JPH0213771Y2 - - Google Patents
Info
- Publication number
- JPH0213771Y2 JPH0213771Y2 JP1983098861U JP9886183U JPH0213771Y2 JP H0213771 Y2 JPH0213771 Y2 JP H0213771Y2 JP 1983098861 U JP1983098861 U JP 1983098861U JP 9886183 U JP9886183 U JP 9886183U JP H0213771 Y2 JPH0213771 Y2 JP H0213771Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- axis
- rotating shaft
- casing
- stator
- 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
- 230000005284 excitation Effects 0.000 description 4
- 230000004323 axial length Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
Description
【考案の詳細な説明】
本考案はケーシングに回転自在に支承した回転
軸の軸方向偏位を規正するスラスト磁気軸受に関
し、殊に回転時における危険速度を早めて高い回
転数を得るために曲げの固有振動数の高い回転軸
を構成し得るように、軸方向長さの短かいスラス
ト磁気軸受を提供することを目的とする。[Detailed description of the invention] The present invention relates to a thrust magnetic bearing that regulates the axial deviation of a rotating shaft rotatably supported in a casing. An object of the present invention is to provide a thrust magnetic bearing having a short axial length so that a rotating shaft with a high natural frequency can be constructed.
以下図面の実施例に基いて説明すると、符号1
は回転軸であつて図示しない軸受によつて回転自
在にケーシング2に支承してある。該回転軸1に
はロータ11が図示の如く一体に形成してある。
然して該ロータ11の軸線平行断面は付根部分が
太く先端は細い略々等脚台形状であつて、上記付
根部分と先端部分の両側に磁極面13,12が軸
直角になるように若干左右に突出して設けてあ
る。 The following description will be made based on the embodiments shown in the drawings.
is a rotating shaft, which is rotatably supported in the casing 2 by a bearing (not shown). A rotor 11 is integrally formed with the rotating shaft 1 as shown in the figure.
However, the axis-parallel cross section of the rotor 11 has an approximately isosceles trapezoidal shape with a thick base and a thin tip, and the magnetic pole surfaces 13 and 12 are arranged slightly left and right on both sides of the base and tip so that they are perpendicular to the axis. It is placed prominently.
一方前記ケーシング2には左右のステータ3,
4が間座5を挾んで(圧入)固設してある。該ス
テータの励磁コイル31,41は前記ロータ11
の斜面に対応するように図示のように軸線平行断
面を台形状とし、コイル巻線の占積率を高めてあ
る。即ち、ステータ3,4のロータ11への対向
面は軸線平行断面が略々等脚台形状である。上記
ステータ3の磁極面32,33は前記ロータ11
の磁極面12,13にそれぞれ僅かな空隙を隔
てゝ対峙する如く設けてあり、且つそれらの磁極
面が軸に垂直で、且つ若干突出している。ステー
タ4の磁極面も同様に形成してある。 On the other hand, the casing 2 includes left and right stators 3,
4 is fixed by sandwiching (press-fitting) the spacer 5. The excitation coils 31 and 41 of the stator are connected to the rotor 11.
As shown in the figure, the axis-parallel cross section is trapezoidal to correspond to the slope of the coil, increasing the space factor of the coil winding. That is, the surfaces of the stators 3 and 4 facing the rotor 11 have a substantially isosceles trapezoidal cross section parallel to the axis. The magnetic pole faces 32 and 33 of the stator 3 are connected to the rotor 11.
The magnetic pole faces 12 and 13 of the magnetic poles 12 and 13 are provided facing each other with a small gap between them, and the magnetic pole faces are perpendicular to the axis and protrude slightly. The magnetic pole face of the stator 4 is also formed in the same manner.
この構成の本考案スラスト磁気軸受も従来のも
のと同様に、図示しない軸方向偏位検出器と、左
右の励磁コイル31,41を上記検出器の偏位信
号に基いて個々に励磁制御する制御回路とを備
え、ロータ11と左右のステータ3,4との磁極
間距離C1,C2が予め設定した値になるように回
転軸の軸方向偏位を規制することができる。 The thrust magnetic bearing of the present invention having this configuration also includes an axial deviation detector (not shown) and excitation control of the left and right excitation coils 31, 41 individually based on the deviation signal of the detector. It is possible to regulate the axial deviation of the rotating shaft so that the distances C 1 and C 2 between the magnetic poles between the rotor 11 and the left and right stators 3 and 4 become preset values.
そして本考案のスラスト磁気軸受は、前記のよ
うにロータ11を回転軸1と一体に形成し、且つ
軸との付根部分を太くして機械的強度をもたせ、
先端を細くして回転遠心力による破壊を来さない
限度に該ロータの外径を大きくし、その分だけス
テータ3,4の励磁コイル31,41の軸方向ス
ペースを短かく構成してある。更に該コイル3
1,41の軸線平行断面を台形にしてコイル巻線
の占積率を高めたので、従来のもの(例えば特開
昭53−88443号公報開示のもの)に較べて同じ推
力負荷容量で軸方向長さを大幅に短縮することが
できる。一例を挙げればロータ外形90mm、軸方向
長さ63mmのものは外形100mm、長さ47.3mmにする
ことができる。これは25%の短縮であつて、これ
に応じて回転軸の軸受間距離も短かく、軸長も短
かくし得る故、曲げの固有振動数が高くなり、よ
り高速回転に堪える回転軸を得ることができる。 In the thrust magnetic bearing of the present invention, as described above, the rotor 11 is formed integrally with the rotating shaft 1, and the root part with the shaft is thickened to provide mechanical strength.
