JP2833606B2 - Bearing seal device for water pump - Google Patents
Bearing seal device for water pumpInfo
- Publication number
- JP2833606B2 JP2833606B2 JP2572497A JP2572497A JP2833606B2 JP 2833606 B2 JP2833606 B2 JP 2833606B2 JP 2572497 A JP2572497 A JP 2572497A JP 2572497 A JP2572497 A JP 2572497A JP 2833606 B2 JP2833606 B2 JP 2833606B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- shaft
- lip
- seal
- seal ring
- 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
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の水冷エンジン
等に好適なウォータポンプ用軸受シール装置、詳しく
は、ウォータポンプ回転軸を支持する軸受内に水、水蒸
気などが侵入するのを防止し、同時に軸受内のグリース
の流出を防止する軸受シール装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a water pump suitable for a water-cooled engine of an automobile, and more particularly, to a device for preventing water, steam and the like from entering a bearing for supporting a rotating shaft of a water pump. Also, the present invention relates to a bearing seal device for simultaneously preventing grease from flowing out of a bearing.
【０００２】[0002]
【従来の技術】エンジンの冷却水を圧送するウォータポ
ンプは一般に、インペラが固定された回転軸を、軸方向
に間隔を置いて配した複数個のベアリング（転がり軸
受）によりケーシングに支承して形成され、通常のポン
プと同様に上記軸受内への冷却水の侵入を防止するた
め、軸受はシール付き密封軸受となっている。2. Description of the Related Art Generally, a water pump for pumping cooling water for an engine is formed by supporting a rotating shaft, to which an impeller is fixed, on a casing by a plurality of bearings (rolling bearings) arranged at intervals in the axial direction. The bearing is a sealed bearing with a seal in order to prevent the cooling water from entering the bearing as in the case of a normal pump.
【０００３】[0003]
【発明が解決しようとする課題】ところがエンジンにお
いては運転、停止が繰り返されるため、上記シール付き
密封軸受は加熱、冷却されて膨張、収縮を繰り返し、シ
ール機能を損ないやすくなっている。However, since the running and stopping of the engine are repeated, the sealed bearing with the seal is repeatedly heated and cooled, and expands and contracts repeatedly, thereby easily impairing the sealing function.
【０００４】特にエンジン運転時にエンジン冷却水が加
熱されることによって発生した水蒸気は、シール装置を
通過して軸受内に侵入しやすくなる。ポンプ回転軸を支
持する軸受内には通常、軸受を潤滑するグリース等の潤
滑剤が収納されているが、上述のようにして軸受内に冷
却水、水蒸気が侵入すると特にこの潤滑剤の潤滑性能、
耐久性が劣下して潤滑不良をきたしポンプ回転軸の回転
抵抗の増大や焼付き等を招く危険がある。[0004] In particular, steam generated by heating the engine cooling water during operation of the engine is likely to pass through the seal device and enter the bearing. Lubricants such as grease for lubricating the bearings are usually stored in the bearings that support the pump rotating shaft. However, when cooling water and water vapor enter the bearings as described above, the lubrication performance of these lubricants is particularly high. ,
There is a danger that poor durability results in poor lubrication, resulting in an increase in rotational resistance of the rotary shaft of the pump, seizure and the like.
【０００５】そこで、従来の軸受シール装置を見てみる
と、例えば実開昭６２−６６０２６号公報記載のものが
知られており、該公報の第２図、第３図および第４図に
開示されているように、軸受は外周部が外輪端部に固定
され、内周部に形成された複数のラジアルリップが軸の
外周面と摺接する構造のシール体によってシールされて
いる。しかし、この種の従来技術にあっては、内周部に
形成されたラジアルリップのみによってシールされてい
るため、エンジン運転時にエンジン冷却水が加熱される
ことによって発生した水蒸気が軸受内に侵入しやすい。A conventional bearing seal device is known, for example, from Japanese Unexamined Utility Model Publication No. 62-66026, which is disclosed in FIG. 2, FIG. 3 and FIG. As described above, the outer periphery of the bearing is fixed to the outer ring end, and a plurality of radial lips formed on the inner periphery are sealed by a seal body having a structure in which the radial lip is in sliding contact with the outer peripheral surface of the shaft. However, in this type of conventional technology, since the seal is provided only by the radial lip formed on the inner peripheral portion, steam generated by heating the engine cooling water during engine operation enters the bearing. Cheap.
