CN1050434C - 对小角度摆动应用中轴承的密封 - Google Patents
对小角度摆动应用中轴承的密封 Download PDFInfo
- Publication number
- CN1050434C CN1050434C CN93107646A CN93107646A CN1050434C CN 1050434 C CN1050434 C CN 1050434C CN 93107646 A CN93107646 A CN 93107646A CN 93107646 A CN93107646 A CN 93107646A CN 1050434 C CN1050434 C CN 1050434C
- Authority
- CN
- China
- Prior art keywords
- bearing
- seal assembly
- film
- bearing seal
- described film
- 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.)
- Expired - Fee Related
Links
- 230000010355 oscillation Effects 0.000 title claims description 7
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 claims 1
- 230000004323 axial length Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002775 capsule Substances 0.000 description 19
- 238000007789 sealing Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 241000937413 Axia Species 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Images
Classifications
-
- 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
- F16C33/72—Sealings
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/50—Other types of ball or roller 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1446—Reducing contamination, e.g. by dust, debris
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1446—Reducing contamination, e.g. by dust, debris
- G11B33/1466—Reducing contamination, e.g. by dust, debris sealing gaskets
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4813—Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
- Moving Of Heads (AREA)
Abstract
用于往复摆动执行机构的轴承密封组件包括外轴承座圈,与外座圈同心安装的内轴承座圈,液体不可渗透的可变形环状薄膜,薄膜的轴向长度不大于其半径的十分之一,内周边缘密封地固定到内轴承座圈上,外周边缘密封地固定到外插承座圈上,以使内座圈和外座圈之间相对旋转时,该薄膜具有最小的轴向变形。在一种实施例中,薄膜被拉伸以消除在扭转应力下的表面变形。另一种实施例将波状物模压成薄膜以减少扭转力。
Description
本发明涉及对小角度应用的密封轴,特别关系到用在硬盘式磁性数据存贮装置的旋转传动机构上的改进的轴密封。
硬盘存贮装置有一磁头接触到磁盘表面,它非常精密,决不允许有沾污物。这种存贮装置具有可动部分,例如传动装置和安装在加了润滑油的滚珠或滚柱轴承上的臂。当存贮装置内的压力和温度改变时,引起空气流经轴承。该气流吸附着并载带着润滑脂的小微粒以及挥发的有机物微粒,这些微粒可以到达记录磁盘表示并附着在那里。这些沾污物会影响那里所使用的精心设计的润滑剂的性能。
根据现有的工艺情况,采用侧边防护或橡胶密封圈来防止润滑脂被带出轴承套外。然而,为了使主轴能够转动,在防护圈(或橡胶密封圈)的内径边缘与轴承内座圈的外边缘之间总是留有空隙,这就使沾污物有三种路径通过:
1.润滑脂气化物不断地从这个间隙扩散渗出。
2.高速存取数据所引起的扰动使气化物以及悬浮微粒经过该间隙对流循环。
