JPS63190930A - Magnetic bearing device - Google Patents
Magnetic bearing deviceInfo
- Publication number
- JPS63190930A JPS63190930A JP62023268A JP2326887A JPS63190930A JP S63190930 A JPS63190930 A JP S63190930A JP 62023268 A JP62023268 A JP 62023268A JP 2326887 A JP2326887 A JP 2326887A JP S63190930 A JPS63190930 A JP S63190930A
- Authority
- JP
- Japan
- Prior art keywords
- bearings
- bearing
- rotor shaft
- protective
- rotating part
- 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.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 claims description 33
- 238000013459 approach Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 4
- 230000036316 preload Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005096 rolling process Methods 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
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
- F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、磁気軸受装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to a magnetic bearing device.
従来の技術とその問題点
磁気軸受装置として、固定ケースに対しロータ軸がラジ
アル磁気軸受およびアキシャル磁気軸受で非接触状態に
支持されて回転し、固定ケースの複数箇所に保護用軸受
(ころがり軸受)が設けられたものが知られている。保
護用軸受は、ロータ軸が停止するとき、停電その他の故
障により磁気軸受が作動しなくなったときまたはロータ
軸に振動が発生したときに、ロータ軸を受けて磁気軸受
を保護するためのものであり、ロータ軸が正常に回転し
ているときには、保護用軸受とロータ軸との間には0.
1〜数am程度のすきまがある。ところが、このすきま
は軸受が通常使用される場合のすきまより大きいため、
保護用軸受が作動するときに、ロータ軸の振れ回りが発
生し、軸受に圧痕などのダメージを与えたり、軸受内輪
とロータ軸の間でスリップが生じてこれらが焼付いたり
し、保護用軸受が−度の作動で使用不可能になるという
ような問題がある。Conventional technology and its problems As a magnetic bearing device, the rotor shaft rotates while being supported in a non-contact state by radial magnetic bearings and axial magnetic bearings against a fixed case, and protective bearings (rolling bearings) are installed at multiple locations on the fixed case. It is known that this is provided. The protective bearing is designed to protect the magnetic bearing by supporting the rotor shaft when the rotor shaft stops, when the magnetic bearing stops operating due to a power outage or other failure, or when vibration occurs in the rotor shaft. Yes, when the rotor shaft is rotating normally, there is 0.0% between the protective bearing and the rotor shaft.
There is a gap of about 1 to several am. However, this clearance is larger than the clearance when the bearing is normally used, so
When the protective bearing operates, the rotor shaft may whirl around, causing damage to the bearing such as dents, or slippage may occur between the bearing inner ring and the rotor shaft, causing them to seize. There is a problem that it becomes unusable due to - degree of operation.
磁気軸受装置には、上記のように固定ケースの内側をロ
ータ軸が回転する形式の他に、固定軸の周囲を筒状のロ
ータが回転する形式もあるが、この場合にも、同様に、
保護用軸受が作動するときにロータの振れ回りが発生す
るという問題がある。In addition to the type of magnetic bearing device in which the rotor shaft rotates inside a fixed case as described above, there is also a type in which a cylindrical rotor rotates around a fixed shaft, but in this case as well,
There is a problem in that the rotor whirls when the protective bearing operates.
