JPS6120735B2 - - Google Patents
Info
- Publication number
- JPS6120735B2 JPS6120735B2 JP3691579A JP3691579A JPS6120735B2 JP S6120735 B2 JPS6120735 B2 JP S6120735B2 JP 3691579 A JP3691579 A JP 3691579A JP 3691579 A JP3691579 A JP 3691579A JP S6120735 B2 JPS6120735 B2 JP S6120735B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- gas
- exhaust
- bearing
- air supply
- 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
Links
- 230000002706 hydrostatic effect Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
【発明の詳細な説明】
この発明は負荷容量および軸受剛性の高い静圧
ジヤーナル気体軸受に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydrostatic journal gas bearing with high load capacity and bearing rigidity.
従来の静圧ジヤーナル気体軸受は第１図および
第２図に示すように、オリフイス孔１ａを有する
スリーブ２ａを固定部材３ａに嵌合して固定し、
前記オリフイス孔１ａより噴出された軸受すきま
４ａ内の気体でスリーブ２ａに嵌合するように配
設された可動軸５ａを支持していた。 As shown in FIGS. 1 and 2, a conventional hydrostatic journal gas bearing is fixed by fitting a sleeve 2a having an orifice hole 1a into a fixing member 3a.
The movable shaft 5a, which is disposed to fit into the sleeve 2a, is supported by the gas in the bearing gap 4a that is ejected from the orifice hole 1a.
従つて軸受すきまの下部４１ａおよび軸受すき
まの上部４２ａ内の気体の圧力分布は第１図に矢
印で示すようになつており、軸受すきまの下部４
１ａ内の気体と軸受すきまの上部４２ａ内の気体
との差圧はそれほど大きくないので負荷容量およ
び軸受剛性はそれほど高くないという欠点があつ
た。 Therefore, the pressure distribution of the gas in the lower part 41a of the bearing clearance and the upper part 42a of the bearing clearance is as shown by the arrows in FIG.
Since the differential pressure between the gas in 1a and the gas in the upper part 42a of the bearing clearance is not so large, the load capacity and bearing rigidity are not very high.
この発明は負荷容量および軸受剛性の高い静圧
ジヤーナル気体軸受を提供することを目的とす
る。 An object of the present invention is to provide a hydrostatic journal gas bearing with high load capacity and bearing rigidity.
次にこの発明の実施例を図面に基いて説明す
る。第３図ないし第５図において、固定部材１の
内周面２にスリーブ３が嵌合して固定され、この
スリーブ３と固定部材１との間に中空の給気キヤ
ビテイ４が設けられ、この給気キヤビテイ４に給
気する給気孔５は固定部材１に設けられている。
前記スリーブの内周面６の非負荷圏側の面６１図
示の実施例では上側の面には排気用半周状みぞ７
が所要数条図示の実施例では三条設けられ、この
排気用半周状みぞ７内の気体は第５図に示すよう
にスリーブ３に設けた排気孔８によつて外部と連
通している。前記スリーブ３にはスリーブの内周
面の非負荷圏側の面６１と給気キヤビテイ４とを
連通するオリフイス孔１１がスリーブの一方の端
面９と隣の排気用半周状みぞ７との間、隣り合う
排気用半周状みぞ７の間、およびスリーブの他方
の端面１０と隣の排気用半周状みぞ７との間にそ
れぞれ設けられ、またスリーブ３にはスリーブの
内周面の負荷圏側の面６２と給気キヤビテイ(4)と
を連通するオリフイス孔１１が等間隔に所要数設
けられている。従つてスリーブ３には排気用半周
状みぞ７以外のスリーブの内周面６３と給気キヤ
ビテイ４とを連通するオリフイス孔１１が設けら
れており、またスリーブの内周面６には可動軸１
２が嵌合するように配設されている。 Next, embodiments of the present invention will be described based on the drawings. 3 to 5, a sleeve 3 is fitted and fixed to the inner peripheral surface 2 of the fixing member 1, and a hollow air supply cavity 4 is provided between the sleeve 3 and the fixing member 1. An air supply hole 5 for supplying air to the air supply cavity 4 is provided in the fixed member 1.
In the illustrated embodiment, a semicircular exhaust groove 7 is provided on the upper surface of the inner circumferential surface 6 of the sleeve on the non-load zone side.
In the illustrated embodiment, three grooves are provided, and the gas in the semicircular exhaust groove 7 is communicated with the outside through an exhaust hole 8 provided in the sleeve 3, as shown in FIG. The sleeve 3 has an orifice hole 11 that communicates the non-load area side surface 61 of the inner peripheral surface of the sleeve with the air supply cavity 4 between one end surface 9 of the sleeve and the adjacent semicircular exhaust groove 7; These grooves are provided between adjacent half-circumferential exhaust grooves 7 and between the other end surface 10 of the sleeve and the adjacent half-circumferential exhaust groove 7, and the sleeve 3 has grooves on the load zone side of the inner circumferential surface of the sleeve. A required number of orifice holes 11 communicating between the surface 62 and the air supply cavity (4) are provided at equal intervals. Therefore, the sleeve 3 is provided with an orifice hole 11 that communicates the inner circumferential surface 63 of the sleeve other than the exhaust half-circumferential groove 7 with the air supply cavity 4, and the inner circumferential surface 6 of the sleeve is provided with a movable shaft 1.
