JP2001208063A - Porous hydrostatic bearing - Google Patents
Porous hydrostatic bearingInfo
- Publication number
- JP2001208063A JP2001208063A JP2000013010A JP2000013010A JP2001208063A JP 2001208063 A JP2001208063 A JP 2001208063A JP 2000013010 A JP2000013010 A JP 2000013010A JP 2000013010 A JP2000013010 A JP 2000013010A JP 2001208063 A JP2001208063 A JP 2001208063A
- Authority
- JP
- Japan
- Prior art keywords
- porous
- housing
- porous ring
- bearing
- thrust
- 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
Links
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、径方向に突出した
フランジ部を有する回転軸の外径部およびフランジ部の
両側のスラスト面にそれぞれ対向する多孔質部材からな
る軸受部材に圧縮気体を供給し、気体の膜を形成して回
転軸のフランジ部、さらには外径部をフローティング状
態で回転自在に支承する多孔質静圧軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a compressed gas to a bearing member comprising a porous member opposed to an outer diameter portion of a rotary shaft having a radially protruding flange portion and thrust surfaces on both sides of the flange portion. Further, the present invention relates to a porous hydrostatic bearing that forms a gas film and rotatably supports a flange portion and an outer diameter portion of a rotating shaft in a floating state.
【０００２】[0002]
【従来の技術】この種の従来の多孔質静圧軸受として、
図３に示すようなものがある。これはハウジング１の内
径面１ｂに実質的に１個の円筒とされたスリーブ２０
が、スリーブ２０の外径面の両端部に設けた溝にそれぞ
れ配設した２個のＯリング３，３を介して弾性支持され
ている。このスリーブ２０は、４個の同一外径のスリー
ブ部材２０Ａないし２０Ｄを一体に接合したもので、内
面に多孔質部材からなる複数個のラジアル軸受４，４と
１対のスラスト軸受１２，１２とが組み込まれて取り付
けられている。そして、ハウジング１の軸心部に中空の
軸５がそれぞれのラジアル軸受４およびスラスト軸受1
２に図示されない僅かな隙間を介して回転自在に取り付
けられている。2. Description of the Related Art As a conventional porous hydrostatic bearing of this kind,
There is one as shown in FIG. This is a substantially cylindrical sleeve 20 on the inner surface 1b of the housing 1.
Are elastically supported via two O-rings 3, 3 provided in grooves provided at both ends of the outer diameter surface of the sleeve 20, respectively. The sleeve 20 is formed by integrally joining four sleeve members 20A to 20D having the same outer diameter, and has a plurality of radial bearings 4, 4 made of a porous member on the inner surface and a pair of thrust bearings 12, 12, Is installed and mounted. A hollow shaft 5 is provided at the axial center of the housing 1 with the radial bearing 4 and the thrust bearing 1.
2 is rotatably mounted via a small gap (not shown).
【０００３】ハウジング１の胴部には、ハウジング外面
１ａから内径面１ｂに貫通する１本の給気孔６が形成さ
れている。スリーブ２０の外径面２０ａはハウジング１
の内径面１ｂより小径で、両面間に２個のＯリング３，
３で封じられた環状の空間からなる給気室２１が設けら
れている。スリーブ２０の構成部材である円筒状のスリ
ーブ部材２０Ａには内径面の軸方向端部に中央部より大
径の環状凹部２２が設けられ、その環状凹部２２内に
は、２個のラジアル軸受４がそれぞれ固定して取り付け
られている。１個のスリーブ部材２０Ａに軸方向に離し
て固着された２個のラジアル軸受４，４は、その軸受面
４ａを同時加工して同軸度が確保されている。A single air supply hole 6 is formed in the body of the housing 1 so as to extend from the outer surface 1a of the housing to the inner surface 1b. The outer diameter surface 20a of the sleeve 20 is the housing 1
2 O-rings 3 between the both sides with a smaller diameter than the inner diameter surface 1b
An air supply chamber 21 composed of an annular space sealed by 3 is provided. The cylindrical sleeve member 20A which is a constituent member of the sleeve 20 is provided with an annular concave portion 22 having a larger diameter than the central portion at the axial end portion of the inner diameter surface, and two radial bearings 4 in the annular concave portion 22. Are fixedly attached. The two radial bearings 4, 4 fixed to one sleeve member 20A at a distance in the axial direction have their bearing surfaces 4a simultaneously machined to ensure coaxiality.