この発明の目的は、上記の問題を解決し、ロータ軸また
は筒状のロータの振れ回りを防止できる磁気軸受装置を
提供することにある問題点を解決するための手段
この発明による磁気軸受装置は、
固定部分に対し回転部分がラジアル磁気軸受およびアキ
シャル磁気軸受で非接触状態に支持されて回転し、回転
部分の停止時に回転部分を受ける保護用軸受が固定部分
の複数箇所に設けられた磁気軸受装置において、
保護用軸受の回転部分側の軌道輪と回転部分に、保護用
軸受作動時に互いに接触するテーパ面が形成され、保護
用軸受がそのテーパ面によりスラスト荷重を受けるよう
に配置された玉軸受であり、回転部分をそのテーパ面が
保護用軸受のテーパ面に接近する方向に付勢する回転部
分付勢手段が設けられているものである。An object of the present invention is to solve the above problems and provide a magnetic bearing device that can prevent a rotor shaft or a cylindrical rotor from whirling. , A magnetic bearing in which the rotating part rotates while being supported by a radial magnetic bearing and an axial magnetic bearing in a non-contact manner with respect to the fixed part, and protective bearings are provided at multiple locations on the fixed part to receive the rotating part when the rotating part stops. In the device, a tapered surface is formed on the bearing ring on the rotating part side of the protective bearing and the rotating part, and the tapered surface contacts each other when the protective bearing is operated, and the protective bearing receives a thrust load from the tapered surface. The bearing is provided with rotating part biasing means for biasing the rotating part in a direction in which the tapered surface of the rotating part approaches the tapered surface of the protective bearing.
作 用
停電その他の故障により磁気軸受が作動しなくなった場
合、回転部分付勢手段の作用により、回転部分のテーパ
面が保護用軸受のテーパ面に接触し、回転部分と保護用
軸受の間のすきまがなくなる。このため、回転部分の振
れ回りが発生することがない。If the magnetic bearing stops operating due to a power outage or other malfunction, the tapered surface of the rotating portion comes into contact with the tapered surface of the protective bearing due to the action of the rotating portion biasing means, and the gap between the rotating portion and the protective bearing is There will be no gaps. Therefore, whirling around the rotating part does not occur.
また、回転中の回転部分に外部から振動が加わったよう
な場合は、磁気軸受への通電を停止すれば、同様に、回
転部分付勢手段の作用により、回転部分の振れ回りが防
止される。Additionally, if vibration is applied to the rotating part from the outside, if the power to the magnetic bearing is stopped, the rotating part biasing means will similarly prevent the rotating part from whirling around. .
実 施 例 第1図は、第1実施例を示す。Example FIG. 1 shows a first embodiment.
この磁気軸受装置は、垂直円筒状の固定ケース(10)
の内側を垂直なロータ軸(11)が回転する形式のもの
である。ロータ軸(11)には−上下1対のフランジ(
12)(13)が形成され、各フランジ(12) (1
3)の外周には斜め下向きのテーパ面(+2a)(13
a)が形成されている。また、ロータ軸(11)の下端
部にはディスク(14)が形成されている。ケース(1
0)には、軸(11)の上部を支持するラジアル磁気軸
受(15) (16)、ディスク(14)の部分を支持
するアキシャル磁気軸受(17)(18)および高周波
モータ(19)が設けられている。ラジアル磁気軸受(
15) (1B)および上部アキシャル磁気軸受(17
)は電磁石(15a) (16a) (17a)を備え
、下部アキシャル磁気軸受り18)は永久磁石(18a
)を備えている。そして、ロータ軸(11)は、ラジア
ル磁気軸受(15) (16)およびアキシャル磁気軸
受(17)(18)でケース(10)に対し非接触状態
に支持され、たとえば30000 rpI11程度の高
速で回転する。This magnetic bearing device consists of a vertical cylindrical fixed case (10)
A vertical rotor shaft (11) rotates inside the rotor. The rotor shaft (11) has a pair of upper and lower flanges (
12) (13) are formed, each flange (12) (1
3) has a diagonally downward tapered surface (+2a) (13
a) is formed. Further, a disk (14) is formed at the lower end of the rotor shaft (11). Case (1
0) is equipped with radial magnetic bearings (15) (16) that support the upper part of the shaft (11), axial magnetic bearings (17) (18) that support the disk (14), and a high frequency motor (19). It is being Radial magnetic bearing (
15) (1B) and upper axial magnetic bearing (17
) is equipped with electromagnets (15a) (16a) (17a), and the lower axial magnetic bearing 18) is equipped with a permanent magnet (18a).
