JP3004512B2 - Dynamic pressure bearing device - Google Patents
Dynamic pressure bearing deviceInfo
- Publication number
- JP3004512B2 JP3004512B2 JP5250384A JP25038493A JP3004512B2 JP 3004512 B2 JP3004512 B2 JP 3004512B2 JP 5250384 A JP5250384 A JP 5250384A JP 25038493 A JP25038493 A JP 25038493A JP 3004512 B2 JP3004512 B2 JP 3004512B2
- Authority
- JP
- Japan
- Prior art keywords
- head
- axial
- dynamic pressure
- facing
- shaft
- 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
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- Sliding-Contact Bearings (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、潤滑剤を密封した動
圧軸受装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrodynamic bearing device in which a lubricant is sealed.
【0002】[0002]
【従来の技術】従来、この種の動圧軸受装置としては、
図6に示すように、金属潤滑剤を利用したX線用動圧軸
受装置がある。この装置は回転体60と、この回転体6
0の内側に配置された固定体69とを備え、上記回転体
60と固定体69との間に金属潤滑剤(図示せず)が充填
されている。2. Description of the Related Art Conventionally, as a dynamic bearing device of this kind,
As shown in FIG. 6, there is an X-ray dynamic pressure bearing device using a metal lubricant. This device includes a rotating body 60 and a rotating body 6.
And a fixed body 69 disposed inside the rotating body 60, and a space between the rotating body 60 and the fixed body 69 is filled with a metal lubricant (not shown).
【0003】上記固定体69は円柱形の頭部61とこの
頭部61から鉛直下方に延びる首部65とを有し、上記
回転体60は頭部61の外周を囲む円筒部62とこの円
筒部62の下端に固定されて径方向内方に延びて頭部6
1の下面61bに対向する鍔板63とを有する。そし
て、上記頭部61の外周面61aおよび底面61bには
動圧溝(図示せず)が形成されている。The fixed body 69 has a cylindrical head 61 and a neck 65 extending vertically downward from the head 61. The rotating body 60 includes a cylindrical part 62 surrounding the outer periphery of the head 61 and a cylindrical part 62. 62, which is fixed to the lower end of
1 and a flange plate 63 facing the lower surface 61b. A dynamic pressure groove (not shown) is formed on the outer peripheral surface 61a and the bottom surface 61b of the head 61.
【0004】このX線管用動圧軸受装置は、上記回転体
60の上部にX線管の回転陽極が固定され、回転体60
が固定体69に対して回転すると、上記頭部61の外周
面61a及び底面61bに形成された動圧溝が上記金属
潤滑剤に動圧を発生させて、回転体60を径方向および
軸方向に支持する。In this dynamic pressure bearing device for an X-ray tube, a rotating anode of the X-ray tube is fixed on the rotating body 60, and the rotating body 60
Is rotated with respect to the fixed body 69, the dynamic pressure grooves formed on the outer peripheral surface 61a and the bottom surface 61b of the head 61 generate dynamic pressure on the metal lubricant, and cause the rotating body 60 to move radially and axially. To support.
【0005】[0005]
【発明が解決しようとする課題】ところが、上記従来の
X線管用動圧軸受は、上記回転体60の鍔板63と固定
体69の首部65との間の隙間Gから金属潤滑剤が漏れ
て潤滑不良が生じ、この潤滑不良が短寿命を招くという
問題がある。However, in the conventional dynamic pressure bearing for an X-ray tube, the metal lubricant leaks from the gap G between the flange plate 63 of the rotating body 60 and the neck 65 of the fixed body 69. There is a problem that poor lubrication occurs and this poor lubrication leads to a short life.