【０００４】各ラジアル軸受４の外径面には浅い周溝が
給気室２４として形成され、両給気室２１，２４を連通
させる給気孔２５がスリーブ部材２０Ａを半径方向に貫
通してそれぞれ設けられている。一方、軸５には、２個
のラジアル軸受４，４間に位置し、軸外周面から軸５の
軸心に設けられている中空軸孔５ａに連通する排気孔７
が設けられ、ラジアル軸受４の軸受面から噴出した圧縮
気体をその排気孔７から排気するようになっている。[0004] A shallow circumferential groove is formed as an air supply chamber 24 on the outer diameter surface of each radial bearing 4, and an air supply hole 25 communicating the two air supply chambers 21, 24 penetrates through the sleeve member 20 A in the radial direction. Is provided. On the other hand, the shaft 5 has an exhaust hole 7 located between the two radial bearings 4 and 4 and communicating with the hollow shaft hole 5 a provided in the shaft center of the shaft 5 from the shaft outer peripheral surface.
Is provided, and the compressed gas ejected from the bearing surface of the radial bearing 4 is exhausted from the exhaust hole 7.
【０００５】軸５をスラスト方向に拘束する１対のスラ
スト軸受１２，１２は、いずれも一方のラジアル軸受４
から軸方向に離れて配設され、軸５の一端側部に突設し
たフランジ部１０の平面状のスラスト面１１，１１を挟
持している。Each of the pair of thrust bearings 12, 12 for restraining the shaft 5 in the thrust direction has one radial bearing 4.
The axial thrust surfaces 11, 11 of the flange portion 10 protrudingly provided at one end of the shaft 5 are sandwiched between the axially separated thrust surfaces.
【０００６】即ち、一方のスラスト軸受１２は、環状の
スリーブ部材２０Ｂの内径面に設けた凹部に嵌合して取
り付けられている。このスリーブ部材２０Ｂをスリーブ
部材２０Aの一端部に固着し、軸５をラジアル軸受４に
嵌合させている。軸５のフランジ部１０の厚さに１対の
スラスト軸受隙間を加えた厚さの環状のスリーブ部材２
０Cをスリーブ部材２０Ｂの端面に固着し、更にそのス
リーブ部材２０Cの端面に別のスリーブ部材２０Dを固着
する。このスリーブ部材２０Dには前記スリーブ部材２
０Ｂとは勝手違いに設けた凹部に他方のスラスト軸受１
２が嵌合固着され、一方のスラスト軸受と他方のスラス
ト軸受は軸方向に離れている。That is, one thrust bearing 12 is fitted and attached to a concave portion provided on the inner diameter surface of the annular sleeve member 20B. The sleeve member 20B is fixed to one end of the sleeve member 20A, and the shaft 5 is fitted to the radial bearing 4. An annular sleeve member 2 having a thickness obtained by adding a pair of thrust bearing clearances to the thickness of the flange portion 10 of the shaft 5.
OC is fixed to the end surface of the sleeve member 20B, and another sleeve member 20D is further fixed to the end surface of the sleeve member 20C. The sleeve member 2D is provided with the sleeve member 2 described above.
0B and the other thrust bearing 1
2 are fitted and fixed, and one thrust bearing and the other thrust bearing are separated in the axial direction.