). The rotor shaft (11) is supported in a non-contact manner with respect to the case (10) by radial magnetic bearings (15) (16) and axial magnetic bearings (17) (18), and rotates at a high speed of, for example, 30,000 rpI11. do.
図示は省略したが、ケース(10)にはロータ軸(11
)のラジアル方向およびアキシャル方向の位置を検出す
るためのセンサーが設けられており、これらのセンサー
の出力に基づいて磁気軸受(15) (16) (17
)を制御することにより、ロータ軸(11)は一定位置
に支持されて回転する。ロータ軸(11)の上下のフラ
ンジ(12) (13)に対応するケース(10)の上
下2箇所に保護用軸受(20)(21)が設けられてい
る。これらの保護用軸受(20) (21)の内輪(2
2)’(23)には、ロータ軸(11)のフランジ(1
2)(13)のテーパ面(12a) (13a)に対向
する斜め上向きのテーパ面(22a) (23a)が形
成されている。Although not shown, the case (10) has a rotor shaft (11
) are provided with sensors for detecting the radial and axial positions of the magnetic bearings (15) (16) (17) based on the outputs of these sensors.
), the rotor shaft (11) is supported at a fixed position and rotated. Protective bearings (20) and (21) are provided at two locations above and below the case (10) corresponding to the upper and lower flanges (12) and (13) of the rotor shaft (11). Inner rings (2) of these protective bearings (20) (21)
2)' (23) has a flange (1) of the rotor shaft (11).
2) Diagonally upward tapered surfaces (22a) (23a) are formed opposite to the tapered surfaces (12a) (13a) of (13).
保護用軸受(20)(21)はその内輪(22) (2
3)のテーパ面(22a> (23a)で下向きのスラ
スト荷重を受けるように配置されたアンギュラ玉軸受よ
りなり、これらの外輪(24) (25)がケース(1
0)に固定されたフランジ(2B)(27)にそれぞれ
固定されている。The protective bearings (20) (21) have inner rings (22) (2
These outer rings (24) and (25) are connected to the case (1).
0) are fixed to flanges (2B) and (27), respectively.
そして、ロータ軸(11〉が正常に回転しているときは
、ロータ軸(11)のフランジ(12) (13)のテ
ーパ面(L2a) (13a)と対応する保護用軸受(
20)(21)のテーパ面(22a) (23a)との
間にはたとえば0゜1〜数llll11程度のすきまか
ある。When the rotor shaft (11>) is rotating normally, the tapered surfaces (L2a) (13a) of the flanges (12) (13) of the rotor shaft (11)
20) There is a gap of about 0°1 to several lllll11 between the tapered surfaces (22a) and (23a) of (21).
停電その他の故障により電磁石(15a) (lea)
(17a)に通電されなくなって磁気軸受(t5)(
x6)(17)が作動しなくなった場合、ロータ軸(1
1)のディスク(14)が永久磁石(18a)により下
方に吸引され、この力と重力によりロータ軸(11)は
下方に移動し、ロータ軸(11)のテーパ面(12a)
(13a)が対応する保護用軸受(2(1) (21
)のテーパ面(22a)(23a)に圧接する。これに
よりロータ軸(11)と保護用軸受(20)(21)の
間のすきまがなくなり、ロータ軸(I l)は軸受(2
0)(21)に支持されて振れ回りを発生することなく
回転する。また、永久磁石の吸引力と重力により軸受(
20) (21)に予圧が与えられるから、軸受(20
)(21)とロータ軸(11)のスリップが発生しなく
なり、軸受(20) (21)およびロータ軸(11)
の寿命をのばすことができる。Electromagnet (15a) (lea) due to power outage or other failure
(17a) is no longer energized and the magnetic bearing (t5) (
x6) (17) stops working, the rotor shaft (1
The disk (14) of 1) is attracted downward by the permanent magnet (18a), and due to this force and gravity, the rotor shaft (11) moves downward, and the tapered surface (12a) of the rotor shaft (11)
(13a) corresponds to the protective bearing (2(1) (21
) into pressure contact with the tapered surfaces (22a) and (23a). This eliminates the gap between the rotor shaft (11) and the protective bearings (20) and (21), and the rotor shaft (I l)
0) (21) and rotates without whirling. Also, due to the attraction force of the permanent magnet and gravity, the bearing (
20) Since preload is applied to (21), bearing (20)
) (21) and the rotor shaft (11) will no longer occur, and the bearings (20) (21) and the rotor shaft (11) will no longer slip.