【0006】そこで、この発明の目的は、潤滑剤の漏れ
を防止できる,特にX線管用動圧軸受装置に好適に用い
られる動圧軸受装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a dynamic pressure bearing device which can prevent leakage of a lubricant, and is particularly preferably used for a dynamic pressure bearing device for an X-ray tube.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するた
め、この発明のX線管用動圧軸受装置は、有筒外筒部材
と、上記外筒部材と相対回転し外筒部材の内側に配置さ
れる頭部とこの頭部から軸方向に上記外筒部材の外側に
延びる首部とを含む軸体とを備え、上記軸体の頭部に径
方向に対向する上記外筒部材の内周面または上記外筒部
材に径方向に対向する上記軸体の頭部の外周面の少なく
とも一方に径方向支持用動圧発生溝が形成され、上記外
筒部材と軸体との間に潤滑剤が充填された動圧軸受装置
において、上記外筒部材は、上記首部の周囲に位置し上
記軸体の頭部の下部に軸方向に対向する鍔部を有し、上
記鍔部に対向する上記軸体の頭部の軸方向対向面もしく
は上記頭部の軸方向対向面に対向する上記鍔部の軸方向
対向面の少なくとも一方に軸方向支持用動圧発生溝が形
成されており、上記外筒部材の鍔部の軸方向対向面もし
くは上記鍔部に対向する軸体の頭部の軸方向対向面に、
上記首部を囲む軸方向凹部が形成されており、上記鍔部
に対向する軸体の頭部の軸方向対向面もしくは上記外筒
部材の鍔部の軸方向対向面に、上記軸方向凹部に入り込
む軸方向凸部が形成されていることを特徴としている。In order to achieve the above object, a dynamic pressure bearing device for an X-ray tube according to the present invention is provided with a cylindrical outer cylindrical member, and is disposed inside the outer cylindrical member by rotating relative to the outer cylindrical member. An inner peripheral surface of the outer cylinder member radially opposed to the head of the shaft body, the shaft body including a head to be formed and a neck portion extending from the head to the outside of the outer cylinder member in the axial direction. Or a radial support dynamic pressure generating groove is formed on at least one of the outer peripheral surfaces of the head of the shaft radially opposed to the outer cylinder member, and a lubricant is provided between the outer cylinder member and the shaft. In the filled hydrodynamic bearing device, the outer cylinder member has a flange portion located around the neck portion and a lower portion of a head of the shaft body and axially opposed to the shaft portion, and the shaft facing the flange portion. At least an axially facing surface of the head of the body or an axially facing surface of the flange portion facing the axially facing surface of the head; Write and axial support for dynamic pressure generating grooves are formed in the axial direction facing surface of the head of the shaft axially opposite facing surface or the flange portion of the flange portion of the outer tube member,
An axial concave portion surrounding the neck portion is formed, and enters the axial concave portion on an axially facing surface of a head of the shaft body facing the flange portion or an axially facing surface of a flange portion of the outer cylindrical member. It is characterized in that an axial projection is formed.
【0008】[0008]
【作用】例えば、上記外筒部材が回転した場合、外筒部
材の鍔部の軸方向対向面もしくは上記鍔部に対向する軸
体の頭部の軸方向対向面に形成された軸方向凹部に、上
記金属潤滑剤が溜まる。したがって、外筒部材の鍔部と
固定体の首部との間の隙間から金属潤滑剤が漏れること
が防がれる。For example, when the outer cylinder member rotates, an axial recess formed in the axially opposed surface of the flange of the outer cylinder member or the axially opposed surface of the head of the shaft body opposed to the flanged portion. Thus, the metal lubricant accumulates. Therefore, it is possible to prevent the metal lubricant from leaking from the gap between the flange of the outer cylinder member and the neck of the fixed body.
【0009】また、上記軸方向凹部とこの凹部に入り込
む上記軸方向凸部とがラビリンス空間を形成するので、
このラビリンス空間に潤滑剤が保持される。したがっ
て、外筒部材の鍔部と軸体の首部との間の隙間から潤滑
剤が漏れることが防がれる。Further, since the axial concave portion and the axial convex portion entering the concave portion form a labyrinth space,
The lubricant is held in the labyrinth space. Therefore, it is possible to prevent the lubricant from leaking from the gap between the flange of the outer cylinder member and the neck of the shaft.
