JP3088601B2 - Hydrostatic bearing - Google Patents
Hydrostatic bearingInfo
- Publication number
- JP3088601B2 JP3088601B2 JP05323846A JP32384693A JP3088601B2 JP 3088601 B2 JP3088601 B2 JP 3088601B2 JP 05323846 A JP05323846 A JP 05323846A JP 32384693 A JP32384693 A JP 32384693A JP 3088601 B2 JP3088601 B2 JP 3088601B2
- Authority
- JP
- Japan
- Prior art keywords
- air supply
- ejection hole
- hydrostatic bearing
- axial
- pressurized fluid
- 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】この発明は、高速回転する軸体を
支持する静圧軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrostatic bearing for supporting a shaft rotating at a high speed.
【０００２】[0002]
【従来の技術】従来、この種の静圧軸受としては、図４
に示すように、軸体４１の周りに配置され、給気路４２
と径方向の噴出孔４３とを備えた静圧軸受５１がある。
上記静圧軸受５１は、外周の流体通路４６から給気路４
２に加圧流体が供給され、この加圧流体は、噴出孔４３
から軸体４１に噴出されるようになっている。2. Description of the Related Art Conventionally, as a hydrostatic bearing of this type, FIG.
As shown in FIG.
And a hydrostatic bearing 51 provided with a radial ejection hole 43.
The static pressure bearing 51 is connected to the supply passage 4 from the fluid passage 46 on the outer periphery.
2 is supplied with pressurized fluid, and this pressurized fluid
From the shaft body 41.
【０００３】また、図６に示すように、上記静圧軸受５
１に軸方向に隣接して静圧軸受５２が固定されており、
この静圧軸受５２は径方向の給気路４８ａとこの給気路
４８ａに直交する軸方向の給気路４８ｂとこの給気路４
８ｂから軸方向に延びる噴出孔５０を有している。この
静圧軸受５２は軸体４１のフランジ４７に加圧流体を噴
き着けるようになっている。Further, as shown in FIG.
1, a hydrostatic bearing 52 is fixed adjacently in the axial direction,
The static pressure bearing 52 includes a radial air supply passage 48a, an axial air supply passage 48b orthogonal to the air supply passage 48a, and an air supply passage 4b.
8b has an ejection hole 50 extending in the axial direction. The static pressure bearing 52 is configured to spray a pressurized fluid onto the flange 47 of the shaft 41.
【０００４】上記静圧軸受５１と５２は、外周面に配置
されたＯリング５３を介して図示しないハウジングに取
り付けられている。The static pressure bearings 51 and 52 are mounted on a housing (not shown) via an O-ring 53 disposed on the outer peripheral surface.
【０００５】上記静圧軸受５１は径方向の噴出孔４３か
ら径方向に噴出される加圧流体によって軸体４１を径方
向に支持し、上記静圧軸受５２は軸方向の噴出孔５０か
ら軸方向に噴出される加圧流体によって軸体４１をフラ
ンジ４７を介して軸方向に支持する。The hydrostatic bearing 51 supports the shaft 41 in the radial direction by pressurized fluid jetted radially from the jet hole 43 in the radial direction, and the hydrostatic bearing 52 rotates the shaft 41 from the jet hole 50 in the axial direction. The shaft body 41 is axially supported via the flange 47 by the pressurized fluid ejected in the direction.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の静圧軸受は、軸体４１を支持するために、径方向支
持用の静圧軸受５１と別個に軸方向支持用の静圧軸受５
２を必要とするから、コンパクト性が劣っているという
問題がある。However, in order to support the shaft body 41, the above-mentioned conventional hydrostatic bearing is provided separately from the hydrostatic bearing 51 for radial support and the hydrostatic bearing 5 for axial support.
2 is required, there is a problem that compactness is inferior.
【０００７】そこで、図５に示すように、１つの給気路
６１から径方向の噴出孔６２と軸方向の噴出孔６３の両
方を延在させた静圧軸受が考えられる。Therefore, as shown in FIG. 5, a hydrostatic bearing in which both a radial ejection hole 62 and an axial ejection hole 63 extend from one air supply passage 61 is considered.