The lifespan of can be extended.
また、地震その他の外部からの振動により回転中のロー
タ軸(11)に振動が発生したような場合は、前記セン
サーによりこれを検知し、磁気軸受(15) (te)
(t7)の電磁石(15a) (16a) (17a
)への通電を停止する。このようにすれば、同様に、永
久磁石(18a)と重力の作用により、ロータ軸(11
)が保護用軸受(20)(21)に確実に支持されて、
振れ回りが防止される。In addition, if vibration occurs in the rotating rotor shaft (11) due to an earthquake or other external vibration, the sensor detects this and the magnetic bearing (15) (te)
(t7) Electromagnets (15a) (16a) (17a
). In this way, the rotor shaft (11
) is securely supported by the protective bearings (20) and (21),
Swivelling is prevented.
第2図は、第2実施例を示す。FIG. 2 shows a second embodiment.
この磁気軸受装置は、垂直な固定軸(30)の周囲を円
筒状のロータ(31)が回転する形式のもの”である。This magnetic bearing device is of a type in which a cylindrical rotor (31) rotates around a vertical fixed shaft (30).
ロータ(31)は、固定軸(30)に設けられたラジア
ル磁気軸受(32) (33)(34) (35)およ
びアキシャル磁気軸受(3B) (37)で非接触状態
に支持されて回転する。ラジアル磁気軸受(32) (
33) (34) (35)および上部アキシャル磁気
軸受(36)は電磁石(32a) (33a) (34
a) (35a) (38a)を備え、下部アキシャル
磁気軸受(37)は永久磁石(37a)を備えている。The rotor (31) rotates while being supported in a non-contact manner by radial magnetic bearings (32) (33) (34) (35) and axial magnetic bearings (3B) (37) provided on the fixed shaft (30). . Radial magnetic bearing (32) (
33) (34) (35) and the upper axial magnetic bearing (36) are electromagnets (32a) (33a) (34
a) (35a) (38a), and the lower axial magnetic bearing (37) is equipped with a permanent magnet (37a).
ロータ(31)の上下の大径部(3LaX31b)の内
面に内向きフランジ(38)(39)がそれぞれ形成さ
れ、各フランジ(3g) (39)の内周に斜め下向き
のテーパ面(38a) (39a)が形成されている。Inward flanges (38) (39) are formed on the inner surfaces of the upper and lower large diameter portions (3LaX31b) of the rotor (31), respectively, and a diagonally downward tapered surface (38a) is formed on the inner periphery of each flange (3g) (39). (39a) is formed.
ロータ(31)の上下のフランジ(38) (39)に
対応する固定軸(30)の上下2箇所に保護用軸受(4
0)(41)が設けられている。これらの保護用軸受(
40)(41)の外輪(42)(43)には、ロータ(
31)のフランジ(3g) (39)のテーパ面(38
a) (39a)に対向する斜め上向きのテーパ面(4
2a) (43a)が形成されている。保護用軸受(4
0)(41)はその外輪(42) (43)のテーパ面
(42a) (43a)で下向きのスラスト荷重を受け
るように配置されたアンギュラ玉軸受よりなり、これら
の内輪(44) (45)が固定軸(30)の外周にそ
れぞれ固定されている。そして、ロータ(31)が正常
に回転しているときは、ロータ(31)のフランジ(3
8> (39)のテーパ面(38a)(39a、、)と
対応する保護用軸受(40)(41)のテーパ面(42
a) (43a)との間にはたとえば0.1〜数mm程
度のすきまがある。Protective bearings (4
0) (41) are provided. These protective bearings (
The outer rings (42) and (43) of 40 and 41 have rotors (
Flange (3g) of (31) Tapered surface (38) of (39)
a) Diagonally upward tapered surface (4) opposite (39a)
2a) (43a) is formed. Protective bearing (4
0) (41) consists of angular contact ball bearings arranged to receive downward thrust loads on the tapered surfaces (42a) (43a) of their outer rings (42) (43), and these inner rings (44) (45). are respectively fixed to the outer periphery of the fixed shaft (30). When the rotor (31) is rotating normally, the flange (3) of the rotor (31)
8> The tapered surfaces (42) of the protective bearings (40) (41) corresponding to the tapered surfaces (38a) (39a, , ) of (39)
a) There is a gap of, for example, about 0.1 to several mm between (43a).
