JPS63289317A - Radial ball bearing for protection in magnetic bearing device - Google Patents
Radial ball bearing for protection in magnetic bearing deviceInfo
- Publication number
- JPS63289317A JPS63289317A JP12321487A JP12321487A JPS63289317A JP S63289317 A JPS63289317 A JP S63289317A JP 12321487 A JP12321487 A JP 12321487A JP 12321487 A JP12321487 A JP 12321487A JP S63289317 A JPS63289317 A JP S63289317A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- outer ring
- ring
- radial ball
- ball bearing
- 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
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 24
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000007790 scraping 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
- F16C2300/62—Application independent of particular apparatuses related to environment, i.e. operating conditions low pressure, e.g. elements operating under vacuum conditions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Rolling Contact 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、たとえば真空ポンプなどの磁気軸受装置に
おける保護用ラジアル玉軸受に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a protective radial ball bearing in a magnetic bearing device, such as a vacuum pump.
従来の技術とその問題点
第３図は従来の磁気軸受装置の１例を示し、垂直固定軸
（１）の周囲に円筒状のロータ（２）が配置されている
。ロータ（２）は、固定軸（１）に設けられたラジアル
磁気軸受（３） （４）およびアキシャル磁気軸受（５
）（６）で非接触状態に支持され、たとえば３００００
ｒｐＬｌｌ程度の高速で回転する。Prior art and its problems FIG. 3 shows an example of a conventional magnetic bearing device, in which a cylindrical rotor (2) is arranged around a vertical fixed shaft (1). The rotor (2) has radial magnetic bearings (3) (4) and axial magnetic bearings (5) provided on the fixed shaft (1).
) (6) in a non-contact state, for example, 30,000
It rotates at a high speed of about rpLll.
固定軸（１）の上下２箇所に、ロータ（２）の停止時に
これを受けるための保護用ラジアル玉軸受（７）（８）
が設けられている。各保護用軸受（７）（８）には負荷
能力を増すため総圧軸受が使用され、その内輪（７ａ）
（８ａ）が固定軸（１）に固定されている。ロータ（
２）が正常に回転しているときは、ロータ（２）と保護
用軸受（７）（８）との間にはたとえば０．１〜数ｌｌ
１ｍ程度のすきまがある。そして、ロータ（２）が停止
するときには、ロータ（２）が保護用軸受（７） （８
）の外輪（７ｂ） （８ｂ）に接触してこれに受けられ
、ロータ（２）が磁気軸受（３） （４） （５）（６
）などに接触してこれらを損傷しないようになっている
。なお、このようにロータが保護用軸受に受けられて停
止する動作をタッチダウンという。Protective radial ball bearings (7) and (8) are installed at two locations above and below the fixed shaft (1) to receive the rotor (2) when it is stopped.
is provided. A total pressure bearing is used for each protective bearing (7) (8) to increase the load capacity, and its inner ring (7a)
(8a) is fixed to the fixed shaft (1). Rotor (
2) is rotating normally, there is a gap of, for example, 0.1 to several liters between the rotor (2) and the protective bearings (7) and (8).
There is a gap of about 1m. Then, when the rotor (2) stops, the rotor (2) is moved by the protective bearing (7) (8
) is in contact with and received by the outer rings (7b) (8b) of the rotor (2).
) etc. to prevent damage to them by contacting them. Note that this operation in which the rotor is stopped by being received by the protective bearing is called touchdown.
ところで、磁気軸受装置が正常な状態で停止する場合、
ロータ（２）は徐々に減速され、かなり低速になってか
ら保護用軸受（７） （８）に接触して低速でタッチダ
ウンするため、保護用軸受（７）（８）が損傷すること
はない。これに対し、停電その他の故障により磁気軸受
（３） （４） （５） （６）が作動しなくなった場
合は、高速で回転しているロータ（２）が保護用軸受（
７） （８）に接触して高速でタッチダウンするため、
とくに真空ポンプの磁気軸受装置の場合、保護用軸受（
７） （８）が真空中（たとえば１０ −１０−３Ｔｏ
ｒｒ）において急激な立上りで高速回転（たとえばｄｍ
ｎ＞３００ＸＩＯ’）することになる。このため、従来
の保護用軸受（７） （８）では、耐久性が劣っており
、１回の高速タッチダウンの途中で保護用軸受（７）（
８）が損傷するというような問題があった。By the way, if the magnetic bearing device stops under normal conditions,
Since the rotor (2) is gradually decelerated and reaches a fairly low speed, it contacts the protective bearings (7) (8) and touches down at a low speed, so the protective bearings (7) and (8) will not be damaged. do not have. On the other hand, if the magnetic bearings (3) (4) (5) (6) stop working due to a power outage or other failure, the rotor (2) rotating at high speed will
7) To touch down at high speed by contacting (8),
In particular, in the case of magnetic bearing devices for vacuum pumps, protective bearings (
7) (8) is in vacuum (e.g. 10-10-3To
rr) with a rapid rise and high speed rotation (for example, dm
n>300XIO'). For this reason, conventional protective bearings (7) and (8) have poor durability, and the protective bearings (7) and
8) was damaged.