【０００８】しかし、この静圧軸受は、上記軸方向の噴
出孔６３の長さを、ハウジングに取り付けるためのＯリ
ング６５が設けられる周溝６６の軸方向寸法Ａよりも長
くしなければならないので、軸方向の噴出孔６３の加工
が難しいという問題がある。そこで、この発明の目的
は、コンパクトかつ加工が容易な静圧軸受を提供するこ
とにある。However, in this hydrostatic bearing, the length of the axial ejection hole 63 must be longer than the axial dimension A of the circumferential groove 66 in which the O-ring 65 for mounting to the housing is provided. However, there is a problem that it is difficult to process the ejection hole 63 in the axial direction. Therefore, an object of the present invention is to provide a hydrostatic bearing that is compact and easy to machine.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、この発明の静圧軸受は、加圧流体が供給される給気
路と、上記給気路よりも小径であり、上記給気路から供
給された加圧流体を軸体に噴射する噴出孔とを備えた静
圧軸受において、上記給気路は、上記軸体の周囲に複数
独立して形成され、上記各給気路は、給気部と、この給
気部よりも大径のチャンバー部とを備え、上記大径のチ
ャンバー部から、軸方向の噴出孔と径方向の噴出孔とが
延在させられていることを特徴としている。In order to achieve the above object, a static pressure bearing according to the present invention has an air supply path to which a pressurized fluid is supplied, a smaller diameter than the air supply path, and an air supply path. In the hydrostatic bearing provided with an ejection hole for injecting the pressurized fluid supplied from the shaft to the shaft, a plurality of the air supply passages are independently formed around the shaft body, and each of the air supply passages is An air supply section and a chamber section having a larger diameter than the air supply section are provided, and an axial ejection hole and a radial ejection hole are extended from the large diameter chamber section. And
【００１０】[0010]
【作用】上記発明によれば、軸方向の噴出孔を大径のチ
ャンバー部から延在させたから、チャンバー部がない給
気路から軸方向の噴出孔を延在させている従来例に比べ
て、軸方向の噴出孔の軸方向の長さが短くなる。したが
って、上記発明によれば、軸方向の噴出孔の加工が容易
になり、径方向の噴出孔と軸方向の噴出孔の両方を１つ
の給気路に形成する加工が容易になる。According to the present invention, since the axial ejection holes extend from the large-diameter chamber portion, the axial ejection holes extend from the air supply passage having no chamber portion as compared with the conventional example in which the axial ejection holes extend from the air supply passage having no chamber portion. Thus, the axial length of the ejection hole in the axial direction is reduced. Therefore, according to the above-described invention, the processing of the axial ejection holes is facilitated, and the processing of forming both the radial ejection holes and the axial ejection holes in one air supply path is facilitated.
【００１１】したがって、この発明によれば、加工が容
易で、かつ、１つの給気路から径方向の噴出孔と軸方向
の噴出孔の両方が延在している静圧軸受が提供される。Therefore, according to the present invention, there is provided a hydrostatic bearing in which machining is easy and both the radial ejection hole and the axial ejection hole extend from one air supply passage. .
【００１２】つまり、この発明によれば、コンパクトか
つ加工が容易な静圧軸受が提供される。That is, according to the present invention, there is provided a hydrostatic bearing which is compact and easy to machine.
【００１３】[0013]
【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.
【００１４】図２にこの発明の静圧軸受の実施例の半断
面を示し、図１に上記実施例を備えた静圧軸受装置の半
断面を示す。図１に示した静圧軸受装置の横断面を、図
３に模式的に示す。FIG. 2 shows a half section of an embodiment of the hydrostatic bearing according to the present invention, and FIG. 1 shows a half section of a hydrostatic bearing device provided with the above embodiment. A cross section of the hydrostatic bearing device shown in FIG. 1 is schematically shown in FIG.