3.轴承套上、下端之间的压差引起轴向流动,该轴向流动带有悬浮微粒和润滑脂气化物。
磁盘驱动器的形状因素对密封圈容许的轴向长度有如此严格的约束,以致于没有能够使用的已知的密封圈。例如,在不把间隙作为形状因素考虑的某些应用下,使用了波纹管型密封圈。可参见美国专利No.3,700,297(1972,10,24公开,Fickenwirth等),用于飞机控制翼面。现有技术的其他一些例子在以下几个专利中有详细说明:美国专利No.4,208,060(1980,6,17,St.Lauret,Jr);美国专利No.3,489,019(1970,1,13 Giegerich),以及美国专利No.2,469,114(1949,5,3 Hofst)。
因此,最好是能得到允许小角度摆动的高度有效的密封圈。
本发明的主要目的是提供一种改进的用于硬盘式磁性数据存贮装置的旋转传动机构上的轴密封。
本发明的用于一小角度摆动传动装置的轴承密封组件,包括:一外轴承座圈;一与上述外座圈同圆心安装的内轴承座圈;一具有内周边缘和外周边缘的可变形的环状薄膜,第一粘接装置将所述内周边缘密封地固定在上述内轴承座圈上,第二粘接装置将该外周边缘密封地固定在上述外轴承座圈上,其特征在于:所述薄膜被模压成螺旋状花纹,与平面薄膜上在扭转应力下形成的扭曲花纹相垂直,从而使该薄膜可以在上述内轴承座圈和上述外轴承座圈之间以最小的轴向扭曲作有限的相对旋转。
由于本发明的轴密封被模压成螺旋状花纹,该螺旋状花纹与平面密封膜上在扭转应力下形成的扭曲花纹相垂直,因此,能降低对扭矩的需要,从而使本发明的轴密封能允许小角度摆动,而有效地防止沾污物通过。
本发明的上述和其他的目的及其优点在结合附图阅读了下列描述后将会变得清楚明了。
图1是表现本发明最佳实施例的磁盘驱动器的部件分解透视图;
图2是本发明提供的一个实施例的透视图;
图3是局部断面详图,显示了轴承和密封圈组件的详图;
图4是图3中密封圈部分的放大的详图;
图5是透视图,说明环状扁平薄膜密封圈在扭转时的变形;
图6是图5中沿线6-6的剖面图;
图7是本发明的一种实施例的薄膜密封圈的仰视图(组装的第一步);
图8是图7所示实施例的透视图;
图9是按本发明另一种实施例的薄膜密封圈的透视图;
图10是图9中沿直线10-10的剖视图;
图11是按本发明又一个实施例的薄膜密封圈的透视图;
图12是按本发明再一个实施例的薄膜密封圈的俯视图;
图13是根据本发明的又一实施例的薄膜密封圈的截面图。
参考附图,图一为一刚性盘或硬盘式磁性数据存贮装置,用数字10表示。硬盘存贮装置包括内罩壳12和14,多层刚性磁盘的磁盘组件被安装在里面,再装在外罩壳或底盘16上。转臂组件装好后能借助于轴承封壳(bearing capsule)20绕转轴18作小角度摆动,该转臂组件包括向外伸展的多层臂22,在其最外端为读写头24。转轴18用螺钉组件装在罩壳12上的孔26里。在罩壳12内,音圈与磁铁30相配合。臂22架在中间并控制读写头24相对于磁盘组的多层磁盘的位置,磁盘组可以转动地装在两个罩壳12和14接合处。
图2说明了基于本发明的轴承和密封圈组件。如图示说明,轴承组件45包括内轴承圈44和外轴承圈46以及连结在它们之间的密封膜52。密封膜52的内径边与内轴承圈44的端面连接,其外径边与外轴承圈46的端面连接。
参见图3,转动臂组件22装在罩壳12的极狭窄的空间内,安在转轴18的轴承封壳组件20上,转轴18通常伸到并连接在罩壳的上壁板12A和12B之间。罩壳12有一定的尺寸和构造以符合规定的形状因数范围,转臂组件22也必须适合并工作在上罩壳壁板12A和下罩壳壁板12b之间所限定的空间内,正如从图1所看到的那样,转臂组件22相对于中心位置来回旋转或摆动以保持读/写头24与磁盘组32的磁盘34上的磁道在一条线上。
转臂组件靠滚柱轴承封壳20装在转轴18上,转轴18安装在上壁板12A和12B之间。这里采用滚柱轴承一词,意在表示它既包括珠型滚轴亦包括柱型滚轴。转轴18安装在罩壳12的上壁板12A上的孔26和下壁板12B上的孔36内。固定的方法是采用如38那样的合适的内六角螺钉以及伸缩夹紧环40向外扩张并分别夹紧孔26和孔36所在的壁板。
主动转臂组件22借助于滚柱轴承封壳20固定,以便能绕转轴18的轴心转动或摆动。滚柱轴承封壳包括完全相同的上、下滚柱轴承按轴向隔开的关系支承在空心套筒42的相对的两个轴端面上。上滚柱轴承件包括内轴承圈44和外轴承圈46,如图所示,在槽中有许多滚珠轴承的滚珠(roller)排列在中间。内轴承圈44压配合在转轴18的外圆柱表面,外轴承圈46则压配合在,例如,主动转臂组件内部的孔50内。滚柱轴承放在主动转臂的孔5050内的最外边的位置或末端,以便对转臂提供最大的稳定支承。
各个滚柱轴承的外端都与各自的罩壳壁板隔开一段距离d,在通常的设计中这段距离大约为2.2毫米,即0.086英寸的数量级。每个轴承座圈的高度大约为6毫米的数量级。这样,轴承端面与罩壳之间有2.2毫米的间隔为轴承密封圈提供了可用的间隙或间隔。