【0010】また、上記外筒部材が回転すると、上記軸
方向凹部に在る潤滑剤に径方向外側に向かう遠心力が働
くから、上記潤滑剤が径方向外側に向かわせられ、外筒
部材の鍔部と径方向内側の固定体の首部との間の隙間か
ら潤滑剤が漏れることが防がれる。Further, when the outer cylinder member rotates, a centrifugal force acts radially outward on the lubricant in the axial recess, so that the lubricant is directed radially outward, and It is possible to prevent the lubricant from leaking from a gap between the flange portion and the neck portion of the radially inner fixed body.
【0011】[0011]
【実施例】以下、この発明を図示の実施例により詳細に
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
【0012】図1に、この発明の動圧軸受装置の実施例
を示す。この実施例は、本発明を特にX線管用動圧軸受
装置に適用した場合を示し、外筒部材としての円筒形状
の回転体1と、この回転体1に嵌合する軸体としての固
定体4とを備えている。FIG. 1 shows an embodiment of a hydrodynamic bearing device according to the present invention. This embodiment shows a case where the present invention is particularly applied to a dynamic pressure bearing device for an X-ray tube, and includes a cylindrical rotating body 1 as an outer cylindrical member and a fixed body as a shaft fitted to the rotating body 1. 4 is provided.
【0013】上記回転体1は、X線管の回転陽極が固定
される蓋部1bと、円筒形状の筒部1cと、上記筒部1
cの下端に固定された下鍔部2を含んでいる。また、上
記固定体4の中心部には、シャフト状の長細い冷却用孔
13が穿たれている。この固定体4は、上記回転体1の
内側に配置される円柱形の頭部3とこの頭部3から上記
回転体1の外側に鉛直下方に延びる首部5とを含んでい
る。The rotating body 1 comprises a lid 1b to which a rotating anode of an X-ray tube is fixed, a cylindrical tubular portion 1c, and a cylindrical portion 1c.
c includes a lower flange portion 2 fixed to the lower end. Further, a shaft-shaped long and thin cooling hole 13 is formed in the center of the fixed body 4. The fixed body 4 includes a cylindrical head 3 disposed inside the rotating body 1 and a neck 5 extending vertically downward from the head 3 to the outside of the rotating body 1.
【0014】上記頭部3の外周面にはV字形状の複数の
動圧溝6が形成されている。また、上記頭部3の軸方向
の上端面3aには、図1(B)に示すように、V字形状の
複数の動圧溝7が周方向に形成されている。また、上記
頭部3の下部3cの軸方向の下端面3bには、図1(C)
に示すように、V字形状の複数の動圧溝8が動圧溝7と
逆向きに周方向に形成されている。A plurality of V-shaped dynamic pressure grooves 6 are formed on the outer peripheral surface of the head 3. As shown in FIG. 1B, a plurality of V-shaped dynamic pressure grooves 7 are formed in the circumferential direction on the upper end surface 3a of the head 3 in the axial direction. FIG. 1C shows an axial lower end surface 3b of the lower portion 3c of the head 3.
As shown in the figure, a plurality of V-shaped dynamic pressure grooves 8 are formed in the circumferential direction opposite to the dynamic pressure grooves 7.
【0015】そして、上記回転体1は、略鉛直方向に延
びる直線を中心軸として回転させられるようになってお
り、上記回転体1と上記固定体4の頭部3との間には、
金属流体潤滑剤が充填されている。この金属流体潤滑剤
としては、例えばガリウム合金が用いられる。また、上
記固定体4および回転体1はガリウム合金に対する耐食
性を有するタンタルで作製されている。The rotating body 1 is adapted to be rotated about a straight line extending in a substantially vertical direction as a center axis, and between the rotating body 1 and the head 3 of the fixed body 4,
Filled with metal fluid lubricant. As the metal fluid lubricant, for example, a gallium alloy is used. The fixed body 4 and the rotating body 1 are made of tantalum having corrosion resistance to a gallium alloy.