【００１５】この実施例の静圧軸受１０は、図３に示す
ようにリング状になっており、図２に示すように、加圧
流体が供給される外周面１０ａに開口した給気路１を有
し、この給気路１は給気部２と給気部２よりも大径のチ
ャンバー部３を有している。そして、このチャンバー部
３から径方向の噴出孔５と軸方向の噴出孔６とが延びて
いる。また、この静圧軸受１０は、外周面１０ａにＯリ
ング用の周溝１１と１２が形成されている。そして、こ
の周溝１１と１２に、Ｏリング１３と１４が嵌合されて
いる。The hydrostatic bearing 10 of this embodiment has a ring shape as shown in FIG. 3, and as shown in FIG. 2, an air supply passage 1 opened to an outer peripheral surface 10a to which a pressurized fluid is supplied. The air supply path 1 has an air supply part 2 and a chamber part 3 having a larger diameter than the air supply part 2. A radial ejection hole 5 and an axial ejection hole 6 extend from the chamber portion 3. Further, in this hydrostatic bearing 10, peripheral grooves 11 and 12 for an O-ring are formed on an outer peripheral surface 10a. The O-rings 13 and 14 are fitted in the circumferential grooves 11 and 12, respectively.
【００１６】この静圧軸受１０は、図１に示すように、
ハウジング１５の内側に取り付けられる。また、上記ハ
ウジング１５の内側には、上記静圧軸受１０と同じ構造
の静圧軸受１６が、環状のスペーサ１７を挟んで静圧軸
受１０と向かい合わせに取り付けられている。そして、
上記静圧軸受１０と１６の内周面１０ｂと１６ｂが軸体
１８の軸部１８ａに対向させられ、スペーサ１７が軸体
１８のフランジ部１８ｂに対向させられている。つま
り、フランジ部１８ｂは、静圧軸受１０と１６とに挟ま
れており、静圧軸受１０の軸方向の噴出孔６と静圧軸受
１６の軸方向の噴出孔２４とに挟まれている。As shown in FIG. 1, this hydrostatic bearing 10
It is attached inside the housing 15. A static pressure bearing 16 having the same structure as the static pressure bearing 10 is mounted inside the housing 15 so as to face the static pressure bearing 10 with an annular spacer 17 interposed therebetween. And
The inner peripheral surfaces 10b and 16b of the hydrostatic bearings 10 and 16 are opposed to the shaft 18a of the shaft 18, and the spacer 17 is opposed to the flange 18b of the shaft 18. That is, the flange portion 18b is sandwiched between the static pressure bearings 10 and 16, and is sandwiched between the axial ejection hole 6 of the static pressure bearing 10 and the axial ejection hole 24 of the static pressure bearing 16.
【００１７】図３に示すように、上記静圧軸受１０は、
軸体１８の周りに上記チャンバー部３を含む４つの給気
路１が形成されている。As shown in FIG. 3, the hydrostatic bearing 10
Four air supply paths 1 including the chamber section 3 are formed around the shaft body 18.
【００１８】上記構成の静圧軸受装置は、ハウジング１
５に形成された流体導入路１５ａから加圧流体が導入さ
れ、静圧軸受１０および１６の給気路１および２１に加
圧流体が導入される。そして、上記給気路１から径方向
の噴出孔５と軸方向の噴出孔６の両方に加圧流体が導入
され、径方向の噴出孔５から軸部１８ａに加圧流体が噴
き着けられ、軸方向の噴出孔６からフランジ部１８ｂに
加圧流体が噴き着けられる。また、上記給気路２１から
径方向の噴出孔２３と軸方向の噴出孔２４の両方に加圧
流体が導入され、径方向の噴出孔２３から軸部１８ａに
加圧流体が噴き着けられ、軸方向の噴出孔２４からフラ
ンジ部１８ｂに加圧流体が噴き着けられる。こうして、
静圧軸受１０と１６によって、軸体１８が径方向および
軸方向に支持される。In the hydrostatic bearing device having the above-described structure, the housing 1
The pressurized fluid is introduced from the fluid introduction passage 15a formed in 5 and the pressurized fluid is introduced into the air supply passages 1 and 21 of the hydrostatic bearings 10 and 16. Then, pressurized fluid is introduced from the air supply passage 1 into both the radial ejection hole 5 and the axial ejection hole 6, and the pressurized fluid is ejected from the radial ejection hole 5 to the shaft portion 18a. Pressurized fluid is sprayed from the axial ejection hole 6 to the flange portion 18b. Also, pressurized fluid is introduced from the air supply passage 21 into both the radial ejection hole 23 and the axial ejection hole 24, and the pressurized fluid is ejected from the radial ejection hole 23 to the shaft portion 18a, Pressurized fluid is sprayed from the axial ejection hole 24 to the flange portion 18b. Thus,
The shaft body 18 is supported radially and axially by the hydrostatic bearings 10 and 16.