如前所述,环状密封膜52的内边缘通过合适的粘接装置54固定在内轴承圈44上,外边缘通过粘接装置56固定在外轴承圈46上。正如将要谈到的,该密封膜52可以具有许多物理及结构上的特点。但最可取的特点是抗渗、有弹性和被卡紧,以便当转臂组合在原始位置或中间位置时,密封膜上不存在扭转应力。在典型的实施例中,转臂组件22转动的角度相对中间位置或原始位置而言每边都大约有7至10度。但在某些应用中,转臂从中间位置向两边均可以转到15度。密封膜52的结构使其能以最小的扭矩在规定的间隙空间内转动,而不会偏转而与罩壳壁相接触。转向与罩壳壁相接触将导致密封件的过度磨损和过早失效。因此,密封膜的厚度相对其半径或直径来说必须是很小的。
在轴承端面与罩壳之间存在的密封间隙空间58很有限时,最好采用具有最小轴向偏转的扁平型密封膜。如图5所示,扁平膜受到旋转扭矩时翘曲成图中所示的平面扭曲的形状。在施加张力的状态下,此翘曲产生沿轴向向外偏转的隆起或波纹60。这些隆起部分大致沿内径边的切线与径向成一定角度地向外延伸至外径边处。翘曲发生前需要的旋转度数取决于密封膜的初始张力。如果拉伸密封膜以致于其平面张力有很高的各向同性,那么,在所考虑的旋转范围内可避免翘曲。对本申请来说,密封薄膜必须具有两个所需的特性。这两个特性是指能以最小的扭矩和最小的轴向位移或变形得到所希望的旋转角度。图示的应用中的最大轴向尺寸不大于密封薄膜的半径的四分之一。
当密封膜旋转时,在其被粘结的边缘处产生高的应力集中。这会引起其边缘处发生较大的变形和位移。利用弹性粘结剂,例如,粘结剂54和56将密封膜粘结到轴承上可以减小变形和位移。通过将密封膜的边缘做厚些而中心薄些(如图6所示的密封膜52),也可以降低高的应力集中。
现在参看图7、图8,附图说明了预加应力的密封膜的一种典型实施例及其制造方法。在该实施例中,选用了弹性膜66,并将其拉展开盖在第一个环状圈68上(图7),再借助于第二个环状圈70将其卡紧在那里(图8)。把被拉伸的密封膜放在轴承组件的端面上,如图8所示。在那里外圈72有一圈粘结剂74而内圈76有一圈粘结剂78。然后将预加应力的密封膜贴在粘结剂的表面上使其与粘结剂相粘结。一旦粘结好,就把膜66上多余的材料去掉,形成一个孔以便把转轴18安装在轴承组件或封壳内。预拉伸的密封膜可以使向中心位置两侧的满偏转达8至10度而没有轴向偏移或变形。最佳情况是密封膜被拉伸到刚好足以达到的全程没有变形,而且密封膜没有被过度拉伸。过度拉伸将给密封膜增加不必要的扭矩。对不容许有任何偏差的、很有限的密封圈间隙空间来说,这是一个理想的结构。但该结构有一个缺点就是需要有较大的扭矩才能旋转控制臂。
在可以得到足够大小的间隙时,可将薄膜模压成某些外形以满足旋转和应力的条件而没有过分的轴向移动。可以把这些薄膜外形模压成在希望的运动范围内提供最小应力扭矩的形式。具体参见图9、图10,模压成形的薄膜80在部件间隙所允许的最大距离范围内具有垂直的正弦曲线形状的波纹。模压成形的薄膜80有许多从薄膜表面沿轴向突出的波形82。这些波纹最好是在轴和沿轴的方向伸展。该薄膜需要的扭矩很低,因为薄膜可以通过弯曲而不用通过拉伸来满足部件旋转的条件。薄膜的表面在受力状态下趋于变平。薄膜在弯曲状态比在拉伸状态下硬度要小得多。对附加的扭矩要求所关心的旋转范围就变得完全可以忽略不计了。
参见图11,薄膜84上沿径向有螺旋状的人字型脊峰或波纹86,它的延伸始终与图5中所示的拉伸应力线相垂直。人字型脊峰或波纹的始端大体与薄膜的内径边缘相垂直。这种结构使得在以其内端顺时针旋转时具有最小的拉伸应力或扭矩。薄膜可以主要通过弯曲调节旋转。这样需要的扭矩就比通过拉伸的方法要小的多。对于轴承外座圈从原始位置开始只作顺时针旋转的应用情况,这种结构被确定为最佳结构。其它情况下变化将是明显的。
参见图12,薄膜88相对图11所示的样式增加了镜象图型。在该实施例中,薄膜88有两个螺旋状、人字形脊峰90和92,它们沿两个方向从内径边向外延伸到外边缘或外径边。这种结构可以调节从中心位置或中间位置向两个方向的旋转使它们都具有最小的扭矩。此外,在空间可以用来调节其标定轴向尺寸时,这些薄膜也是有用的。它们设计成可安装并工作在很小的轴向空间内,一般小于密封薄膜外径的四分之一,最好小于外半径的十分之一。它们在旋转范围内需要的扭矩也很小。
图13说明的是一种将密封膜附着到滚柱轴承座圈上的替代装置。在该实施例中,密封圈94利用卡环96将其内边缘固定到轴承内圈98上。密封圈的外边缘是利用外卡环100固定到轴承外圈102上的。卡环与径向伸展的凸缘相重叠,下垂的侧缘紧贴在各轴承座圈的外圆表面上覆盖密封膜的各个周缘。这样就将密封膜紧紧卡在轴承组件的轴承座圈上。
可以实现各种结构的密封薄膜的不同组合。例如,薄膜的结构可以是完全不可渗透的,或者有不同程度的可渗透性。薄膜的结构还可以具有不同程度的弹性及不同程度的加厚部分,例如借助于纤维材料。这提供了适合安装在很窄的空间内、并且可满足旋转及轴向位移要求的密封薄膜。