磁気軸受装置には、上記のように固定軸の周囲を筒状の
ロータが回転する形式の他に、筒状の固定ケースの内側
をロータ軸か回転する形式もある。この場合、ケースの
上下２箇所に保護用軸受が設けられ、軸が停止するとき
に、軸が保護用軸受の内輪に接触してこれに受けられる
が、上記と同様の問題がある。In addition to the type of magnetic bearing device in which a cylindrical rotor rotates around a fixed shaft as described above, there is also a type in which a rotor shaft rotates inside a cylindrical fixed case. In this case, protective bearings are provided at two locations on the upper and lower sides of the case, and when the shaft stops, the shaft contacts and is received by the inner ring of the protective bearing, but there is a problem similar to that described above.
この発明の目的は、上記のような問題を解決した耐久性
の高い保護用ラジアル玉軸受を提供することにある。An object of the present invention is to provide a highly durable protective radial ball bearing that solves the above problems.
問題点を解決するための手段
この発明による保護用ラジアル玉軸受は、固定部分に対
し回転部分を磁気軸受で非接触状態に支持して回転させ
る磁気軸受装置において、回転部分の停止時に回転部分
を受けるために固定部分の複数箇所に設けられる保護用
ラジアル玉軸受であって、
玉または軌道と、回転部分と接触する軌道輪の面とに、
固体潤滑剤がコーティングされていることを特徴とする
ものである。Means for Solving the Problems The protective radial ball bearing according to the present invention is a magnetic bearing device in which a rotating part is supported and rotated by a magnetic bearing in a non-contact state with respect to a fixed part, and when the rotating part is stopped, the rotating part is A protective radial ball bearing that is provided at multiple locations on a fixed part to receive the bearing, the balls or raceway and the surface of the raceway that comes into contact with the rotating part,
It is characterized by being coated with a solid lubricant.
作 用
高速タッチダウン時に回転部分が高速回転状態のまま保
護用ラジアル玉軸受の軌道輪に接触すると、この軌道輪
も高速で回転を開始するが、保護用ラシアル玉軸受の玉
または軌道と、回転部分と接触する軌道輪の面とに、固
体潤滑剤がコーティングされているから、耐久性が高く
、損傷を受けにくい。すなわち、まず、軌道輪の表面に
コーティングされた固体潤滑剤が磁気軸受装置の回転部
分と軌道輪の間のすべりを助長するため、高速タッチダ
ウン時の軌道輪の立上りは緩やかになり、軌道輪の最高
回転数も小さくなる。そして、このように軌道輪の最高
回転数が小さくなるため、軌道輪および玉の遠心力が小
さくなる。さらに、玉または軌道の固体潤滑剤は、これ
らの間の潤滑剤となる。したがって、保護用ラジアル玉
軸受の耐久性か向上し、損傷の度合が小さくなる。Operation During high-speed touchdown, if the rotating part contacts the raceway of the protective radial ball bearing while still rotating at high speed, this raceway will also start rotating at high speed, but the rotation will not be the same as the balls or raceways of the protective radial ball bearing. The surface of the raceway that comes into contact with the bearing is coated with a solid lubricant, making it highly durable and resistant to damage. First, the solid lubricant coated on the surface of the bearing ring promotes slippage between the rotating part of the magnetic bearing device and the bearing ring, so the rise of the bearing ring during high-speed touchdown is gradual, and the bearing ring The maximum rotational speed of the engine also decreases. Since the maximum rotational speed of the bearing ring is thus reduced, the centrifugal force of the bearing ring and balls is reduced. Additionally, the solid lubricant on the balls or tracks provides a lubricant between them. Therefore, the durability of the protective radial ball bearing is improved and the degree of damage is reduced.
実 施 例
第１図は、磁気軸受装置の保護用ラジアル玉軸受の１具
体例を示す。Embodiment FIG. 1 shows a specific example of a protective radial ball bearing for a magnetic bearing device.