【０００７】スリーブ部材２０Ｂとスリーブ部材２０D
には、外径面からスラスト軸受１２に至る半径方向の給
気口３０がそれぞれ設けてある。また、軸５のフランジ
部１０には、スラスト軸受１２の平面状の軸受面１２ａ
から噴出した圧縮気体を排気する排気孔３１が半径方向
および軸方向にそれぞれ設けられ、これらの排気孔３１
は中空軸孔５ａに連通している。The sleeve member 20B and the sleeve member 20D
Are provided with air supply ports 30 in the radial direction from the outer diameter surface to the thrust bearing 12. A flat bearing surface 12 a of the thrust bearing 12 is provided on the flange portion 10 of the shaft 5.
Exhaust holes 31 are provided in the radial direction and the axial direction, respectively, for exhausting the compressed gas ejected from the nozzle.
Communicates with the hollow shaft hole 5a.
【０００８】各スリーブ部材２０Aないし２０Dの互いの
固着手段としては、ねじ止め、接着、溶接等のいずれで
も良く、スリーブ２０は剛体となっている。こうしてス
ラスト軸受１２の軸受面１２ａが軸のフランジ部１０の
スラスト面１１に軸受隙間を介して対向するスラスト軸
受１２がラジアル軸受４と一体化して形成され、軸５を
ラジアル方向およびスラスト方向に支持する静圧軸受ブ
ロックが形成される。この静圧軸受ブロックの両端面に
Ｏリング３３，３３を配置してハウジング１の内径面に
挿入した後にハウジング１の一端に蓋３２を取り付けて
固定する。The means for fixing the sleeve members 20A to 20D to each other may be any of screwing, bonding, welding and the like, and the sleeve 20 is a rigid body. Thus, the thrust bearing 12 in which the bearing surface 12a of the thrust bearing 12 is opposed to the thrust surface 11 of the flange portion 10 of the shaft via the bearing gap is formed integrally with the radial bearing 4, and supports the shaft 5 in the radial and thrust directions. A static pressure bearing block is formed. O-rings 33, 33 are arranged on both end surfaces of the hydrostatic bearing block, and inserted into the inner diameter surface of the housing 1. Then, a lid 32 is attached to one end of the housing 1 and fixed.
【０００９】これによれば、２個のラジアル軸受４，４
と一対のスラスト軸受１２，１２とを実質的に一体のス
リーブ２０に一体的に固定して取付けたブロックをハウ
ジング１に装着して組み立てるので、各軸受の組立およ
び調整が簡単にできるとされている。According to this, two radial bearings 4, 4
And a pair of thrust bearings 12 and 12 are integrally fixed to a substantially integral sleeve 20 and mounted on the housing 1 to assemble them, so that assembly and adjustment of each bearing can be easily performed. I have.
【００１０】[0010]
【発明が解決しょうとする課題】しかしながら、スラス
ト軸受１２について見ると、このスラスト軸受１２はフ
ランジ部１０のスラスト面１１に対向する端面の全体が
軸受面１２ａの全体を形成するように構成されている。
ところで、スラスト軸受１２を形成している多孔質部材
は強度が低いため、高い軸受強度を得ることができな
い。その上、大形の多孔質部材を必要とするため、価格
的にも高価であった。However, looking at the thrust bearing 12, the thrust bearing 12 is constructed such that the entire end face of the flange portion 10 facing the thrust face 11 forms the entire bearing face 12a. I have.
By the way, since the strength of the porous member forming the thrust bearing 12 is low, a high bearing strength cannot be obtained. In addition, since a large-sized porous member is required, the cost is high.
【００１１】本発明の目的は、前述のような多孔質静圧
軸受が価格的に高価となるばかりでなく、強度的に弱か
ったという欠点を取り除き、強度的に強く、高価な多孔
質部材を少なくした多孔質静圧軸受を提供することに有
る。An object of the present invention is to eliminate the disadvantage that the above-described porous hydrostatic bearing is not only expensive but also weak in strength, and to provide a porous member that is strong in strength and expensive. It is an object of the present invention to provide a porous hydrostatic bearing with reduced number.