第2実施例の場合も、第1実施例の場合と同様、磁気軸
受(32) (33) (34) (35) (3B)
の電磁石(32a) (33a) (34a) (35
a) (36a)に通電されなくなると、永久磁石(3
7a)と重力の作用により、ロータ(31)が下方に移
動して、そのテーパ面(38a)(39a)が保護用軸
受(40) (41)のテーパ面(42a) (43a
)に圧接する。したがって、停電その他の故障が発生し
た場合やコータ(31)に振動が発生した場合に、ロー
タ(31)の振れ回りを防止することができる。In the case of the second embodiment, as in the case of the first embodiment, magnetic bearings (32) (33) (34) (35) (3B)
Electromagnets (32a) (33a) (34a) (35
a) When (36a) is no longer energized, the permanent magnet (3
7a) and gravity, the rotor (31) moves downward, and its tapered surfaces (38a) (39a) align with the tapered surfaces (42a) (43a) of the protective bearings (40) (41).
). Therefore, when a power outage or other failure occurs or when vibration occurs in the coater (31), it is possible to prevent the rotor (31) from whirling around.
上記実施例では、停電などの非常時にロータ軸(11)
またはロータ(31)を下方に吸引する手段として永久
磁石(18a) (37a)を用いているが、これにか
えてバッテリなどを動力源とする電磁石またはばねなど
の機械的手段を用いて吸引してもよい。さらに、上記実
施例では、保護用軸受(20) (21) (40)
(41)としてアンギュラ玉軸受を使用しているが、実
際使用時には軸受すきまによりある程度の接触角がつく
深みぞ玉軸受を使用してもよい。In the above embodiment, in an emergency such as a power outage, the rotor shaft (11)
Alternatively, permanent magnets (18a) (37a) are used as a means to attract the rotor (31) downward, but instead of this, an electromagnet powered by a battery or a mechanical means such as a spring may be used to attract the rotor (31) downward. It's okay. Furthermore, in the above embodiment, the protective bearings (20) (21) (40)
Although an angular contact ball bearing is used as (41), in actual use, a deep groove ball bearing may be used in which a certain degree of contact angle is obtained depending on the bearing clearance.
磁気軸受装置の構成は、上記実施例のものに限らず、適
宜変更可能である。また、この発明は、ロータ軸やロー
タが水平または斜めに配置される磁気軸受装置にも適用
できる。The configuration of the magnetic bearing device is not limited to that of the above embodiment, and can be modified as appropriate. Further, the present invention can be applied to a magnetic bearing device in which a rotor shaft or rotor is arranged horizontally or diagonally.
発明の効果
この発明の磁気軸受装置によれば、上述のように、保護
用軸受作動時に回転部分付勢手段とテーパ面の作用によ
り回転部分を保護用軸受で確実に保持して振れ回りを防
止することができる。したがって、軸受や回転部分の寿
命が向上する。Effects of the Invention According to the magnetic bearing device of the present invention, as described above, when the protective bearing operates, the rotating portion is reliably held by the protective bearing through the action of the rotating portion biasing means and the tapered surface to prevent whirling. can do. Therefore, the life of the bearings and rotating parts is improved.