【０００６】また、実開昭６０−１０７４５９号公報記
載のものも知られているが、該従来技術は、複数のラジ
アル接触リップを有する外輪環と、該外輪環のシールリ
ップと接触する金属で形成された内輪環とよりなり、外
輪環の主シールリップを小径側に、補助シールリップを
大径側にそれぞれ外方に突出させて設け、内輪環は外輪
環より小径で、複数の軸方向部をもち、主シールリップ
及び補助シールリップを内輪環のそれぞれの軸方向外周
面に接触させる構造のものであり、補助シールリップは
内輪環と４５゜の角度をもって接触している。しかし、
この種の従来技術にあっては、主シールリップ及び補助
シールリップの２重のシール構造により、エンジン運転
時にエンジン冷却水が加熱されることによって発生した
水蒸気が軸受内に入り込むのを防止するのは効果的であ
るが、主シールリップは外方に向け突出しているために
軸受内のグリースの流出を防止することは不十分であっ
た。[0006] Japanese Patent Application Laid-Open Publication No. Sho 60-107459 is also known, but the prior art discloses an outer ring having a plurality of radial contact lips, and a metal contacting a seal lip of the outer ring. A main seal lip of the outer ring is provided on the small diameter side, and an auxiliary seal lip is provided on the large diameter side so as to protrude outward.The inner ring has a smaller diameter than the outer ring and has a plurality of axial directions. In this structure, the main seal lip and the auxiliary seal lip are brought into contact with the respective outer peripheral surfaces of the inner ring in the axial direction, and the auxiliary seal lip contacts the inner ring at an angle of 45 °. But,
In this type of prior art, the double sealing structure of the main seal lip and the auxiliary seal lip prevents the steam generated by heating the engine cooling water during operation of the engine from entering the bearing. Was effective, but the main seal lip protruded outwardly, so that it was insufficient to prevent grease from flowing out of the bearing.
【０００７】また、実開昭６２−６９６２５号公報記載
のものも知られている。該従来技術は、自動車のホイー
ルを支持する軸受装置であり、そのシール装置は、補強
環と第１副リップと主リップと第２副リップを有する外
輪側シール環と、第１円筒部と中間部と第２円筒部とを
有する軸側シール環とが設けられており、第２副リップ
は、軸側シール環の内側でラビリンスシールを構成し、
補強環は、円筒部が外輪に固定され、それに続き内輪側
に真直ぐに延びる部分を有する。しかしながら、第１副
リップは補強環と離れており、剛性において劣る。[0007] Japanese Unexamined Utility Model Publication No. 62-69625 is also known. The prior art is a bearing device that supports a wheel of an automobile, and the sealing device includes an outer ring side seal ring having a reinforcing ring, a first sub lip, a main lip, and a second sub lip, a first cylindrical portion and an intermediate portion. A shaft-side seal ring having a portion and a second cylindrical portion, wherein the second sub-lip forms a labyrinth seal inside the shaft-side seal ring;
The reinforcing ring has a portion in which the cylindrical portion is fixed to the outer ring, and subsequently extends straight to the inner ring side. However, the first sub lip is separated from the reinforcing ring, and is inferior in rigidity.
