JPH11182547A - Rotary electric equipment having magnetic bearing - Google Patents
Rotary electric equipment having magnetic bearingInfo
- Publication number
- JPH11182547A JPH11182547A JP34597397A JP34597397A JPH11182547A JP H11182547 A JPH11182547 A JP H11182547A JP 34597397 A JP34597397 A JP 34597397A JP 34597397 A JP34597397 A JP 34597397A JP H11182547 A JPH11182547 A JP H11182547A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- wedge
- magnetic bearing
- bearing
- 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.)
- Withdrawn
Links
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
- F16C39/00—Relieving load on bearings
- F16C39/02—Relieving load on bearings using mechanical means
-
- 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
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、磁気軸受を有する
回転電機であって、危急軸受を除いたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine having a magnetic bearing, excluding an emergency bearing.
【０００２】[0002]
【従来の技術】磁気軸受は、電磁力による力を利用して
軸を非接触にて支持するものであり、図６に例示される
ように、固定子６Ｓ及び回転子６Ｒからなる電動機６の
軸方向両側にラジアル磁気軸受１，２が備えられ、片方
の磁気軸受２の側方にスラスト磁気軸受３が配置され、
更にシャフト４の両側には電源消失や制御装置の故障等
により磁気軸受１，２，３が効かなくなった場合に役立
つ危急軸受５が備えられている。また、図６にて、７は
回転軸位置制御用の位置検出器である。2. Description of the Related Art A magnetic bearing uses an electromagnetic force to support a shaft in a non-contact manner. As illustrated in FIG. 6, a magnetic bearing 6 includes a stator 6S and a rotor 6R. Radial magnetic bearings 1 and 2 are provided on both sides in the axial direction, and a thrust magnetic bearing 3 is arranged on one side of one magnetic bearing 2.
Further, on both sides of the shaft 4, there are provided emergency bearings 5 which are useful when the magnetic bearings 1, 2, 3 become ineffective due to power loss, failure of the control device, or the like. In FIG. 6, reference numeral 7 denotes a position detector for controlling the position of the rotating shaft.
【０００３】かかる構造にあって、ラジアル磁気軸受
１，２は、図７に示す如き断面構成であり、励磁電源８
により例えば４個の電磁石１Ａ，１Ｂ，１Ｃ，１Ｄ及び
電磁石２Ａ，２Ｂ，２Ｃ，２Ｄを励磁して磁力によりシ
ャフト４を位置決めするものであり、位置は位置検出器
７により制御装置９への信号入力となって検知され、そ
の値に基づき励磁電源８による所望電磁石の励磁制御を
行なっている。In such a structure, the radial magnetic bearings 1 and 2 have a sectional structure as shown in FIG.
For example, the four electromagnets 1A, 1B, 1C, 1D and the electromagnets 2A, 2B, 2C, 2D are excited to position the shaft 4 by magnetic force, and the position is signaled to the control device 9 by the position detector 7. It is detected as an input, and the excitation power of the desired electromagnet is controlled by the excitation power supply 8 based on the detected value.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述の
構造にあっては、危急軸受５の設置が、必要不可欠であ
るために次のような問題が生じている。However, in the above-mentioned structure, since the installation of the emergency bearing 5 is indispensable, the following problems occur.
【０００５】すなわち、危急軸受５の設置のためのス
ペースを確保しなければならず、装置全体が大きなもの
となること、That is, it is necessary to secure a space for installing the emergency bearing 5, and the entire device becomes large.
【０００６】一般的にころがり軸受である危急軸受５
の設置により全軸長が長くなり、このためシャフト４の
危険速度も低下し、実用回転速度範囲としては数次の危
険速度が存在することになるため、危険速度付近の速度
での連続使用を避けあるいは磁気軸受の制御性を向上さ
せる方策が採られているが危険速度に到らないような抜
本的対策ではないこと、An emergency bearing 5 which is generally a rolling bearing
The length of the entire shaft becomes longer due to the installation of the shaft, so that the critical speed of the shaft 4 also decreases, and there are several critical speeds in the practical rotation speed range. Measures to avoid or improve the controllability of the magnetic bearings are taken, but they are not drastic measures that do not reach dangerous speeds,
【０００７】危急軸受５の周辺構造が複雑となって、
コストアップにつながること、である。[0007] The peripheral structure of the emergency bearing 5 becomes complicated,
That leads to higher costs.