【００１９】上記静圧軸受１０は、軸方向の噴出孔６を
大径のチャンバー部３から延在させたから、チャンバー
部がない給気路から軸方向の噴出孔を延在させている従
来例に比べて、軸方向の噴出孔６の軸方向の長さを短く
できる。したがって、上記実施例によれば、軸方向の噴
出孔６の加工を容易にできる。しかも、静圧軸受１０
は、１つの給気路１から径方向の噴出孔５と軸方向の噴
出孔６の両方を延在させているから、１つの静圧軸受１
０で軸体１８を径方向と軸方向の両方に支持することが
できる。したがって、この実施例の静圧軸受１０によれ
ば、コンパクトで加工が容易な静圧軸受を実現できる。In the hydrostatic bearing 10, since the axial orifice 6 extends from the large-diameter chamber 3, the axial orifice extends from an air supply passage having no chamber. The axial length of the ejection hole 6 in the axial direction can be shortened as compared with the above. Therefore, according to the above embodiment, the processing of the ejection hole 6 in the axial direction can be facilitated. Moreover, the hydrostatic bearing 10
Extends both the radial ejection hole 5 and the axial ejection hole 6 from one air supply passage 1 so that one hydrostatic bearing 1
At 0, the shaft 18 can be supported in both the radial direction and the axial direction. Therefore, according to the hydrostatic bearing 10 of this embodiment, it is possible to realize a hydrostatic bearing that is compact and easy to machine.
【００２０】また、上記実施例によれば、給気路１に大
径のチャンバー部３を設けたから、チャンバー部３がな
い場合にくらべて、給気路１内の加圧流体による減衰力
を大きくできる。このため、上記実施例によれば、軸体
１８の振動を抑制する振動抑制力を向上できる。Further, according to the above embodiment, since the large-diameter chamber portion 3 is provided in the air supply passage 1, the damping force by the pressurized fluid in the air supply passage 1 is reduced as compared with the case where the chamber portion 3 is not provided. Can be larger. Therefore, according to the above embodiment, the vibration suppressing force for suppressing the vibration of the shaft body 18 can be improved.
【００２１】尚、上記実施例では、チャンバー部３を給
気路１の端に配置させたが、給気路１の中間にチャンバ
ー部を配置させてもよい。In the above embodiment, the chamber 3 is arranged at the end of the air supply passage 1, but the chamber may be arranged in the middle of the air supply passage 1.
【００２２】[0022]
【発明の効果】以上より明らかなように、この発明の静
圧軸受は、加圧流体が供給されて噴出孔に加圧流体を供
給する給気路が、給気部とこの給気部よりも大径のチャ
ンバー部を備え、大径のチャンバー部から、軸方向の噴
出孔と径方向の噴出孔とが延在させられているものであ
る。As is apparent from the above description, in the hydrostatic bearing of the present invention, the supply passage through which the pressurized fluid is supplied to supply the pressurized fluid to the ejection holes is formed by the supply section and the supply section. Also has a large-diameter chamber portion, and an axial ejection hole and a radial ejection hole extend from the large-diameter chamber portion.
【００２３】したがって、この発明によれば、チャンバ
ー部がない給気路から軸方向の噴出孔を延在させている
従来例に比べて、軸方向の噴出孔の軸方向の長さを短く
できる。したがって、上記発明によれば、軸方向の噴出
孔の加工を容易にできる。Therefore, according to the present invention, the axial length of the ejection hole in the axial direction can be reduced as compared with the conventional example in which the ejection hole in the axial direction extends from the air supply passage without the chamber portion. . Therefore, according to the above-mentioned invention, the processing of the ejection hole in the axial direction can be facilitated.