【００１２】[0012]
【課題を解決するための手段】前述の目的を達成するた
め本発明は、径方向に突出したフランジ部を有する回転
軸を支承する多孔質静圧軸受において、この軸受の外側
を構成するハウジングと、前記フランジ部のスラスト面
に対向すべく前記ハウジングに固定された非多孔質のリ
ング状部材の前記スラスト面に対向する平面内に、少な
くとも２つの多孔質リング状部材を同心円状に配置して
なるスラスト軸受部材と、前記ハウジングに設けた給気
孔から前記多孔質リング状部材に圧縮気体を供給するよ
うに成した気体通路と、を有してなる多孔質静圧軸受と
した。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a porous hydrostatic bearing for supporting a rotating shaft having a radially protruding flange portion. At least two porous ring-shaped members are concentrically arranged in a plane facing the thrust surface of a non-porous ring-shaped member fixed to the housing so as to face the thrust surface of the flange portion. And a gas passage formed to supply compressed gas from the air supply hole provided in the housing to the porous ring-shaped member.
【００１３】これにより価格的に高価な多孔質の軸受部
材の量が減り、２つの多孔質リング状部材の間には非多
孔質のリング状部材よる軸受面が存在するため、強度的
に強くなった。As a result, the amount of the porous bearing member which is expensive in price is reduced, and the bearing surface of the non-porous ring member exists between the two porous ring members. became.
【００１４】なお、前記スラスト軸受部材を有するとと
もに、それぞれ等しい内外径を有する多孔質リング状部
材と非多孔質リング状部材を軸方向に交互に複数個重ね
て一体的に形成され、前記ハウジングに嵌着固定されて
前記回転軸の外径部を回転自在に支承するラジアル軸受
部材を有するものとすれば、上記スラスト軸受部材のみ
ならず、ラジアル軸受部材についても、同様の作用効果
が得られる。このラジアル軸受部材は、両端に非多孔質
リング状部材が配置されていることが好ましい。In addition to the thrust bearing member, a plurality of porous ring-shaped members and non-porous ring-shaped members having the same inner and outer diameters are alternately stacked in the axial direction and integrally formed, and are formed integrally with the housing. If a radial bearing member that is fitted and fixed and rotatably supports the outer diameter portion of the rotary shaft is provided, the same operation and effect can be obtained not only for the thrust bearing member but also for the radial bearing member. This radial bearing member preferably has non-porous ring-shaped members disposed at both ends.
【００１５】[0015]
【発明の実施の形態】以下本発明の実施の形態を図１な
いし図２により説明する。ハウジング部材５０Aないし
５０Cからなるハウジング５０の内径面には、フランジ
部５１を有する回転軸５２の外径部を回転自在に支承す
るブロンズ、カーボンまたはセラミックス等の多孔質材
からなるリング状部材５３と鋼材などの非多孔質材から
なるリング状部材５４を軸方向に交互に複数個重ねて構
成した３組のラジアル軸受部材５５，５５，５５が冷や
し嵌め等により嵌合固着されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. A ring-shaped member 53 made of a porous material such as bronze, carbon, or ceramics rotatably supports an outer diameter portion of a rotating shaft 52 having a flange portion 51 on an inner diameter surface of the housing 50 formed of the housing members 50A to 50C. Three sets of radial bearing members 55, 55, 55 each formed by alternately stacking a plurality of ring-shaped members 54 made of a non-porous material such as a steel material in the axial direction are fitted and fixed by cold fitting or the like.