【０００８】本発明は、従来技術の有するこのような問
題点に鑑みなされたものであり、その目的とするところ
は、軸受内部に侵入しようとする冷却水や水蒸気などを
ほぼ確実に防止し、同時に軸受内のグリースの流出を防
止するウォータポンプ用軸受シール装置を提供すること
である。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to almost certainly prevent cooling water, water vapor, and the like from entering a bearing. It is another object of the present invention to provide a bearing seal device for a water pump that prevents grease from flowing out of the bearing.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
の技術的手段は次の通りである。ケーシングに固定され
た外輪と、一端側にプーリを備え、他端側にインペラを
備えた回転する軸体との間に複数列の転動体を有し、か
つ前記外輪の両端部に固定されたシール環によって軸体
との間をシールしてなるウォータポンプ用軸受シール装
置において、前記シール環のうち、インペラ側のシール
環は、補強環とゴム、合成樹脂などの弾性体で形成した
第１副リップと主リップと、該主リップよりも外径側に
位置する第２副リップとを備えた外輪側シール環と、軸
体に嵌合固定された第１円筒部と、これよりも外径側に
延びた中間部とこれに続き軸方向に延びた第２円筒部と
を有し、軸体と共に回転する軸側シール環とで構成さ
れ、前記主リップが軸側シール環の第１円筒部の外周面
と摺接し、第１副リップが主リップより軸方向内側の回
転部材の外周面と摺接し、第２副リップが主リップより
も外径側で軸側シール環と摺接し、軸側シール環の外径
側に延びた部分は、外輪側シール環または外輪との間で
ラビリンスシールを構成していることである。また、補
強環は、一端部が外輪に固定され、円筒状に形成された
中間部を介して、他端部が軸体側に延びていることであ
る。The technical means for solving the above problems are as follows. A plurality of rows of rolling elements are provided between an outer ring fixed to a casing and a rotating shaft having a pulley on one end and an impeller on the other end, and fixed to both ends of the outer ring. In a bearing seal device for a water pump in which a seal ring seals between a shaft and a shaft, a seal ring on an impeller side of the seal ring is a first ring formed of a reinforcing ring and an elastic body such as rubber or synthetic resin. An outer ring side seal ring including a sub lip, a main lip, and a second sub lip located on an outer diameter side of the main lip; a first cylindrical portion fitted and fixed to a shaft body; A shaft-side seal ring having an intermediate portion extending radially and a second cylindrical portion extending in the axial direction following the intermediate portion, and configured to rotate with the shaft body, wherein the main lip is a first seal ring of the shaft-side seal ring. The first sub lip is in sliding contact with the outer peripheral surface of the cylindrical portion, The second sub lip is in sliding contact with the outer peripheral surface of the rolling member, the second sub lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip, and the portion extending to the outer diameter side of the shaft side seal ring is the outer ring side seal ring or the outer ring. And a labyrinth seal is formed between them. The reinforcing ring has one end fixed to the outer ring, and the other end extending toward the shaft via an intermediate portion formed in a cylindrical shape.
【００１０】[0010]
【作用】本発明の構成によれば、主リップが軸側シール
環の第１円筒部の外周面と摺接することにより、外部か
らの異物の侵入を防止し、第１副リップが回転部材の外
周面と摺接することにより、軸受内のグリースが洩れる
のを防止し、さらに第２副リップが主リップよりも外径
側で軸側シール環と摺接していること、及び軸側シール
環の中間部と第２円筒部により軸受側に侵入しようとす
る冷却水、水蒸気を振り切ることができる。さらに、軸
側シール環の外径側に延びた部分は、外輪側シール環ま
たは外輪との間でラビリンスシールを構成することによ
り、ウォータポンプ内の冷却水、水蒸気の侵入をくい止
めることができる。また、一端部を外輪に固定し、円筒
状に形成された中間部を介して他端部が軸体側に延びる
ように補強環を構成したので、第１副リップは緊迫力を
もって回転部材の外周面と摺接することができる。According to the structure of the present invention, the main lip is brought into sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, thereby preventing the invasion of foreign matter from the outside, and the first sub lip is formed of the rotating member. The sliding contact with the outer peripheral surface prevents the grease in the bearing from leaking, and the second sub-lip is in sliding contact with the shaft-side seal ring on the outer diameter side from the main lip. The intermediate portion and the second cylindrical portion can shake off the cooling water and steam that are going to enter the bearing side. Further, the portion extending to the outer diameter side of the shaft-side seal ring forms a labyrinth seal with the outer ring-side seal ring or the outer ring, so that the intrusion of cooling water and water vapor in the water pump can be suppressed. In addition, since the one end is fixed to the outer ring, and the reinforcing ring is formed so that the other end extends toward the shaft via the intermediate part formed in a cylindrical shape, the first sub lip has a tightening force so that the outer periphery of the rotating member can be tightened. Can be in sliding contact with the surface.
【００１１】[0011]
【実施例】以下図に基づいて本発明の技術的手段の一実
施例を説明する。図１は本発明装置を組込んだウォータ
ポンプの一例を示す要部縦断面図、図２は図１の要部拡
大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the technical means of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of an essential part showing an example of a water pump incorporating the device of the present invention, and FIG. 2 is an enlarged sectional view of an essential part of FIG.