例1:上述薄膜可以成对使用,在轴承组件或封壳的两端各用一个,如图3所示。这两个密封圈可以是一样的,也可以是不同的。例如,图3所示的密封膜104整个覆盖伸展开并用粘结剂或其它合适的粘结物106及108将其粘附在下轴承组件的外轴圈110和内轴圈112上。这种有两个相同的不可渗透密封膜的配置保证了轴承封壳上下两端均为不可渗透薄膜密封。这种结构可以避免所有由轴承的润滑成分造成的污染。然而,当温度变化时,轴承封壳内的气压将改变,轴承封壳内、外的气压差会引起密封膜膨胀或凸出。这一点可以通过提供一个很小的扩散通道得以解决,例如提供一空心槽或孔将轴承封壳的内部与外部环境空气连接起来。硬磁盘部件内完全升温或凉下来所需要的时间通常在大约45分钟的量级。正如图3说明的那样,很有限的扩散管道114可以在上述的时间间隔内将所要求的空气量从轴承封壳内引导到传动机构之外。在恒温条件下,对通道的扩散将可忽略不计。
例2:可以采取将单个密封膜放在轴承封壳的一端而另一端敞开或仅有防护罩的构成形式。这种配置消除了流经轴承封壳的轴向气流,由于它消除了一端的空隙,所以可以将轴承封壳的两端因振动和扩散引起的污染率降低大约一半。
例3:还可以取另一种构成形式:轴承封壳的一端为半渗透性薄膜,另一端为不可渗透性薄膜。这种组成允许气体(诸如氧气和氮气等)从半渗透性膜向外扩散,但可防止有机润滑剂大微粒的通过。这就使得在轴承封壳结构中不再需要有扩散通道。
例4:可以在轴承封壳的两个端面上装有过滤膜。过滤膜减少但不能消除轴向气流扩散和紊流。它将阻挡悬浮微粒及较大微粒流过。这种过滤膜(例如Gore公司用长丝聚四氟乙烯制造的那种)的优点在于在受拉时它具有极低的受力常数。这在需要很低扭转阻力的地方就可能是理想的结构。
我们已经通过许多实施例说明和介绍了我们的发明,不用对此所做的变化或改进并未脱离本发明的精神和范围。
Claims (9)
1.用于一小角度摆动传动装置的轴承密封组件,包括:
一外轴承座圈;
一与上述外座圈同圆心安装的内轴承座圈;
一具有内周边缘和外周边缘的可变形的环状薄膜,第一粘接装置将所述内周边缘密封地固定在上述内轴承座圈上,第二粘接装置将该外周边缘密封地固定在上述外轴承座圈上,其特征在于:
所述薄膜被模压成螺旋状花纹,与平面薄膜上在扭转应力下形成的扭曲花纹相垂直,从而使该薄膜可以在上述内轴承座圈和上述外轴承座圈之间以最小的轴向扭曲作有限的相对旋转。
2.根据权利要求1的轴承密封组件,其特征在于:所述薄膜被模压成既有顺时针螺旋状花纹又有逆时针螺旋状花纹。
3.根据权利要求1的轴承密封组件,其特征在于:所述薄膜对环境中的气化物是不可渗透的。
4.根据权利要求1或3的轴承密封组件,其特征在于:所述薄膜对有机气化物基本上是不可渗透的,而对于包括氮和氧的环境气体基本上是可渗透的。
5.根据权利要求1的轴承密封组件,其特征在于:所述薄膜周机械卡紧装置固定在所述内轴承座圈和外轴承座圈上。
6.根据权利要求1的轴承密封组件,其特征在于:所述薄膜用粘接剂粘接到所述内、外轴承座圈上。
7.根据权利要求6的轴承密封组件,其特征在于:所述薄膜在附着到上述内、外轴承座圈上之前被各向同性地拉伸。
8.根据权利要求1的轴承密封组件,其特征在于:上述轴承组件的两端面都用薄膜覆盖着,且其上开有扩散通路孔。
9.根据权利要求1的轴承密封组件,其特征在于:所述薄膜的结构被做成使其在旋转范围内的最小轴向扭曲变形的量小于所述薄膜的外半径的十分之一。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US922,290 | 1992-07-30 | ||
US07/922,290 US5416657A (en) | 1992-07-30 | 1992-07-30 | Seal for bearings in small angle oscillation applications |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1122418A CN1122418A (zh) | 1996-05-15 |
CN1050434C true CN1050434C (zh) | 2000-03-15 |
Family
ID=25446834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN93107646A Expired - Fee Related CN1050434C (zh) | 1992-07-30 | 1993-06-30 | 对小角度摆动应用中轴承的密封 |
Country Status (9)
Country | Link |
---|---|
US (2) | US5416657A (zh) |
EP (1) | EP0581364A1 (zh) |
JP (1) | JP2592212B2 (zh) |
KR (1) | KR970009127B1 (zh) |
CN (1) | CN1050434C (zh) |
