JP2604691Y2 - Static pressure air bearing device - Google Patents
Static pressure air bearing deviceInfo
- Publication number
- JP2604691Y2 JP2604691Y2 JP1992059750U JP5975092U JP2604691Y2 JP 2604691 Y2 JP2604691 Y2 JP 2604691Y2 JP 1992059750 U JP1992059750 U JP 1992059750U JP 5975092 U JP5975092 U JP 5975092U JP 2604691 Y2 JP2604691 Y2 JP 2604691Y2
- Authority
- JP
- Japan
- Prior art keywords
- flange portion
- air bearing
- air
- radial
- rotating 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 - Lifetime
Links
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、例えば、紡績機械に用
いられるエアスピンドル等の静圧空気軸受装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrostatic air bearing device such as an air spindle used in a spinning machine.
【０００２】[0002]
【従来の技術】従来、この種の静圧空気軸受装置として
は、図３に示すものがある。この静圧空気軸受装置は、
フランジ部３２を有する回転軸３１と、上記フランジ部
３２のアキシャル方向の外側位置で、回転軸３１の外周
およびフランジ部３２の側面３２a に僅かの隙間を隔て
て対向し、上記回転軸３１の外周にエアを吹き付ける静
圧空気軸受３３とを備えている。上記静圧空気軸受装置
は、静圧空気軸受３３のノズル３３a から回転軸３１の
外周にエアを吹き付けることによって、上記回転軸３１
をラジアル方向に支持すると共に、上記外周に吹き付け
たエアが上記フランジ部３２の側面３２a に沿って流出
し、この流出するエアによって、上記回転軸３２をアキ
シャル方向に支持する。2. Description of the Related Art Conventionally, as this type of hydrostatic air bearing device, there is one shown in FIG. This static pressure air bearing device
The rotating shaft 31 having the flange portion 32 is opposed to the outer periphery of the rotating shaft 31 and the side surface 32 a of the flange portion 32 at a position axially outside the flange portion 32 with a slight gap therebetween. And a static pressure air bearing 33 for blowing air to the air. The static pressure air bearing device blows air from the nozzle 33a of the static pressure air bearing 33 to the outer periphery of the rotary shaft 31 to thereby rotate the rotary shaft 31.
Is supported in the radial direction, and the air blown to the outer periphery flows out along the side surface 32a of the flange portion 32, and the flowing air supports the rotary shaft 32 in the axial direction.
【０００３】[0003]
【考案が解決しようとする課題】しかしながら、上記従
来の静圧空気軸受装置は、上記回転軸３１がアキシャル
方向に移動すると上記フランジ部３２の側面３２a と上
記静圧空気軸受装置３３の側面３３b との間のエア圧が
急激に変動するため、回転軸３１にアキシャル方向の自
励振動が生じ易いという問題がある。However, in the above-described conventional hydrostatic air bearing device, when the rotating shaft 31 moves in the axial direction, the side surface 32a of the flange portion 32 and the side surface 33b of the hydrostatic air bearing device 33 come into contact with each other. In this case, there is a problem that the self-excited vibration in the axial direction is easily generated on the rotating shaft 31 because the air pressure fluctuates rapidly.
【０００４】そこで、本考案の目的は、上記回転軸のア
キシャル方向の自励振動を抑えることができる静圧空気
軸受装置を提供することにある。Accordingly, an object of the present invention is to provide a hydrostatic air bearing device capable of suppressing self-excited vibration of the rotating shaft in the axial direction.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本考案の静圧空気軸受装置は、フランジ部を有する
回転軸と、上記フランジ部のアキシャル方向の外側位置
で、回転軸の外周およびフランジ部の側面に僅かの隙間
を隔てて対向し、上記回転軸の外周にエアを吹き付ける
静圧空気軸受とを備えて、上記回転軸に向けて吹き付け
たエアによって、上記回転軸をラジアル方向に支持する
と共に、上記フランジ部の側面に沿って流出するエアに
よって、上記回転軸をアキシャル方向に支持する静圧空
気軸受装置において、上記フランジ部の側面または上記
フランジ部の側面に対向する静圧空気軸受の側面の少な
くとも一方に、上記静圧空気軸受の側面の径方向内端の
径方向位置から上記フランジ部の側面の径方向外端の径
方向位置に亘っている径方向溝を設けたことを特徴とし
ている。In order to achieve the above object, a hydrostatic air bearing device according to the present invention comprises: a rotating shaft having a flange portion; and an outer peripheral portion of the rotating shaft at an axially outer position of the flange portion. A static pressure air bearing that opposes the side surface of the flange portion with a slight gap therebetween and blows air to the outer periphery of the rotating shaft, and the air that is blown toward the rotating shaft causes the rotating shaft to move in the radial direction. In a hydrostatic air bearing device that supports and supports the rotating shaft in the axial direction by air that flows along the side surface of the flange portion, the static pressure air that faces the side surface of the flange portion or the side surface of the flange portion. At least one of the side surfaces of the bearing extends from the radial position of the radial inner end of the side surface of the hydrostatic air bearing to the radial position of the radial outer end of the side surface of the flange portion. It is characterized in that a radial groove.