【００１２】10はウォータポンプ用転がり軸受の全体を
表す。101 は転がり軸受10の外輪で、該外輪101 はケー
シング11の内周面に固定され、該外輪101 の内周面には
複数列の軌道溝1011が形成されると共にその両端部にシ
ール溝1012が形成されている。Reference numeral 10 denotes the whole of a rolling bearing for a water pump. Reference numeral 101 denotes an outer ring of the rolling bearing 10. The outer ring 101 is fixed to an inner peripheral surface of the casing 11, and a plurality of rows of raceway grooves 1011 are formed on the inner peripheral surface of the outer ring 101, and seal grooves 1012 are formed at both ends thereof. Are formed.
【００１３】12は前記外輪101 内に複数列の転動体13を
介して嵌挿された軸体で、該軸体12の一端側にはプーリ
130 を備え、他端側にはインペラ14を備えている（図１
参照）。121 は外輪101 の軌道溝1011と対向して軸体12
の外周面に形成された軌道溝である。Reference numeral 12 denotes a shaft fitted into the outer ring 101 via a plurality of rows of rolling elements 13. One end of the shaft 12 is provided with a pulley.
130 and an impeller 14 at the other end (see FIG. 1).
reference). 121 faces the raceway groove 1011 of the outer ring 101 and the shaft 12
Is a raceway groove formed on the outer peripheral surface of the.
【００１４】15は前記外輪101 のインペラ14側のシール
溝1012に固定された外輪側シール環151 と軸側シール環
152 からなるシール装置で、該シール装置15の外輪側シ
ール環151 は補強環1511とゴム、合成樹脂などの弾性体
でもって形成された少なくとも軸方向内向きの第１副リ
ップ1512と軸方向外向きの主リップ1513と該主リップ15
13よりも外径側に位置して軸方向外側に延びた第２副リ
ップ1514とから構成されてなる。また、補強環1511は一
端部1511a が外輪101 に固定され、円筒状に形成された
中間部1511b を介して他端部1511c が軸体側に延びてい
る。Reference numeral 15 denotes an outer ring side seal ring 151 and an axial side seal ring fixed to the seal groove 1012 of the outer ring 101 on the impeller 14 side.
An outer ring side seal ring 151 of the seal device 15 has a reinforcing ring 1511 and at least an axially inward first sub-lip 1512 formed of an elastic body such as rubber or synthetic resin and an axially outer seal ring 151. Oriented main lip 1513 and the main lip 15
13 and a second sub lip 1514 which is located on the outer diameter side and extends outward in the axial direction. One end 1511a of the reinforcing ring 1511 is fixed to the outer ring 101, and the other end 1511c extends toward the shaft via an intermediate portion 1511b formed in a cylindrical shape.
【００１５】次に、前記軸側シール環152 は耐腐蝕性に
とむ特殊鋼板例えばステンレス鋼板を用いて成形された
もので、その形状は断面ほぼコ字状にして前記軸体12に
緊密嵌合固定される第１円筒部1521とこれよりも外径側
に延びた中間部1522とこれに続き軸方向内側に延びた第
２円筒部1523とから構成されてなる。Next, the shaft-side seal ring 152 is formed by using a special steel plate for corrosion resistance, for example, a stainless steel plate, and has a substantially U-shaped cross section, and is tightly fitted to the shaft body 12. It is composed of a first cylindrical portion 1521 to be fixed, an intermediate portion 1522 extending radially outward from the first cylindrical portion 1521, and a second cylindrical portion 1523 subsequently extending axially inward.
【００１６】前記外輪側シール環151 の前記第１副リッ
プ1512が軸方向内向きに設けられて軸体12の外周面122
と接触し、主リップ1513が軸方向外向きに設けられて前
記軸側シール環152 の第１円筒部1521の外周面1524と接
してシール部を形成し、第２副リップ1514が軸側シール
環152 の第２円筒部1523の内周面1525との間で接触のシ
ール部を形成する。The first sub lip 1512 of the outer ring side seal ring 151 is provided inward in the axial direction, and the outer peripheral surface 122 of the shaft body 12 is provided.
The main lip 1513 is provided in the axially outward direction, and is in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521 of the shaft-side seal ring 152 to form a seal portion. A seal is formed between the ring 152 and the inner peripheral surface 1525 of the second cylindrical portion 1523.
