CN1072332C - Hemispherical fluid bearing - Google Patents
Hemispherical fluid bearing Download PDFInfo
- Publication number
- CN1072332C CN1072332C CN95113195A CN95113195A CN1072332C CN 1072332 C CN1072332 C CN 1072332C CN 95113195 A CN95113195 A CN 95113195A CN 95113195 A CN95113195 A CN 95113195A CN 1072332 C CN1072332 C CN 1072332C
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- CN
- China
- Prior art keywords
- film coating
- fluid bearing
- inner ring
- ring
- hemispherical fluid
- 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 - Fee Related
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- Sliding-Contact Bearings (AREA)
Abstract
The present invention provides a hemispherical fluid bearing and a manufacturing method thereof. The hemispherical fluid bearing is provided with a pair of inner rings and an outer ring, wherein each inner ring has a spherical external lubricating surface, and the inner rings are oppositely fixed on a shaft; the outer ring has a lubricating surface corresponding to the lubricating surfaces of the inner rings, and is used for supporting the inner rings to rotate, and one of the inner rings and the outer ring are provided with a first film coating made from titanium or ceramics and formed on the lubricating surface. Therefore, abrasion generated by solid friction when a motor starts or stops can be effectively reduced.
Description
The present invention relates to a kind of bearing, more particularly, is a kind of hemispherical fluid bearing.
Usually, FDB is used to support the object of high speed rotating.Traditional contact bearing such as ball bearing or roller bearing can produce violent vibration and noise under situation about running up, and rotation is unstable.In contrast, FDB is with non-contacting form high speed rotating, fewer vibrations and spin stabilization.Therefore, FDB can be applied in the spindle drive motor of necessary atwirl hard disk drive, or uses in the multilist face mirror drive motor of the rotation in laser printer or laser scanner.
Fig. 1 is the sectional view of traditional hemisphere bearing, and it is a FDB.As shown, traditional hemispherical fluid bearing comprises a upper inner ring 20 and a lower inner ring 30, and they respectively have an exterior semi-spherical surface, and they are fixed on the axle 10 of a motor mutually Face to face; One is fixed on an outer shroud 50 in the bearing housing 40; A ring 60 is used to keep upper inner ring 20 and lower inner ring 30 not to break away from from axle 10; A pad 70, it is arranged between upper inner ring 20 and the lower inner ring 30, is used to remain between outer shroud 50 and the upper inner ring 20 and gap between outer shroud 50 and the lower inner ring 30.
Yet traditional hemispherical fluid bearing demonstrates an obvious defects, promptly can make the contact surface wearing and tearing of outer shroud 50 and interior ring 20 and 30 when motor starting with when stopping.In other words, between outer shroud 50 and upper inner ring 20, and between outer shroud 50 and the lower inner ring 30 critical velocity or under produce solid friction, quickened wearing and tearing like this, the result reduces the lifetime of hemispherical fluid bearing.
The purpose of this invention is to provide a kind of hemispherical fluid bearing that can reduce the wearing and tearing that cause by solid friction effectively.
In order to achieve the above object, the invention provides a kind of hemispherical fluid bearing, comprise ring in a pair, ring has the outer lubricated surface of a sphere in each, they are fixed on one with facing one another, also comprise an outer shroud, it has a lubricated surface corresponding to the lubricated surface of ring in described, be used to support the rotation of described interior ring, it is characterized by, ring and described outer shroud had the first film coating of a titanium that forms at least one was described on its lubricated surface, and formed second film coating of a diamond-like-carbon on described the first film coating.Form a predetermined groove on second film coating, it extends to the first film coating.The first film coating is 5-20 μ m, and second film coating is 5-10 μ m.
Above-mentioned purpose of the present invention and advantage will be more obvious to the description of the details of preferred embodiment in conjunction with the drawings, wherein:
Fig. 1 is the sectional view of traditional hemispherical fluid bearing;
Fig. 2 is the sectional view according to hemispherical fluid bearing of the present invention;
Fig. 3 is the sectional view along the A-A line of Fig. 2.
Referring to Fig. 2 and 3, hemispherical fluid bearing according to the present invention comprises a upper inner ring 20 and a lower inner ring 30, ring respectively has a semispherical surface in each, they face one another face ground and are fixed on the axle 10 of motor, also have one and be fixed on an outer shroud 50 in the bearing housing 40, be used to support upper inner ring 20 and lower inner ring 30, so that they can rotate, a ring 60 that is used to keep upper inner ring 20 and lower inner ring 30 not to break away from from axle 10, a pad 70, it is arranged between upper inner ring 20 and the lower inner ring 30, is used to keep between outer shroud 50 and the upper inner ring 20, and the gap between outer shroud 50 and the lower inner ring 30.At this, ring 60 can be installed or and axle 60 screw thread combinations forcefully.
Upper inner ring 20 and lower inner ring 30 mainly formed by high carbon steel or WCo and has thick titanium (Ti) film 21 of 5-20 μ m.Similarly, the lubricated surface of outer shroud 50 is mainly formed by high carbon steel or WCo and the thick titanium film coating 51 of 5-20 μ m is arranged. Film coating 21 and 51 can be replaced by the ceramic membrane coating, for example, and Al
2O
3Film coating.In addition, upper inner ring 20, lower inner ring 30 and outer shroud 50 can be formed by pottery entirely.
