JPS6059660B2 - magnetic disk storage device - Google Patents
magnetic disk storage deviceInfo
- Publication number
- JPS6059660B2 JPS6059660B2 JP55172673A JP17267380A JPS6059660B2 JP S6059660 B2 JPS6059660 B2 JP S6059660B2 JP 55172673 A JP55172673 A JP 55172673A JP 17267380 A JP17267380 A JP 17267380A JP S6059660 B2 JPS6059660 B2 JP S6059660B2
- Authority
- JP
- Japan
- Prior art keywords
- disk
- container
- magnetic disk
- storage device
- disk storage
- 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
Links
Description
【発明の詳細な説明】 本発明は磁気ディスク記憶装置の改良に関する。[Detailed description of the invention] The present invention relates to improvements in magnetic disk storage devices.
現在計算機の外部メモリとして広く用いられている磁
気ディスク装置は年々高密度化が成されており記憶容量
も増加している。Magnetic disk drives, which are currently widely used as external memory for computers, are becoming more dense and have an increasing storage capacity year by year.
しかしながら高密度化に伴い熱的に種々の問題かあり
、とりわけ装置内部の温度上昇に伴う磁気ディスクを含
む各部の熱膨張によりオフトラック（データヘッドの位
置ずれ）の発生はトラック方向記録密度の高密度化に大
きな障害となつている。However, with increasing density, there are various thermal problems.In particular, off-track (misalignment of the data head) occurs due to thermal expansion of various parts including the magnetic disk due to the rise in temperature inside the device. This is a major obstacle to increasing density.
この温度上昇の主な原因は空気とディスクの粘性摩擦（
風損）である。 またこれと共に、これらの装置ではヘ
ッドスライダがディスク面上を１μｍ以内という至近距
離に浮上しており、この浮上高さも高密度化するに伴い
小さくする必要があり、内部の清浄度も一層要求される
ため、温度上昇を避けるために開放することも不可能で
ある。The main cause of this temperature rise is the viscous friction between the air and the disk (
windage). In addition, in these devices, the head slider flies above the disk surface at a close distance of within 1 μm, and as the density increases, this flying height must also be reduced, and internal cleanliness is also required. Therefore, it is impossible to open it to avoid a rise in temperature.
従来これらの発熱対策としては通常のディスク（１４
″φ）を用い、外部ブロアとアブソリユートフイルタに
より開放型空気循環系を構成して発生した熱を放散せし
めるか、あるいはディスク径を一層小さくして（例えば
８″φ）発生する風損そのものを減らし、空気は完全密
封に近い系としたもの等があつた。Conventionally, as a countermeasure against heat generation, ordinary disks (14
``φ) to dissipate the generated heat by constructing an open air circulation system with an external blower and an absolute filter, or by making the disk diameter even smaller (e.g. 8''φ) to reduce the windage loss itself. There were some systems that reduced the amount of air and made the air almost completely sealed.
前者は主としてディスクパック、ヘッドディスクアセン
ブリ（ＨＤＡ）等の大型装置に、後者は最近の小型装置
に多く見られる。 これらを比較すると先に述べたゴミ
の問題、あるいは装置が小型になるという点では後者の
完全密封型が有利であるが、一層記憶容量を増加しよう
とする場合には小径ディスクでは限界がある。従つて本
発明の目的は大口径ディスクを用いても外部ブロアは不
要で、かつ温度上昇も少くより高密度記憶が可能な磁気
ディスク装置を提供することにある。 このため本発明
においては、１枚貝上の情報記録用円板及びそれを回転
させる駆動部と、情報記録用円板の情報を読出す磁気ヘ
ッド及びそのアクセス用駆動部とを具備し、完全密閉さ
れた容器に収容された磁気ディスク記憶装置において、
容器内部の空気を排除し、ヘリウム又は水素を充填した
ことを特徴とするものである。The former is mainly found in large devices such as disk packs and head disk assemblies (HDAs), and the latter is often found in recent small devices. Comparing these, the latter fully sealed type is advantageous in terms of the dust problem mentioned above and the ability to make the device more compact, but small-diameter disks have a limit when trying to further increase storage capacity. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a magnetic disk device that does not require an external blower even when using a large diameter disk, has less temperature rise, and is capable of higher density storage. For this reason, the present invention is equipped with a disk for information recording on a monovalve, a drive unit for rotating it, a magnetic head for reading information from the disk for information recording, and a drive unit for accessing the disk. In a magnetic disk storage device housed in a sealed container,
It is characterized by excluding the air inside the container and filling it with helium or hydrogen.