【0016】また、図2および図2を拡大した図3に示
すように、上記頭部3の下端面3bに形成された動圧溝
8の径方向内側には、軸方向上方に穿たれた凹部10が
設けられている。この凹部10は、首部5を取り囲む環
状に形成されている。また、上記下鍔部2には、径方向
の最も内側に凸部11が形成されている。この凸部11
は、上記凹部10内に入り込むように形成されている。
この凸部11は、首部5を取り囲む環状に形成されてい
る。As shown in FIG. 2 and FIG. 3 which is an enlargement of FIG. 2, a radially inner side of a dynamic pressure groove 8 formed in the lower end surface 3b of the head 3 is drilled upward in the axial direction. A recess 10 is provided. The recess 10 is formed in an annular shape surrounding the neck 5. The lower flange 2 has a radially innermost convex portion 11. This convex part 11
Is formed so as to enter the recess 10.
The protrusion 11 is formed in an annular shape surrounding the neck 5.
【0017】上記構成のX線管用動圧軸受装置は、真空
容器の内部に設けられる。そして、上記回転体1が回転
すると、固定体4の頭部3の外周面に形成された動圧溝
6が上記金属流体潤滑剤に径方向の動圧を発生させて、
回転体1を径方向に支持する。同時に、上記頭部3の軸
方向の両端面3a,3bに形成された動圧溝7,8が上
記金属流体潤滑剤に軸方向の動圧を発生させて、回転体
1を軸方向に支持する。The dynamic pressure bearing device for an X-ray tube having the above structure is provided inside a vacuum vessel. When the rotating body 1 rotates, the dynamic pressure groove 6 formed on the outer peripheral surface of the head 3 of the fixed body 4 generates a radial dynamic pressure in the metal fluid lubricant,
The rotating body 1 is supported in the radial direction. At the same time, the dynamic pressure grooves 7, 8 formed in the axial end surfaces 3a, 3b of the head 3 generate an axial dynamic pressure in the metal fluid lubricant, thereby supporting the rotating body 1 in the axial direction. I do.
【0018】このとき、図3に示すように、動圧溝8が
発生する動圧によって径方向内側に向かう金属流体潤滑
剤Xを、凹部10に溜めることができるから、回転体1
と固定体4との間の隙間Sから上記金属流体潤滑剤Zが
漏れることを防ぐことができる。At this time, as shown in FIG. 3, the metal fluid lubricant X flowing inward in the radial direction can be stored in the concave portion 10 by the dynamic pressure generated by the dynamic pressure groove 8.
The metal fluid lubricant Z can be prevented from leaking from the gap S between the metal fluid lubricant and the fixed body 4.
【0019】また、上記凹部10とこの凹部10に入り
込んだ凸部11とがラビリンス空間を形成するので、こ
のラビリンス空間に上記金属流体潤滑剤Zを保持でき
る。したがって、回転体1と固定体4との隙間Sから上
記金属流体潤滑剤Zが漏れることを防止できる。Since the concave portion 10 and the convex portion 11 having entered the concave portion 10 form a labyrinth space, the metal fluid lubricant Z can be held in the labyrinth space. Therefore, it is possible to prevent the metal fluid lubricant Z from leaking from the gap S between the rotating body 1 and the fixed body 4.
【0020】また、上記回転体1が回転すると、上記凹
部10に在る金属流体潤滑剤Zに径方向外側に向かう遠
心力が働くから、上記金属流体潤滑剤Zが径方向外側に
向かわせられ、径方向内側の隙間Sから金属流体潤滑剤
Zが漏れることを防止できる。When the rotating body 1 rotates, a centrifugal force acts radially outward on the metal fluid lubricant Z in the concave portion 10, so that the metal fluid lubricant Z is directed radially outward. In addition, the metal fluid lubricant Z can be prevented from leaking from the radially inner gap S.
【0021】したがって、この実施例によれば、金属流
体潤滑剤の漏れを効果的に防ぐことができ、潤滑不良を
防ぐことができ、長寿命化を図ることができる。Therefore, according to this embodiment, leakage of the metal fluid lubricant can be effectively prevented, poor lubrication can be prevented, and the life can be extended.