【００１６】各ラジアル軸受部材５５は、非多孔質リン
グ状部材５４を軸方向の両端に位置させて多孔質リング
状部材５３と非多孔質リング状部材５４が交互に軸方向
に配列され、予めねじ止め、接着、溶接等により一体化
し、その外径を所定寸法に研削加工して上記のようにハ
ウジング５０の内径面に冷やし嵌め等により嵌合固着さ
れている。なお、個々の多孔質リング状部材５３と非多
孔質リング状部材５４を順次ハウジング５０の内径面に
冷やし嵌め等により嵌合固着して各ラジアル軸受部材５
５を形成してもよい。上記のようにハウジング５０に嵌
合固着された各ラジアル軸受部材５５の内径面を所定寸
法に研削加工してラジアル方向軸受面５６を形成する。In each radial bearing member 55, the non-porous ring members 54 are positioned at both ends in the axial direction, and the porous ring members 53 and the non-porous ring members 54 are alternately arranged in the axial direction. The housing 50 is integrated by screwing, bonding, welding, or the like, and the outer diameter is ground to a predetermined size, and is fitted and fixed to the inner diameter surface of the housing 50 by cold fitting or the like as described above. Each of the porous ring members 53 and the non-porous ring members 54 are successively fitted and fixed to the inner surface of the housing 50 by cold fitting or the like.
5 may be formed. The radial bearing surface 55 is formed by grinding the inner diameter surface of each radial bearing member 55 fitted and fixed to the housing 50 to a predetermined dimension as described above.
【００１７】回転軸５２のフランジ部５１のスラスト面
に対向するハウジング部材５０Ａ，５０Ｃの端面にはリ
ング状の凹部５７が設けられ、この凹部５７内にスラス
ト軸受部材５８が図示しないボルトなどにより取り付け
られている。スラスト軸受部材５８は、鋼材などの非多
孔質材からなり、図２に示すように、リング状をした非
多孔質リング状部材５９と、この非多孔質リング状部材
５９に設けられた２つの多孔質リング状部材６０，６０
とからなっている。A ring-shaped concave portion 57 is provided on an end surface of the housing member 50A, 50C facing the thrust surface of the flange portion 51 of the rotary shaft 52, and a thrust bearing member 58 is mounted in the concave portion 57 by a bolt (not shown). Have been. The thrust bearing member 58 is made of a non-porous material such as steel, and as shown in FIG. 2, a ring-shaped non-porous ring-shaped member 59 and two non-porous ring-shaped members 59 provided on the non-porous ring-shaped member 59. Porous ring member 60, 60
It consists of
【００１８】上記多孔質リング状部材６０は、ブロン
ズ、カーボンまたはセラミックス等の多孔質材からな
り、回転軸５２のフランジ部５１のスラスト面に対向す
る非多孔質リング状部材５９の端面中に同心円状に設け
られた２つのリング状の溝内に接着または溶接などによ
り取り付けるか、または該溝内で焼結して多孔質リング
状部材６０を形成すると同時に非多孔質リング状部材５
９に接合するようにしてもよい。多孔質リング状部材６
０の表面は、研削加工などにより非多孔質リング状部材
５９の表面と面一に形成され、スラスト方向軸受面６１
を形成している。The porous ring-shaped member 60 is made of a porous material such as bronze, carbon or ceramic, and has a concentric circle formed in the end surface of the non-porous ring-shaped member 59 facing the thrust surface of the flange portion 51 of the rotating shaft 52. Or a non-porous ring-shaped member 5 which is attached to the two ring-shaped grooves provided in the shape by bonding or welding, or is sintered in the groove to form the porous ring-shaped member 60.
9 may be joined. Porous ring member 6
0 is formed flush with the surface of the non-porous ring-shaped member 59 by grinding or the like, and a thrust-direction bearing surface 61 is formed.
Is formed.
