JPS6376911A - Gas journaling device - Google Patents

Gas journaling device

Info

Publication number
JPS6376911A
JPS6376911A JP21727886A JP21727886A JPS6376911A JP S6376911 A JPS6376911 A JP S6376911A JP 21727886 A JP21727886 A JP 21727886A JP 21727886 A JP21727886 A JP 21727886A JP S6376911 A JPS6376911 A JP S6376911A
Authority
JP
Japan
Prior art keywords
hollow member
shaft
gas
hollow
shaft body
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.)
Pending
Application number
JP21727886A
Other languages
Japanese (ja)
Inventor
Akira Tanaka
章 田中
Yoshitaro Takahashi
高橋 吉太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP21727886A priority Critical patent/JPS6376911A/en
Publication of JPS6376911A publication Critical patent/JPS6376911A/en
Pending legal-status Critical Current

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  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

PURPOSE:To achieve the miniaturization of a device body and the simplification of compressed gas passages, by making the rotating shaft part hollow, and, inside the shaft part, arranging a hollow member whose journaling surface is made the external surface thereof, and further supplying compressed gases into the interior through the end part of the hollow member. CONSTITUTION:In order to rotatably support a shaft body 1 having a hollow part, on the inner circumferential surface 1a of the shaft body 1, a hollow member 2 forming a journaling surface 2d is arranged. And the end parts 2a of the hollow member 2 are fixed in a prescribed position by means of supporting members 3, and one end thereof is made an opened part 2b to which a pump is connected, and further compressed gases are flowed into a gas reserving part 2c. In addition, a plurality of rows of inlet ports 2e are radially provided with a space in the axial direction, each of which is directed toward the outer circumferential surface to be the journaling surface 2d from the gas reserving part 2c of the hollow member 2. Furthermore, on both sides of the end parts 1b of the shaft body 1, flange parts 2f are provided so as to be positioned in the ends of the hollow member 2, and through the flange parts 2 compressed gases are released.

Description

【発明の詳細な説明】 〔概 要〕 本発明は、中空状の軸体を気体被膜により支承するに適
した新規な気体軸支装置を提供するものである。
[Detailed Description of the Invention] [Summary] The present invention provides a novel gas shaft support device suitable for supporting a hollow shaft body with a gas coating.

〔産業上の利用分野〕[Industrial application field]

本発明は、測定器・試験機などの精密機器及び各種装置
の軸支手段として好適な気体軸支装置に関する。
The present invention relates to a gas shaft support device suitable as a shaft support means for precision instruments and various devices such as measuring instruments and testing machines.

〔従来の技術〕[Conventional technology]

従来、回転軸体の軸端外周に設けた静圧気体軸受におい
ては、軸受に設けた給気孔に外部からの圧力源を接続し
、且つ圧力源と給気孔に到る通路等を設ける必要があり
、このため複雑な構成を必要とし、その構成の複雑さの
割に負荷能力が低く、軸受装置としての使用が制限され
る欠点を有し、しかも全体の装置としても大型化せざる
を得ない欠点も有していた。
Conventionally, in a static pressure gas bearing provided on the outer periphery of the shaft end of a rotating shaft, it is necessary to connect an external pressure source to the air supply hole provided in the bearing, and to provide a passage between the pressure source and the air supply hole. For this reason, it requires a complicated configuration, has the disadvantage that its load capacity is low in comparison to the complexity of the configuration, and its use as a bearing device is restricted.Furthermore, the overall device has to be larger. It also had some drawbacks.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は、従来の静圧気体軸受の有する前記欠点を解消
する新規な気体軸支装置を提供するものであり、軸体の
内側から且つ軸体の長さ方向に亘る支承により、小型で
且つ簡単な構成であって、気体軸受に比して負荷能力が
高い気体軸支装置を提供するものである。
The present invention provides a novel gas shaft support device that eliminates the above-mentioned drawbacks of conventional hydrostatic gas bearings, and is compact and has support from the inside of the shaft body and extending in the length direction of the shaft body. It is an object of the present invention to provide a gas shaft support device that has a simple configuration and has a higher load capacity than a gas bearing.

〔問題点を解決するための手段〕[Means for solving problems]

本発明の気体軸支装置は、軸体の中空部を回動自在に支
承しうる中空状部材を有し、該中空状部材の一端に圧縮
気体供給源を接続しうると共に、中空状部材の内部を気
体溜り部とし、中空状部材の環状部には適宜間隔の半径
方向の微小孔からなる給気孔を軸方向に複数列設けたこ
とを特徴とするものである。
The gas shaft support device of the present invention has a hollow member that can rotatably support the hollow part of the shaft, a compressed gas supply source can be connected to one end of the hollow member, and The interior is a gas reservoir, and the annular portion of the hollow member is characterized by having a plurality of rows of air supply holes made of radial micro holes at appropriate intervals in the axial direction.