CA (1) | CA2091911A1 (zh) |
MY (1) | MY114355A (zh) |
SG (1) | SG42880A1 (zh) |
TW (1) | TW246730B (zh) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100425340B1 (ko) * | 1997-08-30 | 2004-05-17 | 삼성전자주식회사 | 디스크 클램핑 장치 |
JP2001084716A (ja) * | 1999-09-14 | 2001-03-30 | Minebea Co Ltd | 磁気ヘッド駆動用ピボットアセンブリ |
KR100445489B1 (ko) | 1999-11-15 | 2004-08-21 | 마츠시타 덴끼 산교 가부시키가이샤 | 바이오 센서, 박막 전극 형성 방법, 정량 장치, 및 정량방법 |
US6793581B2 (en) * | 2000-12-15 | 2004-09-21 | Gkn Driveline North America, Inc. | Venting solution for constant velocity joint |
JP2003013957A (ja) * | 2001-04-24 | 2003-01-15 | Ferrotec Corp | 磁性流体を使用したhdd用ピボット軸受 |
US7031104B1 (en) * | 2002-04-30 | 2006-04-18 | Western Digital Technologies, Inc. | Disk drive having guide-vanes |
GB0219781D0 (en) * | 2002-08-23 | 2002-10-02 | Rolls Royce Plc | Seals and a method of making seals |
JP2004092666A (ja) * | 2002-08-29 | 2004-03-25 | Minebea Co Ltd | ハードディスクドライブ用ピボットアッセンブリ |
JP2004092870A (ja) | 2002-09-03 | 2004-03-25 | Minebea Co Ltd | ハードディスクドライブ用ピボットアッセンブリ |
WO2005037070A2 (en) | 2003-10-11 | 2005-04-28 | The Regents Of The University Of California | Method and system for nerve repair, nanoknife, mems platform and uses thereof |
WO2007092852A2 (en) | 2006-02-06 | 2007-08-16 | Mynosys Cellular Devices, Inc. | Microsurgical cutting instruments |
KR100753794B1 (ko) | 2006-07-27 | 2007-08-31 | 도시바삼성스토리지테크놀러지코리아 주식회사 | 광디스크 드라이브 및 그 작동 방법 |
JP2011165284A (ja) * | 2010-02-12 | 2011-08-25 | Funai Electric Co Ltd | ディスク装置 |
US10994687B2 (en) * | 2018-12-11 | 2021-05-04 | Autoliv Asp, Inc. | Airbag compression wrappers and related airbag assemblies |
CN111457093A (zh) * | 2019-01-21 | 2020-07-28 | 舍弗勒技术股份两合公司 | 密封装置及轴承组件 |
CN110243731B (zh) * | 2019-07-03 | 2021-09-24 | 苏州新实医疗科技有限公司 | 抑菌圈直径动态测量方法、测量装置及可读存储介质 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3700297A (en) * | 1969-11-24 | 1972-10-24 | Us Federal Aviation Admin | Flexible oscillatory motion bearing seal |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2469114A (en) * | 1945-06-02 | 1949-05-03 | Pitometer Log Corp | Shaft seal |
US2946609A (en) * | 1958-04-08 | 1960-07-26 | Orenda Engines Ltd | Labyrinth seal |
