JP6199675B2 - 焼結金属軸受、及びこの軸受を備えた流体動圧軸受装置 - Google Patents
焼結金属軸受、及びこの軸受を備えた流体動圧軸受装置 Download PDFInfo
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- JP6199675B2 JP6199675B2 JP2013196973A JP2013196973A JP6199675B2 JP 6199675 B2 JP6199675 B2 JP 6199675B2 JP 2013196973 A JP2013196973 A JP 2013196973A JP 2013196973 A JP2013196973 A JP 2013196973A JP 6199675 B2 JP6199675 B2 JP 6199675B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/062—Details of the bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
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- 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
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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- 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
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- 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
- F16C33/1005—Construction relative to lubrication with gas, e.g. air, as lubricant
- F16C33/101—Details of the bearing surface, e.g. means to generate pressure such as lobes or wedges
- F16C33/1015—Pressure generating grooves
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- 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
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
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- 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
- F16C33/109—Lubricant compositions or properties, e.g. viscosity
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- 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
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
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- 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
- F16C33/14—Special methods of manufacture; Running-in
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/22—Manufacture essentially without removing material by sintering
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- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/10—Porosity
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- 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
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
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- 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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
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- 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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
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- 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
- F16C2360/00—Engines or pumps
- F16C2360/46—Fans, e.g. ventilators
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- 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
- F16C2361/00—Apparatus or articles in engineering in general