〔作 用〕[For production]

本発明の構成により、圧縮気体供給源から送られた圧縮
気体は中空状部材の端部から気体溜り部内に供給され、
該気体溜り部から軸方向に複数列、円周方向に複数個設
けた給気孔を通って回転部材である軸体内周面と軸支面
となる中空状部材の外周面との間に送り込まれ、ここで
気体の膜面を形成しながら、軸体と中空状部材の両端部
から大気中に放出される。
With the configuration of the present invention, the compressed gas sent from the compressed gas supply source is supplied into the gas reservoir from the end of the hollow member,
The gas is fed from the gas reservoir through the air supply holes provided in multiple rows in the axial direction and in a plurality in the circumferential direction between the inner circumferential surface of the shaft, which is a rotating member, and the outer circumferential surface of a hollow member, which is a shaft supporting surface. Here, the gas is released into the atmosphere from both ends of the shaft and the hollow member while forming a gas film surface.

この際、軸体は中空であり、軸支体である中空状部材は
軸体の軸方向の全長にわたって位置することができるた
め、中空状部材の両端位置だけ給気孔を設けることも可
能であり、また軸方向の全長に適宜間隔をおいて多数の
列数の給気孔を設けることもできるから、軽荷重から重
荷重の軸体の支承に適し、また軸の端部位置には、中空
状部材のフランジにより軸体に対してスラスト方向に空
気圧が働き、軸体のスラスト方向の動きを規制する作用
を与える。
In this case, since the shaft body is hollow and the hollow member serving as the shaft support body can be located over the entire length of the shaft body in the axial direction, it is also possible to provide air supply holes only at both ends of the hollow member. In addition, it is possible to provide a large number of rows of air supply holes at appropriate intervals along the entire length of the shaft, making it suitable for supporting shafts with light to heavy loads. Air pressure acts on the shaft in the thrust direction by the flange of the member, giving an effect to restrict movement of the shaft in the thrust direction.

〔実施例〕〔Example〕

本発明の気体軸支装置の実施例について説明する。 An embodiment of the gas shaft support device of the present invention will be described.

第1図は、軸体の全長に亘って支承する気体軸支装置に
関し、中空部を有する軸体1を回軸自在に支承するため
、軸体1の内周面1aには、軸支面2dを構成する中空
状部材2が位置する。
Fig. 1 relates to a gas bearing device that supports the entire length of the shaft, and in order to rotatably support the shaft 1 having a hollow part, the inner circumferential surface 1a of the shaft 1 has a shaft bearing surface. A hollow member 2 constituting 2d is located.

中空状部材2は、その端部2a、2aを支持部材3,3
により所定位置に固定される。中空状部材2の一端を開
口部2bとし、この開口部2bに図示されていない圧縮
気体供給源としてのポンプが接続され、圧縮気体は中空
状部材2の内部に設けられた気体溜り部2cに流入する
The hollow member 2 has its ends 2a, 2a connected to supporting members 3, 3.
is fixed in place. One end of the hollow member 2 is an opening 2b, a pump (not shown) serving as a compressed gas supply source is connected to the opening 2b, and the compressed gas is supplied to a gas reservoir 2c provided inside the hollow member 2. Inflow.

中空状部材2の空気溜り部2cから軸支面2dとなる外
周面に向って、中空状部材2の環状部には軸方向には二
列の給気孔2e、2e・・・が設けられ、各列の給気孔
2eは放射状に8個の微小径の給気孔からなっている。
Two rows of air supply holes 2e, 2e, . The air supply holes 2e in each row are made up of eight radially small air supply holes.

給気孔の軸方向での列数及び放射方向での数は支承され
る軸体の長さ、軸体に加わる荷重等に応じて増減するこ
とができる。
The number of rows of air supply holes in the axial direction and the number in the radial direction can be increased or decreased depending on the length of the supported shaft, the load applied to the shaft, etc.

中空部の軸体1の端部1b、lbの両側には、中空状部
材2の端部に位置するフランジ部2f。
Flange portions 2f located at the ends of the hollow member 2 are provided on both sides of the ends 1b, lb of the hollow shaft body 1.

2fが設けられ、圧縮気体は中空部の軸体1の端部1b
、lbと中空状部材2のフランジ部2f。
2f is provided, and the compressed gas is supplied to the end 1b of the shaft body 1 in the hollow part.
, lb and the flange portion 2f of the hollow member 2.

