JPH0835524A - Sealing device for bearing - Google Patents
Sealing device for bearingInfo
- Publication number
- JPH0835524A JPH0835524A JP17301794A JP17301794A JPH0835524A JP H0835524 A JPH0835524 A JP H0835524A JP 17301794 A JP17301794 A JP 17301794A JP 17301794 A JP17301794 A JP 17301794A JP H0835524 A JPH0835524 A JP H0835524A
- Authority
- JP
- Japan
- Prior art keywords
- lip
- radial direction
- sealing device
- seal groove
- 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
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軸受内部からの潤滑剤
の漏れや、外部からの異物の侵入を防止するための密封
装置に関し、特に接触型の密封装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for preventing leakage of a lubricant from the inside of a bearing and intrusion of foreign matter from the outside, and more particularly to a contact type sealing device.
【０００２】[0002]
【従来の技術】軸受の密封装置の一つに、回転側の軌道
輪に設けたシール溝にリップを接触させてリップと当該
軌道輪との間を密封する接触型と呼ばれるものがある。2. Description of the Related Art As one of bearing sealing devices, there is a contact type device in which a lip is brought into contact with a seal groove provided in a rotating ring to seal between the lip and the ring.
【０００３】このタイプの密封装置は、例えば、図３
（ａ）に示すように、外輪（20）の内周面に設けた取付
溝（21）に略環状のシール本体（22）を取り付け、この
シール本体（22）のリップ（23）を内輪（24）の外周面
に形成したシール溝（25）に摺接させることにより構成
される。This type of sealing device is shown, for example, in FIG.
As shown in (a), a substantially annular seal body (22) is attached to a mounting groove (21) provided on the inner peripheral surface of the outer ring (20), and a lip (23) of the seal body (22) is attached to the inner ring ( It is configured by slidingly contacting a seal groove (25) formed on the outer peripheral surface of 24).
【０００４】[0004]
【発明が解決しようとする課題】ところで、接触型の密
封装置では、リップ（23）とシール溝（25）との間に滑
りが生じる。そのため、軸受の使用条件によっては、両
者の摺接部分でいわゆるスティックスリップが生じ、リ
ップ（23）が自励振動して耳障りな鳴き音を発生する場
合がある。In the contact type sealing device, slippage occurs between the lip (23) and the seal groove (25). Therefore, depending on the usage conditions of the bearing, so-called stick-slip may occur at the sliding contact portion between the two, and the lip (23) may vibrate by self-excitation to generate a jarring squeal.
【０００５】そこで、本発明は、このようなシール鳴き
音の発生を防止することのできる軸受の密封装置の提供
を目的とする。Therefore, an object of the present invention is to provide a bearing sealing device capable of preventing the generation of such a seal squeal.
【０００６】[0006]
【課題を解決するための手段】上記目的達成のため、本
発明では、一方の軌道輪に設けられたシール溝と摺接す
るリップを備える軸受の密封装置において、リップをラ
ジアル方向から前記シール溝に接触させると共に、リッ
プの一部で且つ前記軌道輪との摺接部よりも他方の軌道
輪側にラジアル方向に向けて延びる垂直部を設けること
とした。In order to achieve the above object, in the present invention, in a bearing sealing device having a lip which is in sliding contact with a seal groove provided in one of the bearing rings, the lip is provided from the radial direction to the seal groove. In addition to the contact, a vertical portion extending in the radial direction is provided on a part of the lip and on the other race ring side from the sliding contact portion with the race ring.
【０００７】また、一方の軌道輪に設けられたシール溝
と摺接するリップを備える軸受の密封装置において、リ
ップをラジアル方向から前記シール溝に接触させると共
に、前記シール溝の面粗さを1S〜6Sに設定することとし
た。Further, in a bearing sealing device having a lip which is in sliding contact with a seal groove provided on one of the bearing rings, the lip is brought into contact with the seal groove in the radial direction, and the surface roughness of the seal groove is from 1S to I decided to set it to 6S.
【０００８】一方の軌道輪に設けられたシール溝と摺接
するリップを備える軸受の密封装置において、リップを
ラジアル方向から前記シール溝に接触させると共に、リ
ップの一部で且つ前記軌道輪との摺接部よりも他方の軌
道輪側にラジアル方向に向けて延びる垂直部を設け、前
記シール溝の面粗さを1S〜6Sに設定してもよい。In a bearing sealing device having a lip which is in sliding contact with a seal groove provided on one raceway ring, the lip is brought into contact with the seal groove in the radial direction, and a part of the lip slides on the raceway ring. A vertical portion extending in the radial direction may be provided on the other raceway side of the contact portion, and the surface roughness of the seal groove may be set to 1S to 6S.