【0022】尚、上記実施例において、図5に示す上記
凹部10の径方向外側周面と上記凸部11との間の距離
aをできるだけ大きくし、上記凸部11と上記凹部10
の径方向内側周面との間の距離bをできるだけ小さくし
た方が、上記金属流体潤滑剤の漏れを防止する効果を大
きくできる。In the above embodiment, the distance a between the radially outer peripheral surface of the concave portion 10 and the convex portion 11 shown in FIG.
The effect of preventing the leakage of the metal fluid lubricant can be increased by making the distance b between the metal fluid lubricant and the radially inner peripheral surface as small as possible.
【0023】また、上記実施例では、上記凸部11の断
面を方形状にしたが、図4(A)に示すように、断面が先
細の三角形状の凸部41にしてもよい。また、図4(B)
に示すように、径方向外側に折れ曲がったかぎ形断面の
凸部42にしてもよい。Further, in the above embodiment, the cross section of the convex portion 11 is square, but it may be a triangular convex portion 41 having a tapered cross section as shown in FIG. FIG. 4 (B)
As shown in FIG. 7, the projection 42 may have a hook-shaped cross section bent radially outward.
【0024】また、上記実施例では、凹部10を頭部3
に形成し凸部11を下鍔部2に形成したが、凹部10を
下鍔部2に形成し凸部11を頭部3に形成してもよい。In the above embodiment, the recess 10 is
Although the convex portion 11 is formed on the lower flange portion 2, the concave portion 10 may be formed on the lower flange portion 2 and the convex portion 11 may be formed on the head portion 3.
【0025】また、上記実施例では、回転体1の筒部1
cと下鍔部2とを別体としたが筒部1cと下鍔部2とを
一体に形成してもよい。さらにまた、上記実施例では、
外筒部材が回転側とし、軸体を固定側としているが、軸
体を回転側とし外筒部材を固定側としてもよい。また、
ガリウムあるいはガリウム合金でなる金属潤滑剤に代
え、低揮発性の真空用グリースの使用も可能である。ま
た、本発明は、X線管に限らず他の真空装置にも適用可
能であり、粘性の高い潤滑剤であれば、通常の大気中で
用いられる軸受装置にも適用できる。In the above embodiment, the cylinder 1 of the rotating body 1
Although the c and the lower flange 2 are separate bodies, the cylindrical portion 1c and the lower flange 2 may be formed integrally. Furthermore, in the above embodiment,
Although the outer cylinder member is on the rotation side and the shaft body is on the fixed side, the shaft body may be on the rotation side and the outer cylinder member may be on the fixed side. Also,
Instead of a metal lubricant made of gallium or a gallium alloy, a low-volatility vacuum grease can be used. Further, the present invention is applicable not only to the X-ray tube but also to other vacuum devices, and can be applied to a bearing device used in a normal atmosphere as long as the lubricant has a high viscosity.
【0026】[0026]
【発明の効果】以上より明らかなように、この発明の動
圧軸受装置は、有底外筒部材は、軸体の頭部の下部に鉛
直下方から軸方向に対向する鍔部を有し、上記鍔部に対
向する上記軸体の頭部の軸方向対向面もしくは上記頭部
の軸方向対向面に対向する上記鍔部の軸方向対向面の少
なくとも一方に軸方向支持用動圧発生溝が形成されてお
り、上記有底外筒部材の鍔部の軸方向対向面もしくは上
記鍔部に対向する軸体の頭部の軸方向対向面に、上記首
部を囲む軸方向凹部が形成されており、上記鍔部に対向
する軸体の頭部の軸方向対向面もしくは上記有底外筒部
材の鍔部の軸方向対向面に、上記軸方向凹部に入り込む
軸方向凸部が形成されているものである。As is clear from the above, in the dynamic pressure bearing device of the present invention, the bottomed outer cylinder member has a flange portion which is opposed to the axial direction from below vertically below the head of the shaft body, An axial supporting dynamic pressure generating groove is provided on at least one of the axially facing surface of the head of the shaft body facing the flange and the axially facing surface of the flange facing the axially facing surface of the head. An axial concave portion surrounding the neck portion is formed on the axially facing surface of the flange portion of the bottomed outer cylindrical member or the axially facing surface of the head of the shaft body facing the flange portion. An axially convex portion that enters the axially concave portion is formed on an axially facing surface of the head of the shaft body that faces the flange portion or an axially facing surface of the flange portion of the bottomed outer cylindrical member. It is.