この軸受（１０）は総圧軸受であり、内輪（１２）およ
び外輪（１３）の全表面に固体潤滑剤たとえば二硫化モ
リブデン層（１６）がコーティングにより形成されてい
る。This bearing (10) is a total pressure bearing, and a solid lubricant such as a molybdenum disulfide layer (16) is formed on the entire surface of the inner ring (12) and outer ring (13) by coating.
この軸受（１０）を第３図のような固定軸の周囲を筒状
のロータが回転する形式の磁気軸受装置に使用する場合
、内輪（１２）が固定軸に固定される。When this bearing (10) is used in a magnetic bearing device of the type in which a cylindrical rotor rotates around a fixed shaft as shown in FIG. 3, the inner ring (12) is fixed to the fixed shaft.
ロータが正常に回転している場合、ロータは磁気軸受に
より非接触状態に支持され、ロータと軸受（１０）の外
輪（１３）との間には適当なすきまがあり、外輪（１３
）は停止している。When the rotor is rotating normally, the rotor is supported by the magnetic bearing in a non-contact state, and there is an appropriate clearance between the rotor and the outer ring (13) of the bearing (10).
) has stopped.
高速タッチダウンの場合、高速で回転しているロータが
軸受（１０）の外輪（１３）に接触し、外輪（１３）も
高速で回転を開始する。このため、従来の軸受では、外
輪は第２図に破線（Ａ）で示すように非常に急激な立上
りで高速回転を開始し、外輪の最高回転数（ａ）はロー
タの回転数（Ｃ）に近くなる。このため、前述のように
、軸受が損傷する。なお、第２図において、鎖線（Ｃ）
はロータの回転数の変化を示す。In the case of high-speed touchdown, the rotor rotating at high speed contacts the outer ring (13) of the bearing (10), and the outer ring (13) also starts rotating at high speed. For this reason, in conventional bearings, the outer ring starts rotating at high speed with a very sudden rise as shown by the broken line (A) in Figure 2, and the maximum rotation speed (a) of the outer ring is equal to the rotation speed of the rotor (C). becomes close to. As a result, the bearing is damaged as described above. In addition, in Fig. 2, the chain line (C)
indicates the change in the rotation speed of the rotor.
ところが、上記の軸受（１０）の場合、内輪（１２）と
外輪（１３）の全表面に二硫化モリブデン層（１６）が
コーティングにより形成されているので、次に説明する
ように、耐久性が高く、このような損傷を防止すること
ができる。However, in the case of the above-mentioned bearing (10), the molybdenum disulfide layer (16) is formed on the entire surface of the inner ring (12) and outer ring (13) by coating, so the durability is reduced as explained below. It is highly possible to prevent such damage.
すなわち、まず、外輪（１３）の外面にコーティングさ
れた二硫化モリブデン層（１６）がロータと外輪（１３
）の間のすべりを助長するため、第２図に実線（Ｂ）で
示すように高速タッチダウン時の外輪（１３）の立上り
は緩やかになり、外輪（１３）の最高回転数（ｂ）も小
さくなる。そして、このように外輪（１３）の最高回転
数が小さくなるため、外輪（１３）および玉（１１）の
遠心力が小さくなる。That is, first, a molybdenum disulfide layer (16) coated on the outer surface of the outer ring (13) is attached to the rotor and the outer ring (13).
), the rise of the outer ring (13) during high-speed touchdown becomes gradual, as shown by the solid line (B) in Figure 2, and the maximum rotational speed (b) of the outer ring (13) also increases. becomes smaller. Since the maximum rotational speed of the outer ring (13) is thus reduced, the centrifugal force of the outer ring (13) and balls (11) is reduced.
内輪（１２）および外輪（１３）の軌道みぞ（１４）（
１５）の二硫化モリブデン層（１Ｂ）は玉（１１）との
間の潤滑剤となる。したがって、軸受（１ｏ）の損傷の
度合が小さくなる。また、修理などのために内輪（１２
）を固定軸から抜取るような場合、内輪（１２）の内周
面にも二硫化モリブデン層（１６）が形成されていて、
固定軸との間の摩擦力が小さくなっているので、抜取り
が容易である。Raceway grooves (14) of inner ring (12) and outer ring (13) (
The molybdenum disulfide layer (1B) of 15) acts as a lubricant between the ball (11) and the ball (11). Therefore, the degree of damage to the bearing (1o) is reduced. In addition, the inner ring (12
) is removed from the fixed shaft, a molybdenum disulfide layer (16) is also formed on the inner peripheral surface of the inner ring (12).