2fとの間を通って大気中に放出される。この際、端部
1b、lbとフランジ部2f、2fとの間隙を通る空気
圧は、フランジ部2f、2fにより軸体1をスラスト方
向に位置ぎめする作動を与える。
2f and is emitted into the atmosphere. At this time, the air pressure passing through the gap between the end portions 1b, lb and the flange portions 2f, 2f acts to position the shaft body 1 in the thrust direction by the flange portions 2f, 2f.

第3図に示される実施例は、第1図の実施例において軸
体1がその軸方向の全長に亘って中空状部材2により支
承されるのに対し、軸体1の両端部において中空状部材
2により支承されるようにした気体軸支装置に関するも
のであり、第3図には、第1図における右側の端部(圧
縮気体供給側)についてのみ示している。
In the embodiment shown in FIG. 3, the shaft 1 is supported by a hollow member 2 over its entire axial length in the embodiment shown in FIG. This relates to a gas shaft support device supported by a member 2, and FIG. 3 shows only the right end (compressed gas supply side) in FIG. 1.

軸体1が中空部を有し、該中空部の内周面1aには中空
状部材2の軸支面2dが位置し、中空状部材2はその内
部を空気溜り部2cとし、一端には開口部2bを設け、
開口部2bには圧縮気体供給源としてのポンプを接続す
ることができる点、第1図の実施例と同様である。
The shaft body 1 has a hollow part, and the shaft support surface 2d of the hollow member 2 is located on the inner circumferential surface 1a of the hollow part, and the hollow member 2 has an air pocket 2c inside, and an air pocket 2c at one end. An opening 2b is provided,
This embodiment is similar to the embodiment shown in FIG. 1 in that a pump as a compressed gas supply source can be connected to the opening 2b.

軸体1の両端部分を中空状部材2により支承するため、
軸体1の端部位置の内周面と中空状部材の端部位置の外
周面に所定間隔を保つように加工を施し、且つ該中空状
部材の端部位置には夫々二側で放射状に8個の給気孔2
e、2e・・・を設けている。
In order to support both end portions of the shaft body 1 by the hollow member 2,
The inner circumferential surface at the end of the shaft body 1 and the outer circumferential surface at the end of the hollow member are processed so as to maintain a predetermined interval, and radial grooves are formed on the two sides at the end of the hollow member. 8 air supply holes 2
e, 2e... are provided.

中空状部材2の端部には、フランジ部2f、2fが設け
られ、該フランジ部2fは軸体1の端部1bとの間に間
隙を配して設けられ、給気孔2e、2eから軸体1の内
周面1aと中空状部材2の外周面2dとの間を経て大気
中に流出する空気被膜はこの間隙においてスラスト方向
に作用し、軸体1の軸方向の位置ぎめを可能とする。
Flange portions 2f, 2f are provided at the ends of the hollow member 2, and the flange portions 2f are provided with a gap between them and the end portion 1b of the shaft body 1, and the air supply holes 2e, 2e are connected to the shaft. The air film flowing out into the atmosphere through the space between the inner circumferential surface 1a of the body 1 and the outer circumferential surface 2d of the hollow member 2 acts in the thrust direction in this gap, making it possible to position the shaft body 1 in the axial direction. do.

5は軸体の外周面に設けられた耐熱用サーモチューブで
あり、2gは空気溜り部2cを構成する内壁面である。
5 is a heat-resistant thermotube provided on the outer peripheral surface of the shaft body, and 2g is an inner wall surface forming the air pocket 2c.

以上の構成により、中空状部材2の一端に設けられた開
口部2bに、圧縮気体供給源としてのポンプが接続され
、圧縮気体が中空状部材2の空気溜り部2cに供給され
、更に中空状部材2に形成された給気孔2e、2e・・
・を経て中空状部材2の外周面2dと回転する軸体1の
内周面1aとの間隙に送られ、ここで気体薄膜を形成し
、軸体1は中空状部材2の外周面2d上で気体薄膜を介
して円滑に回転する。
With the above configuration, a pump as a compressed gas supply source is connected to the opening 2b provided at one end of the hollow member 2, compressed gas is supplied to the air reservoir 2c of the hollow member 2, and the Air supply holes 2e, 2e formed in member 2...
The gas is sent to the gap between the outer circumferential surface 2d of the hollow member 2 and the inner circumferential surface 1a of the rotating shaft 1, where a thin gas film is formed, and the shaft 1 is sent to the gap between the outer circumferential surface 2d of the hollow member 2 and the inner circumferential surface 1a of the rotating shaft 1. rotates smoothly through a thin gas film.