第1図はこの発明の第1実施例を示す磁気軸受装置の縦
断面図、第2図はこの発明の第2実施例を示す磁気軸受
装置の縦断面図である。
(10)・・・固定ケース、(11)・・・ロータ軸、
(12)(13) ・・・フランジ、(12a) (1
3a)”’テーパ面、(15)(1B)・・・ラジアル
磁気軸受、(17)(18)・・・アキシャル磁気軸受
、(18a)・・・永久磁石、(20)(21)・・・
保護用軸受、(22) (23)・・・内輪、(22a
) (23a)・・・テーパ面、(30)・・・固定軸
、(31)・・・ロータ、(32) (33) (34
) (35)・・・ラジアル磁気軸受、(3B)(37
)・・・アキシャル磁気軸受、(37a)・・・永久磁
石、(3B)(39)・・・フランジ、(38a) (
39a)・・・テーパ面、(40)(41)・・・保護
用軸受、(42)(43)・・・外輪、(42a) (
43a)・・・テーパ面。
以上
特許出願人 光洋精工株式会社
第1図FIG. 1 is a longitudinal sectional view of a magnetic bearing device showing a first embodiment of the invention, and FIG. 2 is a longitudinal sectional view of a magnetic bearing device showing a second embodiment of the invention. (10)...Fixed case, (11)...Rotor shaft,
(12) (13) ... flange, (12a) (1
3a)'' Tapered surface, (15) (1B)... Radial magnetic bearing, (17) (18)... Axial magnetic bearing, (18a)... Permanent magnet, (20) (21)...・
Protective bearing, (22) (23)... Inner ring, (22a
) (23a)...Tapered surface, (30)...Fixed shaft, (31)...Rotor, (32) (33) (34
) (35)...Radial magnetic bearing, (3B) (37
)...Axial magnetic bearing, (37a)...Permanent magnet, (3B) (39)...Flange, (38a) (
39a)... Tapered surface, (40) (41)... Protective bearing, (42) (43)... Outer ring, (42a) (
43a)...Tapered surface. Patent applicant: Koyo Seiko Co., Ltd. Figure 1
Claims (2)
びアキシャル磁気軸受で非接触状態に支持されて回転し
、回転部分の停止時に回転部分を受ける保護用軸受が固
定部分の複数箇所に設けられた磁気軸受装置において、 保護用軸受の回転部分側の軌道輪と回転部分に、保護用
軸受作動時に互いに接触するテーパ面が形成され、保護
用軸受がそのテーパ面によりスラスト荷重を受けるよう
に配置された玉軸受であり、回転部分をそのテーパ面が
保護用軸受のテーパ面に接近する方向に付勢する回転部
分付勢手段が設けられている磁気軸受装置。(1) The rotating part rotates while being supported in a non-contact manner by radial magnetic bearings and axial magnetic bearings relative to the fixed part, and protective bearings are provided at multiple locations on the fixed part to receive the rotating part when the rotating part stops. In a magnetic bearing device, the bearing ring on the rotating part side of the protective bearing and the rotating part are formed with tapered surfaces that come into contact with each other when the protective bearing is operated, and the protective bearing is arranged so that it receives a thrust load from the tapered surface. 1. A magnetic bearing device, which is a ball bearing, and is provided with rotating part biasing means for biasing the rotating part in a direction in which a tapered surface of the rotating part approaches a tapered surface of a protective bearing.