【0027】したがって、この発明の動圧軸受装置は、
上記軸方向凹部に、潤滑剤を溜めて、有底外筒部材の鍔
部と軸体の首部との間の隙間から金属潤滑剤が漏れるこ
とを防止できる。Therefore, the dynamic pressure bearing device of the present invention
Lubricant is stored in the axial recess, and leakage of the metal lubricant from the gap between the flange of the bottomed outer cylindrical member and the neck of the shaft can be prevented.
【0028】また、上記軸方向凹部とこの凹部に入り込
む上記軸方向凸部とがラビリンス空間を形成するので、
このラビリンス空間に潤滑剤を保持できる。したがっ
て、有底外筒部材の鍔部と軸体の首部との間の隙間から
潤滑剤が漏れることを防止できる。Further, since the axial concave portion and the axial convex portion entering the concave portion form a labyrinth space,
The lubricant can be held in the labyrinth space. Therefore, it is possible to prevent the lubricant from leaking from the gap between the flange of the bottomed outer cylindrical member and the neck of the shaft.
【0029】また、上記有底外筒部材が回転すると、上
記軸方向凹部に在る潤滑剤に径方向外側に向かう遠心力
が働くから、上記潤滑剤が径方向外側に向かわせられて
有底外筒部材の鍔部と径方向内側の軸体の首部との間の
隙間から潤滑剤が漏れることを防止できる。Further, when the bottomed outer cylindrical member rotates, a centrifugal force acts on the lubricant present in the axial recess toward the outside in the radial direction. It is possible to prevent the lubricant from leaking from a gap between the flange portion of the outer cylinder member and the neck portion of the radially inner shaft.
【図1】 図1(A)はこの発明のX線管用動圧軸受装置
の実施例の断面図であり、図1(B)は上記実施例の固定
体の上面に形成された動圧溝の平面図であり、図1(C)
は上記実施例の固定体の下面に形成された動圧溝の平面
図である。FIG. 1A is a sectional view of an embodiment of a dynamic pressure bearing device for an X-ray tube according to the present invention, and FIG. 1B is a dynamic pressure groove formed on an upper surface of a fixed body of the above embodiment. FIG. 1C is a plan view of FIG.
FIG. 4 is a plan view of a dynamic pressure groove formed on a lower surface of the fixed body of the embodiment.
【図2】 上記実施例の要部部分断面図である。FIG. 2 is a partial sectional view of a main part of the embodiment.
【図3】 上記実施例の要部拡大断面図である。FIG. 3 is an enlarged sectional view of a main part of the embodiment.
【図4】 上記実施例の回転体の下鍔部に形成する凸部
の変形例を示す断面図である。FIG. 4 is a cross-sectional view showing a modified example of the convex portion formed on the lower flange portion of the rotating body of the embodiment.
【図5】 上記実施例の凸部と凹部との間の寸法a,b
を示す図である。FIG. 5 shows dimensions a and b between the convex portion and the concave portion in the above embodiment.
FIG.
【図6】 従来のX線管用動圧軸受装置の要部断面図で
ある。FIG. 6 is a sectional view of a main part of a conventional dynamic pressure bearing device for an X-ray tube.
