JP2569348Y2 - Fluid bearing - Google Patents
Fluid bearingInfo
- Publication number
- JP2569348Y2 JP2569348Y2 JP1991066198U JP6619891U JP2569348Y2 JP 2569348 Y2 JP2569348 Y2 JP 2569348Y2 JP 1991066198 U JP1991066198 U JP 1991066198U JP 6619891 U JP6619891 U JP 6619891U JP 2569348 Y2 JP2569348 Y2 JP 2569348Y2
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- bearing
- throttle
- bearing body
- pressure
- 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、作動油等の非圧縮性の
作動流体の圧力により回転軸を軸承する流体軸受に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid bearing for supporting a rotating shaft by the pressure of an incompressible working fluid such as a working oil .
【０００２】[0002]
【従来の技術】外部から供給される作動流体の圧力で回
転軸を軸受面から浮かせ、回転軸を軸受面に対して非接
触にて支承する流体軸受が多数知られており、例えば、
実公昭６２−１４４１７号公報により、内周面に複数個
の流体ポケットが刻設された軸受メタルを焼きばめや冷
やしばめにより内嵌保持する軸受本体に、該軸受本体の
端面から軸方向に延びる作動流体のメイン通路を形成す
ると共に、軸受本体の周面から該メイン通路と交差して
径方向内方に延て上記流体ポケットの各々に連通する複
数個の流体通路を、軸方向に間隔を存して１列に形成
し、各流体通路の本体周面の開口部から、メイン通路を
越えた位置まで絞り部材を挿入セットした後、各流体通
路の開口部にプラグを螺入し、これら各開口部を閉鎖し
たものが知られている。2. Description of the Related Art Many fluid bearings are known in which a rotating shaft is lifted from a bearing surface by the pressure of a working fluid supplied from the outside, and the rotating shaft is supported in a non-contact manner with the bearing surface.
According to Japanese Utility Model Publication No. 62-14417, a bearing metal having a plurality of fluid pockets engraved on an inner peripheral surface thereof is internally fitted and held by shrink fitting or cold fitting. A plurality of fluid passages extending in the radial direction from the peripheral surface of the bearing body and extending radially inward from the peripheral surface of the bearing body to communicate with each of the fluid pockets are formed in the axial direction. The throttle members are formed in a row at intervals, and the throttle member is inserted and set from the opening on the peripheral surface of the main body of each fluid passage to a position beyond the main passage, and then a plug is screwed into the opening of each fluid passage. One in which these openings are closed is known.
【０００３】[0003]
【考案が解決しようとする課題】上記複数個の流体ポケ
ット内の流体圧力は、ラジアル荷重の変動等に対処する
ため個々に独立して制御されなければならず、従って、
１個の絞り部材を複数個の流体ポケットで共用できな
い。上記公報に掲載された従来の流体軸受では、絞り部
材を介設する流体通路をメイン通路に沿って軸方向１列
に形成しているので、流体ポケットの個数を増加した場
合、これと同数の流体通路の形成スペースを確保する上
で、軸受メタルの軸方向の長さが必要以上に長くなり、
流体軸受が大型化するという問題が生じる。また、上記
プラグと絞り部材とを連結し、軸受の仕様変更等により
絞り部材を交換し得るように構成する場合には、プラグ
の脱着時にプラグや該プラグと螺合するねじ部に残存す
る切粉やシール材等の異物がメイン通路や流体通路内に
混入し、絞り部材を閉塞したり軸受面に侵入して焼き付
きの原因となるおそれもある。The fluid pressure in the plurality of fluid pockets must be individually controlled to cope with fluctuations in radial load and the like.