【０００６】[0006]
【作用】上記構成によれば、上記フランジ部の側面また
は上記フランジ部の側面に対向する静圧空気軸受の側面
の少なくとも一方に設けた径方向溝が、上記静圧空気軸
受の側面の径方向内端の径方向位置から上記フランジ部
の側面の径方向外端の径方向位置に亘っている。このた
め、上記径方向溝が、上記フランジ部の側面と上記静圧
空気軸受の側面との間のエア圧の急激な変動に起因する
回転軸の軸方向の自励振動を抑え、回転軸がスムーズに
回転するようになる。According to the above construction, the radial groove provided on at least one of the side surface of the flange portion or the side surface of the hydrostatic air bearing opposed to the side surface of the flange portion is formed in the radial direction of the side surface of the hydrostatic air bearing. It extends from the radial position of the inner end to the radial position of the radial outer end of the side surface of the flange portion. For this reason, the radial groove suppresses the self-excited vibration in the axial direction of the rotating shaft caused by a sudden change in the air pressure between the side surface of the flange portion and the side surface of the hydrostatic air bearing. It comes to rotate smoothly.
【０００７】[0007]
【実施例】以下、この考案を図示の実施例により詳細に
説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
【０００８】図１に、本考案の静圧空気軸受装置の実施
例を示す。この実施例は、フランジ部２を有する回転軸
１と、上記フランジ部２のアキシャル方向の外側位置
で、回転軸１の外周およびフランジ部２の側面２a に僅
かの隙間を隔てて対向し、上記回転軸１の外周に、ノズ
ル孔３b および５b からエアを吹き付ける静圧空気軸受
３および５を備えている。FIG. 1 shows an embodiment of the hydrostatic air bearing device of the present invention. In this embodiment, a rotary shaft 1 having a flange portion 2 is opposed to the outer periphery of the rotary shaft 1 and a side surface 2a of the flange portion 2 at a position outside the flange portion 2 in the axial direction with a slight gap therebetween. On the outer periphery of the rotating shaft 1, there are provided static pressure air bearings 3 and 5 for blowing air from the nozzle holes 3b and 5b.
【０００９】上記静圧空気軸受３および５は、外筒１０
の内側に固定されており、上記外筒１０は、上記静圧空
気軸受３,５にエアを供給するためのエア供給通路６
と、上記静圧空気軸受３,５のノズル孔３b ,５b から吹
き出したエアを排出するためのエア排出通路７を有して
いる。The static pressure air bearings 3 and 5 are
The outer cylinder 10 has an air supply passage 6 for supplying air to the hydrostatic air bearings 3, 5.
And an air discharge passage 7 for discharging air blown out from the nozzle holes 3b, 5b of the static pressure air bearings 3, 5.
【００１０】また、上記フランジ部２の側面２a ,２a
に対向する静圧空気軸受３,５の側面３c ,５c に、エア
の自励振動を抑えるための溝３a ,５a を設けている。
図１(Ａ)に示すように、溝３a ,５a は、上記静圧空気
軸受３,５の側面の径方向内端の径方向位置から上記フ
ランジ部２の側面の径方向外端の径方向位置に亘ってい
る。Further, the side surfaces 2a, 2a of the flange portion 2
Grooves 3a, 5a for suppressing self-excited vibration of air are provided on the side surfaces 3c, 5c of the hydrostatic air bearings 3, 5 facing the air bearing.
As shown in FIG. 1 (A), the grooves 3a, 5a extend from the radial position of the radial inner end of the side surface of the hydrostatic air bearings 3, 5 to the radial outer end of the side surface of the flange portion 2. Over the location.