1…回転体、1b…蓋部、2…下鍔部、3…頭部、3a
…上端面、3b…下端面、4…固定体、5…首部、6,
7,8…動圧溝、9…外径部、10…凹部、11…凸
部、Z…金属流体潤滑剤。DESCRIPTION OF SYMBOLS 1 ... Rotating body, 1b ... Cover part, 2 ... Lower flange part, 3 ... Head, 3a
... top end surface, 3b ... bottom end surface, 4 ... fixed body, 5 ... neck, 6,
7, 8: dynamic pressure groove, 9: outer diameter portion, 10: concave portion, 11: convex portion, Z: metal fluid lubricant.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F16C 17/10 F16C 33/74 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) F16C 17/10 F16C 33/74
Claims (1)
転し外筒部材の内側に配置される頭部とこの頭部から軸
方向に上記外筒部材の外側に延びる首部とを含む軸体と
を備え、上記軸体の頭部に径方向に対向する上記外筒部
材の内周面または上記外筒部材に径方向に対向する上記
軸体の頭部の外周面の少なくとも一方に径方向支持用動
圧発生溝が形成され、上記外筒部材と軸体との間に潤滑
剤が充填された動圧軸受装置において、 上記外筒部材は、上記首部の周囲に位置し上記軸体の頭
部の下部に軸方向に対向する鍔部を有し、 上記鍔部に対向する上記軸体の頭部の軸方向対向面もし
くは上記頭部の軸方向対向面に対向する上記鍔部の軸方
向対向面の少なくとも一方に軸方向支持用動圧発生溝が
形成されており、 上記外筒部材の鍔部の軸方向対向面もしくは上記鍔部に
対向する軸体の頭部の軸方向対向面に、上記首部を囲む
軸方向凹部が形成されており、 上記鍔部に対向する軸体の頭部の軸方向対向面もしくは
上記外筒部材の鍔部の軸方向対向面に、上記軸方向凹部
に入り込む軸方向凸部が形成されていることを特徴とす
る動圧軸受装置。1. A bottomed outer cylinder member, a head which rotates relative to the outer cylinder member and is disposed inside the outer cylinder member, and a neck portion which extends from the head to the outside of the outer cylinder member in an axial direction. And at least one of an inner peripheral surface of the outer cylindrical member radially opposed to the head of the shaft or an outer peripheral surface of a head of the shaft radially opposed to the outer cylindrical member. A dynamic pressure generating groove for radial direction support is formed in the bearing, and a lubricant is filled between the outer cylinder member and the shaft body; the outer cylinder member is located around the neck portion; A lower portion of the head of the shaft body having a flange portion facing in the axial direction, the flange facing the axial direction facing surface of the head portion of the shaft body facing the flange portion or the flange facing the axial direction facing surface of the head portion; An axial supporting dynamic pressure generating groove is formed on at least one of the axially opposing surfaces of the outer cylindrical member; An axial concave portion surrounding the neck portion is formed on the facing surface or the axial facing surface of the head of the shaft facing the flange portion, and the axial facing surface of the head portion of the shaft facing the flange portion. Alternatively, a dynamic pressure bearing device, wherein an axial convex portion that enters the axial concave portion is formed on an axially opposed surface of the flange portion of the outer cylindrical member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5250384A JP3004512B2 (en) | 1993-10-06 | 1993-10-06 | Dynamic pressure bearing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5250384A JP3004512B2 (en) | 1993-10-06 | 1993-10-06 | Dynamic pressure bearing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07103227A JPH07103227A (en) | 1995-04-18 |
JP3004512B2 true JP3004512B2 (en) | 2000-01-31 |
Family
ID=17207122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5250384A Expired - Fee Related JP3004512B2 (en) | 1993-10-06 | 1993-10-06 | Dynamic pressure bearing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3004512B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007016884A (en) * | 2005-07-07 | 2007-01-25 | Ge Medical Systems Global Technology Co Llc | Bearing mechanism, and x-ray tube |
JP5718090B2 (en) * | 2011-02-22 | 2015-05-13 | サムスン電機ジャパンアドバンスドテクノロジー株式会社 | Rotating equipment |
-
1993
- 1993-10-06 JP JP5250384A patent/JP3004512B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07103227A (en) | 1995-04-18 |
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