【０００９】[0009]
【作用】本出願人の研究により、鳴き音の発生原因とし
て以下に掲げる３つの要因が明らかになった。[Function] According to the research conducted by the applicant, the following three factors have been clarified as the causes of the squeaking noise.
【００１０】 密封装置がアキシャル接触型である場
合に鳴き音が発生しやすい。ここで、アキシャル接触型
とは、図３（ａ）に示すように、リップ（23）をアキシ
ャル方向からシール溝（25）に接触させたものをいう。
これに対し、同図（ｂ）に示すように、リップ（23’）
をラジアル方向からシール溝（25’）に接触させたラジ
アル接触型の密封装置では、スティックスリップが生じ
にくく、鳴き音発生の抑制効果も大である。本発明の密
封装置は、図１に示すように、リップ（12）をラジアル
方向からシール面（15）に接触させたラジアル接触型で
あるから、鳴き音の発生を防止することができる。When the sealing device is an axial contact type, squeaking noise is likely to occur. Here, the axial contact type means that the lip (23) is brought into contact with the seal groove (25) from the axial direction, as shown in FIG. 3 (a).
On the other hand, as shown in FIG. 2B, the lip (23 ')
In the radial contact type sealing device in which is contacted with the seal groove (25 ') in the radial direction, stick-slip is unlikely to occur, and the squeaking noise is effectively suppressed. As shown in FIG. 1, the sealing device of the present invention is a radial contact type in which the lip (12) is brought into contact with the sealing surface (15) in the radial direction, so that the generation of squeaking noise can be prevented.
【００１１】 リップの剛性が不足していると鳴き音
が発生し易くなる。リップの剛性が不足していると、内
輪に連れ回って回転するリップが遠心力の影響を受けて
大きく変形するため、リップと内輪の滑り面積が変化し
てスティックスリップ現象を生じ易くなると考えられ
る。リップの剛性を高めるには、リップを厚くしたり短
くするのが簡単であるが、これでは、リップの弾性が低
下し、シール機能の低下や軸トルクの増大等の弊害を招
くおそれがある。本発明では、リップの一部で且つ前記
軌道輪との摺接部よりも他方の軌道輪側にラジアル方向
に向けて延びる垂直部を設け、リップの体積を増大させ
ているので、リップの弾性を低下させることなくその剛
性をラジアル方向で増大させることができる。When the rigidity of the lip is insufficient, a squeaking sound is likely to occur. When the rigidity of the lip is insufficient, the lip that rotates along with the inner ring is greatly deformed due to the influence of centrifugal force, and it is considered that the slip area of the lip and the inner ring changes and the stick-slip phenomenon easily occurs. . In order to increase the rigidity of the lip, it is easy to make the lip thicker or shorter, but this reduces the elasticity of the lip, which may cause adverse effects such as a decrease in sealing function and an increase in axial torque. In the present invention, since the vertical portion extending in the radial direction is provided on a portion of the lip and on the other bearing ring side from the sliding contact portion with the bearing ring, the lip volume is increased, and thus the elasticity of the lip is increased. The rigidity can be increased in the radial direction without decreasing
【００１２】 シール溝の面粗さが小さすぎると鳴き
音が発生し易くなる。即ち、鳴き音の発生を防止するた
めには、シール溝に適度の面粗さが必要となる。従来で
は、摩耗の抑制等の観点からシール溝を鏡面仕上げと
し、その面粗さを可能な限り小さく（1Sよりも小さく）
しているが、このように面粗さを小さくすると、スティ
ックスリップが生じ易くなる。その一方、面粗さを過度
に大きくすると、シール溝やリップの摩耗を早めてしま
うので、この点にも配慮する必要がある。本発明の密封
装置では、シール溝の面粗さを1S以上としているので、
スティックスリップ現象を防止することができる。その
一方で、シール溝の面粗さを6S以下としているので、シ
ール溝やリップの摩耗が問題となることもない。If the surface roughness of the seal groove is too small, a squeaking noise is likely to occur. That is, in order to prevent the generation of squeaking noise, the seal groove needs to have an appropriate surface roughness. Conventionally, the seal groove is mirror-finished from the viewpoint of suppressing wear and the surface roughness is as small as possible (smaller than 1S).