【００１７】上記実施例において、外輪側シール環151
の第１副リップ1512は軸方向内向きに設けられて軸体12
の外周に接触していることにより軸受内のグリースが洩
れるのを防ぐと共に主リップ1513が軸側シール環152 の
第１円筒部1521の外周面と接することにより外部からの
異物の侵入を防止する中間シールの役目をなしシール部
が形成される。尚、本実施例においては第１副リップ15
12は軸体12の外周に接触していることにより、軸側シー
ル環152 と軸体12とのはめあい面から軸受内のグリース
が洩れるのを防ぐのにも効果的である。また、第２円筒
部1523の端面1526と外輪側シール環151 の側壁1515間に
すきまＣのラビリンスシールが形成される。In the above embodiment, the outer ring side seal ring 151 is used.
The first sub lip 1512 is provided inward in the axial direction to
The grease in the bearing is prevented from leaking due to contact with the outer periphery of the shaft, and the intrusion of foreign matter from the outside is prevented by the main lip 1513 being in contact with the outer peripheral surface of the first cylindrical portion 1521 of the shaft side seal ring 152. A seal part is formed by acting as an intermediate seal. In this embodiment, the first sub lip 15
The contact of the shaft 12 with the outer periphery of the shaft body 12 is also effective in preventing grease in the bearing from leaking from the fitting surface between the shaft side seal ring 152 and the shaft body 12. Further, a labyrinth seal having a clearance C is formed between the end surface 1526 of the second cylindrical portion 1523 and the side wall 1515 of the outer ring side seal ring 151.
【００１８】また、外輪側シール環151 の第２副リップ
1514が軸側シール環152 の第２円筒部1523の内周面に接
触（または非接触状態）により外部シールの役目をなす
シール部が形成され、また該シール部は、軸側シール環
152 の中間部1522と第２円筒部1523との協働作用により
軸受側に侵入しようとする冷却水、水蒸気を振り切るこ
とができる。The second auxiliary lip of the outer ring side seal ring 151
A seal portion serving as an external seal is formed by contacting (or non-contacting) the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 with the shaft side seal ring 152.
The cooperation between the intermediate portion 1522 and the second cylindrical portion 1523 makes it possible to shake off the cooling water and water vapor that tend to enter the bearing.
【００１９】要するに、本発明の軸受シール装置は、第
１副リップ1512が軸体12の外周面と接触、また主リップ
1513が第１円筒部1521の外周面と接触することにより形
成されるシール部と、第２副リップ1514が第２円筒部15
23の内周面との間で接触することにより形成されるシー
ル部の二重構造が形成される。また外輪側シール環151
の第２副リップ1514は、腕部1514a と、該腕部1514a の
先端に設けられた突起1514b とを有し、腕部1514a は軸
側シール環152 の第２円筒部1523と平行に軸方向内側に
延び、第２円筒部1523との間に軸方向シール隙間を形成
している。また、腕部1514a の先端に設けられた突起15
14b が、第２円筒部1523の内周面と接触している。ま
た、仮に摩耗により接触状態が非接触状態になったとし
ても、軸方向シール隙間によるラビリンスシールが形成
されているため、冷却水、水蒸気等の侵入は防止され
る。In short, in the bearing seal device of the present invention, the first sub lip 1512 is in contact with the outer peripheral surface of the shaft body 12 and the main lip 1512
A seal portion formed by contact of the outer peripheral surface of the first cylindrical portion 1521 with the second cylindrical portion 1521 is provided.
A double structure of a seal portion formed by contact between the inner peripheral surface of the seal member and the inner peripheral surface of the seal member is formed. Outer ring side seal ring 151
The second sub lip 1514 has an arm portion 1514a and a projection 1514b provided at the tip of the arm portion 1514a. The arm portion 1514a extends in the axial direction parallel to the second cylindrical portion 1523 of the shaft side seal ring 152. It extends inward and forms an axial seal gap with the second cylindrical portion 1523. Also, a protrusion 15 provided at the tip of the arm 1514a is provided.
14b is in contact with the inner peripheral surface of the second cylindrical portion 1523. Further, even if the contact state is changed to the non-contact state due to wear, since a labyrinth seal is formed by the axial seal gap, intrusion of cooling water, water vapor, and the like is prevented.