設けられた永久磁石である特許請求の範囲第1項に記載
の磁気軸受装置。(2) The magnetic bearing device according to claim 1, wherein the rotating portion biasing means is a permanent magnet provided in the axial magnetic bearing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62023268A JP2620855B2 (en) | 1987-02-03 | 1987-02-03 | Magnetic bearing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62023268A JP2620855B2 (en) | 1987-02-03 | 1987-02-03 | Magnetic bearing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63190930A true JPS63190930A (en) | 1988-08-08 |
JP2620855B2 JP2620855B2 (en) | 1997-06-18 |
Family
ID=12105853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62023268A Expired - Lifetime JP2620855B2 (en) | 1987-02-03 | 1987-02-03 | Magnetic bearing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2620855B2 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02114220U (en) * | 1989-03-02 | 1990-09-12 | ||
WO1997013985A1 (en) * | 1995-10-11 | 1997-04-17 | Seiko Seiki Kabushiki Kaisha | Magnetic bearing device |
CN100351538C (en) * | 2004-12-06 | 2007-11-28 | 李岭群 | Mechanical-permanent magnetic suspension composite shaft |
JP2010115101A (en) * | 2008-10-06 | 2010-05-20 | Meidensha Corp | Rotary machine |
CN102537047A (en) * | 2011-02-25 | 2012-07-04 | 上海大学 | Preloaded radial permanent magnet bearing |
CN103997154A (en) * | 2013-02-20 | 2014-08-20 | 苏尔寿泵业系统有限公司 | A machine provided with safety bearing |
EP2829756A1 (en) * | 2013-07-26 | 2015-01-28 | SKF Magnetic Mechatronics S.A.S. | Auxiliary bearing of the ball bearing type for a magnetically suspended rotor system |
CN111396459A (en) * | 2020-03-27 | 2020-07-10 | 江苏理工学院 | Manual centre gripping formula protection bearing device |
CN111503149A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Integrated electromagnetic protection bearing device |
CN111503147A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Conical surface clamping protection bearing device |
CN113266581A (en) * | 2020-02-17 | 2021-08-17 | Lg电子株式会社 | Compressor and cooler comprising same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4987935A (en) * | 1972-12-27 | 1974-08-22 | ||
JPS55132400A (en) * | 1979-03-30 | 1980-10-15 | Aerospatiale | Temporary restricting device for inertia wheel |
-
1987
- 1987-02-03 JP JP62023268A patent/JP2620855B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4987935A (en) * | 1972-12-27 | 1974-08-22 | ||
JPS55132400A (en) * | 1979-03-30 | 1980-10-15 | Aerospatiale | Temporary restricting device for inertia wheel |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02114220U (en) * | 1989-03-02 | 1990-09-12 | ||
WO1997013985A1 (en) * | 1995-10-11 | 1997-04-17 | Seiko Seiki Kabushiki Kaisha | Magnetic bearing device |
CN100351538C (en) * | 2004-12-06 | 2007-11-28 | 李岭群 | Mechanical-permanent magnetic suspension composite shaft |
JP2010115101A (en) * | 2008-10-06 | 2010-05-20 | Meidensha Corp | Rotary machine |
CN102537047A (en) * | 2011-02-25 | 2012-07-04 | 上海大学 | Preloaded radial permanent magnet bearing |
EP2770222A1 (en) * | 2013-02-20 | 2014-08-27 | Sulzer Pump Solutions AB | A machine provided with safety bearing |
CN103997154A (en) * | 2013-02-20 | 2014-08-20 | 苏尔寿泵业系统有限公司 | A machine provided with safety bearing |
EP2829756A1 (en) * | 2013-07-26 | 2015-01-28 | SKF Magnetic Mechatronics S.A.S. | Auxiliary bearing of the ball bearing type for a magnetically suspended rotor system |
US9746027B2 (en) | 2013-07-26 | 2017-08-29 | Skf Magnetic Mechatronics | Auxiliary bearing of the ball bearing type for a magnetically suspended rotor system |
CN113266581A (en) * | 2020-02-17 | 2021-08-17 | Lg电子株式会社 | Compressor and cooler comprising same |
CN111396459A (en) * | 2020-03-27 | 2020-07-10 | 江苏理工学院 | Manual centre gripping formula protection bearing device |
CN111503149A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Integrated electromagnetic protection bearing device |
CN111503147A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Conical surface clamping protection bearing device |
Also Published As
Publication number | Publication date |
---|---|
JP2620855B2 (en) | 1997-06-18 |
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