The outer diameter of the rotor is increased to the extent that the tip is made thinner so as not to cause damage due to rotational centrifugal force, and the axial space of the excitation coils 31 and 41 of the stators 3 and 4 is shortened accordingly. Furthermore, the coil 3
Since the axially parallel cross section of No. 1 and 41 is trapezoidal to increase the space factor of the coil winding, compared to conventional ones (for example, the one disclosed in Japanese Patent Application Laid-open No. 53-88443), the axially parallel cross section is made trapezoidal. The length can be significantly shortened. For example, a rotor with an outer diameter of 90 mm and an axial length of 63 mm can be made to have an outer diameter of 100 mm and a length of 47.3 mm. This is a 25% reduction, and the distance between the bearings of the rotating shaft can be shortened accordingly, and the shaft length can also be shortened, resulting in a rotating shaft that has a higher natural frequency of bending and can withstand higher speed rotation. be able to.
図は本願考案の一実施例を示す縦断面図であ
る。
符号の説明、1……回転軸、3,4……ステー
タ、11……ロータ。
The figure is a longitudinal sectional view showing an embodiment of the present invention. Explanation of symbols: 1...Rotating shaft, 3, 4...Stator, 11...Rotor.
Claims (1)
向偏位を規正するスラスト磁気軸受であつて、該
回転軸の外周に一体に半径方向に延びて形成した
環状のスラスト受け用ロータと、上記ロータの両
側に配置し、僅かな空隙を隔てゝ対峙する如く上
記ケーシングに固設したステータとを備え、前記
ロータの軸線平行断面が、軸との付根部分は太く
先端は細い略々等脚台形状であり、前記ステータ
のロータへの対向面は軸線平行断面が略々等脚台
形状であり、更に上記ロータ及びステータの磁極
面は軸に対して垂直面をなし、且つその部分が互
いに相手に向つて若干突出していることを特徴と
するスラスト磁気軸受。 A thrust magnetic bearing that regulates the axial deviation of a rotating shaft rotatably supported in a casing, which comprises: an annular thrust receiving rotor integrally formed on the outer periphery of the rotating shaft and extending in the radial direction; stators arranged on both sides and fixed to the casing so as to face each other with a slight gap in between, and a cross section parallel to the axis of the rotor is approximately in the shape of an isosceles trapezoid, with a thick base part to the shaft and a thin tip part. The surface of the stator facing the rotor has a substantially isosceles trapezoidal cross section parallel to the axis, and the magnetic pole surfaces of the rotor and stator are perpendicular to the axis, and their portions face each other. A thrust magnetic bearing characterized by a slightly protruding structure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9886183U JPS607424U (en) | 1983-06-28 | 1983-06-28 | thrust magnetic bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9886183U JPS607424U (en) | 1983-06-28 | 1983-06-28 | thrust magnetic bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS607424U JPS607424U (en) | 1985-01-19 |
JPH0213771Y2 true JPH0213771Y2 (en) | 1990-04-16 |
Family
ID=30234535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9886183U Granted JPS607424U (en) | 1983-06-28 | 1983-06-28 | thrust magnetic bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS607424U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0443625Y2 (en) * | 1987-01-13 | 1992-10-15 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5124653A (en) * | 1974-08-26 | 1976-02-28 | Teijin Ltd | HORIESUTERUSOSEIBUTSU |
US4180296A (en) * | 1978-01-06 | 1979-12-25 | Societe Europeenne De Propulsion | Axial electromagnetic bearing for a shaft rotating at high speed |
US4180946A (en) * | 1975-10-02 | 1980-01-01 | Maurice Brunet | Tool holding spindle assembly particularly for a grinding machine |
US4302061A (en) * | 1977-01-13 | 1981-11-24 | Societe Europeenne De Propulsion | Removable magnetic suspension system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5824648Y2 (en) * | 1978-12-28 | 1983-05-27 | 富士電機株式会社 | magnetic thrust bearing |
-
1983
- 1983-06-28 JP JP9886183U patent/JPS607424U/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5124653A (en) * | 1974-08-26 | 1976-02-28 | Teijin Ltd | HORIESUTERUSOSEIBUTSU |
US4180946A (en) * | 1975-10-02 | 1980-01-01 | Maurice Brunet | Tool holding spindle assembly particularly for a grinding machine |
US4302061A (en) * | 1977-01-13 | 1981-11-24 | Societe Europeenne De Propulsion | Removable magnetic suspension system |
US4180296A (en) * | 1978-01-06 | 1979-12-25 | Societe Europeenne De Propulsion | Axial electromagnetic bearing for a shaft rotating at high speed |
Also Published As
Publication number | Publication date |
---|---|
JPS607424U (en) | 1985-01-19 |
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