【００２０】さらに、軸側シール環152 の第２円筒部15
23は、外輪101 の端部よりも軸方向内側に延びて、端面
1526と外輪側シール環151 の側壁1515間にすきまＣのラ
ビリンスシールを形成することにより、ウォータポンプ
内の冷却水、水蒸気の侵入をくい止めることができる。Further, the second cylindrical portion 15 of the shaft side seal ring 152
23 extends inward in the axial direction from the end of the outer ring 101 and has an end face
By forming a labyrinth seal with a clearance C between 1526 and the side wall 1515 of the outer ring side seal ring 151, the intrusion of cooling water and water vapor in the water pump can be suppressed.
【００２１】また、外輪側シール環151 の補強環1511
は、一端部1511a が外輪101 に固定され、円筒状に形成
された中間部1511b を介して、他端部1511c が軸体側に
延びているので、他端部1511c は一端部1511a より軸方
向外側に位置し、他端部1511cは第１副リップ1512を補
強している。このため、第１副リップ1512は軸体12の外
周面と緊迫力をもって摺接することができ、ガータスプ
リング等を使用する必要がない。The reinforcing ring 1511 of the outer ring side seal ring 151
Since one end 1511a is fixed to the outer ring 101 and the other end 1511c extends toward the shaft via a cylindrical intermediate portion 1511b, the other end 1511c is axially outside the one end 1511a. And the other end 1511c reinforces the first sub lip 1512. For this reason, the first sub lip 1512 can slidably contact the outer peripheral surface of the shaft body 12 with a tightening force, and it is not necessary to use a garter spring or the like.
【００２２】図３は本発明の第２実施例を示す要部拡大
断面図で、前記第１実施例と異なる点は軸側シール環15
2 の第２円筒部1523を半径方向外方に延ばしたフランジ
部1527にある。従って、外輪側シール環151 の側壁1515
とフランジ部1527間のすきまＣ1 によりラビリンスシー
ルが形成される。作用効果は前記第１実施例と略同一に
つきその説明を省略する。FIG. 3 is an enlarged sectional view of a main part showing a second embodiment of the present invention.
The second cylindrical portion 1523 is provided on a flange portion 1527 extending radially outward. Therefore, the side wall 1515 of the outer ring side seal ring 151
Labyrinth seal is formed by the clearance C 1 between the flange portion 1527 and. The operation and effect are substantially the same as those of the first embodiment, and the description thereof is omitted.
【００２３】図４は本発明の第３実施例を示す要部拡大
断面図で、第２実施例と異なる点は軸側シール環152 の
第２円筒部1523の半径方向外方にさらに延びたフランジ
部1527にある。従って、前記フランジ部1527の外周端部
と外輪101 の端部内周面1014間にすきまＣ2 によるラビ
リンスが形成される。作用効果は前記第２実施例と略同
一につき、その説明を省略する。FIG. 4 is an enlarged sectional view of a main portion showing a third embodiment of the present invention. The difference from the second embodiment is that the second embodiment further extends radially outward of the second cylindrical portion 1523 of the shaft-side seal ring 152. It is on the flange 1527. Thus, the labyrinth is formed by a clearance C 2 between the end inner circumferential surface 1014 of the outer peripheral edge and the outer ring 101 of the flange portion 1527. The operation and effect are substantially the same as those of the second embodiment, and the description thereof is omitted.
【００２４】図５は本発明の第４実施例を示す要部拡大
断面図で、前記第１実施例と異なる点は補強環1611を有
する外輪側シール環161 の第１副リップ1612と主リップ
1613の両リップが軸体12に緊密嵌合固定された軸側シー
ル環162 の第１円筒部1621の外周と接触状態にしたとこ
ろと、軸側シール環162 の第２円筒部1623を半径方向外
方に延びたフランジ部1627の側壁1628と外輪101 の端面
1013間との間にすきまＣ3 によりラビリンスシールを形
成したところにある。FIG. 5 is an enlarged sectional view showing a main part of a fourth embodiment of the present invention, which differs from the first embodiment in that a first auxiliary lip 1612 and a main lip of an outer ring side seal ring 161 having a reinforcing ring 1611 are provided.