US3489019A (en) * | 1969-02-10 | 1970-01-13 | Gen Electric | Hermetic seal and shaft assembly |
US4208060A (en) * | 1979-01-15 | 1980-06-17 | Bellofram Corporation | Sealed shaft |
US4253675A (en) * | 1979-11-01 | 1981-03-03 | Bellofram Corporation | Improvements of sealed shafts |
US4444400A (en) * | 1980-04-22 | 1984-04-24 | National Research Development Corporation | Seal assemblies and corrugated metal packer members therefor |
US4658312A (en) * | 1981-09-07 | 1987-04-14 | Papst-Motoren Gmbh & Co. K.G. | Disk storage drive |
US4483569A (en) * | 1981-07-24 | 1984-11-20 | Gulf & Western Manufacturing Company | Sealed ball and socket joints capable of disassembly |
US4426090A (en) * | 1982-09-24 | 1984-01-17 | Halogen Insulator & Seal Corp. | Pressure relief exclusion seal |
US5023733A (en) * | 1985-12-16 | 1991-06-11 | Seiko Epson Corporation | Head positioning control for a spindle motor disk drive |
US4722616A (en) * | 1986-11-10 | 1988-02-02 | General Motors Corporation | Sealed and unitized bearing with economically formed races |
US5046868A (en) * | 1988-11-03 | 1991-09-10 | Ingersoll-Rand Company | Bearing wiper seal |
JP2853337B2 (ja) * | 1990-12-13 | 1999-02-03 | 三菱電機株式会社 | 磁気ディスク装置 |
-
1992
- 1992-07-30 US US07/922,290 patent/US5416657A/en not_active Expired - Lifetime
-
1993
- 1993-03-18 CA CA002091911A patent/CA2091911A1/en not_active Abandoned
- 1993-04-26 TW TW082103213A patent/TW246730B/zh not_active IP Right Cessation
- 1993-06-23 JP JP5151800A patent/JP2592212B2/ja not_active Expired - Fee Related
- 1993-06-30 CN CN93107646A patent/CN1050434C/zh not_active Expired - Fee Related
- 1993-06-30 KR KR93012131A patent/KR970009127B1/ko not_active IP Right Cessation
- 1993-06-30 MY MYPI93001285A patent/MY114355A/en unknown
- 1993-07-15 EP EP93202078A patent/EP0581364A1/en not_active Withdrawn
- 1993-07-15 SG SG1996000403A patent/SG42880A1/en unknown
-
1994
- 1994-09-13 US US08/305,225 patent/US6125007A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3700297A (en) * | 1969-11-24 | 1972-10-24 | Us Federal Aviation Admin | Flexible oscillatory motion bearing seal |