Since the frictional force between it and the fixed shaft is small, it is easy to remove.
上記の軸受（１０）は、たとえば第４図に示すように筒
状の固定ケース（１７）の内側をロータ軸（１８）が回
転する形式の磁気軸受装置にも使用できる。この場合、
外輪（１３）が固定ケース（１７）に固定され、ロータ
軸（１８）は内輪（１２）の内周面の二硫化モリブデン
層（１６）に接触する。そして、この場合も、上記とほ
ぼ同様の効果が奏される。The above-described bearing (10) can also be used in a magnetic bearing device in which the rotor shaft (18) rotates inside a cylindrical fixed case (17), as shown in FIG. 4, for example. in this case,
The outer ring (13) is fixed to a stationary case (17), and the rotor shaft (18) contacts the molybdenum disulfide layer (16) on the inner peripheral surface of the inner ring (12). In this case as well, substantially the same effects as above are achieved.
また、第５図に示すように、内輪（１２）内周面および
その表面の二硫化モリブデン層（１６）にテーバ状部分
を設け、これに対応するようにロータ軸（１８）にもテ
ーパ状部分を設けることにより、タッチダウン時に、高
速回転しているロータ軸（１８）のみそすり運動による
軸受の焼付きが防止できる。Further, as shown in FIG. 5, a tapered portion is provided on the inner circumferential surface of the inner ring (12) and the molybdenum disulfide layer (16) on the surface thereof, and the rotor shaft (18) is also tapered to correspond to this. By providing this portion, seizing of the bearing due to the scraping motion of the rotor shaft (18) rotating at high speed during touchdown can be prevented.
上記実施例には総圧軸受を示したが、この発明は保持器
付玉軸受にも適用できる。また、上記実施例では、内輪
（１２）および外輪（１３）の全表面に潤滑剤をコーテ
ィングしているが、軌道みぞ（１４） （１５）および
タッチダウン時に回転体と接触する面たけにしてもよい
。そして、潤滑剤を軌道みぞ（１４）（１５）にコーテ
ィングするかわりに玉（１１）の表面にコーティングし
てもよい。Although a total pressure bearing is shown in the above embodiment, the present invention can also be applied to a ball bearing with a cage. In addition, in the above embodiment, the entire surface of the inner ring (12) and outer ring (13) is coated with lubricant, but the lubricant is coated on the raceway grooves (14) (15) and on the surfaces that come into contact with the rotating body during touchdown. Good too. And instead of coating the raceway grooves (14) and (15) with the lubricant, the surface of the ball (11) may be coated.
発明の効果
この発明の磁気軸受装置における保護用ラジアル玉軸受
によれば、玉または軌道と、回転部分と接触する軌道輪
の面とに、固体潤滑剤がコーティングされているから、
上述のように、耐久性が高く、高速タッチダウン時の損
傷を防止することができる。Effects of the Invention According to the protective radial ball bearing in the magnetic bearing device of the present invention, the balls or the raceway and the surface of the raceway ring that comes into contact with the rotating part are coated with a solid lubricant.
As mentioned above, it has high durability and can prevent damage during high-speed touchdown.
第１図はこの発明の１実施例を示す保護用ラジアル玉軸
受の主要部縦断面図、第２図は高速タッチダウン時の外
輪の回転速度の変化を示すグラフ、第３図は従来の保護
用ラジアル玉軸受を組込んだ磁気軸受装置を示す縦断面
図、第４図はこの発明の他の実施例を示す磁気軸受装置
の保護用ラジアル玉軸受の部分の縦断面図、第５図はこ
の発明のさらに他の実施例を示す第４図相当の図面であ
る。
（１０）・・・保護用ラジアル玉軸受、（１１）・・・
玉、（１２）・・・内輪、（１３）・・・外輪、（１４
） （１５） ・・・軌道みぞ。Fig. 1 is a longitudinal sectional view of the main parts of a protective radial ball bearing showing one embodiment of the present invention, Fig. 2 is a graph showing changes in the rotational speed of the outer ring during high-speed touchdown, and Fig. 3 is a conventional protection radial ball bearing. FIG. 4 is a vertical cross-sectional view of a protective radial ball bearing portion of a magnetic bearing device showing another embodiment of the present invention, and FIG. 4 is a drawing corresponding to FIG. 4 showing still another embodiment of the present invention. (10)... Radial ball bearing for protection, (11)...
Ball, (12)... Inner ring, (13)... Outer ring, (14
) (15) ...orbital groove.