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- 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
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- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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- 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
Description
まず、最終的な製品となる焼結金属軸受8の材料となる原料粉末を用意し、これを金型プレス成形により所定の形状に圧縮成形する。具体的には、図示は省略するが、ダイと、ダイの孔内に挿入配置されるコアピンと、ダイとコアピンとの間に配設され、ダイに対して昇降可能に構成された下パンチ、および、ダイと下パンチの何れに対しても相対変位(昇降)可能に構成された上パンチとで構成される成形金型を用いて原料粉末の圧縮成形を行う。この場合、ダイの内周面とコアピンの外周面、および、下パンチの上端面とで区画形成される空間に原料粉末を充填し、然る後、下パンチを固定した状態で上パンチを下降させ、充填状態の原料粉末を軸方向に加圧する。そして、加圧しながら所定の位置まで上パンチを下降させ、原料粉末を所定の軸方向寸法にまで圧縮することで、圧粉成形体が成形される。この際、圧粉成形体の軸方向寸法は、上パンチの下端面と、下パンチの上端面との距離、より具体的には上パンチの下死点を、目標とすべき軸方向寸法(この後の焼結、各種サイジングによる寸法変化を考慮して設定)に応じて制御することで、適切な範囲に設定可能となる。
上述のようにして、圧粉成形体を得た後、この圧粉成形体を原料粉末に応じた温度で焼結することにより、焼結体を得る。
そして、焼結体に対して寸法サイジングを施して、焼結体の外径寸法や内径寸法、及び軸方向寸法を最終製品に準じた寸法に矯正すると共に、内周面8aの表面開孔率を、動圧軸受として好適な割合に調整する。この段階では、焼結体の内周面8aに所定の動圧溝8a1配列領域は未だ形成されてない。同様に、図示は省略するが、焼結体の両端面8b,8cに所定の動圧溝8b1,8c1配列領域は未だ形成されていない。
上記一連の工程を経て得られた焼結体に対して所定の動圧溝サイジングを施すことで、焼結体の内周面8aに動圧溝配列領域A1,A2を成形する。ここで使用する成形装置は、図示は省略するが、焼結体の圧入穴を有するダイと、ダイの圧入穴に挿入可能に配置されるサイジングピンと、ダイとサイジングピンとの間に配設され、ダイに対して相対的に昇降可能に構成された下パンチ、および、ダイと下パンチの何れに対しても昇降可能に構成された上パンチとを有する。この場合、ダイの圧入穴の内径寸法は、サイジングすべき焼結体の圧入代に応じて適宜設定される。また、サイジングピンの外周面には、成形すべき内周面8aの動圧溝配列領域A1,A2(図3)に対応する形状の成形型が設けられると共に、上パンチの下端面、及び下パンチの上端面にはそれぞれ、成形すべき上端面8bの動圧溝8b1配列領域、下端面8cの動圧溝8c1配列領域(図4(a)(b))に対応する形状の成形型がそれぞれ設けられる。
2 ファンモータ
3 情報機器
4 ベース
5 ファン
6 駆動部
7 ハウジング
7a 内周面
8 焼結金属軸受
8a 内周面
8a1 動圧溝(内周面)
8a2 傾斜丘部
8a3 帯部
8b 上端面
8b1 動圧溝(上端面)
8c 下端面
8c1 動圧溝(下端面)
9 回転部材
10 ハブ部
10a 円盤部
10a1 下端面
12 フランジ部
13 蓋部材
A1,A2 動圧溝配列領域
R1,R2 ラジアル軸受部
T1,T2 スラスト軸受部
S シール空間
Claims (6)
- 原料粉末を軸方向に圧縮成形したものを焼結することで形成された筒状の多孔質体であって、内周面に動圧発生部が設けられると共に、内部気孔に潤滑油が充填されている焼結含油軸受において、
動圧発生部として、円周方向に対して傾斜させた複数の動圧溝を配列してなる動圧溝配列領域が軸方向に連続して形成され、
表面を含む表層部の気孔は封止剤で封止されることなく開孔しており、
軸方向寸法が6mm以下とされると共に、軸受全体の密度比が80%以上でかつ95%以下であって、かつ
軸受内部における表層部と芯部との間での密度比のばらつき、又は軸方向一方側と軸方向他方側との間での密度比のばらつきが何れも3%以下に抑えられていることを特徴とする焼結含油軸受。 - 軸方向で連続する動圧溝配列領域は何れもヘリングボーン形状をなし、各動圧溝配列領域を構成する動圧溝がその軸方向中央側で連続している請求項1に記載の焼結含油軸受。
- 内径寸法が3mm以下で、かつ外径寸法が6mm以下とされる請求項1に記載の焼結含油軸受。
- 請求項1〜3の何れか一項に記載の焼結含油軸受と、焼結含油軸受の内周に挿通される軸部と、焼結含油軸受の内周面と軸部の外周面との間に形成されるラジアル軸受隙間とを備え、少なくとも焼結含油軸受の内部空孔と、ラジアル軸受隙間に潤滑油が充填されている流体動圧軸受装置。
- 潤滑油は、40℃での動粘度が20cSt以上でかつ170cSt以下を示し、100℃での動粘度が2cSt以上でかつ50cSt以下を示すものである請求項4に記載の流体動圧軸受装置。
- 請求項4又は5に記載の流体動圧軸受装置と、軸部に取付けられるファンとを備えたファンモータ。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013196973A JP6199675B2 (ja) | 2013-09-24 | 2013-09-24 | 焼結金属軸受、及びこの軸受を備えた流体動圧軸受装置 |
CN201480052728.7A CN105579720B (zh) | 2013-09-24 | 2014-09-05 | 烧结金属含油轴承、具备其的流体动压轴承装置及风扇电动机 |
PCT/JP2014/073554 WO2015045813A1 (ja) | 2013-09-24 | 2014-09-05 | 焼結金属軸受、及びこの軸受を備えた流体動圧軸受装置 |
KR1020167005646A KR102206759B1 (ko) | 2013-09-24 | 2014-09-05 | 소결 금속 베어링, 및 이 베어링을 구비한 유체 동압 베어링 장치 |