【００１１】この溝３a は、図１(Ｂ)に示すように、上
記静圧空気軸受３の側面３c に、周方向９０°毎に４本
形成されており、断面が矩形で、径方向に向かって延び
ている。また、上記溝５a も、上記溝３a と同様の形状
をしている。As shown in FIG. 1B, four grooves 3a are formed in the side surface 3c of the hydrostatic air bearing 3 at every 90 ° in the circumferential direction, and have a rectangular cross section and a radial cross section. Extending towards. The groove 5a has the same shape as the groove 3a.
【００１２】上記構成の静圧空気軸受装置によれば、上
記静圧空気軸受３および５が、上記回転軸１の外周にエ
アを吹き付けて、上記回転軸１をラジアル方向に支持す
ると共に、上記外周に吹き付けたエアが上記フランジ部
３２の側面３２a に沿ってエア排出通路７に向けて流出
し、この流出するエアの圧力によって上記回転軸３２を
アキシャル方向に支持することができる。According to the static pressure air bearing device having the above structure, the static pressure air bearings 3 and 5 blow the air to the outer periphery of the rotary shaft 1 to support the rotary shaft 1 in the radial direction, and The air blown to the outer periphery flows out toward the air discharge passage 7 along the side surface 32a of the flange portion 32, and the pressure of the outflow air can support the rotary shaft 32 in the axial direction.
【００１３】また、静圧空気軸受３および５の側面３c
,５c に設けた半径方向に延びる各４本の溝３a ,５a
が、上記フランジ部２がアキシャル方向に移動した際に
フランジ部２の側面と静圧空気軸受３，５との間の圧力
変動を緩和し、上記回転軸１のアキシャル方向の自励振
動を抑える。したがって、上記回転軸１の回転障害を防
止することができ、回転軸１をスムーズに回転させるこ
とができる。Further, side surfaces 3c of the static pressure air bearings 3 and 5
, 5c provided with four radially extending grooves 3a, 5a, respectively.
However, when the flange portion 2 moves in the axial direction, the pressure fluctuation between the side surface of the flange portion 2 and the hydrostatic air bearings 3 and 5 is reduced, and the axial vibration of the rotary shaft 1 in the axial direction is suppressed. . Therefore, it is possible to prevent the rotation of the rotating shaft 1 from being hindered, and to rotate the rotating shaft 1 smoothly.
【００１４】尚、上記実施例では、回転軸が有するフラ
ンジ部に４本の径方向に延びる４本の溝を設けたが、図
２(Ａ)に示すように、フランジ部２１に径方向に延びる
２本の溝２１a ,２１a を設けても良く、また、図２
(Ｂ)に示すように、フランジ部２２に４本の溝２２a
と、上記４本の溝２２a を連絡する径方向中央部の環状
の溝２２b を設けても良い。更に、上記溝の断面形状
は、三角形状でもよく、また、湾曲した半円形状でも良
く、どのような形状であっても良い。In the above embodiment, four grooves extending in the radial direction are provided in the flange portion of the rotary shaft. However, as shown in FIG. Two extending grooves 21a, 21a may be provided.
As shown in (B), four grooves 22a are formed in the flange portion 22.
In addition, an annular groove 22b at the center in the radial direction connecting the four grooves 22a may be provided. Further, the cross-sectional shape of the groove may be a triangular shape, a curved semicircular shape, or any shape.
【００１５】また、上記実施例では、フランジ部に対向
する静圧空気軸受の側面に溝を設けたが、静圧空気軸受
の側面に対向するフランジ部に溝を設けても良く、ま
た、フランジ部と静圧空気軸受の両方に溝を設けても良
い。In the above embodiment, the groove is provided on the side surface of the hydrostatic air bearing facing the flange portion. However, the groove may be provided on the flange portion facing the side surface of the hydrostatic air bearing. Grooves may be provided in both the section and the static pressure air bearing.