One throttle member cannot be shared by a plurality of fluid pockets. In the conventional fluid bearing disclosed in the above publication, the fluid passages provided with the throttle members are formed in a single row in the axial direction along the main passage. Therefore, when the number of fluid pockets is increased, the same number of fluid pockets is required. In securing the space for forming the fluid passage, the axial length of the bearing metal becomes longer than necessary,
There is a problem that the fluid bearing becomes large. When the plug and the throttle member are connected to each other so that the throttle member can be replaced by changing the specification of the bearing or the like, when the plug is attached or detached, the cutting remaining on the plug or the threaded portion to be screwed with the plug is performed. Foreign matter such as powder or a sealing material may enter the main passage or the fluid passage, block the throttle member or invade the bearing surface to cause seizure.
【０００４】そこで本考案は、上記の問題点に鑑み、軸
受本体の大きさを小形化することができ、かつ絞り部材
の交換時等に作動流体中に異物が混入しない流体軸受を
提供することを目的とする。[0004] In view of the above problems, the present invention provides a fluid bearing that can reduce the size of the bearing body and that does not contain foreign matter in the working fluid when the throttle member is replaced. With the goal.
【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
に本考案は、軸受本体に内嵌保持される軸受メタルを備
え、該軸受メタルの軸受面に形成した複数個の流体ポケ
ット部に供給される非圧縮性の作動流体の圧力により回
転軸を支承する流体軸受であって、軸受本体にこれら流
体ポケット部に作動流体を供給する複数個の流体通路を
形成して、該各流体通路に各々絞り部材を介設するもの
において、軸受本体の端面に、軸受メタルの外周面に対
向するように周方向に間隔を存して複数個の凹孔を形成
し、上記複数個の流体通路を各々該各凹孔を介して各流
体通路の上流側の部分と下流側の部分とが連通されるよ
うに形成し、該各凹孔に各絞り部材を挿入すると共に、
該各絞り部材に該各凹孔の軸受本体端面の開口部を閉鎖
する栓部を一体に形成し、かつ軸受本体に該各絞り部材
の栓部に当接して該各絞り部材を各凹孔内に押圧固定す
る押圧部材を取り付け、更に上記流体通路の下流側の部
分の圧力を検出する検出ポートを設けたことを特徴とす
る。In order to achieve the above object, the present invention comprises a bearing metal which is fitted and held in a bearing body, and supplies a plurality of fluid pockets formed on a bearing surface of the bearing metal. A fluid bearing for supporting a rotating shaft by the pressure of an incompressible working fluid, wherein a plurality of fluid passages for supplying a working fluid to these fluid pockets are formed in a bearing body, and each of the fluid passages is formed. in those interposed each stop member, the end face of the bearing body, against the outer circumferential surface of the bearing metal
A plurality of recesses are formed at intervals in the circumferential direction so as to face each other, and the plurality of fluid passages are respectively provided with an upstream portion and a downstream portion of each fluid passage through each of the recesses. Are formed so as to communicate with each other, and while inserting each aperture member into each of the concave holes,
A plug for closing the opening of the bearing body end face of each of the recesses is formed integrally with each of the throttle members, and the respective throttle members are brought into contact with the stoppers of the respective throttle members on the bearing body so that the respective throttle members are formed with the respective recesses. A pressure member for pressing and fixing the inside of the fluid passage is attached , and furthermore, a downstream portion of the fluid passage.
A detection port for detecting the minute pressure .
