CN1061420C - 具有保持器的液压轴承 - Google Patents

具有保持器的液压轴承 Download PDF

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CN1061420C
CN1061420C CN97115434A CN97115434A CN1061420C CN 1061420 C CN1061420 C CN 1061420C CN 97115434 A CN97115434 A CN 97115434A CN 97115434 A CN97115434 A CN 97115434A CN 1061420 C CN1061420 C CN 1061420C
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internals
fluid bearing
retainer
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bearing
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CN1173595A (zh
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金昇坤
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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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
    • F16C17/026—Sliding-contact bearings for exclusively rotary movement for radial load only with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves
    • 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
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/40—Alloys based on refractory metals
    • F16C2204/42—Alloys based on titanium
    • 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
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/20—Application independent of particular apparatuses related to type of movement
    • F16C2300/22—High-speed rotation
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sliding-Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Abstract

一种液压轴承，包括：一对彼此相对地固定在旋转轴上的内件；一具有与所述内件的润滑面相对应的润滑面的外件，以便旋转支撑所述内件；和一安装在所述内件之间的所述轴上的保持器，以便在所述内件和外件之间保持一空隙，并且所述保持器与所述外件间隔一预定间隙，以便起一个轴颈轴承的作用。此液压轴承不大，但具有优良的承载径向向内负荷的能力。

Description

具有保持器的液压轴承
本发明涉及液压轴承，特别涉及具有保持器的液压轴承。
一般用于高连旋转的液压轴承包括半球形液压轴承和止推轴承。
一般说来，液压轴承的优点是小型，可用于承载一个轴向和径向作用的大的负荷。
图1示出一种用于硬盘驱动器心轴电机，或激光打印机、激光扫描器旋转多边形镜驱动电机的传统的半球形液压轴承。如图所示，这种传统的半球形液压轴承包括：固定在轴1上彼此相对的上下半球形内件2和3；具有与上下内件2和3配合的半球形槽5a和5b的一个外件，它可旋转地耦合到轴1上；压缩上下内件2和3使它们不能偏离轴1的连接环6a和6b；和在上下内件2和3之间耦合到轴1上使上下内件2和3和外件5之间保持空隙的保持器7。
因为润滑油放入到上下内件2和3和外件5之间的空隙中，上下内件和外件5通过液体摩擦可以在不互相接触的情况下彼此相对旋转。
具有上述结构的传统半球形液压轴承的径向负荷特性取决于上下内件2和3的半径。换言之，为了适应在上下内件2和3的径向作用的大的负荷，上下内件必须大。但鉴于装置的结构特征，上下内件可以增加的尺寸有限制。因此必须开发一种内件尺寸大小保持不变，但对径向负荷具有大的承载力的液压轴承。
本发明的目的是提供一种尺寸与传统液压轴承相同但对径向负荷具有大的承载力的液压轴承。
为了实现本发明的上述目的，液压轴承包括：固定到旋转轴上彼此相对的一对内件；具有润滑面的外件，该润滑面与内件的润滑面相对应，使得可旋转地支撑内件；和一在两内件之间安装在轴上的保持器，该保持器保持在两内件和外件之间的空隙，并与外件间隔一预定间隙，起到轴颈轴承的作用。
参照下列附图对一优选实施例的详细介绍会使本发明上述目的和优点变得更清楚，其中：
图1是常规液压轴承的剖面图；
图2是根据本发明的具有改进的保持器的液压轴承的剖面图；
图3是图2所示液压轴承的部分剖开的透视图；
图4和5是分别取自图3的Ⅳ-Ⅳ和Ⅴ-Ⅴ线的平面剖视图。
参看图2和图3，本发明优选实施例的液压轴承包括：固定到轴10上彼此相对的上下半球形内件20和30；具有半球形槽50a和50b的一个外件50，半球形槽分别耦合到上下内件20和30，该外件50可旋转地与轴10耦合；连接环60a和60b压缩上下内件20和30，使它们不能偏离轴1O；和一个保持器70，该保持器在上下内件之间与轴10耦合，在上下内件20、30和外件50之间保持间隙。
这里，连接环60a、60b可以配合或螺纹装配。
根据本发明的特征，保持器70保持上下内件20和30和外件50之间的空隙，并象轴颈轴承那样承载径向力。
详细地说，保持器70是固定到轴10上或上下内件20和30上进行旋转。保持器70和外件50之间的间隙由相应于上下内件20和30和外件50之间的空隙的间隙保持，以致保持器70通过与外件50的作用起轴颈轴承的作用。因此，液压轴承对径向负荷的承载力提高到保持器可以承受的径向力的程度。
在保持器70的外圆周表面形成一个槽71。槽71通过油或保持器70旋转时引入的空气产生液压力，从而将保持器70与外件50分开。
在上下内件20和30的润滑面上也可形成一个一般的槽(未示出)。如所知那样，该槽通过油和引入的空气产生液压力将上下内件20和30从外件50升起。
上下内件20和30和保持器70最好由高碳钢或钨钴合金(WCo)制造。如图4和5所示，具有5-20μm厚的钛(Ti)薄膜层72a和72b最好涂复在保持器70和上下内件20和30上。而且，具有5-20μm厚的钛膜层(未示出)可以涂复在由高碳钢或钨钴合金(WCo)制的外件50的润滑面上。
上下内件20和30、保持器70和外件50可以由陶瓷制造，在它的润滑面上可形成氧化铝(Al2O3)的膜层。
如图4所示，为了减低保持器70和外件50的摩擦造成的磨损，厚度为0．05-0．5μm的人造金刚石(diamond like carbon(DLC))膜层73可以涂复在保持器70的钛膜72a上。具有与钛膜72a相似的线膨胀系数的DLC膜层73不会引起磨损或间隙变化，而比钛膜72a更有耐磨性。
在本发明的液压轴承中，对径向负荷的承载力，通过保持器70的轴承作用而提高。换言之，传统半球型液压轴承对径向负荷的承载力是上下内件承载力之和，但本发明液压轴承对径向负荷的承载力是上下内件和保持器的承载力之和。
如上所述，根据本发明的半球形液压轴承可以在不改变整个尺寸的情况下提高对径向负荷的承载力。
虽然参考图中所示的实施例已对本发明进行了介绍，但这仅是一个例子。了解本技术的人士容易作出种种修改和其他等同的方案。因此，本发明的保护范围必须通过本发明的技术实质加以限定。