US15/021,771 US10415573B2 (en) | 2013-09-24 | 2014-09-05 | Fluid-dynamic bearing device provided with a sintered metal bearing and a fan motor provided with the fluid-dynamic bearing device |
EP14849434.7A EP3051156B1 (en) | 2013-09-24 | 2014-09-05 | Sintered metal bearing, fluid-dynamic bearing device provided with said bearing, and fan motor provided with said bearing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013196973A JP6199675B2 (ja) | 2013-09-24 | 2013-09-24 | 焼結金属軸受、及びこの軸受を備えた流体動圧軸受装置 |
Publications (2)
Publication Number | Publication Date |
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JP2015064019A JP2015064019A (ja) | 2015-04-09 |
JP6199675B2 true JP6199675B2 (ja) | 2017-09-20 |
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JP2018061408A (ja) * | 2016-10-07 | 2018-04-12 | 日本電産株式会社 | ファンモータ |
US20180298911A1 (en) * | 2017-04-17 | 2018-10-18 | Hao Lee | Shaft structures of fan |
CN108869541B (zh) * | 2018-01-12 | 2024-04-02 | 刘慕华 | 一种径向轴承、转子系统及径向轴承的控制方法 |
US20190353177A1 (en) * | 2018-05-21 | 2019-11-21 | Asia Vital Components Co., Ltd. | Fan frame seat and fan thereof |
JP7320365B2 (ja) * | 2019-03-28 | 2023-08-03 | Ntn株式会社 | 焼結金属製コンロッド、及びその製造方法 |
US11873903B2 (en) | 2019-12-19 | 2024-01-16 | Eaton Intelligent Power Limited | Self-correcting hydrodynamic seal |
US11209047B1 (en) * | 2020-07-14 | 2021-12-28 | John Wun-Chang Shih | Liquid guiding structure for fluid dynamic pressure bearing |
JP2023047578A (ja) * | 2021-09-27 | 2023-04-06 | Ntn株式会社 | 動圧軸受及びこれを備えた流体動圧軸受装置 |
WO2023243496A1 (ja) * | 2022-06-14 | 2023-12-21 | Ntn株式会社 | 流体動圧軸受用潤滑油組成物、流体動圧軸受、及び流体動圧軸受装置 |
JP2024043207A (ja) * | 2022-09-16 | 2024-03-29 | Ntn株式会社 | 動圧軸受、動圧軸受装置及びモータ |
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JPS5873611A (ja) | 1981-10-24 | 1983-05-02 | Tadao Sasaki | 導水圧管路による水路の布設方法 |
JPS607492A (ja) | 1983-06-27 | 1985-01-16 | 富士通株式会社 | 単音節音声認識方式 |
JPS636810A (ja) | 1986-06-26 | 1988-01-12 | Toshiba Corp | 超電導コイルの製造方法 |
GB2322915B (en) | 1997-03-06 | 2001-06-06 | Ntn Toyo Bearing Co Ltd | Hydrodynamic type porous oil-impregnated bearing |
JP3607492B2 (ja) | 1997-03-06 | 2005-01-05 | Ntn株式会社 | 動圧型多孔質含油軸受およびその製造方法 |
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JP2007231966A (ja) * | 2006-02-27 | 2007-09-13 | Hitachi Powdered Metals Co Ltd | 焼結動圧軸受の製造方法 |
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JP5674495B2 (ja) * | 2011-01-31 | 2015-02-25 | Ntn株式会社 | 流体動圧軸受装置 |
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CN105579720A (zh) | 2016-05-11 |
JP2015064019A (ja) | 2015-04-09 |
EP3051156A4 (en) | 2017-07-05 |
CN105579720B (zh) | 2019-01-22 |
WO2015045813A1 (ja) | 2015-04-02 |
EP3051156A1 (en) | 2016-08-03 |
EP3051156B1 (en) | 2020-04-22 |
KR102206759B1 (ko) | 2021-01-25 |
KR20160058765A (ko) | 2016-05-25 |
US10415573B2 (en) | 2019-09-17 |
US20160230769A1 (en) | 2016-08-11 |
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