【０００６】[0006]
【作用】本考案による流体軸受では、各流体ポケット毎
に設けられる絞り部材を、軸受本体の端面に周方向に間
隔を存して形成した複数個の凹孔に挿入固定したので、
流体ポケットが多数設けられても軸受メタルの軸方向の
長さが必要以上に延長されることはない。また、絞り部
材に各凹孔の軸受本体端面の開口部を閉鎖する栓部を一
体に形成すると共に、該絞り部材を押圧部材にて押圧固
定したので、異物が残留しやすいねじ部を栓部や凹孔に
設ける必要がなく、従って作動流体中に異物が混入する
おそれがない。尚、上記流体通路の下流側の圧力によっ
て回転軸を軸受メタルに接触しないように支承している
ので、作動流体の圧力が減少すると回転中の回転軸が軸
受メタルに接触し焼き付くおそれが生じる。そこで、上
記検出ポートを設けて作動流体の圧力が低下した場合に
直ちに回転停止等の措置を採り得るようにした。また、
軸受本体の端面に、軸受メタルの外周面に対向するよう
に周方向に間隔を存して複数個の凹孔を形成し、その凹
孔に絞り部材を挿入することにより絞り部材が軸受メタ
ルの外周面を囲むように配置される。これにより、絞り
部材を取り付けても軸受メタルの取り付けに必要な長さ
以上にならない。 In the fluid bearing according to the present invention, the throttle member provided for each fluid pocket is inserted and fixed in a plurality of recesses formed at intervals in the circumferential direction on the end face of the bearing body.
Even if a large number of fluid pockets are provided, the axial length of the bearing metal will not be unnecessarily extended. Also, the stopper member is integrally formed with a stopper for closing the opening of the end face of the bearing body of each recess, and the stopper member is pressed and fixed by the pressing member. There is no need to provide the working fluid in the working fluid. Note that the pressure on the downstream side of the fluid passage
The rotating shaft is supported so that it does not contact the bearing metal.
Therefore, when the pressure of the working fluid decreases, the rotating shaft
There is a risk of burning due to contact with the receiving metal. So, on
If the pressure of the working fluid drops
Immediate measures such as stopping rotation were taken. Also,
The end face of the bearing body should face the outer peripheral surface of the bearing metal.
A plurality of concave holes are formed at intervals in the circumferential direction
By inserting the throttle member into the hole, the throttle member
It is arranged so as to surround the outer peripheral surface of the tool. This allows the aperture
The length required for mounting the bearing metal even if the member is mounted
No more.
【０００７】[0007]
【実施例】本考案の一実施例について以下に図を用いて
説明する。１は本考案による流体軸受の軸受本体であ
り、該軸受本体１は、鋳鉄製の外筒２と、該外筒２に挿
入され、一端に設けられたフランジ部３０にて複数個の
ボルト３０ａにより該外筒２に締結される炭素鋼製の内
筒３とからなり、該内筒３の内周面にはスピンドル軸５
を軸承する鉛青銅鋳物製の軸受メタル４が焼きばめ等に
より嵌入されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a bearing body of a fluid bearing according to the present invention. The bearing body 1 includes a cast iron outer cylinder 2 and a plurality of bolts 30a inserted into the outer cylinder 2 by a flange portion 30 provided at one end. And an inner cylinder 3 made of carbon steel fastened to the outer cylinder 2 with a spindle shaft 5 on the inner peripheral surface of the inner cylinder 3.
A bearing metal 4 made of a lead-bronze casting is fitted by shrink fitting or the like.
