US9214182B2 (en) | 2010-05-21 | 2015-12-15 | Minebea Co., Ltd. | Fluid dynamic bearing system and a spindle motor having this kind of bearing system |
EP2634441A4 (en) * | 2010-10-26 | 2015-08-05 | Ihi Corp | Spiral-grooved thrust bearing |
DE102013015437A1 (en) * | 2013-09-18 | 2015-03-19 | Minebea Co., Ltd. | Fluid dynamic bearing system and spindle motor with such a storage system |
GB2532857A (en) * | 2014-10-15 | 2016-06-01 | HGST Netherlands BV | Fluid dynamic bearing groove configuration |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102009019936A1 (en) | Fluid dynamic storage system | |
DE102007046248A1 (en) | Fluid dynamic bearing with recirculation channel | |
DE102007039231B4 (en) | Fluid dynamic storage system | |
DE102011016888A1 (en) | Fluid-dynamic bearing system of hard disk drive assembly, comprises sealing gap that is limited by seal faces of bearing portions and rotor component, and groove formed in transition region between bearing gap and sealing gap | |
DE102009022536A1 (en) | Fluid dynamic bearing system for spindle motor of hard disk drive, has bearing sleeve, shaft pivotably supported in bearing bore of bearing sleeve shaft, rotor component connected with shaft, and bearing gap filled with bearing fluid | |
DE102008057551A1 (en) | Fluid dynamic bearing system for rotary bearing of e.g. wheel in fan, has insertion part i.e. circular disk, arranged at rotary and fixed bearing components, and forming bearing surfaces of bearing components | |
DE102009038034A1 (en) | Fluid dynamic bearing for rotational mounting of spindle motor and for actuating hard disk drives, has fixed shaft, which defines rotational axis, and bearing component with bearing surface | |
DE102015006477A1 (en) | Fluid dynamic storage system | |
DE102014019055A1 (en) | Fluid dynamic bearing system for pivotal mounting of a spindle motor | |
DE102011015121A1 (en) | Fluid dynamic bearing system used in spindle motor for driving storage disk of hard disk drive, has pumping seal whose groove structures are arranged on opening of extended axial portion of sealing structure | |
DE102011108465A1 (en) | Fluid-dynamic bearing system of spindle motor for hard disc drive, has recirculation channel that is connected to sealing gap, and outer periphery of bearing gap that is connected to annular gap | |
DE102009008008B4 (en) | Fluid dynamic bearing for a spindle motor | |
DE102011018358B4 (en) | Spindle motor with a fluid dynamic bearing system and hard disk drive with such a spindle motor | |
DE102009031219A1 (en) | Spindle motor for driving hard disk drive, has magnetic prestress-generating unit generating magnetic force for bearing exclusively from components of drive system, where hydraulic and magnetic forces are directed in opposite direction | |
DE102011111396A1 (en) | Spindle motor for hard disk drive for driving memory disk and writing and reading device, has fluid dynamic bearing system with fixed motor component and movable motor component, which is pivoted mounted by fluid dynamic bearing system | |
DE102009042521A1 (en) | Fluid dynamic bearing system for use in spindle motor of hard disk drive utilized for rotary drive of magnetic storage disk, has bearing groove structures or pump structures pumping bearing fluid in direction of opening of channel | |
DE102011111062A1 (en) | Fluid dynamic bearing system of spindle motor used for operating hard disk drive for rotary-driving magnetic storage disk, has asymmetrical-arranged radial bearing grooves towards which bearing fluid is predominantly promoted | |
DE102012004746A1 (en) | Dynamic fluid bearing for rotatably mounting rotor with respect to stator of spindle motor for driving hard disk drive assembly of computer system, has stationary bearing element and shaft connected with each other by pivot connection | |
DE102010056252A1 (en) | Fluid dynamic bearing system for spindle motor used in hard disk drive, has separator plate that is arranged between fluid dynamic radial bearings and formed with groove to enlarge bearing gap between shaft and bearing bush | |
DE102009059992A1 (en) | Fluid dynamic bearing system for supporting of rotor against stator in spindle motor in hard disk drive for rotary driving of magnetic storage disk, has channels whose sections exhibit increased radial distance to axes than openings | |
DE102009005395A1 (en) | Fluid dynamic bearing system for e.g. spindle motor of hard disk drive, has stopper ring arranged at shaft as safety ring and fastened at outer circumference by snap-fit connection or screw connection | |
DE102022116144A1 (en) | Fluid dynamic bearing system and spindle motor with such a bearing system | |
DE102012016575A1 (en) | Fluid-dynamic bearing system for spindle motor of hard disk drive, has large diameter portion whose faces form radial bearing, where radial bearing and pumping seal are arranged along large diameter portion of shaft | |
DE102013014931A1 (en) | Fluid dynamic storage system | |
DE102009061868B3 (en) | Fluid dynamic bearing for a spindle motor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R012 | Request for examination validly filed | ||
R084 | Declaration of willingness to licence | ||
R081 | Change of applicant/patentee |
Owner name: MINEBEA MITSUMI INC., JP Free format text: FORMER OWNER: MINEBEA CO., LTD., NAGANO-KEN, JP |
|
R082 | Change of representative |
Representative=s name: RIEBLING, PETER, DIPL.-ING. DR.-ING., DE |
|
R016 | Response to examination communication |