中空状部材2の外周面2dと軸体1の内周面1aとの間
隙の気体は軸体1の両端部1bにおいて中空状部材2の
フランジ部2fに沿って大気中に放出され、この際軸部
1の端部1bと中空状部材2のフランジ部2fとの間の
気体薄膜は軸体1に対してスラスト方向の移動を規制す
る役割を果たしている。
The gas in the gap between the outer circumferential surface 2d of the hollow member 2 and the inner circumferential surface 1a of the shaft body 1 is released into the atmosphere along the flange portion 2f of the hollow member 2 at both ends 1b of the shaft body 1. A thin gas film between the end portion 1b of the shaft portion 1 and the flange portion 2f of the hollow member 2 plays the role of regulating movement of the shaft body 1 in the thrust direction.

〔効 果〕〔effect〕

本発明は、回転する軸部を中空状とし、軸支面を外表面
とした中空状部材を、軸部の内部に配置した構成を採用
したことにより、従来よりも小型化した気体軸支装置を
提供すると共に、圧縮気体の供給手段を中空状部材の端
部に接続でき、且つ中空状部材の内部を空気溜めとして
利用することにより、従来の軸体の外周に軸受を配置し
た型式の気体軸受に比較して、給気孔に圧縮気体を送る
ために必要な複雑な通路及び構成を全く必要とせず、簡
単な構成で精度の良い気体軸支装置を安価に提供しろる
効果を有し、しかも、回転する軸部の軸方向全長に亘り
軸支面により支承できるため、負荷能力を大きくするこ
とができる利点を有している。
The present invention employs a structure in which the rotating shaft part is hollow and a hollow member with the shaft support surface as the outer surface is placed inside the shaft part, thereby making the gas shaft support device smaller than the conventional one. At the same time, the compressed gas supply means can be connected to the end of the hollow member, and the inside of the hollow member can be used as an air reservoir, thereby providing a conventional type of gas in which a bearing is arranged on the outer periphery of the shaft body. Compared to bearings, it does not require any complicated passages or configurations necessary to send compressed gas to the air supply holes, and has the effect of providing a highly accurate gas shaft support device at low cost with a simple configuration. Moreover, since the entire axial length of the rotating shaft portion can be supported by the shaft bearing surface, there is an advantage that the load capacity can be increased.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の気体軸支装置の一実施例の側面図を
示し、第2図は、第1図のA−A断面図を示し、第3図
は、本発明の気体軸支装置の他の実施例の一部側面図を
示す。 1・・・軸体、2・・・中空状部材、2c・・・気体溜
り部、2e・・・給気孔。
FIG. 1 shows a side view of an embodiment of the gas shaft support device of the present invention, FIG. 2 shows a sectional view taken along the line A-A in FIG. 1, and FIG. Figure 3 shows a partial side view of another embodiment of the device. DESCRIPTION OF SYMBOLS 1... Shaft body, 2... Hollow member, 2c... Gas reservoir part, 2e... Air supply hole.

Claims (1)

【特許請求の範囲】[Claims] 軸体の中空部を回動自在に支承しうる中空状部材を有し
、該中空状部材の一端に圧縮気体供給源を接続しうると
共に、中空状部材の内部を気体溜り部とし、中空状部材
の環状部には適宜間隔の半径方向の微小孔からなる給気
孔を軸方向に複数列設けたことを特徴とする気体軸支装
置。
It has a hollow member that can rotatably support the hollow part of the shaft, a compressed gas supply source can be connected to one end of the hollow member, and the inside of the hollow member is used as a gas reservoir, and the hollow member A gas shaft support device characterized in that the annular portion of the member is provided with a plurality of rows of air supply holes consisting of radial micro holes at appropriate intervals in the axial direction.
JP21727886A 1986-09-17 1986-09-17 Gas journaling device Pending JPS6376911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21727886A JPS6376911A (en) 1986-09-17 1986-09-17 Gas journaling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21727886A JPS6376911A (en) 1986-09-17 1986-09-17 Gas journaling device

Publications (1)

Publication Number Publication Date
JPS6376911A true JPS6376911A (en) 1988-04-07

Family

ID=16701631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21727886A Pending JPS6376911A (en) 1986-09-17 1986-09-17 Gas journaling device

Country Status (1)

Country Link
JP (1) JPS6376911A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527339U (en) * 1991-09-24 1993-04-09 三菱重工業株式会社 Air bearing type guide roller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513222U (en) * 1974-06-24 1976-01-10
JPS6049119A (en) * 1983-08-24 1985-03-18 Sanyo Seiki:Kk Gas bearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513222U (en) * 1974-06-24 1976-01-10
JPS6049119A (en) * 1983-08-24 1985-03-18 Sanyo Seiki:Kk Gas bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527339U (en) * 1991-09-24 1993-04-09 三菱重工業株式会社 Air bearing type guide roller

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