【０００８】該外筒２の周方向上部には作動油が供給さ
れるオイル供給口２１が設けられており、該オイル供給
口２１は内筒３の外周面に刻設された環状溝３５に連通
している。そして、該環状溝３５は、軸受メタル４の内
周の軸受面に形成した複数個のオイルポケット４１と該
軸受メタル４のスラスト面４２に設けたオイルポケット
４３とに各々個別のオイル通路を介して連通されてお
り、これを詳述するに、該内筒３のフランジ部３０側の
端面に所定の円周上に周方向に間隔を存して複数個の凹
孔３１を形成し環状溝３５を内筒３に形成した各オイル
通路の上流側部分を構成する軸方向の各連通孔３１ａを
介して各凹孔３１に連通させ、更に、これら凹孔３１の
うち図２でＲにて示すものは該凹孔３１から放射方向内
方に延びる各オイル通路の下流側部分を構成する各連通
ポート３１ｃを介してオイルポケット４１に各々連通さ
れており、Ｓにて示すものは放射状内方向に延びる連通
ポート３１ｄと軸受メタル４に形成した軸方向の連通孔
４２ａを介して軸受メタル４のスラスト面４２に設けら
れたオイルポケット４３に連通されている。また、フラ
ンジ部３０の周面にはこれら各凹孔３１から放射方向外
方に延びる各検出ポート３１ｂが開設されており、該各
検出ポート３１ｂに図外の圧力センサに連なる検出管３
３が接続されいる。そしてこれら凹孔３１の各々には、
該凹孔３１の開口部を閉鎖する栓部６１と連通孔３１ａ
からの作動油を絞る絞り部６２とを備えた絞り部材６が
挿入され、該絞り部材６は該内筒３にボルト３２ａによ
り締結される押圧部材であるリング部材３２の環状突起
３２ｂにより押さえられ、該絞り部材６の先端面６３を
凹孔３１と連通孔３１ａとの段差部３５ｂに当接させ該
内筒３から抜け落ちないように押圧固定されている。ま
た、該絞り部材６の栓部６１側の端面には該絞り部材６
を凹孔３１から抜き出すための抜きタップ６４が設けら
れている。尚、本実施例ではＲに示すものを５個、Ｓに
示すものを２個設けた。ところで、上記スピンドル軸５
の左側端面には砥石（図示せず）の取り付け座となるキ
ャップ５１が締結されており、かつ、該キャップ５１は
上記リング部材３２と協働してラビリンスシールを構成
し、外部から流体軸受内への研削油等の侵入を防止する
ように構成されている。An oil supply port 21 to which hydraulic oil is supplied is provided at the upper part in the circumferential direction of the outer cylinder 2. The oil supply port 21 is formed in an annular groove 35 formed on the outer peripheral surface of the inner cylinder 3. Communicating. The annular groove 35 is formed between a plurality of oil pockets 41 formed on the inner peripheral bearing surface of the bearing metal 4 and an oil pocket 43 provided on the thrust surface 42 of the bearing metal 4 through respective oil passages. In detail, a plurality of concave holes 31 are formed in a predetermined circumference on the end surface of the inner cylinder 3 on the flange portion 30 side at intervals in the circumferential direction. 35 communicates with the respective recesses 31 through respective axial communication holes 31a constituting the upstream portion of the respective oil passages formed in the inner cylinder 3. Further, among these recesses 31, in FIG. Those shown in the figure communicate with the oil pockets 41 via the respective communication ports 31c constituting the downstream portion of each oil passage extending radially inward from the concave hole 31, and those shown in S represent radially inward directions. To the communication port 31d and bearing metal 4 Communicates with the oil pocket 43 provided on the thrust surface 42 of the bearing metal 4 through the axial passage 42a which form. Further, on the peripheral surface of the flange portion 30, each detection port 31b extending radially outward from each of the concave holes 31 is opened, and each of the detection ports 31b is connected to a detection pipe 3 connected to a pressure sensor (not shown).
3 is connected. And in each of these concave holes 31,
A plug portion 61 for closing the opening of the concave hole 31 and a communication hole 31a
A throttle member 6 having a throttle portion 62 for narrowing the hydraulic oil from above is inserted, and the throttle member 6 is pressed by the annular projection 32b of the ring member 32 which is a pressing member fastened to the inner cylinder 3 by a bolt 32a. The distal end surface 63 of the aperture member 6 is brought into contact with a step 35b between the concave hole 31 and the communication hole 31a, and is pressed and fixed so as not to fall out of the inner cylinder 3. The end surface of the throttle member 6 on the side of the plug 61 is provided with the throttle member 6.
A tap 64 is provided for pulling out from the concave hole 31. In the present embodiment, five pieces shown by R and two pieces shown by S are provided. By the way, the spindle shaft 5
A cap 51 serving as a mounting seat for a grindstone (not shown) is fastened to the left end face of the fluid bearing. The cap 51 cooperates with the ring member 32 to form a labyrinth seal. It is configured to prevent intrusion of grinding oil and the like into the inside.