Also Published As
Publication number | Publication date |
---|---|
JP2592212B2 (ja) | 1997-03-19 |
KR940002515A (ko) | 1994-02-17 |
TW246730B (zh) | 1995-05-01 |
US5416657A (en) | 1995-05-16 |
CA2091911A1 (en) | 1994-01-31 |
EP0581364A1 (en) | 1994-02-02 |
SG42880A1 (en) | 1997-10-17 |
KR970009127B1 (en) | 1997-06-05 |
MY114355A (en) | 2002-10-31 |
US6125007A (en) | 2000-09-26 |
CN1122418A (zh) | 1996-05-15 |
JPH0658338A (ja) | 1994-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1050434C (zh) | 对小角度摆动应用中轴承的密封 | |
CN1013613B (zh) | 隔绝式密封装置 | |
CN2818934Y (zh) | 使用磁力的轴承保护密封装置 | |
US20060238914A1 (en) | Formed in place vibration damper or dampers | |
JPH03145956A (ja) | ハードディスク駆動用電動モータ | |
CN102159850B (zh) | 张紧器 | |
JPH1151069A (ja) | ダブルシールベアリング | |
CN1502444A (zh) | 随机轨道式打磨机 | |
CN105626870A (zh) | 一种可双向密封的旋转密封结构 | |
US5132856A (en) | Motor spindle for hard disc device | |
US20060031864A1 (en) | Spindle motor, disc driving apparatus having the same, and production method thereof | |
US6702395B1 (en) | Rotating wing structure of steel wheel | |
US6964521B2 (en) | Compliant linear bearing | |
US6851861B2 (en) | Lubricant retention design for disk drive fluid dynamic bearing spindle motor | |
WO2012018548A1 (en) | Mechanical face seal assembly for bearings | |
JPH07269713A (ja) | 偏心動用耐圧オイルシール | |
RU2472986C2 (ru) | Герметичное направляющее устройство вращения | |
JPH0121213Y2 (zh) | ||
CN1696548A (zh) | 迷宫式托辊密封装置 | |
JPS5868553A (ja) | 軸封装置 | |
JPH10299767A (ja) | スイングアーム用転がり軸受ユニット | |
JPH0988984A (ja) | 転がり軸受のシール装置 | |
JP2004270797A (ja) | 軸受装置、ヘッド支持装置及び記録再生装置 | |
JP5356783B2 (ja) | 除湿ロータの外周シール構造 | |
CN1327578A (zh) | 磁头支承装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: HITACHI GST Free format text: FORMER OWNER: INTERNATIONAL BUSINESS MACHINE CORP. Effective date: 20040108 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20040108 Address after: Amsterdam Patentee after: Hitachi Global Storage Tech Address before: American New York Patentee before: International Business Machines Corp. |
|
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20000315 |