Film coating is used to alleviate between outer shroud 50 and the upper inner ring 20, and the wearing and tearing between outer shroud 50 and the lower inner ring 30, and therebetween solid friction produces in critical velocity or when being lower than this speed by motor starting or when stopping in these wearing and tearing.
On the other hand, in order further to reduce the wearing and tearing that cause by solid friction, on the titanium film 21 of upper inner ring 20 and lower inner ring 30, scribble diamond-like-carbon (DLC) coating of 5-10 μ m.Because DLC film coating 22 has the coefficient of linear expansion similar to titanium film coating 21, so do not worry peeling off or the gap changes.In addition, the former has so more effectively reduced the influence of solid friction than latter's rub resistance more.
Be formed with a groove 23 on DLC film coating 22, groove 23 can arrive titanium film coating 21 by DLC film coating 22 according to the thickness of DLC film coating 22.Groove 23 is by produce oil pressure or air pressure lifting upper inner ring 20 and lower inner ring 30 when inside and outside ring rotates, away from outer shroud 50.
In addition, DLC film coating 22 and groove 23 are provided for outer shroud 50.
The embodiment of a method that is used to make above-mentioned hemispherical fluid bearing will be described in detail belows.Mainly to not sphericity 0.15-0.25 μ m is arranged, and their spherical surface scribbles the thick titanium film of 5-20 μ m by mechanical lapping for upper inner ring 20 that is formed by high carbon steel or WCo and lower inner ring 30.Then, the thick DLC film of 5-10 μ m is coated on the titanium film.
A kind of titanium ion bundle injection method or titanium gas deposition method can be used for the coated titanium film.The titanium film can be replaced with same method by ceramic membrane.
The lubricated surface of outer shroud 50 scribbles 5-20 μ m thick titanium film or ceramic membrane.
After this, by chemical corrosion method or discharge mechanical means groove 23 is formed on the DLC film 22.
As mentioned above, can stop effectively according to hemispherical fluid bearing of the present invention by the wearing and tearing that solid friction produced between interior ring and the outer shroud.Therefore, its life-span is rise-to stop for 500,000 times approximately, and traditional bearing has 100, and 000-200 rise-stops for 000 time.
Claims (6)
1. a hemispherical fluid bearing comprises ring in a pair, and ring has the outer lubricated surface of a sphere in each, they are fixed on one with facing one another, also comprise an outer shroud, and it has a lubricated surface corresponding to the lubricated surface of ring in described, be used to support the rotation of described interior ring
It is characterized by, ring and described outer shroud had the first film coating of a titanium that forms at least one was described on its lubricated surface, and formed second film coating of a diamond-like-carbon on described the first film coating.
2. hemispherical fluid bearing as claimed in claim 1 is characterized by, and forms a predetermined groove on described second film coating.
3. hemispherical fluid bearing as claimed in claim 2 is characterized by, and described groove extends to described the first film coating.
4. hemispherical fluid bearing as claimed in claim 1 is characterized by, and described the first film coating is that 5-20 μ m is thick.
5. hemispherical fluid bearing as claimed in claim 1 is characterized by, and described second film coating is 5-10 μ m.
6. hemispherical fluid bearing as claimed in claim 2 is characterized by, and described second film coating is 5-10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113195A CN1072332C (en) | 1995-12-28 | 1995-12-28 | Hemispherical fluid bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113195A CN1072332C (en) | 1995-12-28 | 1995-12-28 | Hemispherical fluid bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1183516A CN1183516A (en) | 1998-06-03 |
| CN1072332C true CN1072332C (en) | 2001-10-03 |
Family
ID=5079889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95113195A Expired - Fee Related CN1072332C (en) | 1995-12-28 | 1995-12-28 | Hemispherical fluid bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072332C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100189929B1 (en) * | 1996-07-27 | 1999-06-01 | 윤종용 | Fluidic bearing with a spacer |
| JP4745604B2 (en) * | 2003-08-07 | 2011-08-10 | ブラザー工業株式会社 | Sliding part manufacturing method and sliding part |
| CN103595205A (en) * | 2013-10-28 | 2014-02-19 | 中国船舶重工集团公司第七0七研究所 | Dual-motor dragging integral hemisphere bearing gyro machine |
| CN104405769B (en) * | 2014-11-05 | 2017-08-25 | 北京航天计量测试技术研究所 | A kind of double hemisphere Porous static air pressure shaftings with grading ring groove |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296248A (en) * | 1976-02-10 | 1977-08-12 | Murata Machinery Ltd | Yarn cutting apparatus |
| DE3733117A1 (en) * | 1986-09-30 | 1988-04-07 | Toshiba Kawasaki Kk | DYNAMIC PRESSURE AIR BEARING |
| EP0376647A2 (en) * | 1988-12-26 | 1990-07-04 | Wing Highcera Co., Ltd. | Ceramic bearing and the manufacturing method |
-
1995
- 1995-12-28 CN CN95113195A patent/CN1072332C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296248A (en) * | 1976-02-10 | 1977-08-12 | Murata Machinery Ltd | Yarn cutting apparatus |
| DE3733117A1 (en) * | 1986-09-30 | 1988-04-07 | Toshiba Kawasaki Kk | DYNAMIC PRESSURE AIR BEARING |
| EP0376647A2 (en) * | 1988-12-26 | 1990-07-04 | Wing Highcera Co., Ltd. | Ceramic bearing and the manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1183516A (en) | 1998-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20011003 Termination date: 20101228 |