JP2507482B2 - Ceramic plain bearing device - Google Patents
Ceramic plain bearing deviceInfo
- Publication number
- JP2507482B2 JP2507482B2 JP62251558A JP25155887A JP2507482B2 JP 2507482 B2 JP2507482 B2 JP 2507482B2 JP 62251558 A JP62251558 A JP 62251558A JP 25155887 A JP25155887 A JP 25155887A JP 2507482 B2 JP2507482 B2 JP 2507482B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- ceramic
- elastic body
- bearing device
- plain 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.)
- Expired - Lifetime
Links
Landscapes
- Support Of The Bearing (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、セラミック材料で構成された軸受部材を有
するすべり軸受装置に係り、特に衝撃荷重や偏荷重に順
応してこれを緩和し得るように改良したすべり軸受装置
に関するものである。Description: TECHNICAL FIELD The present invention relates to a sliding bearing device having a bearing member made of a ceramic material, and in particular, it is adapted to absorb an impact load or an unbalanced load and reduce the load. The present invention relates to an improved plain bearing device.
〔従来技術〕 セラミックは硬度が高く、摩擦係数が小さいという点
では優れた軸受材料であるが、脆いという欠点が有る。
このため、セラミック軸受装置は衝撃荷重や偏荷重に対
して弱いという問題が有る。[Prior Art] Ceramics are excellent bearing materials in that they have high hardness and a small friction coefficient, but they have the drawback of being brittle.
Therefore, there is a problem that the ceramic bearing device is weak against an impact load and an unbalanced load.
こうした欠点を解消するため、特開昭60-40816に記載
のように軸受と該軸受を取付ける軸受ケースとの間に弾
性体を入れるというアイデァはあるが、弾性体を取付け
る構造上の制約から、弾性体の変形態が損なわれて高弾
性化し弾性体の役割を果たしている。In order to eliminate these drawbacks, there is an idea that an elastic body is inserted between the bearing and the bearing case in which the bearing is mounted as described in JP-A-60-40816, but due to the structural limitation of mounting the elastic body, The deformed form of the elastic body is impaired to make it highly elastic and play the role of the elastic body.
従来のセラミックすべり軸受装置においては、何らか
の原因で偏荷重が発生した場合、その荷重をセラミック
軸受の軸方向の端部の一点で受けることになるため、セ
ラミック軸受が破損することがある。In the conventional ceramic slide bearing device, if an eccentric load is generated for some reason, the load is received at one end of the ceramic bearing in the axial direction, and the ceramic bearing may be damaged.
上記の事情に鑑み、本発明の目的は、たとえ偏荷重が
発生しても、セラミック軸受を破損から保護できるよう
にしたセラミックすべり軸受装置を提供することにあ
る。In view of the above circumstances, an object of the present invention is to provide a ceramic slide bearing device capable of protecting the ceramic bearing from damage even if an unbalanced load occurs.
上記の目的を達成するため、本発明においては、セラ
ミック軸受と、該セラミック軸受を収納する軸受ケース
との間に、軸方向もしくは円周方向のいずれか一方向も
しくは両方向に複数の溝を形成した弾性部材を介装した
セラミックすべり軸受装置において、前記弾性部材の軸
方向の端部を、その開口部に向けてテーパ状に拡開した
ものである。In order to achieve the above object, in the present invention, a plurality of grooves are formed between a ceramic bearing and a bearing case that houses the ceramic bearing, in one or both of the axial direction and the circumferential direction. In a ceramic sliding bearing device having an elastic member interposed, an axial end portion of the elastic member is expanded in a tapered shape toward an opening thereof.
セラミック軸受に支持された軸に偏荷重が作用した場
合、その軸の傾きによって、セラミック軸受も弾性体を
変形させながら傾斜する。この時、弾性体の端部がテー
パ状に拡開しているため、セラミック軸受を傾斜させる
力は、まず、弾性体で支持されている部分に作用し、弾
性体を変形させながら次第にセラミック軸受の端部に拡
大される。したがって、セラミック軸受の端部に作用す
る力は、軸に作用した偏荷重が、弾性体の変形により緩
和された小さなものになり、セラミック軸受の破損を防
止することができる。When an eccentric load is applied to the shaft supported by the ceramic bearing, the ceramic bearing also tilts while deforming the elastic body due to the tilt of the shaft. At this time, since the end of the elastic body is expanded in a tapered shape, the force for inclining the ceramic bearing first acts on the portion supported by the elastic body, gradually deforming the ceramic body while deforming the elastic body. Is enlarged at the end of. Therefore, the force acting on the end portion of the ceramic bearing becomes small because the eccentric load acting on the shaft is relieved by the deformation of the elastic body, and the ceramic bearing can be prevented from being damaged.