When both lips 1613 are brought into contact with the outer periphery of the first cylindrical portion 1621 of the shaft-side seal ring 162 tightly fitted and fixed to the shaft body 12, and the second cylindrical portion 1623 of the shaft-side seal ring 162 is Side wall 1628 of flange portion 1627 extending outward and end surface of outer ring 101
The clearance C 3 between the between 1013 located at the formation of the labyrinth seal.
【００２５】従って、主リップ1613と第１円筒部1621の
外周面1524間にシール部が形成され、またラビリンスシ
ールがフランジ部1627の側壁1628と外輪101 の端面1013
間のすきまＣ3 により形成される。作用効果は前記第１
実施例と略同一につきその説明を省略する。Accordingly, a seal portion is formed between the main lip 1613 and the outer peripheral surface 1524 of the first cylindrical portion 1621, and the labyrinth seal is formed between the side wall 1628 of the flange portion 1627 and the end surface 1013 of the outer ring 101.
It is formed by the clearance C 3 between. The operation effect is the first
The description is omitted because it is substantially the same as the embodiment.
【００２６】[0026]
【発明の効果】以上各実施例にて述べたように、シール
部を二重シール構造としたことにより軸方向スペースを
増すことなく低トルクで、かつ強力なシール機能を如何
なく発揮できる。特に軸の回転に伴う軸側シール環のス
リンガ作用と第２副リップとの相乗効果により更に有効
に機能する。また、補強環を一端部を外輪に固定し、円
筒状に形成された中間部を介して他端部が軸体側に延び
るようにしたので、第１副リップは緊迫力をもって回転
部材の外周面と摺接することができる。As described in each of the embodiments described above, the double sealing structure of the sealing portion can exert a low torque and strong sealing function without increasing the axial space. In particular, it functions more effectively due to the synergistic effect of the slinger action of the shaft side seal ring with the rotation of the shaft and the second sub lip. Also, since the reinforcing ring has one end fixed to the outer ring and the other end extending toward the shaft via the intermediate portion formed in a cylindrical shape, the first sub lip is provided with a tightening force so that the outer peripheral surface of the rotating member is pressed. Can be in sliding contact with
【００２７】また、主リップが軸側シール環の第１円筒
部の外周面と摺接することにより外部からの異物の侵入
を防止し、第１副リップが回転部材の外周面と摺接する
ことにより、軸受内のグリースが洩れるのを防止し、さ
らに第２副リップが主リップよりも外径側で軸側シール
環と摺接していること及び軸側シール環の中間部と第２
円筒部により軸受側に侵入しようとする冷却水、水蒸気
を振り切ることができる。さらに、軸側シール環の外径
側に延びた部分は外輪側シール環または外輪との間でラ
ビリンスシールを構成することにより、ウォータポンプ
内の冷却水、水蒸気の侵入をくい止めることができる。
従って、軸受寿命の著しい延長が図れることは勿論のこ
と、ウォータポンプ自体の信頼性を高めることのできる
など本発明特有の作用効果を奏するものである。Further, the main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, thereby preventing invasion of foreign matter from the outside, and the first sub lip is in sliding contact with the outer peripheral surface of the rotating member. To prevent the grease inside the bearing from leaking, and that the second sub lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip, and that the second sub lip is in contact with the intermediate portion of the shaft side seal ring.
The cooling water and the steam that are going to enter the bearing side can be shaken off by the cylindrical portion. Further, a portion extending to the outer diameter side of the shaft-side seal ring forms a labyrinth seal with the outer ring-side seal ring or the outer ring, so that intrusion of cooling water and water vapor in the water pump can be suppressed.
Therefore, it is possible to remarkably prolong the life of the bearing, and also to achieve the effects and advantages unique to the present invention, such as the improvement of the reliability of the water pump itself.
【図１】本発明装置を組込んだウォータポンプの要部断
面図である。FIG. 1 is a cross-sectional view of a main part of a water pump incorporating the device of the present invention.
【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
【図３】本発明の第２実施例を示す要部拡大断面図であ
る。FIG. 3 is an enlarged sectional view of a main part showing a second embodiment of the present invention.
【図４】本発明の第３実施例を示す要部拡大断面図であ
る。FIG. 4 is an enlarged sectional view of a main part showing a third embodiment of the present invention.
【図５】本発明の第４実施例を示す要部拡大断面図であ
る。FIG. 5 is an enlarged sectional view of a main part showing a fourth embodiment of the present invention.
