JPH031315U - - Google Patents
Info
- Publication number
- JPH031315U JPH031315U JP6271189U JP6271189U JPH031315U JP H031315 U JPH031315 U JP H031315U JP 6271189 U JP6271189 U JP 6271189U JP 6271189 U JP6271189 U JP 6271189U JP H031315 U JPH031315 U JP H031315U
- Authority
- JP
- Japan
- Prior art keywords
- support part
- sleeve
- bearing support
- groove
- herringbone
- 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.)
- Pending
Links
- 239000011553 magnetic fluid Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
第１図および第２図は本考案の第１実施例を示
し、第１図は動圧軸受構造を備えたブラシレスモ
ータ全体の縦断面図、第２図は動圧軸受構造をそ
の圧力特性とともに示す図である。第３図は本考
案の第２実施例を示すブラシレスモータ全体の縦
断面図である。第４図および第５図は従来例を示
し、第４図は動圧軸受構造を備えたブラシレスモ
ータ全体の縦断面図、第５図は動圧軸受構造をそ
の圧力特性とともに示す図である。
２３……軸受支持部、２５……回転軸、２６…
…軸受用スリーブ、２７ａ，２７ｂ……ヘリンボ
ーン溝、２８……磁性流体シール、３３……磁性
流体、３４……溝、ｇ，Ｇ……〓間。
1 and 2 show a first embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the entire brushless motor equipped with a hydrodynamic bearing structure, and FIG. 2 shows the hydrodynamic bearing structure together with its pressure characteristics. FIG. FIG. 3 is a longitudinal sectional view of the entire brushless motor showing a second embodiment of the present invention. 4 and 5 show a conventional example, FIG. 4 is a longitudinal sectional view of the entire brushless motor equipped with a dynamic pressure bearing structure, and FIG. 5 is a diagram showing the dynamic pressure bearing structure together with its pressure characteristics. 23...bearing support part, 25...rotating shaft, 26...
...Bearing sleeve, 27a, 27b...Herringbone groove, 28...Magnetic fluid seal, 33...Magnetic fluid, 34...Groove, between g, G...〓.
Claims (1)
リーブを取付け、上記軸受支持部内に液状潤滑剤
を収納するとともに、上記軸受支持部内に挿入さ
れる回転軸の上記スリーブと近接対向する外周面
に複数のヘリンボーン溝を設け、かつ、上記軸受
支持部の先端開口部に上記潤滑剤の漏れ止めをな
す磁性流体シールを取付けた動圧軸受構造におい
て、 上記磁性流体シールとこれに近い側のヘリンボ
ーン溝との間に、このヘリンボーン溝と上記スリ
ーブとの間の〓間よりも大きい〓間を設けたこと
を特徴とする動圧軸受構造。[Claims for Utility Model Registration] A bearing sleeve is attached to the inner surface of a bearing support part with an open end, and a liquid lubricant is stored in the bearing support part, and the above-mentioned sleeve for the rotating shaft inserted into the bearing support part is In a hydrodynamic bearing structure in which a plurality of herringbone grooves are provided on the outer circumferential surface that closely faces the sleeve, and a magnetic fluid seal that prevents leakage of the lubricant is attached to the tip opening of the bearing support part, the magnetic fluid seal A hydrodynamic bearing structure characterized in that a gap is provided between the herringbone groove and the herringbone groove on the side closer to the groove, which is larger than the gap between the herringbone groove and the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6271189U JPH031315U (en) | 1989-05-30 | 1989-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6271189U JPH031315U (en) | 1989-05-30 | 1989-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH031315U true JPH031315U (en) | 1991-01-09 |
Family
ID=31592109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6271189U Pending JPH031315U (en) | 1989-05-30 | 1989-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH031315U (en) |
-
1989
- 1989-05-30 JP JP6271189U patent/JPH031315U/ja active Pending
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