第１図は本発明に係るセラミックすべり軸受の１実施
例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of a ceramic plain bearing according to the present invention.
回転軸１にスリーブ２が嵌着され、このスリーブ２に
対してセラミック軸受４が外嵌されている。A sleeve 2 is fitted on the rotary shaft 1, and a ceramic bearing 4 is fitted on the sleeve 2.
ただし、本図においては読図を容易ならしめるため、
軸受間隙寸法ｔを拡大して描いてある。However, in order to make reading easier in this figure,
The bearing gap dimension t is shown enlarged.
５は、セラミック軸受のバックメタルである。上記バ
ックメタル５の外側を弾性体６が支承している。７は上
記弾性体６のバックメタルである。Reference numeral 5 is a back metal of the ceramic bearing. An elastic body 6 supports the outside of the back metal 5. Reference numeral 7 is a back metal of the elastic body 6.
上記の弾性体６およびこれを固着したバックメタル７
は、軸受ケース８内に収納。固定されている。The elastic body 6 and the back metal 7 fixing the elastic body 6
Is stored in the bearing case 8. Fixed.
３は、鉛合金製の環状部材であって、輸送時や据付時
にセラミック軸受４を保護するため、ダミー軸受とし
て、軸受ケース８と回転軸１との間に介装されている。
輸送、据付を終われば、該ダミー軸受３は取り外す。An annular member 3 made of lead alloy is interposed between the bearing case 8 and the rotating shaft 1 as a dummy bearing to protect the ceramic bearing 4 during transportation and installation.
When the transportation and installation are completed, the dummy bearing 3 is removed.
第２図（Ａ）は前記弾性体６の単品の部分的平面図、
同図（Ｂ）は同じく部分的縦断面図である。FIG. 2 (A) is a partial plan view of the elastic body 6 alone,
The same figure (B) is a partial vertical sectional view.
弾性体６は略円筒状に構成され、軸心と平行に複数本
（本例においては12本）の縦溝９が設けられている。The elastic body 6 is formed in a substantially cylindrical shape, and is provided with a plurality of (12 in this example) vertical grooves 9 parallel to the axis.
第１図は上記の縦溝９を含まない面で切断して描いて
あり、第２図（Ｂ）は該縦溝９を含む面で切断して描い
てある。FIG. 1 is drawn by cutting along a surface not including the vertical groove 9 and FIG. 2B is drawn by cutting by a surface including the vertical groove 9.
第２図（Ｂ）に示すごとく、軸心方向について中央部
に中央円周溝10を設ける。この中央円周溝10の幅寸法W1
を適宜に設定することにより、弾性体６全体としての外
見的な弾性係数を調整することができる。As shown in FIG. 2 (B), a central circumferential groove 10 is provided in the central portion in the axial direction. The width dimension W 1 of this central circumferential groove 10
By appropriately setting, the apparent elastic coefficient of the elastic body 6 as a whole can be adjusted.
本発明を実施する際、この幅寸法W1は使用条件、特に
衝撃荷重の予測に基づいて設定する。この幅寸法W1をゼ
ロに設定すること（即ち、中央円周溝10を省略するこ
と）も可能である。When carrying out the present invention, this width dimension W 1 is set based on the use conditions, particularly the prediction of the impact load. It is also possible to set this width dimension W 1 to zero (ie omitting the central circumferential groove 10).
弾性体６の両端（本第２図（Ｂ）において上、下端）
付近に、端部円周溝11を設ける。これにより、軸受端付
近を支承している弾性体の弾性係数が減少し、回転軸１
の傾きに対する順応性が向上する。ただし、この順応性
が過大であっては弊害を生じるので、幅寸法W2は適宜寸
法に設定するものとし、使用条件によってはこれを省略
することを妨げない。Both ends of the elastic body 6 (upper and lower ends in FIG. 2B).
An end circumferential groove 11 is provided in the vicinity. As a result, the elastic coefficient of the elastic body supporting the vicinity of the bearing end decreases, and the rotating shaft 1
Adaptability to the inclination of is improved. However, if this adaptability is excessive, it causes a harmful effect. Therefore, the width dimension W 2 should be set to an appropriate dimension, and it may be omitted depending on the usage conditions.
上記弾性体６の内周面の両端部に、外開き方向のテー
パを付するように、軸受端部側の傾斜加工12を施す。こ
れにより、回転軸１が傾き方向に変位したとき、セラミ
ック軸受４の両端部に生じる片当たり状の偏荷重が緩和
される。Both ends of the inner peripheral surface of the elastic body 6 are subjected to inclination processing 12 on the bearing end side so as to taper in the outward opening direction. As a result, when the rotating shaft 1 is displaced in the tilt direction, the unbalanced eccentric load generated at both ends of the ceramic bearing 4 is alleviated.
本発明のセラミックすべり軸受装置を適用すると、衝
撃荷重や偏荷重を緩和してセラミック軸受部材の破損を
防止することが出来る。When the ceramic plain bearing device of the present invention is applied, it is possible to reduce impact load and unbalanced load and prevent damage to the ceramic bearing member.
例えば本発明の軸受装置を大形ポンプなどの大形大重
量の回転機器に適用した場合、使用中における異常発生
に因る衝撃荷重からセラミック軸受を防護するのみでな
く、加工精度・組立精度に起因する同軸度狂いや同心度
狂いによる偏荷重（片当たり）からセラミック軸受を保
護することが出来、更には据付精度や地盤沈下に因る偏
荷重からもセラミック軸受を保護することが出来る。For example, when the bearing device of the present invention is applied to a large-sized and heavy-duty rotating device such as a large-sized pump, it not only protects the ceramic bearing from an impact load caused by the occurrence of an abnormality during use, but also improves processing accuracy and assembly accuracy. It is possible to protect the ceramic bearing from an unbalanced load (one-sided contact) due to the concentricity deviation and the concentricity deviation, and further to protect the ceramic bearing from the installation accuracy and the unbalanced load caused by the ground subsidence.
第１図は本発明に係るセラミックすべり軸受装置の１実
施例における縦断面図である。 第２図は上記実施例における弾性体６の単品図を示し、
同図（Ａ）は部分的平面図、同図（Ｂ）は部分的縦断面
図である。 １……回転軸、２……スリーブ、４……セラミック軸
受、６……弾性体、９……縦溝、10……中央円周溝、11
……端部側円周溝。FIG. 1 is a vertical sectional view of an embodiment of a ceramic plain bearing device according to the present invention. FIG. 2 shows a single-part drawing of the elastic body 6 in the above embodiment,
The same figure (A) is a partial plan view and the same figure (B) is a partial longitudinal sectional view. 1 ... Rotary shaft, 2 ... Sleeve, 4 ... Ceramic bearing, 6 ... Elastic body, 9 ... Vertical groove, 10 ... Center circumferential groove, 11
...... End side circumferential groove.
Claims (1)
納する軸受ケースとの間に、軸方向もしくは円周方向の
いずれか一方向もしくは両方向に複数の溝を形成した弾
性部材を介装したセラミックすべり軸受装置において、
前記弾性部材の軸方向の端部を、その開口部に向けてテ
ーパ状に拡開したことを特徴とするセラミックすべり軸
受装置。1. A ceramic slide in which an elastic member having a plurality of grooves formed in one or both of an axial direction and a circumferential direction is interposed between a ceramic bearing and a bearing case housing the ceramic bearing. In the bearing device,
A ceramic plain bearing device, wherein an axial end portion of the elastic member is expanded in a tapered shape toward the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251558A JP2507482B2 (en) | 1987-10-07 | 1987-10-07 | Ceramic plain bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251558A JP2507482B2 (en) | 1987-10-07 | 1987-10-07 | Ceramic plain bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0198707A JPH0198707A (en) | 1989-04-17 |
| JP2507482B2 true JP2507482B2 (en) | 1996-06-12 |
Family
ID=17224603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62251558A Expired - Lifetime JP2507482B2 (en) | 1987-10-07 | 1987-10-07 | Ceramic plain bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507482B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6335470B2 (en) * | 2013-10-25 | 2018-05-30 | 株式会社クボタ | Sliding bearing device and pump device |
| JP6313164B2 (en) * | 2014-08-28 | 2018-04-18 | 住友重機械工業株式会社 | Stirring shaft drive device and assembly method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170623U (en) * | 1984-10-15 | 1986-05-14 | ||
| JPS62172820U (en) * | 1986-04-23 | 1987-11-02 |
-
1987
- 1987-10-07 JP JP62251558A patent/JP2507482B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0198707A (en) | 1989-04-17 |
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