【０００９】上記構成によれば、複数個の絞り部材６が
軸受本体１の端面に周方向に間隔を存して配設されるの
で軸受メタル４の軸方向の長さが必要以上に長くなるこ
とがなく流体軸受本体を小形化することができ、また、
絞り部材６は凹孔３１の開口端を閉鎖した状態でリング
部材３２により押圧固定されるので、該凹孔３１の開口
端をプラグを用いて閉鎖する必要がなく、作動油内にね
じ部に残存する切粉等の異物が混入する心配がない。According to the above configuration, the plurality of throttle members 6 are arranged on the end face of the bearing main body 1 at intervals in the circumferential direction, so that the axial length of the bearing metal 4 becomes longer than necessary. The fluid bearing body can be reduced in size without
Since the aperture member 6 is pressed and fixed by the ring member 32 in a state where the opening end of the concave hole 31 is closed, it is not necessary to close the open end of the concave hole 31 using a plug. There is no concern that foreign matter such as remaining chips may be mixed.
【００１０】ところで、上記実施例では軸受本体１と軸
受メタル４との嵌着力を保持しつつ該軸受メタル４の交
換性を向上させるため、該軸受本体１を外筒２と内筒３
との内外２重構造に構成したが、軸受本体１を単一の筒
状体で構成して、これに軸受メタル４を直接嵌入しても
良い。尚この場合には、上記環状溝３５を軸受本体１の
軸受メタル４が嵌入される円筒穴内周面に予め刻設して
おく。In the above embodiment, the bearing body 1 is connected to the outer cylinder 2 and the inner cylinder 3 in order to improve the exchangeability of the bearing metal 4 while maintaining the fitting force between the bearing body 1 and the bearing metal 4.
However, the bearing main body 1 may be formed of a single cylindrical body, and the bearing metal 4 may be directly fitted therein. In this case, the annular groove 35 is engraved in advance on the inner peripheral surface of the cylindrical hole of the bearing body 1 in which the bearing metal 4 is fitted.
【００１１】[0011]
【考案の効果】以上の説明から明らかなように、本考案
による流体軸受は、必要以上に大型化することがない。
また、絞り部材の交換時等に作動流体中に異物が混入し
ないので、焼付き等のおそれがない。更に、検出ポート
により作動流体の圧力を検出しているので万一圧力が低
下して回転軸が軸受けメタルに接触するおそれが生じて
も直ちに回転停止等の措置を採ることができる。 As is clear from the above description, the hydrodynamic bearing according to the present invention does not become unnecessarily large.
In addition, since no foreign matter is mixed into the working fluid when the throttle member is replaced or the like, there is no possibility of seizure or the like. In addition, detection ports
The pressure of the working fluid is detected by the
And the rotating shaft may come into contact with the bearing metal.
In addition, measures such as stopping rotation can be taken immediately.
【図１】 本考案の一実施例の構成を示す図FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.
【図２】 図１におけるII−II断面図FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】 絞り部材の取り付け状態を示す拡大断面図FIG. 3 is an enlarged sectional view showing an attached state of a diaphragm member.