However, if the surface roughness is reduced in this way, stick slip easily occurs. On the other hand, if the surface roughness is excessively large, the wear of the seal groove and the lip will be accelerated, and it is necessary to consider this point as well. In the sealing device of the present invention, since the surface roughness of the seal groove is 1S or more,
The stick-slip phenomenon can be prevented. On the other hand, since the surface roughness of the seal groove is 6S or less, the wear of the seal groove and the lip does not pose a problem.
【００１３】[0013]
【実施例】以下、本発明を玉軸受に適用した場合の実施
例を図１及び図２に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ball bearing will be described below with reference to FIGS.
【００１４】図１に示すように、玉軸受は、内輪
（１）、外輪（２）、内・外輪（１）（２）間に介在す
る複数のボール（図示省略）、ボールを等間隔で保持す
る保持器（３）、内・外輪（１）（２）間の隙間の両端
部に配置した密封装置（５）で構成される。As shown in FIG. 1, the ball bearing has an inner ring (1), an outer ring (2), a plurality of balls (not shown) interposed between the inner and outer rings (1) and (2), and the balls at equal intervals. It is composed of a retainer (3) for holding and a sealing device (5) arranged at both ends of the gap between the inner and outer rings (1), (2).
【００１５】密封装置（５）は、合成ゴム材等からなる
シール本体（６）とシール本体（６）を補強するための
金属製の芯金（７）とで構成され、その外径端は外輪
（２）の両端内径部に設けられた取付溝（８）に嵌着さ
れている。The sealing device (5) is composed of a seal body (6) made of synthetic rubber material and a metal cored bar (7) for reinforcing the seal body (6), and its outer diameter end is The outer ring (2) is fitted into the mounting grooves (8) provided on the inner diameters of both ends.
【００１６】シール本体（６）の内径端部には、内径部
を軸受外部側に傾けた接触片（10）と、この接触片（1
0）の外輪側（外径側）に一体形成した垂直部（11）と
からなるリップ（12）が設けられる。垂直部（11）は、
接触片（10）と略等しい肉厚で且つラジアル方向に向け
て環状に形成されている。本実施例では、接触片（10）
を軸受外部側に傾けているが、これとは反対に保持器
（３）側に傾けておいてもよい。At the inner diameter end of the seal body (6), a contact piece (10) having the inner diameter inclined to the outside of the bearing, and the contact piece (1
A lip (12) including a vertical portion (11) integrally formed on the outer ring side (outer diameter side) of (0) is provided. The vertical part (11)
The contact piece (10) has a thickness substantially equal to that of the contact piece (10) and is formed in an annular shape in the radial direction. In this embodiment, the contact piece (10)
Is tilted to the outside of the bearing, but it may be tilted to the side of the retainer (3) on the contrary.
【００１７】内輪（１）の両端外径部には、シール溝
（14）が形成される。このシール溝（14）は、内輪
（１）の外径面と略平行のシール面（15）と、軸受外部
側に向けて下り傾斜面を形成するテーパ面（16）とで構
成され、このうち少なくともシール面（15）は、従来の
鏡面仕上げと異なり、面粗さ1S〜6S（0.2a〜1.0a）程度
の研磨仕上げとされている。Sealing grooves (14) are formed on the outer diameter portions of both ends of the inner ring (1). The seal groove (14) is composed of a seal surface (15) substantially parallel to the outer diameter surface of the inner ring (1) and a taper surface (16) forming a downward inclined surface toward the outside of the bearing. Of these, at least the seal surface (15) is different from the conventional mirror finish, and has a polished finish with a surface roughness of about 1S to 6S (0.2a to 1.0a).
【００１８】シール面（15）には、リップ（12）の接触
片（10）が接触している。即ち、この密封装置（５）
は、リップ（12）をラジアル方向からシール溝（14）に
接触させたラジアル接触型である。The contact surface (15) of the lip (12) is in contact with the sealing surface (15). That is, this sealing device (5)
Is a radial contact type in which the lip (12) is brought into contact with the seal groove (14) from the radial direction.