【００１６】[0016]
【考案の効果】以上より明らかなように、本考案の静圧
空気軸受装置は、フランジ部の側面または上記フランジ
部の側面に対向する静圧空気軸受の側面の少なくとも一
方に、上記静圧空気軸受の側面の径方向内端の径方向位
置から上記フランジ部の側面の径方向外端の径方向位置
に亘っている径方向溝を設けた。この径方向溝が、上記
フランジ部の側面と上記静圧空気軸受の側面との間を流
出するエアの圧力変動を緩和し、回転軸がアキシャル方
向に自励振動することを抑える。したがって、上記回転
軸をスムーズに回転させることができる。As is apparent from the above description, the hydrostatic air bearing device of the present invention has a structure in which at least one of the side surface of the flange portion and the side surface of the hydrostatic air bearing opposed to the side surface of the flange portion has the hydrostatic air bearing. A radial groove was provided extending from the radial position of the radial inner end of the side surface of the bearing to the radial position of the radial outer end of the side surface of the flange portion. The radial grooves alleviate the pressure fluctuation of the air flowing between the side surface of the flange portion and the side surface of the static pressure air bearing, and suppress self-excited vibration of the rotating shaft in the axial direction. Therefore, the rotation shaft can be smoothly rotated.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本考案の静圧空気軸受装置の実施例の断面図
とフランジ部の溝形状を示す図とを含む図である。FIG. 1 is a view including a sectional view of an embodiment of the hydrostatic air bearing device of the present invention and a view showing a groove shape of a flange portion.
【図２】 上記実施例のフランジ部の溝形状の変形例を
示す図である。FIG. 2 is a view showing a modification of the groove shape of the flange portion of the embodiment.
【図３】 従来の静圧空気軸受装置の断面図である。FIG. 3 is a sectional view of a conventional hydrostatic air bearing device.
１…回転軸、２…フランジ部、３,５…静圧空気軸受、
３a ,５a …溝、３b ,５b …ノズル孔、６…エア供給通
路、７…エア排出通路。1: rotating shaft, 2: flange part, 3, 5: static pressure air bearing,
3a, 5a: groove, 3b, 5b: nozzle hole, 6: air supply passage, 7: air discharge passage.
フロントページの続き (56)参考文献 実開 昭64−53625（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 32/06 Continuation of the front page (56) References Japanese Utility Model Sho 64-53625 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F16C 32/06
Claims (1)
ンジ部のアキシャル方向の外側位置で、回転軸の外周お
よびフランジ部の側面に僅かの隙間を隔てて対向し、上
記回転軸の外周にエアを吹き付ける静圧空気軸受とを備
えて、上記回転軸に向けて吹き付けたエアによって、上
記回転軸をラジアル方向に支持すると共に、上記フラン
ジ部の側面に沿って流出するエアによって、上記回転軸
をアキシャル方向に支持する静圧空気軸受装置におい
て、 上記フランジ部の側面または上記フランジ部の側面に対
向する静圧空気軸受の側面の少なくとも一方に、上記静
圧空気軸受の側面の径方向内端の径方向位置から上記フ
ランジ部の側面の径方向外端の径方向位置に亘っている
径方向溝を設けたことを特徴とする静圧空気軸受装置。1. A rotary shaft having a flange portion, opposed to the outer periphery of the rotary shaft and a side surface of the flange portion with a slight gap at an axially outer position of the flange portion, and air is provided on the outer circumference of the rotary shaft. And a static pressure air bearing that blows the rotating shaft, the air blowing toward the rotating shaft supports the rotating shaft in the radial direction, and the air that flows out along the side surface of the flange portion causes the rotating shaft to rotate. In a hydrostatic air bearing device supporting in the axial direction, at least one of the side surface of the flange portion or the side surface of the hydrostatic air bearing opposed to the side surface of the flange portion, the radial inner end of the side surface of the hydrostatic air bearing A hydrostatic air bearing device, comprising a radial groove extending from a radial position to a radial position of a radially outer end of a side surface of the flange portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992059750U JP2604691Y2 (en) | 1992-08-25 | 1992-08-25 | Static pressure air bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992059750U JP2604691Y2 (en) | 1992-08-25 | 1992-08-25 | Static pressure air bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0622620U JPH0622620U (en) | 1994-03-25 |
| JP2604691Y2 true JP2604691Y2 (en) | 2000-05-22 |
Family
ID=13122238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992059750U Expired - Lifetime JP2604691Y2 (en) | 1992-08-25 | 1992-08-25 | Static pressure air bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2604691Y2 (en) |
-
1992
- 1992-08-25 JP JP1992059750U patent/JP2604691Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0622620U (en) | 1994-03-25 |
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