Claims (1)
して回転させる磁気軸受装置において、回転部分の停止
時に回転部分を受けるために固定部分の複数箇所に設け
られる保護用ラジアル玉軸受であって、 玉または軌道と、回転部分と接触する軌道輪の面とに、
固体潤滑剤がコーティングされていることを特徴とする
磁気軸受装置における保護用ラジアル玉軸受。[Scope of Claims] In a magnetic bearing device that supports and rotates a rotating part in a non-contact state with a magnetic bearing with respect to a fixed part, protection is provided at multiple locations on the fixed part to receive the rotating part when the rotating part stops. A radial ball bearing for use in which the balls or raceway and the surface of the raceway that comes into contact with the rotating part,
A protective radial ball bearing in a magnetic bearing device characterized by being coated with a solid lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123214A JP2652377B2 (en) | 1987-05-20 | 1987-05-20 | Protective ball bearings in magnetic bearing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123214A JP2652377B2 (en) | 1987-05-20 | 1987-05-20 | Protective ball bearings in magnetic bearing devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63289317A true JPS63289317A (en) | 1988-11-25 |
| JP2652377B2 JP2652377B2 (en) | 1997-09-10 |
Family
ID=14855024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62123214A Expired - Lifetime JP2652377B2 (en) | 1987-05-20 | 1987-05-20 | Protective ball bearings in magnetic bearing devices |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652377B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272403A (en) * | 1991-02-15 | 1993-12-21 | The Glacier Metal Company Limited | Low friction backup system for magnetic bearings |
| WO2006059651A1 (en) * | 2004-12-01 | 2006-06-08 | Jtekt Corporation | Touchdown bearing |
| JP2006183867A (en) * | 2004-12-01 | 2006-07-13 | Jtekt Corp | Touchdown bearing |
| US7806596B2 (en) * | 2007-08-31 | 2010-10-05 | Hamilton Sundstrand Corporation | High speed bearing system with bind-free axial displacement |
| EP2770223A1 (en) * | 2013-02-20 | 2014-08-27 | Sulzer Pump Solutions AB | A machine provided with safety bearing |
| CN112392859A (en) * | 2020-11-24 | 2021-02-23 | 中国电子科技集团公司第十四研究所 | Bearing raceway antifriction method based on low-temperature low-pressure high-load working condition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6183243U (en) * | 1984-11-08 | 1986-06-02 | ||
| JPS61165021A (en) * | 1985-01-11 | 1986-07-25 | Koyo Seiko Co Ltd | Roller bearing |
| JPS63270917A (en) * | 1987-04-27 | 1988-11-08 | Nippon Seiko Kk | Bearing device |
-
1987
- 1987-05-20 JP JP62123214A patent/JP2652377B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6183243U (en) * | 1984-11-08 | 1986-06-02 | ||
| JPS61165021A (en) * | 1985-01-11 | 1986-07-25 | Koyo Seiko Co Ltd | Roller bearing |
| JPS63270917A (en) * | 1987-04-27 | 1988-11-08 | Nippon Seiko Kk | Bearing device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272403A (en) * | 1991-02-15 | 1993-12-21 | The Glacier Metal Company Limited | Low friction backup system for magnetic bearings |
| WO2006059651A1 (en) * | 2004-12-01 | 2006-06-08 | Jtekt Corporation | Touchdown bearing |
| JP2006183867A (en) * | 2004-12-01 | 2006-07-13 | Jtekt Corp | Touchdown bearing |
| EP1818553A1 (en) * | 2004-12-01 | 2007-08-15 | JTEKT Corporation | Touchdown bearing |
| EP1818553A4 (en) * | 2004-12-01 | 2008-08-27 | Jtekt Corp | Touchdown bearing |
| US7786637B2 (en) | 2004-12-01 | 2010-08-31 | Jtekt Corporation | Touchdown bearing |
| JP4539861B2 (en) * | 2004-12-01 | 2010-09-08 | 株式会社ジェイテクト | Touchdown bearing |
| US7806596B2 (en) * | 2007-08-31 | 2010-10-05 | Hamilton Sundstrand Corporation | High speed bearing system with bind-free axial displacement |
| EP2770223A1 (en) * | 2013-02-20 | 2014-08-27 | Sulzer Pump Solutions AB | A machine provided with safety bearing |
| CN112392859A (en) * | 2020-11-24 | 2021-02-23 | 中国电子科技集团公司第十四研究所 | Bearing raceway antifriction method based on low-temperature low-pressure high-load working condition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2652377B2 (en) | 1997-09-10 |
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