Claims (8)

1．一种液压轴承，该轴承包括：一对内件，它们固定在旋转轴上，彼此相对；一外件，它具有一润滑面，此润滑面与所述内件的润滑面相对应，以便旋转支撑所述内件；和一保持器，该保持器安装在所述内外件之间的所述轴上，用于在所述内件和外件之间保持一空隙，其特征在于：所述保持器与所述外件间隔开一预定间隙，以便起到一轴颈轴承的作用。
2．根据权利要求1所述的液压轴承，其特征在于，在所述外件和保持器之间的间隙与所述内件和外件之间的空隙相应。
3．根据权利要求1或2所述的液压轴承，其特征在于，在所述保持器外圆周面上形成一个槽。
4．根据权利要求3所述的液压轴承，其特征在于，在所述外件和内件的润滑面上形成一个槽。
5．根据权利要求1或2所述的液压轴承，其特征在于，在所述外件和保持器的至少一个之上的润滑面上形成钛膜层。
6．根据权利要求5所述的液压轴承，其特征在于，所述钛膜层的厚度为5-20μm。
7．根据权利要求5所述的液压轴承，其特征在于，一人造金钢石(Diamond Like Carbon(DLC))膜层进一步在所述钛膜层之上形成。
8．根据权利要求7所述的液压轴承，其特征在于，所述DLC膜层的厚度是0．05-0．5μm。
CN97115434A 1996-07-27 1997-07-24 具有保持器的液压轴承 Expired - Fee Related CN1061420C (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1019960030876A KR100189929B1 (ko) 1996-07-27 1996-07-27 스페이서를 갖는 유체베어링
KR30876/96 1996-07-27
KR30876/1996 1996-07-27

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CN1061420C true CN1061420C (zh) 2001-01-31

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JP (1) JP2954903B2 (zh)
KR (1) KR100189929B1 (zh)
CN (1) CN1061420C (zh)
MY (1) MY119187A (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100305428B1 (ko) * 1999-07-20 2001-11-01 이형도 반구베어링을 갖는 스핀들 모터
CN107429735B (zh) * 2015-03-18 2019-08-06 Bmts科技有限两合公司 涡轮增压机
DE202016105071U1 (de) 2016-09-13 2016-11-03 Martin Berger Hydrodynamisches Gleitlager und Abgasturbolader
JP7178809B2 (ja) * 2018-06-25 2022-11-28 ミネベアミツミ株式会社 スピンドルモータ
JP7224182B2 (ja) * 2018-12-28 2023-02-17 ミネベアミツミ株式会社 流体動圧軸受およびスピンドルモータ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5018880A (en) * 1988-06-28 1991-05-28 Canon Kabushiki Kaisha Dynamic pressure bearing device
CN1183516A (zh) * 1995-12-28 1998-06-03 三星电子株式会社 半球形流体轴承

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5018880A (en) * 1988-06-28 1991-05-28 Canon Kabushiki Kaisha Dynamic pressure bearing device
CN1183516A (zh) * 1995-12-28 1998-06-03 三星电子株式会社 半球形流体轴承

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KR100189929B1 (ko) 1999-06-01
JP2954903B2 (ja) 1999-09-27
MY119187A (en) 2005-04-30
KR980009986A (ko) 1998-04-30
JPH1078029A (ja) 1998-03-24
CN1173595A (zh) 1998-02-18

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