2 are arranged so that they fit together.
以上のような構成で給気孔５から給気キヤビテ
イ４に給気すると、給気キヤビテイ４内の気体は
オリフイス孔１１から可動軸１２に向つて噴出
し、スリーブの内周面６と可動軸１２との間に軸
受すきま１３が発生し、この軸受すきま１３内の
気体で可動軸１２を支持している。前記軸受すき
ま１３内の気体は排気用半周状みぞ７から排気孔
８を通つて外部に排気されると共にスリーブの両
端面９，１０と可動軸１２との間の排気すきま１
４，１５から外部に排気され、軸受すきまの下部
１３１内の気体の圧力分布および軸受すきまの上
部１３２内の気体の圧力分布は第３図に矢印で示
すようになつている。前記軸受すきまの上部１３
２内の気体の圧力は排気用半周状みぞ７近傍およ
び排気すきま１４，１５近傍が低くなつており、
軸受すきまの上部１３２内の気体の圧力は従来の
静圧ジヤーナル気体軸受より非常に低くなつてい
る。また軸受すきまの下部１３１内の気体の圧力
は従来の静圧ジヤーナル気体軸受とほぼ等しくな
つており、軸受すきまの下部１３１内の気体と軸
受すきまの上部１３２内の気体との差圧は非常に
大きいので負荷容量および軸受剛性の高い静圧ジ
ヤーナル気体軸受となつている。 When air is supplied to the air supply cavity 4 from the air supply hole 5 with the above configuration, the gas in the air supply cavity 4 is ejected from the orifice hole 11 toward the movable shaft 12, and the inner circumferential surface 6 of the sleeve and the movable shaft 12 A bearing clearance 13 is generated between the two, and the movable shaft 12 is supported by the gas within this bearing clearance 13. The gas in the bearing clearance 13 is exhausted to the outside from the semicircular exhaust groove 7 through the exhaust hole 8, and the exhaust clearance 1 between the sleeve end surfaces 9, 10 and the movable shaft 12
4 and 15, and the pressure distribution of the gas in the lower part 131 of the bearing clearance and the pressure distribution of the gas in the upper part 132 of the bearing clearance are as shown by the arrows in FIG. Upper part 13 of the bearing clearance
The pressure of the gas inside 2 is low near the semicircular exhaust groove 7 and near the exhaust gaps 14 and 15,
The pressure of the gas in the upper portion 132 of the bearing clearance is much lower than in conventional hydrostatic journal gas bearings. In addition, the pressure of the gas in the lower part 131 of the bearing clearance is almost equal to that of a conventional static pressure journal gas bearing, and the pressure difference between the gas in the lower part 131 of the bearing clearance and the gas in the upper part 132 of the bearing clearance is very large. Due to its large size, it is a hydrostatic journal gas bearing with high load capacity and bearing rigidity.
第６図および第７図はこの発明の他の実施例で
あるが、スリーブの内周面の負荷圏側の面６２に
は多孔質部材１１１が埋め込まれており、スリー
ブの内周面の負荷圏側の面６２と給気キヤビテイ
４とを連通するオリフイス孔１１は多孔性のオリ
フイス孔となつている。なおこの発明で言うオリ
フイス孔１１とは気体を噴出させる孔を言う。 6 and 7 show other embodiments of the present invention, a porous member 111 is embedded in a surface 62 of the inner peripheral surface of the sleeve on the load zone side, and a porous member 111 is embedded in the surface 62 of the inner peripheral surface of the sleeve. The orifice hole 11 that communicates the sphere side surface 62 and the air supply cavity 4 is a porous orifice hole. Note that the orifice hole 11 referred to in this invention refers to a hole through which gas is ejected.
この発明の静圧ジヤーナル気体軸受によると、
スリーブの内周面の非負荷圏側の面には排気用半
周状みぞが所要数条設けられ、前記排気用半周状
みぞ内の気体はスリーブに設けた排気孔によつて
外部と連通され、前記スリーブには排気用半周状
みぞ以外のスリーブの内周面と給気キヤビテイと
を連通するオリフイス孔が設けられているので、
軸受すきまの上部の気体の圧力は非常に低くな
り、軸受すきまの下部内の気体と軸受すきまの上
部内の気体との差圧が大きいので負荷容量および
軸受剛性が非常に高いという効果を有する。 According to the hydrostatic journal gas bearing of this invention,
A required number of half-circumferential exhaust grooves are provided on the inner circumferential surface of the sleeve on the non-load area side, and the gas in the semicircular exhaust grooves is communicated with the outside through an exhaust hole provided in the sleeve, Since the sleeve is provided with an orifice hole that communicates the inner peripheral surface of the sleeve other than the semicircular exhaust groove with the air supply cavity,
The pressure of the gas in the upper part of the bearing clearance is very low, and the difference in pressure between the gas in the lower part of the bearing clearance and the gas in the upper part of the bearing clearance is large, so the load capacity and bearing rigidity are very high.