【００１９】ハウジング５０は図示しないボルト等によ
りハウジング部材５０Aないし５０Cを一体的に取付けて
あり、ハウジング５０の外径面に設けた給気孔６２から
給気通路６３，６４を経て、各ラジアル軸受部材５５の
多孔質リング状部材５３の外径面と各スラスト軸受部材
５８の多孔質リング状部材６０の裏側にそれぞれ設けら
れた環状室６５，６６へ連通し、続いて各多孔質リング
状部材５３，６０からそれぞれの軸受面５６，６１と回
転軸５２の外径面の間δおよびフランジ部５１のスラス
ト面の間αからそれぞれの気体溜め６７，６８を経て排
気通路６９，７０よりハウジング５０の外面にある排気
孔７１に連通する気体通路が設けてある。なお、図１に
おいて左端と右端のラジアル軸受部材５５の間δの左端
と右端は、それぞれ大気に開放されている。The housing 50 has housing members 50A through 50C integrally attached thereto by bolts or the like (not shown). Each radial bearing member passes through an air supply passage 63, 64 from an air supply hole 62 provided on an outer diameter surface of the housing 50. The outer peripheral surface of the porous ring member 55 and the annular chambers 65 and 66 provided on the back side of the porous ring member 60 of each thrust bearing member 58 communicate with each other. , 60 between the respective bearing surfaces 56, 61 and the outer diameter surface of the rotating shaft 52 and α between the thrust surfaces of the flange portion 51, through the respective gas reservoirs 67, 68 and the exhaust passages 69, 70 to the housing 50. A gas passage communicating with the exhaust hole 71 on the outer surface is provided. In FIG. 1, the left end and the right end of δ between the left end and the right end radial bearing member 55 are open to the atmosphere.
【００２０】次に、以上のように構成された多孔質静圧
軸受の作用について述べると、ハウジング５０内に矢印
ａのように導入された圧縮気体は給気通路６３および６
４から環状室６５および６６に入り、ラジアル軸受部材
５５の多孔質リング状部材５３およびスラスト軸受部材
５８の多孔質リング状部材６０からそれぞれラジアル方
向およびスラスト方向の軸受面５６および６１と回転軸
５２の外径面およびスラスト面の間δおよびαに導か
れ、気体膜を形成させ回転軸５２を回転自在に支承し、
次いで気体溜め６７，６８から排気通路６９，７０を経
て排気孔７１からハウジング５０外へ排出される。Next, the operation of the porous hydrostatic bearing configured as described above will be described. The compressed gas introduced into the housing 50 as shown by the arrow a is supplied to the supply passages 63 and 6.
4 and enters the annular chambers 65 and 66 from the porous ring-shaped member 53 of the radial bearing member 55 and the porous ring-shaped member 60 of the thrust bearing member 58, respectively, in the radial and thrust bearing surfaces 56 and 61 and the rotating shaft 52. Is guided between the outer diameter surface and the thrust surface by δ and α to form a gas film and rotatably support the rotating shaft 52,
Next, the gas is discharged from the gas reservoirs 67 and 68 to the outside of the housing 50 through the exhaust holes 71 through the exhaust passages 69 and 70.
【００２１】上記の各スラスト軸受部材５８は、２つの
多孔質リング状部材６０とこれらにより囲まれた部分に
所定の静圧力を発生する。そこで、２つの多孔質リング
状部材６０の幅を小さく抑えても、これらの半径方向の
間隔を大きくすることにより、広範囲にわたって静圧力
を発生させることができる。そして、２つの多孔質リン
グ状部材６０の間の軸受面を形成している非多孔質リン
グ状部材５９は、多孔質リング状部材６０の表面と面一
に形成されているため、多孔質リング状部材６０ととも
に軸受荷重を受けるが、非多孔質リング状部材５９は、
多孔質リング状部材６０より機械的強度が高いため、ス
ラスト軸受部材５８の軸受強度を高めることができる。Each of the above-mentioned thrust bearing members 58 generates a predetermined static pressure in two porous ring-shaped members 60 and a portion surrounded by these members. Therefore, even if the width of the two porous ring-shaped members 60 is suppressed to be small, it is possible to generate a static pressure over a wide range by increasing the distance between them in the radial direction. The non-porous ring-shaped member 59 forming the bearing surface between the two porous ring-shaped members 60 is formed flush with the surface of the porous ring-shaped member 60. Although the bearing load is received together with the ring-shaped member 60,
Since the mechanical strength is higher than that of the porous ring-shaped member 60, the bearing strength of the thrust bearing member 58 can be increased.
【００２２】また、各ラジアル軸受部材５５も、２つの
多孔質リング状部材５３とこれらにより囲まれた部分に
所定の静圧力を発生する。そこで、２つの多孔質リング
状部材５３の幅を小さく抑えても、これらの間にある非
多孔質リング状部材５４の幅を大きくすることにより、
広範囲にわたって静圧力を発生させることができるとと
もに、上記スラスト軸受部材５８と同様に軸受強度を高
めることができる。Each of the radial bearing members 55 also generates a predetermined static pressure in the two porous ring members 53 and a portion surrounded by these members. Therefore, even if the width of the two porous ring-shaped members 53 is reduced, the width of the non-porous ring-shaped member 54 between them is increased,
The static pressure can be generated over a wide range, and the bearing strength can be increased similarly to the thrust bearing member 58.
【００２３】なお、本発明は、前述した実施の形態に限
定されるものではなく、特許請求の範囲の各請求項に記
載の範囲内において種々変形実施可能であることは言う
までもない。It is needless to say that the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims.
【００２４】[0024]
【発明の効果】以上説明したように請求項１の発明によ
れば、当初に揚げた欠点を解消し、強度的に強く、価格
の高い多孔質材が少量で済む多孔質静圧軸受となった。
また、請求項２の発明によれば、請求項１の対象である
スラスト軸受部材のみならず、ラジアル軸受部材につい
ても、同様の作用効果が得られ、さらに、請求項３の発
明によれば、請求項２の発明による多孔質静圧軸受の製
造組立および本軸受への回転軸の組み付けを的確に行う
ことができる効果が得られる。As described above, according to the first aspect of the present invention, there is provided a porous hydrostatic bearing which eliminates the drawbacks which were initially fried, is strong in strength, and requires only a small amount of an expensive porous material. Was.
According to the second aspect of the invention, not only the thrust bearing member as the object of the first aspect but also the radial bearing member can obtain the same operation and effect. Further, according to the third aspect of the invention, According to the second aspect of the present invention, it is possible to obtain an effect that the manufacturing and assembly of the porous hydrostatic bearing and the assembling of the rotating shaft to the main bearing can be accurately performed.
【図１】本発明の一実施形態例を示す多孔質静圧軸受の
軸方向断面図である。FIG. 1 is an axial sectional view of a porous hydrostatic bearing showing an embodiment of the present invention.
【図２】図１のＡ‐Ａ線による断面図である。FIG. 2 is a cross-sectional view taken along line AA of FIG.
【図３】従来の多孔質静圧軸受の軸方向断面図である。FIG. 3 is an axial sectional view of a conventional porous hydrostatic bearing.
５０ ハウジング ５１ フランジ部 ５２ 回転軸 ５３ 多孔質リング状部材 ５４ 非多孔質リング状部材 ５５ ラジアル軸受部材 ５６ 軸受面 ５７ 凹部 ５８ スラスト軸受部材 ５９ 非多孔質リング状部材 ６０ 多孔質リング状部材 ６１ 軸受面 ６２ 給気孔 ６３，６４ 給気通路 ６５，６６ 環状室 ６７，６８ 気体溜め ６９，７０ 排気通路 ７１ 排気孔 Reference Signs List 50 housing 51 flange portion 52 rotating shaft 53 porous ring member 54 non-porous ring member 55 radial bearing member 56 bearing surface 57 recess 58 thrust bearing member 59 non-porous ring member 60 porous ring member 61 bearing surface 62 air supply holes 63, 64 air supply passages 65, 66 annular chambers 67, 68 gas reservoirs 69, 70 exhaust passages 71 exhaust holes
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芹澤 光明 静岡県沼津市大岡2068の３ 東芝機械株式 会社内 (72)発明者 木村 誠司 静岡県沼津市大岡2068の３ 東芝機械株式 会社内 Ｆターム(参考） 3J102 AA02 BA03 BA19 CA15 CA16 EA02 EA06 EA18 FA08 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuaki Serizawa 2068-3, Ooka, Numazu-shi, Shizuoka Toshiba Machine Co., Ltd. (72) Inventor Seiji Kimura 2068, Ooka, Numazu-shi, Shizuoka Toshiba Machine F-term ( Reference) 3J102 AA02 BA03 BA19 CA15 CA16 EA02 EA06 EA18 FA08