以下、添付図面に基づいて本発明の実施例につき詳細
に説明する。Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.
図において符号１は情報を記録する記録用円板、２は
記録用円板に回転を伝えるスピンドル、３は記録円板を
回転駆動するモータ、４は記録円板に記録された情報を
読取る磁気ヘッド、５は磁気ヘッドの支持部、６は該支
持部を移動せしめる駆動部、７はフィルタ、８は圧力調
整板、９は密閉容器である。In the figure, 1 is a recording disk for recording information, 2 is a spindle that transmits rotation to the recording disk, 3 is a motor that rotates the recording disk, and 4 is a magnet that reads information recorded on the recording disk. 5 is a support section for the magnetic head; 6 is a drive section for moving the support section; 7 is a filter; 8 is a pressure adjustment plate; 9 is a sealed container.
そして密閉容器９の内部は空気を排除し、その代りにヘ
リウム又は水素が充填されている。なお符号１０はスピ
ンドル２の軸受部をシールするための磁性流体シールで
ある。このように構成された本実施例は次の如き利点を
有する。Air is excluded from the inside of the closed container 9, and instead it is filled with helium or hydrogen. Note that the reference numeral 10 is a magnetic fluid seal for sealing the bearing portion of the spindle 2. This embodiment configured in this manner has the following advantages.
その第１は風損が減じ、そのため温度上昇が減少するこ
とである。一般に容器内部で記録用円板か１枚てある場
合の風損（但し乱流の場合）は次式で表わされる。（１
）式より記録用円板の直径を小さくする場合の風損は半
径Ｒ（７）曾乗に比例するため非常に効果があることが
わかるが本実施例では流体の種類を変え、即ちρν１１
５を変えることになる。The first is that windage losses are reduced and therefore temperature rise is reduced. Generally, the windage loss (in the case of turbulent flow) when there is only one recording disk inside the container is expressed by the following equation. (1
), it can be seen that reducing the diameter of the recording disk is very effective because the windage loss is proportional to the radius R(7) raised to the power of ρν11.
5 will be changed.
次表は代表的な気体のＯ℃における諸特性（特性値は何
れも空気を基準にして無次元化されている。）を示した
ものであるが、これにより明らかなように風損では水素
が空気の１１１０、ヘリウムでは空気の１１？度である
。この値は温度上昇に関してもほぼ同様と考えて良い。
このように風損及び温度上昇の点からは水素が圧倒的に
有利であり、水素を用いれば記録円板は１４″径であり
ながら８″径とほぼ同程度の風損にすることができる。The following table shows the characteristics of typical gases at 0°C (all characteristic values are dimensionless with air as the standard). is 1110 for air, and 11 for helium? degree. This value can be considered to be almost the same regarding temperature rise.
In this way, hydrogen is overwhelmingly advantageous in terms of windage loss and temperature rise, and by using hydrogen, a recording disk with a diameter of 14" can have almost the same windage loss as an 8" diameter. .
第２の利点は水素及びヘリウム共熱伝導率が空−気に比
して遥かに良いため、内部の温度差をなくす点でも効果
が期待できることである。第３は容器が完全密閉である
ため当初十分に乾燥させた流体を封入しておけば、後は
結露の恐れがなく、磁気ヘッドの吸着等に対して有利で
ある。The second advantage is that the co-thermal conductivity of hydrogen and helium is much better than that of air, so it can be expected to be effective in eliminating internal temperature differences. Third, since the container is completely airtight, if a sufficiently dried fluid is initially filled, there is no risk of condensation afterward, which is advantageous for attracting magnetic heads, etc.