１ 軸受本体 ２ 外筒 ３ 内筒 ４ 軸受メタル ５ スピンドル軸 ６ 絞り部材 ３１ 凹孔 ３２ リング部材 ４１ オイルポケット ６１ 栓部 ３１ａ 連通孔（流体通路の上流側） ３１ｃ・３１ｄ 連通ポート（流体通路の下流側）３３ 検出管 ３１ｂ 検出ポート DESCRIPTION OF SYMBOLS 1 Bearing main body 2 Outer cylinder 3 Inner cylinder 4 Bearing metal 5 Spindle shaft 6 Throttle member 31 Concave hole 32 Ring member 41 Oil pocket 61 Plug part 31a Communication hole (upstream side of fluid passage) 31c / 31d Communication port (downstream of fluid passage) Side) 33 Detection tube 31b Detection port
───────────────────────────────────────────────────── フロントページの続き (72)考案者 小松 哲治 埼玉県狭山市新狭山１丁目10番地１ ホ ンダエンジニアリング株式会社内 (56)参考文献 特開 平３−249424（ＪＰ，Ａ) 実開 昭51−83544（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsuharu Komatsu 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (56) References JP-A-3-249424 (JP, A) Sho Akai 51-83544 (JP, U)
Claims (1)
を備え、該軸受メタルの軸受面に形成した複数個の流体
ポケット部に供給される非圧縮性の作動流体の圧力によ
り回転軸を支承する流体軸受であって、軸受本体にこれ
ら流体ポケット部に作動流体を供給する複数個の流体通
路を形成して、該各流体通路に各々絞り部材を介設する
ものにおいて、軸受本体の端面に、軸受メタルの外周面
に対向するように周方向に間隔を存して複数個の凹孔を
形成し、上記複数個の流体通路を各々該各凹孔を介して
各流体通路の上流側の部分と下流側の部分とが連通され
るように形成し、該各凹孔に各絞り部材を挿入すると共
に、該各絞り部材に該各凹孔の軸受本体端面の開口部を
閉鎖する栓部を一体に形成し、かつ軸受本体に該各絞り
部材の栓部に当接して該各絞り部材を各凹孔内に押圧固
定する押圧部材を取り付け、更に上記流体通路の下流側
の部分の圧力を検出する検出ポートを設けたことを特徴
とする流体軸受。1. A rotating shaft is supported by a pressure of an incompressible working fluid supplied to a plurality of fluid pockets formed on a bearing surface of the bearing metal. A fluid bearing, in which a plurality of fluid passages for supplying a working fluid to these fluid pockets are formed in a bearing body, and a throttle member is interposed in each of the fluid passages. , Bearing metal outer peripheral surface
A plurality of recesses are formed at intervals in the circumferential direction so as to be opposed to each other, and the plurality of fluid passages are respectively provided on the upstream portion and the downstream portion of each fluid passage via the respective recess. Are formed so as to communicate with each other, and each of the throttle members is inserted into each of the concave holes, and a plug portion for closing the opening of the bearing body end face of each of the concave holes is integrally formed with each of the throttle members, And, a pressing member is attached to the bearing body to abut against the plug portion of each of the throttle members and press and fix the respective throttle members into the respective recesses, and further, on the downstream side of the fluid passage.
A fluid detection bearing provided with a detection port for detecting the pressure of the portion .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991066198U JP2569348Y2 (en) | 1991-08-21 | 1991-08-21 | Fluid bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991066198U JP2569348Y2 (en) | 1991-08-21 | 1991-08-21 | Fluid bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0517227U JPH0517227U (en) | 1993-03-05 |
| JP2569348Y2 true JP2569348Y2 (en) | 1998-04-22 |
Family
ID=13308915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991066198U Expired - Lifetime JP2569348Y2 (en) | 1991-08-21 | 1991-08-21 | Fluid bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2569348Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6851146B2 (en) * | 2016-05-24 | 2021-03-31 | ユニバーサル製缶株式会社 | Fluid bearing abnormality detection device and abnormality detection method |
| JP2017210996A (en) * | 2016-05-24 | 2017-11-30 | ユニバーサル製缶株式会社 | Orifice removable structure of fluid bearing |
| CN114857174B (en) * | 2022-06-16 | 2023-07-04 | 中国工程物理研究院机械制造工艺研究所 | Anti-disturbance restrictor for hydrostatic bearing and hydrostatic guideway |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS503854A (en) * | 1973-05-16 | 1975-01-16 |
-
1991
- 1991-08-21 JP JP1991066198U patent/JP2569348Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517227U (en) | 1993-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |