JPH0720422U - Bearing device - Google Patents
Bearing deviceInfo
- Publication number
- JPH0720422U JPH0720422U JP5555093U JP5555093U JPH0720422U JP H0720422 U JPH0720422 U JP H0720422U JP 5555093 U JP5555093 U JP 5555093U JP 5555093 U JP5555093 U JP 5555093U JP H0720422 U JPH0720422 U JP H0720422U
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- metal
- ceramic
- metal retainer
- retainer
- 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.)
- Withdrawn
Links
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
(57)【要約】
【目的】 本考案の目的は、回転軸８がセラミック軸受
３に片当りすることなく、軸受圧力が低く抑えられ、摺
動部での発熱が少なく、良好な軸受作用を維持し得るセ
ラミック材を使用した軸受装置を提供するにある。
【構成】 本考案の軸受装置は、ケーシング１に固定さ
れた軸受ケース２と、該軸受ケース内に配設され回転軸
８を支承するセラミック軸受３と、該セラミック軸受と
焼ばめによって一体に形成され外周は軸方向に曲率をも
った曲面となっている金属リテーナ４と、該金属リテー
ナの外側に嵌入され内周面が金属リテーナ外周の曲面と
接する金属ホルダ５と、金属ホルダ５と軸受ケース２の
間に介在させた弾性体６と、前記金属リテーナの下部を
軸受ケース２側から支持する支持板７とを有してなるこ
とを特徴としている。
(57) [Abstract] [Purpose] The object of the present invention is to prevent the rotating shaft 8 from hitting the ceramic bearing 3 one-sidedly, keep the bearing pressure low, generate less heat in the sliding portion, and achieve a good bearing action. (EN) A bearing device using a sustainable ceramic material. The bearing device of the present invention comprises a bearing case 2 fixed to a casing 1, a ceramic bearing 3 arranged in the bearing case for supporting a rotating shaft 8, and a ceramic bearing 3 and the ceramic bearing 3 by shrink fit. A metal retainer 4 that is formed and has a curved surface with an axial curvature, a metal holder 5 that is fitted to the outside of the metal retainer and has an inner peripheral surface that contacts the curved surface of the metal retainer outer periphery, the metal holder 5, and a bearing It is characterized by having an elastic body 6 interposed between the cases 2 and a support plate 7 for supporting the lower part of the metal retainer from the bearing case 2 side.
Description
【０００１】[0001]
本考案は河川水や海水のポンプ等の回転軸に適用される軸受装置に関する。 The present invention relates to a bearing device applied to a rotating shaft such as a pump for river water or seawater.
【０００２】[0002]
図４に軸受面に水を導くように構成された従来の技術による軸受装置の縦断面 図を示し、図５に図４におけるＶ−Ｖ矢視の横断面図を示した。図を参照して従 来例の構成と作用について説明する。 図４，５において、０１はケーシング、０２はケーシング０１に取付けられた 軸受ケース、０３は該軸受ケースの内周に焼きばめにより固定された円筒状のセ ラミック軸受であり、該セラミック軸受にはジャーナル部に隙間ｈを有して回転 軸０４が挿入されている。なお、図示されていないが前記回転軸の下部には羽根 車が装着されており、回転軸０４の回転により羽根車が回転して、水Ｗの吸入と 吐出がなされる。 FIG. 4 shows a vertical cross-sectional view of a conventional bearing device configured to guide water to the bearing surface, and FIG. 5 shows a cross-sectional view taken along the line VV in FIG. The configuration and operation of the conventional example will be described with reference to the drawings. In FIGS. 4 and 5, 01 is a casing, 02 is a bearing case attached to the casing 01, and 03 is a cylindrical ceramic bearing fixed to the inner circumference of the bearing case by shrink fitting. The rotary shaft 04 is inserted with a gap h in the journal part. Although not shown, an impeller is attached to the lower part of the rotary shaft, and the impeller is rotated by the rotation of the rotary shaft 04 to suck and discharge the water W.
【０００３】[0003]
しかしながら、前記従来例では次のような問題点があった。 即ち、回転軸０４が軸方向にたわんでセラミック軸受０３の端部に片当りした り、また軸受ケース０２とケーシング０１との取付誤差により、軸受ケース０２ が回転軸０４の軸方向に傾斜し、セラミック軸受０３の端部と回転軸０４が片当 りすることがある。 このような片当りを生じた場合、軸受材のセラミックはヤング率が高く弾性変 形しにくい性質を有するため、接触部における単位面積当りの荷重である面圧が 増大し、軸受摺動面の温度は異常に上昇して、セラミック軸受０３と軸受ケース ０２の焼きばめ温度以上に達することもある。 However, the conventional example has the following problems. That is, the rotating shaft 04 flexes in the axial direction and comes into partial contact with the end of the ceramic bearing 03, and due to a mounting error between the bearing case 02 and the casing 01, the bearing case 02 tilts in the axial direction of the rotating shaft 04, The end of the ceramic bearing 03 and the rotating shaft 04 may hit one another. When such partial contact occurs, the ceramic of the bearing material has a high Young's modulus and is difficult to elastically deform, so the surface pressure, which is the load per unit area at the contact part, increases and the bearing sliding surface The temperature may rise abnormally and reach the shrink fitting temperature of the ceramic bearing 03 and the bearing case 02 or higher.
【０００４】 その結果、軸受ケース０２からのセラミック軸受０３の脱落や、セラミック軸 受０３と回転軸０４との共回りによる破損につながったり、軸受の摺動面に面荒 れが生じ摩耗を助長する原因となる。このようにセラミック軸受０３が異常に摩 耗したり破損すると、回転軸０４を正常に支承することができず、ポンプは運転 不能に至る。 前記片当り発生を防止すべくセラミック軸受０３の外周部に弾性体を挿入した 例もあるが、回転軸０４から軸受に作用する荷重を安定して支承するためには十 分に剛性の高い弾性体を使用する必要があり的確な対応にはなっていない。As a result, the ceramic bearing 03 is dropped from the bearing case 02, the ceramic bearing 03 and the rotary shaft 04 are rotated together, and the sliding surface of the bearing is roughened to promote wear. Cause If the ceramic bearing 03 is abnormally worn or damaged in this way, the rotating shaft 04 cannot be normally supported, and the pump cannot operate. Although there is an example in which an elastic body is inserted in the outer peripheral portion of the ceramic bearing 03 in order to prevent the occurrence of the one-sided contact, in order to stably support the load acting on the bearing from the rotary shaft 04, an elastic body having sufficiently high rigidity is used. It is necessary to use the body and it is not an appropriate response.
【０００５】 本考案の目的は前記問題点を解決し、回転軸がセラミック軸受に片当りするこ となく、軸受面に作用する単位面積当りの荷重が低く抑えられ、摺動部での発熱 が少なく、良好な軸受作用を維持し得る軸受材にセラミックを使用した軸受装置 を提供するにある。The object of the present invention is to solve the above-mentioned problems, and the load per unit area acting on the bearing surface can be suppressed to a low level without the rotating shaft being unevenly contacted with the ceramic bearing, and the heat generated at the sliding portion can be reduced. It is an object of the present invention to provide a bearing device that uses a ceramic as a bearing material that is small and that can maintain a good bearing action.
【０００６】[0006]
第１考案の軸受装置は、軸受材料にセラミックを使用した軸受装置において、 ケーシング１に固定された軸受ケース２と、内周が軸受面となって回転軸８のラ ジアル荷重を支承する円筒状のセラミック軸受３と、該セラミック軸受の外周と 焼ばめによって一体に形成され且つ外周面は軸方面に曲率を有する曲面となって いる金属リテーナ４と、該金属リテーナの外側に嵌入され内周面が金属リテーナ の外周の曲面と線接触する円筒状の金属ホルダ５と、該金属ホルダと前記軸受ケ ースの間に介設された弾性体６と、前記金属リテーナと軸受ケースの間に配設さ れた支持板７とを有してなることを特徴とする。 The bearing device of the first invention is a bearing device using a ceramic as a bearing material, which is a bearing case 2 fixed to a casing 1 and a cylindrical shape for supporting a radial load of the rotating shaft 8 with an inner periphery serving as a bearing surface. Ceramic bearing 3, a metal retainer 4 which is integrally formed with the outer circumference of the ceramic bearing by shrink fitting, and has an outer peripheral surface which is a curved surface having a curvature in the axial direction, and an inner peripheral surface which is fitted to the outer side of the metal retainer. A cylindrical metal holder 5 whose surface is in line contact with the curved surface of the outer periphery of the metal retainer, an elastic body 6 interposed between the metal holder and the bearing case, and between the metal retainer and the bearing case. It is characterized by having a support plate 7 arranged.
【０００７】 第２考案は、前記第１考案による軸受装置において、金属リテーナ４の外周の 曲面と接する金属ホルダ５の内周部に発生するヘルツ応力が、金属リテーナ材料 の降伏応力もしくは金属ホルダ材料の降伏応力のうち低い方の降伏応力より小さ くなるように金属リテーナ４の外周の軸方向の曲率を設定したことを特徴として いる。According to a second aspect of the invention, in the bearing device according to the first aspect, the Hertzian stress generated in the inner peripheral portion of the metal holder 5 which is in contact with the curved surface of the outer periphery of the metal retainer 4 is the yield stress of the metal retainer material or the metal holder material. It is characterized in that the axial curvature of the outer circumference of the metal retainer 4 is set so as to be smaller than the lower one of the yield stresses of 1.
【０００８】[0008]
【作用】 第１考案の構成によれば、金属リテーナ４の外周が軸方向に曲率をもった曲面 になっており金属ホルダ５の内周と線接触となっているため、軸方向の傾斜に対 する規制力がほとんど無く回転軸８の傾斜に容易に追従するので、回転軸８がセ ラミック軸受３に片当りすることを防止し得る。なお金属ホルダ５と軸受ケース ２の間には弾性体６が介装されているので、もしセラミック軸受３に衝撃荷重が 作用しても、衝撃力は弾性体６によって緩衝されセラミック軸受３が破損するこ とは無い。According to the configuration of the first invention, since the outer periphery of the metal retainer 4 is a curved surface having a curvature in the axial direction and is in line contact with the inner periphery of the metal holder 5, there is no inclination in the axial direction. Since there is almost no restricting force against it, the inclination of the rotary shaft 8 is easily followed, so that the rotary shaft 8 can be prevented from hitting the ceramic bearing 3 in one direction. Since the elastic body 6 is interposed between the metal holder 5 and the bearing case 2, even if an impact load is applied to the ceramic bearing 3, the impact force is buffered by the elastic body 6 and the ceramic bearing 3 is damaged. There is no such thing.
【０００９】 第２考案では金属ホルダ５の内周部に発生するヘルツ応力が、金属リテーナ材 料と金属ホルダ材料の降伏応力を越えないように金属リテーナ４の外周の軸方向 の曲率が設定されているので、曲面の線接触部が塑性変形してへたるようなこと なく、良好な傾斜追従性が維持される。In the second invention, the axial curvature of the outer circumference of the metal retainer 4 is set so that the Hertz stress generated in the inner peripheral portion of the metal holder 5 does not exceed the yield stress of the metal retainer material and the metal holder material. Therefore, the line contact portion of the curved surface is not plastically deformed and sagging, and good inclination followability is maintained.
【００１０】[0010]
図１に第１考案の実施例に係る軸受装置の縦断面図を示し、図２に図１におけ るII−II矢視の横断面図を示した。図１，２を参照して実施例の構成について説 明する。 軸受ケース２はポンプのケーシング１に固定して装着されている。軸受ケース ２の内面には複数列の円周方向の溝を形成し弾性体６が配設されている。弾性体 ６を介在させて軸受ケース２の内部に円筒状の金属ホルダ５が嵌入されている。 該金属ホルダの内周面にはセラミック軸受３の外周に焼きばめした金属リテーナ ４の外周の曲面が線接触している。金属リテーナ４は支持板７を介して軸受ケー ス２により保持されている。回転軸はセラミック軸受３に挿入されそのラジアル 荷重が支承されている。 FIG. 1 shows a longitudinal sectional view of a bearing device according to an embodiment of the first invention, and FIG. 2 shows a transverse sectional view taken along the line II-II in FIG. The configuration of the embodiment will be described with reference to FIGS. The bearing case 2 is fixedly mounted on the casing 1 of the pump. A plurality of rows of circumferential grooves are formed on the inner surface of the bearing case 2 and elastic bodies 6 are arranged therein. A cylindrical metal holder 5 is fitted inside the bearing case 2 with an elastic body 6 interposed. The curved surface of the outer periphery of the metal retainer 4 which is shrink-fitted to the outer periphery of the ceramic bearing 3 is in line contact with the inner peripheral surface of the metal holder. The metal retainer 4 is held by the bearing case 2 via the support plate 7. The rotary shaft is inserted in the ceramic bearing 3 and bears its radial load.
【００１１】 次にその作用について説明する。 回転軸８が流体力等によって傾斜したり、加工誤差等による軸受ケース２の軸 方向傾斜などが発生しても、金属リテーナ４の外周面が軸方向に曲率を有する曲 面で形成され金属ホルダ５の内面に線接触しているため、該接触部を支点として 軸方向への傾斜に対して規制力がほとんど無く追従が容易となるため、セラミッ ク軸受の端部が回転軸８と接触するような片当り障害が発生せず良好な軸受作用 が維持される。Next, the operation will be described. Even if the rotating shaft 8 is tilted by a fluid force or the like or the bearing case 2 is tilted in the axial direction due to a processing error or the like, the metal retainer 4 has an outer peripheral surface formed of a curved surface having an axial curvature. Since it is in line contact with the inner surface of No. 5, there is almost no regulation force with respect to the tilt in the axial direction with the contact portion as a fulcrum, and it is easy to follow, so the end of the ceramic bearing comes into contact with the rotating shaft 8. Good bearing action is maintained without such a one-sided contact failure.
【００１２】 また、金属リテーナ４の外周の曲面と線接触する金属ホルダ５の内周に発生す るヘルツ応力が、金属リテーナ４と金属ホルダ５の材料の降伏応力より小さくな るように金属リテーナ４の外周の軸方向の曲率を設定しているので、接触部が塑 性変形してへたりを生ずるようなことも無く、傾斜追従性が良好に維持される。Further, the Hertzian stress generated on the inner circumference of the metal holder 5 that is in line contact with the curved surface of the outer circumference of the metal retainer 4 is smaller than the yield stress of the material of the metal retainer 4 and the metal holder 5. Since the curvature of the outer circumference of No. 4 in the axial direction is set, there is no possibility that the contact portion is plastically deformed to cause fatigue, and the inclination followability is maintained well.
【００１３】[0013]
本考案により、セラミック軸受３に回転軸８が片当りすることなく、軸受に作 用する単位接触面積当りの荷重も低く抑えられ、軸受面での発熱も少なく、焼付 くこともなく良好な軸受作用が得られる。 図３は本考案の効果を運転時間と軸受温度の関係で示した説明図である。セラ ミック軸受に回転軸の片当りが発生した場合は、軸受面の面圧が増大して異常発 熱し、温度が急上昇して焼ばめ温度を越えるようになりセラミック軸受３が脱落 したり破損に至ることがある。これに対し本考案によれば片当りが発生せず温度 上昇もわずかで良好な軸受作用が維持される。 According to the present invention, the rotating shaft 8 does not hit the ceramic bearing 3 one-sidedly, the load per unit contact area used for the bearing is kept low, the heat generation on the bearing surface is small, and the bearing does not seize. The action is obtained. FIG. 3 is an explanatory diagram showing the effect of the present invention in terms of the relationship between operating time and bearing temperature. When the rotating shaft is partially hit on the ceramic bearing, the bearing surface pressure increases and abnormal heat is generated. The temperature rises rapidly and exceeds the shrink fit temperature, causing the ceramic bearing 3 to drop off or become damaged. May lead to. On the other hand, according to the present invention, one-sided contact does not occur, the temperature rises only slightly, and good bearing action is maintained.
【図１】第１考案の実施例に係る軸受装置の縦断面図FIG. 1 is a vertical sectional view of a bearing device according to an embodiment of the first invention.
【図２】図１におけるII−II矢視の横断面図FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
【図３】第１考案の効果を運転時間と軸受温度の関係で
示した説明図FIG. 3 is an explanatory diagram showing the effect of the first invention in relation to operating time and bearing temperature.
【図４】従来の技術による軸受装置の縦断面図FIG. 4 is a vertical sectional view of a bearing device according to a conventional technique.
【図５】図４におけるＶ−Ｖ矢視の横断面図5 is a cross-sectional view taken along the line VV in FIG.
１…ケーシング、２…軸受ケース、３…セラミック軸
受、４…金属リテーナ、５…金属ホルダ、６…弾性体、
７…支持板、８…回転軸。1 ... Casing, 2 ... Bearing case, 3 ... Ceramic bearing, 4 ... Metal retainer, 5 ... Metal holder, 6 ... Elastic body,
7 ... Support plate, 8 ... Rotating shaft.
Claims (2)
置において、ケーシング（１）に固定された軸受ケース
（２）と、内周が軸受面となって回転軸（８）のラジア
ル荷重を支承する円筒状のセラミック軸受（３）と、該
セラミック軸受の外周と焼ばめによって一体に形成され
且つ外周面は軸方向に曲率を有する曲面となっている金
属リテーナ（４）と、該金属リテーナの外側に嵌入され
内周面が金属リテーナの外周の曲面と線接触する円筒状
の金属ホルダ（５）と、該金属ホルダと前記軸受ケース
の間に介設された弾性体（６）と、前記金属リテーナと
軸受ケースの間に配設された支持板（７）とを有してな
ることを特徴とする軸受装置。1. In a bearing device using ceramic as a bearing material, a bearing case (2) fixed to a casing (1) and a bearing surface whose inner circumference serves as a bearing surface to support a radial load of a rotating shaft (8). A cylindrical ceramic bearing (3), a metal retainer (4) integrally formed with the outer periphery of the ceramic bearing by shrink fitting, and the outer peripheral surface of which is a curved surface having a curvature in the axial direction; A cylindrical metal holder (5) fitted outside and having an inner peripheral surface in line contact with the curved surface of the outer periphery of the metal retainer; an elastic body (6) interposed between the metal holder and the bearing case; A bearing device comprising a support plate (7) disposed between a metal retainer and a bearing case.
属リテーナ（４）の外周の曲面と接する金属ホルダ
（５）の内周部に発生するヘルツ応力が、金属リテーナ
材料の降伏応力もしくは金属ホルダ材料の降伏応力のう
ち低い方の降伏応力より小さくなるように金属リテーナ
（４）の外周の軸方向の曲率を設定したことを特徴とす
る軸受装置。2. The bearing device according to claim 1, wherein the Hertzian stress generated in the inner peripheral portion of the metal holder (5) in contact with the curved surface of the outer periphery of the metal retainer (4) is the yield stress of the metal retainer material or the metal. A bearing device characterized in that an axial curvature of an outer circumference of the metal retainer (4) is set so as to be smaller than a lower yield stress of the yield stress of the holder material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5555093U JPH0720422U (en) | 1993-09-20 | 1993-09-20 | Bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5555093U JPH0720422U (en) | 1993-09-20 | 1993-09-20 | Bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0720422U true JPH0720422U (en) | 1995-04-11 |
Family
ID=13001820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5555093U Withdrawn JPH0720422U (en) | 1993-09-20 | 1993-09-20 | Bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101388377B1 (en) * | 2013-11-06 | 2014-04-24 | 정종술 | Reducer |
-
1993
- 1993-09-20 JP JP5555093U patent/JPH0720422U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101388377B1 (en) * | 2013-11-06 | 2014-04-24 | 정종술 | Reducer |
| WO2015068986A1 (en) * | 2013-11-06 | 2015-05-14 | 정종술 | Bearing assembly and rotating machine including same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980305 |