【００１９】このように、本発明では、リップ（12）を
ラジアル方向からシール溝（14）に接触させると共に、
リップ（12）の一部で且つ接触片（10）よりも外輪
（２）側にラジアル方向に延びる垂直部（11）を設け、
しかもリップ（12）の接触片（10）と摺接するシール面
（15）の面粗さを1S〜6S（0.2a〜1.0a）程度に設定して
いるので、スティックスリップに起因する鳴き音の発生
を防止することができる。また、ラジアル方向に延びる
垂直部（11）を設けてリップ（12）の剛性強化を達成し
ているので、剛性強化に伴ってリップ（12）の弾性が低
下することもなく、シール機能の低下や軸トルクの増大
等の不具合を招くおそれもない。As described above, according to the present invention, the lip (12) is brought into contact with the seal groove (14) from the radial direction, and
A vertical portion (11) extending in the radial direction is provided on a part of the lip (12) and on the outer ring (2) side of the contact piece (10),
Moreover, since the surface roughness of the seal surface (15) that is in sliding contact with the contact piece (10) of the lip (12) is set to about 1S to 6S (0.2a to 1.0a), the squeal noise caused by stick-slip Occurrence can be prevented. Further, since the vertical portion (11) extending in the radial direction is provided to enhance the rigidity of the lip (12), the elasticity of the lip (12) does not decrease with the increase in rigidity and the sealing function decreases. There is no possibility of causing a problem such as an increase in shaft torque.
【００２０】なお、以上の説明は、本発明を玉軸受に適
用したものであるが、本発明は、内輪回転型、外輪回転
型を問わず、広く転がり軸受一般に適用可能である。ま
た、シール本体（６）を内輪（１）に嵌着してリップ
（12）を外輪（２）に設けたシール溝に摺接させても同
様の効果を得ることができる。Although the above description applies the present invention to a ball bearing, the present invention can be widely applied to rolling bearings in general regardless of the inner ring rotating type and the outer ring rotating type. Also, the same effect can be obtained by fitting the seal body (6) to the inner ring (1) and sliding the lip (12) into the seal groove provided on the outer ring (2).
【００２１】[0021]
【発明の効果】このように本発明によれば、リップと軌
道輪の摺接部で生じるスティックスリップ現象を回避す
ることができ、これに起因する耳障りな鳴き音の発生を
簡単な構造で確実に防止することができる。As described above, according to the present invention, it is possible to avoid the stick-slip phenomenon that occurs at the sliding contact portion between the lip and the bearing ring, and to reliably generate annoying squeaking sound due to this with a simple structure. Can be prevented.
【００２２】この効果を確認するため、従来のアキシャ
ル接触型密封装置（図３（ａ））と本発明にかかる密封
装置（垂直部（11）を有するラジアル接触型密封装置：
図１参照）について、それぞれ外輪を回転させて鳴き音
発生の有無を実験を行なったところ、図２（ａ）（ｂ）
に示す結果が得られた。このうち、（ａ）図は、従来の
アキシャル接触型密封装置についての実験結果であり
（シール溝面粗さ＝1s）、（ｂ）図は、本発明にかかる
密封装置についての実験結果である（シール溝面粗さ＝
3s）。In order to confirm this effect, a conventional axial contact type sealing device (FIG. 3 (a)) and a sealing device according to the present invention (a radial contact type sealing device having a vertical portion (11):
2) (a) and (b) when the outer ring was rotated and the squeaking noise was generated.
The result shown in FIG. Among them, (a) is an experimental result of a conventional axial contact type sealing device (sealing groove surface roughness = 1 s), and (b) is an experimental result of the sealing device according to the present invention. (Roughness of seal groove surface =
3s).
【００２３】この実験結果から、本発明の密封装置で
は、回転数ｎ＝2000〜7000 rpm、軸受温度30〜140 ℃の
範囲内で鳴き音を確実に排除できるのに対し、アキシャ
ル接触タイプの密封装置では同条件でも鳴き音が発生す
ることが理解できる。From the results of this experiment, in the sealing device of the present invention, the squeaking noise can be surely eliminated within the range of the rotation speed n = 2000 to 7000 rpm and the bearing temperature of 30 to 140 ° C., while the sealing of the axial contact type is used. It can be understood that the device produces a squeal under the same conditions.
【００２４】なお、図２（ｂ）において、シール脱脂製
品のデータ（△で示す）も並記したのは、シール溝（1
4）に油が存在すると、滑りがよくなってスティックス
リップが生じにくくなり、スティックスリップの抑制効
果を正しく評価できなくなるからである。In addition, in FIG. 2B, the data of the degreased seal products (shown by Δ) are also shown in parallel with the seal groove (1
This is because if oil is present in 4), slipping will improve and stick-slip will be less likely to occur, making it impossible to correctly evaluate the stick-slip suppressing effect.
【図１】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】従来の密封装置と本発明にかかる密封装置との
比較実験の結果を示すグラフである。FIG. 2 is a graph showing a result of a comparative experiment between a conventional sealing device and a sealing device according to the present invention.