【０００８】本発明は、上述の問題に鑑み、装置全体を
小形なものとし、軸長を短くすることで本来非接触によ
る高速回転を危険速度の次数を減じて達成できるように
し、危急軸受を不要としてコストダウンを図った磁気軸
受を有する回転電機を提供する。The present invention has been made in view of the above problems, and has been made to reduce the order of the critical speed by reducing the order of the critical speed by reducing the overall length of the device and shortening the shaft length. Provided is a rotating electric machine having a magnetic bearing that is unnecessary and reduces cost.
【０００９】[0009]
【課題を解決するための手段】上述の目的を達成する本
発明は、次の発明特定事項を有する。The present invention that achieves the above object has the following matters specifying the invention.
【００１０】（１）磁気軸受周表面、固定子内周表面、
及び回転子外周表面の少なくとも一つの軸方向に沿って
形成された溝に低摩擦係数の摺動部材を周表面より突出
させて収納したことを特徴する。(1) Magnetic bearing peripheral surface, stator inner peripheral surface,
And a sliding member having a low friction coefficient is housed in a groove formed along at least one axial direction of a rotor outer peripheral surface so as to protrude from the peripheral surface.
【００１１】（２）上記（１）において、上記摺動部材
は、コイルが収納された上記溝であるスロットルに嵌め
込まれるくさびであることを特徴とする。(2) In the above (1), the sliding member is a wedge fitted into a throttle which is the groove in which the coil is housed.
【００１２】（３）上記（１）又は（２）において、上
記摺動部材は、上記周表面に対応したリング状に形成
し、上記溝に対応してこのリング状より突起を形成した
ことを特徴とする。(3) In the above (1) or (2), the sliding member is formed in a ring shape corresponding to the peripheral surface, and a projection is formed from the ring shape corresponding to the groove. Features.
【００１３】[0013]
【発明の実施の形態】ここで、図１〜図５を参照して本
発明の実施の形態の一例につき述べる。全体構造として
は、本例も図６と同様であるが、本例では図６の危急軸
受５は設けられない。本例においては、危急軸受は不要
であり、その代り低摩擦係数の摺動部材、例えばテフロ
ン系の樹脂層を設けている。以下、一例としてテフロン
をあげて説明する。なお、図１〜図５にて図６と同一部
分には同符号を付す。An embodiment of the present invention will now be described with reference to FIGS. The overall structure of this embodiment is the same as that of FIG. 6, but the emergency bearing 5 of FIG. 6 is not provided in this embodiment. In this example, an emergency bearing is not required, and a sliding member having a low friction coefficient, for example, a Teflon-based resin layer is provided instead. Hereinafter, Teflon will be described as an example. 1 to 5, the same parts as those in FIG. 6 are denoted by the same reference numerals.
【００１４】図１は、電動機の固定子６Ｓの一部を示し
ており、図１（ａ）は一部斜視、図１（ｂ）はスロット
部分を示している。固定子６Ｓには、軸方向に沿って鉄
板が積層されて成層鉄心６ａを形成する。この成層鉄心
６ａの内周表面には軸方向にスロット６ｂが形成され、
コイル６ｃがその中に収納される。スロット６ｂの開口
部分はコイル６ｃの押えとしてくさび６ｄがライナ６ｅ
を介して嵌め込まれている。FIG. 1 shows a part of a stator 6S of an electric motor. FIG. 1 (a) shows a partial perspective view, and FIG. 1 (b) shows a slot part. Iron plates are laminated on the stator 6S along the axial direction to form a laminated core 6a. A slot 6b is formed in the inner peripheral surface of the laminated core 6a in the axial direction,
The coil 6c is housed therein. The opening of the slot 6b serves as a holder for the coil 6c, and a wedge 6d
It is fitted through.
【００１５】ここで、くざび６ｄは、テフロンにより形
成されており、しかもくさび６ｄが嵌め込まれた状態で
はくさび６ｄの表面が成層鉄心６ａの内周表面より突出
する（ギャップ面より出張る）ような厚さを有する。こ
の突出厚さは、例えば０．５ｍｍ程となっている。な
お、くさび６ｄの突出面側角（台形断面角）は面取りが
され、なめらかな曲がり具合となっている。Here, the wedge 6d is formed of Teflon, and when the wedge 6d is fitted, the surface of the wedge 6d protrudes from the inner peripheral surface of the laminated core 6a (travels from the gap surface). It has a great thickness. This protrusion thickness is, for example, about 0.5 mm. In addition, the protruding surface side angle (trapezoidal section angle) of the wedge 6d is chamfered so as to be smoothly bent.