【００２４】また、この発明によれば、１つの給気路か
ら径方向の噴出孔と軸方向の噴出孔の両方に加圧流体を
供給できるしたがって、この発明によれば、コンパクト
かつ加工が容易な静圧軸受を提供できる。Further, according to the present invention, the pressurized fluid can be supplied to both the radial ejection hole and the axial ejection hole from one air supply passage. Therefore, according to the present invention, compactness and easy processing are achieved. A simple static pressure bearing can be provided.
【００２５】また、この発明によれば、給気路に大径の
チャンバー部を設けたから、チャンバー部がない場合に
比べて、給気路内の加圧流体による減衰力を大きくでき
る。したがって、この発明によれば、軸体の振動を抑制
する振動抑制力を向上できる。According to the present invention, since the large-diameter chamber portion is provided in the air supply passage, the damping force by the pressurized fluid in the air supply passage can be increased as compared with the case where the chamber portion is not provided. Therefore, according to the present invention, the vibration suppressing force for suppressing the vibration of the shaft body can be improved.
【図１】 この発明の静圧軸受の実施例が組み込まれた
静圧軸受装置の半断面図である。FIG. 1 is a half sectional view of a hydrostatic bearing device in which an embodiment of a hydrostatic bearing of the present invention is incorporated.
【図２】 上記実施例の半断面図である。FIG. 2 is a half sectional view of the embodiment.
【図３】 上記実施例の横断面図である。FIG. 3 is a cross-sectional view of the embodiment.
【図４】 従来例の横断面図である。FIG. 4 is a cross-sectional view of a conventional example.
【図５】 従来例の半断面図である。FIG. 5 is a half sectional view of a conventional example.
【図６】 今一つの従来例の半断面図である。FIG. 6 is a half sectional view of another conventional example.
１…給気路、２…給気部、３…チャンバー部、５…噴出
孔、６…噴出孔、１０，１６…静圧軸受、１３，１４…
Ｏリング、１８…軸体、１８ａ…軸部、１８ｂ…フラン
ジ部。DESCRIPTION OF SYMBOLS 1 ... Air supply path, 2 ... Air supply part, 3 ... Chamber part, 5 ... Jet hole, 6 ... Jet hole, 10, 16 ... Static pressure bearing, 13, 14 ...
O-ring, 18: shaft, 18a: shaft, 18b: flange.
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 32/06 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) F16C 32/06
Claims (1)
気路よりも小径であり、上記給気路から供給された加圧
流体を軸体に噴射する噴出孔とを備えた静圧軸受におい
て、 上記給気路は、上記軸体の周囲に複数独立して形成さ
れ、 上記各給気路は、給気部と、この給気部よりも大径のチ
ャンバー部とを備え、 上記大径のチャンバー部から、軸方向の噴出孔と径方向
の噴出孔とが延在させられていることを特徴とする静圧
軸受。1. An air supply path for supplying a pressurized fluid, and an ejection hole having a diameter smaller than that of the air supply path and ejecting the pressurized fluid supplied from the air supply path to a shaft. In the hydrostatic bearing, a plurality of the air supply passages are independently formed around the shaft body, and each of the air supply passages includes an air supply portion and a chamber portion having a larger diameter than the air supply portion. A hydrostatic bearing, wherein an axial ejection hole and a radial ejection hole extend from the large-diameter chamber portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05323846A JP3088601B2 (en) | 1993-12-22 | 1993-12-22 | Hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05323846A JP3088601B2 (en) | 1993-12-22 | 1993-12-22 | Hydrostatic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07174141A JPH07174141A (en) | 1995-07-11 |
| JP3088601B2 true JP3088601B2 (en) | 2000-09-18 |
Family
ID=18159243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05323846A Expired - Lifetime JP3088601B2 (en) | 1993-12-22 | 1993-12-22 | Hydrostatic bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3088601B2 (en) |
-
1993
- 1993-12-22 JP JP05323846A patent/JP3088601B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07174141A (en) | 1995-07-11 |
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