【図３】従来の密封装置を示す断面図であり、（ａ）図
はアキシャル接触型の密封装置を、（ｂ）図はラジアル
接触型の密封装置を示す。3A and 3B are cross-sectional views showing a conventional sealing device, FIG. 3A shows an axial contact type sealing device, and FIG. 3B shows a radial contact type sealing device.
１ 内輪 ２ 外輪 ５ 密封装置 ６ シール本体 10 接触片 11 垂直部 12 リップ 14 シール溝 15 シール面 1 Inner ring 2 Outer ring 5 Sealing device 6 Seal body 10 Contact piece 11 Vertical part 12 Lip 14 Seal groove 15 Sealing surface
Claims (3)
接するリップを備える軸受の密封装置において、リップ
をラジアル方向から前記シール溝に接触させると共に、
リップの一部で且つ前記軌道輪との摺接部よりも他方の
軌道輪側にラジアル方向に向けて延びる垂直部を設けた
ことを特徴とする軸受の密封装置。1. A bearing sealing device comprising a lip which is in sliding contact with a seal groove provided on one of the bearing rings, wherein the lip is brought into contact with the seal groove in a radial direction, and
A bearing sealing device, wherein a vertical portion extending in the radial direction is provided on a part of the lip and on the other race ring side of the sliding contact portion with the race ring.
接するリップを備える軸受の密封装置において、リップ
をラジアル方向から前記シール溝に接触させると共に、
前記シール溝の面粗さを1S〜6Sに設定したことを特徴と
する軸受の密封装置。2. A sealing device for a bearing, comprising a lip which is in sliding contact with a seal groove provided on one of the bearing rings, wherein the lip is brought into contact with the seal groove in the radial direction,
A bearing sealing device, wherein the surface roughness of the seal groove is set to 1S to 6S.
接するリップを備える軸受の密封装置において、リップ
をラジアル方向から前記シール溝に接触させると共に、
リップの一部で且つ前記軌道輪との摺接部よりも他方の
軌道輪側にラジアル方向に向けて延びる垂直部を設け、
前記シール溝の面粗さを1S〜6Sに設定したことを特徴と
する軸受の密封装置。3. A bearing sealing device having a lip that is in sliding contact with a seal groove provided on one of the bearing rings, wherein the lip is brought into contact with the seal groove in the radial direction,
A vertical portion that is a part of the lip and that extends in the radial direction is provided on the other raceway side of the sliding contact portion with the raceway ring,
A bearing sealing device, wherein the surface roughness of the seal groove is set to 1S to 6S.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17301794A JP3358879B2 (en) | 1994-07-26 | 1994-07-26 | Bearing sealing device |
| DE19527340A DE19527340B4 (en) | 1994-07-26 | 1995-07-26 | Sealing device for bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17301794A JP3358879B2 (en) | 1994-07-26 | 1994-07-26 | Bearing sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0835524A true JPH0835524A (en) | 1996-02-06 |
| JP3358879B2 JP3358879B2 (en) | 2002-12-24 |
Family
ID=15952665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17301794A Expired - Lifetime JP3358879B2 (en) | 1994-07-26 | 1994-07-26 | Bearing sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3358879B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005040626A1 (en) * | 2003-10-28 | 2005-05-06 | Ntn Corporation | Sealed roller bearing |
| JP2010265968A (en) * | 2009-05-13 | 2010-11-25 | Nakanishi Metal Works Co Ltd | Dynamic seal |
| CN103967937A (en) * | 2014-05-26 | 2014-08-06 | 江苏万达特种轴承有限公司 | Ultra-wide lip contact sealed bearing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013133853A (en) | 2011-12-26 | 2013-07-08 | Minebea Co Ltd | Rolling bearing |
-
1994
- 1994-07-26 JP JP17301794A patent/JP3358879B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005040626A1 (en) * | 2003-10-28 | 2005-05-06 | Ntn Corporation | Sealed roller bearing |
| US7497630B2 (en) | 2003-10-28 | 2009-03-03 | Ntn Corporation | Sealed rolling bearing |
| JP2010265968A (en) * | 2009-05-13 | 2010-11-25 | Nakanishi Metal Works Co Ltd | Dynamic seal |
| CN103967937A (en) * | 2014-05-26 | 2014-08-06 | 江苏万达特种轴承有限公司 | Ultra-wide lip contact sealed bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3358879B2 (en) | 2002-12-24 |
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