第１図は従来の静圧ジヤーナル気体軸受の断面
図、第２図は第１図のＡ−Ｂの断面図、第３図は
この発明の一実施例を示す静圧ジヤーナル気体軸
受の断面図、第４図は第３図のＣ−Ｄの断面図、
第５図は第４図のＥ−Ｆの断面図、第６図はこの
発明の他の実施例を示す静圧ジヤーナル気体軸受
の断面図、第７図は第６図のＧ−Ｈの断面図であ
る。
図中、１は固定部材、２は固定部材の内周面、
３はスリーブ、４は給気キヤビテイ、６はスリー
ブの内周面、６１はスリーブの内周面の非負荷圏
側の面、６３は排気用半周状みぞ以外のスリーブ
の内周面、７は排気用半周状みぞ、８は排気孔、
１１はオリフイス孔、１２は可動軸、１３は軸受
すきまである。
Fig. 1 is a sectional view of a conventional hydrostatic journal gas bearing, Fig. 2 is a sectional view taken along line A-B in Fig. 1, and Fig. 3 is a sectional view of a hydrostatic journal gas bearing showing an embodiment of the present invention. , FIG. 4 is a sectional view taken along line C-D in FIG. 3,
5 is a cross-sectional view taken along line E-F in FIG. 4, FIG. 6 is a cross-sectional view of a hydrostatic journal gas bearing showing another embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line G-H in FIG. 6. It is a diagram. In the figure, 1 is a fixed member, 2 is an inner peripheral surface of the fixed member,
3 is the sleeve, 4 is the air supply cavity, 6 is the inner circumferential surface of the sleeve, 61 is the surface of the inner circumferential surface of the sleeve on the non-load area side, 63 is the inner circumferential surface of the sleeve other than the semicircular groove for exhaust, 7 is the inner circumferential surface of the sleeve Semi-circular groove for exhaust, 8 is an exhaust hole,
11 is an orifice hole, 12 is a movable shaft, and 13 is a bearing clearance.
Claims (1)
て固定され、前記固定部材１とスリーブ３との間
に中空の給気キヤビテイ４が設けられ、前記スリ
ーブ３にはスリーブの内周面６と給気キヤビテイ
４とを連通するオリフイス孔１１が設けられ、前
記オリフイス孔１１より噴出された軸受すきま１
３内の気体でスリーブの内周面６に嵌合するよう
に配設された可動軸１２を支持する静圧ジヤーナ
ル気体軸受において、前記スリーブの内周面の非
負荷圏側の面６１には排気用半周状みぞ７が所要
数条設けられ、前記排気用半周状みぞ７内の気体
はスリーブ３に設けた排気孔８によつて外部と連
通され、前記スリーブ３には排気用半周状みぞ以
外のスリーブの内周面６３と給気キヤビテイ４と
を連通するオリフイス孔１１が設けられているこ
とを特徴とする静圧ジヤーナル気体軸受。1 A sleeve 3 is fitted and fixed to the inner circumferential surface 2 of the fixing member 1, a hollow air supply cavity 4 is provided between the fixing member 1 and the sleeve 3, and the sleeve 3 has an inner circumference of the sleeve. An orifice hole 11 that communicates between the surface 6 and the air supply cavity 4 is provided, and the bearing clearance 1 emitted from the orifice hole 11 is provided.
In a hydrostatic journal gas bearing that supports a movable shaft 12 disposed so as to fit into an inner circumferential surface 6 of a sleeve with gas in the sleeve, a surface 61 of the inner circumferential surface of the sleeve on the non-load zone side has a A required number of exhaust semicircular grooves 7 are provided, and the gas in the exhaust semicircular grooves 7 is communicated with the outside through an exhaust hole 8 provided in the sleeve 3. A hydrostatic journal gas bearing characterized in that an orifice hole 11 is provided that communicates an inner circumferential surface 63 of a sleeve other than that with an air supply cavity 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3691579A JPS55129618A (en) | 1979-03-30 | 1979-03-30 | Static pressure gas bearing for journal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3691579A JPS55129618A (en) | 1979-03-30 | 1979-03-30 | Static pressure gas bearing for journal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55129618A JPS55129618A (en) | 1980-10-07 |
| JPS6120735B2 true JPS6120735B2 (en) | 1986-05-23 |
Family
ID=12483058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3691579A Granted JPS55129618A (en) | 1979-03-30 | 1979-03-30 | Static pressure gas bearing for journal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55129618A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS633756U (en) * | 1986-06-25 | 1988-01-11 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0518499Y2 (en) * | 1987-09-01 | 1993-05-17 |
-
1979
- 1979-03-30 JP JP3691579A patent/JPS55129618A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS633756U (en) * | 1986-06-25 | 1988-01-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55129618A (en) | 1980-10-07 |
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