Claims (3)
転軸を支承する多孔質静圧軸受において、 この軸受の外側を構成するハウジングと、 前記フランジ部のスラスト面に対向すべく前記ハウジン
グに固定された非多孔質のリング状部材の前記スラスト
面に対向する平面内に、少なくとも２つの多孔質リング
状部材を同心円状に配置してなるスラスト軸受部材と、 前記ハウジングに設けた給気孔から前記多孔質リング状
部材に圧縮気体を供給するように成した気体通路と、 を有することを特徴とする多孔質静圧軸受。1. A porous hydrostatic bearing for supporting a rotary shaft having a radially protruding flange portion, comprising: a housing constituting an outer side of the bearing; and a housing fixed to the housing so as to face a thrust surface of the flange portion. A thrust bearing member in which at least two porous ring-shaped members are concentrically arranged in a plane opposed to the thrust surface of the non-porous ring-shaped member, and an air supply hole provided in the housing. And a gas passage configured to supply compressed gas to the porous ring-shaped member.
に、それぞれ等しい内外径を有する多孔質リング状部材
と非多孔質リング状部材を軸方向に交互に複数個重ねて
一体的に形成され、前記ハウジングに嵌着固定されて前
記回転軸の外径部を回転自在に支承するラジアル軸受部
材を有することを特徴とする請求項１記載の多孔質静圧
軸受。2. A housing having the thrust bearing member, a plurality of porous ring-shaped members and a plurality of non-porous ring-shaped members having the same inner and outer diameters are alternately stacked in the axial direction to be integrally formed, and the housing is formed integrally with the housing. 2. The porous hydrostatic bearing according to claim 1, further comprising a radial bearing member that is fitted and fixed and rotatably supports an outer diameter portion of the rotating shaft.
質リング状部材が配置されていることを特徴とする請求
項２記載の多孔質静圧軸受。3. The porous hydrostatic bearing according to claim 2, wherein said radial bearing member has a non-porous ring-shaped member disposed at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000013010A JP2001208063A (en) | 2000-01-21 | 2000-01-21 | Porous hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000013010A JP2001208063A (en) | 2000-01-21 | 2000-01-21 | Porous hydrostatic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001208063A true JP2001208063A (en) | 2001-08-03 |
Family
ID=18540665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000013010A Pending JP2001208063A (en) | 2000-01-21 | 2000-01-21 | Porous hydrostatic bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001208063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533956A (en) * | 2015-01-22 | 2015-04-22 | 哈尔滨工业大学 | Active compensation type low-swirl shaft-driven air bearing |
| JP2019523360A (en) * | 2016-06-28 | 2019-08-22 | 杭州万辰机電科技有限公司Ｈａｎｇｚｈｏｕ Ｓｔｅｌｌａｒ Ｍｅｃｈａｎｉｃａｌ ＆ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． | Centrifugal compressor assembly and its operating method by air conditioner |
-
2000
- 2000-01-21 JP JP2000013010A patent/JP2001208063A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533956A (en) * | 2015-01-22 | 2015-04-22 | 哈尔滨工业大学 | Active compensation type low-swirl shaft-driven air bearing |
| JP2019523360A (en) * | 2016-06-28 | 2019-08-22 | 杭州万辰机電科技有限公司Ｈａｎｇｚｈｏｕ Ｓｔｅｌｌａｒ Ｍｅｃｈａｎｉｃａｌ ＆ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． | Centrifugal compressor assembly and its operating method by air conditioner |
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