本発明は以上の如き利点を有するが、水素、ヘリウム共
、平均自由行程が長く非常にリークし易いことを考慮す
る必要がある。Although the present invention has the above-mentioned advantages, it is necessary to take into account that both hydrogen and helium have long mean free paths and are extremely susceptible to leakage.
シールの上で最大の問題は回転軸のシーである。この場
合従来のラビリンスやメカニカルシール等では性能上不
可であり、本実施例では磁性流体シールを軸受上部に用
いている。これは真空装置のシールに用いられるもので
この程度の圧力ではほぼ完全なシールが可能である。こ
のシールにより軸受から外は完全に絶縁されているため
グリスの飛散などは全く問題ない。更に駆動モータ３も
外気から密閉すれば門より安全となる。また本発明は完
全密閉したため周囲温度の変化あるいは圧力変化により
容器９の内外部に圧力差を生じリークし易くなるのを防
止するため実施例においては圧力調整板８を設けている
。これはベローズを用いて内外圧力差によりｊ自由に変
形して圧力差を減小せしめることができるようになつて
いる。それと共に容器９にも十分な剛性をもたせ、その
フランジ部にはＯ−リング１１を挿入して十分な締付力
により押圧してシールを完全なものとしている。またフ
ィルタ７は容器９が完全密閉であつても磁気ヘッドのＣ
ＳＳ（コンタクト●スタート●ストップ）等でゴミが発
生する可能性があるため容器上部に取付けられたもので
ある。The biggest problem with seals is the seal on the rotating shaft. In this case, conventional labyrinths, mechanical seals, etc. are not suitable for performance reasons, and in this embodiment, a magnetic fluid seal is used in the upper part of the bearing. This is used for sealing vacuum equipment, and almost perfect sealing is possible with this level of pressure. This seal completely insulates the outside of the bearing, so there is no problem with grease scattering. Furthermore, if the drive motor 3 is also sealed from the outside air, it will be safer than a gate. Furthermore, since the present invention is completely sealed, a pressure regulating plate 8 is provided in the embodiment in order to prevent a pressure difference between the inside and outside of the container 9 from occurring due to a change in ambient temperature or a change in pressure, which is likely to cause leakage. This uses a bellows to freely deform due to the pressure difference between the inside and outside, thereby reducing the pressure difference. At the same time, the container 9 is also provided with sufficient rigidity, and an O-ring 11 is inserted into the flange portion and pressed with sufficient tightening force to complete the seal. Furthermore, even if the container 9 is completely sealed, the filter 7 is
This is installed at the top of the container because SS (Contact Start Stop) etc. may generate dust.
以上説明した如く本発明の磁気ディスク記憶装置は、外
部ブ七アを用いずとも大口径の記録用円板を用いること
ができ、また高速回転でも温度上昇の十分低い装置の実
現を可能とし、より高密度、大容量化を可能とするもの
である。As explained above, the magnetic disk storage device of the present invention can use a large-diameter recording disk without using an external disk drive, and can realize a device with sufficiently low temperature rise even at high speed rotation. This enables higher density and larger capacity.
図は本発明にかかる実施例の磁気ディスク記憶装置の断
面図てある。
１・・・・・・記録用円板、２・・・・・・スピンドル
、３・・・・記録用円板の駆動モータ、４・・・・・・
磁気ヘッド、５・・・・・磁気ヘッドの支持部、６・・
・・・・磁気ヘッドの駆動部、７・・・・・・フィルタ
、８・・・・・・圧力調整板、９・・・・・・密閉容器
、１０・・・・・・磁性流体シール、１１・・・・０−
リング。The figure is a sectional view of a magnetic disk storage device according to an embodiment of the present invention. 1...Recording disc, 2...Spindle, 3...Recording disc drive motor, 4...
Magnetic head, 5... Magnetic head support part, 6...