101：外輪 11：ケーシング 12：軸体 13：転動体 130：プーリ 14：インペラ 15：シール装置 151, 161: 外輪側シール環 1511,1611：補強環 1512,1612：第１副リップ 1514,1614：第２副リップ 1513,1613：主リップ 152, 162：軸側シール環 1521,1621：第１円筒部 1522,1622：中間部 1523,1623：第２円筒部 101: Outer ring 11: Casing 12: Shaft 13: Rolling element 130: Pulley 14: Impeller 15: Seal device 151, 161: Outer ring side seal ring 1511, 1611: Reinforcement ring 1512, 1612: First sub lip 1514, 1614: Second auxiliary lip 1513, 1613: Main lip 152, 162: Shaft side seal ring 1521, 1621: First cylindrical portion 1522, 1622: Middle portion 1523, 1623: Second cylindrical portion
Claims (2)
にプーリを備え、他端側にインペラを備えた回転する軸
体との間に複数列の転動体を有し、かつ前記外輪の両端
部に固定されたシール環によって軸体との間をシールし
てなるウォータポンプ用軸受シール装置において、前記
シール環のうち、インペラ側のシール環は、補強環と、
ゴム、合成樹脂などの弾性体で形成した第１副リップと
主リップと、該主リップよりも外径側に位置する第２副
リップとを備えた外輪側シール環と、軸体に嵌合固定さ
れた第１円筒部と、これよりも外径側に延びた中間部
と、これに続き軸方向に延びた第２円筒部とを有し、軸
体と共に回転する軸側シール環とで構成され、前記主リ
ップが軸側シール環の第１円筒部の外周面と摺接し、第
１副リップが主リップより軸方向内側の回転部材の外周
面と摺接し、第２副リップが主リップよりも外径側で軸
側シール環と摺接し、軸側シール環の外径側に延びた部
分は、外輪側シール環または外輪との間でラビリンスシ
ールを構成していることを特徴とするウォータポンプ用
軸受シール装置。A plurality of rolling elements are provided between an outer ring fixed to a casing and a rotating shaft having a pulley at one end and an impeller at the other end, and both ends of the outer ring. In a bearing seal device for a water pump, wherein a seal ring is fixed to a shaft body by a seal ring fixed to a part, among the seal rings, a seal ring on an impeller side is a reinforcing ring,
An outer ring side seal ring including a first sub lip and a main lip formed of an elastic body such as rubber or synthetic resin, and a second sub lip located on an outer diameter side of the main lip; A shaft-side seal ring, which has a fixed first cylindrical portion, an intermediate portion extending outwardly from the first cylindrical portion, and a second cylindrical portion that subsequently extends in the axial direction, and rotates together with the shaft body. The main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, the first sub lip is in sliding contact with the outer peripheral surface of the rotating member axially inside the main lip, and the second sub lip is in main contact. The outer ring side of the lip is in sliding contact with the shaft-side seal ring, and a portion extending to the outer diameter side of the shaft-side seal ring forms a labyrinth seal with the outer ring-side seal ring or the outer ring. Bearing device for water pumps.
筒状に形成された中間部を介して、他端部が軸体側に延
びていることを特徴とする請求項１記載のウォータポン
プ用軸受シール装置。2. The water according to claim 1, wherein one end of the reinforcing ring is fixed to the outer ring, and the other end extends toward the shaft via an intermediate portion formed in a cylindrical shape. Bearing seal device for pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2572497A JP2833606B2 (en) | 1997-01-27 | 1997-01-27 | Bearing seal device for water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2572497A JP2833606B2 (en) | 1997-01-27 | 1997-01-27 | Bearing seal device for water pump |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8139755A Division JP2890354B2 (en) | 1990-01-30 | 1996-05-10 | Bearing seal device for water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09228991A JPH09228991A (en) | 1997-09-02 |
| JP2833606B2 true JP2833606B2 (en) | 1998-12-09 |
Family
ID=12173758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2572497A Expired - Fee Related JP2833606B2 (en) | 1997-01-27 | 1997-01-27 | Bearing seal device for water pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2833606B2 (en) |
-
1997
- 1997-01-27 JP JP2572497A patent/JP2833606B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09228991A (en) | 1997-09-02 |
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