【００１６】図１は、固定子６Ｓでのスロット６ｂ内に
嵌め込まれるくさび６ｄそれぞれをテフロンにて形成し
た例を示しているが、図２は回転子にあって、突起をリ
ング状につなげた構成を示すものである。つまり、回転
子６Ｒにあってその外周表面を囲むような大きさのテフ
ロンをリング状に形成し、そのリング状に溝（スロット
６ｂでもよい）に対応してダブテイルに形成されたくさ
びに当る突起６ｄが一体に形成されたものである。した
がって、かかる構造では突起６ｄ（くさび）が全周にわ
たりまんべんなく一度に嵌め込まれることになる。FIG. 1 shows an example in which wedges 6d to be fitted in slots 6b of the stator 6S are formed of Teflon. FIG. 2 shows a rotor in which projections are connected in a ring shape. 2 shows the configuration. That is, a Teflon sized to surround the outer peripheral surface of the rotor 6R is formed in a ring shape, and the ring-shaped projection corresponding to the wedge formed in the dovetail corresponding to the groove (slot 6b may be used). 6d is integrally formed. Therefore, in such a structure, the projections 6d (wedges) are fitted all over the entire circumference at once.
【００１７】図１，図２は、具体例としてスロット又は
溝へのくさび６ｄをテフロンにて形成したものを従来の
危急軸受の代りにしたものであるが、更に図３に示すよ
うに回転子６Ｒの表面を削り込み溝を軸方形に形成しそ
の溝にテフロンの摺動部材を嵌め込み厚さ２００μｍ〜
５００μｍの出っ張り樹脂層を形成したものである。FIGS. 1 and 2 show a concrete example in which a wedge 6d for a slot or a groove is formed of Teflon in place of a conventional emergency bearing. As shown in FIG. The surface of 6R is cut off and a groove is formed in an axial square shape. A Teflon sliding member is fitted into the groove and the thickness is 200 μm or more.
A protruding resin layer of 500 μm was formed.
【００１８】また、図４は固定子６Ｓの表面を削り、図
３と同様テフロンの摺動部材を嵌め込んで一部出張らせ
たものである。FIG. 4 shows an example in which the surface of the stator 6S is cut off and a sliding member made of Teflon is fitted and traveled partially as in FIG.
【００１９】機械的ギャップ及び磁気ギャップに余裕が
あるときは、金属とテフロンとの接触面ではテフロンが
破損しやすいことを考慮して、回転子６Ｒ及び固定子６
Ｓの双方にテフロンの出張りを設けるようにしたもの
で、安定したシャフトの停止が行なわれる。When there is a margin in the mechanical gap and the magnetic gap, the rotor 6R and the stator 6R are considered in consideration of the fact that Teflon is easily damaged at the contact surface between the metal and Teflon.
The S is provided with a Teflon protrusion on both sides, so that the shaft can be stopped stably.
【００２０】上記図１〜図５においては電動機について
の構成を示したのであるが、図６に示す磁気軸受１，２
についても全く同様にテフロンを用いた図１〜図５の構
成とすることにより、危急軸受の代りとすることができ
る。FIGS. 1 to 5 show the structure of the electric motor, but the magnetic bearings 1 and 2 shown in FIG.
In the same manner, the configuration shown in FIGS. 1 to 5 using Teflon can be used instead of the emergency bearing.
【００２１】[0021]
【発明の効果】以上説明したように本発明では、磁気軸
受の回転子と固定子あるいは電動機の回転子と固定子の
少なくともいずれかにテフロン等の摺動部材を備えたこ
とにより、従来の如き危急軸受は不要となり、危急軸受
のスペースも不要となり、更には危急軸受の部品も削減
できることとなり、小型でコストが安くシャフトの長さ
も短くなって危険速度の次数を減ずることができる。As described above, according to the present invention, at least one of the rotor and the stator of the magnetic bearing or the rotor and the stator of the electric motor is provided with a sliding member such as Teflon, so that the conventional device is provided. The emergency bearing is not required, the space for the emergency bearing is not required, and the components of the emergency bearing can be reduced. Therefore, the size of the shaft is reduced, the cost is reduced, the length of the shaft is shortened, and the order of the critical speed can be reduced.
【図１】本発明の実施の形態の一例の構成図。FIG. 1 is a configuration diagram of an example of an embodiment of the present invention.
【図２】変形例の構成図。FIG. 2 is a configuration diagram of a modified example.
【図３】他の例の簡略構成図。FIG. 3 is a simplified configuration diagram of another example.
【図４】更に他の例の簡略構成図。FIG. 4 is a simplified configuration diagram of still another example.
【図５】その他の例の簡略構成図。FIG. 5 is a simplified configuration diagram of another example.
【図６】従来例の断面構成図。FIG. 6 is a cross-sectional configuration diagram of a conventional example.