...Magnetic head drive unit, 7...Filter, 8...Pressure adjustment plate, 9...Airtight container, 10...Magnetic fluid seal , 11...0-
ring.
Claims (1)
動部と、情報記録用円板の情報を読出す磁気ヘッド及び
そのアクセス用駆動部とを具備し、完全密閉された容器
に収容された磁気ディスク記憶装置において、容器内部
の空気を排除し、ヘリウム又は水素を充填したことを特
徴とする磁気ディスク記憶装置。1. It is equipped with one or more information recording discs, a drive unit for rotating them, a magnetic head for reading information from the information recording discs, and a drive unit for accessing the discs, and is housed in a completely sealed container. 1. A magnetic disk storage device characterized in that the air inside the container is removed and the container is filled with helium or hydrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55172673A JPS6059660B2 (en) | 1980-12-09 | 1980-12-09 | magnetic disk storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55172673A JPS6059660B2 (en) | 1980-12-09 | 1980-12-09 | magnetic disk storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5798164A JPS5798164A (en) | 1982-06-18 |
| JPS6059660B2 true JPS6059660B2 (en) | 1985-12-26 |
Family
ID=15946243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55172673A Expired JPS6059660B2 (en) | 1980-12-09 | 1980-12-09 | magnetic disk storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6059660B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9705137B2 (en) | 2011-01-27 | 2017-07-11 | Mitsubishi Rayon Co., Ltd. | Porous electrode substrate, method for manufacturing same, precursor sheet, membrane electrode assembly, and polymer electrolyte fuel cell |
| US9716278B2 (en) | 2012-03-30 | 2017-07-25 | Mitsubishi Chemical Corporation | Porous electrode base material, method for manufacturing same, and precursor sheet |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5952482A (en) * | 1982-09-16 | 1984-03-27 | Nec Corp | Magnetic disc device |
| US4626941A (en) * | 1983-05-26 | 1986-12-02 | Fujitsu Limited | Method and apparatus for suppressing the evaporation of lubricant film coated on magnetic disks of a disk storage |
| US6392838B1 (en) * | 1999-03-30 | 2002-05-21 | Maxtor Corporation | Hermetically sealed data storage device |
| JP4358700B2 (en) | 2004-07-28 | 2009-11-04 | ヒタチグローバルストレージテクノロジーズネザーランドビーブイ | Disk device and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238908A (en) * | 1975-09-23 | 1977-03-25 | Nec Corp | Magnetic disk device |
| JPS5331791U (en) * | 1976-08-25 | 1978-03-18 | ||
| JPS5597797A (en) * | 1979-01-22 | 1980-07-25 | Sansui Electric Co | Speaker system |
| JPS5733465A (en) * | 1980-07-31 | 1982-02-23 | Nec Corp | Magnetic disk device |
| JPS57113472A (en) * | 1980-12-24 | 1982-07-14 | Ibm | Sealing type disk device |
-
1980
- 1980-12-09 JP JP55172673A patent/JPS6059660B2/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238908A (en) * | 1975-09-23 | 1977-03-25 | Nec Corp | Magnetic disk device |
| JPS5331791U (en) * | 1976-08-25 | 1978-03-18 | ||
| JPS5597797A (en) * | 1979-01-22 | 1980-07-25 | Sansui Electric Co | Speaker system |
| JPS5733465A (en) * | 1980-07-31 | 1982-02-23 | Nec Corp | Magnetic disk device |
| JPS57113472A (en) * | 1980-12-24 | 1982-07-14 | Ibm | Sealing type disk device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9705137B2 (en) | 2011-01-27 | 2017-07-11 | Mitsubishi Rayon Co., Ltd. | Porous electrode substrate, method for manufacturing same, precursor sheet, membrane electrode assembly, and polymer electrolyte fuel cell |
| US9716278B2 (en) | 2012-03-30 | 2017-07-25 | Mitsubishi Chemical Corporation | Porous electrode base material, method for manufacturing same, and precursor sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5798164A (en) | 1982-06-18 |
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