【図７】磁気軸受の説明図。FIG. 7 is an explanatory view of a magnetic bearing.
１，２ 磁気軸受 ４ シャフト ６ 電動機 ６Ｓ 固定子 ６Ｒ 回転子 ６ｄ くさび 1, 2 Magnetic bearing 4 Shaft 6 Electric motor 6S Stator 6R Rotor 6d Wedge
Claims (3)
回転子外周表面の少なくとも一つの軸方向に沿って形成
された溝に低摩擦係数の摺動部材を周表面より突出させ
て収納した磁気軸受を有する回転電機。1. A sliding member having a low friction coefficient is housed in a groove formed along at least one axial direction of a magnetic bearing peripheral surface, a stator inner peripheral surface, and a rotor outer peripheral surface from the peripheral surface. Rotating electric machine having a magnetic bearing.
記溝であるスロットに嵌め込まれるくさびであることを
特徴とする請求項１記載の磁気軸受を有する回転電機。2. The rotating electric machine having a magnetic bearing according to claim 1, wherein said sliding member is a wedge fitted into a slot which is said groove in which a coil is housed.
リング状に形成し、上記溝に対応してこのリング状より
突起を形成したことを特徴とする請求項１又は２記載の
磁気軸受を有する回転電機。3. The magnetic device according to claim 1, wherein the sliding member is formed in a ring shape corresponding to the peripheral surface, and a protrusion is formed from the ring shape corresponding to the groove. A rotating electric machine having a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34597397A JPH11182547A (en) | 1997-12-16 | 1997-12-16 | Rotary electric equipment having magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34597397A JPH11182547A (en) | 1997-12-16 | 1997-12-16 | Rotary electric equipment having magnetic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11182547A true JPH11182547A (en) | 1999-07-06 |
Family
ID=18380275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34597397A Withdrawn JPH11182547A (en) | 1997-12-16 | 1997-12-16 | Rotary electric equipment having magnetic bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11182547A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007032443A1 (en) * | 2007-07-10 | 2009-01-15 | Voith Patent Gmbh | Hybrid bearing and method for its production |
| US20150054367A1 (en) * | 2011-09-13 | 2015-02-26 | Rolls-Royce Ab | Method of and a device for protecting a motor in a pod against shaft bending shocks |
-
1997
- 1997-12-16 JP JP34597397A patent/JPH11182547A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007032443A1 (en) * | 2007-07-10 | 2009-01-15 | Voith Patent Gmbh | Hybrid bearing and method for its production |
| US8330312B2 (en) | 2007-07-10 | 2012-12-11 | Voith Patent Gmbh | Hybrid bearing and method for the production thereof |
| US20150054367A1 (en) * | 2011-09-13 | 2015-02-26 | Rolls-Royce Ab | Method of and a device for protecting a motor in a pod against shaft bending shocks |
| US10361605B2 (en) * | 2011-09-13 | 2019-07-23 | Rolls-Royce Akteibolag | Method of and a device for protecting a motor in a pod against shaft bending shocks |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020117927A1 (en) | Electric rotary machine and power generation systems using the same | |
| JP4469670B2 (en) | Rotating electric machine | |
| JP2002122137A (en) | Bearing device | |
| US5744893A (en) | Brushless motor stator design | |
| JP4857802B2 (en) | Rotating electric machine | |
| JPH0586142B2 (en) | ||
| JP2005257075A (en) | Fluid dynamic pressure bearing system rotatingly supporting spindle motor | |
| JP2001190045A (en) | Magnetically levitated motor | |
| WO2018034247A1 (en) | Electric motor device | |
| JP3530910B2 (en) | Centrifugal motor pump | |
| JP3463336B2 (en) | Motor with electromagnetic brake | |
| JPH10108437A (en) | Switched reluctance motor | |
| JPH11182547A (en) | Rotary electric equipment having magnetic bearing | |
| JP5233196B2 (en) | Rotating electrical machine rotor | |
| JPH0946944A (en) | Rotor of electric motor | |
| WO2017221843A1 (en) | Electric linear actuator | |
| CN113508511B (en) | Axial gap type rotating electrical machine | |
| JPH08232955A (en) | Magnetic bearing | |
| JPH11178277A (en) | Motor with brake and opening and shutting body device provided with the motor | |
| CN113812072A (en) | Electric motor | |
| JP2010074979A (en) | Rotary motor | |
| JP2559029Y2 (en) | Motor stator structure | |
| JPH0686523A (en) | Commutator-less motor | |
| JPS6225859A (en) | Flat type brushless motor | |
| WO2021234994A1 (en) | Outer rotor-type rotating electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050301 |